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40UV

Carrier 40UV, UH050-200, 40UH050, 40UH075, 40UH100 Installation, Start-up And Service Instructions Manual

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Page 1
40UV,UH050-200
Unit Ventilators
with Product Integrated Control (PIC)
Installation, Start-Up and Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS ............................1
INTRODUCTION ......................................1,2
Unpack and Inspect Units ..............................1
Protect Units From Damage ............................1
Prepare Jobsite for Unit Installation ....................1
Identify and Prepare Units.............................2
PHYSICAL DATA ........................................2
INSTALLATION ......................................2-24
Placing Vertical Units in Position .......................2
Placing Horizontal Units in Position ....................2
Make Piping Connections...............................8
Make Electrical Connections............................8
Actuators (Field-Supplied)..............................8
Make Duct Connections .............................. 23
Make Final Preparations .............................. 24
PRODUCT INTEGRATED CONTROL ................24-46
Physical Characteristics .............................. 24
Unit Ventilator Comfort Control Module
Installation and Field Wiring ........................ 27
Carrier Comfort Network® Interface .................. 38
Direct Expansion (DX) Cooling........................ 41
DX System Design.................................... 41
Electric Heat.......................................... 42
Fire/Smoke Status Input .............................. 42
SET-UP, CONFIGURATION, AND
OPERATION ......................................46-49
Preventing Excessive Condensation on Unit.......... 50
Check Drain .......................................... 50
Fan Shaft Ball Bearing................................ 50
Clean Fan Wheel...................................... 50
Clean or Replace Air Filters........................... 50
ECM Motor Removal and Reinstallation............... 50
Blower Assembly Section Removal
and Reinstallation .................................. 52
Coil Assembly Removal and Reinstallation ........... 53
Ball Bearing Replacement ............................ 57
Blower Wheel Removal and Reinstallation ............ 62
Sleeve Bearing Replacement ......................... 63
Damper Section Removal and Reinstallation.......... 65
Face and Bypass Damper Tests ...................... 67
Filter Maintenance .................................... 68
Remote Start Input.................................... 68
Fire Shutdown Option ................................ 68
Electric Heat and Direct Expansion Cooling .......... 68
Mixed-Air Damper Sensors Final Calibration.......... 69
Unit Diagnostics and Troubleshooting ................ 69
SAFETY CONSIDERATIONS
Installation and servicing of this unit can be hazardous due to system pressure, electrical components and equipment location (such as a ceiling or elevated structure). Untrained personnel can perform the basic maintenance functions of replacing filters. Only trained and qualified service personnel should perform all other operations.
When installing this unit, observe precautions in the litera­ture, tags and labels attached to the equipment, and any other safety precautions that may apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling and installing this accessory.
• Use quenching cloth for all brazing operations.
• Have fire extinguisher available for all brazing
operations.
Before performing service or maintenance operations, turn off main power switch to the unit. Electrical shock could cause personal injury.
INTRODUCTION
This document contains general installation instructions for the 40UV,UH unit ventilators and information and trouble­shooting of the Product Integrated Control (PIC) option.
See submittal drawings for unit configurations, dimensions, clearances, and pipe connections. Refer to unit wiring label for all electrical connections; follow NEC (National Electrical Code) and local codes.
PREINSTALLATION
Unpack and Inspect Units —
from all units. Check the shipment against shipping order. If shipment is damaged or incomplete, file claim with transporta­tion company and advise Carrier immediately.
Remove shipping wraps
Protect Units From Damage — To maintain war-
ranty, protect units against adverse weather, theft, vandalism, and debris on jobsite. Do not allow foreign material to fall into drain pan. Prevent dust and debris from being deposited on motor and fan wheels.
If the equipment is stored for any length of time before in­stallation, it should remain in its shipping container in a clean, dry, and climate controlled area.
Prepare Jobsite for Unit Installation — To sa ve
time and to reduce the possibility of costly errors, set up a com­plete sample installation in a typical room at jobsite. Check all critical dimensions such as pipe, wire, and duct connection requirements. Refer to job drawings and product dimension drawings as required. Instruct all trades in their part of the installation.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 3 Ta b 2 a
Catalog No. 534-094 Printed in U.S.A. Form 40UV,UH-6SI Pg 1 7-05 Replaces: 40UV,UH-3SI
Page 2
Identify and Prepare Units
1. Be sure power requirements match available power source. Refer to the unit nameplate and wiring diagram.
2. Remove front (40UV) or bottom (40UH) access panels from the unit. Retain the
5
/32-in. socket head fasteners and
panels for reinstallation later.
3. Rotate the fan shaft by hand to ensure that fans are unrestricted and can rotate freely. Check for shipping damage and fan obstructions.
PHYSICAL DATA
Component weight data of 40UV,UH units is provided in
Table 1 .
5. Adjust unit leveling legs so unit is level. Unit must be level for proper operation and condensate drainage.
6. Using field-supplied fasteners, reach into unit and attach unit to the wall using the
3
/4in. mounting holes in the
back panel.
7. Protect the unit from jobsite debris. Do not allow foreign material to fall into drain pan. Prevent dust and debris from being deposited on motor or fan.
Placing Horizontal Units in Position
1. Select the unit location; ensure that service clearance is provided. Allow enough grille clearance to maintain unre­stricted airflow. Make sure that ceiling is able to support the weight of theunit. See Fig. 3-5 for nominal unit weight. See submittal drawings and Fig. 3-5 for dimensions.
INSTALLATION
NOTE: See page 23 for additional requirements for units ducted to multiple openings.
Units must be installed level and plumb. Failure to do so may result in excessive vibration and/or premature failure.
2. Ensure that bottom panels have been removed from unit. When unit is lifted, access to the through the bottom of the unit. Hanger rods and fasteners and other required hardware must be field supplied.
3
/4in. mounting holes is
3. Using a forklift or other mechanical lifting device, raise
Placing Vertical Units in Position
1. Select the unit location; ensure that service clearance is provided. Allow enough grille clearance to maintain unrestricted airflow. See submittal drawings and Fig. 1 and 2 for dimensions.
2. Make sure wall behind unit is smooth and plumb; if necessary, install furring strips on walls with irregular surfaces or mullions. Furring strips must be positioned behind mounting holes in unit. Fasteners, furring strips, and other seals (if required) must be field supplied.
3. Remove all wall and floor moldings from behind the unit.
4. Move unit into position. Unit must be snug against wall and furring strips.
the unit to the mounting position. If forklift or other lifting device is likely to contact a painted wall surface, protect the surface as necessary.
4. Use rods and fasteners to suspend the unit at the mounting holes on the top of the unit. The unit must be suspended at
3
/4in. mounting holes; do not use any other locations.
the
5. If desired, install field-supplied vibration isolators. Adjust isolators so unit is uniformly suspended and pitched.
6. To ensure proper drainage and operation, ensure unit is level and tighten all fasteners. DO NOT mount the unit on a slope. Pitch of horizontal suspended units can change after coil is filled; recheck after filling coil.
7. Protect the unit from jobsite debris. Do not allow foreign material to fall into drain pan. Prevent dust and debris from being deposited on motor or fan.
Table 1 — Physical Data
UNIT 40UV,UH 050* 075 100 125 150 200† NOMINAL AIRFLOW (Cfm) 500 750 1000 1250 1500 2000 FANS
Quantity 123455 Diameter (in.) 8.32 8.32 8.32 8.32 8.32 9.5 Width (in.) 888886
FILTERS
Nominal Size (in.) (1 in. thick) 9 Nominal Size (in.) (2 in. thick) 9x241/ Quantity 111111
40UV SHIPPING WEIGHT**
(Approx lb)
5
/8in. Deep Unit 330 400 480 590 660 —
16 217/8in. Deep Unit 340 410 490 605 675 —
40UH SHIPPING WEIGHT**
(Approx lb)
1
30
/2in. Deep Unit — 420 500 620 690 — 36 in. Deep Unit — 500 600 740 830 — 40 in. Deep Unit — 530 640 790 880 1020 44 in. Deep Unit —————1050
40UV INSTALLED WEIGHT**
(Approx lb)
5
16
/8in. Deep Unit 315 380 460 570 640 —
7
21
/8in. Deep Unit 325 390 470 595 655 —
40UH INSTALLED WEIGHT**
(Approx lb)
1
30
/2in. Deep Unit — 405 480 600 670 — 36 in. Deep Unit — 485 580 720 810 — 40 in. Deep Unit — 515 620 770 860 1000 44 in. Deep Unit —————1030
COIL WATER WEIGHT
(Approx lb per row of coil)
COIL CONNECTIONS (in. OD) Return Supply
Water Coils with 1 to 5 Rows Steam Coils (All Units)
DX Coils
LEGEND
DX — Direct Expansion
3
/4x241/
4
4
1.0 1.5 2.0 2.4 2.7 2.7
93/4x361/
4
9x361/
4
7
/
8
7
/
8
Suction Liquid
7
/
8
93/4x481/
4
9x481/
4
*40UV only.
†40UH 40 and 44 in. deep units only.
**Weight based on damper-controlled unit with 5-row coil and factory-installed
controls.
93/4x601/
9x601/
4
4
93/4x721/
9x721/
11/
4
4
7
/
8
8
3
/
8
93/4x721/
9x721/
4
4
2
Page 3
.78
(TYP)
10.61 (TYP)
REMOVABLE BOTTOM PANEL (EACH END)
12.37 (TYP)
2.08 (TYP)
(UNIT SHOWN
WITH 1.00" END
CCN CONTR (OPTIONAL)
FRONT SERVICE PANELS (SEE NOTE 3)
1.00
PANELS)
OLLER
5.22
12.10 (TYP)
8.08 (TYP-SEE NOTE 2)
W3
TOP VIEW
W1
(SEE NOTE 2)
FRONT VIEW
REMOVABLE PANEL
(
EACH END)
PIPE TUNNEL
16.63
1.70
BARSTOCK DISCHARGE GRILLE
MOTOR
PIPING
2.00
RECESSED RETURN AIR/KICK PANEL
7.04 (TYP)
1.54 (TYP)
7.00 (TYP)
TUNNEL
ELECTRICAL BOX
NON-FUSED DISCONNECT SWITCH
2.95
PIPING ACCESS OPENING (EACH END)
16.63
2.40
13.90
7.02
27.30
30.00
RIGHT SIDE VIEW
(MOUNTING HOLES-TYP­4 PLACES)
UNIT 40UV
18.25 (TYP)
.75
AIRFLOW
(cfm)
15.00 (TYP)
4.50
DIMENSIONS (in.) APPROXIMATE
W1 W2 W3
WEIGHT (lb)
W2
REAR VIEW
SHIPPING
OUTSIDE AIR OPENING
.90
APPROXIMATE
INSTALLED
WEIGHT (lb) 050 500 50 24 16.60 330 315 075 750 62 36 31.67 400 380 100 1000 74 48 46.74 480 460 125 1250 86 60 61.81 590 570 150 1500 98 72 78.47 660 640
Fig. 1 — 40UV Dimensions — 165/8-in. Deep Units
(Standard)
17.50
6.75 (TYP)
(TYP)
22.00 (TYP)
2.00 (TYP)
LEGEND
CCN — Carrier Comfort Network®
NOTES:
1. All dimensions are in inches.
2. Dimension does not include end panels.
3. Three front panels provided for service access.
4. Motor and electrical power input box on right side of unit. Box includes fan speed switch, On/Off switch and non-fused disconnect switch.
5. Connection hand is determined by facing discharge of unit.
3
Page 4
5.98 (TYP)
10.61 (TYP)
REMOVABLE BOTTOM PANEL (EACH END)
5.20
12.37 (TYP)
2.08 (TYP)
(UNIT SHOWN
WITH 1.00" END
CCN CONTROLLER (OPTIONAL)
1.00
PANELS)
FRONT SERVICE PANELS (SEE NOTE 3)
5.22
12.00 (TYP)
8.08 (TYP-SEE NOTE 2)
W3
TOP VIEW
W1
(SEE NOTE 2)
FRONT VIEW
REMOVABLE PANEL (EACH END)
PIPE TUNNEL
STOCK
BAR DISCHARGE GRILLE
MOTO R
2.00
3.00
RECESSED RETURN AIR/KICK PANEL
7.04 (TYP)
1.54 (TYP)
7.00 (TYP)
21.88
1.70
ELECTRICAL BOX
NON-FUSED DISCONNECT SWITCH
PIPING ACCESS OPENING (EACH END)
PIPING TUNNEL
2.40
1.74
7.02
13.75
27.30
30.00
19.37
END VIEW
(MOUNTING HOLES-TYP­4 PLACES)
UNIT 40UV
15.00
18.25 (TYP)
.75
AIRFLOW
(cfm)
(TYP)
4.50
DIMENSIONS (in.) APPROXIMATE
W1 W2 W3
W2
OUTSIDE AIR OPENING
REAR VIEW
SHIPPING
WEIGHT (lb)
0.90
APPROXIMATE
INSTALLED
WEIGHT (lb) 050 500 50 24 16.60 340 325 075 750 62 36 31.67 410 390 100 1000 74 48 46.74 490 470 125 1250 86 60 61.81 605 595 150 1500 98 72 78.47 675 655
Fig. 2 — 40UV Dimensions — 217/8-in. Deep Units
(With Piping Chase)
17.50 (TYP)
6.75 (TYP)
22.00 (TYP)
2.00
(TYP)
LEGEND
CCN — Carrier Comfort Network®
NOTES:
1. All dimensions are in inches.
2. Dimension does not include end panels.
3. Three front panels provided for service access.
4. Motor and electrical power input box on right side of unit. Box includes fan speed switch, On/Off switch and non-fused disconnect switch.
5. Connection hand is determined by facing dis­charge of unit.
4
Page 5
W3
16.63
30.50
LEFT SIDE VIEW
(UNIT SHOWN
WITH 1.00" END
CCN CONTROLLER (OPTIONAL)
BOTTOM SERVICE PANELS (SEE NOTE 3)
1.00
PANELS)
5.22
8.08 (TYP-SEE NOTE 2)
FRONT VIEW
W1
(SEE NOTE 2)
BOTTOM VIEW
REMOVABLE PANEL (EACH END)
1.70
BARSTOCK DISCHARGE GRILLE (OPTIONAL)
MOTOR
2.00 ELECTRICAL
BOX
NON-FUSED DISCONNECT SWITCH
RETURN AIR LOUVER (OPTIONAL)
ED PANEL
1.54 (TYP)
15.00
18.25
(TYP)
(TYP)
.75 (MOUNTING HOLES-TYP­4 PLACES)
2.27
5.00
LEGEND
CCN — Carrier Comfort Network®
UNIT
AIRFLOW
40UH
075 750 62 36 31.67 420 405 100 1000 74 48 46.74 500 480 125 1250 86 60 61.81 620 600 150 1500 98 72 78.47 690 670
(cfm)
DIMENSIONS (in.) APPROXIMATE
W1 W2 W3
SHIPPING
WEIGHT (lb)
APPROXIMATE
INSTALLED
WEIGHT (lb)
W2
OUTSIDE AIR OPENING
4.50
1.00
TOP VIEW
W2
REAR OUTSIDE AIR OPENING (OPTIONAL)
REAR RETURN AIR OPENING (OPTIONAL)
REAR VIEW
NOTES:
1. All dimensions are in inches.
2. Dimension does not include end panels.
3. Two bottom panels provided for service access.
4. Motor and electrical power input box on right side of unit. Box includes fan speed switch, On/Off switch and non-fused disconnect switch.
5. Connection hand is determined by facing discharge of unit.
17.50 (TYP)
2.50 (TYP)
6.75 (TYP)
3.00
5.75
Fig. 3 — 40UH Dimensions — 301/2-in. Deep Units
5
Page 6
16.63
36.00
LEFT SIDE VIEW
(SIZES 075 TO 150)
4.00
40.00
LEFT SIDE VIEW
(SIZE 200)
(UNIT SHOWN
7.50
WITH 1.00"
END PANELS)
PIPE TUNNEL
CCN CONTROLLER (OPTIONAL)
BOTTOM SERVICE PANELS (SEE NOTE 3)
REMOVABLE PANEL (EACH EN
D)
1.00
(OPENING)
8.00 (TYP-SEE NOTE 2)
W5
W3 (OPENING)
FRONT VIEW
W1
(SEE NOTE 2)
MOTOR
RETURN AIR LOUVERED PANEL (OPTIONAL)
BOTTOM VIEW
.75 (MOUNTING HOLES­TYP-4 PLACES)
TOP OUTSIDE AIR OPENING (OPTIONAL)
4.00 (TO OPENING)
DOUBLE DEFLECTION DISCHARGE GRILLE (OPTIONAL)
ELECTRICAL BOX
NON-FUSED DISCONNECT SWITCH
4.75 (TYP)
1.00 (TYP)
W4
(TYP)
3.67 (TYP)
2.27
5.00
5.75
LEGEND
CCN — Carrier Comfort Network®
UNIT 40UH
AIRFLOW
(cfm)
DEPTH
(in.)
DIMENSIONS (in.) APPROXIMATE
W1 W2 W3 W4 W5
SHIPPING
WEIGHT (lb)
APPROXIMATE
INSTALLED
WEIGHT (lb) 075 750 36 62 36 36 18.67 7.00 500 485 100 1000 36 74 48 48 18.67 7.00 600 580 125 1250 36 86 60 60 18.67 7.00 740 720 150 1500 36 98 72 72 18.67 7.00 830 810 200 2000 40 98 72 72 26.92 10.00 1020 1000
W2
1.25
REAR OUTSIDE AIR OPENING (OPTIONAL)
REAR RETURN AIR OPENING (OPTIONAL)
TOP VIEW
W2
REAR VIEW
NOTES:
1. All dimensions are in inches.
2. Dimension does not include end panels.
3. Two bottom panels provided for service access.
4. Motor and electrical power input box on right side of unit. Box includes fan speed switch, On/Off switch and non-fused dis­connect switch.
5. Connection hand is determined by facing discharge of unit.
4.50
17.50 (TYP)
2.50
(TYP)
6.75 (TYP)
3.00
Fig. 4 — 40UH Dimensions — Front Discharge Units
6
Page 7
16.63
40.00
LEFT SIDE VIEW
(SIZES 075 TO 150)
4.00
44.00
LEFT SIDE VIEW
(SIZE 200)
7.50
(UNIT SHOWN
END PANELS)
PIPE TUNNEL
CCN CONTROLLER (OPTIONAL)
BOTTOM SERVICE PANELS (SEE NOTE 3)
REMOVABLE PANEL (EACH EN
1.00
WITH 1.00"
W5 (OPENING)
(TYP-SEE NOTE 2)
D)
8.00
FRONT VIEW
W1
(SEE NOTE 2)
W3
(OPENING)
RETURN AIR LOUVERED PANEL (OPTIONAL)
BOTTOM VIEW
TOP OUTSIDE AIR OPENING (OPTIONAL)
4.75 (TYP)
MOTOR
ELECTRICAL BOX
NON-FUSED
SCONNECT
DI SWITCH
1.00 (TYP)
W4
(TYP)
3.67 (TYP)
(MOUNTING HOLES-
TYP-4 PLACES)
LEGEND
.75
2.27
5.00
5.75
CCN — Carrier Comfort Network®
UNIT
AIRFLOW
40UH
(cfm)
075 750 40 62 36 36 18.67 7.00 530 515 100 1000 40 74 48 48 18.67 7.00 640 620 125 1250 40 86 60 60 18.67 7.00 790 770 150 1500 40 98 72 72 18.67 7.00 880 860 200 2000 44 98 72 72 26.92 10.00 1050 1030
DEPTH
(in.)
DIMENSIONS (in.) APPROXIMATE
W1 W2 W3 W4 W5
SHIPPING
WEIGHT (lb)
APPROXIMATE
W2
1.25
TOP VIEW
W2
REAR OUTSIDE AIR OPENING (OPTIONAL)
REAR RETURN AIR OPENING (OPTIONAL)
REAR VIEW
NOTES:
INSTALLED
WEIGHT (lb)
17.50 (TYP)
2.50
4.50
3.00
1. All dimensions are in inches.
2. Dimension does not include end panels.
3. Two bottom panels provided for service access.
4. Motor and electrical power input box on right side of unit. Box includes fan speed switch, On/Off switch and non­fused disconnect switch.
5. Connection hand is determined by fac­ing discharge of unit.
(TYP)
6.75 (TYP)
Fig. 5 — 40UH Dimensions — Down Discharge Plenum
7
Page 8
Make Piping Connections — Access to piping is
available through the access panels at the front, top, or end of the vertical unit (horizontal access from bottom or side). Route piping through the pipe tunnel or the unit’s back panel or floor panel. Metal blank-off panels must be trimmed to complete piping installation. All piping connections must be performed by qualified personnel in accordance with local and national codes.
DRAIN CONNECTIONS — Condensate drain connections are located on each end of the drain pan near the bottom of the unit. Condensate drain line must be galvanized pipe, PVC or similar plastic pipe. Install drain line in accordance with all applicable codes. Insulate the drain line to prevent sweating. See Fig. 6 for typical drain trap construction.
Units with cooling coils require traps to prevent air from entering the condensate fitting and preventing proper drainage. Drain must flow downhill from the unit a minimum of per ft. Drain must be free and clear at all times.
3
/4in. copper tubing,
1
/8in.
3/4"
PVC OR COPPER
3" MIN
2" MIN
3" MIN
2" MIN
3/4"
GALVANIZED PIPE
Fig. 6 — Typical Condensate Drain Trap
Construction
EQUALIZER
SENSING BULB (CLAMPED TO SUCTION LINE AND INSULATED)
SUCTION LINE
Insulate drain lines to prevent condensate. Care must be taken to avoid interference with control panel on left side drain.
WATER SUPPLY/RETURN CONNECTIONS — Install pip­ing in accordance with all applicable codes. All piping must be supported separately from coils.
Water supply must be connected so that entering water is on leaving-air side of coil. See the connection labels on the unit to locate the inlet. Coils must be adequately vented to prevent air binding. Be sure valves are in proper operating position and are easily accessible for adjustment.
If coil and valve package connections will be made with a solder joint, care should be taken to ensure that components in the valve package are not subjected to high temperatures which may damage seals or other materials. Many 2-position electric control valves are provided with a manual operating lever. This lever should be in the OPEN position during all soldering operations.
If coil connection is made with a union, the coil side of the union must be prevented from turning (it must be backed up) during tightening. Do not overtighten! Overtightening will dis-
tort (egg shape) the union seal surface and destroy the union.
NOTE: A freezestat is factory-installed when a hot water/steam coil is installed.
STEAM CONNECTIONS — On units with steam heating coils, the maximum steam pressure applied to the unit should never exceed 10 psig (operating pressure 6 psig).
DIRECT EXPANSION REFRIGERANT PIPING — Use the condensing unit manufacturer’s recommended line sizes and requirements. Perform leak test using nitrogen. Evacuate and charge per recommended heating, ventilation, and air condi­tioning (HVAC) procedures and all applicable codes. Insulate suction line after leak test up to the coil section end plate for correct operation and to eliminate sweating. Use refrigerant­grade copper lines only. The unit is NOT to be applied as a heat pump.
See Fig. 7 for refrigerant piping connections with recom­mended locations for the thermostatic expansion valve (TXV) and sensing bulb.
HYDRONIC COIL PIPING — When all joints are complete, perform hydrostatic test for leaks. Vent all coils at this time. Check interior unit piping for signs of leakage from shipping damage or mishandling. If leaks are found, notify a Carrier representative before initiating any repairs. Release trapped air from system (refer to Make Final Preparations section).
LIQUID LINE
NOTE: Follow TXV manufacturer’s instructions.
Fig. 7 — Typical TXV (Thermostatic Expansion
Valve) Installation
All water coils must be protected from freezing after initial filling with water. Even if system is drained, unit coils may still have enough remaining water to cause damage when exposed to temperatures below freezing.
Following the hydrostatic test, insulate all piping up to the
coil section end plate to prevent sweating.
To ensure compliance with building codes, restore the struc­ture’s original fire resistance rating by sealing all holes with material carrying the same fire rating as the structure.
Make Electrical Connections — Refer to unit serial
plate for required supply voltage, fan and heater amperage, and required circuit ampacities. Refer to unit wiring diagram for unit and field wiring. See Tables 2-4 for electrical data.
All input power wiring connections are accessed through the electrical panel on front right-hand side of the unit. Use the openings that are for the piping connections. See the dimen­sional drawings Fig. 1-5 for electrical box connections.
The fan motor should never be controlled by any wiring or device other than the factory-supplied switch or thermostat/ switch combination unless prior factory authorization is ob­tained. Fan motor may be temporarily wired for use during construction only with prior factory approval and only in strict accordance with the instructions issued at that time.
All electrical connections should be made by qualified per­sonnel and be in accordance with governing codes and ordinanc­es. Any modification of unit wiring without factory authorization will invalidate all factory warranties and nullify any agency list­ings. See Fig. 8A and 8B for typical wiring connections for basic unit with CCN (Carrier Comfort Network®) controls.
Actuators (Field-Supplied) — Field-supplied actuators
must be mounted on
1
/2in. diameter damper shafts.
8
Page 9
Table 2 — Electric Heater Data for Units with PSC Motor
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 17.2 90 21.5 25 3.2
208/1/60
4 22.2 97 27.8 30 4.2 5 27.3 104 34.1 35 5.3 6 32.3 110 40.4 45 6.3 3 19.5 97 24.4 25 4.2
240/1/60
4 25.3 106 31.7 35 5.6 5 31.2 115 39.0 40 7.0 6 37.0 124 46.3 50 8.4 3 16.8 97 21.0 25 4.2 4 21.8 106 27.3 30 5.6 5 26.9 115 33.6 35 7.0 6 31.9 124 39.9 40 8.4 3 10.8 90 13.5 15 3.2 4 15.8 97 19.8 20 4.2 5 19.5 104 24.4 25 5.3
40UV050
(at 500 Cfm)
277/1/60
1
/
5
208/3/60
6 19.5 110 24.4 25 6.3 3 12.1 97 15.1 20 4.2
240/3/60
4 17.9 106 22.4 25 5.6 5 22.2 115 27.8 30 7.0 6 22.2 124 27.8 30 8.4 3 6.0 97 7.5 15 4.2
460/3/60
4 8.9 106 11.1 15 5.6 5 11.0 115 13.8 15 7.0 6 11.0 124 13.8 15 8.4
LEGEND NOTES:
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
FLA
LAT
(F)
MCA MOCP
TOTAL
CAPACITY
(kW)
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
9
Page 10
Table 2 — Electric Heater Data for Units with PSC Motor (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 23.7 89 29.6 30 4.5
208/1/60
4 30.9 96 38.6 40 6.0 5 38.1 102 47.6 50 7.5 6 45.3 108 56.7 60 9.0 3 27.0 96 33.8 35 6.0
240/1/60
4 35.3 104 44.2 45 8.0 5 43.7 113 54.6 60 10.0 6 52.0 121 65.0 70 12.0 3 23.3 96 29.1 30 6.0 4 30.5 104 38.1 40 8.0 5 37.7 113 47.1 50 10.0 6 44.9 121 56.2 60 12.0 3 14.5 89 18.2 20 4.5 4 21.7 96 27.2 30 6.0 5 27.0 102 33.8 35 7.5
40UV,UH075 (at 750 Cfm)
277/1/60
1
/
5
208/3/60
6 27.0 108 33.8 35 9.0 3 16.5 96 20.6 25 6.0
240/3/60
4 24.8 104 31.0 35 8.0 5 30.9 113 38.6 40 10.0 6 30.9 121 38.6 40 12.0 3 8.2 96 10.2 15 6.0
460/3/60
4 12.3 104 15.4 20 8.0 5 15.4 113 19.2 20 10.0 6 15.4 121 19.2 20 12.0
LEGEND NOTES:
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
FLA
LAT
(F)
MCA MOCP
TOTAL
CAPACITY
(kW)
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
10
Page 11
Table 2 — Electric Heater Data for Units with PSC Motor (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 30.9 89 38.6 40 6.0
208/1/60
4 40.5 95 50.7 60 8.0 5 50.2 102 62.7 70 10.0 6 59.8 108 74.7 80 11.9 3 35.3 96 44.2 45 8.0
240/1/60
4 46.5 104 58.1 60 10.7 5 57.6 112 72.0 80 13.3 6 68.7 121 85.8 90 16.0 3 30.5 96 38.1 40 8.0 4 40.1 104 50.1 60 10.7 5 49.7 112 62.2 70 13.3 6 59.4 121 74.2 80 16.0 3 18.7 89 23.4 25 6.0 4 28.3 95 35.4 40 8.0 5 35.4 102 44.3 45 10.0
40UV,UH100
(at 1000 Cfm)
277/1/60
1
/
5
208/3/60
6 35.4 108 44.3 45 11.9 3 21.3 96 26.6 30 8.0
240/3/60
4 32.4 104 40.5 45 10.7 5 40.5 112 50.7 60 13.3 6 40.5 121 50.7 60 16.0 3 10.6 96 13.2 15 8.0
460/3/60
4 16.1 104 20.1 25 10.7 5 20.2 112 25.2 30 13.3 6 20.2 121 25.2 30 16.0
LEGEND NOTES:
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
FLA
LAT
(F)
MCA MOCP
TOTAL
CAPACITY
(kW)
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
11
Page 12
Table 2 — Electric Heater Data for Units with PSC Motor (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 38.1 89 47.6 50 7.5
208/1/60
4 50.1 96 62.7 70 10.0 5 62.2 102 77.7 80 12.5 6 74.2 108 92.8 100 15.0 3 43.7 96 54.6 60 10.0
240/1/60
4 57.6 104 71.9 80 13.3 5 71.4 113 89.3 90 16.7 6* 85.3 121 106.7 110 20.0 3 37.7 96 47.1 50 10.0 4 49.7 104 62.2 70 13.3 5 61.8 113 77.2 80 16.7 6 73.8 121 92.2 100 20.0 3 22.9 89 28.6 30 7.5 4 34.9 96 43.6 45 10.0 5 43.7 102 54.7 60 12.5
40UV,UH125
(at 1250 Cfm)
277/1/60
1
/
5
208/3/60
6 43.7 108 54.7 60 15.0 3 26.1 96 32.6 35 10.0
240/3/60
4 40.0 104 50.0 50 13.3 5 50.2 113 62.7 70 16.7 6 50.2 121 62.7 70 20.0 3 13.0 96 16.2 20 10.0
460/3/60
4 19.9 104 24.9 25 13.3 5 25.0 113 31.3 35 16.7 6 25.0 121 31.3 35 20.0
LEGEND
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
*Left hand coil connections only.
FLA
LAT
(F)
NOTES:
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
MCA MOCP
TOTAL
CAPACITY
(kW)
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
12
Page 13
Table 2 — Electric Heater Data for Units with PSC Motor (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 45.3 89 56.7 60 9.0
208/1/60
4 59.8 96 74.7 80 12.0 5 74.2 102 92.8 100 15.0 6* 88.7 108 110.8 125 18.0 3 52.0 96 65.0 70 12.0
240/1/60
4 68.7 104 85.8 90 16.0 5* 85.3 113 106.7 110 20.0 6 ————— 3 44.9 96 56.2 60 12.0 4 59.4 104 74.2 80 16.0 5 73.8 113 92.3 100 20.0 6 ————— 3 27.0 89 33.8 35 9.0 4 41.5 96 51.9 60 12.0 5 52.1 102 65.1 70 15.0
40UV,UH150
(at 1500 Cfm)
277/1/60
1
/
5
208/3/60
6 52.1 108 65.1 70 18.0 3 30.9 96 38.6 40 12.0
240/3/60
4 47.6 104 59.5 60 16.0 5 59.8 113 74.8 80 20.0 6 59.8 121 74.8 80 24.0 3 15.4 96 19.2 20 12.0
460/3/60
4 23.7 104 29.6 30 16.0 5 29.8 113 37.3 40 20.0 6 29.8 121 37.3 40 24.0
LEGEND
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
*Left hand coil connections only.
FLA
LAT
(F)
NOTES:
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
MCA MOCP
TOTAL
CAPACITY
(kW)
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
13
Page 14
Table 3 — Electric Heater Data for Units with ECM
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 16.5 90 20.6 25 3.2
208/1/60
4 21.5 97 26.9 30 4.2 5 26.6 104 33.2 35 5.3 6 31.6 110 39.5 40 6.3 3 18.8 97 23.5 25 4.2
240/1/60
4 24.6 106 30.8 35 5.6 5 30.5 115 38.1 40 7.0 6 36.3 124 45.4 50 8.4 3 16.3 97 20.3 25 4.2 4 21.3 106 26.6 30 5.6 5 26.4 115 33.0 35 7.0 6 31.4 124 39.3 40 8.4 3 10.1 90 12.6 15 3.2 4 15.1 97 18.9 20 4.2 5 18.8 104 23.5 25 5.3
40UV050
(at 500 Cfm)
277/1/60
1
/
3
208/3/60
6 18.8 110 23.5 25 6.3 3 11.4 97 14.3 15 4.2
240/3/60
4 17.2 106 21.6 25 5.6 5 21.5 115 26.9 30 7.0 6 21.5 124 26.9 30 8.4 3 5.4 97 6.8 15 4.2
460/3/60
4 8.3 106 10.4 15 5.6 5 10.5 115 13.1 15 7.0 6 10.5 124 13.1 15 8.4
LEGEND NOTES:
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
FLA
LAT
(F)
MCA MOCP
TOTAL
CAPACITY
(kW)
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
14
Page 15
Table 3 — Electric Heater Data for Units with ECM (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 24.0 89 30.0 30 4.5
208/1/60
4 31.2 96 39.0 40 6.0 5 38.4 102 48.0 50 7.5 6 45.6 108 57.0 60 9.0 3 27.3 96 34.1 35 6.0
240/1/60
4 35.6 104 44.5 45 8.0 5 44.0 113 55.0 60 10.0 6 52.3 121 65.4 70 12.0 3 23.7 96 29.6 30 6.0 4 30.9 104 38.6 40 8.0 5 38.1 113 47.6 50 10.0 6 45.3 121 56.7 60 12.0 3 14.8 89 18.5 20 4.5 4 22.0 96 27.6 30 6.0 5 27.3 102 34.2 35 7.5
40UV,UH075 (at 750 Cfm)
277/1/60
1
/
3
208/3/60
6 27.3 108 34.2 35 9.0 3 16.8 96 20.9 25 6.0
240/3/60
4 25.1 104 31.4 35 8.0 5 31.2 113 39.0 40 10.0 6 31.2 121 39.0 40 12.0 3 8.2 96 10.2 15 6.0
460/3/60
4 12.3 104 15.4 20 8.0 5 15.4 113 19.2 20 10.0 6 15.4 121 19.2 20 12.0
LEGEND NOTES:
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
FLA
LAT
(F)
MCA MOCP
TOTAL
CAPACITY
(kW)
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
15
Page 16
Table 3 — Electric Heater Data for Units with ECM (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 31.5 89 39.4 40 6.0
208/1/60
4 41.1 95 51.4 60 8.0 5 50.8 102 63.4 70 10.0 6 60.4 108 75.5 80 11.9 3 35.9 96 44.9 45 8.0
240/1/60
4 47.1 104 58.8 60 10.7 5 58.2 112 72.7 80 13.3 6 69.3 121 86.6 90 16.0 3 31.2 96 39.0 40 8.0 4 40.8 104 51.0 60 10.7 5 50.4 112 63.1 70 13.3 6 60.1 121 75.1 80 16.0 3 19.3 89 24.1 25 6.0 4 28.9 95 36.2 40 8.0 5 36.0 102 45.0 50 10.0
40UV,UH100
(at 1000 Cfm)
277/1/60
1
/
3
208/3/60
6 36.0 108 45.0 50 11.9 3 21.9 96 27.3 30 8.0
240/3/60
4 33.0 104 41.2 45 10.7 5 41.1 112 51.4 60 13.3 6 41.1 121 51.4 60 16.0 3 10.6 96 13.3 15 8.0
460/3/60
4 16.2 104 20.2 25 10.7 5 20.3 112 25.3 30 13.3 6 20.3 121 25.3 30 16.0
LEGEND NOTES:
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
FLA
LAT
(F)
MCA MOCP
TOTAL
CAPACITY
(kW)
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
16
Page 17
Table 3 — Electric Heater Data for Units with ECM (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 39.4 89 49.3 50 7.5
208/1/60
4 51.5 96 64.3 70 10.0 5 63.5 102 79.4 80 12.5 6 75.5 108 94.4 100 15.0 3 45.0 96 56.2 60 10.0
240/1/60
4 58.9 104 73.6 80 13.3 5 72.7 113 90.9 100 16.7 6* 86.6 121 108.3 110 20.0 3 39.0 96 48.7 50 10.0 4 51.0 104 63.8 70 13.3 5 63.1 113 78.8 80 16.7 6 75.1 121 93.9 100 20.0 3 24.2 89 30.2 35 7.5 4 36.2 96 45.3 50 10.0 5 45.0 102 56.3 60 12.5
40UV,UH125
(at 1250 Cfm)
277/1/60
1
/
2
208/3/60
6 45.0 108 56.3 60 15.0 3 27.4 96 34.2 35 10.0
240/3/60
4 41.3 104 51.6 60 13.3 5 51.5 113 64.3 70 16.7 6 51.5 121 64.3 70 20.0 3 13.2 96 16.5 20 10.0
460/3/60
4 20.2 104 25.2 30 13.3 5 25.3 113 31.6 35 16.7 6 25.3 121 31.6 35 20.0
LEGEND
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
*Left hand coil connections only.
FLA
LAT
(F)
NOTES:
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
MCA MOCP
TOTAL
CAPACITY
(kW)
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
17
Page 18
Table 3 — Electric Heater Data for Units with ECM (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 46.7 89 58.3 60 9.0
208/1/60
4 61.1 96 76.4 80 12.0 5 75.6 102 94.4 100 15.0 6* 90.0 108 112.5 125 18.0 3 53.3 96 66.6 70 12.0
240/1/60
4 70.0 104 87.5 90 16.0 5* 86.6 113 108.3 110 20.0 6 ————— 3 46.2 96 57.8 60 12.0 4 60.7 104 75.8 80 16.0 5 75.1 113 93.9 100 20.0 6 ————— 3 28.3 89 35.4 40 9.0 4 42.8 96 53.5 60 12.0 5 53.4 102 66.7 70 15.0
40UV,UH150
(at 1500 Cfm)
277/1/60
1
/
2
208/3/60
6 53.4 108 66.7 70 18.0 3 32.2 96 40.3 45 12.0
240/3/60
4 48.9 104 61.1 70 16.0 5 61.1 113 76.4 80 20.0 6 61.1 121 76.4 80 24.0 3 15.6 96 19.5 20 12.0
460/3/60
4 24.0 104 30.0 30 16.0 5 30.1 113 37.6 40 20.0 6 30.1 121 37.6 40 24.0
LEGEND
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
*Left hand coil connections only.
FLA
LAT
(F)
NOTES:
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
MCA MOCP
TOTAL
CAPACITY
(kW)
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
18
Page 19
Table 3 — Electric Heater Data for Units with ECM (cont)
UNIT HP
NOMINAL
V/Ph/Hz
NUMBER
OF
ELEMENTS
3 50.1 84 62.7 70 9.0
208/1/60
4 64.6 89 80.7 90 12.0 5 79.0 94 98.8 100 15.0 6* 93.5 99 116.8 125 18.0 3 56.8 89 71.0 80 12.0
240/1/60
4 73.5 96 91.8 100 16.0 5* 90.1 102 112.7 125 20.0 6 ————— 3 48.8 89 61.0 70 12.0 4 63.3 96 79.1 80 16.0 5 77.7 102 97.1 100 20.0 6 ————— 3 31.8 84 39.8 40 9.0 4 46.3 89 57.9 60 12.0 5 56.9 94 71.1 80 15.0
40UH200
(at 2000 Cfm)
277/1/60
3
/
4
208/3/60
6 56.9 99 71.1 80 18.0 3 35.7 89 44.6 45 12.0
240/3/60
4 52.4 96 65.5 70 16.0 5 64.6 102 80.8 90 20.0 6 64.6 108 80.8 90 24.0 3 16.9 89 21.1 25 12.0
460/3/60
4 25.2 96 31.5 35 16.0 5 31.3 102 39.1 40 20.0 6 31.3 108 39.1 40 24.0
LEGEND
DX — Direct Expansion FLA — Full Load Amps LAT — Leaving-Air Temperature at 70 F Entering-Air
Temperature
MCA — Unit Minimum Circuit Ampacity MOCP — Maximum Overcurrent Protection (Maximum Fuse Size
or Circuit Breaker Amps)
PSC — Permanent Split Capacitor
*Left hand coil connections only.
FLA
LAT
(F)
NOTES:
1. LAT (Leaving Air Temperature)(F) is measured at nominal cfm.
MCA MOCP
TOTAL
CAPACITY
(kW)
2. Water and DX coil used on electric heat units have left-hand coil connections.
3. Electric heat is available in the reheat position only and connec­tions are on the right side.
4. Face and bypass units are available with 3 heating elements only.
19
Page 20
Table 4 — Motor Data
PSC MOTORS
UNIT 40UV,UH SIZE MOTOR Hp VOLTAGE FLA MCA MOP (Amps)
1
050*
075
100
125
150
/
5
1
/
5
1
/
5
1
/
5
1
/
5
UNIT 40UV,UH SIZE MOTOR Hp VOLTAGE FLA MCA MOP (Amps)
050*
075
100
125
150
200†
1
/
3
1
/
3
1
/
3
1
/
2
1
/
2
3
/
4
LEGEND
ECM — Electronically Commutated Motor FLA — Full Load Amps MCA — Minimum Circuit Amps MOP — Maximum Overload Protection PSC — Permanent Split Capacitor
*Available in vertical configuration only.
†Available in horizontal configuration only.
115 3.7 4.6 8.3 15
208/230 2.0 2.5 4.5 15
265 1.6 2.0 3.6 15 115 3.7 4.6 8.3 15
208/230 2.0 2.5 4.5 15
265 1.6 2.0 3.6 15 115 3.7 4.6 8.3 15
208/230 2.0 2.5 4.5 15
265 1.6 2.0 3.6 15 115 3.7 4.6 8.3 15
208/230 2.0 2.5 4.5 15
265 1.6 2.0 3.6 15 115 3.7 4.6 8.3 15
208/230 2.0 2.5 4.5 15
265 1.6 2.0 3.6 15
ECM
115 1.4 1.8 3.1 15
208/230 1.3 1.6 2.9 15
265 1.1 1.4 2.6 15 115 3.7 4.6 8.3 15
208/230 2.3 2.9 5.1 15
265 2.0 2.5 4.5 15 115 4.0 5.0 9.1 15
208/230 2.6 3.2 5.8 15
265 2.3 2.9 5.1 15 115 4.7 5.9 10.6 15
208/230 3.3 4.1 7.4 15
265 2.9 3.6 6.6 15 115 4.7 5.9 10.6 15
208/230 3.3 4.1 7.4 15
265 2.9 3.6 6.6 15 115 9.6 12.0 21.6 20
208/230 6.8 8.5 15.3 15
265 5.5 6.9 12.4 15
MAXFUSESIZE
(Amps)
MAXFUSESIZE
(Amps)
20
Page 21
ELCATPE
ROTOM NO
N
IP 61
C
SEE CONTROL DIAGRAM FOR HARNESS WIRING
1CBC
1
3
4
6
5
7
8
1
3
ER
1
4
21
5
1
1
ECM
9
2
5
4
ELCATPECER
ROT
N
IP
OM
5
N O
3
2
1
115/DER
115/DER
1NART
901/KLB
315/NRB
405/NRB
CAV 42
CAV021
111/THW
415/LEY
61
515/THW
515/THW
FFO
OTUA
2 W
S
415 /LE
Y
81
715/ULB
5/
5
/NRO
OIV
2CE/NRO
9 CE
/ UL
B
615/O
I V
T NOC
NRB
5CE/
LE Y
HGIH
XAM
DEM
DRAOB DEEPS
WOL
3 ETON EES
caV4
2
9C
2C
21C
E/ULB
E
/N
E/
R O
DER
THW
N
K L
R
B
G
R
ERIW 3
ELBAC
E W
O P
9 01
KLB / K LB
11 1
1WS
2 0 1
/K LB
1 U F
1 0 1
/K LB
1CSID
001/KLB
1L
/TH
W
01 1
/THW
SERIW YLPPUS REPPOC ESU
011 /
THW
N R G
D
N
V 511
NG
LEGEND
21
pliance with national and local electrical codes.
are for field use with increased ESP.
1. Make electrical installation in accordance with job diagram, and in com-
2. Low limit thermostat (LLT) is installed on all units with water coils.
NOTES:
3. Wire YEL/EC5 factory connected to LOW. Positions MED, HIGH, MAX
Fig. 8A — Unit Ventilator Wiring with CCN Controls — Control Box (115 vac)
Harness Connection
Connection Point Splice
Splice Terminal Connection
Component Tie Point
Optional Wiring
Factory Wiring
Chassis Ground
Earth Ground
DISC — Disconnect Switch
ECM — Electronically Commutated Motor
ESP — External Static Pressure
FU — Fuse
GND — Ground
LLT — Water Coil Low Limit Thermostat
SW — Switch
TRAN — Transformer
Page 22
RED
TB2
Sensor
Relative
SEN
SET
w/Setpoint Adjust.
Optional Wall Mount
BLK
NOTE 1 NOTE 1
RAT
BLU
BLU
Space Temp. Sensor
WHT
NOTE 2
SAT
BLK
OAT
MAT
BLK
RED
BLK
RED
RED
BLK
WHT
Field Supplied -
AIR
(Field Installed)
Humidity
(Optional)
RED
WHT
WHTBLK
499 ohm
Dedicated 24 VAC
SENSOR
QUALITY
BLK
WHT
SWITCH
ENTHALPY
Field Supplied/
Installed options
NOTE 2
VIO
RED
DETECTOR
OCC/UNOCC
ORNORN
FIRE/SMOKE
24
BLK/21
RED/FSD
NOTE 5
BRN
T1T2T3T4T5T6T7T8T9
SAT
SPT
J1
Power
3
BRN
GRN
CBC3
J4
1
23
RED
RED
BRN
RED
1
OAT
MAT
Service
J3
CCN
312
YEL
4
ORN/3
321
LL
T10
T11
T12
T13
T14
T15
T16
AQ
Spare AI
SPT AD J
T26 24 Vdc
RED
YEL6YEL
3
CBC2
BLU/1
V1C
RH/Spare
Cooling
Output
T29
T30
T28
YEL
BLU
RED
RED
ORN
ORN
YEL
BLU
7
8
1234567891011
CBC2
BLU
VIO/2
BLU/1
ORN/3
BLU
RED
BRN
VIO
234
1
SFS T17
unused T18
OA Enth T19
Heating
Output
T32
T33
T31
RED
4
VIO
RED
RED
V2C
T34
VIO
RED
WHT
WHT
VIO
5
11
YEL
BLK
GRA
ORN
ORN
YEL
BLK
GRA
4
5
2
361
OA
RED
WHT
BRN
R S/S T20
Damper
Output
T35
BLK
RED
BLK
12
BLK
LTT T22
FSD T21
Spare DI T24
CHGOVR T23
Heating
Enable
T38
T37
T36
12
BLK
RED
WHT
123
OAC
NO
NC
Common T25
K2 K1
NO
NC
Cooling
Enable
T39
K3
NO
NC
ORN/38ORN
8
CBC3
123456789
CBC3
BLK
RED
RED
BRN
4
BLK
5
123456789
CBC1
WHT/35WHT
VIO VIO VIO
BLK
VIO VIO/36
BLU BLU/37
6
YEL
BRN
WHT
BRN
YEL
WHT
BLK
RED
5
1
7
VIO
BLU
BLU
VIO
2
CBC2
GRA
ORN
ORN
GRA
RESISTOR HARNESS
V1C
1000 ohm
RED
1
1
G0-24V
234
234
BLU
Y2-OPN
VIO/2
1000 ohm
VIO
BRN
Y1-CLS
Detail A - STEAM VALVE WIRING
G-COM
NOTE 3
BLU
RED
24 V
See Detail A for
Steam Valve Wiring.
LEGEND
OPEN
AQ — Air Quality
VIO
BRN
CLOSE
CCN — Carrier Comfort Network®
CGOVR — Changeover
COM
NOTE 3
HW VALVE
COM — Common
CW — Chilled Water
ECM — Electronically
BLK
RED
ORN
YEL
RED
BRN
24 V
COM
OPEN
CLOSE
CW VALVE
NOTE 3
Commutated Motor
GRN
WHT
24 V (hot)
24 V
COM
OPEN
CLOSE
AIR DAMPER
OUTDOOR
Recirculation Only Units.
OA damper not installed on
Adjustment
Harness Connection
Connection Point Splice
24 V (gnd)
Splice Terminal Connection
Component Tie Point
ECM
ECM
SW2-CO M
SW2-AUTO
SW2-CONT
Optional Wiring
Factory Wiring
NOTE 4
FROM CONTROL BOX
Chassis Ground
Earth Ground
NOTES:
the factory-supplied return air sensor and wire as shown.
1. When factory installed, optional wall-mount space sensor is wired to provide set point adjustment only. When remote sensor installation is field required, disconnect
2. Use shielded wire when field installing these parts. Connect the drain wire to the unit chassis and insulate the sensor end. Factory wiring consists of unshielded wire.
3. Hot water (HW) valve opens on loss of power. Chilled Water (CW) valve closes on loss of power.
Fig. 8B — Unit Ventilator Wiring with CCN Controls — Control Diagram (115 vac)
4. See power diagram for CBC1 wiring.
5. Wire RED/FSD factory wired to TB2. When field installing a fire/smoke detector, remove RED/FSD from TB2 and wire as shown.
— Occupied/Unoccupied
GND — Ground
HW — Hot Water
LL — Low Limit Device
MAT — Mixed Air Temperature
NC — Normally Closed
NO — Normally Open
OA — Outdoor Air
OAT — Outdoor Air Temperature
OCC/
UNOCC
RAT — Return Air Temperature
RH — Relative Humdity
SAT — Supply Air Temperature
SPT — Space Temperature
SPT ADJ — Space Temperature
22
Page 23
Make Duct Connections — If applicable, install all
ductwork to and from unit in accordance with all applicable codes. Duct construction must allow unit to operate within duct external static pressure limits as shown on job submittals and in Tables 5 and 6. Duct opening should be the same size as the unit. For units ducted to multiple openings, make sure there is adequate straight duct, as shown below, immediately after the unit.
40UH 075 100 125 150 200
Minimum Straight Duct Required (Length in ft)
Units designed to operate with ductwork may be damaged if operated without intended ductwork attached.
Ensure that units ducted to multiple openings have sufficient straight duct immediately after the unit.
FACTORY SETTINGS — CHILLED WATER COIL APPLICATIONS
Unit Speed
40UV050
40UV,UH075
40UV,UH100
40UV,UH125
40UV,UH150
45 52 58 63 75
Table 5 — Unit Ventilator Airflow — PSC Motor*
1-Row 2-Row 3-Row 4-Row 5-Row 6-Row 7-Row
Max 522 510 497 485 490 489 457
High 503 490 476 464 473 476 444
Low 458 449 440 425 452 455 430 Max 806 778 750 747 766 732 697
High 682 664 645 629 621 596 570
Low 569 554 539 527 533 514 495 Max 1064 1033 1001 1013 973 980 967
High 662 659 655 642 763 740 717
Low 530 519 507 503 498 501 504 Max 1295 1285 1215 1218 1239 1250 1175
High 899 930 876 865 852 846 846
Low 568 616 597 570 568 558 573 Max 1542 1480 1500 1484 1468 1482 1374
High 1071 1068 1065 1034 1033 1031 1013
Low 812 801 790 881 848 842 799
Units provided with outside air must utilize the low-
temperature safety switch to prevent coil freeze-up.
Insulate all ductwork as required. Use flexible connections to minimize duct-to-unit alignment problems and noise trans­mission where specified.
Install ductwork, grilles, and plenums so that they do not restrict access to filter.
Cut openings for supply and return air grilles, thermostats, and switch plates where specified on job drawings. Be careful not to cut wires, piping, or structural supports. Use a steel ther­mostat shield ring to protect drywall from thermostat wiring where applicable.
Prevent dust and debris from settling in unit. If wall finish or color is to be applied by spraying, cover all openings to prevent spray from entering unit.
Approximate Air Delivery (Cfm)
FACTORY SETTINGS — ELECTRIC HEAT/DX COIL APPLICATIONS
Unit Speed
40UV050
40UV,UH075
40UV,UH100
40UV,UH125
40UV,UH150
LEGEND
CX — Chilled Water Applications DX — Direct Expansion HW — Hot Water
*Standard on sizes 050-150.
Max 522 510 497 485 490 489 457
High 503 490 476 464 452 455 430
Low 458 449 440 425 410 414 406 Max 806 778 750 747 766 732 697
High 682 664 645 629 621 596 570
Low 569 554 539 527 533 514 495 Max 1064 1033 1001 1013 973 980 967
High 794 788 782 773 857 834 810
Low 662 659 655 642 628 620 611 Max 1295 1285 1215 1218 1239 1250 1175
High 1055 1040 1024 995 1099 1091 1052
Low 738 767 732 719 987 986 964 Max 1542 1480 1500 1484 1468 1482 1374
High 1285 1257 1229 1248 1246 1239 1199
Low 934 928 922 901 1033 1031 1013
1-Row 2-Row 3-Row 4-Row 5-Row 6-Row 7-Row
Approximate Air Delivery (Cfm)
NOTE: Use the table below to determine the heating and cooling coil combinations available with PSC Motor operation.
COOLING COIL
5RowsCW 1 or 2 rows N/A 3 elements 4RowsCW 3 rows 1 or 2 rows 4 elements
3RowsCWorDX† 4rows 1or2rows 5or6elements
†DX cooling applications are only available in 3-row cooling
configurations.
HW Steam Electric
HEATING COIL
23
Page 24
Table 6 — Unit Ventilator Airflow — ECM Airflow
UNIT SIZE
40UV050
40UV,UH075
40UV,UH100
40UV,UH125
40UV,UH150
40UH200
3-4EH/DX — Direct Expansion Coil Applications with 3 to
5-6EH — 5 to 6 Elements of Electric Heat CW — Chilled Water Applications ESP — External Static Pressure
MOTOR
HP
1
/
3
1
/
3
1
/
3
1
/
2
1
/
2
3
/
4
LEGEND
4 Elements of Electric Heat
COIL TYPE
3-4EH/DX 499 419 336 — — — — — — — — —
3-4EH/DX 747 644 498 753 609 472 752 612 470 751 618 498
3-4EH/DX 997 853 615 987 850 639 1012 823 626 994 819 618
3-4EH/DX 1266 1023 769 1239 1055 758 1235 1037 765 1231 1010 778
3-4EH/DX 1503 1246 956 1479 1216 965 1494 1209 927 1486 1222 917
CW 499 336 248 — — — — — — — — —
5-6EH 491 380 324 — — — — — — — — —
CW 747 484 346 753 548 432 752 530 437 751 541 386
5-6EH 755 645 583 746 598 539 755 585 554 765 610 542
CW 997 703 505 987 693 543 1012 663 483 994 692 480
5-6EH 1016 819 719 1002 851 709 1024 798 787 1024 820 734
CW 1266 880 657 1239 905 609 1235 898 676 1231 898 627
5-6EH 1259 1049 897 1239 995 888 1226 995 888 1253 994 919
CW 1503 1033 775 1479 1046 712 1494 1020 770 1486 1075 737
5-6EH 1517 1222 1068 1490 1206 1087 1498 1159 1120 1503 1188 1074
ALL 2014 1384 1023 1981 1386 971 1965 1385 997 1814 1354 993
APPROXIMATE AIR DELIVERY (Cfm)
ESP Speed Board Position
Low Position
(0.0 in. wg)
Max High Low Max High Low Max High Low Max High Low
Med Position
(0.10 in. wg)
NOTES:
1. Factory default is Low Position.
2. Med, High, and Max positions are field settings.
High Position
(0.25 in. wg)
Max Position
(0.45 in. wg)
Make Final Preparations
1. Turn power off (lock out and tag electrical disconnect).
2. Install thermostats and perform any other final wiring as applicable.
3. Clean dirt, dust, and other construction debris from unit interior. Be sure to check fan wheel and housing.
4. Rotate fan wheel by hand to be sure it is free and does not rub on housing.
5. Be sure drain line is clear and is properly and securely positioned. Pour water into drain to check operation.
6. Vent all air from unit coil and related piping. If air vent is manual, release air from system by turning air vent screw
1
1
/2turns counterclockwise with screwdriver. When steady stream of water begins to escape, close valve. If air vent is automatic, trapped air will be vented automatical­ly. Vent releases air slowly, usually dripping water into drain pan in the process.
Make sure all service valves are open and that motorized control valves, if supplied, are set for automatic operation.
7. Check all control valves in the system for proper opera­tion in accordance with valve manufacturer’s instructions.
8. For units with factory-installed balancing valves, adjust as follows:
a. Butterfly valves — Turn valve gate by inserting
screwdriverintoslotinvalvetopandrotatingupto 90 degrees. Valve is fully open when slot is parallel with valve body. When slot is perpendicular to body, flow through valve is at minimum. Valve does not seal against flow.
b. Ball valves with lever handles — Valve gate action
is similar to butterfly valves above except that when handle is perpendicular to valve body, there is no flow through valve. Ball valves may be used as shutoff valves.
9. Install filter in frame at front of coil. If field-supplied filters are used, be sure size is correct. See Table 1 for filter data.
10. Ensure all panels and filters are installed before checking fan operation. Turn on unit power. Check fan and motor operation.
.
IMPORTANT: Do not start up or operate unit without filter and panels installed. Be sure filter and unit interior are clean.
PRODUCT INTEGRATED CONTROL
Physical Characteristics —
tion of factory-supplied and factory-installed sensors, switches, and devices (standard and optional). Tables 7-11 summarize the Unit Ventilator Comfort Control module offerings and accessory packages.
The control includes the electronic control board assembly, fuses, relay, transformer, terminal block, low-limit air tempera­ture protection (water coil units only), and other devices. A disconnect switch, located below the control box, is provided to shut off the power to the control box (see Fig. 10). See Tables 8 and 9 for factory-installed options and accessory packages.
Control environmental limitations are as follows:
Shipping Temperature -40 to 185 F Shipping Humidity 10 to 95% Operating Temperature 32 to 140 F OperatingHumidity 10to90%
The Unit Ventilator Comfort Control module is powered from the same source as the unit’s single source power connection.
Field wiring for accessories terminates in the control enclo­sure. Control accessory wiring requirements are 18 or 20 gage, 2 or 3 conductor twisted as specified. Refer to wiring details for more information. See Table 10 for control board terminal designations.
Carrier’s 40UV,UH unit ventilators with factory-installed controls are ETL listed and listed to UL standard 1995 for heat­ing and cooling equipment. All listings are for the complete unit and all factory-supplied accessories. Use of other accesso­ry components are not covered under these listings.
Figure 9 shows the loca-
24
Page 25
Table 7 — Standard Control Offerings
All control offerings provide the following features:
1. A 3-speed automatic fan control that minimizes fan noise by matching the fan speed to the load. This process provides better dehumidification during cooling and reduces energy consumption.
2. American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) Cycle I, Cycle II, or Cycle III damper con­trol options (Cycle II default).
3. Configurable minimum ventilation set point (cfm) for ASHRAE Cycle II or Cycle III damper control.
4. Demand controlled ventilation with optional sensor to meet ven­tilation requirements with improved efficiency.
5. Coil freeze protection on all units except non-water units.
6. Proportional Integrated Derivative (PID) logic heating, cooling and damper controls to maintain temperature.
7. Adjustable filter maintenance timer on all units.
8. Direct shaft coupled, electric actuators on all dampers. Spring return on outdoor-air (OA) damper.
9. Spring return modulating water valves.
10. Optional relative humidity sensor for high humidity control or dehumidification.
11. Optional remote-mounted space sensor with set point adjust­ment, tenant override, and service port jack.
12. Optional linkage thermostat with time clock, set point adjust­ment, schedule and holiday programming, digital temperature, set point and equipment status display.
CONTROL SEQUENCE APPLICATION
2A/3A Chilled Water/Hot Water, 2-Pipe Changeover 2B/3B Chilled Water/Hot Water or Steam, 4-Pipe 2D/3D Chilled Water with Electric Heat
2F/3F Hot Water or Steam Heating Only
2G/3G Hot Water or Steam with DX Cooling
2J/3J Chilled Water Cooling Only
20/30 Chilled Water/Hot Water, 2-Pipe Changeover 21/31 Chilled Water/Hot Water or Steam, 4-Pipe 22/32 Chilled Water with Electric Heat 23/33 Hot Water or Steam with DX Cooling 24/34 Hot Water or Steam Heating Only 25/35 Chilled Water Cooling Only
2M/3M F&B Chilled Water/Hot Water or Steam Heating 4-Pipe plus Valve Control Reheat for
2G/3G Cooling with Hot Water or Steam Reheat, Valve Control
2B/3B Chilled Water/Hot Water Reheat, 4-Pipe Valve Control 2K/3K F&B Chilled Water Cooling with Hot Water or Steam Valve Control Reheat, 4-Pipe
LEGEND
DX — Direct Expansion F&B — Face and Bypass
Heating/Cooling Valve Control
Heating/Cooling with Face and Bypass Damper Control
Heating/Cooling with Humidity Control
Dehumidification
OC Electric Heat Only OE Electric Heat with DX Cooling OH DX Cooling Only
Non-Water Systems
Table 8 — Field-Installed Accessories
PACKAGE NO. PACKAGE DESCRIPTION 33CSKITLST-01 Programmable Linkage Thermostat with Timeclock CGCDXSEN001A00 Wall-Mounted CO CGCDXSEN002A00 Wall-Mounted CO CGCDXGAS001A00 CO HL39ZZ003 Wall-Mounted Relative Humidity Sensor
DIGIT #15 (2,S,M,4,V) Space Temperature Sensor
DIGIT #15 (1,0,R,3) Changeover Switch
Sensor (No Display)
2
Sensor with Display
2
Sensor Calibration Service Kit
2
Table 9 — Factory-Installed Options
CODE DESCRIPTION
25
Page 26
ON
OFF
SERVICE
SWITCH
HI
LOW
MAX
FAN SPEED
SWITCH
DISCONNECT
SWITCH
MIXED AIR TEMPERATURE SENSOR
(UNIT FILTER REMOVED)
o r
S
a
1
b l
5
S
u
24V
(
2
2
y
A
.
e
5
S
C
l
)
(
A
3
CC
/
C
DC
O
W
M
b
)
l k
0
1
C
+
C
re
W
3
C
3
d
2
W
S2
V
5
A2W
0/60
2
+
b
w
y
4
M
S
h
V
Be a
H
1
A
t
3
d
.
H
5
e
l
1
C
C
i
F2
S3S
m
l
z
i
0
a
/
n
R
(
o
D
s
CW
TE
EG.
A S
s
C
S
94D
u
w
2
M
LI
)
t
3
2
i
o
P
t
N
EQUI
S
S
z
.
S1
m
5
I
EM
e
T
BJ
N
u
a
r
P
E
ppl
D
t
l
.
i
a
D
A
.
o
y
&
n
2
n
d
0
U
3
L
9
C
W
8
L
0
3
R
C
.
M
5
9
.
C
. 1
2
1
i
W
n
8
0
0
-l
s
0
b
M
(4 Nm)
R
FACE AND BYPASS
DAMPER ACTUATOR
(MAY BE LOCATED ON OPPOSITE
ELECTRIC HEAT
OVER TEMPERATURE
SAFETY (ELECTRIC HEAT ONLY) SWITCH
OUTDOOR AIR
END OF COMPARTMENT)
DAMPER ACTUATOR
1
L 9 I
R
S
4
E
D
T
5
G
E
D . E Q
U I
U L
ROOM-AIR TEMPERATURE
SENSOR
Fig. 9 — Typical Unit Ventilator Comfort Control Module Sensor, Switch, and Device Locations
H F
M
2 3
B J 0 4
n
0
~
R
~
~
CONTROL COMPARTMENT
LEGEND
OPTIONS SHOWN
WITH FACTORY-INSTALLED
DAMPER ACTUATOR(S)
RELATIVE
HUMIDITY
SENSOR
OPTION
(FIELD-
INSTALLED
ACCESSORY)
SPACE
TEMPERATURE
SENSOR
OPTION
(FACTORY-
INSTALLED
CONTROL
MODULE
OPTION)
ECM — Electronically Commutated Motor
LLT — Low-Limit Thermostat
26
Page 27
Table 10 — Control Board Terminal Designations
CONTROL BOARD
TERMINAL
T1 Space Temperature (+) T2 Space Temperature (Gnd) T3 Supply-Air Temperature (+) T4 Supply-Air Temperature (Gnd) T5 Mixed-Air Temperature (+) T6 Mixed-Air Temperature (Gnd) T7 Outdoor-Air Temperature (+) T8 Outdoor-Air Temperature (Gnd)
T9 Space Temperature Adjust (+) T10 Space Temperature Adjust (Gnd) T11 Not Used T12 Not Used T13 Air Quality (+) T14 Air Quality (Gnd) T15 Relative Humidity (+) T16 Relative Humidity (Gnd) T17 Fa n S tatus T18 Not Used T19 Outdoor Air Enthalpy T20 Remote Start/Stop
FUNCTION
CONTROL BOARD
TERMINAL
T21 Fire/Smoke Status T22 Freezestat T23 Changeover T24 Spare T25 Common/Ground T26 24 VDC (External Power Supply) T27 Not Available T28 Cooling First Stage or Valve Open T29 Cooling Common T30 Cooling Second Stage or Valve Close T31 Heating First Stage or Valve Open T32 Heating Common T33 Heating Second Stage or Valve Close T34 OAD Open T35 OAD Common T36 OAD Close T37 Heating Enable T38 Common T39 Cooling Enable
LEGEND
Gnd — Ground OAD — Outdoor-Air Damper
FUNCTION
ON
OFF
MAX
HI
LOW
Fig. 10 — Control Switch Location
Unit Ventilator Comfort Control Module Instal­lation and Field Wiring —
installed and factory-wired within the control compartment. The Unit Ventilator Comfort Control module contains the soft­ware and microprocessor that operates the unit. It continuously monitors inputs and controls outputs such as the fan cooling and heating coil valves and dampers. Refer to Fig. 11 for wiring diagram connections between the unit’s sensors and actuators and the control module. Direct expansion cooling and/or electric heat stage control are also provided.
The module is factory-
27
Page 28
321
J1 POWER
J4 SERVICE CONNECTOR
321
J3 CCN
T26
24Vdc
T28
T29
COOLING
T31
T32
T35
T38
K3
HI/MED
OUTPUT
HEATING OUTPUT
MIXED AIR DAMPER OUTPUT
HEATING ENABLE
COOLING ENABLE
T30
T33
T34
T36
T37
T39
FAN SPEED
ANALOG SENSOR INPUT
DISCRETE SWITCH INPUTS
K2
MED/LO
FAN SPEED
SPT/RAT
SAT
MAT
OAT
SPT ADJ
AQ
RH
FAN STATUS
OA ENTH
REMOTE
S/S
FIRE SMOKE
LOW LIMIT
CHANGEOVER
SPARE
COMMON GND
K1
FAN ON/OFF
T2
T4
T6
T8
T10
T12
T14
T16
T18
T20
T22
T24
T1
T11
T13
T15
T17
T19
T21
T23
T25
T3
T5
T7
T9
ENT
SPT
OPTIONAL WALL SENSOR
RAT
SAT
MAT
OAT
TB
NO
NC COM NO
NC
COM
NO NC
COM
LEGEND
ADJ — Adjust AQ — Air Quality CCN — Carrier Comfort Network® Controls COM — Common ENT — Enthalpy Sensor GND — Ground MAT — Mixed-Air Temperature Sensor OA EN TH — Outdoor-Air Enthalpy
OAT —
NOTE: Only one SPT sensor can be used. If wall-mounted sensor option is used, unit-mounted sensor wire to terminal T1 must be removed.
Outdoor-Air Temperature Sensor
NC — Normally Closed NO — Normally Open RAT — Return-Air Temperature Sensor S/S — Start/Stop SAT — Supply-Air Temperature Sensor SPT — Space Temperature Sensor RH — Relative Humidity TB — Terminal Block
Fig. 11 — Unit Ventilator Comfort Control Module with Sensor Connections
28
Page 29
Sensors
ROOM-AIR TEMPERATURE (RAT) SENSOR — The RAT sensor is factory-installed and factory-wired to the control. It measures the temperature of the air returning to the unit from the space.
The sensor consists of a thermistor, encased within an epoxy bead. See Fig. 12. It is mounted behind the front center panel, where it is hidden from view.
The sensor has a range of –40 to 245 F with a nominal resistance of 10,000 ohms at 77 F. The sensor is connected to terminals T1 and T2 on the controller board. See Table 11. Polarity is not a consideration. See Table 10 for resistance vs temperature values.
SUPPLY-AIR TEMPERATURE (SAT) SENSOR — The SAT is factory-installed and factory-wired to the control module. It measures the temperature of the air leaving the unit.
The sensor consists of a thermistor encased within an epoxy bead. It is mounted in the fan discharge with the probe mount­ed to sense the air temperature supplied to the room. See Fig. 12.
The sensor’s thermistor has a range of –40 to 245 F with a nominal resistance of 10,000 ohms at 77 F.
NOTE: A temperature of the supply air includes fan heat.
In the control box, the sensor wires are connected to termi­nals T3 and T4 (SAT) on the controller board (see Table 11). Polarity is not a consideration. See Table 12 for resistance vs temperature values.
Fig. 12 — Room-Air Temperature and Supply-Air
Temperature Sensor (Part No. HN79NZ005)
Table 11 — Sensor Connections
SENSOR
Unit Mounted Room-Air Temperature Sensor (RAT)
Space Temperature Sensor (SPT) Wall Mount (Option)
Supply-Air Temperature (SAT) T3 and T4 Mixed-Air Temperature Sensor (MAT) T5 and T6 Outdoor-Air Temperature Sensor (OAT) T7 and T8
CONTROL
MODULE
PIN NO.
T1 and T2
T1, T9, T10, Shield
Table 12 — Thermistor Resistance vs Temperature Values for Room-Air Temperature Sensor,
Supply-Air Temperature Sensor, Mixed-Air Temperature Sensor,
and Optional Space Temperature Sensor
TEMP
(C) –40 –40 335,651 –35 –31 242,195 –30 –22 176,683 –25 –13 130,243 –20 –4 96,974 –15 5 72,895 –10 14 55,298
–5 23 42,315
03232,651
54125,395 10 50 19,903 15 59 15,714 20 68 12,494 25 77 10,000 30 86 8,056 35 95 6,530 40 104 5,325 45 113 4,367 50 122 3,601 55 131 2,985 60 140 2,487 65 149 2,082 70 158 1,752
TEMP
(F)
RESISTANCE
(Ohms)
29
Page 30
OUTDOOR-AIR TEMPERATURE (OAT) SENSOR — The OAT sensor is factory-installed and factory-wired to the con­trol. The OAT sensor monitors the temperature of the outside air entering the unit. See Fig. 13.
The sensor is installed immediately upstream from the outdoor-air damper where it will accurately sense the tempera­ture of the outdoor air entering the mixing box. The sensor con­nects to the control module T7 and T8 (OAT) as shown in Table 11.
The thermistor has a range of –40 to 245 F and a resistance of 5,000 ohms at 77 F. See Table 13 for thermistor resistance according to temperature value.
MIXED-AIR TEMPERATURE (MAT) SENSOR — The mixed-air temperature (MAT) sensor is factory-supplied, factory-installed, and factory-wired with each unit. The MAT measures the temperature of air in the mixing plenum area.
The MAT connects to terminals T5 and T6 on the con­trol module using
1
/4-in. female quick connect terminals. See
Table 11.
The sensor uses multiple thermistor elements. This sensor provides both mechanical and electrical averaging to achieve an accurate, average temperature measurement over the entire element length. Polarity is not a consideration. See Table 12 for resistance vs temperature values. The sensor is installed in the mixing plenum before the filter so it can sense the average air temperature. See Fig. 14.
The MAT has range of –40 to 245 F with a nominal resis­tance of 10,000 ohms at 77 F.
LOW-LIMIT THERMOSTAT — The low-limit thermostat (LLT) is factory-installed and factory-wired on all units with water coils. The thermostat is used to protect the water coils from freezing temperatures in the event of a malfunction by detecting the status of a potentially damaging condition.
The LLT is a 12-ft capillary tube mounted in the air stream. See Fig. 15.
The LLT provides a SPDT contact. The contact provides a sensor status indication to the control module and an electrical interlock to the fan and water valves. Upon detection of a fault condition, the unit ventilator will stop the fan, close the outdoor-air damper, and position water valves as specified in the sequence of operation. The LLT is factory set to trip at 38 F. The temperature setting is non-adjustable. The switch will automatically reset and restart the fan after its temperature has risenbyatleast5°F.
Table 13 — Thermistor Resistance vs Temperature
Values for Outdoor-Air Temperature Sensor
RESISTANCE
(Ohms)
168,250.0 –40 121,350.0 –31
88,500.0 –22 65,200.0 –13 48,535.0 –4 36,476.0 5 27,665.0 14 21,165.0 23 16,325.0 32 12,695.0 41
9,950.0 50 6,245.0 68 5,000.0 77 4,028.5 86 3,265.0 95 2,663.3 104 2,185.0 113 1,801.5 122 1,493.0 131 1,244.0 140 1,041.5 149
876.0 158
739.5 167
627.5 176
TEMPERATURE
(F)
The LLT is designed to trip if any 1-ft section of the capil­lary tube senses cold air at or below the thermostat setting. The temperature must exceed 43 F for the thermostat to automati­cally reset to restore the circuit to normal operation.
REFRIGERANT LOW-LIMIT THERMOSTAT — The re­frigerant low limit thermostat (LLR) is factory-installed and factory-wired on all units with direct expansion coils. The ther­mostat is used to protect the water coils from freezing tempera­tures in the event of a malfunction by detecting the status of a potentially damaging condition.
The LLR is a 18 in. capillary tube mounted in the air stream. See Fig. 15.
The LLR provides a SPDT contact. The normally closed contact is connected in series with the direct expansion relay coil, such that the DX (direct expansion) control relay is deenergized in a fault condition. The LLR is factory set to trip at 28 F. The temperature setting is non-adjustable. The switch will automatically reset and allow direct expansion relay opera­tion when the temperature has risen by at least 5° F.
Fig. 13 — Outdoor-Air Temperature Sensor
(Part No. HH79NZ055)
MIXED-AIR TEMPERATURE SENSOR
Fig. 14 — Mixed-Air Temperature Sensor Installed
in Mixing Plenum (Part No. HH79NZ075)
Fig. 15 — Low-Limit Thermostat
30
Page 31
The LLR is designed to trip if any 1-ft section of the capital­ly tube senses cold air below the LLR set point. The tempera­ture must exceed 33 F for the LLR to automatically reset to restore normal operations.
SPACE TEMPERATURE SENSOR (Factory-Installed Option) — The space temperature sensor is used to measure the building interior temperature. See Fig. 16.
The sensor is shipped with the unit, factory-wired and factory-mounted in the control swing panel inside the left hand compartment.
If remote temperature sensing is required, then the sensor may be removed and mounted on an internal wall where temperature sensed is representative of the entire zone to be serviced by the unit. The sensor wall plate accommodates the National Electrical Manufacturers Association (NEMA) standard 2 x 4 junction box. The sensor can be mounted direct­ly on the wall surface if acceptable by local codes.
Do not mount the sensor in drafty locations (such as near air-conditioning or heating ducts), over heat sources (such as baseboard heaters or radiators), or directly above wall-mounted lighting dimmers. Do not mount the sensor near a window which may be opened, near a wall corner, or near a door. Sensors mounted in these areas will have inaccurate and erratic sensor readings.
The sensor should be mounted approximately 5 ft from the floor, in an area representing the average temperature in the space. Allow at least 4 ft between the sensor and any corner and mount the sensor at least 2 ft from an open doorway.
Install the sensor as follows (see Fig. 17):
1. Locate the two Allen head screws at the bottom of the sensor.
2. Turn the two screws clockwise to release the cover from the sensor wall mounting plate.
3. Lift the cover from the bottom and then release it from the top fasteners.
4. Feed the wires from the electrical box through the open­ing in the center of the sensor mounting plate.
5. Usingtwono.6-32x1mounting screws (provided with the sensor), secure the sensor to the electrical box.
6. Use a three-conductor 20 gage shielded cable. The wire is suitable for distances of up to 500 ft. The standard CCN (Carrier Comfort Network®) communication cable may be used. If the set point adjustment (slide-bar) is not re­quired, then an unshielded, 18 or 20 gage, two-conductor, twisted pair cable may be used.
The CCN network service jack requires a separate, shielded three-conductor CCN communication cable. Always use separate cables for CCN communica­tion and sensor wiring. (Refer to Fig. 18 for wire designations.)
7. Replace the cover by inserting the cover at the top of the mounting plate first, then swing the cover down over the lower portion. Rotate the two Allen head screws counter­clockwise until the cover is secured to the mounting plate and locked in position.
For more sensor information see Table 12 for thermistor
resistance vs temperature values. NOTE: Clean sensor with damp cloth only. Do not use
solvents.
Cool
Warm
Fig. 16 — Space Temperature Sensor
(P/N HH51BX005)
NOTE: Dimensions are in inches.
Fig. 17 — Space Temperature Sensor and
Wall-Mounted Humidity Sensor Mounting
31
Page 32
WIRING THE SPACE TEMPERATURE SENSOR AND SET POINT ADJUSTMENT — To wire the sensor and slidebar, perform the following (see Fig. 18):
1. Identify which cable is intended for sensor wiring.
2. Strip back the jacket from the cables at least 3 inches.
1
Strip
/4-in. of insulation from each conductor. Cut the
shield and drain wire from the sensor end of the cable.
3. Connect the sensor cable as follows: a. Install a jumper between the two center terminals
(SEN and SET).
b. Remove the existing factory-connected wire on
terminal T1 of the control module.
c. Connect one wire from the cable (RED) to the T1
terminal on the controller. Connect the other end of the wire to the SEN terminal without the jumper wire.
d. Connect another wire from the cable (BLACK)to
the T10 terminal on the controller. Connect the other end of the wire to the remaining jumpered SEN terminal.
e. Connect the remaining wire (WHITE/CLR) to the
T9 terminal on the controller. Connect the other end if the wire to the remaining open terminal on the SET terminal block.
f. In the control box, install a no. 6 ring type crimp
lug on the shield drain wire. Install this lug under the mounting screw in the upper right corner of the controller (just above terminal T1).
WIRING THE CCN NETWORK COMMUNICATION SERVICE JACK — To wire the service jack, perform the following:
1. Strip back the jacket from the CCN communication ca­ble(s) for at least 3 inches. Strip
1
/4-in. of insulation from each conductor. Remove the shield and separate the drain wire from the cable. Twist together all the shield drain wires and fasten them together using a closed end crimp lug or a wire nut. Tape off any exposed bare wire to pre­vent shorting.
2. Connect the CCN + signal wire(s) (RED) to Terminal 5.
3. Connect the CCN – signal wire(s) (BLACK)toTer­minal 2.
4. Connect the CCN GND signal wire(s) (WHITE/CLR) to Terminal 4. Before wiring the RJ11 plug refer to Carrier Comfort Network® Interface, page 38 for communica­tion bus wiring and cable selection. The cable selected must be identical to the CCN communication bus wire used for the entire network.
The other end of the communication bus cable must be connected to the remainder of the CCN communica­tion bus. If the cable is installed as a T-tap into the bus, the cable length cannot exceed 100 ft. Wire the CCN service jack of the sensor in a daisy chain arrangement with other equipment. Refer to Carrier Comfort Network Interface section, page 38 for more details.
LINKAGE THERMOSTAT (Field-Installed Accessory) — The linkage thermostat can be used to control multiple units (up to 8 different sizes and types) from a single thermostat, provide occupancy scheduling for any number of units (all operating on the same schedule), and broadcast the changeover
switch status (2-pipe systems) to all units in the system (Fig. 19). The thermostat is equipped with two liquid crystal displays (LCD). One LCD is used to display the set points, space temperature, unit operating mode (Heating, Cooling, Off, etc.), and discharge air temperature from the unit. The second LCD displays the time and day of the week. The thermostat has pushbutton keys to enter the temperature set points, program the occupancy schedule, program holidays, set time, day, and date, and configure the functionality of the device.
When the thermostat provides local occupancy and set point scheduling for these units, it provides a Temperature Compen­sated Start feature which starts the unit(s) prior to the scheduled occupied time in order for the space to achieve the occupied set point temperature at the occupied time.
The thermostat uses CCN communications to provide the required information exchange between the thermostat and the unit’s controls.
The thermostat can be used to provide global occupancy scheduling for any number of units when a CCN user interface is not provided. In this mode, a 3-wire communication bus connected between each unit and the thermostat allows a user to program and change equipment occupancy scheduling and holidays from a single location without requiring the use of a personal computer. This allows any number of unit ventilators equipped with the Unit Ventilator Comfort Control module to operate to a common occupancy schedule (all controllers must be connected to a single CCN communication bus). Each Unit Ventilator Comfort Control module will use its own set points and space temperature settings.
The linkage thermostat can broadcast the value of an equip­ment status point to all units connected to the communication bus. The point name must be configured using a CCN Service Tool at installation. A typical example is to broadcast the status of the changeover switch (2-pipe systems) or a field-supplied and field-installed outdoor-air enthalpy sensor from the one unit where the sensor is installed to all other units. This action reduces the installation cost and operating maintenance of the entire system.
When used to provide Global Occupancy Scheduling or Broadcast, the thermostat does NOT need to be mounted in any specific space. The thermostat can be mounted anywhere in a conditioned area as long it is connected to the CCN communi­cation bus.
The linkage feature allows several units to operate from a single common thermostat. This feature can be used if multiple units serve a single common area. The thermostat must be mounted in the common area space for this feature.
Thermostat Mounting Location
— DO NOT mount the sen­sor in drafty locations (such as near air conditioning or heating ducts), over heat sources (such as baseboard heaters or radia­tors), or directly above wall mounted-lighting dimmers. DO NOT mount the sensor near a window which may be opened, near a wall corner, or near a door.
Sensors mounted in these areas will have inaccurate and erratic sensor readings. The sensor should be mounted approxi­mately 5 ft from the floor, in an area representing the average temperature in the space. Allow at least 4 ft between the sensor and any corner and mount the sensor at least 2 ft from an open doorway. Follow the mounting and wiring instructions includ­ed with the thermostat for proper thermostat installation.
32
Page 33
6
RED (+)
SENSOR PC
3
4
5
WHT (GND)
2
BLK (-)
1
BOARD
OVERRIDE
PUSHBUTTON
CCN SERVICE CONNECTOR
CCN CABLE
SENSOR CABLE
WHT (SW)
WIRE ACCESS HOLE
RED (TH)
BLK (COM)
SET
JUMPER TERMINALS AS SHOWN
SEN
LEGEND
CCN — Carrier Comfort Network® COM — Common GND — Ground
SET POINT
ADJUSTMENT
THERMISTOR TEMPERATURE SENSOR
Fig. 18 — Space Temperature Sensor Wiring
33
Page 34
COOL
HEAT
Table 15 — Indoor Air Quality Sensor Accessories
CO2SENSOR ACCESSORY
PA RT N U MB ER S CGCDXSEN001A00 Wall Mount Sensor (No Display) CGCDXSEN002A00 Wall Mount Sensor with Display CGCDXGAS001A00 Sensor Calibration Service Kit
DESCRIPTION
Carrier
®
Fig. 19 — Linkage Thermostat
Thermostat Power Supply
— The thermostat power supply, included in the accessory package, provides the required DC voltage to operate the thermostat. The power supply includes 24 vac (Class II) transformer.
The transformer and power supply can be mounted within
the unit’s control enclosure.
Wiring between the thermostat and the power supply is limited to 100 ft maximum. If longer distances are required, the power supply and transformer must be remotely mounted closer to the thermostat. Be sure to follow all code require­ments when remotely mounting the transformer as the primary wiring is Class I circuit type. The thermostat power wiring requires the use of a 2-conductor, 18 AWG, twisted pair cable to connect the power supply output terminals to the thermostat. Follow the installation instructions shipped with the thermostat for proper installation.
Thermostat Communication Wiring
— The thermostat uses CCN network communications to exchange data between the thermostat and the equipment control or the CCN network for system functions. Use 3-conductor, 20 AWG (American Wire Gage) minimum, shielded cable as specified in the Carrier Comfort Network® Interface section. See Table 14.
Thermostat Remote Room Sensor Option
—Theinstaller has the option of mounting the thermostat in a mechanical closet or other location in order to limit access to the device. A remote sensor option can be installed in the space to properly sense temperature at the occupied location. Refer to the instal­lation instructions shipped with the thermostat for additional information on this option.
Table 14 — CCN Cable Requirements
MANUFACTURER CABLE NO.
Alpha 2413 or 5463
American A22503
Belden 8772
Columbia 02525
The CO
sensors in Table 15 are all factory set for a range of
2
0 to 2000 ppm and a linear voltage output of 2 to 10 vdc. Fig. 21 shows ventilation rates for various CO2set points when a typical CO tions supplied with the CO
level of 350 ppm is used. Refer to the instruc-
2
sensor for electrical requirements
2
and terminal locations. A separate isolated field-supplied trans­former is required to provide power to the sensor.
Any changes to the factory configuration of the sensor require use of the User Interface Program (UIP), which is included in the sensor calibration service kit.
The sensor must be properly located to accurately measure the air quality of the occupied space. It should be mounted in a location that will avoid direct breath contact.
Do not mount the sensor in drafty areas such as near the unit discharge, open windows, fans, or over heat sources. Allow at least 3 ft between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if supply air is blown directly onto the sensor.
5.625 (14.3)
3.25 (8.3)
NOTE: Dimensions are in inches. Dimensions in ()are in centimeters.
1.125 (2.9)
5
(12.7)
0.25 (0.8)
Fig. 20 — Indoor Air Quality (CO2) Sensor
(PN 33ZCSENCO2)
INDOOR AIR QUALITY (IAQ) SENSOR (Field-Installed Accessory) — The wall-mounted sensor monitors CO conditioned air space, and uses infrared technology to detect the levels of CO
present in the air. See Fig. 20. This informa-
2
tion is used to modify the position of the outdoor-air dampers to admit more outdoor air as required to provide the desired ventilation rate. The sensor is available with or without an LCD readout to display the CO
level in ppm. Sensor acces-
2
sory descriptions and part numbers are shown in Table 15. To mount the sensor, refer to the installation instructions shipped with the accessory kit.
in the
2
34
Fig. 21 — Ventilation Rates Based on
CO
Set Point
2
Page 35
Air Quality Sensor Wiring
— To wire the sensor after it has been mounted in the conditioned space, see Fig. 22 and the installation instructions shipped with the sensor. For each sensor, use 2-conductor 18 AWG twisted-pair cables (unshielded) to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals.
To connect the sensor to the control board, identify the positive (+) and negative (–) output terminals to the sensor terminal block and connect the positive terminal to terminal
T13. Connect the negative terminal to terminal T14 on the control board. Mount a field-supplied Class II, 24 vac trans­former with a 40 va rating in a suitable location inside the unit’s control box. Wire the transformer primary to line voltage power after any fuses and disconnect switches. Ensure the transformer primary voltage rating matches the unit’s voltage rating. Refer to the wire label diagram shipped with the unit. Connect one of the transformer secondary leads to the 24 vac power terminal of the sensor. Connect the remaining secondary lead to the ground terminal sensor.
321
J1 POWER
J4 SERVICE CONNECTOR
321
J3 CCN
T26
24Vdc
T28
T29
COOLING
T32
T35
T38
K3
HI/MED
OUTPUT
HEATING OUTPUT
MIXED AIR DAMPER OUTPUT
HEATING ENABLE
COOLING ENABLE
T30
T31
T33
T34
T36
T37
T39
FAN SPEED
ANALOG SENSOR INPUTS
DISCRETE SWITCH INPUTS
K2
MED/LO
FAN SPEED
SPT/RAT
SAT
MAT
OAT
SPT ADJ
AQ
RH
FAN STATUS
OA ENTH
REMOTE
S/S
FIRE SMOKE
LOW LIMIT
CHANGE OVER
SPARE
COMMON GND
K1
FAN ON/OFF
T2
T4
T6
T8
T10
T12
T14
T16
T18
T20
T22
T24
T1
T3
T5
T7
T9
T11
T13
T15
T17
T19
T21
T23
T25
+
AQ
-
FIELD SUPPLIED ISOLATED 24VAC POWER SOURCE
NO
NC COM NO
ADJ — Adjust AQ — Air Quality CCN — Carrier Comfort Network® COM — Common GND — Ground MAT — Mixed-Air Temperature Sensor OA EN TH — Outdoor-Air Enthalpy OAT — Outdoor-Air Temperature Sensor
COM
NC
NO NC
COM
LEGEND
NC — Normally Closed NO — Normally Open RAT — Return-Air Temperature Sensor S/S — Start/Stop SAT — Supply-Air Temperature Sensor SPT — Space Temperature Sensor RH — Relative Humidity
Fig. 22 — Air Quality Sensor Wiring
35
Page 36
RELATIVE HUMIDITY SENSOR (Field-Installed Acces­sory) — The relative humidity (RH) sensor is used to measure the relative humidity of the air within the occupied space. The sensor is ordered separately from the unit, is field-installed and should be wired in the control compartment below the control module. It may be mounted directly on an interior wall if acceptable by local codes. See Fig. 23.
The sensor uses bulk polymer resistance technology, which eliminates the effect of surface contamination and helps to maintain sensor accuracy over a long period of time. It has a long-term stability of less than 1% drift per year.
The relative humidity sensor has a range of 10 to 90% with an accuracy of ±3% at 77 F. It generates a 2 to 10 vdc signal which is sent to the controller.
If the sensor is installed directly on a wall surface, install the humidity sensor using 2 screws and 2 hollow wall anchors (field-supplied); do not overtighten screws. See Fig. 17. The useofastandard2x4-in.electricalboxtoaccommodatethe wiring is recommended for installation.
DO NOT touch the sensing element or clean with chemical solvents; they can permanently damage the sensor.
The sensor must be mounted vertically on the wall. The Carrier logo should be oriented correctly when the sensor is properly mounted.
DO NOT mount the sensor in drafty areas such as near the unit’s discharge grille, open windows or fans, or over heat sources such as baseboard heaters, radiators, or wall-mounted light dimmers. Sensors mounted in those areas will produce inaccurate readings.
Avoid corner locations. Allow at least 4 ft between the sensor and any corner. Airflow near corners tends to be reduced, resulting in erratic sensor readings.
Sensor should be vertically mounted approximately 5 ft up from the floor.
For distances up to 500 feet, use a 3-conductor shielded, 20 AWG cable. A CCN communication cable can be used. The shield and drain wire must be removed from the sensor end of the cable. See Fig. 24 for wiring details.
The power for the sensor is provided by the control board. The board provides 24 vdc for the sensor. No additional power source is required.
To wire the sensor, perform the following:
1. At the sensor, remove 4-in. of jacket from the cable. Strip
1
/4-in. of insulation from each conductor. Route the cable through the wire clearance opening in the center of the sensor. See Fig. 24.
2. Connect the RED wire to the sensor screw terminal marked (+).
3. Install one lead from the resistor (supplied with the sen­sor) and the WHITE wire, into the sensor screw terminal marked (–). After tightening the screw terminal, test the connection by pulling gently on the resistor lead.
4. Connect the remaining lead from the resistor to the BLACK wire and secure using a closed end type crimp connector or wire nut.
5. Using electrical tape, insulate any exposed resistor lead to prevent shorting.
6. At the control end, remove the jacket from the cable and route the RED conductor over to the left side of the con­trol board. Route the remaining conductors to the right side of the control board.
1
7. Strip
/4-in. of insulation from each conductor and equip
each with a1/4-in. female quick connect terminal.
8. Connect the RED wire to terminal T26 on the control board.
9. Connect the BLACK wire to terminal T16 on the control board.
10. Connect the WHITE/CLEAR wire to terminal T15 on the control board.
11. Equip the shield wire with a no. 8 fork-type lug and secure to the control module mounting screw between terminals T16 and T17.
Fig. 23 — Wall-Mounted Relative Humidity Sensor
(Part No. HL39ZZ003)
36
Page 37
321
J1 POWER
J4 SERVICE CONNECTOR
321
J3 CCN
T26
24Vdc
T28
T29
COOLING
T32
T35
T38
K3
HI/MED
OUTPUT
HEATING OUTPUT
MIXED AIR DAMPER OUTPUT
HEATING ENABLE
COOLING ENABLE
T30
T31
T33
T34
T36
T37
T39
FAN SPEED
ANALOG SENSOR INPUT
DISCRETE SWITCH INPUTS
K2
MED/LO
FAN SPEED
SPT/RAT
SAT
MAT
OAT
SPT ADJ
AQ
RH
FAN STATUS
OA ENTH
REMOTE
S/S
FIRE SMOKE
LOW LIMIT
CHANGE OVER
SPARE
COMMON GND
K1
FAN ON/OFF
T2
T4
T6
T8
T10
T12
T14
T16
T18
T20
T22
T24
T1
T11
T13
T15
T17
T19
T21
T23
T25
T3
T5
T7
T9
RED
WHITE
BLACK
SHIELD
3 CONDUCTOR 20 AWG SHIELDED CABLE
499
RESISTOR (SUPPLIED
W/SENSOR)
HUMIDITY SENSOR
+
--
NO
NC COM NO
NC
COM
NO NC
ADJ — Adjust AQ — Air Quality CCN — Carrier Comfort Network® COM — Common GND — Ground MAT — Mixed-Air Temperature Sensor OA EN TH — Outdoor-Air Enthalpy OAT — Outdoor-Air Temperature Sensor
Fig. 24 — Wiring of Relative Humidity Sensor to Control Board
COM
LEGEND
NC — Normally Closed NO — Normally Open RAT — Return-Air Temperature Sensor S/S — Start/Stop SAT — Supply-Air Temperature Sensor SPT — Space Temperature Sensor RH — Relative Humidity
37
Page 38
CHANGEOVER SWITCH (Factory-Installed Option) — The changeover switch is used with 2-pipe changeover units to determine if the temperature of the water in the water loop can provide cooling or heating (Fig. 25). The switch provides this input to the control. The changeover switch is factory-wired to the control and ready for field mounting to the water piping. The switch mounts to the water pipe using a spring-loaded clamp.
It is primarily used for a stand-alone application, although the changeover switch may be required for CCN applications if the water temperature status is not available through the network. For stand-alone applications, one switch is required for each 2-pipe unit. If the units are connected together on a 3-wire CCN communication bus and a linkage thermostat (or Unit Ventilator Comfort Control module [P/N 110500])is used, then a single switch can be connected to any one unit and the linkage thermostat can be configured to broadcast the switch status to all other units.
IMPORTANT: The switch must be mounted on the supply water pipe, where water flows continuously to accurately sense the available water temperature. Never mount the sensor on piping which is connected to a 2-way valve.
Fig. 25 — Changeover Switch
FILTER/SMOKE STATUS (CCN Systems Only) — The filter/smoke status is monitored by the control module and contains an adjustable alarm limit. The control accumulates fan-operating hours; when the total hours exceed the limit, an alarm is generated.
The alarm limit is adjustable from 100 to 9900 hours. It is factory preset to 1500 operating hours. The limit is normally field adjusted and is dependent on the filter media used as well as the quality and amount of outdoor air required. The normal range is from 400 to 1500 hours.
Carrier Comfort Network® Interface — The Carrier
Comfort Network (CCN) communication bus wiring is supplied and installed by the electrical contractor. It consists of shielded, 3-conductor cable with drain wire.
The system elements are connected to the communication bus in a daisy-chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system element on either side of it; the negative pins must be wired to the negative pins; the signal ground pins must be wired to signal ground pins. See Fig. 26 for location of the CCN communication connector (NET­WORK) on the control module.
NOTE: Conductors and drain wire must be 20 AWG mini­mum, stranded tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or polyethyl­ene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –20 C to 60 C is required. See Table 14 for cables that meet the requirements.
When connecting the CCN communication bus to a system element, a color code system for the entire network is recom­mended to simplify installation and checkout. The following color code is recommended:
SIGNAL
TYPE
+ RED 1
Ground WHITE 2
– BLACK 3
CCN BUS
CONDUCTOR
INSULATION
COLOR
CCN
CONNECTOR
POWER
RJ-14 SERVICE JACK
CCN CONNECTOR
SERVICE
NETWORK
Fig. 26 — CCN Communication Connector
If a cable with a different color scheme is selected, a similar
color code should be adopted for the entire network.
At each system element, the shields of its communication bus cables must be tied together. If the communication bus is entirely within one building, the resulting continuous shield must be connected to ground at only one point. See Fig. 27. If the communication bus cable exits from one building and en­ters another, the shields must be connected to ground at the lightning suppressor in each building where the cable enters or exits the building (one point only).
To connect the control to the network, proceed as follows (Fig. 27):
1. Turn power to the control box OFF.
2. Remove the CCN connector from the control board.
3. Cut the CCN wire and strip the ends of the RED, WHITE, and BLACK conductors.
4. Using a wire nut, connect the 2 drain wires together.
5. Insert and secure the 2 RED wires to terminal 1 of the CCN connector.
6. Insert and secure the 2 WHITE wires to terminal 2 of the CCN connector.
7. Insert and secure the 2 BLACK wires to terminal 3 of the CCN connector.
8. Replace connector on control board.
9. Turn on power to control box.
38
Page 39
GROUND
DRAIN WIRE
BLACK
WHITE
RED
1
CCN
CONNECTOR
LEGEND
CCN — Carrier Comfort Network
2
UNIT VENTILATOR
3
DRAIN WIRE
BLACK WHITE
RED
CCN
CONNECTOR
1
2
3
UNIT VENTILATOR UNIT VENTILATOR UNIT VENTILATOR
1000 FT MAXIMUM
Fig. 27 — CCN Communication Wiring
Relays — The fan relays are an integral component of the
control board. The fan motor speed control uses three SPDT relays. The control relays are shown in Fig. 24. See the follow­ing sections for a description of how the control relay is used with each function.
FAN RELAY — The fan rela y (K
) is factory-wired and
1
factory-installed on all units. The relay interfaces with the Electronically Commutated Motor (ECM) motor control circuit and automatically starts and stops the fan.
FAN SPEED RELAYS — The fan speed relays, K
and K3,
2
select the operating speed of the fan (High/Medium/Low). The fan speed relays are factory-wired and factory-installed. These relays control the speed of the motor.
Actuators
MODULATING OUTDOOR-AIR DAMPER ACTUATOR (Fig. 28) — The outdoor-air damper actuator is factory­supplied and factory-installed directly on the damper jackshaft. All wiring between the actuator and the control is provided by the factory. The actuator is mounted so that the spring return will close the outdoor-air damper and open the return-air damper on loss of power.
The actuator consists of an electronically controlled revers­ible motor equipped with a microprocessor drive. The damper actuator is supplied with approximately 8 ft of plenum rated cable.
The actuator is capable of holding its position at any point in the stroke and moving the damper in either direction.
The actuator is powered by the fused 24 vac transformer located in the control box.
DRAIN WIRE
BLACK
WHITE
RED
CCN
CONNECTOR
DRAIN WIRE
BLACK
WHITE
RED
1
1
2
3
CCN
CONNECTOR
2
DRAIN WIRE
BLACK
WHITE
RED
3
FACE AND BYPASS DAMPER ACTUATOR (Fig. 29) — The actuator provides 35 in.-lb torque rating and is powered by the 24-vac transformer located in the control box.
Face and bypass dampers are factory-supplied and factory­installed on all face and bypass damper applications. These actuators are proportional modulating, direct shaft mount type, capable of being driven in either direction and holding position at any point in the travel range.
The actuators are supplied with plenum rated cable.
Actuator connections depend on the application. Refer to Application Data manual and wire label diagram for wiring information.
The actuator is equipped with a SPDT damper end switch, which senses when the damper is in the full bypass position. The switch position is adjusted so that the switch closes when the damper moves about 5 degrees from the full bypass position.
FIELD-SUPPLIED TWO-POSITION RELIEF DAMP­ER — A field-supplied relay is required to wire a field­supplied two-position damper or ventilation unit, such as a heat recovery ventilator (HRV) or energy recovery ventilator (ERV) to the control module. A SPST normally open relay, such as HB61KK324, must be field-installed and wired for use with the field-supplied damper actuator or ventilation unit.
Using 18 AWG twisted cable, connect the relay coil con­tacts to the control terminals J1-2 and T34. See Fig. 24 and 30.
To connect a field-supplied two-position damper actuator, (Fig. 30), connect one contact of the actuator to the normally open contact of the relay. Connect the common contact of the relay to one leg of the power source. Connect the other contact of the actuator to the outer leg of the power source.
39
Page 40
CW
HF23BJ040
Made in Switzerland
by Belimo Automation
35 in-lb (4 Nm)
20s
150s
M
NEMA 2 Class 2 Supply
LISTED 94D5
U
TEMP.IND. &
L
REG. EQUIP.
LR 92800
24VAC/DC
50/60Hz
5VA
2.5W COM
CCW
CW
~~~ 2
1
red
blk
+
CCW
M
CW
M
R
3
grn
wht
W3
Direction
Control
4
W4
Fig. 28 — Modulating Outdoor-Air Damper
Actuator (Part No. HF23BJ040)
CCW
CW
M
M
LR 92800
U
1
R
L
0
HF23BJ039
Made in Switzerland
by Belimo Automation
S2
S2
S1
S1
S3S3
(CW)
1
.5
0
(CCW)
24VAC/DC
5 (2.5)A
S2
S3 1
S1
yel
blu
ora
24VAC/DC 50/60Hz 3VA 2W
CCW
CW
red
blk
COM
35 in-lb (4 Nm)
80...110s
3
2
wht
+
+
NEMA 2
LISTED
94D5 TEMP.IND. & REG. EQUIP.
Class 2 Supply
Fig. 29 — Face and Bypass Damper
Actuator (Part No. HF23BJ039)
FIELD-SUPPLIED DAMPER HRV OR ERV
2
4
(HN61KK324 RELAY SHOWN)
SEPARATE ISOLATED POWER SOURCE (24, 120, OR 240 VAC.)
LEGEND
ERV — Energy Recovery Ventilator HRV — Heat Recovery Ventilator
Field Wiring
Fig. 30 — Two-Position Minimum Outdoor-Air Damper Relay
5
1
63
40
(BLK)
(RED)
J1
2
T34
CONTROL BOARD
TERMINAL
Page 41
Direct Expansion (DX) Cooling — The Unit Venti-
lator Comfort Control module is designed to provide up to 2 stages of capacity control for direct expansion (DX) cooling applications. The control can be interfaced with condensing units, unloader solenoid valve, hot gas bypass valves, and liq­uid line solenoid valves. In these applications, the stages of DX capacity are controlled to maintain the space temperature at the cooling set point. Typically, compressor stages and liquid line solenoid valves operate normally open, while unloaders and hot gas bypass valves operate normally closed (see Fig. 31).
The Unit Ventilator Comfort Control module provides a SPDT relay contact for the first stage of DX cooling. These contacts are designed to switch up to 1 ampere of power (24 to 277 vac at 60 Hz).
Each DX output is configured to provide a minimum off time of 5 minutes after being deenergized. This Time Guard control feature allows the refrigerant pressures to equalize after a compressor shutdown, thereby protecting compressors from damage caused by starting with excessive loads. The Time Guard control can be disabled if the stage is used to control a solenoid valve or unloader.
OUTDOOR-AIR TEMPERATURE (OAT) LOCKOUT — An outdoor-air temperature lockout is provided to disable all DX cooling. The control compares the outdoor-air temperature to the user-adjustable DX outdoor air lockout set point. Whenever the OAT drops below the set point, all stages of DX cooling are disabled.
The outdoor-air lockout feature is used to ensure the condensing unit does not operate below its designed minimum outdoor temperature.
DX System Design — Recommendations for basic DX
system design and piping should always be followed and are available in the Carrier System Design manual.
The Unit Ventilator Comfort Control module maintains the space temperature at the cooling set point by operating the DX stages as the space load requires. Configuration requirements for systems using DX components vary according to the system design.
IMPORTANT: Never oversize the condensing unit.
For units equipped with CCN controls, condensing units should be sized for medium speed airflow unless a hot gas bypass valve or two-stage condenser is supplied.
Several staging control examples for typical DX applica­tions are shown in Examples 1-3. Use a service configuration tool to configure the number of stages and the logic type and Time Guard control features. See Set-Up, Configuration and Operation section on page 46 for further configuration details.
Example 1 — Single-Stage Single Condensing Unit
STAGE
NUMBER
1 Compressor Normal Enabled 2 Hot Gas Inverted Disabled
STAGE
TYPE
LOGIC
TYPE
TIME GUARD
FUNCTION
Example 2 — Two-Stage Single Condensing Unit
STAGE
NUMBER
1 Compressor Normal Enabled
2
*Optional, based on the system design or hot gas bypass.
STAGE
TYPE
Electric
Unloader no. 1*
LOGIC
TYPE
Inverted Disabled
TIME GUARD
FUNCTION
Example 3 — Condensing Unit with
Two-Speed Compressor
STAGE
NUMBER
1
2
STAGE
TYPE
Compressor
or Low Speed
Compressor
or High Speed
LOGIC
TYPE
Normal Enabled
Normal Enabled
TIME GUARD
FUNCTION
The preceding examples are typical; however, staging for each system is unique. Staging is for capacity control only and does not eliminate any components required for safety or by recommended system design. Follow equipment application and installation instructions for sizing, location of electrical connections, and required components such as liquid-line solenoid valves used for refrigerant isolation, and thermostatic expansion valves.
NORMALLY OPEN CONTACT TERMINALS
24
56
NORMALLY CLOSED CONTACT TERMINALS
3
1
COIL TERMINALS
RELAY CONTACT RATINGS
48 va at 24 vac 0.25 power factor 125 va at 115 vac 0.25 power factor 230 va at 230 vac 0.25 power factor
Fig. 31 — DX Control Relay (Part No. HN61KK324)
41
Page 42
Electric Heat — Two control relays are factory-supplied,
factory-installed and factory-wired to provide staging control for electric heater applications. They are used to operate the electric heater elements in two stages. The relays are installed inside the electric heat control compartment. The heater circuit connections depend upon the actual number of heater elements provided. The Unit Ventilator Comfort Control module pro­vides two stage electric heat control capability unless only one element is provided.
The control operates the heater stages as required, but pre­vents the discharge air temperature from exceeding 140 F at any time.
The first stage is wired so that it operates between 33 to 50 percent of the total heater capacity. Refer to Table 16 for heater element circuit connections.
Remote Start — The remote start input is used to switch
the control operating mode from the unoccupied to the occu­pied state by means of a contact closure from an external con­trol system or an electro-mechanical time clock device. The control device must provide an isolated single-pole contact. Whenever the contact is closed and 24 vac is present on T20, the control will operate in the Occupied mode.
Using 18 or 20 AWG wire, connect the remote start termi­nal (T20) to one side of the remote contact. Connect the other side of the contact to TB.
If a solid-state contact is provided by the control device, then a field-supplied and field-installed load resistor may be necessary to ensure reliable operation of the input. To ensure proper operation, use a digital volt meter (DVM) and measure the AC voltage between T20 and T25 with the external contact in the OFF or open position.
The input will operate properly if the AC voltage is less than 1 vac, otherwise a load resistor must be connected across termi­nals T20 (remote start input) and T25 (ground). Typically, a single 1000 ohm, 2 watt resistor will reduce the voltage suffi­ciently for most solid-state contacts. If not, add additional resis­tors, one at a time, until the voltage measured is below 1 vac. Because the resistors heat when operating, the devices should be permanently mounted to a field-supplied terminal strip and 20 AWG wire rated for at least 90 C should be used to connect the resistor(s) to control terminals T20 and T25.
Fire/Smoke Status Input — The Fire/Smoke Status
Input is used to identify that a fan has stopped its normal opera­tion due to an alarm condition at a local fire or smoke detector. This input must be used in conjunction with a normally closed contact which is wired into the fan motor control circuit.
A double-pole double-throw (DPDT) relay, part number HN61KK324, is recommended. One set of the relay contacts is
wired into the fan motor circuit and the other set is wired to the control input. The control box provides 24 vac power for the relay. The relay is controlled by a separate isolated contact set from the smoke or fire detector.
All wiring from the detector should be appropriately rated for the application and must comply with NEC, NFPA (Nation­al Fire Protection Association) and any local codes.
SMOKE/FIRE DETECTOR WIRING (Normally Open Contact Set) — Perform the following procedure to wire the smoke/fire detector:
1. Use15AWGwireratedfor600vacforallwiring.
1
/4-in. insulated female quick-connect type lugs
Eight are required.
2. Connect a wire from TB to one of the detector contact terminals.
3. Connect the other detector contact terminal to the relay coil terminal no. 1.
4. Connect the other coil terminal, no. 3, to ground in the control box.
5. Connect the normally closed contact set (relay termi­nals no. 5 and no. 6) to the fan motor wiring as shown on the label diagram.
6. Connect one of the normally open relay contacts, ter­minal no. 2, to TB (24 vac).
7. Connect the other side of the contact, terminal no. 4, to T21 on the control module.
SMOKE/FIRE DETECTOR WIRING (Normally Closed Contact Set) — Perform the following procedure to wire the smoke/fire detector:
1. Use15AWGwireratedfor600vacforallwiring.
1
/4-in. insulated female quick-connect type lugs
Eight are required.
2. Connect a wire from TB to one of the detector contact terminals.
3. Connect the other detector contact terminal to the relay coil terminal no. 1.
4. Connect the other coil terminal, no. 3, to ground in the control box.
5. Connect the normally open contact set (relay terminals no. 2 and no. 4) to the fan motor wiring as shown on the label diagram.
6. Connect one of the normally closed relay contacts, ter­minal no. 5, to TB (24 vac).
7. Connect the other side of the contact, terminal no. 6, to T21 on the control board.
TOTAL NO.
OF HEATER
CIRCUITS
3 133267 4 250250 5 240360 6 233467
NO. OF CIRCUITS
CONTROLLED
BY STAGE 1
Table 16 — Heater Element Wiring
STAGE 1
CAPACITY (%)
NO. OF CIRCUITS
42
CONTROLLED
BY STAGE 2
STAGE 2
CAPACITY(%)
Page 43
Valves
WATER VALVES — Water valve assemblies are shipped with the unit for field installation. All factory-supplied valves are fully modulating and capable of being positioned at any point within the travel range of the valve. Each valve is shipped complete with an actuator and any required linkage.
The equal percentage characteristics of the modulating valves provide close temperature control on heating, cooling or reheat unit ventilator coils.
In case of power failure, a return spring sends the valve to its normal position. The normal position is defined for each control sequence.
Water Valve Actuators mounted on factory-supplied valve assemblies. The valve and actuator assemblies are modulating spring return for all water and steam applications. Valves are factory supplied.
All valves use actuators with reversible electric motors. The control provides proportional control to the electric motor which receives a tri-state signal from the control.
All valves have a spring return feature that allows them to return to a normal positions (normally closed) upon loss of power.
All valve assemblies have electrically powered actuators. Each actuator is factory-wired and operates its valve through a linear stroke.
Each water valve actuator features a magnetic clutch to ex­tend the life of the motor and gear train. A manual override le­ver and position indicator facilitates field setup.
To prevent electric shock and equipment damage, discon­nect the power to the control before performing any work on valve assemblies.
— Water valve actuators are factory-
.
The manual positioning lever on all water valves should only be used when controller power is OFF. DO NOT attempt to move this lever when controller power is applied. If the position lever does not move freely for man­ual positioning when the power is off, remove the valve cover and push the solenoid plunger down using a small screwdriver inserted in the slot below the solenoid.
DO NOT install valve assembly where excessive moisture, corrosive fumes, and/or vibration are present.
INSTALL all 2-way valve assemblies so that they close against system flow. Proper flow direction is from inlet ‘B Port’ to outlet ‘A Port’.
ALWAYS install 3-way mixing valve with 2 inlet flows and one outlet. Proper flow direction is: inlet ‘B Port’ to coil. Inlet ‘A Port’ to supply. “Common Port’ to return. See Fig. 33.
Water Val ve Wirin g — Valve wiring is determined by the actual valve selected and the control sequence.
All valves are factory-wired to the control module and
tested.
Water valve specifications and dimensions are found in
Table 17 and Fig. 34.
DO NOT MOUNT VALVE HERE
VERTICAL
45° MINIMUM/ 90° MAXIMUM FROM VERTICAL
On chilled water or hot water applications, the valve actua­tors can be mounted in any position above the center line of the valve body. For steam applications, mount the actuator above the centerline of the valve body and at least 45 degrees from vertical. This position prevents exposing the actuator to ex­treme heat. Refer to Fig. 32.
Table 17 — Water Valve Specifications
FEATURE SPECIFICATION Application Hot or Chilled Water, up to 50% Glycol
Fluid Temperature
Flow Type Equal % Service Port Linear Bypass (3-way only) Static Pressure Limits 300 psi (20.7 bar) Current Requirement (24 V Supply) 12 VA (in rush), 100 mA Continuous
Material
Maximum Ambient Temperature and Humidity 125 F (52 C) 95% Non-Condensing
Actuator
Weight 3.0 lb (1360 g)
Minimum 32 F (0° C) Maximum 200 F (93 C)
Body Forged Brass Stem Chrome-Plated Brass Seat Stainless Steel Plug High Temperature Thermoplastic Actuator Stainless Steel Base, Aluminum Cover
Vol tag e
Power
Connections Screw Terminals
Fig. 32 — Valve Mounting Angle for
Steam Heating Applications
24vac—15%, +10% 50/60 Hz
12 VA inrush at 24 vac
2.5 VA holding
43
Page 44
B
A
WATER
COIL
WATER
COIL
COM
RETURN SUPPLY
3- WAY VALV E
AB
RETURN
SUPPLY
2- WAY VALV E
Fig. 33 — Typical Piping for Spring Return
2-Way and 3-Way Mixing Valves
The valve type is identified by the first digit of the two-digit control code number. In Table 18, the water valve type is shown for each unit depending on coil capacity.
NOTE: Dimensions are in inches (mm).
Fig. 34 — Water Valve Dimensions
(Modulating Type)
For pressure drops other than those tested, see Table 19. See
Tables 20 and 21 for close-off pressure.
Table 18 — Factory-Supplied Water Valves
CONTROL SEQUENCE APPLICATION VALVE APPLICATION NORMAL POSITION
DX — Direct Expansion
2A/3A Chilled/Hot Water (Modulating Valve) Control Chilled Water/
2B/3B Chilled Water Cooling, Hot Water
2D/3D Chilled Water Cooling, Electric Heat Chilled Water Open 2F/3F Hot Water or Steam Heating Only Hot Water/Steam Open
2G/3G Hot Water or Steam Heating, DX Cooling Hot Water/Steam Open
2J/3J Chilled Water Cooling Only Chilled Water Open
2K/3K Face and Bypass Chilled Water Cooling
2M/3M Face and Bypass Chilled Water Cooling
20/30 Chilled Water/Hot Water Using Face
21/31 Chilled Water Cooling, Hot Water or
22/32 Chilled Water Cooling, Electric Heat Chilled Water Open 23/33 Hot Water or Steam Heating, DX Cooling Hot Water/Steam Open 24/34 Hot Water or Steam Heating Only Hot Water/Steam Open 25/35 Chilled Water Cooling Only Chilled Water Open
LEGEND
or Steam Heating
with Valve Control Heating
with Valve Control Reheat
and Bypass Damper Control
Steam Heating
Hot Water
Chilled Water
Hot Water/Steam
Chilled Water
Reheat
Chilled Water
Reheat
Preheat
Chilled Water/
Hot Water
Chilled Water
Hot Water/Steam
Open
Closed
Open
Closed
Open
Closed Closed
Open
Open
Closed
Open
44
Page 45
Table 19 — Valve and Coil Pressure Drops vs Flow
UNIT SIZE
(NOMINAL
CFM)
500
750
1000
1250
1500
2000
LEGEND Cv — Coefficient of Volume *Hot water only.
NOTE: Desired Pressure Drop =
COIL
ROWS
1* 2.5 3.1 4 2* 2.5 3.3 4
32.53.34
42.53.34
52.53.34 1* 2.5 3.1 4
2* 2.5 3.5 4
32.53.34
42.53.34
52.53.34 1* 2.5 3.6 4
2* 2.5 3.5 4
34.046
44.046
54.046 1* 2.5 3.6 4
2* 2.5 3.5 4
34.06.78
44.06.78
54.06.78 1* 2.5 3.6 4
2* 2.5 3.8 4 3 4.0 10.8 10 4 4.0 10.8 10 5 4.0 10.8 10
1* 2.5 3.6 4 2* 2.5 3.8 4 3 4.0 10.8 10 4 4.0 10.8 10 5 4.0 10.8 10
SUPPLIED
VALV E
(Cv)
(
TYPICAL VALVE
AND COIL
PRESSURE DROP
psi gpm
desired gpm flow
flow from table
2
)
Table20—2-WayWaterValveSpecifications
and Ratings
APPLICATION
Steam
Hot/Chilled Water
Chilled Water
Only
LEGEND
Cv — Coefficient of Volume
COEFFICIENT
VOLUM E
FLOW
Cv
1.3 35 OPEN
2.2 35 OPEN
4.4 35 OPEN
2.5 50 OPEN
4.0 35 OPEN
2.5 50 CLOSED
4.0 35 CLOSED
CLOSE-OFF PRESSURE
PSI
POSITION
Table21—3-WayWaterValve
Specifications and Ratings
APPPLICATION
Hot/Chilled
Water
Chilled Water
Only
LEGEND
Cv — Coefficient of Volume
COEFFICIENT
VOLUM E
FLOW
Cv
2.5 50 OPEN
4.0 35 OPEN
2.5 50 CLOSED
4.0 35 CLOSED
CLOSE-OFF
PRESSURE
PSI
NORMAL
NORMAL POSITION
(COIL)
2-WAY STEAM VALVES — All steam valves utilize an electrically driven hydraulic actuator which provides a full modulating capability and a return feature. Each steam valve is factory-equipped with a spring linkage extension to prevent
Table 22 — 2-Way Valve Specifications
Application Steam Fluid Temperature Maximum 281 F (138 C)
Steam Pressure Limits
Flow Type Equal%
Material
Valve Connections
Maximum Ambient Temperature 140 F (60 C)
Actuator
Weight 6.0 lb (3057 g)
NOTE: Avoid condensation which can facilitate corrosion. With 40 F (4C) water, the maxi­mum allowable ambient dew point temperature is 68 F (20 C). Piping insulation must not stop drainage at actuator mounting nut. Do not use hydraulic actuators with fluid tempera­tures below 40 F (4C).
Maximum Inlet 35 psi (241 kPa) Differential 20 psi (138 kPa)
Body Bronze Stem Stainless Steel Seat Bronze Plug Brass Packing Spring Loaded Teflon Disc Composition
Vol tag e 24 Vac -15%, +10% 50/60 Hz Power 22 VA at 24 vac Connections Wire Leads
any actuator damage due to high steam temperatures. Steam valve specifications and dimensions are found in Table 22 and Fig. 35.
Female, Union Sweat
5
/8in. ID (1/2in. Nominal Copper) Tube
45
Page 46
3-1/4
6-3/4
IN ‘A’
OUT ‘AB’
*9-25/32
1-5/16
4-1/4
FLOW
*Includes 21/32-in. (52 mm) for linkage extension. NOTES:
1. Allow 3 in. clearance above actuator for removal. Mount actua­tors above the valve body at 45-degrees from vertical. Refer to Fig. 32.
2. Dimensions are in inches.
Fig. 35 — Valve Dimensions
SET-UP, CONFIGURATION, AND
OPERATION
The Unit Ventilator Comfort Control module (P/N 110500) is designed to be installed using the CCN Network Service Tool, or a CCN Building Management system such as Building Supervisor, ComfortVIEW™ or ComfortWORKS® software. The control provides several comprehensive screens for easy set-up and configuration of the control. See Tables 23-29. Two additional screens display the operation of the equipment.
Each unit is factory-configured for the control sequence or­dered. Only set points, schedules, alarm limits, and user op­tions need to be adjusted. Tables 23-29 depict the screens that provide a list of the information contained within each func­tion, the expected range of values for each parameter, and the allowable force limits or configuration range. For specific in­formation about Network Service Tool, Building Supervisor, ComfortVIEW, or ComfortWORKS software refer to the oper­ating instructions for each specific piece of software.
The Service Configuration screens are used to specify the equipment model and control sequence being used, such as the type of heating or cooling used (chilled water, DX cooling, steam, or hot water) and the damper control type (ASHRAE Cycle I, II or III). These values are factory-configured for the control sequence as ordered. A separate configuration screen is used to modify the factory pre-configured alarm set points, if required, in order to meet a specific customer requirement.
The service configuration screens are located under the Diagnostic/Service Configuration function. See Table 24. Alarm configurations are shown in Table 25.
The Modify controller screen allows the installer to select from a list of standard control options which can be used for specific applications. Standard control options include Space Temperature Set Point adjustment with an adjustable maxi­mum limit, the ability to provide dehumidification with or without reheat, override duration, unoccupied free cooling, or warm up temperature check, and other control features.
The control configuration screens are located under the CCN Configuration function. See Table 27.
The Set Point screen is used to configure the desired control set points for the specific application. These set points include the occupied heating and cooling set points, the unoccupied heating and cooling set points, the ventilation airflow set point, the IAQ set point (optional) and the ASHRAE Cycle III Damp­er set point (for Cycle III control). The Set Point screen is locat­ed under the Modify/Set Points function. See Table 28.
The Points/Display screen is used to monitor equipment operation and provides a simple overview including: the oper­ating mode, heating and cooling capacity, ventilation airflow value, equipment and sensor alarms, and a list of actual sensor and output values. The Status Display screen is located under the Points/Display function. See Table 26.
The Maintenance screen provides an indication of the control algorithm operation and a view of each individual con­trol loop as it is currently functioning. The Maintenance screens are located under the Diagnostic/Maintenance func­tion. See Table 29. The Linkage Maintenance screens are locat­ed under the Diagnostic/Maintenance function. See Table 29. The Maintenance screen provides an indication of the informa­tion the Unit Ventilator Comfort Control module has received from the linkage thermostat (if supplied).
Act — Actual AQ — Air Quality ASCII — American Standard Code
ASHRAE — American Society of
CCN — Carrier Comfort Network® Cfg — Configured Cntrl — Control CV — Constant Volume DI — Discrete Input DX — Direct Expansion Ele — Element Hi Lim — High Limit
for Information Interchange
Heating, Refrigeration and Air Conditioning Engineers
LEGEND (For Tables 23-29)
Hys — Hystersis Kd — Derivative Constant Ki — Integral Constant Kp — Proportional Constant Lo Lim — Low Limit MAD — Mixed-Air Damper MAT — Mixed Air Temperature
Med — Medium min — minute Norm — Normal Nr — Number OAT — Outdoor-Air Temperature
Oc/Occ — Occupied PID — Proportional/Integral/
Sensor
Sensor
Derivative
46
Pos — Po si ti on RH — Relative Humidity Schd — Schedule SP/Setpt — Setpoint Stg — Stage Sup Blk # — Supervisory Block
Sup Bus — Supervisory Bus
Sup Ele — Supervisory Element
Tem p/T mp — Temperature Tim Gard — Time Guard Tmd Ovr — Timed Override Tmd Ovr Hrs — Timed Override Hours Unoc — Unoccupied
Number
Number
Number
Page 47
Table 23 — CCN Device Configuration
DEVICE NAME DESCRIPTION LOCATION
40UV/UH
NOTE: The device name, description, and location fields can be modified by the Building Supervisor or ComfortWORKS® software.
Comfort
System Unit
Ventilator
SOFTWARE
PART NUMBER
CESR-131191-02
Table 24 — Service Configuration
DESCRIPTION POINT NAME STATUS / UNITS RANGE DEFAULT
2 Pipe Changeover UNITTYPE Disable/Enable 0 - 1* Disable
ASHRAE Cycle Fan Control CYCLE x 1 - 3† 2
# Fan Speeds (1-3) FAN_TYPE x 1 - 3† 3
Unit Size UNITSIZE xxxx CFM 100 - 5000 1000
% Air Flow Med AFMED * % 30 - 100 80 % Air Flow Low AFLOW* % 20 - 100 70
Fan PID
Kp KP xx.x 0.0 - 40.0 10.0
Ki KI x.x 0.0 - 10.0 3.0
Kd KD xx.x 0.0 - 20.0 0.0
Starting Value STARTVAL xx.x % 0.0 - 100.0 0.0
Cooling Type CV Cooling COOL_TYPx 0-3† 0
Staged Cooling Nr of Stages STAGES x 1 - 2 1
Staged Heating Nr of Stages STAGES x 1 - 2 1
CV Mixed Air Damper
AQ Low Reference (PPM) AQLO xxxx 0.0 - 5000.0 0.0
AQ High Reference (PPM) AQHI xxxx 0.0 - 5000.0 2000.0
Filter Timer hrs * 100 FIL_TIMRxx 0-99 12
*0 = Disable or Normal
1 = Enable or Inverted
Kp KP xx.x 0.0 - 40.0 8.0
Ki KI x.x 0.0 - 10.0 0.3
Kd KD xx.x 0.0 - 20.0 0.0
Starting Value STARTVAL xx.x °F 40.0 - 90.0 65.0
Stg 1 Tim Gard TG1 Disable/Enable 0 - 1* Enable
Stg 2 Tim Gard TG2 Disable/Enable 0 - 1* Enable Stage 1 Logic Type CLT1 Norm/Invert 0 - 1 Normal Stage 2 Logic Type CLT2 Norm/Invert 0 - 1* Normal
Heating Type HEAT_TYPx 0-3† 0
Heating
Kp KP xx.x 0.0 - 40.0 8.0
Ki KI x.x 0.0 - 10.0 0.3
Kd KD xx.x 0.0 - 20.0 0.0
Starting Value STARTVAL xx.x °F 40.0 - 90.0 80.0
Fan Off Value HCFOV xx.x °F 35.0 - 70.0 55.0
Stg 1 Tim Gard TG1 Disable/Enable 0 - 1* Enable
Stg 2 Tim Gard TG2 Disable/Enable 0 - 1* Enable Stage 1 Logic Type HLT1 Norm/Invert 0 - 1* Normal
Damper Type MIXDx 0-21
Kp KP xx.x 0.0 - 40.0 8.0 Ki KI x.x 0.0 - 10.0 0.3 Kd KD xx.x 0.0 - 20.0 0.0
Starting Value STARTVAL xx.x °F 40.0 - 90.0 60.0
Air Quality
Kp KPxx.xx 0-1.00.1
Ki KI xx.xx 0 - 1.0 0.03
Max AQOutput AQMDP xxx.x % 0.0 - 100.0 85.0
AQ Low Voltage Volts xx.x Volts 0.0 - 10.0 2.0
AQ High Voltage AQINHI xx.x Volts 0.0 - 10.0 10.0
Space Temp Trim RATTRIM xx.x ^F –5.0 - 5.0 0.0
MAT Sensor Trim MAT T R I M xx.x ^F –5.0 - 5.0 0.0
OAT Sensor Trim OATT R IM xx.x ^F –5.0 - 5.0 0.0
†0 = None
1 =Modulating 2 = Two Position 3 = If applicable, Direct Expansion (DX) for Cooling Type. Electric
Heating for Heating Type.
47
Page 48
Table 25 — Alarm Service Configuration
DESCRIPTION POINT NAME STATUS / UNITS RANGE DEFAULT
Alarm Routing Control ALRMCNT xxxxxxxx 0 - 1* 11010000
Realarm Time REALARM xxx min 1-255† 255
Cntrl Temp Hys xx.x ^F
Supply Air Temperature SPTHYS 1.0 - 20.0 5.0
Lo Lim LOWLIM xxx.x °F –40.0 - 245.0 45.0
Hi Lim HIGHLIM xxx.x °F –40.0 - 245.0 150.0
Mixed Air Temperature
Lo Lim LOWLIM xxx.x °F –40.0 - 245.0 40.0
Hi Lim HIGHLIM xxx.x °F –40.0 - 245.0 120.0
Relative Humidity
Lo Lim LOWLIM xxx.x %RH 0.0 - 100.0 30.0
Hi Lim HIGHLIM xxx.x %RH 0.0 - 100.0 70.0
Outdoor Air CFM
Lo Lim LOWLIM xxxx.x CFM 0.0 - 5000.0 0.0
Hi Lim HIGHLIM xxxx.x CFM 5000 - 5000 800.0
Air Quality
Lo Lim LOWLIM xxxx.x 0.0 - 5000.0 0.0
Outdoor Air Temperature
*0 = Disable
1 = Enable.
†255 disables realarming.
Hi Lim HIGHLIM xxxx.x 0.0 - 5000.0 800.0
Lo Lim LOWLIM xxx.x °F –40.0 - 245.0 40.0
Hi Lim HIGHLIM xxx.x °F –40.0 - 245.0 140.0
NOTE: Alarm retry time (in the event an alarm is not acknowledged) is fixed at 5 minutes.
Table 26 — Status Display
DESCRIPTION POINT NAME STATUS / UNITS
Desired Mode MODE xxxxxx ASCII*
Equipment Status ALARM Norm/Alarm
Controlling Temperature SPT xxx.x °F –40.0 - 245.0
Space Temperature RAT xxx.x °F –40.0 - 245.0
Supply Air Temperature SAT xxx.x °F –40.0 - 245.0
Mixed Air Temperature MAT xxx.x °F –40.0 - 245.0
Outdoor-Air Temperature OAT E MP xxx.x °F –40.0 - 245.0
Fan Re lay SF Off/On0-1**
Fan Status FANSTAT xxxxxx ASCII†
Remote Start REMOTE Off/On0-1**
Outdoor Air Enthalpy ENT High/Low 0 - 1**
Cooling Capacity CCAP xxx.x % Heating Capacity HCAP xxx.x %
Outdoor Air cfm OACFM xxxx.x CFM 0.0 - 5000.0
MAD Capacity 0.0 - 100.0 MIXDCAP xxx.x % 0.0 - 100.0
Filter Status FLTSTAT Clean/Dirty 0 - 1** Air Quality (PPM) AQ xxxx.x 0.0 - 5000.0 Relative Humidity RH xxx.x %RH 0.0 - 100.0
Fire Shutdown Norm/Alarm
Coil Freeze Detection CFD Norm/Alarm 0 - 1**
Changeover Switch Input CHANGOVR Heat/Cool 0 - 1**
Spare Discrete Input DI0 Off/On0-1**
Mixed Air Damper 1 MIXD1 Off/On0-1** Mixed Air Damper 2 MIXD2 Off/On0-1**
Heating Enable Output HEATING Off/On0-1**
Cooling Enable Output COOLING Off/On0-1**
*The text used for Mode shall be one of the following:
Off, Occ Cool, Occ Heat, Fan Only, UnocCool, UnocHeat, Warm-Up, Free Cool.
†The text used for Fan Status shall be one of the following:
Off, Low, Medium, High.
**0 =Off, High, or Clean 1 =On, Low, or Dirty. NOTE: The presence of override limits indicates that the point is forcible, all others are read
only.
FS Fire shutdown
Spare Analog Input AI0 xx.x Volts 0.0 - 10.0
Cooling 1 CCV1 Off/On0-1** Cooling 2 CCV2 Off/On0-1** Heating 1 HCV1 Off/On0-1** Heating 2 HCV2 Off/On0-1**
OVERRIDE
LIMITS
48
Page 49
Table 27 — CCN Configuration
DESCRIPTION POINT STATUS / UNITS RANGE DEFAULT
Warm-Up Temp Check WARMENAB Disable/Enable 0 - 1* Enable
Unoccupied Fan Cycling FAN_CYCL Disable/Enable 0 - 1* Disable
Unoccupied Free Cooling NTEN Disable/Enable 0 - 1* Enable
Free Cooling Lock-out NTLO xx.x °F 35 - 80 50.0
DXOutdoor Air Lock-out DXLO xxx.x °F –40 - 65 60.0
Max Offset Adjustment LIMT xx.x ^F0-200.0
Air Quality Control AQEN Disable/Enable 0 - 1* Disable
High Humidity Limit HIHUM xxx.x %RH 0 - 100 100.0
Local RH Sensor RHSENS No/Yes 0 - 1* No
Reheat REHEAT Disable/Enable 0 - 1* Disable
Occ Schd OCCSCHED xx 64 - 99† 64
Tmd Ovr Hrs TIMOVRID x hours 0 - 4 0
Linkage Thermostat
Cool Strt Bias (min/deg)KCOOLxx xx 0-60 10
Heat Strt Bias (min/deg)KHEAT xx min 0 - 60 10
*0 = Disable or No 1 = Enable or Yes
†Value below 65 (i.e., min value/default) disables global occupancy from CCN.
Table 28 — Set Point Configuration
DESCRIPTION POINT STATUS / UNITS RANGE DEFAULT
Setpoint
Oc Heat SP OHSP xx.x °F 40 - 90 70.0
Oc Cool SP OCSP xx.x °F 45 - 99 75.0
Unoc Heat SP UHSP xx.x °F 40 - 90 55.0 Unoc Cool SP UCSP xx.x °F 45 - 99 90.0
Cycle III Damper Setpt C3DSP xx.x °F 40 - 90 55.0
Economizer Lock-Out Temp ELOSP xx.x °F 40 - 90 63.0
Ventilation Setpoint OASP xxxx.x CFM 100 - 5000 200.0 AQ Setpoint (PPM) AQSP xxxx.x 0 - 5000 650.0
Table 29 — Maintenance
DESCRIPTION POINT STATUS / UNITS OVERRIDE LIMITS
Occupied OCCSTAT No/Yes
Linkage in Effect DAVCL No/Yes
Tmd Ovr in Effect TIMOV* No/Yes
Heat Master Reference HCMRxxx.x°F
Heat Submaster Reference HCSR xxx.x °F 35.0 to 140.0
Cool Master Reference CCMRxxx.x°F
Cool Submaster Reference CCSR xxx.x °F 40.0 to 150.0
MAD Master Reference MIXDMRxxx.x°F
MAD Submaster Reference MIXDSR xxx.x °F 48.0 to 120.0
Cfg MAD Min Position MIXDMDP xxx.x % 0.0 to 100.0 Act MAD Min Position DMPRMIN xxx.x %
Temperature Reset Value RESET xx.x ^F
Cooling in Effect COOLFLAG* No/Yes Heating in Effect HEATFLAG* No/Yes
Reheat in Effect REHTFLAG* No/Yes
AQ Control in Effect AQFLAG No/Yes
AQ Calc Damper Pos MDPAQ*xxx.x%
Fan Status DI FAN DI Off/On Fan Speed Relay 1 FANSPD1 Off/On0-1† Fan Speed Relay 2 FANSPD2 Off/On0-1†
Linkage Thermostat Linkage Status LINKSTAT* x
†0 =Off 1 =On NOTE: The presence of override limits indicates that the parameter is forcible;
all others are read only except those marked (*) which cannot be forced or read from CCN.
Sup Ele SUPE-ADR* xxx Sup Bus SUPE-BUS* xxx
Sup Blk # BLOCKNUM*x Avg Oc Heat SP OCLOSTPT* xx.x °F Avg Oc Cool SP OCHISTPT* xx.x °F
Avg Unoc Heat SP UNLOSTPT* xx.x °F
Avg Unoc Cool SP UNHISTPT* xx.x °F
Avg Zone Tmp AZT* xx.x °F
Avg Oc Zone Tmp AOZT* xx.x °F
OcStat OCCSTAT* x
49
Page 50
START-UP
Start-up procedures vary depending on time of year (sum­mer or winter) and building characteristics (new building/old building, occupied/unoccupied, etc.).
Start-up in the cooling mode requires proper care to avoid condensation problems. Condensation forms on surfaces that are colder than the dew point of the surrounding air. If a unit is started and is piped with low-temperature chilled water in a hot, humid atmosphere, condensation will form on many parts of the unit. In order to avoid excessive condensation, higher temperature water should initially be used (approximately 65 to 70 F). Also, the building should be as completely closed as possible. Close the unit’s outside-air dampers. Bathroom and kitchen exhaust fans should be off.
As the building temperature drops, the chilled water temper­ature can be gradually reduced until it reaches 50 F. At this point the outside-air damper can be opened to take in minimum outside air. When the chilled water temperature is reduced to its design point, the exhaust fans can be turned on.
SERVICE
Lock out and tag all power supplies to equipment and con­trols prior to servicing unit. Follow all safety codes. Failure to do so could result in personal injury.
Preventing Excessive Condensation on Unit —
Excessive condensation can be caused by running chilled water through a unit with the unit fan off. If fan cycling is used, a water flow control valve should be installed to shut off the water when the fan stops.
Other methods of control which avoid condensation prob­lems are as follows:
1. If condensation is forming on the unit, verify the chilled water valve is closing off tightly. Dirt or debris may pre­vent the valve from closing completely.
2. Continuous fan operation with motorized chilled water valve controlled by a thermostat.
3. Continuous fan operation with thermostat control to switchfanfromhightolowspeed(insteadofoff).
Check Drain — Check drain pan, drain line, and trap at
start of each cooling season. A standard type pipe cleaner for
3
/4-in. ID pipe can be used to be sure pipe is clear of obstruction so that condensate is carried away. Check the drain line at filter cleaning time during the cooling season. Be sure that debris has not fallen into unit through supply air grille.
Fan Motor Bearings — Standard motors are perma-
nent split capacitor, which are equipped with permanently sealed and lubricated bearings. No lubrication is required unless special motors have been supplied or unusual operating conditions exist.
Fan Shaft Ball Bearing — These mid and inboard
bearings are permanently sealed and lubricated. No additional maintenance is required. The end bearings must be lubricated at the start of each cooling and heating season. Add 5 to 10 drops of SAE 20 or 30 non-detergent based oil to the bearing.
Clean Fan Wheel — For access to fan assembly, remove
discharge grille (if supplied). If unit is connected to ductwork, remove front (40UV) or bottom (40UH) panel, separate fan shaft from motor at bushing, remove motor, and slide fan assembly from track. Use a stiff brush or vacuum to remove dirt and debris from scroll. Wipe all fan surfaces with a damp cloth. Reassemble as necessary.
Clean or Replace Air Filters — At the start of each
cooling season and after each month of operation (more or less depending on operating conditions), replace throwaway filter or clean permanent filter.
THROWAWAY FILTER — Replace filter with a good quality filter of the correct size. Do not attempt to clean and reuse disposable filters. See Table 1 for filter sizes.
PERMANENT FILTER (Fiber Type)
1. Tap on solid surface to dislodge heavy particles.
2. Wash in hot water. If needed, use mild solution of com­mercial solvent such as sal soda or trisodium phosphate.
3. Set filter on end so that water drains out through slots in frame. Allow filter to dry thoroughly.
4. Recharge filter with recharging oil. Three ounces is suffi­cient for a medium size filter. Oil may be applied by insect spray gun. For easier spraying, the oil can be warmed.
If the filter is dipped in the recharging oil, remove it immediately and allow to drain through slots in frame.
5. Replace filter in unit.
If another type of filter is used, follow the filter manufactur-
er’s instructions.
ECM Motor Removal and Reinstallation (Fig. 36) —
Commutated Motor (ECM) to drive the indoor fan.
The ECM is a factory programmed motor that is standard with factory-supplied controls (CCN) and units without factory-supplied controls that are used in high-static applica­tions or high-capacity coils.
The ECM is programmed with an algorithm that maintains a constant torque as the static pressure on the system varies. For example, as the filter pressure drop increases due to dirt, the fan will increase speed (rpm) to maintain the cfm.
The ECM is identified by the two electrical receptacles located on the housing. See Fig. 8A, 8B, and 36.
The first receptacle is a 5-row in-line connector that feeds the motor line voltage. This may be either 115 volts or 230 volts. Units that are wired for 230 volts have a jumper be­tween terminals 1 and 2 on this plug (see wiring diagram).
The second receptacle on the motor is a 16-pin connector and is used for speed switching. This is a low voltage (24-volt) connection. There is a jumper wire between terminals 1 and 3. This is a 24-volt ground. Voltage is present at all times when the motor is energized.
NOTE: A time delay exists between the time the motor speed is switched and the motor’s reaction. This is designed into the electronics and does not indicate motor problems.
When replacing the motor, note the following:
• Check the part number of the old motor against that of
the replacement. There is a tag indicating the eight-digit part number and begins with UVE. This is the program number used for this motor.
• The motor must be installed per the instructions below.
It is important to maintain the dimension between the fan compartment bulkhead and the coupling.
IMPORTANT: If a replacement cooling shroud has been
supplied, it should be installed and the old one
discarded. The motor shroud directs cooling air across
the motor to provide proper cooling. Never run the
motor without the cooling shroud in place. Ensure
the shroud inlet ring does not touch the motor; a gap of
1
/16in. to1/8in. is acceptable.
Carrier unit ventilators utilize an Electronically
50
Page 51
MOTOR SHAFT
COUPLING
FAN SHAFT
+
.125 .032
–
0.500 0.063
INSTALL MOTOR AND COOLING SHROUD ELECTRICAL CONNECTIONS FACING UNIT FRONT.
CENTER SHROUD OPENING OVER MOTOR ELECTRICAL CONNECTIONS.
+
–
+
1.000 0.063
–
SHAFTED END FACE
INSULATION FACE
MOTOR (ECM)
Fig. 36 — 40UV,UH Ventilator Blower Section Assembly — ECM Motor Detail
COUPLING INSIDE FACE
COUPLING FACE
MOTOR BEARING FACE
MOTOR FACE
51
NOTES:
1. All dimensions shown in inches.
2. Not all components shown for clarity.
3. Motor shroud not shown for clarity. Install prior to operation.
4. Refer to Fig. 42 for cooling shroud installation.
Page 52
Ensure the unit is completely assembled when checking the fan speed. Replace all panels, including the filters, before checking the fan for operation. When the internal pressure drops at a normal condition, the loading on the motor will be such that the fan can come up to selected speed.
Failure to ensure unit is completely assembled may
result in reduced life of unit and/or personal injury.
Blower Assembly Section Removal and Rein­stallation (Fig. 37)
Lock out and tag all power supplies to equipment and con­trols prior to servicing unit. Follow all safety codes. Failure to do so could result in personal injury.
To remove and re-install the motors, proceed as follows;
refer to Fig. 36:
1. Remove the wire plugs from the motor.
2. Remove the 2 screws holding the motor shroud to the bulkhead.
3. Slide the shroud off the motor to the right.
4. Loosen the 3 setscrews on the shaft coupling between the motor shaft and the fan shaft.
5. Loosen the motor ‘belly band’ and slide motor out of the ‘belly band’ to the right. It is unnecessary to remove the motor mounting bracket from the bulkhead. Loosen only the ‘belly band’ securing the motor in the mount.
6. Reinstall the motor in the ‘belly band.’
7. Ensure the blower wheels are centered within the fan housings (between the inlet rings) before securing the motor shaft coupling.
The motor electronics will fail prematurely if no air is able to circulate over the motor.
8. Ensure the motor housing is at least 1 in. from the bulkhead so that air will be able to circulate over the motor.
9. For vertical type units, position the motor so that the motor wire plugs are front facing on a horizontal plane. For horizontal type units with ceiling mounts, position the motor so that the motor wire plugs are front facing on a vertical plane.
10. Secure the 3 setscrews on the shaft coupling when the motor is properly positioned and the blower wheels are centered within their housing.
11. Re-secure the motor ‘belly band’ around the motor.
12. Reinstall the motor shroud. It is important that the motor shroud be installed prior to operation of the motor. Ensure the venturi is installed on the motor shroud.
13. Re-secure the two screws holding the motor shroud to the bulkhead.
14. Reinstall the motor wire plugs.
Be careful with all components during installation, espe­cially the bearing and plastic blower wheels. Any extreme force applied to these components can cause unintended damage and could void the unit warranty.
To remove blower assembly:
1. Turn off power to the unit.
IMPORTANT: Tag each right front panel (40UV) or middle bottom panel (40UH) for each unit. Panels have electrical information specific to each unit.
2. Remove all front (40UV) or bottom (40UH) panels. Re­move end panels.
3. Remove top panel with
5
/16in. nut driver and set optional vanes and screens to the side (40UV). Remove ductwork if required and remove top (40UV) or front (40UH) dis­charge plenum.
1
4. Remove
/4in. head screws along length of unit that se-
cure coil baffle to blower section. See Item 5 in Fig. 37.
5. Remove four
1
/4in. head screws that connect the blower section sides to the coil section sides. See Item 2 in Fig. 37.
6. Remove the
1
/4in. head screw from the center of the blower deck that attaches the blower deck to the pipe chase. See Item 1 in Fig. 37.
7. Remove six
1
/4in. head screws attaching coil baffle to
coil section. See Item 4 in Fig. 37.
8. Remove the harness connector(s) from the motor.
9. Remove the
1
/4in. head screw from the green ground wire that connects the motor to frame if unit has a PSC motor. ECM motors are grounded through the harness.
10. Remove the two carriage bolts retaining the front brace to the frame sides. See Item 6 in Fig. 37.
11. Remove the four nuts retaining the blower section to the back (40UV) or top (40UH) frame. See Item 3 in Fig. 37.
5
12. Remove the two
/16in. nuts retaining the inboard bearing bracket to the pipe chase (40UV,UH150 units only). See Item6inFig.38.
13. Remove blower section from frame.
52
Page 53
To reinstall blower assembly to frame of unit:
1. Reinstall blower section into frame assembly.
2. Tighten the four
5
/16in. nuts retaining blower section to
frame. See Item 3 in Fig. 37.
5
3. Tighten the two
/16in. nuts retaining the inboard bearing bracket to the pipe chase (40UV,UH150 units only). See Item6inFig.38.
4. Reinstall two carriage bolts that attach the front brace to the frame sides. See Item 6 in Fig. 37.
5. Rotate the fan shaft by hand to ensure that fans are unrestricted and can rotate freely. Check for any fan obstructions.
6. Re-attach green ground wire that connects the motor to the frame with ¼ in. head screw if unit has a PSC motor. ECM motors are grounded through the harness.
7. Connect harness connector(s) to motor.
8. Reinstall the coil baffle using six
1
/4in. head screws that attach the coil baffle to the coil section. See Item 4 in Fig. 37.
9. Reinstall the
1
/4in. head screw at center of blower deck attaching blower deck to pipe chase. See Item 1 in Fig. 37.
1
10. Reinstall the four
/4in. head screws holding the blower section sides to the coil section sides. See Item 2 in Fig. 37.
1
11. Reinstall
/4in. head screws along length of the unit, securing coil baffle to the blower section. See Item 5 in Fig. 37.
12. Reinstall optional vanes and screens and install top panel (40UV). Reinstall top (40UV) or front (40UH) discharge plenum and ductwork, if required.
13. Reinstall front (40UV) or bottom (40UH) panels. Rein­stall end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH) match­es unit tag.
14. Restore power to unit.
IMPORTANT: Disassembly order is not as important as reassembly. The assembly order of the bearing bracket installation is critical to having a well balanced and sound blower deck.
Coil Assembly Removal and Reinstallation (Fig. 39)
Lock out and tag all power supplies to equipment and con­trols prior to servicing unit. Follow all safety codes. Failure to do so could result in personal injury.
Turn off all power supplies to equipment and controls. Fail­ure to do so may cause personal injury or damage to the unit.
To remove coil assembly:
1. Turn off power to the unit.
IMPORTANT: Tag each right front panel (40UV) or middle bottom panel (40UH) for each unit. Panels have electrical information specific to each unit.
2. Remove all front (40UV) or bottom (40UH) panels. Re­move end panels.
3. Remove
1
/4in. head screws along length of unit that se-
cure coil baffle to blower section. See Item 2 in Fig. 39.
4. Remove four
1
/4in. head screws that connect the blower section sides to the coil section sides. See Item 1 in Fig. 39.
1
5. Remove
/4in. head screws attaching outside air (OA) ac­tuator to damper shaft OR locking quadrant assembly to damper shaft. Remove OA actuator or locking quadrant assembly.
6. Tag low-limit thermostat wiring and terminals. Dis­connect low-limit thermostat wiring (right end compartment).
7. Drain water and/or recover refrigerant in accordance with all applicable codes. Disconnect piping from coil connections.
8. Tag optional electric heat element wire terminations for later reconnection. Disconnect element wires from elec­tric heat control box (remove coil baffle for access).
5
9. Remove the four
/16in. nuts retaining the coil section to
the frame.
10. Remove coil section from frame.
To reinstall coil assembly:
1. Replace coil section into frames assembly.
5
2. Tighten the four
/16in. nuts retaining coil section to
frame.
3. Reconnect electric heat wiring in electric heat control box.
4. Reconnect wiring to low limit thermostat.
1
5. Replace the four
/4in. head screws holding the blower
deck to coil section (two on each side).
6. Replace coil baffle using
1
/4in. head screws. See Item 2
in Fig. 39.
7. Reinstall outside air actuator or locking quadrant handle
1
using
/4in. head screws.
8. Reconnect piping to coils. If water coil, purge air from coils and perform hydrostatic test to check for leaks. If DX coil, perform leak test using nitrogen, and evacuate and charge per recommended HVAC procedures and all applicable codes.
9. Replace coil section side insulation.
10. Replace front (40UV) or bottom (40UH) panels. Replace
end panels. Ensure that tag on each right front panel
(40UV) or middle bottom panel (40UH) matches unit tag.
11. Restore power to unit.
53
Page 54
COIL BAFFLE
RETURN AIR TEMPERATURE SENSOR (OPTIONAL) OPENING
FILTER DOOR RETAINER CLIPS (SEE NOTE 3)
COIL SECTION
DAMPER SECTION
DISCHARGE AIR TEMPERATURE SENSOR (OPTIONAL) OPENING
MOTOR & COUPLING SETCREW ACCESS
MOTOR
MOTOR ELECTRICAL BOX
FRONT BRACE
6
5
NOTES:
1. Unit shown in vertical orientation. Drawing applies to horizontal and vertical units.
2. Not all components shown for clarity.
3. 40UV,UH125-200 units only.
Fig. 37 — 40UV,UH Ventilator Blower Section
1
2
3
PIPE CHASE
4
COIL SECTION
BLOWER SECTION
54
Page 55
SEE NOTE 4
1
2
3
7
6
4
5
SEE DETAIL A
SEE DETAIL A
NOTES:
1. Not all components shown for clarity.
2. This drawing applies to 1500 cfm units only.
3. Remove shaft, motor, and coupling prior to bearing removal.
4. Refer to Fig. 36 and 43 for motor-coupling and coupling-shaft tolerances.
Fig. 38 — 40UV,UH Ventilator Inboard Bearing (40UV,UH150 Only)
BOTTOM VIEW
6
DETAIL A
55
Page 56
RETURN AIR TEMPERATURE SENSOR OPENING
FRONT COIL BAFFLE
DISCHARGE AIR TEMPERATURE SENSOR OPENING
MOTOR & COUPLING SETSCREW ACCESS
MOTOR
MOTOR ELECTRICAL BOX
2
FILTER DOOR RETAINER CLIPS (SEE NOTE 3)
NOTES:
1. Unit shown in vertical orientation. Drawing applies to horizontal and vertical units.
2. Not all components shown for clarity.
3. 40UV,UH125-150, 40UH200 units only.
COIL SECTION
DAMPER SECTION
COIL SECTION
DAMPER SECTION
1
BLOWER SECTION
Fig. 39 — 40UV,UH Ventilator Coil Section
56
Page 57
Ball Bearing Replacement (40UV,UH150; 40UH200 Units Only) —
units only, Fig. 41 for 40UV150 and 40UH150 units with PSC motors, Fig. 42 for 40UV150 and 40UH150 units with ECM motors.
Lock out and tag all power supplies to equipment and con­trols prior to servicing unit. Follow all safety codes. Failure to do so could result in personal injury.
The assembly order of the bearing installation is critical. Be careful with all components during removal and installa­tion. Any excessive force applied to these components can cause unintended damage and void unit warranty.
To replace ball bearing:
1. Turn off all power to unit.
IMPORTANT: Tag each right front panel (40UV) or middle bottom panel (40UH) for each unit. Panels have electrical information specific to each unit.
2. Remove front (40UV) or bottom (40UH) panels and right (motor end) end panel.
3. Remove top panel and set optional vanes and screens to the side (40UV). Remove ductwork if required and re­move top (40UV) or front (40UH) discharge plenum. For non-ducted 40UH horizontal units with front double de­flection discharge grille, remove grille for access to wheel setscrews. See Fig. 37.
4. Remove ¼ in. head screws along length of unit that se­cure coil baffle to blower section and remove front coil baffle. See Item 5 in Fig. 37.
5. Loosen setscrews on all blower wheels (two per wheel). See Fig. 38 and Fig. 40.
6. Loosen bearing setscrews.
7. Remove wiring harness connector(s) from motor.
8. If unit has ECM motor, remove motor shroud (sheet met­al cover — Fig. 40, Item 6; Fig. 42, Item 4) by removing
5
/16in. hex nuts. Do not discard cooling shroud.
two
9. Loosen Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3; Fig. 41, Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4; Fig. 41, Item 4; Fig. 42, Item 5), until motor housing (Fig. 40, Item 5; Fig. 41, Item 3; Fig. 42, Item 3) moves freely.
10. Slide shaft-coupling-motor assembly (Fig. 38, Items 3, 2, 1; Fig. 40, Items 5, 2, 10) out of wheels and unit until shaft clears inboard/center bearing assembly (30 in. max clearance required from edge of frame end).
5
/16in. motor mount (Fig. 40, Item 7; Fig. 41,
Refer to Fig. 40 for 40UH200
11. Remove
1
/2in. bolts (Fig. 38, Item 4; Fig. 40, Item 9) and hex nuts (Fig. 38, Item 7; Fig. 40, Item 1) securing bear­ing to bearing bracket. Remove bearing (Fig. 38, Item 5; Fig. 40, Item 8).
12. Install new bearing (Fig. 38, Item 5; Fig. 40, Item 8). Secure with
1
/2in. bolts (Fig. 38, Item 4; Fig. 40, Item 9)
and hex nuts (Fig. 38, Item 7; Fig. 40, Item 1).
13. Slide shaft-coupling-motor assembly (Fig. 38, Items 3, 2, 1; Fig. 40, Items 5, 2, 10) back into bearing and wheels.
Do not use excessive force. Damage to wheels may occur.
14. Insert shaft-coupling-motor assembly into wheels until motor clearance is as specified for motor type (PSC or ECM). See Fig. 43 or Fig. 36.
15. Ensure that motor shaft is perpendicular to motor blower endplate. Tighten
5
/16in. motor mount (Fig. 40, Item 7; Fig. 41, Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3; Fig. 41, Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4; Fig. 41, Item 4; Fig. 42, Item 5), until motor (Fig. 40, Item 5; Fig. 41, Item 3; Fig. 42, Item 3) is secure.
16. Install motor shroud (sheet metal cover — Fig. 40, Item 6; Fig. 42, Item 4) using two
5
/16in. hex nuts if using
ECM motor. Align “window” with receptacles on motor.
Motor control module could overheat and fail if oper­ated without cooling shroud.
17. Re-attach green ground wire that connects the motor to the frame with
1
/4in. head screw if unit has a PSC motor.
ECM motors are grounded through the harness.
18. Re-attach wiring harness connector(s) to motor.
19. Center each wheel in its respective housing and tighten wheel setscrews (two for each wheel).
20. Rotate the fan shaft by hand to ensure that fans are unrestricted and can rotate freely. Check for any fan obstructions.
21. Remove lockout and operate unit for approximately 60 seconds to let inboard/center bearing mount self-adjust.
22. Lock out and tag all power supplies to equipment and controls. Tighten the two bearing setscrews.
1
23. Reinstall the coil baffle using the six
/4in. head screws that attach the coil baffle to the coil section. See Item 5 in Fig. 37.
24. Reinstall
1
/4in. head screws along length of unit securing
coil baffle to the blower section. See Item 5 in Fig. 37.
25. Reinstall optional vanes and screens and install top panel (40UV). Reinstall top (40UV) or front (40UH) discharge plenum and ductwork if required or discharge grille.
26. Reinstall front (40UV) or bottom (40UH) panels. Rein­stall end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH) match­es unit tag.
27. Restore power to unit.
57
Page 58
13
14
12
11
10
1
2
9
8
3
4
5
6
7
(SEE NOTE 5)
(SEE NOTE 5)
NOTES:
1. Not all components shown for clarity.
2. This drawing applies to 2000 cfm units only.
3. Remove shaft, motor and coupling prior to removing bearing. Refer to Ball Bearing Replacement instructions.
4. Install sleeve bearing with oil cup facing up and towards the rear of the assembly.
5. Refer to Fig. 36 for motor-coupling and shaft-coupling tolerances.
Fig. 40 — 40UH200 Ventilator Blower Drive Train Assembly
(SEE NOTE 4)
LEFT SIDE
VIEW
UNIT
BOTTOM
58
Page 59
9
SEE NOTE 2
8
10
12
11
7
1
2
(SEE NOTE 3)
3
6
5
NOTES:
1. Not all components shown for clarity.
2. Items no. 7, 16 and associated hardware not required for 40UV,UH150. Refer to Fig. 38 for 40UV,UH150 in-board bearing replacement.
3. Install motor with capacitor facing up.
4. Install sleeve bearing with oil cup facing up and towards the rear of the assembly.
Fig. 41 — 40UV,UH Ventilator Blower Drive Train Assembly —
40UV050-150 and 40UH075-150 Units (PSC Motor)
(SEE NOTE 4)
4
UNIT FRONT (40UV) UNIT BOTTOM (40UH)
59
Page 60
SEE NOTE 2
10
11
9
12
13
8
1
2
3
7
4
6
5
NOTES:
1. Not all components shown for clarity.
2. Items no. 7, 10 and associated hardware not required for 40UV,UH150. Refer to Fig. 38 for 40UV,UH150 in-board bearing replacement.
3. Install motor with electrical connections facing front of assembly.
4. Install oil cup facing up and towards the rear of the assembly.
Fig. 42 — 40UV,UH Ventilator Blower Drive Train Assembly —
40UV050-150 and 40UH075-150 Units (ECM Motor)
(SEE NOTE 4)
LEFT SIDE
VIEW
UNIT FRONT (40UV) UNIT BOTTOM (40UH)
60
Page 61
COUPLING
FAN SHAFT
+
.125 .032
–
BLOWER SECTION
FRONT VIEW
MOTOR SHAFT
MOTOR (PSC)
+
0.500 0.063
–
SHAFTED END FACE
COUPLING INSIDE FACE
COUPLING FACE
MOTOR BEARING FACE
FACE OF MOTOR FLUSH WITH FACE OF INSULATION
NOTES:
1. All dimensions shown in inches.
2. Not all components shown for clarity.
Fig. 43 — 40UV,UH Ventilator Blower Section Assembly — PSC Motor Detail
61
Page 62
Blower Wheel Removal and Reinstallation (Fig. 44) —
Fig. 41 for 40UV050-150 and 40UH075-125 units with PSC motors, Fig. 42 for 40UV050-125 and 40UH075-150 units with ECM motors.
Lock out and tag all power supplies to equipment and con­trols prior to servicing unit. Follow all safety codes. Failure to do so could result in personal injury.
The assembly order of the bearing installation is critical. Be careful with all components during removal and installa­tion. Any excessive force applied to these components can cause unintended damage and void unit warranty.
To remove blower wheel:
1. Turn off all power to the unit.
2. Remove blower section per service instructions in Blower
Assembly Removal and Reinstallation.
IMPORTANT: Tag each right front panel (40UV) or middle bottom panel (40UH) for each unit. Panels have electrical information specific to each unit.
3. Use
wheels (two per wheel).
4. Loosen inboard/center bearing setscrews (only on
40UV,UH150 and 200 size units).
5. If unit has ECM motor, remove motor shroud (sheet
metal cover — Fig. 40, Item 6; Fig. 42, Item 4) by remov­ing two
6. Loosen
Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3; Fig. 41, Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4; Fig. 41, Item 4; Fig. 42, Item 5), until motor housing (Fig. 40, Item 5; Fig. 41, Item 3; Fig. 42, Item 3) moves freely.
7. Slide shaft-coupling-motor assembly (Fig. 38, Items 3, 2,
1; Fig. 40, Items 5, 2, 10) out of wheels and unit until shaft clears inboard/center bearing assembly (30 in. max­imum clearance required from edge of frame end).
8. Remove four
blower housing(s) (Fig. 44, Item 7) to blower deck (Fig. 44, Item 3) and remove blower and wheel assembly.
9. Remove five
blower inlet ring (Fig. 44, Item 4) to blower housing and remove inlet ring.
10. Remove blower wheel(s) (Fig. 44, Item 8).
To reinstall blower wheel:
1. Install new blower wheel(s) (Fig. 44, Item 8). Ensure that
the fan blades are installed in the correct orientation (cup of blade towards discharge).
2. Install inlet ring (Fig. 44, Item 4) and install five ¼ in.
head screws (Fig. 44, Item 5) securing blower inlet ring to blower housing (Fig. 44, Item 7).
3. Install four
blower housing(s) (Fig. 44, Item 7) to blower deck (Fig. 44, Item 3).
Refer to Fig. 40 for 40UH200 units only,
5
/32in. hex tool to loosen setscrews on all blower
5
/16in. hex nuts. Do not discard cooling shroud.
5
/16in. motor mount (Fig. 40, Item 7; Fig. 41,
1
/4in. head screw (Fig. 44, Item 6) securing
1
/4in. head screws (Fig. 44, Item 5) securing
1
/4in. head screws (Fig. 44, Item 6) securing
4. Slide shaft-coupling-motor assembly (Fig. 38, Items 3, 2, 1; Fig. 40, Items 5, 2, 10) back into bearing and wheels.
Do not use excessive force. Damage to wheels may occur.
5. Insert shaft-coupling-motor assembly into wheels until motor clearance is as specified for motor type (PSC or ECM). See Fig. 43 or Fig. 36.
6. Ensure that motor shaft is perpendicular to motor blower endplate. Tighten
5
/16in. motor mount (Fig. 40, Item 7; Fig. 41, Item 2; Fig. 42, Item 2), nut (Fig. 40, Item 3; Fig. 41, Item 5; Fig. 42, Item 6), and bolt (Fig. 40, Item 4; Fig. 41, Item 4; Fig. 42, Item 5), until motor (Fig. 40, Item 5; Fig. 41, Item 3; Fig. 42, Item 3) is secure.
7. Install motor shroud (sheet metal cover — Fig. 40, Item 6; Fig. 41; Fig. 42, Item 4) using two
5
/16in. hex nuts
if using ECM motor. Align “window” with receptacles on motor. Motor control module could overheat and fail if
operated without cooling shroud.
8. Reinstall blower section into frame assembly. See Fig. 37.
5
9. Tighten the four
/16in. nuts retaining blower section to
frame.
5
10. Tighten the two
/16in. (Fig. 38, Item 6) nuts retaining the inboard bearing bracket to the pipe chase (only on 40UV,UH150 and 200 size units).
11. Reinstall two carriage bolts (Fig. 37, Item 6) that attach the front brace to the frame sides.
12. Re-attach green ground wire that connects the motor to the frame with
1
/4in. head screw if unit has a PSC motor.
ECM motors are grounded through the harness.
13. Re-attach wiring harness connector(s) to motor.
14. Center each wheel in its respective housing and tighten wheel setscrews (two for each wheel).
1
15. Reinstall one
/4in. head screw (Fig. 37, Item 1) at center
of blower deck attaching blower deck to pipe chase.
16. Reinstall the four
1
/4in. head screws (Fig. 37, Item 2)
holding the blower section sides to the coil section sides.
17. Rotate the fan shaft by hand to ensure that fans are unrestricted and can rotate freely. Check for any fan obstructions.
18. Remove lockout and operate unit for approximately 60 seconds to let inboard/center bearing mount self-adjust (only on 40UV,UH150 and 200 size units).
19. Lock out and tag all power supplies to equipment and controls. Tighten the two bearing setscrews (only on 40UV,UH150 and 200 size units). See Fig. 38, 40 or 44.
1
20. Reinstall the coil baffle using the six
/4in. head screws that attach the coil baffle to the coil section. See Item 4 in Fig. 37.
1
21. Reinstall
/4in. head screws along length of unit securing
coil baffle to the blower section. See Item 5 in Fig. 37.
22. Reinstall optional vanes and screens and install top panel (40UV). Reinstall top (40UV) or front (40UH) discharge plenum and ductwork if required or discharge grille.
23. Reinstall front (40UV) or bottom (40UH) panels. Rein­stall end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH) match­es unit tag.
24. Restore power to unit.
62
Page 63
Sleeve Bearing Replacement (40UV050-125, 40UH075-125 and 40UH200 Units Only) (Fig. 44) —
Fig. 41 for 40UV050-150 and 40UH075-125 units with PSC motors, Fig. 42 for 40UV050-125 and 40UH075-150 units with ECM motors.
Lock out and tag all power supplies to equipment and con­trols prior to servicing unit. Follow all safety codes. Failure to do so could result in personal injury.
The assembly order of the bearing installation is critical. Be careful with all components during removal and installa­tion. Any excessive force applied to these components can cause unintended damage and void unit warranty.
To replace ball bearing:
1. Turn off all power to unit.
IMPORTANT: Tag each right front panel (40UV) or middle bottom panel (40UH) for each unit. Panels have electrical information specific to each unit.
2. Use front (40UV) or bottom (40UH) panels and right (motor end) end panel.
3. Remove length of unit that secure coil baffle to blower section and remove front coil baffle.
4. Remove left blower section end (Item 2 in Fig. 44) insu­lation (Item 1 in Fig. 44).
5. Use Fig. 41, Item 8; Fig. 42, Item 9) securing end bearing bracket (Fig. 40, Item 12; Fig. 41, Item 7; Fig. 42, Item 8) to blower section end.
6. Remove bearing bracket assembly (Fig. 40, Items 12, 14, 13, 11; Fig. 41, Items 7, 10, 9, 11; Fig. 42, Items 8, 11, 10,
12) from blower section end. Use care to slide assembly
Refer to Fig. 40 for 40UH200 units only,
5
/32in. hex (Allen) tool or3/8in. nut driver to remove
1
/4in. head screws (Item 5 in Fig. 37) along
7
/16in. socket to remove hex nuts (Fig. 40, Item 13;
off of shaft end. Hold shaft from inside blower section
to prevent wheel damage.
7. Use
1
/2in. socket and1/2in. combination wrench to remove hex nuts (Fig. 40, Item 13; Fig. 41, Item 9; Fig. 42, Item 10) and bolts (Fig. 40, Item 11; Fig. 41, Item 11; Fig. 42, Item 12) holding bearing (Fig. 40, Item 14; Fig. 41, Item 10; Fig. 42, Item 11) and bearing bracket (Fig. 40, Item 12; Fig. 41, Item 7; Fig. 42, Item 8) together.
Ensure sleeve bearing is installed with oil cup facing upwards as shown in left side view.
8. Replace bearing (Fig. 40, Item 14; Fig. 41, Item 10; Fig. 42, Item 11). Attach to bearing bracket using hex nuts and bolts. Align oil cup port with matching cutout in bearing bracket.
9. Use
7
/16in. socket to slide replacement bearing (Fig. 40, Item 14; Fig. 41, Item 10; Fig. 42, Item 11) on to the end of shaft and install bearing bracket assembly (Fig. 40, Items 12, 14, 13, 11; Fig. 41, Items 7, 10, 9, 11; Fig. 42, Items 8, 11, 10, 12) in blower section end. Attach using hex nuts.
10. Add 5 to 10 drops of SAE 20 or 30 non-detergent based oil to bearing.
11. Rotate the fan shaft by hand to ensure that fans are unrestricted and can rotate freely. Check for any fan obstructions.
12. Reinstall left blower section end insulation (Item 1 in Fig. 44).
1
13. Reinstall
/4in.headscrews(Item5inFig.37)along
length of unit securing coil baffle to the blower section.
14. Reinstall front (40UV) or bottom (40UH) panels. Rein­stall end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH) match­es unit tag.
15. Restore power to unit.
63
Page 64
AUTOMATIC RESET
1
HIGH TEMPERATURE LIMIT SWITCH (SEE NOTES 2,3) (SEE CAUTION)
2
3
8
4
MANUAL RESET HIGH TEMPERATURE LIMIT SWITCH (SEE NOTES 2,3) (SEE CAUTION)
5
7
6
DISCHARGE AIR TEMPERATURE SENSOR (OPTIONAL) OPENING
t
DO NOT CHANGE LIMIT SWITCH CAPILLARY TUBE LOCA­TION! LIMIT SWITCHES MAY NOT FUNCTION PROPERLY.
NOTES:
1. Not all components shown for clarity.
2. Supplied on electric heat units only.
3. Secure capillary tubes to blower housing using high temperature cable tie. Capillary tube lengths will vary depending on unit size.
Fig. 44 — 40UV,UH Ventilator Blower Section Assembly Sheet Metal (All Units)
64
RETURN AIR TEMPERATURE SENSOR (OPTIONAL) OPENING
MOTOR AND COUPLING SETSCREW ACCESS
Page 65
Damper Section Removal and Reinstallation (Fig. 45)
Lock out and tag all power supplies to equipment and con­trols prior to servicing unit. Follow all safety codes. Failure to do so could result in personal injury.
The assembly order of the bearing installation is critical. Be careful with all components during removal and installa­tion. Any excessive force applied to these components can cause unintended damage and void unit warranty.
To remove damper section:
1. Turn off all power to unit.
IMPORTANT: Tag each right front panel (40UV) or middle bottom panel (40UH) for each unit. Panels have electrical information specific to each unit.
5
2. Use
3. Remove four carriage bolts and nuts securing kickplate to
/32in. hex (Allen) tool or3/8in. nut driver to remove front (40UV) or bottom (40UH) panels and right end panels.
end frames.
IMPORTANT: Tag kickplate for each unit. Kickplate has electrical information specific to each unit.
4. Remove the two
1
/4in. head screws securing kickplate to the damper sides (one on each side) and remove kickplate.
5. Remove
1
/4in. head screws attaching outside air (OA) actuator to damper shaft or attaching locking quadrant as­sembly to damper shaft. Remove OA actuator or locking quadrant assembly.
1
6. Remove six
/4in. head screws (3 per side) securing
damper to 40UH unit rear panel.
7. Remove two
5
/16in. nuts attaching damper assembly to
back frame.
8. Remove damper assembly from unit.
To replace damper section:
1. Replace damper assembly into unit.
2. Replace
5
/16in. nuts attaching damper assembly to back
frame.
1
3. Replace six
/4in. head screws (3 per side) securing
damper to 40UH unit rear panel.
4. Replace
1
/4in. head screws attaching OA actuator to damper shaft OR attaching locking quadrant assembly to damper shaft. Replace OA actuator or locking quadrant assembly.
1
5. Replace the two
/4in. head screws securing kickplate to the damper sides (one on each side) and remove kickplate.
6. Replace four carriage bolts and nuts securing kickplate to end frames.
7. Reinstall front (40UV) or bottom (40UH) panels. Rein­stall end panels. Ensure that tag on each right front
panel (40UV) or middle bottom panel (40UH) match­es unit tag.
8. Restore power to the unit.
65
Page 66
RETURN AIR TEMPERATURE SENSOR OPENING
FRONT COIL BAFFLE
DISCHARGE AIR TEMPERATURE SENSOR OPENING
DAMPER SECTION
MOTOR & COUPLING SETSCREW ACCESS
COIL SECTION
MOTOR
MOTOR ELECTRICAL BOX
DAMPER SECTION
KICKPLATE
NOTES:
1. Unit shown in vertical orientation. Drawing applies to horizontal and vertical units.
2. Not all components shown for clarity.
BLOWER SECTION
Fig. 45 — 40UV,UH Ventilator Damper Section Removal/Installation
66
Page 67
TESTING
The Unit Ventilator Comfort Control module is designed for easy checkout and commissioning using the Carrier Comfort Network® (CCN) Service Tool. An RJ14 service connector jack is provided on each control board, which eliminates the need to modify any communication wiring when service is required. See Fig. 26.
Before any testing is performed, be sure all configuration has been completed and the device address and bus number have been changed from the factory defaults.
NOTE: No two devices should use the same address even if they are not connected to the CCN system. The Comfort Con­troller uses this unique addressing to provide a restart delay upon returning from a power failure and a start delay during normal operation. This prevents excessive demand by stagger­ing the start time for each piece of equipment using a Unit Ventilator Comfort Controller.
To test the Comfort Controller, perform the following procedure:
1. The controller database must be uploaded into the Net­work Service Tool which will be used to perform the testing. This will allow access to all the necessary con­figuration and status information. Follow the operating instructions provided with the service tool and perform the controller upload.
2. With the control switch in the CONT position, apply power to the control. Verify the red LED on the control board flashes ON and OFF at a 1-second rate. It may take up to 5 seconds for this to occur initially as the control board is performing a self-health diagnostic check. Verify the fan starts to operate.
3. Using the Network Service Tool, select the controller to be tested from the menu provided, then select the DISPLAY function.
4. Using a digital thermometer to initially check and ver­ify the temperature sensor, check the temperature val­ues for the space/return air sensor, the supply air sensor, and the mixed air and outdoor-air sensors if installed. If an error exists between the actual value and the displayed reading, determine the difference between the two values, and enter a set point Trim (see Table 24) in the configuration table for the appropriate sensor. No correction is required for the supply air sen­sor. If this sensor has more than a ± 5 degree F error, replace the sensor.
5. Next, test the controller inputs and outputs as applica­ble. Verify that all modulating outputs are driven fully closed after power has been applied to the controller for at least 3 minutes. Verify that each water valve and the outdoor-air damper are fully closed. Use the proce­dures below to test the inputs and outputs as applicable to each control.
NOTE: The control drives all modulating outputs, which have been configured, closed when first returning from a power fail­ure restart, regardless of whether an output is normally open, normally closed, or non-spring return type.
Water Valve Tests
The manual positioning lever on all water valves should only be used when controller power is OFF. DO NOT attempt to move this lever when controller power is applied. If the position lever does not move freely for man­ual positioning when the power is off, remove the valve cover and push the solenoid plunger down using a small screwdriver inserted in the slot below the solenoid.
MODULATING COOLING CONTROL — If a modulating chilled type water valve is used, verify that valve position is fully closed while the unit is unoccupied and the fan is OFF. Using the Network Service Tool, page down to the bottom of the Points Display screen and select the COOLING 2 output. Force the output to OFF. Next, select the COOLING 1 output and force this output ON. Verify the chilled water valve begins to open. Allow the valve to fully open and check to ensure the valve reaches its full stroke and does not stick or bind. After the valve has stopped opening, select the COOLING 2 output and force it to ON. The force placed earlier on the COOLING 1 output should be removed automatically and the chilled water valve should begin to close. After the valve has fully closed, remove any forces from the COOLING 1 and COOLING 2 outputs.
HEATING VALVES — If a modulating hot water or steam type heating valve is used, verify the position of the valve is fully closed while the unit is unoccupied and the fan is OFF. Using the Network Service Tool, page down to the bottom of the Points Display screen and select the HEATING 2 output. Force the output to OFF. Next, select the HEATING 1 output and force this output ON. Verify the heating valve begins to open. Allow the valve to fully open and check to ensure the valve reaches its full stroke and does not stick or bind. After the valve has stopped opening, select the HEATING 2 output and force it to ON. The force placed earlier on the HEATING 1 out­put should be removed automatically and the heating valve should begin to close. After the valve has fully closed, remove any forces from the HEATING 1 and HEATING 2 outputs.
Face and Bypass Damper Tests
COOLING CONTROL — For units equipped with cooling, verify that the face and bypass damper is in the full coil bypass position when the unit is unoccupied and the fan is off. Verify that the switch position indicator on the face and bypass damp­er actuator is pointing to the zero (0) position at this time. Verify the cooling valve is closed.
Using the Network Service Tool, page down to the bottom of the Status display screen and select the Heating Enable Out­put point. Force this output to OFF. Next, select the Cooling Enable Output and force this point to ON. Select the COOL­ING 2 output and force this point to OFF. Select the COOL­ING 1 output and force this point to ON. Verify the face and bypass damper begins to move toward the coil face position and the cooling valve opens. Check to ensure the valve reaches the full open position and the damper moves to the coil face po­sition without sticking or binding. After the damper reaches the full coil face position, select the COOLING 2 output and force it to ON. The force placed earlier on the COOLING 1 output should be removed automatically, and the damper should begin moving toward the bypass position. After the face and bypass damper is in the bypass position, force the Cooling Enable Out­put to OFF. Verify the cooling valve is closed or closing. After the valve has fully closed, remove any forces from the COOL­ING 2, Heating Enable, or Cooling Enable Outputs.
HEATING CONTROL — For units equipped with heating, verify that the face and bypass damper is in the full coil bypass position when the unit is unoccupied and the fan is off. Verify that the switch position indicator on the face and bypass damp­er actuator is pointing to the zero (0) position at this time. Verify the heating valve is closed.
Using the Network Service tool, page down to the bottom of the Points display screen and select the Cooling Enable Output point. Force this output to OFF. Next, select the Heating Enable Output and force this point to ON. Select the HEATING 2 out­put and force this point to OFF. Select the HEATING 1 output and force this point to ON. Verify the face and bypass damper begins to move toward the coil face position and the heating valve opens. Check to ensure the valve reaches the full open position and the damper moves to the coil face position without
67
Page 68
sticking or binding. After the damper reaches the full coil face position, select the HEATING 2 output and force it to ON. The force placed earlier on the HEATING 1 output should be re­moved automatically, and the damper should begin moving to­ward the bypass position. After the face and bypass damper is in the bypass position, verify the heating valve is closing. After the valve has fully closed, remove any forces from the HEAT­ING 2, Heating Enable, or Cooling Enable Outputs.
Dampers
MODULATING OUTDOOR (OA) AIR DAMPER — Veri­fy the position of the OA damper is fully closed off to outdoor air when the unit is off or unoccupied. Using the Network Ser­vice Tool, page down to the bottom of the Status Display screen and select the MIXED AIR DAMPER 2 output. Force the output to OFF. Next, select the MIXED AIR DAMPER 1 output and force this output ON. Verify the dampers begin to open to outdoor air while closing off the return air damper. Al­low the dampers to fully open and check to ensure the outdoor­air damper reaches its full open position and does not stick or bind. After the damper has stopped opening, disconnect power to the controller by setting the control to OFF. Verify the spring return feature fully opens the return air damper while the out­door-air damper fully closes. Return the control switch to CONT and wait for the damper to again fully open to the out­door air.
After the outdoor-air damper is fully open, select the MIXED AIR DAMPER 2 output and force it to ON. The force placed earlier on the MIXED AIR DAMPER 1 output should be removed automatically. The outdoor-air dampers should be­gin to close while the return air damper begins to open. After the outdoor-air dampers fully close, remove any forces from the two outputs.
Fan Tests — The Unit Ventilator Comfort Control module
provides a fan relay output which starts and stops the fan when the control switch is in the AUTO position. A three-speed out­put control is used to switch the fan from LOW speed to MEDIUM or HIGH speed as required by the load.
FAN RELAY OUTPUT — Set the control switch to the AUTO position and using the Network Service Tool, select the Status Display screen and verify the FAN STATUS and FAN RELAY both read OFF. Set the control switch to the AUTO position. Select the FAN RELAY and force the point to ON. Verify the fan starts and the FAN STATUS changes within 10 seconds. Reselect the FAN RELAY and force the point to OFF. Verify the fan stops and the fan status changes to OFF. Remove any force applied.
THREE-SPEED FAN — To verify proper operation of the fan speed control, the unit must be in the Unoccupied mode. With the fan stopped, set the control switch to the CONT posi­tion. Verify the fan operates at low speed. Using the Network Service Tool, page down through the Maintenance screen and locate the FAN SPEED RELAY 1 point. Force the FAN SPEED RELAY 1 output to ON. Verify the fan speed increases to MEDIUM. Select the FAN SPEED RELAY 2 output and force this point to ON. Verify the fan speed increases to HIGH. Remove any forces from FAN SPEED RELAY 1 and FAN SPEED RELAY 2.
FAN STATUS — Set the control switch in the OFF position. Using the Network Service Tool, select the Points Display screen and verify the Supply Fan Status reads OFF. Set the con­trol switch to the CONT position and verify the fan is operat­ing. Verify the Supply Fan Status reads ON.
Filter Maintenance — For units connected to a CCN
system, a dirty filter alarm is generated and reported as soon as the operating hours of the unit exceed the configured filter maintenance interval. This is a software function of the control­ler and does not require any testing.
To reset the alarm after the filters have been serviced, use the Network Service Tool and select the filter status from the Status Display screen. Force the point to CLEAN. After wait­ing 10 seconds, remove the force using the AUTO command. This will reset the timer and reset the displayed value to CLEAN.
Remote Start Input — Set the control switch to the
OFF position and using the Network Service Tool, select the Status Display screen and verify the FAN STATUS and FAN RELAY both read OFF. Set the control switch to the AUTO position. Using a jumper wire, temporarily jumper terminals TB to T20 of the control board. Verify the FAN RELAY reads ON, the fan starts and the FAN STATUS changes from OFF. From the Status Display screen, determine the operating MODE. Remove the jumper. If the operating mode previously was cooling, the MODE will change to FAN ONLY as soon as the jumper is removed. The fan will continue to operate for 5 minutes. For all other modes, the fan should stop within 5 seconds after the jumper is removed.
Sensors
AIR QUALITY SENSOR OPTION — Using the Network Service Tool, select the Status Display screen and verify the Air Quality (CO the sensor is configured for a 2 to 10 vdc output over a 0 to 2000 ppm sensing range. The hardware jumper inside the sen­sor near the terminal connection block must also be installed in the proper position for a voltage output. Any further sensor checkout requires the use of the User Interface Program and a calibration gas to provide an accurate verification. Refer to the instructions provided in the calibration gas kit and the User In­terface Program for operation of these items.
HUMIDITY SENSOR OPTION — Using the Network Ser­vice Tool, select the Status display screen and verify the Rela­tive Humidity reads the proper value. Be sure the local RH sen­sor decision in the CCN Configuration table has been set to YES. The 499-ohm resistor, which has been factory-supplied with the sensor, must also be correctly installed. Use a sling psychrometer or local humidity sensor to verify the sensor is reading properly.
sensor) reads at least 300 ppm. Verify
2
Fire Shutdown Option — Using the Network Service
Tool, select the Status display screen and verify the Fire Shut­down status reads NORMAL when the local smoke or fire de­tector is in the normal state. Set the control switch to the AUTO position, and force the FAN RELAY output ON. Verify the fan start and the FAN STATUS reads ON. Trip the local smoke de­tector or fire detector and verify the Fire Shutdown input reads ALARM, the supply fan immediately stops, and the FAN STATUS reads OFF. Place the control switch in the CONT position and verify the supply fan remains off. Reset the smoke or fire detector and verify the supply fan restarts. Remove all previous forces and set the control switch back to the OFF position.
Electric Heat and Direct Expansion Cool­ing —
functions utilize both mechanical and software integrated safe­ties which prevent the testing of these functions independently of the equipment operation. These require that the equipment be operating in order to prevent equipment damage. All previ­ous testing must be completed prior to performing any DX and electric heat tests.
ELECTRIC HEAT — Set the control switch to the OFF posi­tion. Using the Network Service Tool, select the Status Display screen and verify the FAN STATUS and FAN RELAY both read OFF. Verify a controlling temperature of 85 F or less. If not, force the value to 70 F. Set the control switch to the AUTO position. Select the Remote Start point and force the point to ON. Verify the fan starts and the FAN STATUS changes. Select the Set Point screen and increase the Occupied Switch Set
Electric heat and direct expansion cooling control
68
Page 69
Point to 90 F. Select the Points Display screen and verify the Heating 1 output reads ON. If two stages are used, verify the second stage is set to ON within two minutes. Verify both elec­tric heat control relays are energized. Verify the electric heater stage(s) are enabled and that the supply-air temperature in­creases. Select the Set Point screen and return the set points to their original values. Reselect the Remote Start input and set the point to AUTO. Verify the supply fan stops and the Fan Sta­tus changes to OFF. Reselect the Controlling Temperature point and AUTO this point if it had previously been forced.
DIRECT EXPANSION COOLING — Set the control switch to the OFF position and the condensing unit disconnect to OFF. Using the Network Service Tool, select the Points Display screen and verify the FAN STATUS and FAN RELAY both read OFF. Verify the Controlling Temperature is greater than 55 F. If not, force the value to 70 F. Set the control switch to the AUTO position. Select the Remote Start point and force the points to ON. Verify the fan starts and the FAN STATUS changes. Select the Set Point screen and decrease the Occupied Heating Set point to 40 F and decrease the Occupied Cooling set point to 45 F. Verify the outdoor-air temperature reads above the configured DX Outdoor Air Lockout value. If not, force the Outside-Air Temperature to 90 F. Select the Points Display screen and verify the Cooling 1 output reads ON. If two stages are used, verify the second stage is set to ON within 2 minutes. Verify both accessory relays are energized. Set the condensing unit disconnect to ON. Verify the DX cooling stage(s) are enabled and that the supply-air temperature decreases. Allow the unit to operate for 2 minutes minimum. Select the Set Point screen and return the set points back to their original values. Reselect the Remote Start input and AUTO the point. Verify the mode changes to Fan Only. Rese­lect the Controlling Temperature point and AUTO this point if it had previously been forced. Reselect the Outside-Air Temperature point and AUTO this point if it had previously been forced. Allow the fan to operate to evaporate the conden­sate from the coil. The supply fan will stop automatically after approximately 5 minutes.
Mixed-Air Damper Sensor Final Calibra­tion — The mixed-air damper control uses a temperature dif-
ference method to maintain the minimum outdoor-air ventila­tion. For this reason, it is important that the sensors be calibrat­ed to ensure that the desired quantity of outdoor air is provided at any operating speed.
IMPORTANT: The Comfort Controller requires that each unit be equipped with its own outdoor-air sensor installed for mixing box applications. A broadcasted OAT value from a single location will not ensure that the outdoor-air temperature is being correctly measured for an individual unit.
To perform a final calibration for the sensors:
1. Set the control switch to the OFF position and using the Network Service Tool, select the Display screen and verify the FAN STATUS and FAN RELAY both read OFF.
2. Set the control switch to the CONT position.
3. Using the Network Service Tool, page down to the bottom of the Points Display screen and select the MIXED-AIR DAMPER 2 OUTPUT. Force the output to OFF.
4. Next, select the MIXED-AIR DAMPER 1 output and force this output ON. Wait for the dampers to fully open to outdoor air while closing off the return-air damper. Allow the unit to operate for 5 minutes after the OA damper reaches its fully open position.
5. Verify the mixed-air temperature is within 0.3° F of the outdoor-air temperature value. Using the OAT (Fig. 24) function, adjust the Outdoor-Air Value so that both sensors read the same relative temperature. (The values should have been previously verified for accu­racy earlier.)
6. Select the MIXED AIR DAMPER 2 output and force it to ON. The force placed earlier on the MIXED-AIR DAMPER 1 output should be removed automatically and the OA dampers should begin to close while the return-air damper begins to open.
7. After the OA dampers fully close, allow the unit to operate for 5 minutes. Verify the return-air temperature is within 0.3° F of the mixed-air temperature reading. If not, adjust the return-air temperature reading using the OAT (Fig. 24) function so that both sensors read thesametemperature.(Thevalueofthemixed-air temperature and outdoor-air temperature were previ­ously trimmed and should not be readjusted.)
8. Reselect the FAN RELAY and force the point to OFF. Verify the fan stops and the FAN STATUS changes to OFF. Remove the forces previously placed on the MIXED-AIR DAMPER 1 and 2 outputs.
Testing Completion — After all checkout and testing
has been completed, set the controller time by using the Build­ing Time feature of the Network Service Tool (do NOT use the Controller Time Function). After disconnecting from the unit, CYCLE THE UNIT POWER to reset the valve and damper positions and restore automatic control. Although the Unit Ventilator Comfort Control module will not respond, the controller will begin to maintain a software clock so that any Network Alarm message will contain the correct time and date stamp.
Additionally, the database for each control should be stored on a 3.5 in. computer disk for future service use. The CCN Net­work Service provides an Export function for this. Refer to the Service Tool operating instructions for further information. The database disk will provide an easy method of reprogramming a control board should it ever become necessary to replace it. All the control configuration, set points, sensor trim information, and controller addressing information is stored for easy down­loading into a replacement control board assembly.
Unit Diagnostics and Troubleshooting — See
Table 30 for 40UV,UH diagnostics and troubleshooting information.
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Table 30 — Unit Diagnostics And Troubleshooting
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Unit Does Not Operate Power to control is OFF Check local disconnect or circuit breaker.
No Heating Heating is forced disabled Verify no forces are present in the Heating 1, Heating 2 or
No Cooling Cooling is forced disabled Verify no forces are present in the Cooling 1, Cooling 2 or
Overheating Heat outputs are forced Verify no forces are present on the Heating 1 or Heating 2
Overcooling Cooling outputs are forced Verify no forces are present on the Cooling 1 or Cooling 2
Mixed Air Damper Will Not Operate
Damper Fails to Operate Properly at Minimum Position
Temperature Sensor Not Reading Correctly
Remote Start/Stop (S/S)jumper not installed (for stand-alone operation only)
Faulty connections Check LED on control board. If not flashing at a 1-second
Control switch is in OFF position or safety controls are tripped
Smoke or fire detector is tripped, detector wiring shorted
No hot water/steam/electricity Check source and correct any problems. Electric heater safety tripped Determine cause for safety trip, typically insufficient air-
Configuration error Verify the control is configured properly for the type of
No power to valve or relays Check for 24 vac at water valve. If no power, check for
End switch improperly set (on Face and Bypass units only)
Incorrect sensor reading Verify the temperature sensors are reading the correct
No fan status Verify the Fan Status reads ON. Fan Status must read ON
No chilled water/electricity Check source and correct any problems. Condensing unit safety tripped Determine cause for safety trip, correct condition and
Configuration error Verify the control is configured properly for the type of
No power to valve or relays Check for 24 vac at water valve. If no power, check for
Outdoor air temperature below DX outdoor air lock­out
End switch improperly set (on Face and Bypass units only)
Incorrect sensor reading Verify the temperature sensors are reading the correct
No fan status Verify the Fan Status reads ON. Fan Status must read ON
Configuration error Verify the control is configured properly for the type of
Configuration error Verify the control is configured properly for the type of
Dampers are forced Verify no forces are present on the MIX1orMIX2 outputs.
No power to actuator Check for 24 vac. If no power, check for open wiring. Configuration error Verify the control is properly configured for modulating
Failed sensor (shortened or open) Verify the temperature sensors are reading correctly.
No fan status Verify the Fan Status reads ON. Fan Status must read ON
Incorrectly calibrated sensors Verify sensors are properly calibrated (refer to the test
Loose connections Verify all sensor lead connections are securely fastened. Sensor out of calibration Recheck each sensor reading using a digital thermometer
Install jumper between T20 on control module and TB (24 vac).
rate, check for loose connections and 24 vac on POWER connector.
Verify control switch is in the AUTO or CONT position. Check for a tripped LLT.
Check the status of the Fire Shutdown input. Determine cause of detector trip and correct if necessary. Check for shorted wiring and correct if necessary.
Heating Enable outputs; remove if necessary.
flow. Correct condition and reset safety switch in heater control box.
heat used.
open wiring. Refer to Face and Bypass Damper testing to verify proper
operation of end switch and water valves.
temperatures.
for heat to operate.
Heating Enable outputs; remove if necessary.
reset safety switch in condensing unit control box.
cooling used.
open wiring. Ver if y D XOutdoor Air Lockout is correctly set to the mini-
mum recommended condensing unit operating tempera­ture. Verify OAT sensor is reading correctly.
Refer to Face and Bypass Damper Tests to verify proper operation of end switch and water valves.
temperatures.
for cooling to operate.
outputs. Remove if necessary.
heating used.
outputs. Remove if necessary.
cooling used.
Remove if necessary.
type OA damper.
Replace any bad sensor.
for dampers to operate.
section and repeat the calibration procedure).Verifyno forces are present on MAT, OAT, o r S P T.
as a reference. Reset the TRIM value to zero before test­ing each sensor (OAT, MAT, and RAT/SPT). Replace any sensor requiring more than 5 degrees of correction.
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Table 30 — Unit Diagnostics and Troubleshooting (cont)
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION Indoor Air Quality (IAQ)
Features Malfunctioning
LLT Trips Frequently LLT switch malfunctioning Replace LLT switch.
IAQ Level Exceeds Set Point Frequently (Generated Alarms)
LEGEND
DX — Direct Expansion IAQ — Indoor Air Quality LED — Light Emitting Diode LLT — Low-Limit Thermostat MAT — Mixed-Air Temperature Sensor MIX1 — Mixed Air 1Terminal MIX2 — Mixed Air 2 Terminal OA — Outdoor Air OAT — Outdoor-Air Temperature Sensor RH — Relative Humidity RAT — Return-Air Temperature SPT — Space Temperature Sensor TB — Terminal Box
IAQ not enabled Enable IAQ control operation. Set point too high/too low Adjust the set point to the correct value. Space or return air temperature too high/low Control will resume when space/returns temperatures
Space Relative Humidity too high Control will resume when relative humidity recovers.
MAT sensor is shorted, open, or forced Normal operation will resume when MAT sensor is
MAT sensor failed or out of calibration Verify MAT sensor is reading correctly. Trim or replace if
Maximum output value set too low Verify maximum output value has been correctly set.
OAT sensor failed or open Normal operation will resume when OAT sensor is
recover.
Verify high humidity limit is configured properly. Reset to 100% if RH control is not used.
operating properly. Remove Force; repair or replace MAT sensor.
necessary.
Increase value in 10% increments.
repaired.
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Copyright 2005 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 3 Ta b 2 a
Catalog No. 534-094 Printed in U.S.A. Form 40UV,UH-6SI Pg 72 1-06A 7-05 Replaces: 40UV,UH-3SI
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