Carrier 50TC User Manual

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Page 1

50TC---*16

Single Package Rooftop Cooling Only with Puronr (R---410A) Refrigerant Size 16

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 2....................

INSTALLATION 4...............................

Jobsite Survey 4................................

Step 1 -- Plan for Unit Location 4..................

Roof Mount 5...............................

Step 2 -- Plan for Sequence of Unit Installation 5......

Curb--Mount Installation 5.....................

Pad--Mount Installation 5......................

Frame--Mount Installation 5....................

Step 3 -- Inspect Unit 5...........................

Step 4 -- Provide Unit Support 5...................

Roof Curb Mount 5..........................

Slab Mount (Horizontal Units Only) 5...........

Alternate Unit Support

(In Lieu of Curb or Slab Mount) 5..............

Step 5 -- Field Fabricate Ductwork 7................

For Units with Accessory Electric Heaters 7......

Step 6 -- Rig and Place Unit 7.....................

Positioning on Curb 8........................

Step 7 -- Convert to Horizontal & Connect Ductwork 9..

Step 8 -- Install Outside Air Hood 9................

Economizer Hood Removal and Setup —

Factory Option 9............................

Two Position Damper Hood Removal and Setup —

Factory Option 9............................

Economizer Hood and Two--Position Hood 10.....

Step 9 -- Install External Condensate Trap and Line 11...

Step 10 -- Make Electrical Connections 11...........

Field Power Supply 11........................

All Units 13................................

Units without Factory--Installed Disconnect 13....

Units with Factory--Installed Disconnect 13.......

Convenience Outlets 13.......................

Factory--Option Thru--Base Connections 15.......

Units without Thru--Base Connections 16.........

Field Control Wiring 16.......................

Thermostat 16...............................

Unit without Thru--Base Connection Kit 16.......

Heat Anticipator Settings 17...................

Electric Heaters 17..............................

Single Point Boxes 17..........................

Heater and Supplementary Fuses 17.............

Heater Low--Voltage Control Connections 18......

Humidi--MiZer

Humidi--MiZer -- Space RH Controller 19........

PremierLinkt (Factory Option) 21.................

Supply Air Temperature (SAT) Sensor 24.........

Outdoor Air Temperature (OAT) Sensor 24.......

EconoMi$er2 24.............................

Field Connections 24..........................

Space Sensors 26............................

Connect Thermostat 26.......................

Configure the Unit for Thermostat Mode 26......

Economizer Controls 27........................

Indoor Air Quality (CO

Outdoor Air Quality Sensor 27.................

Space Relative Humidity Sensor or

Humidistat Connections 28....................

Smoke Detector/Fire Shutdown (FSD) 29.........

Filter Status Switch 29........................

Supply Fan Status Switch 29...................

Remote Occupied Switch 29...................

Power Exhaust (output) 29.....................

CCN Communication Bus 30..................

RTU Open Control System 31.....................

Supply Air Temperature (SAT) Sensor 34.........

Outdoor Air Temperature (OAT) Sensor 34.......

EconoMi$er2 34.............................

Field Connections 34..........................

Space Temperature (SPT) Sensors 35............

Indoor Air Quality (CO

Control Connections 19..........

sensor) 27.............

)Sensor 35.............

Page 2

Outdoor Air Quality Sensor 36.................

Space Relative Humidity Senor or Humidistat 36..

Smoke Detector/Fire Shutdown (FSD) 37.........

Connecting Discrete Inputs 37..................

Communication Wiring -- Protocols 38............

General 38.................................

Local Access 39.............................

RTU Open Troubleshooting 39.................

Outdoor Air Enthalpy Control 40..................

Differential Enthalpy Control 40................

Return Air Enthalpy Sensor 40.................

Smoke Detectors 41.............................

System 41..................................

Controller 41...............................

Sensor Module 41...........................

50TC--*16

Smoke Detector Locations 42....................

Supply Air 42...............................

Return Air without Economizer 42..............

Return Air with Economizer 42.................

Step 11 -- Adjust Factory--Installed Options 46........

Step 12 -- Install Accessories 47...................

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory--authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and appropriate national electrical codes (in USA, ANSI/NFPA70, National Electrical Code (NEC); in Canada, CSA C22.1) for special requirements.

It is important to recognize safety information. This is the safety--alert symbol

unit and in instructions or manuals, be alert to the potential for personal injury.

. When you see this symbol on the

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death.

Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lock(s) and lockout tag(s). Unit may have more than one power switch.

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal injury, death and/or equipment damage.

Puronr (R--410A) refrigerant systems operate at higher pressures than standard R--22 systems. Do not use R--22 service equipment or components on Puron refrigerant equipment.

WARNING

PERSONAL INJURY AND ENVIRONMENTAL HAZARD

Failure to follow this warning could cause personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal.

Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils.

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing air conditioning equipment.

Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety--alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

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Vertical Connections / Economizer

50TC--*16

Horizontal Connections / Economizer

Fig. 1 -- Unit Dimensional Drawing – 16 Size Unit

C10770

Page 4

50TC--*16

Fig. 1 -- Unit Dimensional Drawing – 16 Size Unit (cont.)

INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes and the NEC (National Electrical Code) ANSI/NFPA 70 for special installation requirements.

2. Determine unit location (from project plans) or select unit location.

3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.

Step 1 — Plan for Unit Location

Select a location for the unit and its support system (curb or other) that provides for at least the minimum clearances required for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around and above unit as specified in unit drawings. See Fig. 2.

NOTE: Consider also the effect of adjacent units. Unit may be installed directly on wood flooring or on Class

A, B, or C roof--covering material when roof curb is used Do not install unit in an indoor location. Do not locate air

inlets near exhaust vents, relief valves, or other sources of contaminated air.

C10858

18” (457)

42" (1067)

Required bottom condensate drain connection.

Otherwise, 36” (914mm) for condensate connection.

42" (1067)

C09897

Fig. 2 -- Service Clearance Dimensional Drawing

Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit.

Select a unit mounting system that provides adequate height to allow for removal and disposal of frost and ice that will form during the heating--defrost mode as well as allow installation of condensate trap per requirements. RefertoStep9—InstallExternalCondensate Trap and Line – for required trap dimensions.

Page 5

Roof Mount —

Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1.

Step 3 — Inspect Unit

Inspect unit for transportation damage. File any claim with transportation agency.

Table 1 – Operating Weights

50TC*D16

COMPONENT UNITS LB (KG)

Base Unit 1305 (593)

Economizer

Vertical 100 (45)

Horizontal 115 (52)

H u m id i --- M i Z erRSystem 62 (28)

Powered Outlet 32 (15)

Curb

14---in/356 mm 180 (82)

24---in/610 mm 235 (107)

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate different sequences for the steps of unit installation. For example, on curb--mounted units, some accessories must be installed on the unit before the unit is placed on the curb. Review the following for recommended sequences for installation steps.

Curb--mounted installation —

Install curb Install field--fabricated ductwork inside curb Complete installation of the factory--installed

thru--the--base service connection option Prepare bottom condensate drain connection to suit

planned condensate line routing (refer to Step 9 for details)

Rig and place unit Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

Pad--mounted installation —

Prepare pad and unit supports Check and tighten the bottom condensate drain

connection plug Rig and place unit Convert unit to side duct connection arrangement Install field--fabricated ductwork at unit duct openings Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

Frame--mounted installation —

Frame--mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in Fig. 3. Assemble and install accessory roof curb in accordance with instructions shipped with the curb.

NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 5. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are show in Fig. 4. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and

not to the unit.

IMPORTANT: If the unit’s electric and control wiring is to be routed through the basepan and the unit is equipped with the factory--installed Thru--the--Base service option see the following section:

S Factory--Option Thru--Base Connections

on page 15

If using the field--installed Thru--the--Base accessory follow the instructions provided with the accessory kit.

NOTE: If electrical connection is not going to occur at this time, tape or otherwise cover the fittings so that moisture does not get into the building or conduit in the interim.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of 6 in. (150 mm) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

Alternate Unit Support (InLieuofCurborSlabMount)—

A non--combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 3 equally spaced 4--in. x 4--in. (102 mm x 102 mm) pads on each side.

50TC--*16

Page 6

50TC--*16

Fig. 3 -- Roof Curb Details

C10772

Page 7

WARNING

Fig. 4 -- Unit Leveling Tolerances

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

A-B

0.5” (13)

B-C

1.0” (25)

A-C

1.0” (25)

C10001

Step 5 — Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition) shall not exceed 0.35 in. wg (87 Pa) with economizer or

0.45 in. wg (112 Pa) without economizer. For vertical ducted applications, secure all ducts to roof curb

and building structure. Do not connect ductwork to unit.

Fabricate supply ductwork so that the cross sectional dimensions are equal to or greater than the unit supply duct opening dimensions for the first 18 in. (458 mm) of duct length from the unit basepan.

Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes.

For Units with Accessory Electric Heaters —

All installations require a minimum clearance to combustible surfaces of 1--in (25 mm) from duct for first 12--in (305 mm) away from unit.

Outlet grilles must not lie directly below unit discharge. NOTE: A 90--degree elbow must be provided in the

ductwork to comply with UL (Underwriters Laboratories) code for use with electric heat.

PERSONAL INJURY HAZARD

Failure to follow this warning could cause personal injury.

For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90--degree turn in the return ductwork between the unit and the conditioned space. If a 90--degree elbow cannot be installed, then a grille of sufficient strength and density should be installed to prevent objects from falling into the conditioned space. Due to electric heater, supply duct will require 90--degree elbow.

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damage to roofing materials.

Membrane roofs can be cut by sharp sheet metal edges. Be careful when placing any sheet metal parts on such roof.

CAUTION

Step 6 — Rig and Place Unit

When the unit is ready to be rigged and no longer will be lifted by a fork truck, the wood protector under the basepan must be removed. Remove 4 screws from each base rail. Wood protector will drop to the ground. See instructions on the unit base rails.

Keep unit upright and do not drop. Spreader bars are required. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 and Fig. 5 for additional information.

Lifting holes are provided in base rails as shown in Fig. 5. Refer to rigging instructions on unit.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

All panels must be in place when rigging. Unit is not designed for handling by fork truck.

CAUTION

50TC--*16

Before setting the unit onto the curb, recheck gasketing on curb.

Page 8

“B”

914 - 1371

( 36” - 54” )

“C”

PLACE ALL SEAL STRIP IN PLACE BEFORE PLACING UNIT ON ROOF CURB.

“A”

SEE DETAIL “A”

MAX WEIGHT

LB KG IN MM IN MM IN MM

50TC--*16

UNIT

50TC---D16 2010 912 116.0 2945 57.5 1461 59.5 1510

NOTES:

1. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.

2. Dimensions in ( ) are in millimeters.

3. Hook rigging shac k les through holes in base rail, as shown in detail “ A.” Holes in base rails are centered around the unit center of gravi t y. Use wood en top to prevent rigging st rap s from damaging unit.

PositioningonCurb—

For full perimeter curbs CRRFCURB074A00 and 075A00, the clearance between the roof curb and the front and rear

base rails should be the curb and the end base rails should be

/4in (6.4 mm). The clearance between

/2in (13 mm). For retrofit applications with curbs CRRFCURB003A01 and 4A01, the unit should be position as shown in Fig. 6.

Maintain the 15.5 in (394 mm) and 8

clearances and allow the 22

/16in (567 mm) dimension to

/8in (220 mm)

float if necessary.

DUCT END

A B C

Fig. 5 -- Rigging Details

DIMENSIONS

DETAIL “A”

Original Position

C10774

New Position (moved 12.5 in.)

C10003

Fig. 6 -- Retrofit Installation Dimensions

If the alternative condensate drain location through the bottom of the unit is used in conjunction with a retrofit curb, the hole in the curb must be moved 12.5 in (320 mm) towards the duct end of the unit. (See Fig. 7.)

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

C10904

Fig. 7 -- Alternative Condensate Drain Hole Positions

IMPORTANT:

If the unit has the factory--installed Thru--the--Base option, make sure to complete installation of the option before placing the unit on the roof curb.

See the following section:

S Factory--Option Thru--Base Connections

on page 15

NOTE: If electrical connections is not going to occur at this time, tape or otherwise cover the fittings so that moisture does not get into the building or conduit in the interim.

Remove all shipping materials and top skid. Remove extra center post from the condenser end of the unit so that the condenser end of the unit matches Fig. 17 -- 19. Recycle or dispose of all shipping materials.

Page 9

Step 7 — Convert to Horizontal and Connect Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unit without factory--installed economizer or return air smoke detector option may be field--converted to horizontal ducted configuration using accessory CRDUCTCV001A00. To convert to horizontal configuration, remove screws from side duct opening covers and remove covers.

Discard the supply duct cover. Install accessory CRDUCTCV001A00 to cover the vertical supply duct opening. Use the return duct cover removed from the end panel to cover the vertical return duct opening.

Field--supplied flanges should be attached to horizontal duct openings and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing and mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork.

FILTER ACCESS PANEL

INDOOR COIL ACCESS PANEL

C10004

Fig. 9 -- Typical Access Panel Locations

50TC--*16

Fig. 8 -- Horizontal Conversion Panels

Step 8 — Install Outside Air Hood

Economizer Hood Removal and Setup -Factory Option —

1. The hood is shipped in knock--down form and located in the return air compartment. It is attached to the economizer using two plastic tie--wraps.

2. To gain access to the hood, remove the filter access panel. (See Fig. 9.)

3. Locate and cut the (2) plastic tie--wraps, being careful to not damage any wiring. (See Fig. 10.)

4. Carefully lift the hood assembly through the filter access opening and assemble per the steps outlined in Economizer Hood and Two–Position Hood on page 10.

Remove Hood Parts

Cut Plastic Ties (2) Places

Economizer

C06108

C10005

Fig. 10 -- Economizer Hood Package Location

Two Position Damper Hood Removal and Setup -Factory Option —

1. The hood is shipped in knock--down form and assembled to a metal support tray using plastic stretch wrap. Located in the return air compartment, the assembly’s metal tray is attached to the basepan and also attached to the damper using two plastic tie--wraps.

2. To gain access to the hood, remove the filter access panel. (See Fig. 9.)

3. Locate the (2) screws holding the metal tray to the basepan and remove. In order to remove the screws, it may be necessary to remove the panel underneath the two--position damper. Remove the two screws. Locate and cut the (2) plastic tie--wraps securing the assembly to the damper. (See Fig. 11.) Be careful to not damage any wiring or cut tie--wraps securing any wiring.

Page 10

4. Carefully lift the hood assembly (with metal tray) through the filter access opening and assemble per the steps outlined in Economizer Hood and Two–Position Hood, below.

5. If removed, reattach the panel under the damper.

Hood Parts

Plastic Tie Wrap Qty (2)

screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 13.

TOP PAN EL

INDOOR COIL ACCESS PANEL

SCREW

LEFT HOOD SIDE

50TC--*16

Screws for Metal Tray Qty (2)

Fig. 11 -- Two--Position Damper Hood Package Location

Economizer Hood and Two--Position Hood — NOTE: If the power exhaust accessory is to be installed

on the unit, the hood shipped with the unit will not be used and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly.

1. The indoor coil access panel will be used as the top of the hood. If the panel is still attached to the unit, remove the screws along the sides and bottom of the panel. See Fig. 12.

SIDE PAN EL

RAIN DEFLECTORS

C10006

HOOD DIVIDER

C10008

Fig. 13 -- Economizer Hood Construction

3. Remove the shipping tape holding the economizer barometric relief damper in place.

4. Insert the hood divider between the hood sides. See Fig. 13 and 14. Secure hood divider with 3 screws on each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.

5. Attach the post that separates the filters with the screws provided.

6. Open the filter clips which are located underneath the hood top. Insert the aluminum filters into the bottom filter rack (hood divider). Push the filter into position past the open filter clips. Close the filter clips to lock the filters into place. See Fig. 14.

DIVIDER

OUTSIDE AIR

TOP PAN EL

INDOOR COIL ACCESS PAN EL

C10007

INDOOR COIL ACCESS PAN EL

CAULK HERE

Fig. 12 -- Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert the

hood sides under the panel (hood top). Be careful not to lift the panel too far as it might fall out. Use the

HOOD

CLEANABLE ALUMINUM FILTER

BAROMETRIC RELIEF

FILTER

Fig. 14 -- Economizer Filter Installation

7. Install the two rain deflectors on the edge of the hood topasshowninFig.12.

8. Caulk the ends of the joint between the unit top panel and the hood top as shown in Fig. 12.

9. Replace the filter access panel.

FILTER CLIP

C10009

Page 11

Step 9 — Install External Condensate Trap and Line

The unit has one3/4-in. condensate drain connection on the end of the condensate pan and an alternate connection on the bottom. See Fig. 15. Unit airflow configuration does not determine which drain connection to use. Either drain connection can be used with vertical or horizontal applications.

When using the standard side drain connection, ensure the red plug in the alternate bottom connection is tight. Do this before setting the unit in place. The red drain pan can be tightened with a

To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a square socket drive extension) and install it in the side drain connection.

CONDENSATE PAN (SIDE VIEW)

STANDARD SIDE DRAIN

Fig. 15 -- Condensate Drain Pan (Side View)

/2--in. square socket drive extension.

/2-- i n .

DRAIN

PLUG

(FACTORY-INSTALLED)

ALTERNATE BOTTOM DRAIN

C08021

Step 10 — Make Electrical Connections

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code); ANSI/NFPA 70, latest edition (in Canada, Canadian Electrical Code CSA [Canadian Standards Association] C22.1), and local electrical codes.

NOTE: Field--supplied wiring shall conform with the limitations of minimum 63_F(33_C) rise.

Field Power Supply —

For those units without through--the--curb power, conduit must be used to route the main power from the condenser end, via the power entry in the corner post of the unit (see Figs. 17, 18 and 19) to either the factory option disconnect or the bottom of the control box. 1” conduit is provided wrapped around compressor. A second conduit is provided with factory installed powered convenience outlet. For those units that require conduit larger than 1”, it must be field supplied. Figs. 17, 18 and 19 show the various wire routings.

50TC--*16

The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 16.

MINIMUM PITCH 1” (25mm) PER 10’ (3m) OF LINE

TO ROOF DRAIN

NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended.

BASE RAIL

OPEN VENT

2˝ (51) MIN

DRAIN PLUG

SEE NOTE

ROOF CURB

C08022

Fig. 16 -- Condensate Drain Piping Details

All units must have an external trap for condensate drainage. Install a trap at least 4-in. (102 mm) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do not use a pipe size smaller than the unit connection

/4-in.).

(

C10010

Fig. 17 -- Conduit into Factory Option Disconnect

C10011

Fig. 18 -- Conduit into Control Box

Page 12

Fig. 19 -- Conduit into Single Point Box

If the field disconnect is larger than 100A, it must be attached to the unit using accessory CRDISBKT001A00 — disconnect switch bracket — (see Fig. 20). Follow the instructions provided with this accessory. For smaller field

disconnects, be sure to use

50TC--*16

disconnect directly to the end panel, following the

/2” screws to mount the

instructions on the Field Disconnect Warning label (see Fig. 21). In either case, set the disconnect vertical location on the unit so that a 90_ fitting can be used to connect the conduit to the disconnect.

C10012

C10854

Fig. 21 -- Mounting Position for Field Disconnects

(up to 100A)

Field power wires are connected to the unit at line--side pressure lugs at the main terminal block (TB1) or at factory--installed option non--fused disconnect switch. Max wire size is #2 AWG (copper only). (See Fig. 23)

NOTE: TEST LEADS -- Unit may be equipped with short leads (pigtails) on the field line connection points off the optional disconnect switch. These leads are for factory run--test purposes only; remove and discard before connecting field power wires to unit connection points. Make field power connections directly to line connection pressure lugs only.

WARNING

C10853

Fig. 20 -- Mounting Position for Field Disconnects

(over 100A)

FIRE HAZARD

Failure to follow this warning could result in intermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnect switch and air conditioning unit. Use only copper wire.(SeeFig.22.)

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

ALUMINUM

WIRE

A93033

Fig. 22 -- Disconnect Switch and Unit

Page 13

All Units —

Units with Factory--Installed Disconnect —

All field wiring must comply with the NEC and local requirements.

Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 23 and the unit label diagram for power wiring connections to the unit power terminal blocks and equipment ground. Maximum wire size is 2/0 AWG per pole.

Provide a ground--fault and short--circuit over--current protection device (fuse or breaker) per NEC Article 440 (or local codes). Refer to unit informative data plate for MOCP (Maximum Over--current Protection) device size.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. See Table 9. On 3--phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in the legend for Table 9 (see Note 2 on page 46) to determine the percent of voltage imbalance.

All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is

to be connected to a 208-v power supply, the control transformer must be rewired by moving the black wire

with the connection and moving it to the 200-v

/4-in. female spade connector from the 230--v

/4-in. male

terminal on the primary side of the transformer. Refer to

unit label diagram for additional information.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

NOTE: Check all factory and field electrical connections for tightness.

Units Without Factory--Installed Disconnect —

When installing units, provide a disconnect switch of adequate size per NEC (National Electrical Code). Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.

The factory--installed option disconnect switch is located in a weatherproof enclosure located under the main control box. The manual switch handle is accessible through an opening in the access panel. Discard the factory test leads (see Fig. 23). The factory disconnect is an 80A disconnect.

Units Without Disconnect Option

TB1

11 12 13

Disconnect

per

NEC

L2 L3

208/230-3-60

460-3-60 575-3-60

Units With Disconnect Option

Optional

Disconnect

Switch

Disconnect factory test leads; discard.

Factory

Wiring

C10015

Fig. 23 -- Power Wiring Connections

Convenience Outlets —

WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury or death.

Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Lock--out and tag--out this switch, if necessary.

Two types of convenience outlets are offered on the 50TC--D16 : non--powered and unit--powered. Both types provide a 125--volt GFCI (ground--fault circuit--interrupter) duplex receptacle rated at 15--A behind a hinged waterproof access cover, located on the panel beneath the control box. See Fig. 24.

50TC--*16

Page 14

Pwd-CO

Fuse

Switch

Pwd-CO

Transformer

50TC--*16

Convenience

Outlet

GFCI

Disconnect

Access Panel

Fig. 24 -- Convenience Outlet Location

Non--powered type: This type requires the field

installation of a general--purpose 125--volt 15--A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size and conduit requirements, fuse or breaker requirements and disconnect switch size and location. Route 125--v power supply conductors into the bottom of the utility box containing the duplex receptacle.

C10857

If the convenience outlet transformer is connected to the line side of the factory disconnect option, route the wires through the web bushing located on the bottom of the disconnect box. For the load side wiring to the factory option disconnect, route the wires through the hole on the right side of the disconnect. Be sure to create a drip loop at least 6” long.

NOTICE/AVIS

Convenience Outlet Utilization

Maximum Intermittent Use 15 - Amps

Maximum Continuous Use 8 - Amps

Observe a 50% limit on the circuit

Loading above 8 - Amps

Utilisation de la prise utilitaire

Usage intermittent maximum 15 - Amps

Usage continu maximum 8 - Amps

Observez une limite de 50% sur le circuit

Chargement au-dessus de 8 - Amps

Fig. 25 -- Convenience Outlet Utilization Notice

Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle. Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the RESET button to clear the tripped condition.

2.050HE501288

C10077

Unit--powered type: A unit--mounted transformer is factory--installed to stepdown the main power supply voltage to the unit to 115--v at the duplex receptacle. This option also includes a manual switch with fuse, located in a utility box and mounted on a bracket behind the convenience outlet; access is through the panel beneath the control box. See Fig. 24.

The primary leads to the convenience outlet transformer are not factory--connected. Selection of primary power source is a customer--option. If local codes permit, the transformer primary leads can be connected at the line--side terminals on the unit--mounted non--fused disconnect switch; this will provide service power to the unit when the unit disconnect switch is open. Other connection methods will result in the convenience outlet circuit being de--energized when the unit disconnect switch is open. See Fig. 26. On a unit without a unit--mounted disconnect, connect the source leads to the main terminal block (TB1).

If the convenience outlet transformer is connected to the line side of a field disconnect, the conduit provided with the unit must be used to protect the wire as they are routed from the transformer to the field disconnect. The end of the conduit with the straight connector attaches to the field disconnect. The other end does not need to connect to the transformer; however, the conduit must be routed so that all wiring is either in the conduit or behind the access panel.

C08283

UNIT

VOLTAGE

208, 230

460 480

575 600

CONNECT

240

PRIMARY

CONNECTIONS

L1: RED +YEL L2: BLU + GRA

L1: RED Splice BLU + YEL L2: GRA

L1: RED L2: GRA

TRANSFORMER

TERMINALS

H1 + H3 H2 + H4

H2 + H3

H1 H2

Fig. 26 -- Unit Powered Convenience Outlet Wiring

Fuse on power type: The factory fuse is a Bussman “Fusetron” T--15, non--renewable screw--in (Edison base) type plug fuse.

Page 15

WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury or death.

Using unit--mounted convenience outlets: Units with unit--mounded convenience outlet circuits will often require that two disconnects be opened to de--energize all power to the unit. Treat all units as electrically energized until the convenience outlet power is also checked and de--energization is confirmed. Observe National Electrical Code Article 210, Branch Circuits, for use of convenience outlets.

Installing Weatherproof Cover: A weatherproof while-in-use cover for the factory-installed convenience outlets is now required by UL standards. This cover cannot be factory-mounted due its depth; it must be installed at unit installation. For shipment, the convenience outlet is covered with a blank cover plate.

The weatherproof cover kit is shipped in the unit’s control box. The kit includes the hinged cover, a backing plate and gasket.

DISCONNECT ALL POWER TO UNIT AND CONVENIENCE OUTLET. LOCK--OUT AND TAG--OUT ALL POWER.

Remove the blank cover plate at the convenience outlet; discard the blank cover.

Loosen the two screws at the GFCI duplex outlet, until

approximately

/2-in (13 mm) under screw heads are exposed. Press the gasket over the screw heads. Slip the backing plate over the screw heads at the keyhole slots and align with the gasket; tighten the two screws until snug (do not over-tighten).

Mount the weatherproof cover to the backing plate as shown in Fig. 27. Remove two slot fillers in the bottom of the cover to permit service tool cords to exit the cover. Check for full closing and latching.

COVER – WHILE-IN-USE WEATHERPROOF

RECEPTACLE NOT INCLUDED

Factory--Option Thru--Base Connections —

This service connection kit consists of a1/2--in electrical

bulkhead connector and a 1

/2--in electrical bulkhead connector, connected to an “L” bracket covering the embossed (raised) section of the unit basepan in the

condenser section. See Fig. 28. The

/2--in bulkhead

connector enables the low--voltage control wires to pass

through the basepan. The 1

/2--in electrical bulkhead connector allows the high--voltage power wires to pass through the basepan.

/2” ELECTRICAL BULKHEAD CONNECTOR

11/2” ELECTRICAL BULKHEAD CONNECTOR

C10907

Fig. 28 -- Thru--the--Base Option, Shipping Position

1. Remove the “L” bracket assembly from the unit.

2. Remove connector plate assembly from the “L” bracket and discard the “L” bracket, but retain the washer head screws and the gasket (located between the “L” bracket and the connector plate assembly).

NOTE: Take care not to damage the gasket, as it is reused in the following step.

3. Place the gasket over the embossed area in the basepan, aligning the holes in the gasket to the holes in the basepan. See Fig. 29.

4. Install the connector plate assembly to the basepan using 8 of the washer head screws.

NOTE: If electrical connections are not going to occur at this time, tape or otherwise cover the fittings so that moisture does not get into the building or conduit in the interim.

CONNECTOR PLATE ASSEMBLY

50TC--*16

BASE PLATE FOR GFCI RECEPTACLE

Fig. 27 -- Weatherproof Cover Installation

GASKET

C10908

Fig. 29 -- Installing Thru--the--Base Option

C09022

Check tightness of connector lock nuts before connecting electrical conduits.

Page 16

Field--supplied and field--installed liquidtight conduit connectors and conduit may be attached to the connectors on the basepan. Pull correctly rated high voltage and low voltage wires through appropriate conduits. Connect the power conduit to the internal disconnect (if unit is so equipped) or to the external disconnect (through unit side panel). Remove one of the two knockouts located on the bottom left side of the unit control box. Use this hole for the control conduit.

Units without Thru--Base Connections —

1. Install power wiring conduit through side panel openings. Install conduit between disconnect and control box.

2. Install power lines to terminal connections as shown in Fig. 23.

Field Control Wiring —

Typical

Thermostat

Connections

O/B/Y2

(Note 1)

(Note 2)

Terminal

Central

Board

T H E R M O S T A T

The 50TC--16D requires an external temperature control device. This device can be a thermostat (field--supplied)

50TC--*16

or a PremierLink controller (available as factory--installed option or as field--installed accessory, for use on a Carrier Comfort Network or as a stand alone control) or the RTU Open Controller for Building Management Systems using non--CCN protocols (RTU Open is available as a factory--installed option only).

Thermostat —

Select a Carrier--approved accessory thermostat. When electric heat is installed in the 50HC unit, the thermostat must be capable of energizing the G terminal (to energize the Indoor Fan Contactor) whenever there is a space call for heat (energizing the W1 terminal). The accessory thermostats listed on the unit price pages can provide this signal but they are not configured to enable this signal as shipped.

Install the accessory thermostat according to installation instructions included with the accessory.

Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions.

Note 1: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2. Do not configure for O output.

Note 2: W connection(s) not required on units without electric heating.

Field Wiring

C10909

Fig. 30 -- Typical Low--Voltage Control Connections

Unit without Thru--Base Connection Kit —

Pass the thermostat control wires through the bushing on the unit end panel. Route the wire through the snap--in wire tie and up to the web bushing near the control box. Route the wire through the bushing and into the bottom left side of the control box after removing one of the two knockouts in the corner of the box. Use a connector at the control box to protect the wire as it passes into the control box. Pull the wires over to the terminal strip at the upper left corner of the Central Terminal Board (CTB). Use the connector at the control box and the wire tie to take up any slack in the thermostat wire to ensure that it will not be damaged by contact with the condenser coil. See Fig. 31.

If the thermostat contains a logic circuit requiring 24--v power, use a thermostat cable or equivalent single leads of different colors with minimum of seven leads. If the thermostat does not require a 24--v source (no “C” connection required), use a thermostat cable or equivalent with minimum of six leads. Check the thermostat installation instructions for additional features which might require additional conductors in the cable.

For wire runs up to 50 ft. (15 m), use no. 18 AWG (American Wire Gage) insulated wire (35_C minimum). For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated wire (35_C minimum). For over 75 ft. (23 m), use no. 14 AWG insulated wire (35_C minimum). All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

C10018

Fig. 31 -- Thermostat Wire Routing

NOTE: If thru--the--bottom connections accessory is

used, refer to the accessory installation instructions for information on routing power and control wiring.

Page 17

DISCONNECT MOUNTING LOCATION

SINGLE POINT BOX

HEATER COVERS

MANUAL RESET LIMIT SWITCH

SINGLE POINT BOX MOUNTING SCREW

Fig. 32 -- Typical Component Location

Heat Anticipator Settings —

Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second--stage heating, when available.

Electric Heaters

50TC--D16 units may be equipped with field--installed accessory electric heaters. The heaters are modular in design. One or two heater modules may be used in a unit.

Heater modules are installed in the compartment below the indoor (supply) fan outlet. Access is through the indoor access panel. Heater modules slide into the compartment on tracks along the bottom of the heater opening. See Fig. 32.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

Not all available heater modules and single point boxes may be used in every unit. Use only those heater modules that are UL listed for use in a specific size unit. Refer to the label on the unit cabinet for the list of approved heaters and single point boxes.

Single Point Boxes

When heaters are installed, power wiring to both heaters and the rest of the unit is connected via the single point box accessory, which will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the outdoor section. The single point box has a hinged access cover. See Fig. 33. The single point box also includes tap conductors to complete the wiring between the single point box and the unit’s main control box terminals. Refer

HEATER MODULE (LOCATION 1)

HEATER MODULE (LOCATION 2)

HEATER MOUNTING BRACKET

C10029

to the accessory heater and Single Point Box installation instructions for details on tap connections.

CONTROL BOX

BUSHING

SINGLE POINT BOX MOUNTING SCREWS

DRIP BOOT BRACKET MOUNTING SCREWS

POWER WIRES

FOAM BUSHING

HEATER RELAYS

HEATER MOUNTING SCREWS

A L

LIE

C O R

P .

M O

ERI

N O.

2 2

. 2

ISTED

AIR

NDITIONING

UIP

ACCESS

346N

P / N

6 10-

REV

C08136

Fig. 33 -- Typical Single Point Installation

Heater and Supplementary Fuses —

When the unit MOCP device value exceeds 60--A, unit--mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory Single Point Boxes, with power distribution and fuse blocks.

All fuses on 50TC--*16 units are 60--A. (Note that all heaters are qualified for use with a 60--A fuse, regardless of actual heater ampacity, so only 60--A fuses are necessary.)

50TC--*16

Page 18

Heater Low--Voltage Control Connections —

One or two heaters can be installed in the unit. Use the wiring procedure listed below for each heater as determined by the number of stages in the heater.

Single Stage Heaters: Single--stage heaters will have an orange and a brown control wire. Connect these to the orange and brown wires located on TB4.

LCTB

CONTL BOARD

Two Stage Heaters: Two--stage heaters will have orange, purple, red and brown wires. The orange and the purple are the control wires and the red and brown wires feed the safety circuit. Connect both the orange and the purple wires to the orange wire locations of TB4. Connect the red and brown wires to red and brown wires on TB4. If more than one heater is installed, repeat the wiring procedure for the second heater. The 3 locations across the top of TB4 do allow a switch to be installed in series with some of the heaters in order to add additional heater control.

50TC--*16

Field Connections

VIO

ORN

BRN

TB4

BRN

ORN

VIO

Elec Htr

VIO

HR2

BRN

VIO

HR1

HR1: On Heater 1 in Position #1 HR2: On Heater 2 in Position #2 (if installed)

Fig. 34 -- Accessory Electric Heater Control Connections

BRN

C08331

Page 19

Humidi--MiZerRControl Connections

Humidi--MiZer – Space RH Controller — NOTE: The Humidi--MiZer is a factory installed option.

The Humidi--MiZer dehumidification system requires a field--supplied and --installed space relative humidity control device. This device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combination thermostat--humidistat control device such as Carrier’s EDGE isolated contact set for dehumidification control. The humidistat is normally used in applications where a temperature control is already provided (units with PremierLinkt control).

To connect the Carrier humidistat (HL38MG029):

1. Route the humidistat 2--conductor cable (field--supplied) through the bushing the unit’s louvered end panel (see Fig. 31).

2. Route the cable through the snap--in wire tie and up to the web bushing near the control box.

3. Feed the cable through the bushing and into the bottom left side of the control box after removing one of the two knockouts in the corner of the box. Use a connector to protect the cable as it enters the control box.

4. Use the connector and the wire tie to reduce any slack in the humidistat cable to ensure that it will not be damaged by contact with the condenser coil (see Fig.

31).

5. Use wire nuts to connect humidistat cable to two PINK leads in the low–voltage wiring as shown in Fig. 37.

To connect the Thermidistat device (33CS2PPRH--01):

1. Route the Thermidistat multi--conductor thermostat cable (field--supplied) through the bushing the unit’s louvered end panel (see Fig. 31).

2. Route the cable through the snap--in wire tie and up to the web bushing near the control box.

4. Use the connector and the wire tie to reduce any slack in the thermostat cable to ensure that it will not be damaged by contact with the condenser coil (see Fig. 31).

5. The Thermidistat has dry contacts at terminals D1 and D2 for dehumidification operation (see Fig. 38). The dry contacts must be wired between CTB terminal R and the PINK lead to the LTLO switch with field--supplied wire nuts. Refer to the installation instructions included with the Carrier Edge Thermidistat device (Form 33CS--65SI or latest) for more information.

Pro Thermidistat with

% RELATIVE HUMIDITY

C09295

Fig. 35 -- Accessory Field--Installed Humidistat

50TC--*16

C09296

Fig. 36 -- EDGE Pro Thermidistat

Page 20

50TC--*16

HUMIDISTAT

Fig. 37 -- Typical Humidi--MiZerRAdaptive Dehumidification System Humidistat Wiring

EDGE Pro THERMIDISTAT

Rc Rh

O/W2/B

OAT RRS

SRTN

HUM

D1 D2 V+ Vg

Humidi-MiZer™ FIOP

Unit CTB

THERMOSTAT

C11208

*Connection not required.

Fig. 38 -- Typical Rooftop Unit with Humidi--MiZer Adaptive Dehumidification System

with EDGE Pro Thermidistat Device

C09298

Page 21

PremierLinkt (Factory Option)

50TC--*16

C08199

Fig. 39 -- PremierLink Controller

NOTE: Refer to Form 33CS--67SI for complete

PremierLink configuration, operating sequences and troubleshooting information. Have a copy of this manual available at unit start--up.

The PremierLink controller (see Fig. 39) is compatible with Carrier Comfort Networkr (CCN) devices. This control is designed to allow users the access and ability to change factory--defined settings, thus expanding the function of the standard unit control board. CCN service access tools include System Pilot (TM), Touch Pilot (TM) and Service Tool. (Standard tier display tools Navigatort and Scrolling Marquee are not suitable for use with latest PremierLink controller (Version 2.x).)

The PremierLink control is factory--mounted in the 50TC--D16 unit’s main control box to the left of the Central Terminal Board (CTB). Factory wiring is completed through harnesses connected to the CTB. Field

connections are made at a 16--pole terminal block (TB3) located on the bottom shelf of the unit control box in front of the PremierLink controller. The factory--installed PremierLink control includes the supply--air temperature (SAT) sensor. The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$ert2 package. (See page 40 for accessory enthalpy controls.)

The PremierLink controller requires the use of a Carrier electronic thermostat or a CCN connection for time broadcast to initiate its internal timeclock. This is necessary for broadcast of time of day functions (occupied/unoccupied).

NOTE: PremierLink controller is shipped in Sensor mode. To be used with a thermostat, the PremierLink controller must be configured to Thermostat mode. Refer to PremierLink Configuration instructions for Operating Mode.

Fig. 40 -- 50HC**14 Control Box Component Locations -- PremierLink Controller Location

C11191

Page 22

50TC--*16

Fig. 41 -- PremierLink Wiring Schematic

C11209

Page 23

50TC--*16

Fig. 42 -- PremierLink Wiring Schematic with Humidi--MiZer

C11210

Page 24

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 50TC--D16 units, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 6--inches (152 mm) in length. It is a nominal 10--k ohm thermistor.

NOTE: The sensor must be mounted in the discharge airstream downstream of the cooling coil and any heating devices. Be sure the probe tip does not come in contact with any of the unit’s heater surfaces.

Outdoor Air Temperature (OAT) Sensor —

The SAT is factory--wired. The SAT probe is wire--tied to the supply--air opening (on the horizontal opening end) in its shipping position. Remove the sensor for installation. Re--position the sensor in the flange of the supply--air opening or in the supply air duct (as required by local

codes). Drill or punch a

/2--in. hole in the flange or duct. Use the template provided in the unit control box. Use two field--supplied, self--drilling screws to secure the sensor probe in a horizontal orientation. See Fig. 43.

50TC--*16

SUPPLY AIR TEMPERATURE SENSOR

SUPPLY AIR

RETURN AIR

Fig. 43 -- Typical Mounting Location for Supply Air

Temperature (SAT) Sensor on Small Rooftop Units

ROOF CURB

C10020

The OAT is factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring.

EconoMi$er2 —

The PremierLink control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the PremierLink control; EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with field--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors) Space CO Outdoor air CO

sensor

Refer to Table 2 for accessory part numbers.

Field Connections

Field connections for accessory sensor and input devices are made at the 16--pole terminal block (TB3) located beneath the PremierLink control (See Figs. 41 and 42). Some input devices also require a 24--vac signal source; connect at CTB terminal R at “THERMOSTAT” connection strip for this signal source. See connections figures on following pages for field connection locations (and for continued connections at the PremierLink board inputs). Route wires to control box as indicated in Fig. 31.

NOTE: Refer to Form 33CS--67SI (or latest) for complete PremierLink configuration, operating sequences and troubleshooting information. Have a copy of this

Table 3 provides a summary of field connections for units equipped with Space Sensor. Table 4 provides a summary of field connections for units equipped with Space Thermostat.

manual available at unit set--up.

Table 2 – PremierLink Sensor Usage

OUTDOOR A I R

APPLICATION

Differential Dry Bulb

Temperatur e w i t h

PremierLink

(PremierLink requires

4 --- 2 0 m A A c tu a t o r)

Single Enthalpy with

PremierLink

(PremierLink requires

4 --- 2 0 m A A c tu a t or)

Differential Enthalpy

with PremierLink

(PremierLink requires

4 --- 2 0 m A A c tu a t or)

NOTES: CO

Sensors (Optional):

33ZCSENCO2 --- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor. 33ZCASPCO2 --- Aspirator box used for duct---mounted CO 33ZCT55CO2 --- Space temperature and CO 33ZCT56CO2 --- Space temperature and CO

TEMPERATURE

SENSOR

I n clu d ed ---

CRTEMPSN001A00

I n clu d ed ---

Not Used

I n clu d ed ---

Not Used

room sensor with override.

room sensor with override and setpoint.

RETURN AIR

TEMPERATURE

SENSOR

R e qu i r ed ---

33ZCT55SPT

or equivalent

---

room sensor.

OUTDOOR A I R

ENTHALPY SENSOR

--- ---

R e qu i r es ---

33CSENTHSW

R e qu i r es ---

33CSENTHSW

or equivalent

RETURN AIR

ENTHALPY SENSOR

---

R e qu i r es ---

33CSENTSEN

or equivalent

Page 25

Table 3 – Space Sensor Mode

TB3 TERMINAL FIELD CONNECTION INPUT SIGNAL

1 T5 5 --- S EN / T 56 --- S E N Analog (10k thermistor)

2 RMTOCC Discrete, 24VAC

3 T5 5 --- S EN / T 56 --- S E N Analog (10k thermistor)

4 CMPSAFE Discrete, 24VAC

5 T56--- SET Analog (10k thermistor)

6 FSD Discrete, 24VAC

7 LOOP---PWR Analog, 24VDC

8 SPS Discrete, 24VAC

9 IAQ ---SEN A na l o g, 4 --- 2 0 mA

10 FILTER Discrete, 24VAC

11 I A Q --- C O M / O A Q --- C O M/ R H --- CO M A n al o g , 4 --- 20 m A

12 CCN + (RED) Digital,,5VDC

13 OAQ ---SEN/RH---SEN A n al o g , 4 --- 20 m A

14 CCN Gnd (WHT) Digital, 5VDC

15 AUX OUT(Power Exhaust) (Output)Discrete 24VAC

16 CCN --- (BLK) Digital, 5VDC

LEGEND:

T 5 5 --- S p a ce Te m p e r a tu r e S e ns o r F S D --- F i re S h u td o w n T 5 6 --- S p a ce Te m p e r a tu r e S e ns o r I A Q --- I n do o r A i r Qu a l ity ( C O CCN --- Carrier Comfort Network (communication bus) OAQ --- Outdoor Air Quality (CO C M P SA F E --- C om p r e ss o r S a fe t y R H --- R e l a t iv e H u m id i t y F I L T E R --- D i rt y F i l te r S w i t ch S F S --- S u p p ly Fa n S t a t u s

50TC--*16

)

Table 4 – Thermostat Mode

TB3 TERMINAL FIELD CONNECTION INPUT SIGNAL

1 RAT SEN Analog (10k thermistor)

2 G Discrete, 24VAC

3 RAT SEN Analog (10k thermistor)

4 Y1 Discrete, 24VAC

6 Y2 Discrete, 24VAC

7 LOOP---PWR Analog, 24VDC

8 W1 Discrete, 24VAC

9 I A Q --- S E N Analog, 4 - -- 20mA

10 W2 Discrete, 24VAC

11 I A Q --- C O M / O A Q --- C O M/ R H --- CO M Analog, 4---20mA

12 CCN + (RED) Digital, 5VDC

13 O AQ --- S E N / R H --- S E N Analog, 4--- 20mA

14 CCN Gnd (WHT) Digital, 5VDC

15 AUX OUT (Power Exhaust) (Output) Discrete 24VAC

16 CCN --- (BLK) Digital, 5VDC

LEGEND:

CCN --- Carrier Comfort Network (communication bus) RH --- Relative Humidity G --- Thermostat Fan W1 --- Thermostat Heat Stage 1 IAQ --- Indoor Air Quality (CO OAQ --- Outdoor Air Quality (CO RAT --- Return Air Temperature Y2 --- Thermostat Cool Stage 2

) W2 --- Thermostat Heat Stage 2

) Y1 --- Thermostat Cool Stage 1

Page 26

Space Sensors —

The PremierLink controller is factory--shipped configured for Space Sensor Mode. A Carrier T--55 or T--56 space sensor must be used. T--55 space temperature sensor provides a signal of space temperature to the PremierLink control. T--56 provides same space temperature signal plus it allows for adjustment of space temperature setpoints from the face of the sensor by the occupants.

SW1

SEN

RED(+)

WHT(GND)

BLK(-)

BRN (GND)

BLU (SPT)

CCN COM

SENSOR WIRING

TB3 PL

SEN J6-7

SEN

Jumper

TB3

J6-6

SET

J6-5

C10022

Fig. 47 -- PremierLink T--56 Sensor

Connect Thermostat —

A 7--wire thermostat connection requires a 24--v power source and a common connection. Use the R and C terminals on the CTB’s THERMOSTAT connection strip for these. Connect the thermostat’s Y1, Y2, W1, W2 and G terminals to PremierLink TB3 as shown in Fig. 48.

50TC--*16

Fig. 44 -- T--55 Space Temperature Sensor Wiring

Connect T--55: See Fig. 44 for typical T--55 internal

connections. Connect the T--55 SEN terminals to TB3 terminals 1 and 3 (see Fig. 45).

TB3 PL

SEN J6-7

SEN

Fig. 45 -- PremierLink T--55 Sensor

Connect T--56: See Fig. 46 for T--56 internal connections.

Install a jumper between SEN and SET terminals as illustrated. Connect T--56 terminals to TB3 terminals 1, 3 and 5 (see Fig. 47).

SW1

SEN

RED(+)

WHT(GND)

BLK(-)

SET

BRN (GND) BLU (SPT)

BLK (T56)

CCN COM

SENSOR WIRING

JUMPER TERMINALS AS SHOWN

J6-6

C08201

C10023

If the 50TC--D16 unit is equipped with factory--installed smoke detector(s), disconnect the factory BLU lead at TB3--6 (Y2) before connecting the thermostat. Identify the BLU lead originating at CTB--DDC--1; disconnect at TB3--6 and tape off. Confirm that the second BLU lead at TB3--6 remains connected to PremierLink J4--8.

SPACE

THERMOSTAT

GJ4-12

CTB

THERMOSTAT

TB3

THERMOSTAT

J4-10

J4-8

J4-6

J4-4

CTB

C10283

Fig. 48 -- Space Thermostat Connections

If the 50TC--D16 unit has an economizer system and free--cooling operation is required, a sensor representing Return Air Temperature must also be connected (field--supplied and installed). This sensor may be a T--55 Space Sensor (see Fig. 44) installed in the space or in the return duct, or it may be sensor PNO 33ZCSENSAT, installed in the return duct. Connect this sensor to TB3--1 and TB3--3 per Fig. 45.

Configure the unit for Thermostat Mode —

Connect to the CCN bus using a CCN service tool and navigate to PremierLink Configuration screen for Operating Mode. Default setting is Sensor Mode (value 1). Change the value to 0 to reconfigure the controller for Thermostat Mode.

Cool Warm

Fig. 46 -- T--56 Internal Connections

C08202

When the PremierLink is configured for Thermostat Mode, these functions are not available: Fire Shutdown (FSD), Remote Occupied (RMTOCC), Compressor Safety (CMPSAFE), Supply Fan Status (SFS), and Filter Pressure Switch (FILTER).

Page 27

Economizer Controls

Indoor Air Quality (CO2sensor) —

The indoor air quality sensor accessory monitors space carbon dioxide (CO monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO

The CO

sensors are all factory set for a range of 0 to

2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO requirements and terminal locations. See Fig. 49 for typical CO

sensor wiring schematic.

To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return--air grille (if present) so it senses the concentration of CO leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. Allow at least 3 ft (0.9 m) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream.

) levels. This information is used to

present in the space air.

sensor for electrical

To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 49. Connect the 4--20 mA terminal to terminal TB3--9 and connect the SIG COM terminal to terminal TB3--11. See Fig. 50.

IAQ Sensor

SEN J5-5

COM

24 VAC

TB3

Fig. 50 -- Indoor CO2Sensor (33ZCSENCO2)

Connections

Refer to Form 33CS--67SI, PremierLink Installation, Start--up, and Configuration Instructions, for detailed configuration information

Outdoor Air Quality Sensor

(PNO 33ZCSENCO2 plus weatherproof enclosure) —

The outdoor air CO dioxide (CO

) levels in the outside ventilation air and

sensor is designed to monitor carbon

interface with the ventilation damper in an HVAC system. The OAQ sensor is packaged with an outdoor cover. See Fig. 51. The outdoor air CO

sensor must be located in the

economizer outside air hood.

J5-3

C10284

50TC--*16

0-10VDC

SIG COM

4-20mA

ALARM

NC COM

RELAY

}

CONTACTS

24 VAC

24 VDC

J3 J4

C08635

Fig. 49 -- Indoor/Outdoor Air Quality (CO2)Sensor

(33ZCSENCO2) -- Typical Wiring Diagram

Wiring the Indoor Air Quality Sensor: For each sensor,

use two 2--conductor 18 AWG (American Wire Gage) 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.

COVER REMOVED SIDE VIEW

C07135

Fig. 51 -- Outdoor Air Quality Sensor Cover

Wiring the Outdoor Air CO

Sensor: A dedicated

power supply is required for this sensor. A two--wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2.

To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the OAQ sensor. See Fig. 49. Connect the 4 to 20 mA terminal to the TB3--13 terminal of the 50TC--D16. Connect the SIG COM terminal to the TB3--11 terminal of the 50TC--D16. See Fig. 52.

Page 28

IAQ Sensor

SEN J5-2

COM

24 VAC

TB3

Fig. 52 -- Outdoor CO2Sensor Connections

Space Relative Humidity Sensor or Humidistat Connections —

Space Relative Humidity Sensor connections: The

accessory space relative humidity sensor (33ZCSENSRH-01) is installed on an interior wall to measure the relative humidity of the air within the occupied space.

The use of a standard 2 X 4 inch electrical box to accommodate the wiring is recommended for installation. The sensor can be mounted directly on the wall, if acceptable by local codes.

50TC--*16

CAUTION

J5-3

C10285

MOUNTING HOLES

Gnd

Vin

SW2

123456

WIRING OPENING

C11084

Fig. 53 -- Space Relative Humidity Sensor Installation

TB3-7

UNIT DAMAGE HAZARD

Failure to follow this caution may result in permanent damage to the sensor.

DO NOT clean or touch the sensing element with chemical solvents as they can permanently damage the sensor.

CAUTION

UNIT PERFORMANCE HAZARD

Failure to follow this caution will result in inaccurate sensor readings.

DO NOT mount the sensor in drafty areas such as near heating or air--conditioning ducts, open windows, fans, or over heat sources such as baseboard heaters, radiators, or wall--mounted dimmers. Sensors mounted in those areas will produce inaccurate readings.

If the sensor is installed directly on a wall service, install the humidity sensor using 2 screws and 2 hollow wall anchors (field supplied). Do not over tighten screws. See Fig. 53.

The sensor must be mounted vertically on the wall. The Carrier logo should be orientated correctly when the sensor is properly mounted.

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. The sensor should be vertically mounted approximately 5 ft up from the floor, beside the space temperature sensor.

For wiring distances up to 500 feet, use a 3--conductor, 18 or 20 AWG cable. ACCN communication cable can be used, although the shield is not required. The shield must be removed from the sensor end of the cable if this cable is used. See Fig. 54 for wiring details.

TB3-13

RED

BLACK

Io VoVin Gnd

C11085

Fig. 54 -- Space Relative Humidity Sensor Connection

The power for the sensor is provided by the PremierLink control on terminal J5--4 (+33 to +35vdc).

To wire the sensor:

1. At the sensor, remove 4 inches of the jacket from the cable. Strip or. Route the cable through the wire clearance opening in the center of the sensor. See Fig. 53.

2. Connect a field--supplied BLACK wire to the sensor screw terminal marked Vin.

3. Connect a field--supplied RED wire into the sensor screw terminal marked Io.

4. Connect the field--supplied RED wire from the sensor to TB3--13.

5. Connect the field--supplied BLACK wire from the sensor to TB3--7.

Humidistat connections: A humidistat can not be directly connected to the PremierLink controller. Follow the instructions on pages 19 & 20 to connect a humidistat or a thermostat as an electromechanical device.

/4inch of insulation from each conduct-

Page 29

Smoke Detector/Fire Shutdown (FSD) —

This function is available only when PremierLink is configured for (Space) Sensor Mode. The unit is factory--wired for PremierLink FSD operation when PremierLink is factory--installed.

On 50TC--D16 units equipped with factory--installed Smoke Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The PremierLink communicates the smoke detector’s tripped status to the CCN building control. See See Figs. 41 and 42, the PremierLink wiring schematics.

Filter Status Switch —

Connect one side of the switch’s NO contact set to CTB’s THERMOSTAT--R terminal. Connect the other side of the NO contact set to TB3--8. Setpoint for Supply Fan Status is set at the switch. See Fig. 56.

Fan (Pressure) Switch (NO, close on rise in pressure)

CTB

Thermostat

TB3

J4-6

C10287

Fig. 56 -- PremierLink Wiring Fan Pressure Switch

Connection

This function is available only when PremierLink is configured for (Space) Sensor Mode.

PremierLink control can monitor return filter status in two ways: By monitoring a field--supplied/installed filter pressure switch or via supply fan runtime hours.

Using switch input: Install the dirty filter pressure switch according to switch manufacturer’s instructions, to measure pressure drop across the unit’s return filters. Connect one side of the switch’s NO contact set to CTB’s THERMOSTAT--R terminal. Connect the other side of the NO contact set to TB3--10. Setpoint for Dirty Filter is set at the switch. See Fig. 55.

Filter Switch (NO, close on rising pressure (high drop))

CTB

Thermostat

TB3

J4-4

C10286

Fig. 55 -- PremierLink Filter Switch Connection

When the filter switch’s NO contact set closes as filter pressure drop increases (indicating dirt--laden filters), the input signal to PremierLink causes the filter status point to read “DIRTY”.

Using Filter Timer Hours: Refer to Form 33CS--67SI for instructions on using the PremierLink Configuration screens and on unit alarm sequence.

Supply Fan Status Switch —

The PremierLink control can monitor supply fan operation through a field--supplied/installed differential pressure switch. This sequence will prevent (or interrupt) operation of unit cooling, heating and economizer functions until the pressure switch contacts are closed indicating proper supply fan operation.

Remote Occupied Switch —

The PremierLink control permits a remote timeclock to override the control’s on--board occupancy schedule and place the unit into Occupied mode. This function may also provide a “Door Switch” time delay function that will terminate cooling and heating functions after a 2--20 minute delay.

Connect one side of the NO contact set on the timeclock to CTB’s THERMOSTAT--R terminal. Connect the other side of the timeclock contact to the unit’s TB3--2 terminal.

Remote Occupied

Time Clock

LCTB

Thermostat

TB3

J4-12

C10288

Fig. 57 -- PremierLink Wiring Remote Occupied

Refer to Form 33CS--67SI for additional information on configuring the PremierLink control for Door Switch timer function.

Power Exhaust (output) —

Connect the accessory Power Exhaust contactor coils(s) per Fig. 58.

Power Exhaust

PEC

GRA

TAN

TB3

CTB

THERMOSTAT

J8-3

C10289

Fig. 58 -- PremierLink Power Exhaust Output

Connection

50TC--*16

Install the differential pressure switch in the supply fan section according to switch manufacturer’s instructions. Arrange the switch contact to be open on no flow and to close as pressure rises indicating fan operation.

Page 30

CCN Communication Bus —

The PremierLink controller connects to the bus in a daisy chain arrangement. Negative pins on each component must be connected to respective negative pins, and likewise, positive pins on each component must be connected to respective positive pins. The controller signal pins must be wired to the signal ground pins. Wiring connections for CCN must be made at the 3--pin plug.

At any baud (9600, 19200, 38400 baud), the number of controllers is limited to 239 devices maximum. Bus length may not exceed 4000 ft, with no more than 60 total devices on any 1000--ft section. Optically isolated RS--485 repeaters are required every 1000 ft.

NOTE: Carrier device default is 9600 band. Communications Bus Wire Specifications -- The CCN

Communication Bus wiring is field--supplied and field--installed. It consists of shielded 3--conductor cable with drain (ground) wire. The cable selected must be

50TC--*16

identical to the CCN Communication Bus wire used for the entire network.

The communication bus shields must be tied together at each system element. If the communication bus is entirely within one building, the resulting continuous shield must be connected to ground at only one single point. If the communication bus cable exits from one building and enters another building, the shields must be connected to the grounds at a lightning suppressor in each building (one point only).

Connecting CCN Bus: NOTE: When connecting the communication bus cable,

a color code system for the entire network is recommended to simplify installation and checkout. See Table 6 for the recommended color code.

Table 6 – Color Code Recommendations

SIGNAL TYPE

+ Red 1

Ground White 2

--- Black 3

CCN BUS WIRE

COLOR

CCN PLUG PIN

NUMBER

See Table 5 for recommended cable.

Table 5 – Recommended Cables

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

NOTE: Conductors and drain wire must be at least 20 AWG, stranded, and 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_Cto 60_C is required. Do not run communication wire in the same conduit as or next to any AC voltage wiring.

Connect the CCN (+) lead (typically RED) to the unit’s TB3--12 terminal. Connect the CCN (ground) lead (typically WHT) to the unit’s TB3--14 terminal. Connect the CCN (--) lead (typically BLK) to the unit’s TB3--16 terminal. See Fig. 59.

CCN Bus

J2-1

J2-2GND (WHT)

J2-3– (BLK) 16

C10290

+ (RED)

TB3

Fig. 59 -- PremierLink CCN Bus Connections

Page 31

RTU Open Control System

The RTU Open control is factory--mounted in the 50TC--D16 unit’s main control box, to the left of the CTB. See Fig. 61. Factory wiring is completed through harnesses connected to the CTB. Field connections for RTU Open sensors will be made at the Phoenix connectors on the RTU Open board. The factory--installed RTU Open control includes the supply--air temperature (SAT) sensor. The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$er2 package.

The RTU Open controller is an integrated component of the Carrier rooftop unit. Its internal application programming provides optimum performance and energy efficiency. RTU Open enables the unit to run in 100% stand--alone control mode, Carrier’s I--Vu Open network, or a Third Party Building Automation System (BAS). On--board DIP switches allow you to select your protocol (and baud rate) of choice among the four most popular protocols in use today: BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 60.)

Refer to Table 7, RTU Open Controller Inputs and Outputs for locations of all connections to the RTU Open board.

50TC--*16

Fig. 60 -- RTU--Open Multi--Protocol Control Board

Fig. 61 -- 50TC--D16 Control Box Component Locations

C10811

C11194

Page 32

50TC--*16

Fig. 62 -- RTU Open System Control Wiring Diagram

C11211

Page 33

50TC--*16

Fig. 63 -- RTU--Open System Control Wiring Diagram with Humidi--MiZer

C11212

Page 34

Table 7 – RTU Open Controller Inputs and Outputs

POINT NAME

Space Temp / Zone Temp zone_temp AI (10K Thermistor) J 2 0 --- 1 , 2 Supply Air Temperature sa_temp AI (10K Thermistor) J 2 --- 1 , 2 Outdoor Air Temperature oa_temp AI (10K Thermistor) J 2 --- 3 , 4 Space Temperature Offset Pot stpt_adj_offset AI (100K Potentiometer) J 2 0 --- 3 Safety Chain Feedback safety_status DI (24 VAC) J 1 --- 9 Compressor Safety Status comp_status DI (24 VAC) J 1 --- 2 Fire Shutdown Status firedown_status DI (24 VAC) J 1 --- 1 0 Enthalpy Status enthalpy_status DI (24 VAC) J 2 --- 6 Humidistat Input Status humstat_status DI (24 VAC) J 5 --- 7

Indoor Air CO2 iaq A I ( 4 --- 2 0 m a )

Space Relative Humidity space_rh A I (4 --- 2 0 m a) Supply Fan Status* sfan_status DI (24 VAC) Filter Status* filter_status DI (24 VAC) Door Contact Input* door_contact_status DI (24 VAC)

50TC--*16

Occupancy Contact* occ_contact_status DI (24 VAC)

Economizer Output econ_output A O ( 4 --- 2 0m a ) J2 --- 5 SupplyFanRelayState sfan DO Relay (24VAC , 1A) J 1 --- 4 Compressor 1 Relay State comp_1 DO Relay (24VAC , 1A) J1 --- 8 Compressor 2 Relay State comp_2 DO Relay (24VAC , 1A) J1 --- 7 Heat Stage 1 Relay State heat_1 DO Relay (24VAC , 1A) J 1 --- 6 Heat Stage 2 Relay State heat_2 DO Relay (24VAC , 1A) J 1 --- 5 Power Exhaust Relay State pexh DO Relay (24VAC , 1A) J 1 1 --- 3 Dehumidification Relay State dehum DO Relay (24VAC, 1A) J 1 1 --- 7 , 8

LEGEND AI --- A n a l o g In p u t AO --- A n a l o g Ou tput DI --- D i s crete I n p u t DO --- Discrete Output

* These inputs (if installed) take the place of the default input on the specific channel according to schematic.

Paral l e l pi n s J5 --- 1 = J2 --- 6, J 5 --- 3 = J1 --- 1 0 , J 5 --- 5 = J 1 --- 2 ar e u s e d f or f i e l d --- in stall a tion.

BACnet OBJECT

NAME

DEDICATED INPUTS

CONFIGURABLE INPUTS

TYPE OF I/O

OUTPUTS

CONNECTION PIN

NUMBER(S)

J 4 --- 2 o r J 4 --- 5Outdoor Air CO2 oaq AI (4 --- 20 ma )

J 5 --- 1 o r J 5 --- 3 o r

J55orJ5---7

The RTU Open controller requires the use of a Carrier space sensor. A standard thermostat cannot be used with the RTU Open system.

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 50TC--D16 unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT). This sensor is a tubular probe type, approx 6--inches (12.7 mm) in length. It is a nominal 10--k ohm thermistor.

codes). Drill or punch a

/2--in. hole in the flange or duct. Use two field--supplied, self--drilling screws to secure the sensor probe in a horizontal orientation. See Fig. 43.

Outdoor Air Temperature (OAT) Sensor —

The OAT is factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring.

EconoMi$er2 —

The RTU Open control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU Open control; EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with field--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors) Space CO Outdoor air CO

sensor

Field Connections

Field connections for accessory sensors and input devices are made the RTU Open, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU Open must be routed as shown in Fig. 31. This routing provides the UL required clearance between high--and low--voltage wiring. Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board.

Page 35

Space Temperature (SPT) Sensors —

There are two types of SPT sensors available from Carrier, resistive input non-communicating (T55, T56, and T59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sensors. Each type has a variety of options consisting of: timed override button, set point adjustment, a LCD screen, and communication tie in. Space temperature can be also be written to from a building network or zoning system. However, it is still recommended that return air duct sensor be installed to allow stand-alone operation for back-up. Refer to the configuration section for details on controller configurations associated with space sensors.

Field connections to T--55, T--56 and T--59 are provided as examples.

S 33ZCT55SPT, space temperature sensor with override

button (T--55)

S 33ZCT56SPT, space temperature sensor with override

button and setpoint adjustment (T--56)

S 33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, override button, and setpoint adjustment (T--59)

Connect T--59: The T--59 space sensor requires a separate, isolated power supply of 24 VAC. See Fig. 66 for internal connections at the T--59. Connect the SEN terminal (BLU) to RTU Open J20--1. Connect the COM terminal (BRN) to J20--2. Connect the SET terminal (STO or BLK) to J20--3.

BLK (STO)

BRN (COM)

BLU (SPT)

OR SET SEN

OPB COM- PWR+

24 VAC

J20-3

J20-2

J20-1

SENSOR WIRING

POWER WIRING

50TC--*16

Use 20 gauge wire to connect the sensor to the controller. The wire is suitable for distances of up to 500 ft. Use a three--conductor shielded cable for the sensor and setpoint adjustment connections. If the setpoint adjustment (slidebar) is not required, then an unshielded, 18 or 20 gauge, two--conductor, twisted pair cable may be used.

Connect T--55: See Fig. 44 for typical T--55 internal connections. Connect the T--55 SEN terminals to RTU Open J20--1 and J20--2. See Fig. 64.

SEN

J20-1

J20-2

C08460

Fig. 64 -- RTU Open T--55 Sensor Connections

Connect T--56: See Fig. 46 for T--56 internal connections.

Install a jumper between SEN and SET terminals as illustrated. Connect T--56 terminals to RTU Open J20--1, J20--2 and J20--3 per Fig. 65.

SEN J20-1

NOTE: Must use a separate isolated transformer.

C10291

Fig. 66 -- Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

Indoor Air Quality (CO

sensor) —

The indoor air quality sensor accessory monitors space carbon dioxide (CO

) levels. This information is used to

monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO

The CO

sensors are all factory set for a range of 0 to

present in the space air.

2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO

sensor for electrical

requirements and terminal locations. See Fig. 49 for typical CO

sensor wiring schematic.

SEN

Jumper

SET

J20-2

J20-3

Fig. 65 -- RTU Open T--56 Sensor Connections

C08461

Page 36

Wiring the Indoor Air Quality Sensor: For each sensor, use two 2--conductor 18 AWG (American Wire Gage) 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, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 49. Connect the 4--20 mA terminal to RTU Open J4--2 and connect the SIG COM terminal to RTU Open J4--3. See Fig. 67.

IAQ Sensor

4-20mA

SIG COM

24 VAC

50TC--*16

Fig. 67 -- RTU Open / Indoor CO2Sensor

(33ZCSENCO2) Connections

Outdoor Air Quality Sensor0 (PNO 33ZCSENCO2 plus weatherproof enclosure) —

The outdoor air CO dioxide (CO

) levels in the outside ventilation air and

sensor is designed to monitor carbon

interface with the ventilation damper in an HVAC system. The OAQ sensor is packaged with an outdoor cover. See Fig. 51. The outdoor air CO

sensor must be located in the

economizer outside air hood.

Wiring the Outdoor Air CO

Sensor: A dedicated

power supply is required for this sensor. A two--wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2.

To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the OAQ sensor. See Fig. 49. Connect the 4 to 20 mA terminal to RTU Open J4--5. Connect the SIG COM terminal to RTU Open J4--6. See Fig. 68.

J4-2

J4-3

C10738

Space Relative Humidity Sensor or Humidistat — Humidi--MiZer

Control Wiring: In units equipped

with the Humidi--MiZer option there are two pink (PNK) wires loose in the control box used to control the dehumidification function of the unit. These pink wires are meant to be tied to a space humidistat or thermidistat on an electromechanical unit. On RTU Open equipped units these pink wires must be connected to J11--7 & 8 to allow the Open board to operate the dehumidification function for the unit. Disconnect the J11 Phoenix style connector from the board and use the plug screws to secure the pink wires in pins 7 and 8, reconnect the plug to the board at J11.

Relative Humidity Sensors (Space or Duct Mounted):

The accessory space humidity sensor (33ZCSENSRH-01) or duct humidity sensor (33ZCSENDRH-01) is used to measure the relative humidity of air within the space or return air duct. The RH reading is used to control the Humidi--MiZer option of the rooftop unit. For wiring distances up to 500 ft (152 m), use a 3--conductor, 18 or 20 AWG shielded cable. The shield must be removed from the sensor end of the cable and grounded at the unit end. The current loop power for sensor is provided by the RTU Open controller as 24vdc. Refer to the instructions supplied with the RH sensor for the electrical requirements and terminal locations. RTU Open configurations must be changed after adding an RH sensor. See Fig. 69 and 70 for typical RH sensor wiring.

S J4--1 or J4--4 = 24vdc loop power S J4--2 or J4--5 = 4--20mA signal input

NOTE: The factory default for dehumidification control is normally open humidistat.

MOUNTING HOLES

Gnd

Vin

WIRING OPENING

OAQ Sensor/RH Sensor

4-20mA

SIG COM

24 VAC

Fig. 68 -- RTU Open / Outdoor CO2Sensor

(33ZCSENCO2) Connections

J4-5

J4-6

C10739

SW2

123456

Vin - J4-1 or J4-4 24Vdc Io - J4-2 or J4-5 -20mA output

Fig. 69 -- Space Relative Humidity Sensor Typical Wiring

C11087

Page 37

J4-1 or J4-4 + 24 VDC Supply Voltage

J4-2 or J4-5 (-) 4 to 20 mA Current Loop Output

to RTU-OPEN

4-20 VAC GND 0-5V mA or or VDC 0-10V

SPAN

Relative Humidity Sensor (Polarized Male Connector)

ZERO

Fig. 70 -- Duct Relative Humidity Sensor Typical Wiring

Humidistat: The accessory humidistat provides the RTU

Open insight to the relative humidity in the space. The humidistat reads the RH level in the space and compares it to its setpoint to operate a dry contact. The humidistat is a dedicated input on the configurable input 9 and tells the RTU Open when the RH level is HIGH or LOW. The normal condition for humidity is LOW. A normally open humidistat is the factory default control for the Humidi--MiZer

option.

To wire in the field:

S J5--8 = 24 VAC source for dry contact S J5--7 = Signal input

Smoke Detector/Fire Shutdown (FSD) —

On 50TC--D16 units equipped with factory--installed Smoke Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The RTU Open controller communicates the smoke detector’s tripped status to the BAS building control. See Figs. 62 and 63, the RTU Open System Control Wiring Diagrams.

The Fire Shutdown Switch configuration,

→

Config→Inputs→input 5, identifies the normally

open status of this input when there is no fire alarm.

Connecting Discrete Inputs — Filter Status: The filter status accessory is a

field--installed accessory. This accessory detects plugged filters. When installing this accessory, the unit must be configured for filter status by setting

→

Config→Inputs→input3,5,8,or9to Filter

Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 60 and Fig. 62 or Fig. 63 for wire terminations at J5.

C10839

Fan Status: The fan status accessory is a field--installed accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, the unit must be configured for fan status by setting

→

Config→Inputs→input3,5,8,or9to Fan

Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 60 and Fig. 62 or Fig. 63 for wire terminations at J5.

Remote Occupancy: The remote occupancy accessory is a field--installed accessory. This accessory overrides the unoccupied mode and puts the unit in occupied mode. When installing this accessory, the unit must be configured for remote occupancy by setting

→

Config→Inputs→input3,5,8,or9to Remote

Occupancy and normally open (N/O) or normally closed (N/C).

→

Also set MENU

Schedules→occupancy source to DI

on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 60 and Table 7 for wire terminations at J5.

Power Exhaust (output): The relay used by the RTU Open board to control power exhaust is a dry contact which means it does not have 24vac. This 24vac must be connected to the relay to allow it to operate the power exhaust relay in the PE accessory. A 24vac source must be provided to J11--2 on the RTU Open control board. This can be provided by the unit’s transformer from various sources. The “R” terminal on the unit’s low voltage terminal board (LVTB) is a logical source. Refer to Fig. 60 and Fig. 62 or Fig. 63 for wire terminations at J11.

50TC--*16

Page 38

Communication Wiring -- Protocols

The RTU Open can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks.

General —

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 71 and 72 for protocol switch settings and address switches. The 3rd party connection to the RTU Open is through plug J19. See Fig. 73 for wiring.

NOTE: Power must be cycled after changing the SW1--3 switch settings.

Refer to the RTU Open Controller Integration Guide (Catalog No. 11--808--428--01) for more detailed information on protocols, 3rd party wiring, and networking.

SW3 Protoco l Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1

BACnet MS/TP (Master)

Modbus

50TC--*16

(Slave)

N2 (Slave)

LonWorks Unused ON ON OFF ON OFF OFF OFF

NOTE: DS = Dip Switch BACnet MS/TP SW3 example shown

Unused OFF OFF OFF ON OFF Select Baud Select Baud

Unused OFF OFF ON ON OFF Select Baud Select Baud

Unused OFF OFF OFF ON ON OFF OFF

Baud Rate Selections

BAUD RATE DS2 DS1

9600 OFF OFF

19,200 ON OFF

38,400 OFF ON

76,800 ON ON

Fig. 71 -- RTU Open SW3 Dip Switch Settings

Fig. 72 -- RTU Open Address Switches

C07166

C10815

Fig. 73 -- Network Wiring

C10816

Page 39

Local Access —

BACview6Handheld: The BACview

is a keypad/display interface used to connect to the RTU Open to access the control information, read sensor values, and test the RTU, see Fig. 74. This is an accessory interface that does not come with the RTU Open controller and can only be used

at the unit. Connect the BACview

to the RTU Open J12 local access port. There are 2 password protected levels in the display (User and Admin). The user password is defaulted to 0000 but can be changed. The Admin password is 1111 and cannot be changed. There is a 10 minute auto logout if a screen is idle. See Form 48--50HCTQ--01T, Appendix A for navigation and screen content.

Virtual BACview: Virtual BACview is a freeware computer

program that functions as the BACview

Handheld. The USB Link interface (USB--L) is required to connect a computer to the RTU Open board. The link cable connects a USB port to the J12 local access port. This program functions and operates identically to the handheld.

RTU Open Troubleshooting — Communication LEDs: The LEDs indicate if the

controller is speaking to the devices on the network. The LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the LEDs will appear.

50TC--*16

Cable

Access Port

P1 P1

J12

P5 P5

BACview

Fig. 74 -- BACview6Handheld Connections

Protocol Selector

RTU Open

Local Access Cable

C10812

Page 40

Table 8 – LEDs

The LEDs on the RTU Open Control Board (see Fig. 60) show the status of certain functions:

If this LED is on... Status is...

Power RTU Open has power

Rx RTU Open is receiving data from the network segment

Tx RTU Open is transmitting data over the network segment

DO# The digital output is active

The Run and Error LEDs indicate control module and network status

If Run LED shows...

And Error LED shows... Status is...

2 flashes per second Off Normal

2 flashes per second

2 flashes per second On

50TC--*16

2flashes, alternating with Run LED

3flashes, then off

4flashes, then pause

Five minute auto --- restart delay after system error

Control module has just been formatted

Two or more devices on this network have the same ARC156 network address

Exec halted after frequent system errors or control programs halted

5 flashes per second On Exec start- --up aborted, Boot is running

5 flashes per second Off Firmware transfer in progress, Boot is running

7 flashes per second

14 flashes per second

7 flashes per second, alternating with Run LED

14 flashes per second, alternating with Run LED

Ten second recovery period after brownout

Brownout

Failure. Try the following solutions: S TurnRTUOpenoff,thenon.

On On

S Format RTU Open. S Download memory to RTU Open. S Replace RTU Open.

NOTE: Refer to Catalog No. 48--50HCTQ--01T for complete configuration of RTU Open operating sequences and troubleshooting information. Refer to RTU Open Controller Integration Guide (Catalog No. 11--808--428--01) for details on configuration and troubleshooting of connected networks. Have a copy of these manuals available at unit start--up.

Differential Enthalpy Control —

Differential enthalpy control is provided by sensing and comparing the outside air and return air enthalpy conditions. Install the outdoor air enthalpy control as described above. Add and install a return air enthalpy sensor.

Return Air Enthalpy Sensor —

Outdoor Air Enthalpy Control (PNO 33CSENTHSW)

The enthalpy control (33CSENTHSW) is available as a field--installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of the enthalpy control. (The separate field--installed accessory return air enthalpy sensor (33CSENTSEN) is required for differential enthalpy control. See Fig. 75.)

Locate the enthalpy control in the economizer next to the Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 75. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK (connect to GND).

The outdoor enthalpy changeover setpoint is set at the enthalpy controller.

Mount the return--air enthalpy sensor (33CSENTSEN) in the return--air section of the economizer. The return air sensor is wired to the enthalpy controller (33CSENTHSW). See Fig. 75.

– 4-20 Main

+ VDC Out

Outside Air Enthalpy Switch

+ 24-36 VDC In

– 4-20 Main Out

24V

GND

LOW

RED

BLK

GRA

Return Air Enthalpy Sensor

PL6-1 (24-V)

PL6-4 (COM)

CTB ECON

(P’LINK: to J4-2) or (RTU Open: to J2-6)

C11161

Fig. 75 -- Outside and Return Air Enthalpy Sensor

Wiring

Page 41

To wire the return air enthalpy sensor, perform the following:

1. Use a 2--conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller.

2. Connect the field--supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (+) terminal on the enthalpy controller. Connect the BLK wire to (--) spade connector on the return air enthalpy sensor and the (--) terminal on the enthalpy controller.

Smoke Detectors

Smoke detectors are available as factory--installed options on 50TC--D16 units. Smoke detectors may be specified for Supply Air only or for Return Air without or with economizer or in combination of Supply Air and Return Air. Return Air smoke detectors are arranged for vertical return configurations only. All components necessary for operation are factory--provided and mounted. The unit is factory--configured for immediate smoke detector shutdown operation; additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements.

Controll er housing

and electronics

Conduit c ouplings

(supplie d by installer)

Alarm

Duct smoke sensor

controller

Fastener

(2X)

Conduit nuts

(supplie d by installer)

Conduit s upport plate

Terminal block cover

(ordering option)

Troub le

Power

Test/reset switch

Cover gasket

Controll er cover

50TC--*16

Units equipped with factory--optional Return Air smoke detectors require a relocation of the sensor module at unit installation. See “Completing Installation of Return Air

Smoke Sensor:” on page 43 for details. System —

The smoke detector system consists of a four--wire controller and one or two sensors. Its primary function is to shut down the rooftop unit in order to prevent smoke from circulating throughout the building. It is not to be used as a life saving device.

Controller —

The controller (see Fig. 76) includes a controller housing, a printed circuit board, and a clear plastic cover. The controller can be connected to one or two compatible duct smoke sensors. The clear plastic cover is secured to the housing with a single captive screw for easy access to the wiring terminals. The controller has three LEDs (for Power, Trouble and Alarm) and a manual test/reset button, all located on the cover face.

Sensor Module —

The sensor module (see Fig. 77) includes a plastic housing, a printed circuit board, a clear plastic cover, a sampling tube inlet and an exhaust tube. The sampling tube (when used) and exhaust tube are attached during installation. The sampling tube varies in length depending on the size of the rooftop unit. The clear plastic cover permits visual inspections without having to disassemble the sensor. The cover attaches to the sensor housing using four captive screws and forms an airtight chamber around the sensing electronics. Each sensor includes a harness with an RJ45 terminal for connecting to the controller. Each sensor has four LEDs (for Power, Trouble, Alarm and Dirty) and a manual test/reset button (on the left--side of the housing).

Fig. 76 -- Controller Assembly

Duct smoke sensor

Exhaust tube

See

Detail A

Intake

gasket

Plug

TSD-CO2

(ordering option)

Sampling tube

(ordered separately)

Magnetic test/reset

switch

Exhaust gasket

Coupling

Alarm

Troub le

Sensor housing and electro nics

Power Dirty

Fig. 77 -- Smoke Detector Sensor Module

Cover gasket

(ordering option)

C08208

Sensor cover

C08209

Page 42

Air is introduced to the duct smoke detector sensor’s sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through a (shorter) exhaust tube. The difference in air pressure between the two tubes pulls the sampled air through the sensing chamber. When a sufficient amount of smoke is detected in the sensing chamber, the sensor signals an alarm state and the controller automatically takes the appropriate action to shut down fans and blowers, change over air handling systems, notify the fire alarm control panel, etc.

The sensor uses a process called differential sensing to prevent gradual environmental changes from triggering false alarms. A rapid change in environmental conditions, such as smoke from a fire, causes the sensor to signal an alarm state but dust and debris accumulated over time does not.

For installations using two sensors, the duct smoke detector does not differentiate which sensor signals an alarm or trouble condition.

50TC--*16

Smoke Detector Locations

Supply Air —

The Supply Air smoke detector sensor is located to the left of the unit’s indoor (supply) fan. See Fig. 78. Access is through the left side blower access panel. There is no sampling tube used at this location. The sampling tube inlet extends through the side plate of the fan housing (into a high pressure area). The controller is located on a bracket to the right of the return filter, accessed through the lift--off filter panel.

Return Air without Economizer —

The sampling tube is located across the return air opening on the unit basepan. See Fig. 81. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat--mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See “Completing Installation of Return Air Smoke

Sensor:” for details.) Return Air with Economizer —

The sampling tube is inserted through the side plates of the economizer housing, placing it across the return air opening on the unit basepan. See Fig. 79. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat--mounting location. Installation requires that this sensor be relocated to its operating location and the tubing to the sampling tube be connected. See the following installation procedure.)

Flexible Exhaust Tube

Smoke Detector Sensor

C08245

Fig. 78 -- Typical Supply Air Smoke Detector Sensor

Location

Return Air Sampling Tube

C10330

Fig. 79 -- Return Air Sampling Tube Location

Page 43

Completing Installation of Return Air Smoke Sensor:

1. Unscrew the two screws holding the Return Air Sensor detector plate. See Fig. 80. Save the screws.

2. Remove the Return Air Sensor and its detector plate.

3. Rotate the detector plate so the sensor is facing outwards and the sampling tube connection is on the bottom. See Fig. 81.

4. Screw the sensor and detector plate into its operating position using screws from Step 1. Make sure the sampling tube connection is on the bottom and the exhaust tube is on the top. See Fig. 81.

5. Connect the flexible tube on the sampling inlet to the sampling tube on the basepan.

Controlle

Screws

Flexible Exhaust Tubes

Sampling Tube

Fig. 80 -- Return Air Detector Shipping Position

C10331

Sampling Tube

C10332

Fig. 81 -- Return Air Sensor Operating Position

Additional Application Data —

Refer to Catalog No. HKRNKA--1XA for discussions on additional control features of these smoke detectors including multiple unit coordination.

50TC--*16

Page 44

50TC--*16

Table 9 – Unit Wire/Fuse or HACR Breaker Sizing Data

ELEC. HTR PE NO C.O. or UNPWR C.O.

NO P.E. w/ P.E. (pwrd fr/unit)

UNIT

CRHEATER

IFM TYPE

*** --- A00

N O M . V --- P h --- H z

NONE ---

291A00 12.4/16.5 34.4/39.7 68.3/68.3 80/80 71/71 396/396 72.1/72.1 80/80 76/76 400/400

294A00 25.2/33.5 69.9/80.6 96.8/110.1 100/125 89/101 396/396 101.5/114.9 110/125 93/106 400/400

288A00,294A00 32.7/43.5 90.7/104.7 122.8/140.3 125/ 150 113/129 396/396 127.5/145.0 150/150 117/133 400/400

STD

291A00,294A00 37.6/50.0 104.3/120.3 139.8/129.7 150/ 150 129/147 396/396 144.5/134.4 150/150 133/151 400/400

294A00,294A00 50.3/67.0 139.7/161.2 149.1/170.6 175/ 200 169/194 396/396 153.8/175.3 175/200 174/198 400/400

NONE --- ---

291A00 12.4/16.5 34.4/39.7 70.8/70.8 80/80 74/74 413/413 74.6/74.6 90/90 79/79 417/417

294A00 25.2/33.5 69.9/80.6 99.9/113.3 100/125 92/104 413/413 104.6/118.0 110/125 96/109 417/417

288A00,294A00 32.7/43.5 90.7/104.7 125.9/143.4 150/ 150 116/132 413/413 130.6/148.1 150/150 120/136 417/417

MED

291A00,294A00 37.6/50.0 104.3/120.3 142.9/132.8 150/ 150 131/150 413/413 147.6/137.6 150/150 136/154 417/417

208/230--- 3 --- 60

294A00,294A00 50.3/67.0 139.7/161.2 152.2/173.7 175/ 200 172/197 413/413 157.0/178.5 175/200 177/201 417/417

NONE --- ---

291A00 12.4/16.5 34.4/39.7 81.2/81.2 100/100 86/86 432/432 85.0/85.0 100/100 91/91 436/436

294A00 25.2/33.5 69.9/80.6 112.9/126.3 125/150 104/116 432/432 117.6/131.0 125/150 108/121 436/436

288A00,294A00 32.7/43.5 90.7/104.7 138.9/156.4 150/ 175 128/144 432/432 143.6/161.1 150/175 132/148 436/436

HIGH

291A00,294A00 37.6/50.0 104.3/120.3 155.9/145.8 175/ 175 143/162 432/432 160.6/150.6 175/175 148/166 436/436

294A00,294A00 50.3/67.0 139.7/161.2 165.2/186.7 175/ 225 184/209 432/432 170.0/191.5 175/225 188/213 436/436

NONE --- ---

292A00 16.5 19.9 34.0 45 35 234 35.8 45 37 236

295A00 33.5 40.3 54.6 60 50 234 56.9 60 52 236

289A00,295A00 43.5 52.3 69.6 70 64 234 71.9 80 66 236

STD

292A00,295A00 50.0 60.2 64.5 70 73 234 66.7 70 75 236

295A00,295A00 67.0 80.6 84.9 90 97 234 87.1 100 99 236

NONE --- ---

292A00 16.5 19.9 35.0 45 37 243 36.8 45 39 245

295A00 33.5 40.3 55.9 60 51 243 58.1 60 53 245

289A00,295A00 43.5 52.3 70.9 80 65 243 73.1 80 67 245

MED

50TC ---*16

292A00,295A00 50.0 60.2 65.7 80 74 243 68.0 80 76 245

4 6 0 --- 3 --- 6 0

295A00,295A00 67.0 80.6 86.1 100 98 243 88.4 100 100 245

NONE --- ---

292A00 16.5 19.9 40.8 50 43 252 42.6 50 45 254

295A00 33.5 40.3 63.1 70 58 252 65.4 70 60 254

289A00,295A00 43.5 52.3 78.1 80 72 252 80.4 90 74 254

HIGH

292A00,295A00 50.0 60.2 73.0 80 81 252 75.2 80 83 254

295A00,295A00 67.0 80.6 93.4 100 104 252 95.6 100 106 254

NONE --- ---

293A00 16.5 15.9 26.5 30 28 184 30.3 40 32 188

296A00 33.5 32.2 43.8 45 40 184 48.5 50 45 188

290A00,296A00 43.5 41.8 55.8 60 51 184 60.5 70 56 188

STD

293A00,296A00 50.0 48.1 51.6 60 59 184 56.4 60 63 188

296A00,296A00 67.0 64.4 67.9 80 77 184 72.7 80 82 188

NONE --- ---

293A00 16.5 15.9 26.5 30 28 184 30.3 40 32 188

296A00 33.5 32.2 43.8 45 40 184 48.5 50 45 188

290A00,296A00 43.5 41.8 55.8 60 51 184 60.5 70 56 188

MED

293A00,296A00 50.0 48.1 51.6 60 59 184 56.4 60 63 188

5 7 5 --- 3 --- 6 0

296A00,296A00 67.0 64.4 67.9 80 77 184 72.7 80 82 188

NONE --- ---

293A00 16.5 15.9 32.7 40 35 196 36.5 45 39 200

296A00 33.5 32.2 51.5 60 47 196 56.3 60 52 200

290A00,296A00 43.5 41.8 63.5 70 58 196 68.3 70 63 200

HIGH

293A00,296A00 50.0 48.1 59.4 70 66 196 64.1 70 70 200

296A00,296A00 67.0 64.4 75.7 80 84 196 80.4 90 89 200

Nom (kW)

FLA FLA

3.8

1.8

3.8

MCA

68.3 80 71 396 72.1 80 76 400

70.8 80 74 413 74.6 90 79 417

81.2 100 86 432 85.0 100 91 436

34.0 45 35 234 35.8 45 37 236

40.8 50 43 252 42.6 50 45 254

26.5 30 28 184 30.3 40 32 188

32.7 40 35 196 36.5 45 39 200

FUSE or

HACR BRKR

35 45 37 243 36.8 45 39 245

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE or

HACR BRKR

DISC. SIZE

NOTE: See page 46 for table legend and notes.

Page 45

Table 9 – Unit Wire/Fuse or HACR Breaker Sizing Data (cont)

ELEC. HTR PE w/ PWRD C.O.

NO P.E. w/ P.E. (pwrd fr/unit)

UNIT

CRHEATER

IFM TYPE

***A00

N O M . V --- P h --- H z

NONE --- ---

291A00 12.4/16.5 34.4/39.7 73.1/73.1 80/80 77/77 401/401 76.9/76.9 100/100 81/81 405/405

294A00 25.2/33.5 69.9/80.6 102.8/116.1 110/125 95/107 401/401 107.5/120.9 110/125 99/111 405/405

288A00,294A00 32.7/43.5 90.7/104.7 128.8/146.3 150/ 150 118/135 401/401 133.5/151.0 150/175 123/139 405/405

STD

291A00,294A00 37.6/50.0 104.3/120.3 145.8/135.7 150/ 150 134/152 401/401 150.5/140.4 175/150 138/157 405/405

294A00,294A00 50.3/67.0 139.7/161.2 155.1/176.6 175/ 200 175/200 401/401 159.8/181.3 175/200 179/204 405/405

NONE --- ---

291A00 12.4/16.5 34.4/39.7 75.6/75.6 100/100 80/80 418/418 79.4/79.4 100/100 84/84 422/422

294A00 25.2/33.5 69.9/80.6 105.9/119.3 110/125 97/110 418/418 110.6/124.0 125/125 102/ 114 422/422

288A00,294A00 32.7/43.5 90.7/104.7 131.9/149.4 150/ 150 121/137 418/418 136.6/154.1 150/175 126/142 422/422

MED

291A00,294A00 37.6/50.0 104.3/120.3 148.9/138.8 150/ 150 137/155 418/418 153.6/143.6 175/175 141/160 422/422

208/230--- 3 --- 60

294A00,294A00 50.3/67.0 139.7/161.2 158.2/179.7 175/ 200 178/202 418/418 163.0/184.5 175/200 182/207 422/422

NONE --- ---

291A00 12.4/16.5 34.4/39.7 86.0/86.0 100/100 92/92 437/437 89.8/89.8 100/100 96/96 441/441

294A00 25.2/33.5 69.9/80.6 118.9/132.3 125/150 109/122 437/437 123.6/137.0 125/150 114/126 441/441

288A00,294A00 32.7/43.5 90.7/104.7 144.9/162.4 150/ 175 133/149 437/437 149.6/167.1 150/175 138/154 441/441

HIGH

291A00,294A00 37.6/50.0 104.3/120.3 161.9/151.8 175/ 175 149/167 437/437 166.6/156.6 175/175 153/172 441/441

294A00,294A00 50.3/67.0 139.7/161.2 171.2/192.7 200/ 225 190/214 437/437 176.0/197.5 200/225 194/219 441/441

NONE --- ---

292A00 16.5 19.9 36.2 45 38 236 38.0 50 40 238

295A00 33.5 40.3 57.4 60 53 236 59.6 60 55 238

289A00,295A00 43.5 52.3 72.4 80 67 236 74.6 80 69 238

STD

292A00,295A00 50.0 60.2 67.2 80 76 236 69.5 80 78 238

295A00,295A00 67.0 80.6 87.6 100 99 236 89.9 100 101 238

NONE --- ---

292A00 16.5 19.9 37.2 50 39 245 39.0 50 41 247

295A00 33.5 40.3 58.6 60 54 245 60.9 70 56 247

289A00,295A00 43.5 52.3 73.6 80 68 245 75.9 80 70 247

MED

50TC ---*16

292A00,295A00 50.0 60.2 68.5 80 77 245 70.7 80 79 247

4 6 0 --- 3 --- 6 0

295A00,295A00 67.0 80.6 88.9 100 100 245 91.1 100 102 247

NONE --- ---

292A00 16.5 19.9 43.0 50 46 254 44.8 50 48 256

295A00 33.5 40.3 65.9 70 61 254 68.1 70 63 256

289A00,295A00 43.5 52.3 80.9 90 74 254 83.1 90 76 256

HIGH

292A00,295A00 50.0 60.2 75.7 80 83 254 78.0 80 86 256

295A00,295A00 67.0 80.6 96.1 100 107 254 98.4 100 109 256

NONE --- ---

293A00 16.5 15.9 28.2 35 30 186 32.0 40 34 190

296A00 33.5 32.2 45.9 50 42 186 50.6 60 47 190

STD

290A00,296A00 43.5 41.8 57.9 60 53 186 62.6 70 58 190

293A00,296A00 50.0 48.1 53.7 60 60 186 58.5 60 65 190

296A00,296A00 67.0 64.4 70.0 80 79 186 74.8 80 84 190

NONE --- ---

293A00 16.5 15.9 28.2 35 30 186 32.0 40 34 190

296A00 33.5 32.2 45.9 50 42 186 50.6 60 47 190

290A00,296A00 43.5 41.8 57.9 60 53 186 62.6 70 58 190

MED

293A00,296A00 50.0 48.1 53.7 60 60 186 58.5 60 65 190

5 7 5 --- 3 --- 6 0

296A00,296A00 67.0 64.4 70.0 80 79 186 74.8 80 84 190

NONE --- ---

293A00 16.5 15.9 34.4 40 37 198 38.2 45 41 202

296A00 33.5 32.2 53.6 60 49 198 58.4 60 54 202

290A00,296A00 43.5 41.8 65.6 70 60 198 70.4 80 65 202

HIGH

293A00,296A00 50.0 48.1 61.5 70 68 198 66.2 70 72 202

296A00,296A00 67.0 64.4 77.8 80 86 198 82.5 90 91 202

Nom (kW)

FLA FLA

3.8

1.8

3.8

MCA

73.1 80 77 401 76.9 100 81 405

75.6 100 80 418 79.4 100 84 422

36.2 45 38 236 38.0 50 40 238

37.2 50 39 245 39 50 41 247

28.2 35 30 186 32.0 40 34 190

28.2 35 30 186 32 40 34 190

34.4 40 37 198 38.2 45 41 202

FUSE or

HACR BRKR

86 100 92 437 89.8 100 96 441

43 50 46 254 44.8 50 48 256

DISC. SIZE

MCA

FLA LRA FLA LRA

FUSE or

HACR BRKR

DISC. SIZE

50TC--*16

NOTE: See page 46 for table legend and notes.

Page 46

Legend and Notes for Table 9

LEGEND:

BRKR --- Circuit breaker CO --- Convenience outlet DISC --- Disconnect FLA --- Full load amps IFM --- Indoor fan motor LRA --- Locked rotor amps MCA --- Minimum circuit amps P E --- P o we r e x ha u s t PWRD CO --- Powered convenient outlet UNPWR CO -- - Unpowered convenient outlet NOTES:

1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and

440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percentage of voltage imbalance.

% Voltage Imbalance = 100 x

50TC--*16

max voltage deviation from average voltage

average voltage

Example: Supply voltage is 230-3-60

AB = 224 v BC = 231 v AC = 226 v

Average Voltage =

Determine maximum deviation from average voltage. (AB) 227 – 224 = 3 v (BC) 231 – 227 = 4 v (AC) 227 – 226 = 1 v Maximum deviation is 4 v. Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

This amount of p hase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

(224 + 231 + 226)

= 227

= 1.76%

227

681

Economizer 2 Position Damper

Fig. 82 -- EconoMi$ert IV Wiring

Step 11 — Adjust Factory--Installed Options

Smoke Detectors —

Smoke detector(s) will be connected at the Central Terminal Board (CTB, at terminals marked “Smoke Shutdown”. Remove jumper JMP 3 when ready to energize unit.

Unit Without Economizer or 2 Position Damper

C10333

EconoMi$er IV Occupancy Switch —

Refer to Fig. 82 for general EconoMi$er IV wiring. External occupancy control is managed through a connection on the Central Terminal Board.

If external occupancy control is desired, connect a time clock or remotely controlled switch (closed for Occupied, open for Unoccupied sequence) at terminals marked OCCUPANCY on CTB. Remove or cut jumper JMP 2 to complete the installation.

Page 47

Step 12 — Install Accessories

Available accessories include:

Roof Curb (must be installed before unit) Thru--base connection kit (must be installed before unit

is set on curb) Manual outside air damper Two--Position motorized outside air damper EconoMi$er IV (with control and integrated barometric

relief) EconoMi$er2 (without control/for external signal and

integrated barometric relief) Barometric relief Power Exhaust Differential dry--bulb sensor (EconoMi$er IV) Outdoor enthalpy sensor Differential enthalpy sensor Time Guard II compressor anti--cycle control Outdoor coil protector grille Head pressure control Programmable setback thermostat Electrical/Mechanical thermostat and subbase Thermidistatt device Humidistat Electric Heaters Single Point kits Thermostat / Sensors CO

sensor

DDC interface (PremierLink) Louvered hail guard Phase monitor control

Refer to separate installation instructions for information on installing these accessories.

Pre--Start and Start--Up

This completes the mechanical installation of the unit. Refer to the unit’s Service Manual for detailed Pre--Start and Start--up instructions.

50TC--*16

Page 48

50TC--*16

Manufacturer reserves the right to change, at any ti me, specifications and designs without notice and without obligations.

Catalog No: 50TC--- 14SI

Replaces: 50TC--- 11SI