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50PTH024

Carrier 50PTV024, 50PTH024, 50PTV036, 50PTV060, 50PTV048 Installation, Start-up And Service Instructions Manual

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Page 1
Aquazone™
50PTH, PTV024-070
Two-Stage Water Source Heat Pumps
®
with Puron
Refrigerant (R-410A)
Installation, Start-Up, and Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . 1,2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• STORAGE
•PROTECTION
•INSPECT UNIT
Step 3 — Locate Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 — Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . . . 7
• HORIZONTAL UNIT
• VERTICAL UNITS
Step 5 — Check Duct System . . . . . . . . . . . . . . . . . . . . 7
Step 6 — Install Condensate Drain . . . . . . . . . . . . . . . 7
Step 7 — Pipe Connections . . . . . . . . . . . . . . . . . . . . . . 8
• WATER LOOP APPLICATIONS
• GROUND-WATER APPLICATIONS
• GROUND-LOOP APPLICATIONS
• INSTALLATION OF SUPPLY AND RETURN HOSE KIT
Step 8 — Wire Field Power Supply . . . . . . . . . . . . . . 10
Step 9 — Wire Field Controls. . . . . . . . . . . . . . . . . . . . 21
• CONSTANT TORQUE MOTORS (ECM)
• SAFETY DEVICES AND COMPLETE C CONTROL
Operate ECM Interface Board . . . . . . . . . . . . . . . . . . . 23
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-27
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 25
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 25
Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 25
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 27
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 27
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27,28
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Units with Aquazone™ Complete C Control . . . . . 27
Units with Aquazone Deluxe D Control . . . . . . . . . . 27
Units with Hot Gas Reheat Option. . . . . . . . . . . . . . . 27
COMPLETE C AND DELUXE D BOARD
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
LED Fault Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Board Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-30
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Water Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 28
Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Fan Motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Page
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 29
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 29
Refrigerant Charging.
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 30
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 30-33
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Control Sensors
Thermostatic Expansion Valves . . . . . . . . . . . . . . . . . 30
Moisture Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
50PTH,PTV START-UP
CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2
IMPORTANT: Read the entire instruction manual before starting installation.
. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func­tions such as cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, ob­serve precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.
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 a local 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 cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and the National Electrical Code (NEC) for special installation requirements.
Understand the signal words — DANGER, WARNING, and CAUTION. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards that could result in personal inju­ry or death. CAUTION is used to identify unsafe practices, which would result in minor personal injury or product and property damage.
Recognize safety information. This is the safety-alert symbol ( ). When this symbol is displayed on the unit and in instructions or manuals, be alert to the potential for personal injury.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500104-01 Printed in U.S.A. Form 50PT-5SI Pg 1 1218 6-14 Replaces: NEW
Page 2
WARNING
Electrical shock can cause personal injury or death. Before installing or servicing system, always turn off main power to system. There may be more than one disconnect switch. Turn off accessory heater power if applicable.
GENERAL
This installation and start-up instructions literature is for
Aquazone™ two-stage water source heat pump systems.
Water source heat pumps (WSHPs) are single-package hori­zontally and vertically mounted units with electronic controls designed for year-round cooling and heating.
IMPORTANT: The installation of water source heat pump units and all associated components, parts, and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsi­bility of the installing contractor to determine and comply with ALL applicable codes and regulations.
INSTALLATION
Step 1 — Check Jobsite —
maintenance instructions are provided with each unit. Before unit start-up, read all manuals and become familiar with the unit and its operation. Thoroughly check out the system before operation. Complete the inspections and instructions listed below to prepare a unit for installation. See Table 1 for unit physical data.
IMPORTANT: This equipment is designed for indoor installation ONLY. Extreme variations in temperature, humidity and corrosive water or air will adversely affect the unit performance, reliability and service life.
HORIZONTAL UNIT (50PTH) — Horizontal units are designed for indoor installation only. Be sure to allow adequate space around the unit for servicing. See Fig. 1 and 2 for overall unit dimensions.
VERTICAL UNITS (50PTV) — Vertical units are designed for indoor installations. While vertical units are typically installed in a floor-level closet or a small mechanical room, the unit access guidelines for these units are very similar to those described for horizontal units. See Fig. 3 for overall dimen­sions.
Installation, operation and
CAUTION
1. Be sure that the location chosen for unit installation pro­vides ambient temperatures maintained above freezing.
2. Be sure the installation location is isolated from sleeping areas, private offices and other acoustically sensitive spaces.
3. Be sure unit is mounted at a height sufficient to provide an adequate slope of the condensate lines. If an appropri­ate slope cannot be achieved, a field-supplied condensate pump may be required.
4. On horizontal units, allow adequate room below the unit for condensate drain trap and do not locate the unit above supply piping.
5. Provide sufficient space for duct connection. Do not al­low the weight of the ductwork to rest on the unit.
6. Provide adequate clearance for filter replacement and drain pan cleaning. Do not allow piping, conduit, etc. to block filter access.
7. Provide sufficient access to allow maintenance and servicing of the fan and fan motor, compressor and coils. Removal of the entire unit from the closet should not be necessary.
8. Provide an unobstructed path to the unit within the closet or mechanical room. Space should be sufficient to allow return air to freely enter the space.
9. Provide ready access to water valves and fittings, and screwdriver access to unit side panels, discharge collar, and all electrical connections.
10. Where access to side panels is limited, pre-removal of the control box side mounting screws may be necessary for future servicing.
STORAGE — If the equipment is not needed for immediate installation upon its arrival at the job site, it should be left in its shipping carton and stored in a clean, dry area. Units must only be stored or moved in the normal upright position as indicated by the UP arrows on each carton at all times. If unit stacking is required, stack units as follows: vertical units less than 6 tons, no more than two high; horizontal units less than 6 tons, no more than three high. Do not stack units larger than 6 tons.
PROTECTION — Once the units are properly positioned on the jobsite, cover them with either a shipping carton, vinyl film, or an equivalent protective covering. Cap open ends of pipes stored on the jobsite. This precaution is especially important in areas where painting, plastering, or spraying of fireproof mate­rial, etc. is not yet complete. Foreign material that accumulates within the units can prevent proper start-up and necessitate costly clean-up operations.
Before installing any of the system components, be sure to examine each pipe, fitting, and valve, and remove any dirt or foreign material found in or on these components.
To avoid equipment damage, do not use these units as a source of heating or cooling during the construction pro­cess. The mechanical components and filters used in these units quickly become clogged with construction dirt and debris which may cause system damage.
Step 2 — Check Unit — Upon receipt of shipment at
the jobsite, carefully check the shipment against the bill of lading. Make sure all units have been received. Inspect the car­ton or crating of each unit, and inspect each unit for damage. Ensure the shipping company makes proper notation of any shortages or damage on all copies of the freight bill. Concealed damage not discovered during unloading must be reported to the shipping company within 15 days of receipt of shipment.
NOTE: It is the responsibility of the purchaser to file all neces­sary claims with the shipping company.
CAUTION
DO NOT store or install units in corrosive environments or in locations subject to temperature or humidity extremes (e.g., attics, garages, rooftops, etc.). Corrosive conditions and high temperature or humidity can significantly reduce performance, reliability, and service life. Always move units in an upright position. Tilting units on their sides may cause equipment damage.
2
Page 3
INSPECT UNIT — To prepare the unit for installation, com­plete the procedures listed below:
6. Remove the shipping bolts from compressor support plate to maximize vibration and sound alternation.
1. Compare the electrical data on the unit nameplate with ordering and shipping information to verify that the correct unit has been shipped.
2. Do not remove the packaging until the unit is ready for installation.
Failure to remove shipping brackets from spring-mounted compressors will cause excessive noise and could cause component failure due to added vibration.
CAUTION
3. Verify that the unit’s refrigerant tubing is free of kinks or dents, and that it does not touch other unit components.
4. Inspect all electrical connections. Be sure connections are clean and tight at their terminations.
5. Loosen compressor bolts until the compressor rides freely on springs. Remove shipping restraints.
7. Remove any blower support cardboard from inlet of the blower.
8. Locate and verify any accessory kit located in compressor and/or blower section.
9. Remove any access panel screws that may be difficult to remove once unit is installed.
Table 1 — Physical Data — 50PTH, PTV024-070 Units
UNIT 50PTH, PTV 024 036 048 060 070
COMPRESSOR (1 each) Scroll
REFRIGERANT CHARGE VERTICAL (oz) 58 98 88 110 114
REFRIGERATION CHARGE HORIZONTAL ONLY (oz) 64 85 77 100 114
MAXIMUM WATER WORKING PRESSURE (psig/kPa) 450/3,100 450/3,100 450/3,100 450/3,100 450/3,100
CONSTANT TORQUE - FAN MOTOR/BLOWER
Fan Motor Type/Speeds Constant Torque / 5 speed Fan Motor (Hp) 0.33 0.75 0.75 1.00 1.00 Blower Wheel Size (Dia x W) (in.) 10 x 8 11 x 9 11 x 9 11 x 11 11 x 11
ECM CONSTANT AIRFLOW - FAN MOTOR/BLOWER
Fan Motor Type/Speeds ECM Constant airflow / 3 speed Fan Motor (Hp) 0.33 0.75 0.75 1.00 1.00 Blower Wheel Size (Dia x W) (in.) 10 x 8 11 x 9 11 x 9 11 x 11 11 x 11
WATER CONNECTION SIZE
FPT (in.) Coaxial Coil Volume (gal) 0.33 1.18 0.62 1.07 1.12
VERTICAL CABINET
Air Coil
Dimensions (H x W) (in.) 24 x 20 Nominal Size (in.) Standard Filter - 2-in. MERV11
(L x H) (qty)
Weight (lb)
Operating 250 360 340 410 440 Shipping 350 475 450 530 560
HORIZONTAL CABINET
Air Coil
Dimensions (H x W) (in.) 18 x 31.5 Nominal Size (in.) Standard Filter - 2-in. MERV11
(L x H) (qty)
Weight (lb)
Operating 260 375 355 430 460 Shipping 360 495 470 550 580
LEGEND
ECM — Electronically Commutated Motor
3
/
4
24 x 24 (1) 16 x 30 (2) 16 x 30 (2) 20 x 30 (2) 20 x 30 (2)
18 x 18 (2) 20 x 24 (2) 20 x 24 (2) 18 x 20 (3) 18 x 20 (3)
1111
32 x 26
20 x 42
32 x 26
20 x 42
38 x 26 38 x 26
20 x 49 20 x 49
3
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*
*
Fig. 1 — 50PTH024-070 Units Supply Air Configuration - End Blow Dimensional Data
4
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*
*
Fig. 2 — 50PTH024-070 Units Supply Air Configuration - Straight Through Dimensional Data
*
5
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SUPPLY AIR
DUCT FLANGES
RETURN AIR
DUCT FLANGES
SUPPLY AIR
DUCT FLANGES
F
AA
RIGHT HAND RETURN
RETURN AIR
DUCT FLANGES
VW
ELECTRICAL HEATER
KNOCKOUT*
E
G
WATER OU T
ELECTRICAL
CONDENSATE
DRAIN**
KNOCKOUTS
J
K
WATER IN
L
LEFT HAND RETURN
N
M
F
B
U
U
T
V
W
Fig. 3 — 50PTV024-070 Dimensional Data
T
H
D
C
* ELECTRIC HEATER IS OPTIONAL FEATURE.
** CONDENSATE DRAIN CONNECTION 3/4-IN. FPT.
NOTES:
1. ALL DIMENSIONS ARE WITHIN ± 0.125 INCH.
2. RETURN AND SUPPLY AIR DUCT FLANGES SHIPPED UNFOLDED.
3. ALL DIMENSIONS ARE IN INCHES.
4. SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
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Step 3 — Locate Unit — Locate the unit in an indoor
VIBRATION
PAD FULL SIZE
area that allows easy removal of the filter and access panels, with enough room for service personnel to perform mainte­nance or repair. Provide sufficient room to make fluid, electri­cal, and duct connections. If the unit is located in a confined space such as a closet, provisions must be made for return air to freely enter the face of unit’s air coil. On horizontal units, allow adequate room below the unit for a condensate drain trap and do not locate the unit above supply piping.
Step 4 — Mount the Unit
HORIZONTAL UNIT (50PTH) — While horizontal units may be installed on any level surface strong enough to hold their weight, they are typically suspended above a ceiling by threaded rods. The manufacturer recommends these be at­tached to the unit corners by hanger bracket kits. The rods must be securely anchored to the ceiling. Refer to the hanging brack­et assembly and installation instructions for details.
CAUTION
To avoid equipment damage, ensure horizontal units installed above the ceiling conform to all local codes. An auxiliary drain pan, if required by code, should be at least 4 in. larger than the bottom of the heat pump.
Plumbing connected to the heat pump must not come in di­rect contact with joists, trusses, walls, etc. Some applications require an attic floor installation of the horizontal unit. In this case the unit should be set in a full size secondary drain pan on top of a vibration absorbing mesh.
The secondary drain pan prevents possible condensate over­flow or water leakage damage to the ceiling.
The secondary drain pan is usually placed on a plywood base isolated from the ceiling joists by additional layers of vi­bration absorbing mesh. In both cases, a to this secondary pan should be run to an eave at a location that will be noticeable.
If the unit is located in a crawl space, the bottom of the unit must be at least 4-in. above grade to prevent flooding of the electrical parts during heavy rains.
3
/4-in. drain connected
ductwork is not recommended as the unit’s performance will be adversely affected.
CAUTION
To avoid equipment damage, do not connect discharge ducts directly to the blower outlet.
The factory-provided air filter must be removed when using a filter back return air grille. The factory filter should be left in place on a free return system.
If the unit will be installed in a new installation which in­cludes new ductwork, the installation should be designed using current ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) procedures for duct sizing. If the unit is to be connected to existing ductwork, a check should be made to assure that the duct system has the capacity to han­dle the air required for the unit application. If the duct system is too small, larger ductwork should be installed. Check for exist­ing leaks and repair.
The duct system and all diffusers should be sized to handle the designed airflow quietly. To maximize sound attenuation of the unit blower, the supply and return air plenums should be in­sulated. There should be no direct straight air path through the return air grille into the heat pump. The return air inlet to the heat pump must have at least one 90-degree turn away from the space return air grille. If air noise or excessive airflow are a problem, the blower speed can be changed to a lower speed to reduce airflow.
IMPORTANT: Horizontal units must be installed pitched toward the condensate drain connection
1
/8-in. per foot.
VERTICAL UNITS (50PTV) — Vertical units should be mounted level on a vibration absorbing pad slightly larger than the base to minimize vibration transmission to the building structure. It is not necessary to anchor the unit to the floor. (See Fig. 4.)
IMPORTANT: On vertical units the condensate drain pan is internally sloped. There is no internal P-Trap.
Step 5 — Check Duct System — A supply air out-
let collar and return air duct flange are provided on all units to facilitate duct connections.
IMPORTANT: Supply air duct and return air duct flanges are shipped unfolded with unit.
Fold the duct flange outwards along the perforated line. Re-
fer to Fig. 1-3 for physical dimensions of the collar and flange.
A flexible connector is recommended for supply and return air duct connections on metal duct systems. All metal ducting should be insulated with a minimum of 1 in. duct insulation to avoid heat loss or gain and prevent condensate forming during the cooling operation. Application of the unit to uninsulated
Fig. 4 — Vertical Unit on Vibration Pad
Step 6 — Install Condensate Drain — A drain
line must be connected to the heat pump and pitched away from the unit a minimum of densate to flow away from the unit. (See Fig. 5.)
This connection must be in conformance with local plumb­ing codes. A trap must be installed in the condensate line to en­sure free condensate flow.
1
/8-in. per foot to allow the con-
7
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Fig. 5 — Condensate Trapping
Boiler Drains (field-installed)
Strainer (field-installed accessory) (16 to 20 mesh recommended for filter sediment)
Shut-Off Valve (field-installed accessory)
Water Control Valve (field-installed accessory)
Flow Regulator (field-installed accessory)
Pressure
Tank
Water Out
Water In From Pump
IMPORTANT: Horizontal heat pump drain pan is not inter­nally slopped.
A vertical air vent is sometimes required to avoid air pock­ets. The length of the trap depends on the amount of positive or negative pressure on the drain pan. A second trap must not be included.
Step 7 — Pipe Connections — Depending on the
application, there are 3 types of WSHP piping systems to choose from: water loop, ground-water and ground loop. Refer to Piping Section of Carrier System Design Manual for addi­tional information.
All WSHP units use low temperature soldered female pipe thread fittings for water connections to prevent annealing and out-of-round leak problems which are typically associated with high temperature brazed connections. Refer to Table 1 for con­nection sizes. When making piping connections, consider the following:
• Use a backup wrench when making screw connections to
unit to prevent internal damage to piping.
• Insulation may be required on piping to avoid condensa-
tion in the case where fluid in loop piping operates at
temperatures below dew point of adjacent air.
• Piping systems that contain steel pipes or fittings may be
subject to galvanic corrosion. Dielectric fittings may be
used to isolate the steel parts of the system to avoid gal-
vanic corrosion.
WATER LOOP APPLICATIONS — Water loop applications usually include a number of units plumbed to a common pip­ing system. Maintenance to any of these units can introduce air into the piping system. Therefore, air elimination equipment comprises a major portion of the mechanical room plumbing.
The flow rate is usually set between 2.25 and 3.5 gpm per ton of cooling capacity. For proper maintenance and servicing, pressure-temperature ports are necessary for temperature and flow verification.
Cooling tower/boiler systems typically utilize a common loop maintained at 50 to 100 F. The use of a closed circuit evaporative cooling tower with a secondary heat exchange be­tween the tower and the water loop is recommended. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary.
In addition to complying with any applicable codes, consid­er the following for system piping:
• Piping systems using water temperatures below 50 F
require
1
/2-in. closed cell insulation on all piping sur-
faces to eliminate condensation.
• Avoid all plastic to metal threaded fittings due to the
potential to leak. Use a flange fitted substitute.
• Teflon tape thread sealant is recommended to minimize
internal fouling of the heat exchanger.
• Use backup wrench. Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Flush the piping system prior to operation to remove dirt
and foreign materials from the system.
GROUND-WATER APPLICATIONS — Typical ground­water piping is shown in Fig. 6. In addition to complying with any applicable codes, consider the following for sys­tem piping:
• Install shut-off valves for servicing.
• Install pressure-temperature plugs to measure flow and
temperature.
• Connect boiler drains and other valves using a “T” con-
nector to allow acid flushing for the heat exchanger.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Use PVC SCH80 or copper piping material.
NOTE: PVC SCH40 should not be used due to system high pressure and temperature extremes.
Fig. 6 — Typical Ground-Water Piping Installation
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Water Supply and Quantity
— Check water supply. Water supply should be plentiful and of good quality. See Table 2 for water quality guidelines.
IMPORTANT: Failure to comply with the above required water quality and quantity limitations and the closed­system application design requirements may cause damage to the tube-in-tube heat exchanger. This damage is not the responsibility of the manufacturer.
In all applications, the quality of the water circulated through the heat exchanger must fall within the ranges listed in the Water Quality Guidelines table. Consult a local water treat­ment firm, independent testing facility, or local water authority for specific recommendations to maintain water quality within the published limits.
Table 2 — Water Quality Guidelines
GROUND-LOOP APPLICATIONS — Temperatures between 20 and 110 F and a cooling capacity of 2.25 to 3 gpm of flow per ton is recommended. In addition to complying with any applicable codes, consider the following for system piping:
• Limit piping materials to only polyethylene fusion in the buried sections of the loop.
• Do not use galvanized or steel fittings at any time due to corrosion.
• Avoid all plastic to metal threaded fittings due to the potential to leak. Use a flange fitted substitute.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Use pressure-temperature plugs to measure flow of pres­sure drop.
CONDITION HX MATERIAL*
Scaling Potential — Primary Measurement
Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below.
pH/Calcium Hardness Method
Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.)
Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be imple­mented.
Ryznar Stability Index
Langelier Saturation Index
Iron Fouling
Corrosion Prevention††
Erosion and Clogging
HWG — Hot Water Generator HX — Heat Exchanger N/A — Design Limits Not Applicable Considering Recirculating
NR — Application Not Recommended SS — Stainless Steel
*Heat exchanger materials considered are copper, cupronickel, 304 SS
†Closed recirculating system is identified by a closed pressurized piping
**Recirculating open wells should obser ve the open recirculating design
2+
Iron Fe (Bacterial Iron Potential)
Iron Fouling
pH
Hydrogen Sulfide (H
Ammonia Ion as Hydroxide, Chloride, Nitrate and Sulfate Compounds
Maximum Chloride Levels Maximum allowable at maximum water temperature.
Particulate Size and Erosion
Brackish
(stainless steel), 316 SS, titanium.
system.
considerations.
(Ferrous)
Potabl e Water
S)
2
LEGEND
All N/A pH < 7.5 and Ca Hardness, <100 ppm
All N/A
All N/A
All N/A
All N/A
All
All N/A
All N/A
Copper N/A
Cupronickel N/A <150 ppm NR NR
304 SS N/A <400 ppm <250 ppm <150 ppm 316 SS N/A <1000 ppm <550 ppm <375 ppm
Titanium N/A >1000 ppm >550 ppm >375 ppm
All
All N/A
CLOSED
RECIRCULATING†
6 - 8.5
Monitor/treat as needed.
<10 ppm of particles and a maximum velocity of 6 fps.
Filtered for maximum
800 micron size.
OPEN LOOP AND RECIRCULATING WELL**
6.0 - 7.5
If >7.5 minimize steel pipe use.
–0.5 to +0.5
Based upon 150 F HWG and direct well, 85 F indirect well HX.
If Fe2+ (ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria.
Minimize steel pipe below 7 and no open tanks with pH <8.
At H2S>0.2 ppm, avoid use of copper and cupronickel piping or HXs.
Copper alloy (bronze or brass) cast components are okay to <0.5 ppm.
50 F (10 C) 75 F (24 C) 100 F (38 C)
<20 ppm NR NR
<10 ppm (<1 ppm “sandfree” for reinjection) of particles and a maximum velocity of 6 fps. Filtered for maximum 800 micron size. Any particulate that is not removed can potentially clog components.
Use cupronickel heat exchanger when concentrations of calcium or sodium chloride are greater than 125 ppm are present. (Seawater is approximately 25,000 ppm.)
††If the concentration of these corrosives exceeds the maximum allow-
able level, then the potential for serious corrosion problems exists. Sulfides in the water quickly oxidize when exposed to air, requiring that
no agitation occur as the sample is taken. Unless tested immediately at the site, the sample will require stabilization with a few drops of one Molar zinc acetate solution, allowing accurate sulfide determination up to 24 hours after sampling. A low pH and high alkalinity can cause system problems, even when both values are within ranges shown. The term pH refers to the acidity, basicity, or neutrality of the water supply. Below 7.0, the water is considered to be acidic. Above 7.0, water is considered to be basic. Neutral water registers a pH of 7.0. To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm. considered to be basic. Neutral water contains a pH of 7.0. To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm.
If <–0.5 minimize steel pipe use.
<0.2 ppm (Ferrous)
<0.5 ppm of Oxygen
Above this level deposition will occur.
6 - 8.5
<0.5 ppm
Rotten egg smell appears at 0.5 ppm level.
<0.5 ppm
9
Page 10
INSTALLATION OF SUPPLY AND RETURN HOSE KIT — Follow these piping guidelines.
1. Install a drain valve at the base of each supply and return riser to facilitate system flushing.
2. Install shutoff/balancing valves and unions at each unit to permit unit removal for servicing.
3. Place strainers at the inlet of each system circulating pump.
4. Select the proper hose length to allow slack between con­nection points. Hoses may vary in length by +2% to –4% under pressure.
5. Refer to Table . Do not exceed the minimum bend radius for the hose selected. Exceeding the minimum bend radi­us may cause the hose to collapse, which reduces water flow rate. Install an angle adapter to avoid sharp bends in the hose when the radius falls below the required mini­mum.
NOTE: Piping must comply with all applicable codes.
Table 3 — Metal Hose Minimum Bend Radii
HOSE DIAMETER (in.) MINIMUM BEND RADII (in.)
1
/
2
3
/
4
15
21/
2
4
1
/
2
Insulation is not required on loop water piping except where the piping runs through unheated areas or outside the building or when the loop water temperature is below the minimum ex­pected dew point of the pipe ambient. Insulation is required if loop water temperature drops below the dew point.
CAUTION
Do not bend or kink supply lines or hoses.
Pipe joint compound is not necessary when Teflon* thread­ed tape is pre-applied to hose assemblies or when flared-end connections are used. If pipe joint compound is preferred, use compound only in small amounts on the male pipe threads of the fitting adapters. Prevent sealant from reaching the flared surfaces of the joint.
NOTE: When anti-freeze is used in the loop, assure that it is compatible with Teflon tape or pipe joint compound employed.
Maximum allowable torque for brass fittings is 30 ft-lb. If a torque wrench is not available, tighten finger-tight plus one quarter turn. Tighten steel fittings as necessary.
Optional pressure-rated hose assemblies designed specifi­cally for use with Carrier units are available. Similar hoses can be obtained from alternate suppliers. Supply and return hoses are fitted with swivel-joint fittings at one end to prevent kink­ing during installation.
Refer to Fig. 7 for an illustration of a supply/return hose kit. Male adapters secure hose assemblies to the unit and risers. In­stall hose assemblies properly and check them regularly to avoid system failure and reduced service life.
Rib Crimped
Length
(2 ft Length Standard)
Swivel Brass Fitting
Brass Fitting
MPT
Fig. 7 — Supply/Return Hose Kit
Step 8 — Wire Field Power Supply
WARNING
To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.
CAUTION
Operating the unit with improper line voltage or with excessive phase imbalance is hazardous to the unit and constitutes abuse and is not covered under warranty.
All field wiring must comply with local and national fire, safety and electrical codes. Power to the unit must be within the operating voltage range indicated on the unit’s nameplate.
Properly sized fuses or HACR circuit breakers must be in­stalled for branch circuit protection. See unit nameplate for maximum fuse or breaker size. The unit is provided with a con­centric knock-out for attaching common trade sizes of conduit; route power supply wiring through this opening. Always con­nect the ground lead to the grounding lug provided in the con­trol box and power leads to the line side of compressor contac­tor as indicated on the wiring diagram. See Fig. 8 and 9 for control box layout. See Tables 4-6 for additional electrical data.
Units supplied with internal electric heat require two sepa­rate power supplies: Unit compressor and electric heat, blower motor and control circuit. Refer to Fig. 10-17. See data plate for minimum circuit ampacities and maximum fuse/breaker sizing.
CAUTION
Backup wrench is required when tightening water connec­tions to prevent water line damage.
* Registered trademark of DuPont.
10
Page 11
4
5
16
3
2
21
6
7
8
9
1
10
5
3
1—Compressor Contactor 2—Emergency Relay (Option) 3—Second Stage Relay 4—Hot Gas Reheat Relay (Option) 5—Cooling Relay 6—Complete C Control 7—Terminal Block Low-Voltage 8—Auxiliary Relay (Option) 9—Transformer 10 — Capacitor 16 — Comfort Alert Module (Option) 21 — Ground Lug
Fig. 8 — Single-Phase Unit
Control Box Layout
4
13
14
21
2
12
15
1—Compressor Contactor 2—Emergency Relay (Option) 3—Second Stage Relay 4—Hot Gas Reheat Relay (Option) 5—Cooling Relay 6—Complete C Control 7—Terminal Block Low-Voltage 8—Auxiliary Relay (Option) 9—Transformer 12 — Phase Monitor 13 — Fan Status Switch (Option) 14 — Pump Status Switch (Option) 15 — Terminal Block 460-v Units (Option) 21 — Ground Lug
1
Fig. 9 — Three-Phase Unit
Control Box Layout
6
7
8
9
UNIT SIZE COMPRESSOR
8733902168 208/230-1-60 197/253 1 11.7 58.3 2.8 17.4 25 2.8 17.4 25
50PT024
50PT036
50PT048
50PT060
50PT070
ECM — Electronically Commutated Motor FLA — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration LRA — Locked Rotor Amps MAX — Maximum MIN — Minimum RLA — Rated Load Amps
8733801381 265/277-1-60 — 1 9.1 54.0 2.6 14.0 20 2.6 14.0 20 8733801385 208/230-3-60 197/253 1 6.5 55.4 2.8 10.9 15 2.8 10.9 15 8733801392 460-3-60 — 1 3.5 28.0 2.1 6.4 15 2.6 6.9 15 8733902169 208/230-1-60 197/253 1 15.3 83.0 6.0 25.1 35 6.8 25.9 35 8733801382 265/277-1-60 — 1 13.0 72.0 4.9 21.2 30 5.5 21.8 35 8733801386 208/230-3-60 197/253 1 11.6 73.0 6.0 20.5 30 6.8 21.3 30 8733903844 460-3-60 - 1 5.7 38.0 3.2 10.4 15 5.5 12.6 15 8733902170 208/230-1-60 197/253 1 21.2 104.0 6.0 32.4 50 6.8 33.2 50 8733801387 208/230-3-60 197/253 1 14.0 83.1 6.0 23.5 35 6.8 24.3 35 8733801393 460-3-60 - 1 6.4 41.0 3.2 11.3 15 5.5 13.5 15 8733902171 208/230-1-60 197/253 1 27.1 152.9 7.6 41.5 60 9.1 43.0 70 8733801388 208/230-3-60 197/253 1 16.5 110.0 7.6 28.3 40 9.1 29.8 45 8733801394 460-3-60 - 1 7.2 52.0 4.0 13.1 20 6.9 16.0 20 8733902172 208/230-1-60 197/253 1 29.7 179.2 7.6 44.7 70 9.1 46.2 70 8733801389 208/230-3-60 197/253 1 17.6 136.0 7.6 29.6 45 9.1 31.1 45 8733801395 460-3-60 - 1 8.5 66.1 4.0 14.6 20 6.9 17.5 25
LEGEND
VOLTAGE
RATED
v-ph-Hz
Table 4 — 50PTH,PTV Blower Motor Electrical Data
VOLTAGE
MIN/MAX
COMPRESSOR
QTY RLA LRA FLA
TOTAL UNIT CONST TORQUE
MOTOR (STANDARD)
MIN CIRCUIT
AMPS
MAX FUSE/
HACR
TOTAL UNIT ECM CONST airflow
MOTOR (OPTION)
FLA
MIN CIRCUIT
AMPS
MAX FUSE/
HACR
11
Page 12
Table 5 — 50PTH,PTV Units with Electric Heat Option — Constant Torque Motor Electrical Data
UNIT SIZE
EH — Electric Heat FLA — Full Load Amps MCA — Minimum Circuit Amps MOP — Maximum Overcurrent Protection
EH RATED
kW
024 4.8 1 4,800 3,600 20.0 17.3 2.8 — 28.5 25.1 30 30
036
048
060
070
4.8 1 4,800 3,600 20.0 17.3 6.0 — 32.5 29.1 35 30
9.6 1 9,600 7,200 40.0 34.6 6.0 — 57.5 50.8 60 60
4.8 1 4,800 3,600 20.0 17.3 6.0 — 32.5 29.1 35 30
9.6 1 9,600 7,200 40.0 34.6 6.0 — 57.5 50.8 60 60
14.4 2 14,400 10,800 60.0 51.9 6.0
4.8 1 4,800 3,600 20.0 17.3 7.6 — 34.5 31.1 35 35
9.6 1 9,600 7,200 40.0 34.6 7.6 — 59.5 52.8 60 60
14.4 2 14,400 10,800 60.0 51.9 7.6
19.2 2 19,200 14,000 80.0 69.2 7.6
4.8 1 4,800 3,600 20.0 17.3 7.6 — 34.5 31.1 35 35
9.6 1 9,600 7,200 40.0 34.6 7.6 — 52.8 52.8 60 60
14.4 2 14,400 10,800 60.0 51.9 7.6
19.2 2 19,200 14,000 80.0 69.2 7.6
STAGE
LEGEND
HEATER WATTS HEATER AMPS
240 208
240 208 FUSES 240 208 240 208
MOTOR FLA
(A)
CIRCUIT
F1/F2 F3/F4
F1/F2 F3/F4 F1/F2 F3/F4
F1/F2 F3/F4 F1/F2 F3/F4
MCA
82.5 72.4 90 80
84.5 74.4 90 80
109.5 96.0 110 100
84.5 74.4 90 80
109.5 96.0 110 100
MOP
Table 6 — 50PTH,PTV Units with Electric Heat Option — Constant Airflow ECM Motor Electrical Data
UNIT SIZE
EH — Electric Heat FLA — Full Load Amps MCA — Minimum Circuit Amps MOP — Maximum Overcurrent Protection
EH RATED
kW
024 4.8 1 4,800 3,600 20.0 17.3 2.8 — 28.5 25.1 30 30
036
048
060
070
4.8 1 4,800 3,600 20.0 17.3 6.8 — 33.5 30.1 35 35
9.6 1 9,600 7,200 40.0 34.6 6.8 — 58.5 51.8 60 60
4.8 1 4,800 3,600 20.0 17.3 6.8 — 33.5 30.1 35 35
9.6 1 9,600 7,200 40.0 34.6 6.8 — 58.5 51.8 60 60
14.4 2 14,400 10,800 60.0 51.9
4.8 1 4,800 3,600 20.0 17.3 9.1 — 36.4 33.0 40 35
9.6 1 9,600 7,200 40.0 34.6 9.1 — 61.4 54.6 70 60
14.4 2 14,400 10,800 60.0 51.9 9.1
19.2 2 19,200 14,000 80.0 69.2 9.1
4.8 1 4,800 3,600 20.0 17.3 9.1 — 36.4 33.0 40 35
9.6 1 9,600 7,200 40.0 34.6 9.1 — 61.4 54.6 70 60
14.4 2 14,400 10,800 60.0 51.9 9.1
19.2 2 19,200 14,000 80.0 69.2 9.1
STAGE
LEGEND
HEATER WATTS HEATER AMPS
240 208
240 208 FUSES 240 208 240 208
MOTOR FLA
(A)
6.8 F1/F2
6.8 F3/F4
CIRCUIT
F1/F2 F3/F4 F1/F2 F3/F4
F1/F2 F3/F4 F1/F2 F3/F4
MCA
83.5 73.4 90 80
86.4 76.3 90 80
111.4 97.9 125 100
86.4 76.3 90 80
111.4 97.9 125 100
MOP
12
Page 13
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD FROM 240 TERMINAL
AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
5. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
6. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
7. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
8. DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN.
9. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
10. CHECK FOR PROPER PHASE ROTATION ON UNITS WITH SCROLL COMPRESSORS. REVERSE ROTATION WILL DAMAGE THE COMPRESSOR AND VOID UNIT WARRANTY.
11. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
COMPLETE C
SEE NOTES 5-9
Fig. 10 — Constant Torque Motor, Single Phase/Single Stage Two Step, Complete C Control
13
Page 14
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD FROM 240 TERMINAL
AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
5. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
6. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
7. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
8. DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN.
9. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
10. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
COMPLETE C
SEE NOTES 5-9
14
Fig. 11 — Constant Airflow ECM Motor, Single Phase/Single Stage Two Step, Complete C Control
Page 15
DELUXE D
ECM – ELECTRONICALLY COMMUTATED MOTOR
15
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD AND REPLACE WITH
RED LEAD. CAP ALL UNUSED LEADS.
4. FOR ALTERNATIVE EMS COIL VOLTAGES CONSULT FACTORY.
5. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
6. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
7. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
8. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
9. DEFAULT SETTINGS FOR DELUXE D BOARD FROM FACTORY SHOWN.
10. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
11. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
12. BCA CONTACTS R-Y OPEN ON DROP IN WATER TEMPERATURE AND R-B CLOSE.
Fig. 12 — Constant Torque Motor, Single Phase/Single Stage Two Step, Deluxe D Control
Page 16
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD
FROM 240 TERMINAL AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. FOR ALTERNATIVE EMS COIL VOLTAGES CONSULT FACTORY.
5. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
6. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
7. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
8. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
9. DEFAULT SETTINGS FOR DELUXE D BOARD FROM FACTORY SHOWN.
10. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
11. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
12. BCA CONTACTS R-Y OPEN ON DROP IN WATER TEMPERATURE AND R-B CLOSE.
DELUXE D
16
Fig. 13 — Constant Airflow ECM Motor, Single Phase/Single Stage Two Step, Deluxe D Control
Page 17
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD FROM 240 TERMINAL
AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
5. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
6. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
7. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
8. DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN.
9. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
10. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
11. PUMP MOTOR IS WIRED BETWEEN LINE AND NEUTRAL FOR 308-460VAC UNITS. FOR 208/230VAC UNITS PUMP MOTOR IS WIRED BETWEEN LINES.
COMPLETE C
ECM – ELECTRONICALLY COMMUTATED MOTOR
SEE NOTES 5-9
Fig. 14 — Constant Torque Motor, Three Phase/Single Stage Two Step, Complete C Control
17
Page 18
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD FROM 240 TERMINAL
AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
5. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
6. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
7. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
8. DEFAULT SETTINGS FOR DELUXE D BOARD FROM FACTORY SHOWN.
9. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
10. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
11. PUMP MOTOR IS WIRED BETWEEN LINE AND NEUTRAL FOR 308-460VAC UNITS. FOR 208/230VAC UNITS PUMP MOTOR IS WIRED BETWEEN LINES.
12. BCA CONTACTS R-Y OPEN ON DROP IN WATER TEMPERATURE AND R-B CLOSE.
DELUXE D
SEE NOTES 5-9
Fig. 15 — Constant Torque Motor, Three Phase/Single Stage Two Step, Deluxe D Control
18
Page 19
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD
FROM 240 TERMINAL AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
5. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
6. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
7. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
8. DEFAULT SETTINGS FOR COMPLETE C BOARD FROM FACTORY SHOWN.
9. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
10. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
11. PUMP MOTOR IS WIRED BETWEEN LINE AND NEUTRAL FOR 380-460VAC UNITS. FOR 208/230VAC UNITS PUMP MOTOR IS WIRED BETWEEN LINES.
12. EON MOTOR IS WIRED BETWEEN LINE AND NEUTRAL FOR 380-460VAC UNITS. FOR 208/230VAC UNITS EON MOTOR IS WIRED BETWEEN LINES.
COMPLETE C
SEE NOTES 5-9
19
Fig. 16 — Constant Airflow ECM Motor, Three Phase/Single Stage Two Step, Complete C Control
Page 20
NOTES:
1. SEE UNIT NAMEPLATE FOR ELECTRICAL RATING.
2. ALL FIELD WIRING MUST BE IN ACCORDANCE WITH NEC-NFPA #70, COPPER CONDUCTORS ONLY.
3. 208/230V UNITS ARE FACTORY WIRED FOR 230V OPERATION. FOR 208V OPERATION, REMOVE LEAD
FROM 240 TERMINAL AND CONNECT IT TO 208. CAP ALL UNUSED TERMINALS.
4. FOR ALTERNATIVE EMS COIL VOLTAGES CONSULT FACTORY.
5. UPM-1 INCLUDES BUILT IN: 270-300 SECOND RANDOM START
300 SECOND DELAY ON BREAK
120 SECOND LOW PRESSURE BYPASS
6. “TEST” DIP SWITCH REDUCES DELAYS TO 10 SEC WHEN SET TO YES. MUST BE SET TO “NO” FOR NORMAL OPERATION.
7. “FREEZE SENSOR” ON CONDENSER WILL OPERATE AT 26 F BY DEFAULT, IF 15 F OPERATION IS REQUIRED JUMPER R30 MUST BE CUT.
IF FREEZE SENSOR IS NOT INSTALLED A JUMPER SHALL BE INSTALLED BETWEEN THE FREEZE1 OR FREEZE2 SENSOR TERMINALS.
8. “ALARM OUTPUT” DIP SWITCH MUST BE SET TO “PULSE” IF BLINKING T-STAT SERVICE LIGHT IS DESIRED.
9. DEFAULT SETTINGS FOR DELUXE D BOARD FROM FACTORY SHOWN.
10. ALARM OUTPUT IS NORMALLY OPEN (NO) DRY CONTACT. IF 24 VAC IS NEEDED, CONNECT R TO ALR-COM TERMINAL. 24 VAC WILL BE SENSED
ON THE ALR-OUT WHEN THE UNIT IS IN ALARM CONDITION. OUTPUT WILL BE PULSED IF PULSE IS SELECTED.
11. FACTORY-MOUNTED LOOP PUMP OR TWO-WAY WATER VALVE. BOTH DEVICES WILL NOT BE PRESENT IN THE SAME UNIT.
12. PUMP MOTOR IS WIRED BETWEEN LINE AND NEUTRAL FOR 380-460VAC UNITS. FOR 208-230VAC UNITS PUMP MOTOR IS WIRED BETWEEN LINES.
13. EON MOTOR IS WIRED BETWEEN LINE AND NEUTRAL FOR 380-460VAC UNITS. FOR 208/230VAC UNITS WON MOTOR IS WIRED BETWEEN LINES.
14. BCA CONTACTS R-Y OPEN ON DROP IN WATER TEMPERATURE AND R-B CLOSE.
DELUXE D
20
Fig. 17 — Constant Airflow ECM Motor, Three Phase/Single Stage Two Step, Deluxe D Control
Page 21
Step 9 — Wire Field Controls
1
2
3
4
5
6
7
9
10
11
1213
17
14
15
16
8
WARNING
To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.
CAUTION
Operating the unit with improper line voltage or with excessive phase imbalance is hazardous to the unit and constitutes abuse and is not covered under warranty.
All field wiring must comply with local and national fire, safety and electrical codes. Power to the unit must be within the operating voltage range indicated on the unit’s nameplate.
Properly sized fuses or HACR circuit breakers must be in­stalled for branch circuit protection. See unit nameplate for maximum fuse or breaker size. The unit is provided with a con­centric knock-out for attaching common trade sizes of conduit, route power supply wiring through this opening. Always con­nect the ground lead to the grounding lug provided in the con­trol box and power leads to the line side of compressor contac­tor as indicated on the wiring diagram.
CONSTANT TORQUE MOTORS (ECM) — For installa­tions where the efficiency of an electronically commutated brushless DC motor (ECM) motor is required, but the features of a constant airflow motor are not required and comes stan­dard with the constant torque ECM motor option. These mo­tors feature up to 90% thermal efficiency combined with a flat­ter fan curve than a PSC motor and simple operation.
These motors are provided with 5 speed taps to allow for a wide range of airflow and external static options. To change a speed tap follow the instructions below:
1. Disconnect power to the heat pump.
2. Remove the blower access panel.
3. Remove the speed tap wire from the terminal it is current­ly connected to and connect it to the terminal desired.
Refer to Tables 7 and 8 for constant torque motor perfor­mance tables for heat pump blower performance with the con­stant torque motor option.
SAFETY DEVICES AND COMPLETE C CONTROL — Each unit is factory provided with a Complete C board control­ler that controls the compressor operation and monitors the safety.
• Low-pressure switch located in the unit refrigerant suc­tion line and wired across terminals LPC1 and LPC2 on the Complete C Board.
• Complete C Board Dry Contacts are Normally Open (NO).
• Water side freeze protection sensor, mounted close to condensing water coil, monitors refrigerant temperature between condensing water coil and thermal expansion valve. See Fig. 19. If temperature drops below or remains at freeze limit trip for 30 seconds, the controller will shut down the compressor and enter into a soft lock­out condition. The default freeze limit trip is 30 F, how­ever this can be changed to 15 F by cutting the R30 or Freeze1 resistor located on top of DIP switch SW1. Refer to Fig. 18 item 3 for resistor location.
• Evaporator freeze protection sensor, mounted between the thermal expansion device and the evaporator, moni­tors refrigerant temperature between the evaporator coil and thermal expansion valve. See Fig. 20. If temperature drops below or remains at freeze limit trip for 30 sec­onds, the controller will shut down the compressor and enter into a soft lockout condition. The default freeze limit trip is 30 F.
• The condensate overflow protection sensor is located in the drain pan of the unit and connected to the ‘COND’ terminal on the Complete C board.
IMPORTANT: If the thermostat is provided with a mal­function light powered off of the common (C) side of the transformer, a jumper between R and COM terminal of ALR contacts must be made.
IMPORTANT: If the thermostat is provided with a mal­function light powered off of the hot (R) side of the trans­former, then the thermostat malfunction light connection should be connected directly to the (ALR) contact on the unit’s Complete C board.
If the unit is being connected to a thermostat with a mal­function light, this connection is made at the unit malfunction output or relay. See to Fig. 18.
Safety controls include the following:
• High-pressure switch located in the refrigerant discharge
line and wired across the HPC terminals on the Complete
C Board.
21
1—Board Power Indicator 2—Control C Status LED Indicator 3—Water Coil Freeze Protection Tem-
4—Air Coil Freeze Protection Tempera-
5—Control C Board Settings 6—Water Coil Freeze Connection 7—Air Coil Freeze Connection 8—LED Status-Diagnostic Connection 9—24VAC Power Input 10 — Compressor Contact Output 11 — High Pressure Switch Connection 12 — Call for Compressor Y1 13 — Low Pressure Switch Connection 14 — 24VAC Power Common 15 — Condensate Overflow Sensor 16 — Dry Contact 17 — Control C Ground Standoff
perature Selection [R30]
ture Selection
Fig. 18 — Complete C Control Board
Page 22
blink code explanation. The remote device must have a mal­function detection capability when the Complete C board is set to PULSE.
IMPORTANT: If 24 VAC output is needed R must be wired to ALR-COM terminal; 24 VAC will be available to the ALR-OUT terminal when the unit is in the alarm con­dition.
Fig. 19 — Water Freeze Protection Sensor
Location
Fig. 20 — No Freeze Protection Sensor
The C Board includes the following features:
Anti-short Cycle Time
— A 5-minute delay on break timer
prevents compressor short cycling. Random Start
— Each controller has a unique random start delay ranging from 270 to 300 seconds to reduce the chances of multiple units simultaneously starting after initial power up or after a power interruption, creating a large electrical spike.
Low Pressure Bypass Timer
— If the compressor is running and the low-pressure switch opens, the controller will keep the compressor ON for 120 seconds. If, after 120 seconds the low­pressure switch remains open, the controllers will shut down the compressor and enter a soft lockout. The compressor will not be energized until the low-pressure switch closes and the anti-short cycle time delay expires. If the low-pressure switch opens 2 to 4 times in 1 hour, the unit will enter a hard lockout. In order to exit hard lockout power to the unit would need to be reset.
Brownout/Surge/Power Interruption Protection
— The brownout protection in the Complete C board will shut down the compressor if the incoming power falls below 18 VAC. The compressor will remain OFF until the voltage is above 18 VAC and ANTI-SHORT CYCLE TIMER (300 seconds) times out. The unit will not go into a hard lockout.
Malfunction Output
— Alarm output is Normally Open (NO) dry contact. If pulse is selected the alarm output will be pulsed. The fault output will depend on the DIP switch setting for ALARM. If it is set to CONST, a constant signal will be pro­duced to indicate a fault has occurred and the unit requires in­spection to determine the type of fault. If it is set to PULSE, a pulse signal is produced and a fault code is detected by a re­mote device indicating the fault. See LED Fault Indication for
LED Annunciator
— This LED kit provides a quick visual in­dication of whether or not a heat pump is energized and if it has locked out on a fault. The LED kit is mounted to the electrical corner post of the heat pump and employs high intensity LEDs for better visibility. The LED kit will exactly mirror the LED blink codes on the Complete C board.
Test DIP Switch
— A test DIP switch is provided to reduce all time delays settings to 10 seconds during troubleshooting or verification of unit operation.
IMPORTANT: Operation of unit in test mode can lead to accelerated wear and premature failure of components. The "TEST" switch must be set back to "NO" after trouble­shooting or servicing.
Freeze Sensor
— The default setting for the freeze limit trip is 30 F (sensor number 1); however this can be changed to 15 F by cutting the R24 resistor located on top of the DIP switch SW1. Since freeze sensor 2 is dedicated to monitor the evapo­rator coil it is recommended to leave the factory default setting on the board. The Complete C controller will constantly moni­tor the refrigerant temperature with the sensor mounted close to the condensing water coil between the thermal expansion valve and water coil. If temperature drops below or remains at the freeze limit trip for 30 seconds, the controller will shut the compressor down and enter into a soft lockout condition. Both the status LED and the Alarm contact will be active. The LED will flash three times the code associated with this alarm condi­tion. If this alarm occurs 2 times (or 4 if DIP switch is set to 4) within an hour the Complete C controller will enter into a hard lockout condition. It will constantly monitor the refrigerant temperature with the sensor mounted close to the evaporator between the thermal expansion valve and evaporator coil. If temperature drops below or remains at the freeze limit trip for 30 seconds, the controller will shut the compressor down and enter into a soft lockout condition. Both the status LED and the Alarm contact will be active. The LED will flash three times the code associated with this alarm condition. If this alarm oc­curs 2 times (or 4 if DIP switch is set to 4) within an hour the controller will enter into a hard lockout condition.
IMPORTANT: Freeze sensor will not guard against loss of water. Flow switch is recommended to prevent unit from running if water flow is lost or reduced.
Intelligent Reset
— If a fault condition is initiated, the 5 min­ute delay on break time period is initiated and the unit will re­start after these delays expire. During this period the fault LED will indicate the cause of the fault. If the fault condition still ex­ists or occurs 2 or 4 times (depending on 2 or 4 setting for Lockout DIP switch) before 60 minutes, the unit will go into a hard lockout and requires a manual lockout reset. A single con­densate overflow fault will cause the unit to go into a hard lock­out immediately, and will require a manual lockout reset.
Lockout Reset
— A hard lockout can be reset by turning the unit thermostat off and then back on when the “RESET” DIP switch is set to “Y” or by shutting off unit power at the circuit breaker when the “RESET” DIP switch is set to “R.”
IMPORTANT: The blower motor will remain active dur­ing a lockout condition.
22
Page 23
Operate ECM Interface Board — In addition to pro-
RR
C1
C2
10
EM W1
O Y2 Y1
G
H
C
W2
W1
O
Y2
Y1
G
CFM
H
CFM
ADJUST
A B C D
NORM
[+] [-]
TEST
HGRH
YES
NO
HGRH
J01
R
C
G
O
Y1 Y2 W1 W2 H C
1
3
98
7
6
5
2
4
11
viding a connecting point for thermostat wiring, the interface
board also translates thermostat inputs into control commands
for the Electronic Commutated Motor (ECM) DC fan motor
and provides thermostat signlas to unit’s Complete C board.
The thermostat connections and their functions are shown in
Fig. 21.
IMPORTANT: CFM LED is an approximation. Utilize conventional Test and Balance equipment for accurate airflow measurement.
The CFM count indicator (See Fig. 21, item 6) blinks to indi-
cate approximate airflow in CFM and may flicker when unit is
off. Each blink of the LED represent approximately 100 CFM
of air delivery so if the LED blinks 12 times, pauses, blinks 12 times, etc. the blower is delivering approximately 1200 CFM.
THERMOSTAT OUTPUTS
Y1 First Stage Compressor Operation Y2 Second Stage Compressor Operation G Fan O Reversing Valve (energized in cooling) W1 Auxiliary Electric Heat (runs with compressor) EM/W2 Emergency Heat (electric heat only) NC Transformer 24 VAC Common (extra connection) C1 Transformer 24 VAC Common (primary connection) R Transformer 24 VAC Hot H Dehumidification Mode
1 Motor harness plug 2 Blower CFM adjustment 3 Motor settings 4 Dehumidification indication 5 Thermostat digital contact inputs 6 CFM count indicator 7 Thermostat input status indication 8 Reheat digital outputs
9 Thermostat outputs 10 24 VAC 11 Dehumidification method selector
Fig. 21 — ECM Interface Board Physical Layout
Table 7 — Constant Torque Motor Blower Performance Data
50PTH,
PTV
UNITS
024
036
048
060
070
——Operation Not Recommended FL — Full Load PL — Part Load
FAN
SPEED
LEGEND
RATED
AIRFLOW
(Cfm)
5950 4 3 2 1 5 4 3 2 1 5 4 3 2 1 5 4 3 2 1 5 4 3 2 1
825 1,072 1,018 966 915 866 818 772 727 725 976 920 867 815 766 719 674 631 650
500 829 750 676 610 551 498 451 412 1300 1100 1,425 1,326 1,250 1,191 1,143 1,100 1,056 1,006 942 860
950 1,354 1,233 1,138 1,063 1,002 950 901 850 791 719
800
750 1,213 1,084 976 886 812 750 698 653 612 573 1800 1600 1,774 1,738 1,703 1,669 1,635 1,600 1,562 1,521 1,475 1,423 1400 1,565 1,526 1,493 1,463 1,432 1,400 1,363 1,319 1,265 1,199 1300 1100 1,425 1,326 1,250 1,191 1,143 1,100 1,056 1,006 942 860 2200 2000 2,170 2,135 2,100 2,066 2,033 2,000 1,968 1,937 1,907 1,877 1,848 1,819 1800 1,942 1,914 1,886 1,858 1,829 1,800 1,770 1,741 1,710 1,680 1,649 1,617 1600 1400 1,561 1,520 1,483 1,451 1,423 1,400 1,381 1,366 1,356 1,350 1,349 1,352 2500 2350 2,566 2,529 2,489 2,446 2,399 2,350 2,298 2,242 2,184 2,122 2,057 1,990 2100 2,256 2,230 2,202 2,171 2,137 2,100 2,060 2,017 1,971 1,922 1,871 1,816 1850 1600 1,766 1,728 1,693 1,660 1,629 1,600 1,573 1,548 1,526 1,505 1,486 1,470
FAC TORY
PL/Fan Only
PL/Fan Only
PL/Fan Only
PL/Fan Only
PL/Fan Only
SETTING
FL
FL
FL
FL
FL
AIRFLOW (Cfm)
External Static Pressure (in. wg)
0.100.200.300.400.500.600.700.800.901.001.101.20
1,1541,1171,0771,034988938886830————
906 844 785 730 678 630 585 544
1,506 1,469 1,430 1,390 1,347 1,300 1,249 1,193 1,130 1,061
1,294 1,157 1,041 946 866 800 744 696 653 611
1,950 1,912 1,880 1,852 1,826 1,800 1,771 1,737 1,695 1,644
1,506 1,469 1,430 1,390 1,347 1,300 1,249 1,193 1,130 1,061
2,476 2,403 2,338 2,283 2,237 2,200 2,172 2,153 2,142 2,141 2,149 2,166
1,766 1,729 1,693 1,660 1,629 1,600 1,573 1,548 1,526 1,505 1,487 1,470
2,723 2,671 2,622 2,578 2,537 2,500 2,467 2,437 2,412 2,390 2,372 2,358
2,004 1,975 1,945 1,915 1,883 1,850 1,816 1,781 1,745 1,708 1,669 1,630
23
———— ———— ———— ————
—— —— —— —— —— —— —— —— —— ——
Page 24
Table 8 — ECM Constant CFM Motor Blower Performance Data
50PTH,
PTV
UNITS
024 PA RT LOAD
024 FULL LOAD
036 PA RT LOAD
036 FULL LOAD
048 PA RT LOAD
048 FULL LOAD
060 PA RT LOAD
060 FULL LOAD
070 PA RT LOAD
070 FULL LOAD
FAN
SPEED
High 725 + A 725 725 725 725 725 725 725 725 — —
Med
Low
High 950 + A 950 950 950 950 950 950 950 950 — —
Med
Low
High 950 + A 950 950 950 950 950 950 950 950 950 950
Med
Low
High 1300 + A 1,300 1,300 1,300 1,300 1,300 1,300 1,300 1,300 1,300 1,300
Med
Low
High 1400 + A 1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400
Med
Low
High 1800 + A 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800
Med
Low
High 1800 + A 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800
Med
Low
High 2200 + A 2,200 2,200 2,200 2,200 2,200 2,200 2,200 2,200 2,200 2,200
Med
Low
High 2100 + A 2,100 2,100 2,100 2,100 2,100 2,100 2,100 2,100 2,100 2,100
Med
Low
High 2500 + A 2,500 2,500 2,500 2,500 2,500 2,500 2,500 2,500 2,500 2,500
Med
Low
RATED
AIRFLOW
(Cfm)
650 Normal
500 -
825 Normal
725 -
800 Normal
750 -
1100 Normal
950 -
1300 Normal
1100 -
1600 Normal
1400 -
1600 Normal
1400 -
2000 Normal
18000 -
1850 Normal
1600 -
2350 Normal
2100 -
ADJUSTMENT TAP
0.100.200.300.400.500.600.700.800.901.00
A
650 650 650 650 650 650 650 650 — —
A
500 500 500 500 500 500 500 500 — —
A
825 825 825 825 825 825 825 825 — —
A
725 725 725 725 725 725 725 725 — —
A
800 800 800 800 800 800 800 800 800 800
A
750 750 750 750 750 750 750 750 750 750
A
1,100 1,100 1,100 1,100 1,100 1,100 1,100 1,100 1,100 1,100
A
950 950 950 950 950 950 950 950 950 950
A
1,300 1,300 1,300 1,300 1,300 1,300 1,300 1,300 1,300 1,300
A
1,100 1,100 1,100 1,100 1,100 1,100 1,100 1,100 1,100 1,100
A
1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600
A
1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400
A
1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600
A
1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400 1,400
A
2,000 2,000 2,000 2,000 2,000 2,000 2,000 2,000 2,000 2,000
A
1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800
A
1,850 1,850 1,850 1,850 1,850 1,850 1,850 1,850 1,850 1,850
A
1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600 1,600
A
2,350 2,350 2,350 2,350 2,350 2,350 2,350 2,350 2,350 2,350
A
2,100 2,100 2,100 2,100 2,100 2,100 2,100 2,100 2,100 2,100
LEGEND
— — Operation Not Recommended
PRE-START-UP
System Checkout —
and before energizing the unit, the following system checks should be made prior to initial start-up:
1. Verify that the supply voltage to the heat pump is in a ccordance with the nameplate ratings.
2. Make sure that all electrical connections are tight and secure.
3. Check the electrical fusing and wiring for the correct size.
IMPORTANT: Ensure cabinet and electrical box are properly grounded.
4. Verify that the low voltage wiring between the thermostat and the unit is correct.
5. Verify that the water piping is complete and correct.
6. Check that the water flow is correct, and adjust if necessary.
7. Check the blower for free rotation, and that it is secured to the shaft.
8. Verify that vibration isolation has been provided.
9. Unit is serviceable. Be certain that all access panels are secured in place.
10. Always check incoming line voltage power supply and secondary control voltage for adequacy. Transformer pri­maries are dual tapped for 208 and 230 volts. Connect the
After completing the installation,
AIRFLOW (Cfm)
External Static Pressure (in. wg)
appropriate tap to ensure a minimum of 18 volts second­ary control voltage. 24 volts is ideal for best operation.
11. Long length thermostat and control wiring leads may cre­ate voltage drop. Increase wire gauge or up-size trans­formers may be required to ensure minimum secondary voltage supply.
12. The following guidelines are recommended for wiring between a thermostat and the unit: 18 gage up to 60 ft, 16 gage up to 100 ft and 14 gage up to 140 ft.
13. Do not apply additional controlled devices to the control circuit power supply without consulting the factory. Do­ing so may void equipment warranties.
14. Check with all code authorities on requirements involv­ing condensate disposal/over flow protection criteria.
AIR COIL — To obtain maximum performance, clean the air coil before starting the unit. A 10% solution of dishwasher detergent and water is recommended for both sides of the coil. Rinse thoroughly with water.
24
Page 25
START-UP
Use the procedure outlined below to initiate proper unit
start-up. NOTE: This equipment is designed for indoor installation
only. Set the thermostat to the highest setting.
Operating Limits
ENVIRONMENT — This equipment is designed for indoor installation only. Extreme variations in temperature, humidity and corrosive water or air will adversely affect the unit perfor­mance, reliability and service life.
POWER SUPPLY — A voltage variation of ± 10% of name­plate utilization voltage is acceptable.
UNIT STARTING CONDITIONS — Units start and operate in an ambient temperature of 45 F with entering-air tempera­ture at 50 F, entering-water temperature at 60 F and with both air and water at the flow rates used.
NOTE: These operating limits are not normal or continuous operating conditions. Assume that such a start-up is for the purpose of bringing the building space up to occupancy tem­perature. See Table 9 for operating limits.
WARNING
When the disconnect switch is closed, high voltage is pres­ent in some areas of the electrical panel. Exercise caution when working with the energized equipment. Failure to heed this warning may result in personal injury.
1. Restore power to system.
2. Turn thermostat fan position to ON. Blower should start.
3. Balance airflow at registers.
4. Adjust all valves to the full open position and turn on the line power to all heat pump units.
5. Operate unit in the cooling cycle. Refer to Table 9 for unit operating limits.
NOTE: Three factors determine the operating limits of a unit: (1) entering air temperature, (2) water temperature and (3) ambient temperature. Whenever any of these factors are at a minimum or maximum level, the other two factors must be at a normal level to ensure proper unit operation.
Table 9 — Operating Limits
AIR LIMITS
Minimum Ambient Air Temperature F 50 50 Maximum Ambient Air Temperature F 100 100 Minimum Evaporator Entering Air db/wb F 68/57 68/57 Rated Air Coil Entering Air db/wb F 80/67 80/67 Maximum Evaporator Entering Air db/wb F 95/85 98/85 Minimum Water Coil Entering Fluid
Temperature F Water Loop Typical Coil Entering Fluid
Range Temperature F Maximum Water Coil Entering Fluid
Temperature F
Minimum Ambient Air Temperature F 50 40 Maximum Ambient Air Temperature F 100 85 Minimum Evaporator Entering Air db F 50 50 Rated Air Coil Entering Air F 68 68 Maximum Evaporator Entering Air db F 80 80 Normal Water Coil Entering Fluid Range F 50-80 25-80* Minimum Water Coil Entering Fluid F 50 20*
LEGEND
db — Dry Bulb wb — Wet Bulb
*Antifreeze solution is required at these fluid temperatures.
COOLING
HEATING
STANDARD
UNIT
50 50
70/90 70/90
110 110
EXTENDED
RANGE
OPTION
Scroll Compressor Rotation — It is important to be
certain the compressor is rotating in the proper direction. To determine whether or not the compressor is rotating in the proper direction:
1. Connect service gages to suction and discharge pressure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
1. Turn off power to the unit. Install disconnect tag.
2. Reverse any two of the unit power leads.
3. Reapply power to the unit and verify pressures are correct.
The suction and discharge pressure levels should now move
to their normal start-up levels.
When the compressor is rotating in the wrong direction, the
unit makes more noise and does not provide cooling.
After a few minutes of reverse operation, the scroll com­pressor internal overload protection will open, thus activating the unit lockout. This requires a manual reset. To reset, turn the thermostat on and then off.
NOTE: There is a 5-minute time delay before the compressor will start.
Unit Start-Up Cooling Mode
1. Adjust the unit thermostat to the warmest position. Slowly reduce the thermostat position until the compres­sor activates.
2. Check for cool air delivery at unit grille a few minutes after the unit has begun to operate.
3. Verify that the compressor is on and that the water flow rate is correct by measuring pressure drop through the heat exchanger using P/T plugs. See Table 10. Check the elevation and cleanliness of the condensate lines; any dripping could be a sign of a blocked line. Be sure the condensate trap includes a water seal.
4. Check the temperature of both supply and discharge water. If temperature is within range, proceed. If tempera­ture is outside the range, check the cooling refrigerant pressures. Contact Carrier Commercial Services or prod­uct management for acceptable temperature ranges.
5. Check air temperature drop across the coil when com­pressor is operating. Air temperature drop should be between 15 and 25 F.
Table 10 — Water Temperature Change
through Heat Exchanger
WATER FLOW RATE (GPM)
For Closed Loop: Ground Source or Cooling/Boiler Systems at 3 gpm/ton
For Open Loop: Ground Water Systems at
1.5 gpm/ton
COOLING
RISE (F)
Min Max Min Max
91248
20 26 10 17
HEATING DROP (F)
Unit Start-Up Heating Mode
NOTE: Operate the unit in heating cycle after checking the cooling cycle. Allow 5 minutes between tests for the pressure or reversing valve to equalize.
1. Turn thermostat to lowest setting and set thermostat switch to HEAT position.
2. Slowly turn the thermostat to a higher temperature until the compressor activates.
3. Check for warm air delivery at the unit grille within a few minutes after the unit has begun to operate.
4. Check the temperature of both supply and discharge water. If temperature is within range, proceed. If tempera­ture is outside the range, check the heating refrigerant
25
Page 26
pressures. Contact Carrier Commercial Services or prod­uct management for acceptable temperature ranges.
5. Once the unit has begun to run, check for warm air deliv­ery at the unit grille.
6. Check air temperature rise across the coil when compres­sor is operating. Air temperature rise should be between 20 and 30 F after 15 minutes at load.
7. Check for vibration, noise and water leaks.
Flow Regulation — Flow regulation can be accom-
plished by two methods. Most water control valves have a flow adjustment built into the valve. By measuring the pressure drop through the unit heat exchanger, the flow rate can be deter­mined. See Table 11. Adjust the water control valve until the flow of 1.5 to 2 gpm is achieved. Since the pressure constantly varies, two pressure gages may be needed in some applications.
Table 11 — Coaxial Water Pressure Drop
UNIT 50PTH, PTV GPM
4.0 1.5 1.3 1.1 1.0
024
036
048
060,070
6.0 3.1 2.6 2.3 2.1
7.0 4.1 3.4 3.0 2.7
8.0 5.1 4.3 3.8 3.4
4.0 1.2 1.0 0.8 0.6
6.0 2.6 2.5 2.3 2.1
8.0 4.5 4.2 4.0 3.7
9.0 5.7 5.2 4.8 4.4
5.5 1.1 0.9 0.8 0.7
8.3 2.2 2.1 2.0 1.8
11.0 3.9 3.6 3.2 3.1
12.0 4.5 4.2 3.8 3.5
7.0 0.5 0.3 0.2 0.1
10.5 1.9 1.8 1.7 1.6
14.0 3.9 3.5 3.2 2.9
15.0 4.8 4.3 3.9 3.5
WATER TEMPERATURE (F)
30 F 50 F 70 F 90 F
Pressure Drop (psi)
An alternative method is to install a flow control device. These devices are typically an orifice of plastic material de­signed to allow a specified flow rate that are mounted on the outlet of the water control valve. Occasionally these valves produce a velocity noise that can be reduced by applying some back pressure. To accomplish this, slightly close the leaving isolation valve of the well water setup.
WARNING
4. Shutting off the return valve that connects into the flush cart reservoir will allow 50 psig surges to help purge air pockets. This maintains the pump at 50 psig.
5. To purge, keep the pump at 50 psig until maximum pumping pressure is reached.
6. Open the return valve to send a pressure surge through the loop to purge any air pockets in the piping system.
7. A noticeable drop in fluid level will be seen in the flush cart tank. This is the only indication of air in the loop.
NOTE: If air is purged from the system while using a 10 in. PVC flush tank, the level drop will only be 1 to 2 in. since liquids are incompressible. If the level drops more than this, flushing should continue since air is still being compressed in the loop. If level is less than 1 to 2 in., reverse the flow.
8. Repeat this procedure until all air is purged.
9. Restore power.
Antifreeze may be added before, during, or after the flush­ing process. However, depending on when it is added in the process, it can be wasted. Refer to the Antifreeze section for more detail.
Loop static pressure will fluctuate with the seasons. Pres­sures will be higher in the winter months than during the warm­er months. This fluctuation is normal and should be considered when charging the system initially. Run the unit in either heating or cooling for several minutes to condition the loop to a homogenous temperature.
When complete, perform a final flush and pressurize the loop to a static pressure of 40 to 50 psig for winter months or 15 to 20 psig for summer months.
After pressurization, be sure to remove the plug from the end of the loop pump motor(s) to allow trapped air to be discharged and to ensure the motor housing has been flooded. Be sure the loop flow center provides adequate flow through the unit by checking pressure drop across the heat exchanger. Compare the results to the data in Table 11.
Antifreeze — In areas where entering loop temperatures
drop below 40 F or where piping will be routed through areas subject to freezing, antifreeze is needed.
Alcohols and glycols are commonly used as antifreeze agents. Freeze protection should be maintained to 15 F below the lowest expected entering loop temperature. For example, if the lowest expected entering loop temperature is 30 F, the leaving loop temperature would be 22 to 25 F. Therefore, the freeze protection should be at 15 F (30 F – 15 F = 15 F).
To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position before flushing system.
Flushing — Once the piping is complete, units require final
purging and loop charging. A flush cart pump of at least 1.5 hp is needed to achieve adequate flow velocity in the loop to purge air and dirt particles from the loop. Flush the loop in both direc­tions with a high volume of water at a high velocity. Follow the steps below to properly flush the loop:
1. Verify power is off.
2. Fill loop with water from hose through flush cart before using flush cart pump to ensure an even fill. Do not allow the water level in the flush cart tank to drop below the pump inlet line in order to prevent air from filling the line.
3. Maintain a fluid level in the tank above the return tee in order to avoid air entering back into the fluid.
IMPORTANT: All alcohols should be pre-mixed and pumped from a reservoir outside of the building or introduced under water level to prevent fuming.
Calculate the total volume of fluid in the piping system. See Table 12. Use the percentage by volume in Table 13 to deter­mine the amount of antifreeze to use. Antifreeze concentration should be checked from a well-mixed sample using a hydrom­eter to measure specific gravity.
FREEZE PROTECTION SELECTION — The 30 F FP1 factory setting (water) should be used to avoid freeze damage to the unit.
Once antifreeze is selected, the JW3 jumper (FP1) should be clipped on the control to select the low temperature (anti­freeze 13 F) set point to avoid nuisance faults.
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Table 12 — Approximate Fluid Volume (gal.)
per 100 Ft of Pipe
PIPE DIAMETER (in.) VOLUME (gal.)
Copper 14.1
Rubber Hose 13.9 Polyethylene
LEGEND
IPS — Internal Pipe Size SCH — Schedule SDR — Standard Dimensional Ratio
NOTE: Volume of heat exchanger is approximately 1.0 gallon.
1.25 6.4
1.5 9.2
3
/4 IPS SDR11 2.8 1 IPS SDR11 4.5 11/4 IPS SDR11 8.0
1
/2 IPS SDR11 10.9 2 IPS SDR11 18.0
1
1
/4 IPS SCH40 8.3 11/2 IPS SCH40 10.9 2 IPS SCH40 17.0
Table 13 — Antifreeze Percentages by Volume
MINIMUM TEMPERATURE FOR
ANTIFREEZE
Methanol (%) 25 21 16 10 100% USP Food Grade
Propylene Glycol (%) Ethenol 29 25 20 14
FREEZE PROTECTION (F)
10 15 20 25
38 30 22 15
Cooling Tower/Boiler Systems — These systems
typically use a common loop temperature maintained at 60 to 95 F. Carrier recommends using a closed circuit evaporative cooling tower with a secondary heat exchanger between the tower and the water loop. If an open type cooling tower is used continuously, chemical treatment and filtering will be necessary.
Ground Coupled, Closed Loop and Plateframe Heat Exchanger Well Systems —
low water temperatures from 30 to 110 F. The external loop field is divided up into 2 in. polyethylene supply and return lines. Each line has valves connected in such a way that upon system start-up, each line can be isolated for flushing using only the system pumps. Locate air separation in the piping sys­tem prior to the fluid reentering the loop field.
These systems al-
OPERATION
Power Up Mode —
inputs, terminals and safety controls are checked for normal operation.
NOTE: The compressor will have a 5-minute anti-short cycle upon power up.
The unit will not operate until all the
Units with Aquazone™ Complete C Control
STANDBY — Y and W terminals are not active in Standby mode, however the O and G terminals may be active, depend­ing on the application. The compressor will be off.
COOLING — Y and O terminals are active in Cooling mode. After power up, the first call to the compressor will initiate a 270 to 300 second random start delay and a 5-minute anti-short cycle protection time delay. After both delays are complete, the compressor is energized.
NOTE: On all subsequent compressor calls the random start delay is omitted.
HEATING STAGE 1 — Terminal Y is active in heating stage 1. After power up, the first call to the compressor will initiate a 270 to 300 second random start delay and a 5-min­ute anti-short cycle protection time delay. After both delays are complete, the compressor is energized.
NOTE: On all subsequent compressor calls the random start delay is omitted.
HEATING STAGE 2 — To enter Stage 2 mode (units equipped with 2 step compressor or with two compressors on­ly), terminal Y2 is active (Y is already active). Also, the G ter­minal must be active or the W terminal is disregarded. The compressor relay will remain on and EH1 is immediately turned on. EH2 will turn on after 10 minutes of continual stage 2 demand.
LOCKOUT MODE — The status LED will flash fast in Lockout mode and the compressor relay will be turned off immediately. Lockout mode can be “soft” reset via the Y input or can be reset via the disconnect depending on the DIP switch settings. The last fault causing the lockout is stored in memory and can be viewed by entering test mode.
LOCKOUT WITH EMERGENCY HEAT — While in Lock­out mode, if W becomes active, then Emergency Heat mode will occur.
EMERGENCY HEAT — In Emergency Heat mode, terminal W is active while terminal Y is not. Terminal G must be active in the 50PT units the fan will be run if W is energized. EH1 is immediately turned on. EH2 will turn on.
Units with Aquazone Deluxe D Control
STANDBY/FAN ONLY — The compressor will be off. The Fan Enable, Fan Speed, and reversing valve (RV) relays will be on if inputs are present.
NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1 and Fan 2 outputs.
HEATING STAGE 1 — In Heating Stage 1 mode, the Fan Enable and Compressor relays are turned on immediately. Once the demand is removed, the relays are turned off and the control reverts to Standby mode.
EMERGENCY HEAT — In Emergency Heat mode, the Fan Enable and Fan Speed relays are turned on. The EH1 output is turned on immediately.
COOLING STAGE 2 — In Cooling Stage 2 mode, the Fan Enable, compressor and RV relays remain on. The Fan Speed relay is turned on immediately and turned off immediately once the Cooling Stage 2 demand is removed. The control reverts to Cooling Stage 1 when the thermostat removes all Y2 call.
Units with Hot Gas Reheat Option
FAN ONLY — A (G) call from the thermostat to the (G) ter­minal of the Deluxe D control board will bring the unit on in fan only mode.
COOLING STAGE 1 — A simultaneous call from (G), (Y1), and (O) to the (G), (Y1) will bring the unit on in Cooling Stage
1. COOLING STAGE 2 — A simultaneous call from (G), (Y1),
(Y2), and (O) to the (G) will bring the unit on in Cooling Stage
2. When the call is satisfied at the thermostat the unit will con­tinue to run in Cooling Stage 1 until the Cooling Stage 1 call is removed or satisfied, shutting down the unit. NOTE: Not all units have two-stage cooling functionality.
HEATING STAGE 1 — A simultaneous call from (G) and (Y1) to the (G) and (Y1) terminals will bring the unit on in Heating Stage 1.
HEATING STAGE 2 — A simultaneous call from (G), (Y1), and (Y2) will bring the unit on in Heating Stage 2. When the call is satisfied at the thermostat the unit will continue to run in Heating Stage 1 until the call is removed or satisfied, shutting down the unit. NOTE: Not all units have two-stage heating functionality.
REHEAT MODE — A call from the humidistat/dehumidistat to the (H) terminal will bring the unit on in Reheat mode if there is no call for cooling at the thermostat. When the humidi­stat/dehumidistat call is removed or satisfied the unit will shut down.
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NOTE: Cooling always overrides Reheat mode. In the Cooling mode, the unit cools and dehumidifies. If the cooling thermo­stat is satisfied but there is still a call for dehumidification, the unit will continue to operate in Reheat mode.
COMPLETE C AND DELUXE D BOARD
SYSTEM TEST
Test mode provides the ability to check the control opera­tion in a timely manner. The control enters a 20-minute test mode by momentarily shorting the test terminals. All time de­lays are sped up 15 times. The follow operations are common to both Complete C and Deluxe D controls.
Retry Mode — In Retry mode, the staus LED will flash
the code for the corresponding fault. If the fault clears and ther thermostat call (Y) is still present the Complete C or Deluxe D controller will run the compressor once the ASC (anti-short cy­cle) timer has expired and will try to satisfy the call. If the call is satisfied the unit will resume its normal operation.
If 2 or 4 consecutive faults occur (depending on the DIP switch setting) within 1 hour, the controller will lock the com­pressor operation out and will flash the alarm code on the status LED as well as alarm dry contact output. When the Complete C or Deluxe D controller enters lockout mode the alarm will also be shown on the panel mounted LED.
LED Fault Indication — Two LED indicators are pro-
vided. The GREEN power LED indicates 18-30 VAC present at the board.
The RED LED is a fault indicator with blink codes as follows:
• One Blink = High pressure lockout
• Two Blinks = Low pressure lockout
• Three Blinks = Freeze sensor lockout
• Four Blinks = Condensate overflow
• Five Blinks = Brownout
Board Default Settings — The board will come from
the factory with the following default settings:
• Freeze — “Terminals not jumped” on all the time
• Temp — 30 F
• Lockout — 2
• Reset — Y
•Alarm — PULSE
•Test — NO
• Dry Contact — Normally Open (NO)
SERVICE
Perform the procedures outlined below periodically, as indicated. An annual “checkup” is recommended by a licensed refrigeration mechanic. Recording the performance measure­ments of volts, amps, and water temperature differences (both heating and cooling) is recommended. This data should be compared to the information on the unit’s data plate and the data taken at the original start-up of the equipment.
Periodic lockouts almost always are caused by air or water flow problems. The lockout (shutdown) of the unit is a normal protective measure in the design of the equipment. If continual lockouts occur call a mechanic immediately and have them check for: water flow problems, water temperature problems, airflow problems or air temperature problems. Use of the pres­sure and temperature charts for the unit may be required to properly determine the cause.
WARNING
To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect switch before ser­vicing unit.
IMPORTANT: When a compressor is removed from this unit, system refrigerant circuit oil will remain in the com­pressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.
IMPORTANT: All refrigerant discharged from this unit must be recovered without exception. Technicians must fol­low industry accepted guidelines and all local, state and fed­eral statutes for the recovery and disposal of refrigerants.
IMPORTANT: To avoid the release of refrigerant into the atmosphere, the refrigerant circuit of this unit must only be serviced by technicians who meet local, state and federal proficiency requirements.
Filters — Filter changes or cleanings are required at regular
intervals. The time period between filter changes will depend upon type of environment the equipment is used in. In a single family home, that is not under construction, changing or clean­ing the filter every 60 days may be sufficient. In other applica­tions such as motels, where daily vacuuming produces a large amount of lint, filter changes may be need to be as frequent as biweekly. See Fig. 1-3 for replacement filter sizes. Note that horizontal units containing two filters are taped together at the factory to facilitate removal. This should be done by end user as new filters are installed..
IMPORTANT: Units should never be operated without a filter.
Water Coil — Keep all air out of the water coil. Check
open loop systems to be sure the well head is not allowing air to infiltrate the water line. Always keep lines airtight.
Inspect heat exchangers regularly, and clean more frequent­ly if the unit is located in a “dirty” environment. Keep the heat exchanger full of water at all times. Open loop systems should have an inverted P trap placed in the discharge line to keep water in the heat exchanger during off cycles. Closed loop systems must have a minimum of 15 psig during the summer and 40 psig during the winter.
Check P trap frequently for proper operation.
CAUTION
To avoid fouled machinery and extensive unit clean-up, DO NOT operate units without filters in place. DO NOT use equipment as a temporary heat source during construction.
Condensate Drain Pans — The condensate drain
should be checked annually by cleaning and flushing to ensure proper drainage.
Refrigerant System — Verify air and water flow rates
are at proper levels before servicing. To maintain sealed circuit­ry integrity, do not install service gages unless unit operation appears abnormal.
Check to see that unit is within acceptable superheat and subcooling temperature range. If the unit is not within these ranges, recover and reweigh in refrigerant charge.
Compressor — Conduct annual amperage checks to en-
sure that amp draw is no more than 10% greater than indicated on the serial plate data.
Fan Motors — All units have lubricated fan motors. Fan
motors should never be lubricated unless obvious, dry operation is suspected. Periodic maintenance oiling is NOT recommended as it will result in dirt accumulating in the excess
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oil and cause eventual motor failure. Conduct annual dry oper-
Fig. 22 — Gravity Flow Method
FILL CONDENSER WITH CLEANING SOLUTION. DO NOT ADD SOLUTION MORE RAPIDLY THAN VENT CAN EXHAUST GASES CAUSED BY CHEMICAL ACTION.
PAIL
FUNNEL
CONDENSER
PAIL
3’ TO 4’
VENT PIPE
5’ APPROX
1” PIPE
SUCTION
PUMP SUPPORT
TANK
FINE MESH SCREEN
RETURN
GAS VENT
PUMP
PRIMING CONN.
GLOBE VALV ES
SUPPLY
1” PIPE
CONDENSER
REMOVE WATER REGULATING VALVE
ation check and amperage check to ensure amp draw is no more than 10% greater than indicated on serial plate data.
Condensate Drain Cleaning — Clean the drain line
and unit drain pan at the start of each cooling season. Check flow by pouring water into drain. Be sure trap is filled to main­tain an air seal.
Air Coil Cleaning — Remove dirt and debris from evap-
orator coil as required by condition of the coil. Clean coil with a stiff brush, vacuum cleaner, or compressed air. Use a fin comb of the correct tooth spacing when straightening mashed or bent coil fins.
Condenser Cleaning — Water-cooled condensers may
require cleaning of scale (water deposits) due to improperly maintained closed-loop water systems. Sludge build-up may need to be cleaned in an open water tower system due to induced contaminants.
Local water conditions may cause excessive fouling or pitting of tubes. Condenser tubes should therefore be cleaned at least once a year, or more often if the water is contaminated.
Proper water treatment can minimize tube fouling and pitting. If such conditions are anticipated, water treatment analysis is recommended. Refer to the Carrier System Design Manual, Part 5, for general water conditioning information.
CAUTION
Follow all safety codes. Wear safety glasses and rubber gloves when using inhibited hydrochloric acid solution. Observe and follow acid manufacturer’s instructions.
Clean condensers with an inhibited hydrochloric acid solu­tion. The acid can stain hands and clothing, damage concrete, and, without inhibitor, damage steel. Cover surroundings to guard against splashing. Vapors from vent pipe are not harmful, but take care to prevent liquid from being carried over by the gases.
Warm solution acts faster, but cold solution is just as effec­tive if applied for a longer period.
GRAVITY FLOW METHOD — Do not add solution faster than vent can exhaust the generated gases.
When condenser is full, allow solution to remain overnight, then drain condenser and flush with clean water. Follow acid manufacturer’s instructions. See Fig. 22.
FORCED CIRCULATION METHOD — Fully open vent pipe when filling condenser. The vent may be closed when condenser is full and pump is operating. See Fig. 23.
Regulate flow to condenser with a supply line valve. If pump is a nonoverloading type, the valve may be fully closed while pump is running.
For average scale deposit, allow solution to remain in con­denser overnight. For heavy scale deposit, allow 24 hours. Drain condenser and flush with clean water. Follow acid manu­facturer’s instructions.
Fig. 23 — Forced Circulation Method
Checking System Charge — Units are shipped with
full operating charge. If recharging is necessary:
1. Insert thermometer bulb in insulating rubber sleeve on liquid line near filter drier. Use a digital thermometer for all temperature measurements. DO NOT use a mercury or dial-type thermometer.
2. Connect pressure gage to discharge line near compressor.
3. After unit conditions have stabilized, read head pressure on discharge line gage.
NOTE: Operate unit a minimum of 15 minutes before checking charge.
4. From standard field-supplied Pressure-Temperature chart for R-410A refrigerant, find equivalent saturated con­densing temperature.
5. Read liquid line temperature on thermometer; then subtract from saturated condensing temperature. The dif­ference equals subcooling temperature.
6. Compare the subcooling temperature with the normal temperature. If the measured liquid line temperature does not agree with the required liquid line temperature, ADD refrigerant to raise the temperature or REMOVE refriger­ant (using standard practices) to lower the temperature (allow a tolerance of ± 3° F).
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Refrigerant Charging
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0
Temperature (degF)
Resistance (kOhm)
WARNING
To prevent personal injury, wear safety glasses and gloves when handling refrigerant. Do not overcharge system — this can cause compressor flooding.
NOTE: Do not vent or depressurize unit refrigerant to atmo­sphere. Remove and recover refrigerant following accepted practices.
Air Coil Fan Motor Removal
CAUTION
Before attempting to remove fan motors or motor mounts, place a piece of plywood over evaporator coils to prevent coil damage.
Disconnect motor power wires from motor terminals before
motor is removed from unit.
1. Shut off unit main power supply.
2. Loosen bolts on mounting bracket so that fan belt can be removed.
3. Loosen and remove the 2 motor mounting bracket bolts on left side of bracket.
Slide motor/bracket assembly to extreme right and lift out through space between fan scroll and side frame. Rest motor on a high platform such as a step ladder. Do not allow motor to hang by its power wires.
TROUBLESHOOTING
When troubleshooting problems with a WSHP, consider the following:
Thermistor — A thermistor may be required for single-
phase units where starting the unit is a problem due to low voltage. See Fig. 24 for thermistor nominal resistance.
Control Sensors — The control system employs 2 nom-
inal 10,000 ohm thermistors (FP1 and FP2) that are used for freeze protection. Be sure FP1 is located in the discharge fluid and FP2 is located in the air discharge. See Fig. 25.
Thermostatic Expansion Valves — Thermostat-
ic expansion valves (TXV) are used as a means of metering the refrigerant through the evaporator to achieve a preset superheat at the TXV sensing bulb. Correct superheat of the refrigerant is important for the most efficient operation of the unit and for the life of the compressor.
Packaged heat pumps typically use one bi-flow TXV to me­ter refrigerant in both modes of operation. When diagnosing possible TXV problems it may be helpful to reverse the refrig­erant flow to assist with the diagnosis.
Geothermal and water source heat pumps are designed to operate through a wide range of entering-water temperatures that will have a direct effect on the unit refrigerant oper­ating pressures. Therefore, diagnosing TXV problems can be difficult.
TXV FAILURE — The most common failure mode of a TXV is when the valve fails while closed. Typically, a TXV uses spring pressure to close the valve and an opposing pressure, usually from a diaphragm, to open the valve. The amount of pressure exerted by the diaphragm will vary, depending on the pressure inside of the sensing bulb. As the temperature of and pressure within the bulb decreases, the valve will modulate closed and restrict the refrigerant flow through the valve. The result is less refrigerant in the evaporator and an increase in the superheat. As the temperature at the bulb increases the dia­phragm pressure will increase, which opens the valve and allows more refrigerant flow and a reduction in the superheat.
If the sensing bulb, connecting capillary, or diaphragm assembly are damaged, pressure is lost and the spring will force the valve to a closed position. Often, the TXV will not close completely so some refrigerant flow will remain, even if inade­quate flow for the heat pump to operate.
The TXV sensing bulb must be properly located, secured, and insulated as it will attempt to control the temperature of the line to which it is connected. The sensing bulb must be located on a dedicated suction line close to the compressor. On a pack­aged heat pump, the bulb may be located almost any place on the tube running from the compressor suction inlet to the reversing valve. If the bulb is located on a horizontal section, it should be placed in the 10:00 or 2:00 position for optimal performance.
CAUTION
Use caution when tightening the strap. The strap must be tight enough to hold the bulb securely but caution must be taken not to over-tighten the strap, which could dent, bend, collapse or otherwise damage the bulb.
Fig. 24 — Thermistor Nominal Resistance
The bulb must be secured to the pipe using a copper strap. The use of heat transfer paste between the bulb and the pipe will also help ensure optimum performance.
The bulb must also be properly insulated to eliminate any influence on valve operation by the surrounding conditions. Cork tape is the recommended insulation as it can be molded tight to the bulb to prevent air infiltration.
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Causes of TXV Failure
SUCTION
COMPRESSOR
DISCHARGE
COAX
EXPANSION
VALV E
FP2
FP1
LIQUID LINE
WATER IN
WATER OUT
CONDENSATE
OVERFLOW
(CO)
AIR COIL FREEZE PROTECTION
WATER COIL PROTECTION
THERMISTOR
(°F)
(°F)
AIR
COIL
AIRFLOW
AIRFLOW
LEGEND
Fig. 25 — FP1 and FP2 Thermistor Location
COAX — Coaxial Heat Exchanger
Airflow Refrigerant Liquid Line Flow
— The most common causes of TXV
failure are:
1. A cracked, broken, or damaged sensing bulb or capillary can be caused by excessive vibration of the capillary dur­ing shipping or unit operation.
If the sensing bulb is damaged or if the capillary is cracked or broken, the valve will be considered failed and must be replaced. Replacement of the TXV “power head” or sensing bulb, capillary, diaphragm assembly is possi­ble on some TXVs. The power head assembly screws onto most valves, but not all are intended to be replace­able. If the assembly is not replaceable, replace the entire valve.
2. Particulate debris within the system can be caused by sev­eral sources including contaminated components, tubing, and service tools, or improper techniques used during brazing operations and component replacement.
Problems associated with particulate debris can be com­pounded by refrigerant systems that use POE (polyol es­ter oil). POE oil has solvent-like properties that will clean the interior surfaces of tubing and components. Particu­lates can be released from interior surfaces and may mi­grate to the TXV strainer, which can lead to plugging of the strainer.
3. Corrosive debris within the system may happen after a failure, such as a compressor burn out, if system was not properly cleaned.
4. Noncondensables may be present in the system. Non­condensables includes any substance other than the refrigerant or oil such as air, nitrogen, or water. Contami­nation can be the result of improper service techniques, use of contaminated components, and/or improper evacu­ation of the system.
Symptoms and will include one or more of the following:
• Low refrigerant suction pressure
• High refrigerant superheat
• High refrigerant subcooling
• TXV and/or low pressure tubing frosting
• Equalizer line condensing and at a lower temperature than the suction line or the equalizer line frosting
• FP1 faults in the heating mode in combination with any of the symptoms listed above
— The symptoms of a failed TXV can be varied
• FP2 faults in the cooling mode in combination with any of the symptoms listed above. Some symptoms can mimic a failed TXV but may actually be caused be another problem.
Before conducting an analysis for a failed TXV the follow-
ing must be verified:
• Confirm that there is proper water flow and water tem­perature in the heating mode.
• Confirm that there is proper airflow and temperature in the cooling mode.
• Ensure coaxial water coil is clean on the inside; this applies to the heating mode and may require a scale check.
• Refrigerant may be undercharged. To verify, subcooling and superheat calculations may be required.
Diagnostics
— Several tests may be required to determine if a TXV has failed. The following tools may be required for testing:
1. Refrigerant gage manifold compatible with the refriger­ant in the system.
2. Digital thermometer, preferably insulated, with wire leads that can be connected directly to the tubing.
3. Refrigerant pressure-temperature chart for the refrigerant used.
To determine that a TXV has failed, verify the following:
• The suction pressure is low and the valve is non-respon­sive. The TXV sensing bulb can be removed from the suction line and warmed by holding the bulb in your hand. This action should result in an increase in the suc­tion pressure while the compressor is operating. The sensing bulb can also be chilled by immersion in ice water, which should result in a decrease in the suction pressure while the compressor is operating. No change in the suction pressure would indicate a nonresponsive valve.
• Simultaneous LOW suction pressure, HIGH refrigerant subcooling and HIGH superheat.
• LOW suction pressure, LOW subcooling and HIGH superheat may indicate an undercharge of refrigerant. HIGH subcooling and LOW superheat may indicate an overcharge of refrigerant. The suction pressure will usu­ally be normal or high if there is an overcharge of refrig­erant.
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• LOW suction pressure and frosting of the valve and/or equalizer line may indicate a failed valve. However, these symptoms may also indicate an undercharge of refrigerant. Calculate the subcooling and superheat to verify a failed valve or refrigerant charge issue.
Repair
WARNING
Puron® refrigerant (R-410A) operates at higher pressure than R-22, which is found in other WSHPs. Tools such as manifold gages must be rated to withstand the higher pres­sures. Failure to use approved tools may result in a failure of tools, which can lead to severe damage to the unit, injury or death.
IMPORTANT: Due to the hygroscopic nature of the POE oil in Puron refrigerant (R-410A) and other envi­ronmentally sound refrigerants, any component replace­ment must be conducted in a timely manner using caution and proper service procedure for these types of refrigerants. A complete installation instruction will be included with each replacement TXV/filter drier assem­bly. It is of critical importance these instructions are carefully understood and followed. Failure to follow these instructions can result in a system that is contami­nated with moisture to the extent that several filter drier replacements may be required to properly dry the system.
WARNING
Most TXVs are designed for a fixed superheat setting and are therefore considered non-adjustable. Removal of the bottom cap will not provide access for adjustment and can lead to damage to the valve or equipment, unintended vent­ing of refrigerant, personal injury, or possibly death.
CAUTION
Always recover the refrigerant from the system with suit­able approved tools, recovery equipment, and practices prior to attempting to remove or repair any TXV.
CAUTION
Use caution when tightening the strap. The strap must be tight enough to hold the bulb securely but caution must be taken not to over-tighten the strap, which could dent, bend, collapse or otherwise damage the bulb.
CAUTION
Puron® refrigerant (R-410A) requires the use of synthetic lubricant (POE oil). Do not use common tools on systems that contain R-22 refrigerants or mineral oil. Contamina­tion and failure of this equipment may result.
IMPORTANT: Repair of any sealed refrigerant system requires training in the use of refrigeration tools and proce­dures. Repair should only be attempted by a qualified ser­vice technician. A universal refrigerant handling certificate will be required. Local and/or state license or certificate may also be required.
See Table 14 for suggestions of good practices regarding regular repairs. See Table 15 for additional troubleshooting information.
CAUTION
Disconnect power from unit before removing or replacing connectors, or servicing motor. Wait 5 minutes after dis­connecting power before opening motor.
Moisture Check — To perform moisture check:
• Check that connectors are orientated “down” (or as rec-
ommended by equipment manufacturer).
• Arrange harnesses with “drip loop” under motor.
• Check if condensate drain is plugged.
• Check for low airflow (too much latent capacity).
• Check for undercharged condition.
• Check and plug leaks in return ducts, cabinet.
DO DO NOT
Check motor, controls wiring, and connections thoroughly before replac­ing motor.
Orient connectors down so water cannot get in. Install “drip loops.” Locate connectors above 7 and 4 o’clock positions. Use authorized motor and control model numbers for replacement. Replace one motor or control model number with another (unless
Keep static pressure to a minimum by:
• Using high efficiency, low-static filters.
• Keeping filters clean.
• Designing ductwork for minimum static and maximum comfort.
• Improving ductwork when replacement is necessary. Size equipment wisely. Oversize system then compensate with low airflow. Check orientation before inserting motor connectors. Plug in power connector backwards.
Table 14 — Good Practices
Automatically assume the motor is bad.
replacement is authorized). Use high pressure drop filters.
Use restricted returns.
Force plugs.
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Table 15 — Troubleshooting
FAULT POSSIBLE CAUSE SOLUTION
Entire unit does not run Power Supply Off Apply power, close disconnect.
Blown Fuse Replace fuse or reset circuit breaker. Check for correct fuses. Voltage Supply Low If voltage is below minimum voltage specified on unit data plate, contact local power com-
Thermostat Set the fan to ON, the fan should run. Set thermostat to COOL and lowest temperature set-
Blower operates but compressor does not
Unit off on high pressure control Discharge pressure too high In “COOLING” mode: Lack of or inadequate water flow. Entering water temperature is too
Unit off on low pressure control Suction pressure too low In “COOLING” mode: Lack of or inadequate airflow. Entering air temperature is too cold.
Unit short cycles Unit oversized Recalculate heating and or cooling loads.
Insufficient cooling or heating Unit undersized Recalculate heating and or cooling loads. If excessive, possibly adding insulation and shad-
Thermostat Check setting, calibration, and wiring. Wiring Check for loose or broken wires at compressor, capacitor, or contactor. Safety Controls Check Complete C board red default LED for blink code. Compressor overload open If the compressor is cool and the overload will not reset, replace compressor. Compressor motor grounded Internal winding grounded to the compressor shell. Replace compressor. Compressor windings open After compressor has cooled, check continuity of the compressor windings. If the windings
Refrigerant charge The unit is overcharged with refrigerant. Recover refrigerant, evacuate and recharge with fac-
High pressure Check for defective or improperly calibrated high pressure switch.
Refrigerant charge The unit is low on refrigerant. Check for refrigerant leak, repair, evacuate and recharge with
Low pressure switch Check for defective or improperly calibrated low pressure switch.
Thermostat Thermostat installed near a supply air grille; relocate thermostat. Readjust heat anticipator. Wiring and controls Check for defective or improperly calibrated low pressure switch.
Loss of conditioned air by leakage Check for leaks in ductwork or introduction of ambient air through doors or windows. Airflow Lack of adequate airflow or improper distribution of air. Replace dirty filter. Refrigerant charge Low on refrigerant charge causing inefficient operation. Compressor Check for defective compressor. If discharge is too low and suction pressure is too high, com-
Reversing Valve Defective reversing valve creating bypass of refrigerant from discharge of suction side of
Operating pressures Compare unit operation pressures to the pressure/temperature chart for the unit. TXV Check TXV for possible restriction or defect. Replace if necessary. Moisture, noncondensables The refrigerant system may be contaminated with moisture or noncondensables. Recover
pany.
ting, the unit should run in the cooling mode (reversing valve energized). Set unit to HEAT and the highest temperature setting, the unit should run in the heating mode (reversing valve deenergized). If neither the blower or compressor run in all three cases, the thermostat could be miswired or faulty. To ensure miswired or faulty thermostat verify that 24 volts is available at the low volt­age terminal strip between “R” and “C”, “Y” and “C”, and “O” and “C”. If the blower does not operate, verify 24 volts between terminals “G” and “C”. Replace the thermostat if defective.
are open, replace the compressor.
warm. Scaled or plugged condenser. In “HEATING” mode: Lack of or inadequate airflow. Blower inoperative, clogged filter or restrictions in ductwork
tor recommended charge.
Blower inoperative, clogged filter or restrictions in ductwork In “HEATING” mode: Lack of or inadequate water flow. Entering water temperature is too cold. Scaled or plugged condenser.
factory recommended charge.
ing will rectify the problem.
pressor is not pumping properly. Replace compressor.
compressor. Replace reversing valve.
refrigerant, replace filter dryer, evacuate the refrigerant system, and recharge with factory recommended charge.
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© Carrier Corporation 2014
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500104-01 Printed in U.S.A. Form 50PT-5SI Pg 34 1218 6-14 Replaces: NEW
8733953040
Page 35
50PTH,PTV
START-UP CHECKLIST
CUSTOMER:___________________________ JOB NAME: _______________________________________
MODEL NO.:___________________________ SERIAL NO.: _____________ DATE: _________________
I. PRE-START-UP
DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)
HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS TIGHT? (Y/N)
HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER? (Y/N)
HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)
HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)
IS AN AIR FILTER INSTALLED? (Y/N)
II. START-UP
IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)
IF 3-PHASE SCROLL COMPRESSOR IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS. (Y/N)
UNIT VOLTAGE — COOLING OPERATION
PHASE AB VOLTS PHASE BC VOLTS PHASE CA VOLTS
(if 3 phase) (if 3 phase)
PHASE AB AMPS
PHASE BC AMPS PHASE CA AMPS
(if 3 phase) (if 3 phase)
CONTROL VOLTAGE
IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N) . IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.
TEMPERATURES
FILL IN THE ANALYSIS CHART ATTACHED.
COAXIAL HEAT EXCHANGER
COOLING CYCLE: FLUID IN
FFLUID OUT F PSI FLOW
HEATING CYCLE: FLUID IN
FFLUID OUT F PSI FLOW
AIR COIL COOLING CYCLE:
AIR IN
HEATING CYCLE: AIR IN
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500104-01 Printed in U.S.A. Form 50PT-5SI Pg CL-1 6-14 Replaces: NEW
FAIR OUT F
FAIR OUT F
Page 36
HEATING CYCLE ANALYSIS
SUCTION
COMPRESSOR
DISCHARGE
COAX
EXPANSION
VALVE
°F
°F
AIR
COIL
°F
PSI
FLUID OUT
FLUID IN
°F
PSI
°F
LIQUID LINE
PSI
°F
SAT
CONTACT CARRIER COMMERCIAL SERVICES OR PRODUCT MANAGEMENT FOR ACCEPTABLE PRESSURE DROP TO DETERMINE FLOW RATE
COOLING CYCLE ANALYSIS
AIR
COIL
°F
HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =
FLOW RATE (GPM) x TEMP. DIFF. (DEG. F) x FLUID FACTOR* =
°F
EXPANSION
VALVE
LIQUID LINE
COAX
°F
FLUID IN
°F
PSI
FLUID OUT
°F
PSI
CONTACT CARRIER COMMERCIAL SERVICES OR PRODUCT MANAGEMENT FOR ACCEPTABLE PRESSURE DROP TO DETERMINE FLOW RATE
(Btu/hr)
PSI
°F
SUCTION
COMPRESSOR
DISCHARGE
SAT
CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE
SUPERHEAT = SUCTION TEMPERATURE – SUCTION SATURATION TEMPERATURE
=
(DEG F)
SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE
(DEG F)
=
*Use 500 for water, 485 for antifreeze.
© Carrier Corporation 2014
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500104-01 Printed in U.S.A. Form 50PT-5SI Pg CL-2 1218 6-14 Replaces: NEW
8733953040
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