Carrier 50PSW036-360 User Manual

Water-to-Water Water Source Heat Pump

with PURON

Refrigerant (R-410A)

Installation, Start-Up, and

Service Instructions

AQUAZONE™

50PSW036-360

50 Hz

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

• STORAGE

•PROTECTION

•INSPECT UNIT

Step 3 — Locate Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Step 4 — Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Step 5 — Connect Piping. . . . . . . . . . . . . . . . . . . . . . . . . 5

• WATER SUPPLY AND QUALITY

• WATER LOOP APPLICATIONS

• GROUND-WATER APPLICATIONS

• GROUND-LOOP APPLICATIONS

• UNIT LOAD PIPING

Step 6 — Wire Electrical Connections. . . . . . . . . . . . 7

• POWER CONNECTION

• SUPPLY VOLTAGE

• EXTERNAL LOOP POWER CONNECTION

• 220-V OPERATION

• 380-V OPERATION

Step 7 — Wire Low Voltage Connections . . . . . . . . 12

• THERMOSTAT CONNECTIONS

• WATER FREEZE PROTECTION

• ACCESSORY CONNECTIONS

• WATER SOLENOID VALVES

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . .13,14

Complete C Control Jumper Settings. . . . . . . . . . . 13

Complete C Control DIP Switches. . . . . . . . . . . . . . 13

Deluxe D Control Jumper Settings . . . . . . . . . . . . . 13

Deluxe D Control DIP Switches . . . . . . . . . . . . . . . . 13

Deluxe D Control Accessory Relay

Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-16

Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 14

Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Cleaning and Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 16

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 16

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Units with Aquazone Complete C Control . . . . . . . 16

Units with Aquazone Deluxe D Control . . . . . . . . . . 16

SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16,17

Page

Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Aquazone Deluxe D Control LED Indicators . . . . . 17

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18,19

Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 19

Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 19-21

50PSW START-UP CHECKLIST . . . . . . . . . . . CL-1,CL-2

IMPORTANT: Read the entire instruction manual before starting installation.

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 function of cleaning coils. 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 your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching 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, U.S.A.) 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.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53500073-01 Printed in U.S.A. Form 50PSW-C1SI Pg 1 10-10 Replaces: New

Recognize safety information. This is the safety alert symbol ( ). When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.

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. Install lockout tag.

GENERAL

The Aquazone™ 50PSW water source heat pump (WSHP) is a single-package vertically mounted unit 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.

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.

These units are not approved for outdoor installation and must be installed indoors in the structure being conditioned. Do not locate in areas where ambient conditions are not maintained within 4.4 to 37.8 C.

Installation, operation and

CAUTION

To avoid equipment damage, do not use these units as a source of heating or cooling during the construction process. The mechanical components used in these units can 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.

1. Verify unit is correct model for entering water temperature of job.

2. Be sure the location chosen for unit installation provides ambient temperatures maintained above freezing. Well water applications are especially susceptible to freezing.

3. Be sure the installation location is isolated from sleeping areas, private offices and other acoustically sensitive spaces.

NOTE: A sound control accessory package may be used to help eliminate sound in sensitive spaces.

4. Provide sufficient access to allow maintenance and servicing of the compressor and coils.

5. Provide an unobstructed path to the unit within the closet or mechanical room. Space should be sufficient to allow removal of unit if necessary.

6. Provide ready access to water valves and fittings, and screwdriver access to unit side panels.

7. 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 jobsite, it should be left in its shipping carton and stored in a clean, dry area of the building or in a warehouse. Units must be stored in an upright position at all times. If carton stacking is necessary, stack units a maximum of 3 cartons high. Do not remove any equipment from its shipping package until it is needed for installation.

Table 1 — 50PSW Unit Physical Data

50PSW UNIT SIZE 036 060 120 180 360 NOMINAL CAPACITY (kW) 10.5 17.6 35.2 49.2 105.5 WEIGHT (kg)

Operating 158 163 329 358 604

Packag ed 169 175 349 363 608 COMPRESSOR (qty) Scroll (1) Scroll (1) Scroll (2) Scroll (1) Scroll (2) REFRIGERANT TYPE R-410A

Factory Charge Per Circuit (kg) 2.04 2.83 2.83 6.80 6.80 CONNECTIONS, FPT (in.)

Commercial Load/Source

HWG Water In/Out WATER VOL UM E ( L) 3.64 5.04 10.02 13.27 25.44

LEGEND NOTES:

HWG — Hot Water Generator

1. Maximum working pressure on the base unit is 3445 kPa.

2. Units have a dual isolated compressor mounting.

3. Units have a balanced port expansion valve (TXV).

4. Insulated source and load water coils are standard.

5. Insulated refrigerant circuit is standard.

6. Compressor is on (green) light and fault on (red) light.

N/A

Fig. 1 — 50PSW036-120 Unit

SIZES 036,060

LEGEND

NOTES:

1. Dimensions shown in centimeters unless noted otherwise.

2. HACR circuit breaker in U.S.A. only.

50PSW

UNIT SIZE

OVERALL CABINET

(mm)

WATER CONNECTIONS (mm)

ELECTRIC ACCESS PLUGS

(mm)

1234 5 6

Source (Outdoor) Load (Indoor) HWG

DepthBWidthCHeightDWater InEWate r OutFWater InGWater OutHReturn InJWater Out

Low

Volt ag e

External

Pump

Power

Supply

036,060 778 645 838 69 239 493 622 709 772 531 582 785

120 778 1344 940 640 640 765 765 886 886 759 810 874

HWG — Hot Water Generator HACR —

Heating, Air Conditioning, and Refrigeration

SIZE 120

4.6 cm

2.5 cm

Optional

Service Access

2.5 cm

Req

Service

uire

Access

18.5 cm

4.3 cm

3.3 cm

6.9 cm

Optional

Service Access

Required

Access

Service

31.338.1 11.4

10.8

Power Supply Wiring

34.9 x 50.8 mm Double Knockout

10.8

Control Wiring

28.6 x 34.9 mm Double Knockout

11.4

2”FPT Water Connections

38.1

13.8

53.3

Fault/Run Lights

163.8

Left Side View

Front

View

To p

View

Load

Source

Side

Refrig. Circuit

Access

Panel

Front

Compressor

Access

Panel

Electrical

Access

Panel

Header

Access

Panel

To p

Minimum91cm

Required Service

Access

114.6

66.9

Optional (Single Unit)

91cm Additional

Service Access

Fig. 2 — 50PSW180,360 Unit

LEGEND FPT — Female Pipe Thread

NOTES:

1. Dimensions shown in centimeters unless noted otherwise.

2. For multiple units placed side by side, allow 1.2 m minimum front access for service and maintenance.

PROTECTION — Once the units are properly positioned on the jobsite, they must be covered with either a shipping carton, vinyl film, or an equivalent protective covering. Open ends of pipes stored on the jobsite must be capped. This precaution is especially important in areas where painting, plastering, or spraying of fireproof material, etc., is not yet complete. Foreign material that is allowed to accumulate 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.

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.

INSPECT UNIT — To prepare the unit for installation, complete the procedures listed below:

1. Compare the electrical data on the unit nameplate with ordering and shipping information to verify that the correct unit has been shipped.

2. Verify that the unit is the correct model for the entering water temperature of the job.

3. Wait to remove the packaging until the unit is ready for installation.

4. Verify that the refrigerant tubing is free of kinks or dents, and that it does not touch other unit components.

5. Inspect all electrical connections. Be sure connections are clean and tight at the terminals.

6. Loosen bolts and remove shipping clamps on compressors equipped with external spring vibration isolators. Compressors are internally spring-mounted.

7. Locate and verify any accessory kit located in compressor section.

Fig. 3 — Typical Water Loop System —

Boiler, Tower, or Ground (Sizes 180,360 Shown)

Control

Wiring

Power

Disconnect

Source Connections

(Boiler/Tower/Ground)

Load Connections (Hot

Water/Chilled Water)

Automatic Flow

Regulator

Ball Valve with Pressure Temperature Port

Y Strainer with Blow Down Valve

a50-8138

8. Remove any access panel screws that may be difficult to remove once unit is installed.

Step 3 — Locate Unit — The following guidelines

should be considered when choosing a location for the WSHP:

• Units are for indoor use only.

• Provide sufficient space for water and electrical connections.

• Locate unit in an area that allows for easy access and removal of access panels.

• Allow enough space for service personnel to perform maintenance.

Step 4 — Mount Unit — Mount unit as shown in Fig. 3.

Rod attachments must be able to support the weight of the unit. See Table 1 for unit operating weight.

Step 5 — Connect Piping — Depending on the appli-

cation, there are 3 types of WSHP piping systems to choose from: water loop, ground-water and ground loop. Refer to the Carrier System Design Manual for additional information.

All WSHP units utilize 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. When making piping connections, consider the following:

• A backup wrench must be used when making screw connections to unit to prevent internal damage to piping.

• Insulation may be required on piping to avoid condensation 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 galvanic corrosion.

• Units may be manifolded together via top water connects to get increased temperatures, when piped in series, or greater capacity, when piped in parallel.

WATER SUPPLY AND QUALITY — 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 that 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.

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 2.9 L/m and 3.9 L/m per kW of cooling capacity. For proper maintenance and servicing, pressure-temperature (P/T) ports are necessary for temperature and flow verification.

In addition to complying with any applicable codes, consider the following for system piping:

• Piping systems utilizing water temperatures below

10.0 C require 13 mm closed cell insulation on all piping

surfaces to eliminate condensation.

• All plastic to metal threaded fittings should be avoided

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.

• The piping system should be flushed prior to operation to

remove dirt and foreign materials from the system.

Cooling tower/boiler systems typially use a common loop maintained between 16 and 32 C. The use of a closed circuit evaporative cooling tower with a secondary heat exchanger 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.

GROUND-WATER APPLICATIONS — 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.

• Boiler drains and other valves should be connected using

a “T” connector 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. GROUND-LOOP APPLICATIONS — Temperatures be-

tween –3.9 and 43.3 C and a cooling capacity of 2.9 L/m and

3.9 L/m per kW are recommended. In addition to complying with any applicable codes, consider the following for system piping:

• Piping materials should be limited to only polyethylene

fusion in the buried sections of the loop.

• Galvanized or steel fittings should not be used at any

time due to corrosion.

• All plastic to metal threaded fittings should be avoided

e to the potential to leak. Use a flange fitted substitute.

• Do not overtighten connections.

• Route piping to avoid service access areas to unit.

• Pressure-temperature (P/T) plugs should be used to mea-

sure flow of pressure drop.

*Teflon is a trademark of E. I. du Pont de Nemours and Company.

Table 2 — Water Quality Guidelines

CONDITION

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 Consid-

NR — Application Not Recommended SS — Stainless Steel

*Heat exchanger materials considered are copper, cupronickel,

†Closed recirculating system is identified by a closed pressurized

**Recirculating open wells should observe the open recirculating

Iron Fe (Bacterial Iron Potential) All N/A

Iron Fouling

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

304 SS (stainless steel), 316 SS, titanium.

piping system.

design considerations.

(Ferrous)

LEGEND

ering Recirculating Potable Water

MATERIAL*

All N/A pH < 7.5 and Ca Hardness, <100 ppm

All N/A

All

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

CLOSED

RECIRCULATING†

Monitor/treat as needed.

<10 ppm of particles and

6 - 8.5

a maximum velocity of

6 fps.

Filtered for maximum

800 micron size.

OPEN LOOP AND RECIRCULATING WELL**

If >7.5 minimize steel pipe use.

Based upon 150 F HWG and direct well, 85 F indirect well HX.

If Fe

Minimize steel pipe below 7 and no open tanks with pH <8.

At H2S>0.2 ppm, avoid use of copper and cupronickel piping of 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.

††If the concentration of these corrosives exceeds the maximum

allowable level, then the potential for serious corrosion problems exists. Sulfides in the water quickly oxidize when exposed to air, requir- ing 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 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 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.

(ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for

Above this level deposition will occur.

Rotten egg smell appears at 0.5 ppm level.

6.0 - 7.5

–0.5 to +0.5

<0.2 ppm (Ferrous)

iron bacteria.

<0.5 ppm of Oxygen

6 - 8.5

<0.5 ppm

UNIT LOAD PIPING — For applications with wide temperature variation such as heating/cooling coils:

• Use piping materials that are rated for the maximum temperature and pressure combination. This excludes PVC for most heating applications.

• Ensure load water flow in high temperature heating applications is at least 3.2 L/m per kW to improve performance and reduce nuisance high pressure faults.

• DO NOT employ plastic to metal threaded joints.

• Utilize a pressure tank and air separator vent system to equalize pressure and remove air.

• Employ an 800-micron particulate strainer in both load and source plumbing to protect the plate heat exchanger.

Swimming Pool Hot Tub Applications

— Load heat exchanger should be isolated with secondary heat exchanger constructed of anti-corrosion material in all chlorine/bromine fluid applications.

Potable Water Applications

• Load coax material should always be vented double

walled for use in potable water systems.

• Ensure load water flow in high temperature heating

applications is at least 3.2 L/m per kW to improve performance and reduce nuisance high pressure faults.

Step 6 — Wire Electrical Connections

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. Install lockout tag.

CAUTION

Use only copper conductors for field-installed electrical wiring. Unit terminals are not designed to accept other types of conductors. Failure to heed this warning could result in equipment damage.

All field-installed wiring, including the electrical ground, MUST comply with the National Electrical Code (NEC) as well as applicable local codes. In addition, all field wiring must conform to the Class II temperature limitations described in the NEC.

Operating voltage must be the same voltage and phase as shown in Table 3.

Refer to unit wiring diagrams Fig. 4-8 for a schematic of the field connections which must be made by the installing (or electrical) contractor.

Consult the unit wiring diagram located on the inside of the compressor access panel to ensure proper electrical hookup. The installing (or electrical) contractor must make the field connections when using field-supplied disconnect.

Make all final electrical connections with a length of flexible conduit to minimize vibration and sound transmission to the building.

POWER CONNECTION — Line voltage connection is made by connecting incoming line voltage wires to L1, L2, and L3 on the power distribution block.

SUPPLY VOLTAGE — Operating voltage to unit must be within voltage range indicated on unit nameplate.

Voltages between phases must be balanced within 2%. Use the following formula to determine the percentage voltage imbalance:

% Voltage Imbalance

= 100 x

max voltage deviation from average voltage

average voltage

Example: Supply voltage is 380-3-50.

AB = 372 volts BC = 376 volts AC = 384 volts

Average Voltage =

372 + 376 + 384

1132

= 377

Determine maximum deviation from average voltage: (AB) 372 – 377 = 5 v

(BC) 376 – 377 = 1 v (AC) 384 – 377 = 7 v

Maximum deviation is 7 v. Determine percent voltage imbalance.

% Voltage Imbalance = 100 x

377

= 1.86%

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

Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components.

NOTE: If more than 2% voltage imbalance is present, contact local electric utility.

Table 3 — 50PSW Electrical Data

50PSW UNIT

SIZE

036

060

120

180

360

FLA — Full Load Amps HACR — Heating, Air Conditioning, and Refrigeration LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Minimum Overcurrent Protection RLA — Rated Load Amps

*Time-delay fuse or HACR circuit breaker.

VOLTAGE

(V-Ph-Hz)

220/240-1-50 198/264 13.5 67 1 13.5 16.9 30 380/420-3-50 342/462 5.4 38 1 5.4 6.8 15 220/240-1-50 198/264 24.5 153 1 24.5 30.6 50 380/420-3-50 342/462 9.6 74 1 9.6 12.0 20 220/240-1-50 198/264 24.5 153 2 49.0 55.1 80 380/420-3-50 342/462 9.6 74 2 19.2 21.6 30 220/240-1-50 198/264 44.9 273 1 44.9 56.1 100 380/420-3-50 342/462 18.6 118 1 18.6 23.3 40 220/240-1-50 198/264 44.9 273 2 89.8 101.0 125 380/420-3-50 342/462 18.6 118 2 37.2 46.6 60

LEGEND

VOLTAGE RANGE

MIN/MAX

COMPRESSOR

RLA LRA QTY

TOTAL

FLA

MCA MOCP*

Solenoid Coil

Thermistor

Ground

Indicator Light

G=Green, R=Red

(Comp On) (Alarm Light)

Circuit Breaker

High Pressure Switch

Low Pressure Switch

Fuse

a50-8621

Fig. 4 — Typical Aquazone™ 50PSW036-060 Complete C Control Wiring, Single-Phase

RVS — Reversing Valve Solenoid

TRANS — Transformer

Factory Line Voltage Wiring

Factory Low Voltage Wiring

Field Line Voltage Wiring

Field Low Voltage Wiring

Printed Circuit Trace

Relay/Contactor Coil

NOTES:

1. Compressor motor thermally protected internally.

2. All wiring to the unit must comply with NEC and local codes.

3. Transformer is wired to 265 v lead (BRN) for 265-1-50 units. For 220/240 v

operation, disconnect BRN lead at L1 and connect ORG lead to L1. Insulate

open ends of BRN and RED leads. Transformer is energy limiting or may have

circuit breaker.

4. FP1 thermistor provides freeze protection for source water. When using anti-

freeze solutions, cut JW3 jumper.

5. Refer to or Thermostat Installation, Application and Operation Manual for con-

trol wiring to the unit. Low voltage wiring must be “Class 1” and voltage rating

equal to or greater than unit supply voltage.

AL — Alarm Relay Contacts

CC — Compressor Contactor

FP1 — Sensor, Source Low Temp Protection

FP2 — Sensor, Load Low Temp Protection

HP — High Pressure Switch

JW1 — Jumper Wire for Alarm

LED — Light-Emitting Diode

LOC — Loss of Charge Pressure Switch

NEC — National Electrical Code

P1 — Field Wiring Terminal Block

Complete C

+ 16 hidden pages