Carrier AQUAZONE 50RHC Installation And Service Instructions Manual Download

Page: 1 / 44

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

Catalog No. 04-53500007-01

Printed in U.S.A.

Form 50R-5SI

Pg 1

6-07

Replaces: 50R-4SI

Book 1

Tab

5a 5a

Installation, Start-Up, and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . .1,2

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Step 1 — Check Jobsite

. . . . . . . . . . . . . . . . . . . . . . . . 2

Step 2 — Check Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . 2

• STORAGE

• PROTECTION

• INSPECT UNIT

Step 3 — Unit Location

. . . . . . . . . . . . . . . . . . . . . . . . . . 14

• FIELD CONVERSION OF DISCHARGE AIR

Step 4 — Mounting the Unit

. . . . . . . . . . . . . . . . . . . . . 15

• HORIZONTAL UNITS

• VERTICAL UNITS

Step 5 — Duct System

. . . . . . . . . . . . . . . . . . . . . . . . . . 15

• SOUND ATTENUATION

• EXISTING DUCT SYSTEM

Step 6 — Condensate Drain

. . . . . . . . . . . . . . . . . . . . . 16

• HORIZONTAL UNITS

• VERTICAL UNITS

• VENTING

Step 7 — Piping Connections

. . . . . . . . . . . . . . . . . . . 16

• WATER LOOP APPLICATIONS

• GROUND-WATER APPLICATIONS

• GROUND-LOOP APPLICATIONS

Step 8 — Field Power Supply Wiring

. . . . . . . . . . . . 18

• POWER CONNECTION

• SUPPLY VOLTAGE

• 208-VOLT OPERATION

Step 9 — Field Control Wiring

. . . . . . . . . . . . . . . . . . . 18

• THERMOSTAT CONNECTIONS

• WATER FREEZE PROTECTION

• AIR COIL FREEZE PROTECTION

• ACCESSORY CONNECTIONS

• WATER SOLENOID VALVES

PRE-START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-30

System Checkout

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

PSC Blower Speed Selection

. . . . . . . . . . . . . . . . . . 27

FIELD SELECTABLE INPUTS

. . . . . . . . . . . . . . . 30-32

C Control Jumper Settings

. . . . . . . . . . . . . . . . . . . . 30

C Control DIP Switches

. . . . . . . . . . . . . . . . . . . . . . . 30

D Control Jumper Settings

. . . . . . . . . . . . . . . . . . . . 30

D Control DIP Switches

. . . . . . . . . . . . . . . . . . . . . . . 30

Units with Modulating Hot Water Reheat

(HWR) Option

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

D Control Accessory Relay Configurations

. . . . . 32

Water Valve (Slow Opening)

. . . . . . . . . . . . . . . . . . . 32

Outside Air Damper (OAD)

. . . . . . . . . . . . . . . . . . . . 32

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-36

Operating Limits

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Scroll Compressor Rotation

. . . . . . . . . . . . . . . . . . . . . 33

Unit Start-Up Cooling Mode

. . . . . . . . . . . . . . . . . . . . . 33

Unit Start-Up Heating Mode

. . . . . . . . . . . . . . . . . . . . . 34

Flow Regulation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Page

Flushing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Antifreeze

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Cooling Tower/Boiler Systems

. . . . . . . . . . . . . . . . . . 36

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems

. . . . . . . . . . . . . . . . 36

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36,37

Power Up Mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Units with Aquazone Complete C Control

. . . . . . . 36

Units with Aquazone Deluxe D Control

. . . . . . . . . . 36

Units with HWR Option

. . . . . . . . . . . . . . . . . . . . . . . . . . 37

SYSTEM TEST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37,38

Test Mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Retry Mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Aquazone Deluxe D Control LED Indicators

. . . . . 38

SERVICE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-40

Filters

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Water Coil

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Condensate Drain Pans

. . . . . . . . . . . . . . . . . . . . . . . . . 38

Refrigerant System

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Compressor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Fan Motors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Condensate Drain Cleaning

. . . . . . . . . . . . . . . . . . . 39

Air Coil Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Condenser Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . 39

Checking System Charge

. . . . . . . . . . . . . . . . . . . . . 39

Refrigerant Charging

. . . . . . . . . . . . . . . . . . . . . . . . . 40

Air Coil Fan Motor Removal

. . . . . . . . . . . . . . . . . . . . . 40

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . 40-42

Thermistor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Control Sensors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

50RHC,RVC,RHR,RHS,RVR,RVS,RDS
START-UP CHECKLIST

. . . . . . . . . . . . . . . . . . CL-1, CL-2

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should

install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func-

tions of cleaning coils and filters and replacing filters. All other

operations should be performed by trained service personnel.

When working on air-conditioning equipment, observe precau-

tions in the literature, tags and labels attached to the unit, and

other safety precautions that may apply.

Improper installation, adjustment, alteration, service, mainte-

nance, or use can cause explosion, fire, electrical shock or other

conditions which may cause personal injury or property dam-

age. Consult a qualified installer, service agency, or your distrib-

utor or branch for information or assistance. The qualified in-

staller or agency must use factory-authorized kits or accessories

when modifying this product. Refer to the individual instruc-

tions packaged with the kits or accessories when installing.

IMPORTANT: Read the entire instruction manual before

starting installation.

AQUAZONE™

50RHC,RVC,RHR,RHS,

RVR,RVS,RDS006-060

Water Source Heat Pump Units

Summary of Contents for AQUAZONE 50RHC

Page 1: ...ems 36 OPERATION 36 37 Power Up Mode 36 Units with Aquazone Complete C Control 36 Units with Aquazone Deluxe D Control 36 Units with HWR Option 37 SYSTEM TEST 37 38 Test Mode 37 Retry Mode 37 Aquazone Deluxe D Control LED Indicators 38 SERVICE 38 40 Filters 38 Water Coil 38 Condensate Drain Pans 38 Refrigerant System 38 Compressor 39 Fan Motors 39 Condensate Drain Cleaning 39 Air Coil Cleaning 39 ...

Page 2: ...w installation 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 car ton 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 unloa...

Page 3: ...o 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 Do not 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...

Page 4: ...8 Fin Spacing FPI 12 12 12 12 12 12 Number of Rows 2 2 3 2 3 3 Filter Standard 1 in Throwaway 10 x 18 10 x 18 10 x 18 1 16 x 25 1 16 x 25 1 16 x 25 Weight lb Operating 103 105 114 181 189 197 Packaged 113 115 124 186 194 202 UNIT 50RHC RVC 036 041 042 048 060 COMPRESSOR 1 each Reciprocating Scroll FACTORY REFRIGERANT CHARGE R 22 VERTICAL oz 42 50 51 66 74 FACTORY REFRIGERANT CHARGE R 22 HORIZONTAL...

Page 5: ...3 8 3 8 Fin Spacing FPI 12 12 12 12 10 Number of Rows 2 2 3 3 3 3 4 Filter Standard 1 in Throwaway 1 10 x 20 1 16 x 20 1 18 x 24 2 18 x 18 1 12 x 20 1 25 x 20 Weight lb Operating 110 112 121 147 169 193 219 229 257 267 323 Packaged 120 122 131 157 179 203 231 241 269 279 338 FPI Fins per Inch PSC Permanent Split Capacitor UNIT 50RHS RVS RDS 015 018 024 030 036 042 048 060 070 COMPRESSOR 1 each Rot...

Page 6: ... 1 43 1 17 1 15 3 2 4 1 9 2 1 12 1 9 1 6 1 2 6 13 3 9 9 4 1 1 3 23 0 15 0 1 1 1 0 cm 51 1 109 5 43 4 38 9 6 1 4 9 5 3 30 8 23 2 15 6 6 6 33 8 25 1 10 5 3 3 58 4 38 1 2 8 2 5 036 042 in 20 1 47 1 21 1 18 8 2 2 4 7 1 2 16 1 13 1 10 1 2 5 16 1 11 0 3 0 2 5 25 9 19 0 1 1 1 0 cm 51 1 119 6 53 6 47 6 5 5 11 9 3 0 41 0 33 3 25 7 6 3 40 9 27 9 7 7 6 4 65 8 48 3 2 8 2 5 048 in 24 1 54 1 21 1 19 4 5 9 4 3 2...

Page 7: ...ould be removed for return duct connection 3 Hanger kit is factory installed Isolation grommets are provided 4 Right and left orientation is determined by looking at water connection side 50RHR UNITS OVERALL CABINET WATER CONNECTIONS ELECTRICAL KNOCKOUTS in DISCHARGE CONNECTION Duct Flange Installed 0 10 in RETURN CONNECTION Using Return Air Opening 1 2 3 Loop Water FPT in G 1 2 conduit H 1 2 cond...

Page 8: ... 3 4 1 2 5 7 9 7 12 2 5 0 6 8 10 4 9 3 5 0 2 1 28 1 17 3 2 2 1 0 cm 56 8 158 0 49 0 6 1 13 7 1 5 14 5 24 6 31 0 12 7 17 3 26 4 23 6 12 7 5 3 71 4 43 9 5 6 2 5 036 in 22 4 62 2 19 3 2 4 5 4 0 6 3 4 1 2 5 7 9 7 12 2 5 0 6 8 10 4 9 3 5 0 2 1 32 1 17 3 2 2 1 0 cm 56 8 158 0 49 0 6 1 13 7 1 5 14 5 24 6 31 0 12 7 17 3 26 4 23 6 12 7 5 3 81 5 43 9 5 6 2 5 042 048 in 25 4 71 2 21 3 2 4 5 4 0 6 1 1 2 8 1 1...

Page 9: ...9 Fig 4 Typical Installation 50RHC RHR RHS Units UNIT HANGER ISOLATION DETAIL ...

Page 10: ...1 5 39 0 1 8 3 8 15 2 3 6 8 1 2 3 3 4 4 1 7 1 10 1 6 4 3 8 14 0 14 0 5 3 2 3 18 3 20 2 0 7 cm 54 6 54 6 99 1 4 5 9 7 38 6 9 1 20 6 5 8 1 9 10 5 18 1 25 7 16 1 9 5 35 6 35 6 13 6 5 8 46 5 51 3 1 9 036 042 in 21 5 26 0 44 0 2 0 3 7 16 2 2 6 10 4 2 3 3 4 4 1 7 1 10 1 6 4 3 8 14 0 14 0 5 1 2 3 22 8 24 2 0 7 cm 54 6 66 0 111 8 5 1 9 4 41 1 6 6 28 4 5 8 1 9 10 5 18 1 25 7 16 1 9 5 35 6 35 6 13 1 5 8 57 ...

Page 11: ...6 in 22 4 25 6 40 6 2 4 5 4 9 7 3 4 5 7 9 7 12 2 7 2 5 8 14 0 14 0 4 3 2 2 21 1 19 2 1 0 cm 56 8 65 1 103 1 6 1 13 7 24 6 14 5 24 6 31 0 18 3 14 7 35 6 35 6 10 9 5 6 53 6 48 8 2 5 042 048 in 22 4 25 6 48 6 2 4 5 4 9 7 1 5 7 9 7 12 2 7 2 5 8 14 0 14 0 4 3 2 2 21 1 27 2 1 0 cm 56 8 65 1 123 4 6 1 13 7 24 6 14 5 24 6 31 0 18 3 14 7 35 6 35 6 10 9 5 6 53 6 69 1 2 5 060 in 25 4 30 6 50 6 2 4 5 4 10 7 1...

Page 12: ... 1 2 5 042 048 in 25 4 30 6 50 6 2 4 5 4 10 7 1 1 2 8 1 11 7 14 2 6 2 6 3 18 0 18 0 5 1 2 2 26 1 27 2 1 0 cm 64 5 77 8 128 5 6 1 13 7 27 2 20 6 29 7 36 1 15 7 16 0 45 7 45 7 13 0 5 6 66 3 69 1 2 5 060 in 25 4 30 6 54 6 2 4 5 4 10 7 1 1 2 8 1 11 7 14 2 6 2 6 3 18 0 18 0 5 1 2 2 26 1 31 2 1 0 cm 64 5 77 8 138 7 6 1 13 7 27 2 20 6 29 7 36 1 15 7 16 0 45 7 45 7 13 0 5 6 66 3 79 2 2 5 070 in 25 4 30 6 ...

Page 13: ...26 4 23 5 27 9 5 6 53 6 71 6 51 8 042 048 in 25 4 30 6 54 6 18 9 15 9 5 4 2 4 3 5 1 1 2 13 1 9 7 7 2 7 2 8 7 13 6 13 3 10 5 2 2 26 1 28 2 22 4 cm 64 5 77 8 138 7 48 0 40 4 13 7 6 1 8 9 33 3 24 6 18 3 18 3 22 1 34 4 33 7 26 7 5 6 66 3 71 6 56 9 060 in 25 4 30 6 58 6 18 9 15 9 5 4 2 4 3 5 1 1 2 13 1 9 7 7 2 7 2 8 7 13 6 13 3 10 5 2 2 26 1 32 2 22 4 cm 64 5 77 8 148 8 48 0 40 4 13 7 6 1 8 9 33 3 24 6...

Page 14: ...iring 4 Check blower wire routing and connections for undo tension or contact with sheet metal edges Re route if necessary 5 Check refrigerant tubing for contact with other compo nents Adjust if necessary 6 Reinstall top panel using screws set aside in Step 1 NOTE Location for some screws at bottom of discharge panel may have to be changed 7 Manually spin fan wheel to check for obstructions Adjust...

Page 15: ...uld be included in the supply and return air ducts provided system performance is not adversely impacted The blower speed can also be changed in the field to reduce air noise or excessive air flow provided system performance is not adversely impacted EXISTING DUCT SYSTEM If the unit is connected to existing ductwork consider the following Verify that the existing ducts have the proper capacity to ...

Page 16: ...a 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 galvanic corrosion WATER LOOP APPLICATIONS Water loop applications usually include a number of units plumbed to a common pip i...

Page 17: ...uire 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 sys tem 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 b...

Page 18: ...l Step 9 Field Control Wiring THERMOSTAT CONNECTIONS The thermostat should be wired directly to the Aquazone control board See Fig 19 22 and 24 WATER FREEZE PROTECTION The Aquazone control allows the field selection of source fluid freeze protection points through jumpers The factory setting of jumper JW3 FP1 is set for water at 30 F In earth loop applications jumper JW3 should be clipped to chang...

Page 19: ...r to thermostat installation instructions for wiring to the unit Thermostat wiring must be Class 1 and voltage rating equal to or greater than unit supply voltage Fig 19 Typical Aquazone Complete C Control Wiring LEGEND LOC Loss of Charge Pressure Switch MV Motorized Valve NEC National Electrical Code P1 Field Wiring Terminal Block PM Performance Monitor RV Reversing Valve Coil TRANS Transformer T...

Page 20: ...tor thermally protected internally 2 All wiring to the unit must comply with NEC and local codes 3 Transformer is wired to 208 v RED lead for 208 3 60 For 230 3 60 switch RED and ORG leads at L1 and insulate RED lead 4 FP1 thermistor provides freeze protection for water When using anti freeze solutions cut JW3 jumper 5 Typical Aquazone thermostat wiring shown Refer to thermostat installa tion inst...

Page 21: ... low speed 9 For low speed remove BLK wire from BR 6 and replace with RED Connect BLK and BRN wires together 10 Optional LON wires Only connect if LON connection is desired at the wall sensor 11 For blower motors with leads For medium or low speed diconnect BLK wire from BR 6 Connect BLK and ORG PUR wire together Connect RED for low or BLU for medium to BR 6 12 Blower motor is factory wired to med...

Page 22: ...s and screws to control box Ground available from top two standoffs as shown 8 Blower motor is factory wired for medium and high speeds For any other combination of speeds at the motor attach the BLK wire to the higher of the two desired speed taps and the BLU wire to the lower of the two desired speed taps 9 Blower motor is factory wired for high and low speeds No other combination is available 1...

Page 23: ... tif NOTE Low voltage connector may be removed for easy installation Fig 24 Low Voltage Field Wiring a50 6267tf tif Fig 23 50RHC RVC RHR RVR RHS RVS RDS Typical Single Phase Line Voltage Power Connection a50 8162 TYPICAL WATER VALVE C A 24 VAC TERMINAL STRIP P2 Fig 26 Typical D Control Accessory Wiring ...

Page 24: ... 10 0 58 0 2 70 12 7 15 2 25 208 230 3 197 254 6 9 55 0 3 00 9 9 11 7 15 460 3 414 506 3 6 28 0 1 70 5 3 6 2 15 036 208 230 1 197 254 15 4 82 0 1 80 17 2 21 1 35 265 1 239 292 14 4 83 0 2 00 16 4 20 0 30 208 230 3 197 254 9 6 70 0 1 80 11 4 13 8 20 460 3 414 506 4 9 33 0 1 24 6 1 7 4 15 041 208 230 1 197 254 16 2 96 0 3 00 19 2 23 2 35 208 230 3 197 254 10 3 75 0 3 00 13 3 15 8 25 460 3 414 506 4 ...

Page 25: ... 0 85 4 1 4 9 15 030 208 230 1 197 254 11 2 60 0 1 90 13 1 15 9 25 265 1 239 292 10 3 58 0 1 66 11 9 14 5 20 208 230 3 197 254 6 4 50 0 1 90 8 3 9 9 15 460 3 414 506 3 2 25 0 1 00 4 2 5 0 15 036 208 230 1 197 254 14 1 84 0 3 00 17 1 20 6 30 265 1 239 292 13 5 83 0 2 70 16 2 19 5 30 208 230 3 197 254 8 2 63 4 3 00 11 2 13 3 20 460 3 414 506 4 1 36 0 1 70 5 8 6 8 15 042 208 230 1 197 254 16 2 96 0 3...

Page 26: ...56 0 1 58 12 5 15 2 25 0 7 13 2 15 9 25 208 230 3 197 254 7 7 55 0 1 30 9 0 10 9 15 0 8 9 8 11 7 15 460 3 414 506 3 8 27 0 0 85 4 7 5 7 15 0 7 5 4 6 4 15 030 HIGH STATIC 208 230 1 197 254 12 2 67 0 1 30 13 5 16 5 25 0 8 14 8 17 9 30 265 1 239 292 10 9 56 0 1 58 12 5 15 2 25 0 7 13 6 16 3 25 208 230 3 197 254 7 7 55 0 1 30 9 0 10 9 15 0 8 10 3 12 2 15 460 3 414 506 3 8 27 0 0 85 4 7 5 7 15 0 7 5 8 ...

Page 27: ...I 450 440 430 420 400 390 370 350 320 310 300 230 MED 410 400 390 380 360 350 340 330 310 290 270 LO 370 360 350 340 320 320 310 300 280 260 240 012 375 300 HI 470 460 450 440 430 420 400 390 380 370 350 330 290 MED 410 400 380 370 360 360 350 340 330 320 310 290 LO 340 330 320 320 310 310 300 300 290 290 015 500 375 HI 750 730 710 700 680 660 630 600 570 540 500 400 MED 660 640 620 610 590 570 55...

Page 28: ... 1000 750 HI 1160 1040 920 800 750 MED 1130 1080 1030 930 820 750 LO 1050 1040 1030 1010 990 980 960 940 910 880 840 750 036 1200 900 HI 1520 1500 1480 1460 1430 1400 1370 1350 1320 1270 1210 1110 960 840 MED 1150 1150 1140 1140 1130 1130 1120 1110 1100 1070 1040 940 LO 1010 1010 1000 1000 990 990 980 980 970 950 930 036 High Static 1200 900 HI 1530 1500 1470 1400 1290 1170 960 MED 1360 1350 1340 ...

Page 29: ...040 1020 1000 980 960 930 910 870 840 820 790 Hi Static 030 1000 HS Hi 1380 1360 1320 1280 1250 1220 1200 1150 1110 1070 1020 940 850 690 HS Med 1260 1240 1220 1190 1170 1130 1100 1070 1040 990 950 HS Low 1170 1150 1130 1100 1080 1050 1020 990 960 930 900 036 1150 Hi 1390 1360 1320 1280 1250 1220 1200 1150 1110 1070 1020 940 850 690 Med 1260 1240 1220 1190 1170 1130 1100 1070 1040 990 950 Low 1170...

Page 30: ...S1 This set of switches offers the following options for D Control configuration Performance Monitor PM Set switch 1 to enable or dis able performance monitor To enable the PM set the switch to ON To disable the PM set the switch to OFF Compressor Relay Staging Operation Switch 2 will en able or disable compressor relay staging operation The com pressor relay can be set to turn on with stage 1 or ...

Page 31: ...n H input the Deluxe D board will activate the cooling mode and engage reheat Table 16 Humidistat Dehumidistat Logic and Deluxe D DIP Switch Settings Table 17 shows the relationship between thermostat input signals and unit operation There are four operational inputs for single stage units and six operational inputs for dual stage units Fan Only Cooling Stage 1 Cooling Stage 2 Heating Stage 1 Heat...

Page 32: ...Air Damper OAD If relay is configured for OAD the relay will normally be ON any time the Fan Enable relay is energized The relay will not start for 30 minutes following a return to normal mode from NSB when NSB is no longer connected to ground C After 30 min utes the relay will start if the Fan Enable is set to ON START UP Use the procedure outlined below to initiate proper unit start up NOTE This...

Page 33: ...nternal 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 compres sor activates 2 Check for cool air delivery at uni...

Page 34: ...l 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 proc...

Page 35: ...1 2 0 1 9 1 8 9 0 3 5 3 3 3 0 2 9 042 5 3 1 4 1 3 1 2 1 2 7 9 2 9 2 7 2 5 2 3 10 5 4 6 4 2 3 9 3 7 048 6 0 2 1 1 9 1 8 1 7 9 0 3 9 3 7 3 4 3 2 12 0 6 4 5 9 5 5 5 2 060 7 5 2 9 2 7 2 5 2 4 11 3 5 7 5 3 4 9 4 7 15 0 9 4 8 7 8 1 7 7 UNIT 50RHS RVS RDS GPM WATER TEMPERATURE F 30 F 50 F 70 F 90 F Pressure Drop psi 015 1 8 0 6 0 5 0 5 0 5 2 8 1 0 0 9 0 8 0 8 3 8 1 5 1 4 1 3 1 2 018 2 2 0 7 0 7 0 6 0 6 3...

Page 36: ...diately turn on 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 If there is a master slave or dual compressor application all compressor relays and related functions will oper...

Page 37: ...ll both have the same numerical label For example flashing code 1 will have an alarm relay cycling code 1 Code 1 indicates the control has not faulted since the last power off to power on sequence Retry Mode In Retry mode the status LED will start to flash slowly to signal that the control is trying to recover from an input fault The control will stage off the outputs and try to again satisfy the ...

Page 38: ...10 second Fault LED pause 3 Slow flash is 1 flash every 2 seconds 4 Fast flash is 2 flashes every 1 second 5 EXAMPLE Flashing Code 2 is represented by 2 fast flashes fol lowed by a 10 second pause This sequence will repeat continually until the fault is cleared IMPORTANT When a compressor is removed from this unit system refrigerant circuit oil will remain in the com pressor To avoid leakage of co...

Page 39: ... 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 29 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 ...

Page 40: ...a problem due to low voltage See Fig 31 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 32 To prevent personal injury wear safety glasses and gloves when handling refrigerant Do not overcharge sy...

Page 41: ... Check Tables 8 13 X Air temperature out of range Too much cold vent air Bring entering air temperature within design parameters X Improper freeze protect set ting 30 F vs 10 F Normal airside applications will require 30 F only X X Bad thermistor Check temperature and impedance correlation Condensate Fault Code 6 X X Blocked drain Check for blockage and clean drain X X Improper trap Check trap dim...

Page 42: ...X Defective reversing valve Manually check the four way valve to ensure all valves are operational X X Thermostat improperly located Check location and for air drafts behind thermostat X X Unit undersized Recheck loads and sizing check sensible cooling load and heat pump capacity X X Scaling in water heat exchanger Check for scale water deposits and clean if necessary X X Inlet water too hot or co...

Page 43: ...DENSATE 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 ...

Page 44: ...JECTION FLOW RATE GPM x TEMP DIFF DEG F x FLUID FACTOR Btu hr SUPERHEAT SUCTION TEMPERATURE SUCTION SATURATION TEMPERATURE DEG F SUBCOOLING DISCHARGE SATURATION TEMPERATURE LIQUID LINE TEMPERATURE DEG F Use 500 for water 485 for antifreeze a50 8197 eps SUCTION COMPRESSOR DISCHARGE COAX EXPANSION VALVE F F AIR COIL F PSI WATER OUT WATER IN F PSI LOOK UP PRESSURE DROP IN TABLES 22 24 TO DETERMINE FL...

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