Carrier AQUAZONE 50PTD026 Installation And Service Instructions Manual Download

Page: 1 / 64

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

Catalog No. 04-53500079-01

Printed in U.S.A.

Form 50PT-4SI

Pg 1

7-10

Replaces: 50PT-3SI

Installation, Start-Up, and Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

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

GENERAL

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

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29

Step 1 — Check Jobsite

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

Step 2 — Check Unit

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

• STORAGE

• PROTECTION

• INSPECT UNIT

Step 3 — Locate Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

• FIELD CONVERSION OF DISCHARGE AIR

Step 4 — Mount the Unit

. . . . . . . . . . . . . . . . . . . . . . . . . 9

• HORIZONTAL UNIT

• VERTICAL UNITS

Step 5 — Check Duct System

. . . . . . . . . . . . . . . . . . . . 9

• SOUND ATTENUATION

• EXISTING DUCT SYSTEM

Step 6 — Install Condensate Drain

. . . . . . . . . . . . . . . 9

• HORIZONTAL UNIT

• VERTICAL UNITS

• VENTING

Step 7 — Pipe Connections

. . . . . . . . . . . . . . . . . . . . . 10

• WATER LOOP APPLICATIONS

• GROUND-WATER APPLICATIONS

• GROUND-LOOP APPLICATIONS

• INSTALLATION OF SUPPLY AND RETURN HOSE

KIT

Step 8 — Wire Field Power Supply

. . . . . . . . . . . . . . 12

• POWER CONNECTION

• SUPPLY VOLTAGE

• 208-VOLT OPERATION

• 460-VOLT OPERATION

• WSHP OPEN WIRING

Step 9 — Wire Field Controls

. . . . . . . . . . . . . . . . . . . . 25

• THERMOSTAT CONNECTIONS

• WATER FREEZE PROTECTION

• AIR COIL FREEZE PROTECTION

• ACCESSORY CONNECTIONS

• WATER SOLENOID VALVES

Step 10 — Operate ECM Interface Board

. . . . . . . . 27

• STANDALONE — NO DDC CONTROLS

• WSHP OPEN CONTROLS

PRE-START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29,30

System Checkout

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

FIELD SELECTABLE INPUTS

. . . . . . . . . . . . . . . . . 30-33

Complete C Control Jumper Settings

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

Deluxe D Control Jumper Settings

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

Complete C Control DIP Switches

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

Deluxe D Control DIP Switches

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

Units with Modulating Hot Water Reheat

(HWR) Option

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

• STANDALONE — NO DDC CONTROLS

• WSHP OPEN CONTROLS

• HWR APPLICATION CONSIDERATIONS

• HWR COMPONENT FUNCTIONS

Deluxe D Control Accessory

Relay Configurations

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

Page

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-38

Operating Limits

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

Scroll Compressor Rotation

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

Unit Start-Up Cooling Mode

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

Unit Start-Up Heating Mode

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

Unit Start-Up with WSHP Open Controls

. . . . . . . . 36

Flow Regulation

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

Flushing

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

Antifreeze

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

Cooling Tower/Boiler Systems

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

Ground Coupled, Closed Loop and Plateframe

Heat Exchanger Well Systems

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

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-42

Power Up Mode

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

Units with Aquazone™ Complete C Control

. . . . . 39

Units with Aquazone Deluxe D Control

. . . . . . . . . . 39

Units with WSHP Open Multiple Protocol

. . . . . . . . 39

COMPLETE C AND DELUXE D BOARD

SYSTEM TEST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42,43

Test Mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

WSHP Open Test Mode

. . . . . . . . . . . . . . . . . . . . . . . . . . 43

Retry Mode

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Aquazone Deluxe D Control LED Indicators

. . . . . 43

SERVICE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44,45

Filters

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Water Coil

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Condensate Drain Pans

. . . . . . . . . . . . . . . . . . . . . . . . . 44

Refrigerant System

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Compressor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Fan Motors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Condensate Drain Cleaning

. . . . . . . . . . . . . . . . . . . . . 44

Air Coil Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Condenser Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Checking System Charge

. . . . . . . . . . . . . . . . . . . . . . . 45

Refrigerant Charging

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Air Coil Fan Motor Removal

. . . . . . . . . . . . . . . . . . . . . 45

Replacing the WSHP Open Controller’s

Battery

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . 45-53

Thermistor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Control Sensors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

WSHP Open Controller

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Thermostatic Expansion Valves

. . . . . . . . . . . . . . . . . . 46

Stopped or Malfunctioned ECM Motor

. . . . . . . . . . . . 50

Moisture Check

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

APPENDIX A — WSHP OPEN SCREEN

CONFIGURATION

. . . . . . . . . . . . . . . . . . . . . . . . . . 54-59

50PTH,PTV,PTD 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

IMPORTANT: Read the entire instruction manual before

starting installation.

AQUAZONE™

50PTH, PTV, PTD026-072

Two-Stage Water Source Heat Pumps

with PURON

Refrigerant (R-410A)

Summary of Contents for AQUAZONE 50PTD026

Page 1: ...ONE NO DDC CONTROLS WSHP OPEN CONTROLS HWR APPLICATION CONSIDERATIONS HWR COMPONENT FUNCTIONS Deluxe D Control Accessory Relay Configurations 32 Page START UP 33 38 Operating Limits 33 Scroll Compressor Rotation 34 Unit Start Up Cooling Mode 34 Unit Start Up Heating Mode 34 Unit Start Up with WSHP Open Controls 36 Flow Regulation 37 Flushing 37 Antifreeze 37 Cooling Tower Boiler Systems 38 Ground ...

Page 2: ...TICAL AND DOWNFLOW UNITS 50PTV PTD Vertical units are designed for indoor installations While verti cal 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 and 4 for overall dimensions Refer to Fig 5 for an example of a typical vertical installation Refer to Fi...

Page 3: ... until the compressor rides freely on springs Remove shipping restraints 6 Remove the four 1 4 in shipping bolts from compressor support plate two bolts on each side to maximize vibra tion and sound alternation 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...

Page 4: ... Shaded areas are recommended service areas not required 6 Discharge can be modified in field Return cannot be modified AIRFLOW CONFIGURATION 50PTH UNIT OVERALL CABINET in WATER CONNECTIONS in WATER CONNEC TIONS in UNITS WITH HWR ELECTRICAL KNOCKOUTS in DISCHARGE CONNECTIONS in DUCT FLANGE INSTALLED 0 10 in RETURN CONNECTION USING AIR COIL OPENING in A Width B Depth C Height 1 2 3 4 5 Loop Water F...

Page 5: ...ct with at least one 90 degree elbow to reduce air noise field supplied Flexible Connection Vibration Isolator white compressor end and red blower end Washer by others Double Hex Nuts by others Unit Power Unit Power Disconnect by others Unit Hanger factory supplied Low Pressure Drop Water Control Valve optional field installed accessory Ball Valve with optional integral P Tplug typical for supply ...

Page 6: ... in WATER CONNECTIONS in WATER CONNEC TIONS in UNITS WITH HWR ELECTRICAL KNOCKOUTS in DISCHARGE CONNECTIONS in DUCT FLANGE INSTALLED 0 10 in RETURN CONNECTION USING AIR COIL OPENING in A Width B Depth C Height 1 2 3 4 5 Loop Water FPT in HWG FPT in 1 2 J 1 2 in Cond K 1 2 in Cond L 3 4 in Cond M LH rtn N O Supply Width P Supply Depth Q RH rtn R S Return Depth T Return Height U D In E Out F HWG In ...

Page 7: ... rtn N O Supply Width P Supply Depth Q RH rtn R S Return Depth T Return Height U D In E Out F HWG In G HWG Out H Cond ensate Loop in D Loop out E Low Voltage Ext Pump Power Supply 026 22 4 25 6 52 5 2 1 10 0 13 9 16 9 3 6 3 4 1 2 2 1 10 0 3 6 6 1 8 6 6 7 8 4 10 1 9 1 10 8 2 2 21 1 27 2 1 0 038 25 4 30 6 54 5 3 4 10 8 15 6 18 9 3 6 3 4 1 2 5 96 13 13 3 6 6 1 8 6 7 2 9 0 13 4 12 9 10 4 2 2 26 1 27 2...

Page 8: ...harge air of the 50PTH horizontal units can be converted between side and back discharge in the field The conversion process is the same for right and left return configurations See Fig 7 and 8 NOTE It is not possible to convert return air between left or right return models in the field due to refrigerant piping changes Preparation The unit should be on the ground in a well lit area Hung units sh...

Page 9: ...itioned space is not recommended since it will sweat and adversely affect the unit s performance To reduce air noise at least one 90 degree elbow could 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 E...

Page 10: ...mprises 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 P T ports are necessary for temperature and flow verification Cooling tower boiler systems typically utilize a common loop maintained at 60 to 95 F The use of a closed circuit evap orative cooling tower w...

Page 11: ...red 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 ex pected dew point of the pipe ambient Insulation is required if loop water temperature drops below the dew point Pipe joint compound is not necessary when Teflon threaded tape is pre applied to hose assemblies or when flared end connections ...

Page 12: ...l pipe use Langelier Saturation Index All N A 0 5 to 0 5 If 0 5 minimize steel pipe use Based upon 150 F HWG and direct well 85 F indirect well HX Iron Fouling Iron Fe2 Ferrous Bacterial Iron Potential All N A 0 2 ppm Ferrous If Fe2 ferrous 0 2 ppm with pH 6 8 O2 5 ppm check for iron bacteria Iron Fouling All N A 0 5 ppm of Oxygen Above this level deposition will occur Corrosion Prevention pH All ...

Page 13: ...age to electri cal components NOTE If more than 2 voltage imbalance is present contact your local electric utility 208 VOLT OPERATION All 208 230 volt units are factory wired for 208 volts The transformers may be switched to 230 volt operation by switching the red 208 volt wire with the orange 230 volt wire at the L1 terminal 460 VOLT OPERATION Units using 460 v and an ECM electronically commutate...

Page 14: ... for 220 240 v will be connected for 220 v operation For 240 v operation disconnect RED lead at L1 and attach ORN lead to L1 Transformer is energy limiting or may have cir cuit breaker 4 FP1 thermistor provides freeze protection for water When using antifreeze solutions cut JW3 jumper 5 Typical Aquazone thermostat wiring shown Refer to thermostat installation instructions for wiring to the unit Th...

Page 15: ...0 v will be connected for 220 v operation For 240 v operation disconnect RED lead at L1 and attach ORN lead to L1 Transformer is energy limiting or may have circuit breaker 4 FP1 thermistor provides freeze protection for water When using antifreeze solutions cut JW3 jumper 5 Typical Aquazone thermostat wiring shown Refer to thermostat installation instructions for wiring to the unit Thermostat wir...

Page 16: ...nsformer for 220 240 v will be connected for 220 v operation For 240 v operation disconnect RED lead at L1 and attach ORN lead to L1 Transformer is energy limiting or may have circuit breaker 4 FP1 thermistor provides freeze protection for water When using antifreeze solutions cut JW3 jumper 5 Typical Aquazone thermostat wiring shown Refer to thermostat installation instructions for wir ing to the...

Page 17: ...ll be connected for 220 v operation For 240 v operation disconnect RED lead at L1 and attach ORN lead to L1 Transformer is energy limiting or may have cir cuit breaker 4 FP1 thermistor provides freeze protection for water When using antifreeze solutions cut JW3 jumper 5 Typical Aquazone thermostat wiring shown Refer to thermostat installation instructions for wiring to the unit Thermostat wiring m...

Page 18: ... NEC and local codes 3 FP1 thermistor provides freeze protection for water When using antifreeze solutions cut JW3 jumper 4 Typical Aquazone thermostat wiring shown Refer to thermostat installation instructions for wir ing to the unit Thermostat wiring must be Class 1 and voltage rating equal to or greater than unit supply voltage 5 24 v alarm signal shown For dry alarm contact cut JW1 jumper and ...

Page 19: ...oil Condensate Pan Solenoid Coil Thermistor Ground Wire Nut NOTES 1 Compressor and blower motor thermally protected internally 2 All wiring to the unit must comply with NEC and local codes 3 FP1 thermistor provides freeze protection for water When using antifreeze solutions cut JW3 jumper 4 Typical Aquazone thermostat wiring shown Refer to thermostat installation instructions for wiring to the uni...

Page 20: ...contact will be available between AL1 and AL2 7 Transformer secondary ground via Complete C board standoffs and screws to control box Ground available from top two standoffs as shown 8 Aquastat is supplied with unit and must be wired in series with the hot leg to the pump Aquastat is rated for voltages up to 277 v 9 Optional LON wires Only connect if LON connection is desired at the wall sensor 10...

Page 21: ...or water When using antifreeze solutions cut JW3 jumper 5 Typical thermostat wiring shown Refer to thermostat installation instructions for wiring to the unit Ther mostat wiring must be Class 1 and voltage rating equal to or greater than unit supply voltage 6 Factory cut JW1 jumper Dry contact will be available between AL1 and AL2 7 Transformer secondary ground via Deluxe D board standoffs and scr...

Page 22: ... the unit must comply with NEC and local codes 3 208 240 60 Hz units are wired for 208v operation For 240v 60 Hz operation switch RED wire to ORG wire 2240240v 50 Hz units are wired for 240v operation For 220v 50 Hz operation switch ORG wire to RED Transformer is energy limiting or may have circuit breaker 4 FP1 thermistor provides low temperature protection for water When using antifreeze solutio...

Page 23: ... Air Quality 33ZCSENCO2 AI 4 20mA J4 2 and 3 Analog Input 2 Condensate Switch N A BI Dry Contacts J1 2 Binary Input 3 Stage 1 Compressor Status N A BI Dry Contacts J1 10 Binary Input 5 Leaving Condenser Water Temperature 10K Type II AI 10K Thermistor J2 1 and 2 Analog Input 6 Supply Air Temperature 33ZCSENSAT AI 10K Thermistor J2 3 and 4 Analog Input 7 Outputs Modulating Valve Auxiliary Heat Water...

Page 24: ...ve combinations plus up to 2 BACview6 Handheld but no more than 6 total devices NOTE If the Rnetbus has multiple SPT Standard sensors each sensor must be given a unique address on the Rnetbus See the Carrier Open Sensor Installation Guide Use the specified type of wire and cable for maximum signal integrity See Table 7 Table 7 Rnet Wiring Specifications LEGEND COMPLETE C CONTROL ECM CONTROL BOARD ...

Page 25: ...e externally powered both sensors may be used on the same zone controller If the cable used to wire the RH sensor to the controller will be less than 100 ft an unshielded 22 AWG American Wire Gage cable should be used If the cable will be greater than 100 ft a shield 22 AWG cable should be used The cable should have a maximum length of 500 ft To wire the RH sensor to the controller 1 Strip the out...

Page 26: ... Accessory Wiring a50 8141 COMPLETE C CONTROL CAPACITOR L IN E L O A D COMPRESSOR CONTACTOR TRANSFORMER Y G G G G R W O Y2 Y1 G R C Y2 Y1 G O W C R DH AL1 A A AL1 SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 OFF ON G DEHUM CFM TB1 J1 S1 THERMOSTAT CONNECTION a50 7764tf Fig 30 AMV Valve Wiring C C THERMOSTAT 1 Y 1 2 3 1 Y AMV TACO VALVE HEATER SWITCH a50 8441 Fig 31 Taco SBV Valve Wiring a50 8442 ...

Page 27: ...ting in Table 12 Table 12 Dehumidificaton Mode Settings When dehumidification is enabled there is a reduction in airflow in cooling to increase the moisture removal of the heat pump The Dehumidification mode can be enabled in two ways 1 Constant Dehumidification mode When the Dehumidifi cation mode is selected via DIP switch the ECM will operate with a multiplier applied to the cooling CFM setting...

Page 28: ...capacity to prevent excessively hot or cold supply air temperature and coil freeze up The selection of the high fan airflow setting is independent of the other fan airflow settings and is defined in Table 14B The high airflow must be chosen so that it is equal to or greater than the medium fan air flow Therefore the tap setting for high fan SW5 and SW6 MUST equal or exceed the tap chosen for the S...

Page 29: ...reely shipping support is removed 12 Blower speed is on correct setting 13 Air filter is clean and in position 14 Service access panels are in place 15 Return air temperature is between 40 to 80 F heating and 50 to 110 F cooling 50PT UNIT SIZE MAX ESP FAN MOTOR HP TAP SETTING SW 3 SW 1 SW 4 SW 2 FAN ONLY COOLING AND HEATING LOW FAN COOLING AND HEATING MED FAN 26 0 5 0 5 4 OFF OFF 475 920 1050 3 OF...

Page 30: ...rmal then EH2 will operate as standard electric heat output Set the switch to ON to set the EH2 to normal Set the switch to OFF to set the DDC output at EH2 FACTORY SETTING Switch 5 is set to ON Do not change the switch to OFF unless instructed to do so by the factory Deluxe D Control DIP Switches The Deluxe D control has 2 DIP dual in line package switch banks Each bank has 8 switches and is labe...

Page 31: ...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 Heating Stage 2 Reheat Mode...

Page 32: ...MPRESSOR In this configuration the accessory relay 2 will be ON any time the Compressor relay is on DIGITAL NIGHT SET BACK NSB In this configura tion the relay will be ON if the NSB input is connected to ground C NOTE If there are no relays configured for digital NSB then the NSB and override OVR inputs are automatically config ured for mechanical operation MECHANICAL NIGHT SET BACK When NSB input...

Page 33: ...e cooling cycle first then the heating cycle Refer to Table 18 for unit operating limits Al low 15 minutes between cooling and heating tests for pressure to equalize NOTE Two factors determine the operating limits of a unit entering air temperature and water 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 ...

Page 34: ... 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 Compare to Tables 20 23 If temperature is within range proceed If temperature is outside the range check the heating refrigerant pressures in Tables 20 23 5 Once the unit has begun to run check for warm air deliv ery at the unit grill...

Page 35: ... 12 9 14 4 6 19 25 50 1 5 125 135 242 262 13 18 10 15 20 9 22 9 19 25 93 103 314 334 8 13 10 15 11 5 13 5 23 29 2 25 123 133 224 244 13 18 9 14 15 6 17 6 19 25 98 108 320 340 8 13 10 15 8 7 10 7 24 30 3 122 132 205 225 14 19 7 12 10 2 12 2 19 25 103 113 326 346 8 13 10 15 5 9 7 9 25 31 70 1 5 133 143 310 330 8 13 8 13 20 5 22 5 19 25 123 133 344 364 9 14 9 14 15 17 28 35 2 25 132 142 290 310 8 13 ...

Page 36: ...press Clockset b Scroll to hour minute and second using the arrow keys Use the number keypad to set actual time c Scroll to day month and year using arrow keys Use number keypad to set date 5 To set Daylight Savings Time DST a Push the DST softkey The display will indicate 02 00 060 which is equal to 2 00AM b To program the beginning and end dates scroll down to the beginning month and press the e...

Page 37: ...p 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 flush ing 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 Pres sures will be higher in the winter month...

Page 38: ...terminal Y is not Terminal G must be active or the W terminal is disregarded EH1 is immediately turned on EH2 will turn on after 5 minutes of continual emergency heat demand Units with Aquazone Deluxe D Control EXTENDED COMPRESSOR OPERATION MONITOR If the compressor has been on for 4 continuous hours the con trol will automatically turn off the compressor relay and wait the short cycle time protec...

Page 39: ...ule navigate to Config then Sched then enter BACview6 Admin Password 1111 then go to schedule_schedule From here enter either a Weekly or Excep tion schedule for the unit Occupancy Input Contact The WSHP Open controller has the capability to use an external dry contact closure to deter mine the occupancy status of the unit The Occupancy Sched ules will need to be disabled in order to utilize the o...

Page 40: ...ped and caused the compressor to stop operating normally If this should occur an alarm will be generated to indicate the faulted compressor condition HEATING The WSHP Open controller will operate one or two stages of compression to maintain the desired heating set point The compressor outputs are controlled by the heating PI proportional integral loop and heating stages capacity algo rithm They wi...

Page 41: ...P Open controller will provide occupied and unoccupied dehumidification only on units that are equipped with the modulating hot water reheat HWR option This function requires an accessory space rela tive humidity sensor When using a relative humidity sensor to control dehumidification during occupied or unoccupied times the dehumidification set points are used accordingly When the indoor relative ...

Page 42: ...enters a 20 minute test mode by momentarily shorting the test terminals All time de lays are sped up 15 times The following operations are com mon to both Complete C and Deluxe D controls Test Mode To enter Test mode cycle the fan 3 times within 60 seconds The LED will flash a code representing the last fault when entering the Test mode The alarm relay will also power on and off during Test mode S...

Page 43: ...Status LED indicates the current status or mode of the D control The Status LED light is green TEST LED Test LED will be activated any time the D control is in test mode The Test LED light is yellow FAULT LED Fault LED light is red The fault LED will always flash a code representing the last fault in memory If there is no fault in memory the fault LED will flash code 1 and appear as one fast flash...

Page 44: ...y 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 ...

Page 45: ...ft 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 Replacing the WSHP Open Controller s Bat tery The WSHP Open controller s 10 year lithium CR2032 battery provides a minimum of 10 000 hours of data retention during power outages NOTE Power must be ON to the WSHP Open controller when replacing the ...

Page 46: ...n 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 ...

Page 47: ...proper water flow and water tempera ture 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 ...

Page 48: ...n Troubleshooting Motor rocks Check for loose or non compliant motor mount Make sure blower wheel is tight on shaft Perform motor control replacement check Motor oscillates up and down while being tested off of blower It is normal for motor to oscillate with no load on shaft Motor starts but runs erratically Varies up and down or intermittent Check line voltage for variation or sag Check low volta...

Page 49: ...49 Fig 39 ECM Pin Connectors a50 8448 ...

Page 50: ...opped or Malfunctioned ECM Motor Refer to Fig 40 to determine the possible cause of a stopped or mal functioned ECM motor Follow the instructions in the boxes Fig 40 ECM Troubleshooting Flow Diagram a50 8447 ...

Page 51: ... replace Check fan motor operation and airflow restrictions Dirty air coil construction dust etc External static too high Check blower performance per Tables 9 13 X Air temperature out of range in heating Bring return air temperature within design parameters X X Overcharged with refrigerant Check superheat subcooling vs typical operating condition per Tables 20 23 X X Bad HP switch Check switch co...

Page 52: ...mp Jumper Y and R for compressor operation in test mode X X Fan motor relay Jumper G and R for fan operation Check for line voltage across BR contacts Check fan power enable relay operation if present X X Fan motor Check for line voltage at motor Check capacitor Unit Does Not Operate in Cooling X Reversing valve Set for cooling demand and check 24 vac on RV coil and at control If RV is stuck run h...

Page 53: ...g load and heat pump capacity Low Refrigerant Suction Pressure X Normal operation Check compare with unit Installation Manual for typical operating temper atures and pressures chart X Reduced water flow Check pump operation Check strainer or filter Improper flow regulator X Water temperature out of range Bring water temperature within proper range X Scaling in water to refrigerant heat exchanger C...

Page 54: ...plays the SPT alarm limit that was exceeded causing the alarm condition when SPT alarm above is in Alarm SPT Sensor Alarm Status Normal Alarm Displays the status of the Rnet SPT sensor ALARM is displayed should the sensor fail to communicate with the control module IAQ Alarm Status Normal Alarm Current IAQ ventilation condition Compressor Alarm Status Normal Alarm Current compressor condition SAT ...

Page 55: ...ation damper position calculated by the DCV control Active Compressor Stages 0 1 2 Displays the actual number of compressor stages operating SAT F Displays SAT Reset Filter Alarm X No Yes Used to reset the filter alarm timer after the filter has been cleaned or replaced Overflow Contact Closed Open Displays the state of the condensate overflow switch contact Occupancy Contact Closed Open Displays ...

Page 56: ... the control set point used to define where the ventilation will reach its maximum limit during occupied periods Viewable only if Ventilation DMP Type DCV Used to determine DCV ending control point Configuration Schedule Weekly Schedule Start Time User Admin Password level access X 00 00 23 59 06 00 Defines the start time for an occupied period End Time X 00 00 24 00 18 00 Defines the ending time ...

Page 57: ...s locked out when OAT is greater than configured value and OAT is actively being broadcast Power Fail Restart Delay X 0 600 sec 60 sec Delay before equipment starts Occupancy Schedules X Disable Enable Enable Enables unit occupied Set Point Separation X 2 9 F 4 F Used to enforce minimum set point separation Configuration Service Test Test Mode Admin Password level access only X Disable Enable Disa...

Page 58: ...dity sensor is present Factory Dehumidifica tion Reheat Coil X None Installed None Set to Installed if factory installed dehumidification reheat coil is present Occupancy Input Logic X Occupied Open Occupied Closed Occupied CLOSED Used to determine external occu pancy switch contact occupied state Condensate Switch Alarm Delay X 5 600 seconds 10 sec Delay before equipment alarms on high condensate...

Page 59: ...Q Ventilation Occupied High Alarm Limit X 0 9999 ppm 1100 ppm Defines the fixed occupied high space IAQ Ventilation alarm limit IAQ Ventilation Alarm Delay X 0 1 1 0 min per ppm 0 25 min Used to calculate the delay time before an alarm is generated after the alarm condition occurs Rnet Sensor SPT Alarm X Ignore Display Ignore Determines if the SPT alarm is displayed on the local Rnet sensor Rnet S...

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Page 62: ... to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500079 01 Printed in U S A Form 50PT 4SI Pg 62 7 10 Replaces 50PT 3SI Copyright 2010 Carrier Corporation ...

Page 63: ...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 ...

Page 64: ... 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 SUCTION COMPRESSOR DISCHARGE COAX EXPANSION VALVE F F AIR COIL F PSI FLUID OUT FLUID IN F PSI F LIQUID LINE PSI F SAT LOOK UP PRESSURE DROP IN TABLES 20 23 TO DETERMIN...

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Carrier AQUAZONE 50PTD026, Installation And Service Instructions Manual

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