Carrier AQUAZONE 50RHE006 Installation And Service Instructions Manual Download

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Output EH2 will be off if FP1 is greater than 7.2 C and FP2

(when shorted) is greater than 43.3 C during Heating Stage 3
mode. This condition will have a 30-second recognition time.
Also, during Heating Stage 3 mode, EH1, EH2, Fan Enable,
and Fan Speed will be ON if G input is not active.
EMERGENCY HEAT — In Emergency Heat mode, the Fan
Enable and Fan Speed relays are turned on. The EH1 output is
turned on immediately. With continuing Emergency Heat de-
mand, EH2 will turn on after 5 minutes. Fan Enable and Fan
Speed relays are turned off after a 60-second delay. The control
reverts to Standby mode.

Output EH1, EH2, Fan Enable, and Fan Speed will be ON if

the G input is not active during Emergency Heat mode.
COOLING STAGE 1 — In Cooling Stage 1 mode, the Fan
Enable, compressor and RV relays are turned on immediately.
If configured as stage 2 (DIP switch set to OFF) then the com-
pressor and fan will not turn on until there is a stage 2 demand.
The fan Enable and compressor relays are turned off immedi-
ately when the Cooling Stage 1 demand is removed. The con-
trol reverts to Standby mode. The RV relay remains on until
there is a heating demand. If there is a master/slave or dual
compressor application, all compressor relays and related func-
tions will track with their associated DIP switch 2 on S1.
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 re-
verts to Cooling Stage 1 mode. If there is a master/slave or dual
compressor application, all compressor relays and related func-
tions will track with their associated DIP switch 2 on S1.
NIGHT LOW LIMIT (NLL) STAGED HEATING — In NLL
staged Heating mode, the override (OVR) input becomes ac-
tive and is recognized as a call for heating and the control will
immediately go into a Heating Stage 1 mode. With an addition-
al 30 minutes of NLL demand, the control will go into Heating
Stage 2 mode. With another additional 30 minutes of NLL
demand, the control will go into Heating Stage 3 mode.

SYSTEM TEST

System testing provides the ability to check the control

operation. The control enters a 20-minute Test mode by
momentarily shorting the test pins (see Fig. 9-12). All time
delays are reduced by a factor of 15.

Test Mode —

To enter Test mode on C or D controls, cycle

the power 3 times within 60 seconds. The LED (light-emitting
diode) will flash a code representing the last fault when enter-
ing the Test mode. The alarm relay will also power on and off
during Test mode. See Tables 13 and 14. To exit Test mode,
short the terminals for 3 seconds or cycle the power 3 times
within 60 seconds.
NOTE: Deluxe D Control has a flashing code and alarm relay
cycling code that will 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.

Table 13 — C Control Current LED Status

and Alarm Relay Operations

LEGEND

NOTES:

1. Slow flash is 1 flash every 2 seconds.
2. Fast flash is 2 flashes every 1 second.
3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by

a 10-second pause. This sequence will repeat continually until the fault is
cleared.

Table 14 — C Control LED Code and

Fault Descriptions

LEGEND

LED STATUS

DESCRIPTION OF OPERATION

ALARM RELAY

Normal Mode

Open

Normal Mode with

PM Warning

Cycle

(closed 5 sec.,

Open 25 sec.)

Off

C Control is non-functional

Open

Slow Flash

Fault Retry

Open

Fast Flash

Lockout

Closed

Slow Flash

Over/Under Voltage Shutdown

Open

(Closed after

15 minutes)

Flashing Code 1

Test Mode — No fault in memory

Cycling Code 1

Flashing Code 2

Test Mode — HP Fault in memory

Cycling Code 2

Flashing Code 3

Test Mode — LP Fault in memory

Cycling Code 3

Flashing Code 4

Test Mode — FP1 Fault in memory

Cycling Code 4

Flashing Code 5

Test Mode — FP2 Fault in memory

Cycling Code 5

Flashing Code 6

Test Mode — CO Fault in memory

Cycling Code 6

Flashing Code 7

Test Mode — Over/Under

shutdown in memory

Cycling Code 7

Flashing Code 8

Test Mode — PM in memory

Cycling Code 8

Flashing Code 9

Test Mode — FP1/FP2

Swapped Fault in memory

Cycling Code 9

—

Condensate Overflow

—

Freeze Protection

—

High Pressure

LED —

Light-Emitting Diode

—

Low Pressure

—

Performance Monitor

LED

CODE

FAULT

DESCRIPTION

No fault in memory

There has been no fault since
the last power-down to power-up
sequence

High-Pressure Switch

HP Open Instantly

Low-Pressure Switch

LP open for 30 continuous sec-
onds before or during a call
(bypassed for first 60 seconds)

Freeze Protection Coax
— FP1

FP1 below Temp limit for 30 con-
tinuous seconds (bypassed for
first 60 seconds of operation)

Freeze Protection Air Coil
— FP2

FP2 below Temp limit for 30 con-
tinuous seconds (bypassed for
first 60 seconds of operation)

Condensate overflow

Sense overflow (grounded) for
30 continuous seconds

(Autoreset)

Over/Under Voltage
Shutdown

"R" power supply is <19VAC or
>30VAC

PM Warning

Performance Monitor Warning
has occurred.

FP1 and FP2 Thermistors
are swapped

FP1 temperature is higher than
FP2 in heating/test mode, or FP2
temperature is higher than FP1
in cooling/test mode.

—

Freeze Protection

—

High Pressure

LED —

Light-Emitting Diode

—

Low Pressure

—

Performance Monitor

Summary of Contents for AQUAZONE 50RHE006

Page 1: ...Mode 21 Units with Aquazone Complete C Control 21 Units with Aquazone Deluxe D Control 21 SYSTEM TEST 22 23 Test Mode 22 Retry Mode 23 Aquazone Deluxe D Control LED Indicators 23 SERVICE 23 25 Filters 23 Water Coil 23 Condensate Drain Pans 24 Refrigerant System 24 Condensate Drain Cleaning 24 Air Coil Cleaning 24 Condenser Cleaning 24 Checking System Charge 24 Refrigerant Charging 25 Air Coil Fan ...

Page 2: ...cally sensitive spaces NOTE A sound control accessory package may be used to help eliminate sound in sensitive spaces 4 Check local codes to be sure a secondary drain pan is not required under the unit 5 Be sure unit is mounted at a height sufficient to provide an adequate slope of the condensate lines If an appropri ate slope cannot be achieved a field supplied condensate pump may be required 6 P...

Page 3: ...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 UNIT 50RHE 006 009 012 015 019 024 030 036 042 048 ...

Page 4: ...rovided 4 Right and left orientation is determined by looking at water connection side 50RHE 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 J 1 2 conduit K 1 2 conduit L 3 4 conduit A Width B Depth C Height D In E Out F Cond ensate Low Voltage Ext Pump Power Supply...

Page 5: ...ply Air Insulated supply duct with at least one 90 degree elbow to reduce air noise field supplied Flexible Connection 50RHR RHS Install screw as shown Sizes 042 060 Optional on smaller sizes Vibration Isolator white compressor end and red blower end size 042 070 Washer by others Double Hex Nuts by others Unit Power Unit Power Disconnect Unit Hanger Low Pressure Drop Water Control Valve optional f...

Page 6: ...in the field due to refrigerant piping changes Preparation The unit should be on the ground in a well lit area for conversion Hung units should be taken down to ground level before converting Side to Back Discharge Conversion 1 Remove screws to free the top and discharge panels See Fig 3 2 Remove the access panel and set aside 3 Lift the discharge panel from side of unit and rotate it to back usin...

Page 7: ...ity Hard duct ventilation may be required for the ventilating air supply If hard ducted venti lation is not required be sure that a proper air path is provided for ventilation air to unit to meet ventilation requirement of the space Step 6 Condensate Drain Slope the unit to ward the drain at a 6 5 mm per 30 cm pitch See Fig 6 If it is not possible to meet the required pitch install a condensate pu...

Page 8: ...tenance and servicing pressure temperature P T ports are necessary for temperature and flow verification In addition to complying with any applicable codes consid er the following for system piping Piping systems using water temperatures below 10 C require 12 7 mm closed cell insulation on all piping surfaces to eliminate condensation Avoid all plastic to metal threaded fittings due to the potenti...

Page 9: ...onduit to minimize vibration and sound transmission to the building Table 2 Water Quality Guidelines If the concentration of these corrosives exceeds the maximum allowable level then the potential for serious cor rosion 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 ...

Page 10: ...ection GND Ground HP High Pressure Switch JW Clippable Field Selection Jumper LOC Loss of Charge Pressure Switch P1 Field Wiring Terminal Block PB Power Block Optional wiring NOTES 1 Compressor and blower motor thermally protected internally 2 All wiring to the unit must comply with NEC and local codes 3 Transformer is wired to 240 v ORG lead for 240 50 1 units switch RED and ORG leads to PB 1 and...

Page 11: ...ble Field Selection Jumper LOC Loss of Charge Pressure Switch P1 Field Wiring Terminal Block PB Power Block Optional wiring NOTES 1 Compressor and blower motor thermally protected internally 2 All wiring to the unit must comply with NEC and local codes 3 Transformer is wired to 240 v ORG lead for 240 50 1 units switch RED and ORG leads to PB 3 and insulate ORG lead 4 FP1 thermistor provides freeze...

Page 12: ...ensor Condensate Overflow FP1 Sensor Water Coil Freeze Protection FP2 Sensor Air Coil Freeze Protection GND Ground HP High Pressure Switch HWTS High Leaving Water Temp Switch JW Clippable Field Selection Jumper LOC Loss of Charge Pressure Switch MV Motorized Valve Optional wiring NOTES 1 Compressor thermally protected internally 2 All wiring to the unit must comply with NEC and local codes 3 Trans...

Page 13: ...ure Switch HWTS High Leaving Water Temp Switch JW Clippable Field Selection Jumper LOC Loss of Charge Pressure Switch MV Motorized Valve P1 Field Wiring Terminal Block PB Power Block Optional wiring NOTES 1 Compressor thermally protected internally 2 All wiring to the unit must comply with NEC and local codes 3 Neutral of 380 415 3 50 is required Transformer is wired to 240 v ORG lead for 415 3 50...

Page 14: ...All 220 240 volt units are factory wired for 208 volts The transformers may be switched to 220 volt operation by switching the red 220 volt wire with the orange 240 volt wire at the TB1 1 terminal for single phase and TB1 3 for 3 phase 50RHE UNIT VOLTS PHASE 50 Hz VOLTAGE MIN MAX COMPRESSOR FAN MOTOR FLA TOTAL UNIT FLA MIN CIRCUIT AMP MAX FUSE HACR RLA LRA 006 220 240 1 197 254 2 3 15 0 0 4 2 7 3 ...

Page 15: ...MED 160 146 127 113 94 LO 151 137 123 109 90 012 140 104 HI 170 165 151 137 123 109 MED 165 151 142 127 118 LO 146 137 127 118 104 015 212 160 HI 345 316 288 250 198 MED 321 302 274 241 189 LO 293 278 255 222 179 019 264 198 HI 326 311 283 250 203 MED 302 288 260 227 189 LO 293 269 245 217 179 024 307 231 HI 396 368 335 302 260 MED 387 359 326 297 255 LO 368 340 311 278 231 030 349 264 HI 529 496 ...

Page 16: ...n during a lockout 2 Draw approximately 25 to 35 VA through the Y signal of the thermostat PRE START UP System Checkout When the installation is complete follow the System Checkout procedure outlined below before starting up the system Be sure 1 Voltage is within the utilization range specifications of the unit compressor and fan motor and voltage is balanced for 3 phase units 2 Fuses breakers and...

Page 17: ...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 stage 2 call from the thermostat This setting is used with dual stage units units with 2 compressors and...

Page 18: ...tions in temperature humidi ty and corrosive water or air will adversely affect the unit per formance reliability and service life POWER SUPPLY A voltage variation of 10 of name plate utilization voltage is acceptable UNIT STARTING CONDITIONS Depending on the mod el units start and operate in an ambient temperature of 7 2 C with entering air temperature at 4 4 C or 10 C entering water temperature ...

Page 19: ...able 8 Water Temperature Change Through Heat Exchanger Unit Start Up Heating Mode NOTE Operate the unit in heating cycle after checking the cooling cycle Allow five minutes between tests for the pres sure 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...

Page 20: ... 275 to 345 kPa for winter months or 105 to 135 kPa 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 T...

Page 21: ...GE 1 Terminal Y is active in heating stage 1 After power up the first call to the compressor will initiate a 5 to 80 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 terminal W is active Y is alread...

Page 22: ...and off during Test mode See Tables 13 and 14 To exit Test mode short the terminals for 3 seconds or cycle the power 3 times within 60 seconds NOTE Deluxe D Control has a flashing code and alarm relay cycling code that will 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 ...

Page 23: ...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 followed by a 10 second pause This sequence will repeat contin ually 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 compressor oil the...

Page 24: ...prevent liquid from being carried over by the gases Warm solution acts faster but cold solution is just as effec tive 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 18 FORCE...

Page 25: ... motor to hang by its power wires TROUBLESHOOTING Fig 20 and 21 and Table 16 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 20 for thermistor nominal resistance Control Sensors The control system employs 2 nom inal 10 000 ohm thermistors FP1 and FP2 that ...

Page 26: ...heck Table 4 X Air temperature out of range Too much cold vent air Bring entering air temperature within design parameters X Improper freeze protect set ting 1 1 C vs 12 2 C Normal airside applications will require 1 1 C 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 dimen...

Page 27: ... thermostat X X Unit undersized Recheck loads and sizing check sensible cooling load and heat pump capacity X X Scaling in water heat exchanger Perform scaling check and clean if necessary X X Inlet water too hot or cold Check load loop sizing loop backfill ground moisture High Head Pressure X Reduced or no airflow in heating Check for dirty air filter and clean or replace Check fan motor operatio...

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Page 30: ...scontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 005 00042 Printed in U S A Form 50RHE C1SI Pg 30 2 04 Replaces New Book 1 4 Tab 5a 5a Copyright 2004 Carrier Corporation ...

Page 31: ...TE 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 VOLTA...

Page 32: ... OF REJECTION FLOW RATE L S x TEMP DIFF DEG C x FLUID FACTOR kW SUPERHEAT SUCTION TEMPERATURE SUCTION DEW POINT TEMPERATURE DEG C SUBCOOLING DISCHARGE BUBBLE POINT TEMPERATURE LIQUID LINE TEMPERATURE DEG C Use 4 16 for water 4 03 for antifreeze SUCTION COMPRESSOR DISCHARGE COAX EXPANSION VALVE C C AIR COIL C kPa WATER OUT WATER IN C kPa LOOK UP PRESSURE DROP IN TABLE 10 TO DETERMINE FLOW RATE C LI...

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