Manuals / Carrier / Household Appliance / Heat Pump

Carrier RHS Refrigerant Charging, Air Coil Fan Motor Removal, TROUBLESHOOTING and 32, and Table

Models: 50RHC RHS RVC RHR RVR RDS006-060 RVS

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Refrigerant Charging

Refrigerant Charging

To prevent personal injury, wear safety glasses and gloves when handling refrigerant. Do not overcharge system — this can cause compressor flooding.

NOTE: Do not vent or depressurize unit refrigerant to atmosphere. Remove and reclaim refrigerant following accepted practices.

Air Coil Fan Motor Removal

Before attempting to remove fan motors or motor mounts, place a piece of plywood over evaporator coils to prevent coil damage.

Disconnect motor power wires from motor terminals before motor is removed from unit.

1.Shut off unit main power supply.

2.Loosen bolts on mounting bracket so that fan belt can be removed.

3.Loosen and remove the 2 motor mounting bracket bolts on left side of bracket.

TROUBLESHOOTING

(Fig. 31 and 32, and Table 30)

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. 31 for thermistor nominal resistance.

		90.0
		80.0
		70.0
	(kOhm)	60.0
	(kOhm)	50.0
	Resistance	50.0
	Resistance	40.0

30.0

20.0

10.0

0.0

0.020.0 40.0 60.0 80.0 100.0 120.0 140.0

Temperature (degF)

Fig. 31 — Thermistor Nominal Resistance

4.Slide motor/bracket assembly to extreme right and lift out through space between fan scroll and side frame. Rest motor on a high platform such as a step ladder. Do not allow motor to hang by its power wires.

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.

	AIR
AIRFLOW	COIL	AIRFLOW
AIRFLOW		AIRFLOW
(°F)		(°F)
a50-8163
THERMISTOR
			EXPANSION	COAX
			VALVE
		FP2	FP1
CONDENSATE
	OVERFLOW		LIQUID
	(CO)		LIQUID
	(CO)		LINE	WATER IN	WATER OUT
LEGEND			LINE
		AIR COIL
		AIR COIL	WATER
COAX — Coaxial Heat Exchanger		FREEZE	WATER
COAX — Coaxial Heat Exchanger		FREEZE	COIL
Airflow		PROTECTION	COIL
Airflow			PROTECTION

Refrigerant Liquid Line Flow

SUCTION

COMPRESSOR

DISCHARGE

Fig. 32 — FP1 and FP2 Thermistor Location

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Carrier RHS, RVS, RDS006-060 Refrigerant Charging, Air Coil Fan Motor Removal, TROUBLESHOOTING and 32, and Table, a50-8163

Contents

CONTENTS SAFETY CONSIDERATIONSInstallation, Start-Up,and Service Instructions AQUAZONEINSTALLATION GENERALSTORAGE - If the equipment is not needed immediately 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 high. Do not remove any equipment from its shipping package until it is needed for installation UNIT 50RHC,RVC UNIT 50RHR,RVR Fig. 1 - 50RHC Dimensional Data Fig. 2 - 50RHR Dimensional Data LEFT RETURNRIGHT RETURN Water Unit Hanger DetailFig. 3 - 50RHS Dimensional Data UNIT HANGER ISOLATION DETAIL Fig. 5 - 50RVC Dimensional Data AIRFLOW CONFIGURATIONCode ReturnFig. 6 - 50RVR Dimensional Data Fig. 7 - 50RVS Dimensional Data a50-8169Fig. 8 - 50RDS Dimensional Data ht Return/Bottom DischargeReturn/Bottom Discharge Isometric ViewFig. 9 - Typical Vertical Installation Fig. 10 - Typical Downflow Installation50RVC,RVR,RVS Units 50RDS UnitsStep 4 - Mounting the Unit Factory InstalledFig. 12 - Conversion Right Return Side Discharge to Back DischargeStep 6 - Condensate Drain Fig. 15 - Horizontal Unit PitchFig. 16 - Trap Condensate Drain Fig. 17 - Vertical Condensate ConnectionFig. 18 - Typical Ground-WaterPiping Installation Table 4 - Water Quality GuidelinesStep 8 - Field Power Supply Wiring Step 9 - Field Control Wiringa50-8160 a50-8161 a50-8153 a50-8154 Line Voltage Power Connection Fig. 24 - Low Voltage Field WiringFig. 26 - Typical D Control Accessory Wiring a50-8162Table 5 - 50RHC,RVC Electrical Data Table 6 - 50RHR,RVR Electrical Data PRE-START-UP Table 7 - 50RDS, RHS, RVS Electrical DataCONNECT THE BLUE WIRE TO H FOR HIGH SPEED FAN MEDIUM FACTORY SETTING H M L FAN MOTORM FOR MEDIUM SPEED FAN L FOR LOW SPEED FAN BLU Fig. 27 - 50RHC,RVC Blower Speed SelectionTable 9 - 50RHC,RVC Blower Performance Table 11 - 50RVC Blower Performance with Wet Coil Table 12 - 50RHS,RVS,RDS Blower PerformanceC Control Jumper Settings See Fig D Control Jumper Settings See FigFIELD SELECTABLE INPUTS Table 13 - 50RHS, RVS Blower Performance with HWRTable 14 - DIP Switch Block S2 Accessory 1 Relay OptionsTable 15 - DIP Switch Block S2 Accessory 2 Relay OptionsD Control Accessory Relay Configurations START-UPFig. 28 - HWR Schematic Table 17 - HWR Operating ModesOperating Limits Unit Start-UpCooling ModeTable 20 - Water Temperature Change Table 18 - Operating Limits - 50RHC,RVC UnitsUnit Start-UpHeating Mode Table 22 - 50RHR,RVR Coaxial Water Pressure Drop Table 23 - 50RHS,RVS,RDS CoaxialWater Pressure Drop Table 24 - 50RHC,RVC Coaxial Water Pressure DropOPERATION Units with Aquazone Complete C ControlUnits with Aquazone Deluxe D Control Table 25 - Approximate Fluid Volume galUnits with HWR Option SYSTEM TESTStatus and Alarm Relay Operations Fault DescriptionsSERVICE Aquazone Deluxe D Control LED IndicaFig. 29 - Gravity Flow Method Fig. 30 - Forced Circulation MethodTROUBLESHOOTING Fig. 31 and 32, and Table Refrigerant ChargingAir Coil Fan Motor Removal Fig. 31 - Thermistor Nominal ResistanceTable 30 - Troubleshooting Table 30 - Troubleshooting cont I.PRE-START-UP 50RHC,RVC,RHR,RHS,RVR,RVS,RDS START-UPCHECKLISTII.START-UP HEATING CYCLE ANALYSIS COOLING CYCLE ANALYSISFLOW RATE GPM TEMP. DIFF. DEG. F