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Whirlpool WHP44 Installation Instructions Manual page 9

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For line set lengths greater than 15 ft (4.6 m), add refrigerant
by weighing in 0.60 oz per ft of ³⁄₈" (1 cm) O.D. liquid line or
0.23 oz per ft of ¹⁄₄" (6.4 mm) O.D. liquid line.
If necessary, adjust the refrigerant charge for compatibility
with the evaporator coil.
Charge Verification
NOTES:
Do not overcharge the system with refrigerant.
Operating the compressor with the suction valve closed will
void the warranty and cause serious compressor damage.
CAUTION
Goodman 20
Prolonged operation at suction pressures less than
20 psig for more than 5 seconds will result in overheating
of the scrolls and permanent damage to the scroll tips,
drive bearings and internal seal.
CAUTION
Goodman 29
Operating the compressor with the suction valve closed
will void the warranty and cause serious compressor
damage.
CAUTION
Use refrigerant certified to ARI standards. Used
refrigerant may cause compressor damage, and will void
the warranty. Most portable machines cannot clean used
refrigerant to meet ARI standards.
NOTE: Superheat Formula = Suction Line Temperature - Saturated Suction Temperature
System Superheat
Return Air Temperature—ºF (ºC) 50% RH
Ambient
Dry-Bulb Wet-Bulb Dry-Bulb Wet-Bulb Dry-Bulb Wet-Bulb Dry-Bulb Wet-Bulb Dry-Bulb Wet-Bulb
Condenser Inlet
Temperature—ºF
65 (18)
(ºC) Dry-Bulb
115 (46.1)
100 (37.8)
95 (35)
90 (32.2)
85 (29.4)
80 (26.7)
75 (23.9)
70 (21.1)
65 (18)
60 (15.6)
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Flooded region
Goodman 27
54 (12.2) 70 (21.1) 58 (14.4) 75 (23.9) 63 (17.2) 80 (26.7) 67 (19.4) 85 (29.4) 71 (21.7)
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NOTICE
Goodman 28
Violation of EPA regulations may result in fines or other
penalties.
1. Check that the outdoor temperature is 60ºF (15.6ºC) or
higher.
2. Set the room thermostat to COOL.
3. Set the fan switch to AUTO.
4. Set the temperature control well below the room temperature.
5. After the system has stabilized according to the start-up
instructions, check the subcooling and superheat. See
"Charge by System Superheat—Fixed Orifice Metering" and
"Charge by System Subcooling—TXV Metering."
Charge by System Superheat—Fixed Orifice Metering
1. Purge the gauge lines.
2. Connect the service gauge manifold to the base-valve service
ports.
3. Run the system at least 10 minutes to allow the pressure to
stabilize.
4. Temporarily install a thermometer on the suction (large) line
within 4" to 6" (10.2 cm to 15.2 cm) of the compressor. Check
that the thermometer makes adequate contact. Insulate the
thermometer for the best possible reading.
NOTE: An optional, less accurate, method is to locate the
thermometer at the suction line service valve. Check that the
thermometer makes adequate contact and is insulated.
5. Refer to the following System Superheat table for proper
system superheat. Add charge to lower superheat or recover
charge to raise superheat.
6. Disconnect the manifold set. Installation is now complete.
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