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2. Measure liquid service-valve pressure by attaching an
accurate gage to the service port.
3. Measure the liquid-line temperature by attaching an accu-
rate thermistor-type or electronic thermometer to the liquid
line near the outdoor coil.
4. Refer to unit-rating plate to find required subcooling
temperature for units produced during or after January
1993. For units produced through December 1992, refer to
Table 23. Find the point at which the required subcooling
temperature intersects the measured liquid service-valve
pressure on Table 24.
5. To obtain the required subcooling temperature at a specific
liquid-line pressure, add refrigerant if liquid-line tempera-
ture is higher than indicated or remove refrigerant if
temperature is lower. Allow a tolerance of 3°F.
CARE AND MAINTENANCE
To assure high performance and minimize possible equipment
malfunction, it is essential that maintenance be performed periodi-
cally on this equipment. The frequency with which maintenance is
performed is dependent on such factors as hours of operation,
geographic location, and local environmental conditions.
WARNING: Disconnect all electrical power to unit
before performing any maintenance or service on outdoor
unit. Remember to disconnect power supply to air handler
as this unit supplies low-voltage power to the outdoor
unit. Electric shock can cause personal injury or death.
The minimum maintenance that should be performed on this
equipment is as follows.
1. Check outdoor coil for cleanliness each month during the
heating (heat pump only) or cooling season and clean as
necessary, but clean at least once each heating (heat pump
only) and cooling season.
2. Check fan motor and blade for cleanliness each heating and
cooling season and clean as necessary.
TABLE 23—SUBCOOLING AT LIQUID-SERVICE VALVE FOR UNITS PRODUCED THROUGH DECEMBER, 1992
RELIANT AIR CONDITIONERS
Model 590A 591A/592A 593A/594A 593B 593C 594C 595A 596A 597A 597B
598A
High
598A
Low
Series ABCABCDABCDABABABAAAAAA
014 14 14 — 14 14 14 — 66——————————————
018 17 17 — 14 14 14 — 77——11 — 99—— 98————
024 13 13 — 17 17 17 — 88——13 — 16 21 12 — 13 12 11 13 ——
030 15 15 — 91010— 6 6 10 13 11 — 15 15 14 — 10 9 10 11 ——
036 13 12 — 16 16 16 — 12 12 5 — 9 — 13 12 16 — 14 13 12 14 12 9
038 ———————————16 ———————————
042 13 13 14 16 19 19 15 12 12 ——11 — 13 — 21 — 11 11 15 15 ——
048 15 14 — 18 14 18 — 14 14 ——18 — 17 — 14 — 10 10 11 11 12 9
060 19 22 — 18 18 18 — 14 14 ——11 — 16 — 19 —— — 12 11 12 9
RELIANT HEAT PUMPS
Model 690A 691A/692A 693A/694A 693B 693C 694C 697A 697B
698A
Cooling Heating
High Low High Low
Series ABCDABABA A A A AAAAA
014 777—————— — — — —————
018 18 18 18 — 16 16 11 11 10 9 7 9 10 ————
024 18 18 18 — 16 16 11 11 13 6 5 11 11 ————
030 13 13 13 — 20 20 10 10 11 10 10 9 10 ————
036 18 18 18 — 14 14 10 10 11 13 12 9 10 12 7 18 15
042 13 11 11 — 18 18 15 15 12 10 12 11 12 ————
048 22 17 15 14 19 14 13 13 — 15 12 10 11 14 9 25 18
060 23 23 23 — 13 13 14 14 — 15 10 12 7 14 9 22 21
MODEL
CUBE UNIT—AIR CONDITIONERS CUBE UNIT—HEAT PUMPS HORIZONTAL AIR CONDITIONERS
561A/571A 661A/671A 566D 566E
Series ABABCDA
014 ————10 ——
018 15 16 11 14 12 — 17
024 14 11 14 8 —— 19
030 12 12 9 10 — 12 —
036 18 16 11 7 —— —
042 18 17 7 ————
048 — 17 12 ————
060 — 21 10 ———
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