Bryant R-22 User Manual
Page 45

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
A
B
C
A
B
C
D
A
B
C
D
A
B
A
B
A
B
A
A
A
A
A
A
014
14
14
—
14
14
14
—
6
6
—
—
—
—
—
—
—
—
—
—
—
—
—
—
018
17
17
—
14
14
14
—
7
7
—
—
11
—
9
9
—
—
9
8
—
—
—
—
024
13
13
—
17
17
17
—
8
8
—
—
13
—
16
21
12
—
13
12
11
13
—
—
030
15
15
—
9
10
10
—
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
A
B
C
D
A
B
A
B
A
A
A
A
A
A
A
A
A
014
7
7
7
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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
A
B
A
B
C
D
A
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
—
—
—
—45—