If pressure and temperature do not match on chart, system
refrigerant charge may not be correct or other system ab-
normalities may exist. Do not use table to adjust refrigerant
charge.
When recharging is necessary during heating season, weigh
in total charge as indicated in separate indoor unit installa-
tion instructions. Remove any refrigerant remaining in sys-
tem before recharging. If the system has lost complete charge,
evacuate and recharge by weight. Service port connections
are provided on liquid and suction line service valves. For
evacuation and recharging, Dial-a-Charge charging cylin-
der, or similar device, is an accurate device for recharging
systems by weight.
MAINTENANCE
Before performing recommended maintenance, be sure
unit main power switch is turned off. Failure to do so
may result in electric shock or injury from rotating fan
blade.
Lubrication
COMPRESSOR — Compressor contains factory oil charge;
replace oil when lost. See Table 1 for oil recharge and refer
to Carrier Standard Service Techniques Manual, Chapter 1,
page 1-21, for oil recharging procedure. Use Carrier PP33-1,
Texaco WF-32 or Suniso 3GS oil.
FAN-MOTOR BEARINGS — Oiling holes are provided at
each end of condenser fan motor. Remove fan motor and
lubricate motor with 32 drops (16 drops per hole) of SAE-10
nondetergent oil at intervals described below:
• Annually, when environment is very dirty, ambient tem-
perature is higher than 105 F, and average unit operating
time exceeds 15 hours a day, or
• Every 3 years when environment is reasonably clean, am-
bient temperature is less than 105 F, and unit operating
time averages 8 to 15 hours a day, or
• Every 5 years when environment is clean, ambient tem-
perature is less than 105 F, and unit operating time aver-
ages less than 8 hours a day.
Cleaning
CLEANING COILS —
Coils should be washed out with water, or blown out with
compressed air. Note that the blow-thru design causes dirt
and debris to build up on the inside of the coils.
Clean coil annually or as required by location or outdoor
air conditions. Inspect coil monthly, and clean as required.
Fins are not continuous through coil sections. Dirt and de-
bris may pass through first section, become trapped between
the row of fins and restrict condenser airflow. Use a flash-
light to determine if dirt or debris has collected between coil
sections. Clean coil as follows:
1. Turn off unit power.
2. Using a garden hose, or other suitable equipment, flush
coil from the outside to remove dirt. Be sure to flush all
dirt and debris from drain holes in base of unit. Fan mo-
tors are waterproof.
Table 5 — Heating Operation Pressure Table, Fixed Restrictor (High Pressure at Suction Valve, Low Pressure
at Liquid Valve, Suction Pressure at Compressor)
UNIT
38QR
INDOOR
DRY
BULB
TEMP (F)
OUTDOOR TEMPERATURE (F) DRY BULB
UNIT
38QR
INDOOR
DRY
BULB
TEMP (F)
OUTDOOR TEMPERATURE (F) DRY BULB
60
50
40
30
20
10
0
60
50
40
30
20
10
0
018C
60
HIGH
219.8 199.2 181.4 166.0 152.5 139.7 128.4
036C
60
HIGH
226.0 205.4 188.0 172.9 160.0 148.4 137.4
LOW
83.8
71.0
59.3
48.5
38.8
30.2
22.8
LOW
76.1
64.7
54.3
44.7
36.1
28.2
21.2
SUCTION
68.8
58.6
49.3
40.7
32.9
26.0
19.8
SUCTION
61.9
52.6
44.1
36.3
29.3
22.8
17.0
70
HIGH
247.7 225.6 206.4 189.5 173.5 159.4 146.5
70
HIGH
254.7 233.0 214.4 198.2 183.9 169.7 158.3
LOW
85.1
72.1
60.0
49.1
39.3
30.1
23.4
LOW
77.3
65.8
55.3
45.5
36.6
28.8
21.8
SUCTION
70.4
60.0
50.5
41.8
33.9
26.9
20.6
SUCTION
63.3
54.0
45.3
37.4
30.1
23.5
17.7
80
HIGH
278.3 254.3 233.5 214.0 196.2 180.3 165.5
80
HIGH
286.7 263.5 243.3 225.5 207.7 193.5 180.4
LOW
86.5
73.0
60.7
49.7
40.0
31.5
24.0
LOW
78.9
67.1
56.2
46.2
37.3
29.5
22.5
SUCTION
72.0
61.4
51.7
42.8
34.8
27.7
21.4
SUCTION
65.0
55.4
46.6
38.4
31.0
24.4
18.4
024C
60
HIGH
234.1 210.3 190.4 173.6 159.4 147.3 136.2
048C
60
HIGH
231.6 210.2 191.8 175.4 162.1 148.7 137.6
LOW
77.9
66.2
55.4
45.5
36.5
28.5
21.2
LOW
80.4
68.2
56.9
46.5
37.2
29.0
21.7
SUCTION
66.3
56.4
47.3
38.9
31.3
24.4
18.2
SUCTION
67.8
57.6
48.1
39.4
31.5
24.5
18.2
70
HIGH
262.0 237.0 215.8 197.8 182.5 168.9 156.3
70
HIGH
261.2 238.3 218.5 201.2 184.3 170.2 157.8
LOW
79.4
67.4
56.4
46.3
37.0
28.8
21.6
LOW
81.8
69.3
57.7
47.1
37.7
29.6
22.2
SUCTION
68.0
57.9
48.6
40.0
32.2
25.2
18.9
SUCTION
69.4
58.8
49.1
40.3
32.3
25.2
18.8
80
HIGH
292.6 265.9 243.3 224.2 207.4 191.3 178.0
80
HIGH
293.2 268.6 247.2 226.7 208.6 193.1 178.9
LOW
80.9
68.6 57.3
47.0
37.6
29.4
22.2
LOW
83.2
70.3
58.5
47.8
37.8
30.2
22.8
SUCTION
69.8
59.4
49.8
41.0
33.1
25.9
19.6
SUCTION
70.9
60.1
50.2
41.2
33.1
25.9
19.4
030C
60
HIGH
222.3 202.2 185.1 170.4 157.9 146.7 135.9
060C
60
HIGH
228.9 207.5 189.6 173.8 160.4 147.6 136.6
LOW
83.8
71.4
60.0
49.3
39.7
30.9
23.3
LOW
85.9
72.7
60.9
50.0
40.1
31.3
23.5
SUCTION
61.8
52.6
44.1
36.2
29.0
22.5
16.7
SUCTION
63.6
53.9
44.9
36.8
29.4
22.7
16.8
70
HIGH
250.9 229.6 211.2 195.4 181.6 167.8 156.6
70
HIGH
258.3 235.7 215.9 199.0 183.4 168.8 156.4
LOW
85.2
72.5
60.7
49.9
40.1
31.3
23.7
LOW
86.9
73.8
61.6
50.5
40.5
31.7
24.0
SUCTION
63.5
54.0
45.3
37.2
29.9
23.2
17.3
SUCTION
65.1
55.2
46.0
37.7
30.2
23.5
17.5
80
HIGH
282.2 259.3 239.5 222.6 205.6 191.3 178.5
80
HIGH
290.0 265.7 244.4 225.5 206.7 191.3 177.2
LOW
86.6
73.5
61.5
50.4
40.6
31.9
24.3
LOW
88.4
74.7
62.3
50.9
41.1
32.3
24.5
SUCTION
65.1
55.4
46.4
38.2
30.7
24.0
18.0
SUCTION
66.5
56.5
47.2
38.7
31.1
24.3
18.2
11
