The Space-Pak system has been designed to provide
years of trouble-free performance in normal installations.
Examination by the homeowner at the beginning of each
cooling season, and in mid-season should assure
continued, good performance. In addition, the system
should be examined by a qualified service professional at
least once every year.
BEFORE EACH COOLING SEASON
1. Check and clean air filter. The air filter is permanent
type. Remove and clean thoroughly with soap solution
and water.
2. Check fan coil unit. Turn off unit power disconnect
switch and remove service access panels.
a. Inspect evaporator coil and blower wheel for build-
up of dust and dirt. Clean with solvent and/ or water as
necessary.
b. Replace service access panels and turn on unit
power disconnect switch.
18
NOTE: Do not introduce refrigerant liquid to system
through suction port. Liquid in the suction line may
damage the compressor.
4. If superheat is too low, slowly bleed refrigerant from
suction line service port into an appropriate refrigerant
recovery device.
Watch pressure gauge and
thermometer for correct superheat.
CAUTION: Releasing refrigerant gas into the
atmosphere is a criminal offense.
It is important that the system be properly charged to
avoid an overcharged system, but also to ensure that the
system operates as efficiently as possible and delivers
full capacity.
SECTION 4: MAINTENANCE
3. Check that unit condensate drain is clear and free
running, and plug is in cleanout.
4. For outdoor condensing unit, follow manufacturer’s
maintenance instructions.
5. Follow “System Start-Up & Adjustments” procedures
in Section 3 of this manual.
IF SYSTEM FAILS TO OPERATE
1. Check that thermostat switch is set for proper mode
of operation and is set below room temperature.
2. Check that outdoor unit is operating.
3. Check for tripped circuit breaker or blown fuse at either
the main fuse box or at unit disconnect box on or near
the condensing unit. Replace blown fuse with same size
and type.
FIGURE 3.1: R-22 SUPERHEAT TABLE
Measured Corresponding
Superheat
Values
(F)
Suction
Saturation 6
8
10
12
14
16
18
20
Pressure (PSIG)
Temperature (F)
Measured Suction Line Temperatures (F)
60
34
40
42
44
46
48
50
52
54
62
35
41
43
45
47
49
51
53
55
64
37
43
45
47
49
51
53
55
57
66
38
44
46
48
50
52
54
56
58
68
40
46
48
50
52
54
56
58
60
70
41
47
49
51
53
55
57
59
61
72
42
48
50
52
54
56
58
60
62
74
44
50
52
54
56
58
60
62
64
76
45
51
53
55
57
59
61
63
65
78
46
52
54
56
58
60
62
64
66
80
48
54
56
58
60
62
64
66
68
85
51
57
59
61
63
65
67
69
71
90
54
60
62
64
66
68
70
72
74
95
56
62
64
66
68
70
72
74
76
100
59
65
67
69
71
73
75
77
79
