Carrier 38CKE Wiring Diagrams

38CKE
50Hz Air Conditioner
With R---410a Refrigerant
Single and Three Phase
1---1/2 To 5 Tons
CONNECTION DIAGRAM
CONT
A1
230 1Ø
11
POWER
A2
13
SUPPLY
EQUIP
GND
*LPS
YEL/PNK YEL/PNK
R
Y G
INDOOR THERMOSTAT
-LEGEND-
FACTORY POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
FIELD POWER WIRING
COMPONENT CONNECTION
FIELD SPLICE
JUNCTION
CONTACTOR
CONT
CAPACITOR (DUAL RUN)
CAP
COMPRESSOR
COMP
*
HIGH PRESSURE SWITCH
HPS
INDOOR FAN RELAY
IFR
*
LOW PRESSURE SWITCH
LPS
OFM OUTDOOR FAN MOTOR
*
START CAPACITOR
SC
*
SR START RELAY
*
START THERMISTOR
ST
*
MAY BE FACTORY OR FIELD INSTALLED
1. Compressor damage may occur if system is overcharged.
2. This unit is factory charged with R410A in accordance with the amount shown on the rating plate. The charge is adequate for most
systems using matched coils and tubing not over 15 feet long. The best performance will be achieved when the unit operates with
a suction gas superheat at the compressor inlet of 5 ºF at normal rating conditions of the air conditioning and refrigeration institute
(ARI). This chart may be used to approximate the charge if ARI rating conditions cannot be obtained. ARI rating conditions are
equivalent to DOE test "A" conditions. See product data literature for required indoor air flow rates and for use of line lengths over
15 Ft.
3. Relieve pressure and recover all refrigerant before system repair or final unit disposal. Use all service ports and open all flow-control
devices, including solenoid valves.
Wiring Diagrams
BLK
BLU
COMP BLU
BLU
S CAP
YEL
BLK C
H
21
R
C
*SC
23
YEL YEL
F
YEL
BRN
(NOTE #8)
BLK
OFM
YEL
BRN
BLU/PNK
*HPS
BLU/PNK
BLU/PNK
BRN
C
R
IFR
INDOOR BLOWER MOTOR
-NOTES-
1. Symbols are electrical representation only.
2. Compressor and fan motor furnished with inherent thermal protection.
3. To be wired in accordance with national Electric N.E.C. and local codes.
4. N.E.C. class 2, 24 V circuit, min. 40 VA required, 60 VA on units installed with
LLS.
5. Use copper conductors only. Use conductors suitable for at least 75ºC (167ºF).
6. If indoor section has a transformer with a grounded secondary, connect the
grounded side to the BRN lead.
7. When start relay and start capacitor are installed, start thermistor is not used.
8. If any of the original wire, as supplied must be replaced, use the same or
equivalent wire.
9. Check all electrical connections inside control box for tightness.
10. Do not attempt to operate unit until service valves have been opened.
11. Do not rapid cycle compressor. Compressor must be off 3 minutes to allow
pressures to equalize between high and low side before starting.
COOLING ONLY CHARGING PROCEDURE
1. Operate unit a minimum of 10 minutes before checking charge.
2. Measure suction pressure by attaching a gage to suction valve service port.
3. Measure suction temperature by attaching an accurate thermistor type or
electronic thermometer to the suction line at service valve.
4. Measure outdoor air dry-bulb temperature with a thermometer.
5. Measure indoor air (entering indoor coil) wet bulb temperature with a sling
psychrometer.
6. Refer to table I. Find outdoor temperature and evaporator entering air wet-bulb
temperature, at this intersection note the superheat.
7. Refer to table II. Find superheat temperature located in step 6 and suction
pressure, at this intersection note suction line temperature.
8. If unit has a higher suction line temperature than charted temperature, add
refrigerant until charted temperature is reached.
9. If unit has a lower suction line temperature than charted temperature, remove
and recover refrigerant until charted temperature is reached.
10. If outdoor air temperature or pressure at suction valve changes, charge to new
suction line temperature indicated on chart.
11. This procedure is valid when indoor air flow is within +/- 21% of its rated cfm.
CAUTION
Fig. 1 – 38CKE018 - - 036 - -X- -7 230- -50- -1
SCHEMATIC DIAGRAM (LADDER FORM)
A1
+t
CONT
*ST
11 21
*SR
EQUIP
GND
BRN
1 2
5
*LPS
EXTERNAL
POWER
SUPPLY
24 V
Y
(NOTE #4)
G
R
INDOOR
THERMOSTAT
336011-101 REV. B
R
C
COMP
S
5 2 *SC
*ST
+t
1
H
*SR
C
OFM
F
CAP
*HPS
IFR
R C
EXTERNAL POWER SUPPLY 24 V
TABLE I-SUPERHEAT CHARGING TABLE
(SUPERHEAT °F AT LOW-SIDE SERVICE PORT)
EVAPORATOR ENTERING AIR °F WB.
OUTDOOR
50 52 54 56 58 60 62 64 66 68 70 72 74 76
TEMP °F
9 12 14 17 20 23 26 29 32 35 37 40 42 45
55
60 7 10 12 15 18 21 24 27 30 33 35 38 40 43
-- 6 10 13 16 19 21 24 27 30 33 36 38 41
65
-- -- 7 10 13 16 19 21 24 27 30 33 36 39
70
75 -- -- -- 6 9 12 15 18 21 24 28 31 34 37
-- -- -- -- 5 8 12 15 18 21 25 28 31 35
80
-- -- -- -- -- -- 8 11 15 19 22
85
-- -- -- -- -- -- 5 9 13 16 20 24 27 31
90
-- -- -- -- -- -- -- 6 10 14 18 22 25 29
95
100 -- -- -- -- -- -- -- -- 8 12 15 20 23 27
-- -- -- -- -- -- -- -- 5
105
-- -- -- -- -- -- -- -- --
110
-- -- -- -- -- -- -- -- -- --
115
TABLE II-REQUIRED SUCTION TUBE TEMPERATURE °F
(MEASURED AT LOW-SIDE SERVICE PORT)
SUCTION PRESSURE AT SERVICE PORT PSIG.
SUPERHEAT
TEMP. °F 61.5 64.2 67.1 70.0 73.0 76.0
0 35 37 39 41 43 45
2 37 39 41 43 45 47
4 39 41 43 45 47 49
6 41 43 45 47 49 51
8 43 45 47 49 51 53
10 45 47 49 51 53 55
12 47 49 51 53 55 57
14 49 51 53 55 57 59
16 51 53 55 57 59 61
18 53 55 57 59 61 63
20 55 57 59 61 63 65
22 57 59 61 63 65 67
24 59 61 63 65 67 69
26 61 63 65 67 69 71
28 63 65 67 69 71 73
30 65 67 69 71 73 75
32 67 69 71 73 75 77
34 69 71 73 75 77 79
36 71 73 75 77 79 81
38 73 75 77 79 81 83
40 75 77 79 81 83 85
A2
CONT
23
13
CONT
26 30 33
9 13 17 22 26
6 11 15 20 25
8 14 18 23
79.2 82.4 85.7
47 49 51
49 51 53
51 53 55
53 55 57
55 57 59
57 59 61
59 61 63
61 63 65
63 65 67
65 67 69
67 69 71
69 71 73
71 73 75
73 75 77
75 77 79
77 79 81
79 81 83
81 83 85
83 85 87
85 87 89
87 89 91