22
Fig. 19 — 42WKN Unit 2-Pipe Cooling Only with Electric Heat, Microprocessor Control Wiring Diagram,
208v, Sizes 18 and 20
WIRING LEGEND
WARNING
IMPORTANT
FACTORY INSTALLED
FIELD INSTALLED
TERMINAL BLOCK
COMPONENT TERMINAL
CONNECTED PATH
PLUG AND SOCKET
WIRING DIAGRAM
REV
1) DISCONNECT POWER SUPPLY BEFORE MAKING
CONNECTIONS TO PREVENT ELECTRICAL SHOCK AND
EQUIPMENT DAMAGE. 2) ALL UNITS MUST BE WIRED
STRICTLY IN ACCORDANCE WITH WIRING DIAGRAM
FURNISHED WITH THE UNIT. ANY WIRING DIFFERENT
FROM THE WIRING DIAGRAM COULD RESULT IN A
HAZARD TO PERSONS AND PROPERTY. 3) ANY ORIGINAL
FACTORY WIRING THAT REQUIRES REPLACEMENT
MUST BE REPLACED WITH WIRING MATERIAL HAVING A
TEMPERATURE RATING OF AT LEAST 105°C.
INSTALLATION OF WIRING MUST CONFORM
WITH LOCAL BUILDING CODES OR IN THE
ABSENCE OF LOCAL CODES, OF THE
NATIONAL ELECTRICAL CODE ANSI/NFPA 70
- LATEST EDITION. UNIT MUST BE
ELECTRICALLY GROUNDED IN
CONFORMANCE TO THIS CODE. IN CANADA,
WIRING MUST COMPLY WITH CSA C22.1,
PART 1, ELECTRICAL CODE.
230V LINE WIRING: USE COMPONENT LEADS OR 14 AWG BLACK UNLESS NOTED
24V CONTROL WIRING: USE COMPONENT LEADS OR 18 AWG WHITE
1
I
CONTROL TRANSFORMER
208V PRI, 24V SEC 40VA CLASSII
BLACK
YELLOW
RED
BLUE
24V
208V
208-230V / 1PH / 50-60HZ
INCOMING POWER
AND GROUND
BY OTHERS
MAIN
GROUND
DISCONNECT
SWITCH
L3
L4
(OPTIONAL)
22
20
REMOVE LINK FOR
REMOTE SHUT DOWN.
UNIT ENABLED WHEN
JUMPERED
AL
ALARM RELAY
24
(OPTIONAL)
(L2)
(M2)
HW COIL
FREEZE STAT
FAN THERMAL
SWITCH
(YEL)
(YEL)
CONDENSATE
FLOAT SWITCH
(RED)
(BLK)
PLUG & SOCKET
CONNECTION
(BLUE)
(BROWN)
VM
VANE MOTOR
L1
202
C
T
RETURN AIR
TEMP SENSOR
AL-1
J3
Condensate
J7
J6
J4
Heat (1A)
Pump (1A)
J8
Hi Fan
Med Fan
Low Fan
J10
~
FUSE
10 A
J9
Aux
J15
Aux 1
J13
J5
J11
Compressor
(1A)
FAN (3A)
Power
Supply
Microcontroller
T1
0T
2
T3
0
0
T4
0
17
7 6
4 3 2
8/14
5/16
1/15
FASCIA
DISPLAY
PANEL
(BLUE)
CPM
CONDENSATE
PUMP
L1
FAN
H
M
L
(BLUE)
C1
(BRN)
63
20.0A
FUSE
2.0A
FUSE
14GA HI TEMP
HTR
HEAT RELAY
(230V)
55
L1
(24V N/C)
CLR
COOL RELAY
(230V)
65
L1
1.5KW ELECTRIC
HEATER
61
1.5KW ELECTRIC
HEATER
62
HTR-1
AUTO RESET
OHCO
MANUAL RESET
OHCO
AUTO RESET
OHCO
MANUAL RESET
OHCO
14 AWG BLACK
COM
NC COM
NC
COM
NC COM
NC
2
4
59
HTR-2
8
6
CW
VALVE
12
CLR-1
20.0A
FUSE
2.0A
FUSE
202
L1
14 AWG BLACK
JP3
JP2
JP1
A1
A2
14
11
14GA HI TEMP
A1
A2
0
1
14
11
NC
COM
NC
COM
NC
COM
OPTIONAL COMPONENT
MEDIUM CASSETTE
CHILLED WATER 2 POSITION
MICROPROCESSOR CONTROLS
WITH ELECTRIC HEAT
L1
L1
L1
202
L1
202
J12
WALL
MOUNTED
THERMOSTAT
17 16 15
(ETN/MIGA/F)
(OPTIONAL)
68
69
W
(BLUE)
FAN MOTOR WIRE COLORS
BLACK
FASTEST
SIZE
H
M
L
H
M
L
18
A/C/H
WHITE
RED
GREY
ORANGE
FILTER
VOLTAGE
B/J
MERV (B)
H
M
L
H
M
L
20
A/C/H B/J/K
H
M
L
A/B/C/H/J/K
STD (A)
K
H
M
L
H
M
L
H
M
L
A/C/H B/J/K
STD (A)
MERV (B)
5H104890-1212
