18
Fig. 15 — 42WKN Unit 2-Pipe Cooling Only or 4-Pipe System with Microprocessor Control Wiring Diagram,
115v, 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
240V PRI, 24V SEC 40VA CLASSII
BLACK
YELLOW
ORANGE
BLUE
24V
230V
(X1)
(230V)
STEP UP
TRANSFORMER
(250VA)
(X4)
(X3)
(X2)
(H1)
(H4)
(H3)
(H2)
(115/110V)
LP
L
3.5A
FUSE
110-115V / 1PH / 50-60HZ
INCOMING POWER
AND GROUND
BY OTHERS
MAIN
GROUND
L3
L2
DISCONNECT
SWITCH
N
N
(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)
L1
202
(OPTIONAL)
HW
VALVE
13
HTR-1
(24V N/O)
(24V N/C)
CW
VALVE
12
CLR-1
CLR
COOL RELAY
(230V)
65
L1
HTR
HEAT RELAY
(230V)
63
L1
(OPTIONAL)
A1
A2
A2
A1
14
11
12
11
14 AWG BLACK
JP3
JP2
JP1
A1
A2
14
11
NC
COM
NC
COM
NC
COM
OPTIONAL COMPONENT
MEDIUM CASSETTE
CHILLED WATER 2 POSITION
MICROPROCESSOR CONTROLS
WITH OPTIONAL HOT WATER
L1
L1
L1
202
L1
202
J12
WALL
MOUNTED
THERMOSTAT
17 16 15
(ETN/MIGA/F)
(OPTIONAL)
14 AWG BLACK
2.0A
FUSE
2.0A
FUSE
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)
5H104890-1201
