16
Fig. 13 — 42WKN Unit 2-Pipe Heating/Cooling Changeover with Microprocessor Control Wiring Diagram,
230v, Sizes 08 and 12
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
J
CONTROL TRANSFORMER
240V PRI, 24V SEC 40VA CLASSII
BLACK
YELLOW
O
RANGE
BLUE
24V
230V
208-230V / 1PH / 50-60HZ
INCOMING POWER
AND GROUND
BY OTHERS
MAIN
GROUND
DISCONNECT
SWITCH
L3
L4
(OPTIONAL)
FAN
H
M
L
(BLUE)
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
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)
WATER
VALVE
12
WTR-1
WTR
VALVE RELAY
(230V)
65
L1
T
WATER COIL
TEMP SENSOR
T
INLET
PIPING
TEMP
SENSOR
(Changeover)
JP3
JP2
JP1
A1
A2
14
11
A1
A2
11
12
1.25A
FUSE
1.25A
FUSE
L1
202
14 AWG BLACK
NC
COM
NC
COM
NC
COM
OPTIONAL COMPONENT
SMALL CASSETTE
CHILLED WATER 2 POSITION
MICROPROCESSOR CONTROLS
CHANGEOVER
C
L1
L1
L1
202
L1
202
J12
(INTERNAL)
WALL
MOUNTED
THERMOSTAT
17 16 15
(ETN/MIGA/F)
(OPTIONAL)
W
(BLUE)
FAN MOTOR WIRE COLORS
BLACK
FASTEST
SIZE
H
M
L
H
M
L
2/8
A/C/H
WHITE
RED
GREY
ORANGE
FILTER
VOLTAGE
B/J
MERV (B)
H
M
L
H
M
L
2/12
A/C/H B/J/K
H
M
L
A/B/C/H/J/K
STD (A)
K
H
M
L
STD (A)
MERV (B)
H
M
L
A/B/C/H/J/K
5H104889-1223
