Typical Wiring Diagram — Cbx25Uhv Air Handler With Electric Heat - Lennox Merit CBX25UHV Installation Instructions Manual

SYSTEM
SINGLE STAGE AIR CONDITIONER
TWO−STAGE AIR CONDITIONER
SINGLE STAGE HEAT PUMP
TWO−STAGE HEAT PUMP
TWO−STAGE ELECTRIC HEAT
TO ACTIVATE DEHUMIDIFICATION
PART NO. 104796−01
CIRCUIT BREAKER 2
L1B
L2B
GND.
220
208/240
CIRCUIT
VOLTAGE
BREAKER 1
BY OTHERS
L1A
L2A
GND
TO BLOWER
GROUND LUG
1 2
2 3 4
1
14 YEL
TR
C
COM
208V
240V
R
14 BLK
W2
W2
Figure 21. Typical Wiring Diagram — CBX25UHV Air Handler with Electric Heat
FIELD JUMPERS
NEED ALL
REMOVE Y1 TO Y2
REMOVE R TO O
REMOVE Y1 TO Y2 AND R TO O
REMOVE W1 TO W2
REMOVE R TO DS
WIRING DIAGRAM − ELECTRIC HEAT
SEQ 2
18 BLK
12 BLK
4
12 BLK 3
12 BLK
12 BLK
2
1
1
12 YEL
3
12 YEL
SEQ 1
12 BLK 5 6
12 BLK
12 BLK
3
4
12 BLK
14 RED
1
2
12 YEL
12 YEL
3 4 5 6
5 6
18 WHITE
1
18 WHITE
2
18 WHITE
3
18 WHITE
4
18 WHITE
5
18 YELLOW
6
1
18 WHITE
7
BR
2
18 WHITE
8
3
18 ORANGE
9
4
18 PURPLE
10
5
18 WHITE
11
14 YEL
18 WHITE
18 GRN
12
13
14
GRD
15
16
R Y2 DS O
C W1 W2
W1
G
O R
G
W1 O
Page 15
WARNING
USE COPPER CONDUCTORS ONLY
2nd STAGE
LS3
7.5 & 10 KW = HE1 & HE2
LS4
2
***SEQ4
TB = TERMINAL BLOCK
4
CB = CIRCUIT BREAKER
SEQ = SEQUENCER
GND = GROUND LUG
1st STAGE 1st STAGE
LS = LIMIT SWITCH
POWER (FACTORY WIRED)
LS1
POWER (FIELD WIRED)
CONTROL (FACTORY WIRED)
LS2 CONTROL (FIELD WIRED)
CONTROL CIRCUIT WIRING TO
***SEQ3
BE 24 VOLT, N.E.C. CLASS 2
1 2
3
4
18 BLK
PLUG PIN
LOCATION
6−PIN
PLUG 1 1
4 4
**
18 RED
18 BLUE
1
18 YEL
2
3
4
*** SEQUENCER USED: WIRED AS SHOWN
5
RELAY USED: WIRED PER RELAY POLE
TO BREAK CIRCUIT
6
NO DEVICE PRIOR TO 10−15−2014
7
8
9
10
11
12
13
14
15
18 WHITE
18 WHITE
1
6−PIN
PLUG
G
Y1
GND
Y1
C
DS
DS
C Y1
R
HEATERS USED
5 KW = HE1
15 KW = HE1,HE3 & HE4
(OPT.)
(OPT.)
THREE POLE SEQUENCER
TIMING − SEC
ON OFF
1−20 40−110
20−60
1−30
20−60
1−30
TWO POLE SEQUENCER
TIMING − SEC
2 2 3 3
ON OFF
30−90 1−30
5 5 6 6
30−90 1−30
TD = TIME DELAY (OPT.)
TR = TRANSFORMER
BR = BLOWER RELAY
MTR = BLOWER MOTOR
CAP = MOTOR CAPACITOR
GND = GROUND CONNECTION
WIRING DIAGRAM: NO HEAT
WIRE NUTS
BY OTHERS
L1
15 AMP
L2 OR
NEUT .
SUPPLY
VOLTAGE
2
GRD
Y2
Y2
®
MERIT CBX25UHV SERIES