Lennox CBX25UH Installation Instructions Manual page 14

PART NO. 067203400
CIRCUIT BREAKER 2
L1B
L2B
220
208/240
VOLTAGE
BY OTHERS
L1A
L2A
TO BLOWER
GROUND LUG
2
1
2
1
TRANSFORMER
24
COM
208V
240V
C
120V
OR
220V
# FACTORY SPEED SET TO MEDIUM (BLUE) FOR -018, -024, -030, -036,
-042, AND -060. FACTORY SPEED SET TO LOW (RED) FOR -048
Figure 18. Typical Wiring Diagram — CBX25UH Air Handler with Electric Heat
WIRING DIAGRAM - ELECTRIC HEAT
SEQUENCER 2
12 BLK
3
4
12 BLK
1
2
GND.
18 BLU
SEQUENCER 1
CIRCUIT
BREAKER 1
5 6
12 BLK
3
4
12 BLK
14 RED 1
2
12 YEL
12 YEL
GND
4
3
3 4
18 RED
18 BLU
3 5
1
2
TIME DELAY
BLOWER REALY
1
3
5
6
14 BLUE (MED)
4 2
14 RED(LO)
14 BLK(HI)
14 YEL(COM)
USE COPPER CONDUCTORS
2nd STAGE
18 BLK
LS3
12 BLK
12 BLK
LS4
***SEQ4
1 2
12 YEL
12 YEL
4
12 YEL 3
12 YEL
1st STAGE 1st STAGE
LS1
12 BLK
LS2
12 BLK
***SEQ3
1 2
3 4
18 WHT
6-PIN
6
5
PLUG
5 6
18 BLK
W2
BLK
18 WHT
W1
WHT
18 BLU
C
BLU
18 GRN
G
GRN
18 RED
R
RED
#
BLUE
4 BRN/WHT
RED
3
MTR
BLK
BRN
2
+
YEL
1
WARNING
ONLY
Page 14
HEATERS USED
5 KW = HE1
7.5 & 10 KW = HE1 & HE2
15 KW = HE1,HE2 & HE3
20 KW = HE1,HE2,HE3 & HE4
TB = TERMINAL BLOCK
CB = CIRCUIT BREAKER
SEQ = SEQUENCER
GND = GROUND LUG
LS = LIMIT SWITCH
HE = HEATER ELEMENT
POWER (FACTORY WIRED)
POWER (FIELD WIRED)
CONTROL (FACTORY WIRED)
CONTROL (FIELD WIRED)
CONTROL CIRCUIT WIRING TO
BE 24 VOLT, N.E.C. CLASS 2
THREE POLE SEQUENCER
TIMING - SEC
PLUG PIN
LOCATION
1 1 2 2
3 3
TWO POLE SEQUENCER
4 4 5 5 6 6
**
TD = TIME DELAY (OPT.)
TR = TRANSFORMER
BR = BLOWER RELAY
MTR = BLOWER MOTOR
CAP = MOTOR CAPACITOR
GND = GROUND CONNECTION
*** SEQUENCER USED: WIRED AS SHOWN
RELAY USED: WIRED PER RELAY POLE
TO BREAK CIRCUIT
NO DEVICE PRIOR TO 10-15-2014
WIRING DIAGRAM: NO HEAT
WIRE NUTS
BY OTHERS
GND
L2 OR
CAP
1 2
TO
6-PIN
PLUG
GROUND LUG
(OPT.)
(OPT.)
ON
OFF
1-20
40-110
20-60
1-30
20-60
1-30
TIMING - SEC
ON
OFF
30-90
1-30
30-90 1-30
L1
15 AMP
NEUT.
SUPPLY
VOLTAGE