8
WIRING DIAGRAMS
(CONT’D)
Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C, VW-1,12 AWG;
C
S
A TEW 600V, 105°C, FT1, 12 AWG.
Low voltage wiring:
s
ame rating
s
a
s
high voltage
except 18 AWG.
Critic
a
l Ch
a
r
a
cteri
s
tic
s
1. If any of the original wire, a
s
s
upplied, mu
s
t be
replaced, u
s
e the
s
ame equivalent wire. Wiring
mu
s
t comply with applicable code
s
, ordinance
s
and regulation
s
.
2. Field wiring mu
s
t comply with applicable code
s
,
ordinance
s
and regulation
s
. U
s
e only Cla
ss
1
wiring in
s
ide furnace compartment
s
.
For the
us
e of
a
two-
s
t
a
ge he
a
t thermo
s
t
a
t or
a
n o
u
tdoor thermo
s
t
a
t, connect
b
etween W1
a
nd W2. M
a
ke
su
re th
a
t the
S
e
as
on
S
elect
s
witch i
s
s
et to the
“
Mild
”
Po
s
ition.
HI BLACK
MED-HIGH
BLUE
MED-LOW
YELLOW
LOW RED
FAN MOTOR
S
PEED COLOR
WIRING COLOR CODE
BLK BLACK
BLU BLUE
BRN BROWN
GRN GREEN
GRY GREY
ORG ORANGE
PNK PINK
PPL PURPLE
RED RED
WHT WHITE
YEL YELLOW
LEGEND
F1 F
us
e
E He
a
ting Element
KC He
a
ting Element
Rel
a
y
K F
a
n Rel
a
y
HTL A
u
to-Re
s
et
Therm
a
l Protector
MRHTL M
a
n
ua
l Re
s
et
Therm
a
l Protector
M F
a
n Motor
TB Termin
a
l Block
T Tr
a
n
s
former Cl
ass
2
HEAT He
a
t
L1, L2
240 V Line
Su
pply
N Ne
u
tr
a
l
HEAT 4
E
HTL
KC4
KC3
HEAT 3
HEAT 1
HEAT 2
KC2
KC1
K7
24
V
A
C
24 VAC
COMMON OUT
FUSED 24VAC
POWER OUT
CALL FOR FA
CALL FOR COOL
REVERSING VALVE
CALL FOR HEAT 1
CALL FOR HEAT 2
CALL FOR COOL 1
BOARD POWER
SUPPLY
POWER
HEAT
1
HEA
T
2
HEAT
3
HE
A
T
4
VOUT
GN
D
24VDC
24VDC
24VDC
24VDC
E
HTL
E
HTL
E
HTL
G
L1
COM
NO
COM
NO
COM
NO
COM
NO
Class 2 Transformer
Pri: 240 V 60 Hz
Sec: 24 V 60 Hz 40 VA
YEL
YEL
RED
BLK
RED
BLK
BLK
BLK
BLK
RED
K
L
B
D
E
R
BLK
BLK
BLK
HEAT 4
HEAT 3
HEAT 2
HEAT 1
PNK
BRN
GRY
YEL
WHT
WHT
WHT
BLK
PPL
VENTILATION SPEED
MED-LO
LO
24VDC
4
6
2
5
1
3
PNK
RED
YEL
BLU
BLU
ORG
WHT
P2
P1
GRY
PNK
TB
T
HEAT INDICATOR
SEASON SELECT
GRY
PPL
PPL
PPL
BLK
BLK
BLK
BLK
BLK
BLK
BLK
RED
NC
YEL
PPL
X13
C
O
M
X
13 H
E
A
T
X
1
3 CO
O
L
XF
M
R
L1
L1
L2
C
O
M
L2
L2
BLK (HI)
BLU (MED-HI)
RED (LO)
YEL (MED-LO)
WHT
5
4
3
2
1
N
G
L
C
M
BLK
BLK
RED
RED
ORG
BLK
P2-8
P2-4
P2-3
P2-2
P2-1
P2-5
P2-6
P2-7
NC
C=COM
L=LINE
G=GROUND
N=NEUTRAL
1=LO
2=MED HI
3=MED HI
4=HI
5=HI
M
18/20 kW 240 VAC
Single phase
N
L2
RED
RED
RED
RED
RED
RED
Y1
W2
W1
O
Y/
Y2
G
R
C
BLK
F1
5 AMPS
P3
P3-1 P3-2
P3-3
P3-4 P3-5 P3-6 P3-7
WHT
GRY
BRN
PNK
PPL
Open: 93.3°C (200°F)
MRHTL2
WHT
WHT
WHT
WHT
MRHTL1
WHT
WHT
WARNING
Risk of electric shock. Disconnect power before installation, servicing, maintenance or field wiring. Replace all panels before
operating. Failure to do so can result in electric shock causing severe injuries or death.
!
