Water Furnace SAH Series Installation Manual page 17

Wiring Schematics cont.
SAH Air Handler Control Option A Schematic
Yellow
Thermostat
R
C
Y1
Y2
W
O
G
L1
Notes:
1 – To operate in 208V mode replace the blue transformer
wire connected to PB-L2 with red transformer wire.
2 – Low voltage wiring CLASS 2.
208-230/60/1
L1 L2 G
Transformer L1 L2
PB
Black
24V
Red NOTE 1
Blue
Black
Blk/Wh
Grn/Yel
TB
Red
R
Blue
C
Y1
Tan
Y2
W1
O
G
L
S
X1
X2
FL1
HE1
TS1
Air Handler 5kW Electric Heat
Blue
Blue
RELAY R1
White
Yellow
Yellow
Blue
Brown
C
5 Speed
1 ECM
Blower
2
Motor
3
4
5
L N G
Grey
Legend
Factory Low voltage wiring
Factory Line voltage wiring
Field low voltage wiring
Field line voltage wiring
EHC
Optional block
DC Voltage PCB traces
Internal junction
Quick connect terminal
1 2 3
TS
Thermal Limit Switch
P
Field wire lug
L1
PB -
Ground
N.O., N.C.
HE -
ER1 to ER4 - Aux heat stage relays
17
SAH AIR HANDLER INSTALLATION MANUAL
1
2
3
Orange
Blue
White
G Light emitting diode - Green
208-230V Relay coil
EHC Electric Heat Contactor
Polarized connector
Power block
Heater element
Breaker
97P901-02