Water Furnace SAH Series Installation Manual page 18

SAH AIR HANDLER INSTALLATION MANUAL
Wiring Schematics cont.
SAH Air Handler Control Option A Schematic
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.
Yellow
Yellow
HE2
FL2
Blue
RELAY R1
208-230/60/1
Blue
L1 L2
G
Transformer L1
PB
Black
24V
Red NOTE 1
Blue
Yellow
Blk/Wh
Grn/Yel
TB
R
Blue
C
Y1
Y2
W1
O
G
L
S
X1
X2
TS
L1
ER1 to ER4 - Aux heat stage relays
Air Handler 10kW Electric Heat
TS1
Yellow
Yellow
FL1
HE1
Blue
Blue
Blue
RELAY R2
White
Brown
Yellow Blue
Yellow
L2
Black
C
5 Speed
1 ECM
Blower
2
Motor
3
4
5
L N
Red
Grey
Tan
Legend
Factory Low voltage wiring
G
Light emitting diode - Green
Factory Line voltage wiring
Field low voltage wiring
Field line voltage wiring
208-230V Relay coil
EHC
Optional block
DC Voltage PCB traces
Internal junction
EHC Electric Heat Contactor
Quick connect terminal
1 2 3
Thermal Limit Switch
P
Field wire lug
PB - Power block
Ground
N.O., N.C.
HE - Heater element
Breaker
18
1
Orange
2
3
Orange
Brown
G
Blue
White
Polarized connector
97P901-03