Water Furnace SAH Series Installation Manual page 23

Wiring Schematics cont.
SAH Air Handler Control Option C Schematic
208-230/60/1
L1 L2
G
Blue
Auxiliary Heat
Current Transducer
L1 L2
PB1
Yellow
Blue
Black
Note:1
Transformer
Red
24V
CT
FP2 Sensor
Brown
Leaving Air
Temperature LAT
Orange
ECM
Blower
Motor
Grn
4 3 2
1
Blue
Green/Yellow
Condensate
Overflow Brown
Detail 'A'
ABC Control
Board in Split Unit
RS485 NET
+
C R -
ABC
P7
TO ABC
C R + -
PB2
Non-Communicating Thermostat will connect to the P1 connection on the ABC
board in the compressor section. A 4-conductor, 20AWG wire will need to connect
from the ABC P7 (See detail 'A' on schematic) connection to the TO ABC (C R + -)
power block (PB2) in the Air Handler.
LO
R
C
O
G
Y1
Y2
Non-Communicating
W
Thermostat
DH
Yellow
Yellow
TS1
Yellow
Yellow
HE2
FL2 FL1
HE1
Blue
Blue
Blue
RELAY R1
RELAY
Blue
Yellow
Yellow
Grn/Yel
Black/White
Black
T
Black
Gray
Status
T
Gray
G
AHB™
Brown
White
Green
Red
Black
LO
1 – To operate in 208V mode replace the blue transformer
R
C
O
2 – Low voltage wiring CLASS 2.
G
Y1
3 – DIP switch 1 on SW1 must be set in the OFF
Y2
position.
W
DH
P1 ABC Board
Blue
R2
1
White
Brown
2
3
PB4
Blue
Auxiliary Heat
Current Transducer
Black
Black
Brown
Brown
Current Transducer
Communicating Thermostat will connect to the
COMM STAT (C R + -) power block PB3 in the air
handler. A 4-conductor, 20AWG wire will need to
NOTE:3
connect from the TO ABC (C R + -) power block
(PB2) in the Air Handler to the ABC P7(See detail
OFF ON
'A' on schematic) connection on the ABC board in
Modbus Add. ID 1
the compressor section.
Future Use 2
Communicating Thermostat
Future Use 3
4
Acc 2 – Dip 4
Acc 2 – Dip 5 5
SW1
PB3
White
Green
Red
Black
Notes:
wire connected to PB1-L2 with red transformer wire.
23
SAH AIR HANDLER INSTALLATION MANUAL
Air Handler 10kW Electric Heat
Blower P
MODEL M
022
026
030
036
042
White
Brown
048
Blue
060
066
Factory settin
L-H settings M
"Aux" is facto
"G" may be lo
CFM is contro
Max ESP inc
Blower Motor
TO COMM STAT
C R + -
Legend
Factory Low voltage wiring
Factory Line voltage wiring
Field low voltage wiring
Field line voltage wiring
Optional block
DC Voltage PCB traces
Internal junction
Quick connect terminal
TS Thermal Limit Switch
Field wire lug
L1
Ground
N.O., N.C.
97P903-03
G Light emitting diode - Green
FL
Fused Limit
Breaker
1 2 3
Polarized connector
P
PB - Power block
SW1 -
DIP package 4 position
HE - Heater element