Water Furnace SAH Series, Installation Manual

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25
SAH AIR HANDLER INSTALLATION MANUAL
Wiring Schematics cont.
SAH Air Handler Control Option C Schematic 97P903-05
RS485 NET
C R -
+
ABC
P7
ABC Control
Board in Split Unit
Detail ‘A’
Air Han
SUC P
HWHW
SCT
P8
MOTOR
P6
RS485
P7
ZONE
P9
ABC
STEPPER
ANA
ACC2
DH
DIV
C R
L1 L1 L2 L2
P12
P10
P5
P11
C R
(-) (+)
C R
(-) (+)
C R (-)
(+)
P4
P2
K1
K2
K3
C 1
C 2
C 3
COND
VS DATA
VS PUMP
P3
V+
C R
TX RX +5
P14
10
P1
CT2
4
3
CT2
4
3
CT1
2
1
CT1
2
1
Status
G
DISCH
P16
P17
P18
P15
AHB™
SW1
Modbus Add. ID
Future Use
1
2
3
4
5
ON OFF
Future Use
Acc 2 – Dip 4
Acc 2 – Dip 5
CC
O
+5
C
S
+5
C
PWM
C
C
4
X
C
C
S
+5
C
+5
8
C
C
C
7
6
9
Grn
2
3
4
5
1
ECM
Blower
Motor
2 3 4 1
Green/Yellow
Blue
PB1
Transformer
24V
HE4 FL4
HE3
FL3
HE1
FL1
5
4
3
1
H
H
SEQ1
5
4
3
1
H
H
SEQ2
RELAY RELAY
HE2
FL2
208-230/60/1
G
L2
L1
BRK1
L2
L1
BRK2
G
Circuit 1
208-230/60/1
Circuit 2
Blue
Blue
Blue
Blue
Yellow
Black
Yellow
Black
Blue
Blue
2
3
1
Blue
White
White
Brown
Brown
Blue
Black
Black
Red
Red
Red
Black
Black
Red
Red
Black
Yellow
Black/White
Black Blue
Red
White
Brown
Blue
Blue
Brown
Brown
Black
Black
Brown
Brown
T
Gray
Gray
White
Green
Black
Black
Red
Green
White
PB2
PB3
Auxiliary Heat
Current Transducer
Blower Motor
Current Transducer
Leaving Air
Temperature LAT
Condensate
Overflow
Orange
Brown
T
Black
Black
FP2 Sensor
Red
Note:1
Note:2
L1
L2
PB4
TS1
Black
Yellow
TS1
Yellow
Black
R1 R2
NOTE:4
TO COMM STAT
C R + -
TO ABC
C R + -
Communicating Thermostat
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
connect from the TO ABC (C R + -) power block
(PB2) in the
Air Handler to the ABC P7(See detail
‘A’ on schematic ) connection on the ABC board in
the compressor section.
CT
Auxiliary Heat
Current Transducer
Blower P
Factory settin
L-H settings M
"Aux" is facto
"G" may be lo
CFM is contr
Max ESP inc
066
MODEL M
022
026
030
060
036
042
048
Grn/Yel
$XURUD$LU+DQGOHU%RDUG
Thermostat
R
C
Y1
O
DH
Y2
G
W
LO
Non-Communicating
Thermostat
LO
R
C
O
G
Y1
Y2
DH
W
P1 ABC Board
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 .
Light emitting diode - Green
Fused Limit
Polarized connector
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
Thermal Limit Switch
Field wire lug
Ground
HE -
PB -
SW1 -
Heater element
Power block
DIP package 4 position
Legend
N.O., N.C.
G
L1
1 2 3
P
Breaker
TS
FL
&XUUHQW7UDQVGXFHU
Notes:
1 – To operate in 208V mode replace the blue transformer
wire connected to PB1-L2 with red transformer wire.
2 – Use manufacturer’s part number 19P592-01
(jumper bar assembly) when single source power is
required.
3 – Low voltage wiring CLASS 2.
4 – DIP switch 1 on SW1 must be set in the OFF
position.
Air Handler 20kW Electric Heat
If two separate circuits are used to supply power to the
auxiliary heat kit, the Installer will need to verify that each leg of
the auxiliary heat circuit breakers are wired from the power
supply correctly in order for the electric heat kit to operate
properly. This can be done by measuring the supply side
voltage of the auxiliary heat circuit breakers. Put a voltmeter on
the L2 side of Circuit Breaker One and on the L2 side of Circuit
Breaker Two. The voltmeter should read approximately 0 volts.
If the meter reads high voltage, the auxiliary heat breakers
need to be rewired so that breakers in the auxiliary heat kit
match the wiring of the Disconnect Panel breakers. Meaning,
L1 and L2 from one breaker in the disconnect panel must
connect to L1 and L2 at one of the auxiliary heat circuit
breakers and L1 and L2 from the other breaker in the
disconnect panel must connect to L1 and L2 of the other
auxiliary heat circuit breaker, making sure that the L1 and L2
from each disconnect breaker matches the L1 and L2 at each
of the auxiliary heat breakers.
Dual Power Supply Connections