28
SSP-SVX001B-EN
Pairing B: Symbio Heat Pump with SZVAV /
2-Speed Air Handler
Figure 16.
Modbus and IMC connections schematic
SZVAV/2SPD
INDOOR FAN
SZVAV/2SPD
INDOOR FAN OR UNIT
W/ ELECTRIC HEAT
A
B
-P
1
5
J15
J4
1 2 3 4
2
4
V
A
C
O
U
T
C
O
M
M
O
N
IM
C
+
IM
C
-
4
4
3
3
2
2
1
1
A
B
-P
1
6
J16
1 2 3
M
O
D
B
U
S
+
M
O
D
B
U
S
-
C
O
M
M
O
N
3
3
2
2
1
1
J7
Air Handler Relay Board
Condenser
Adapter Board
Figure 17.
Connection schematic for air handler
defrost control switch
J16
J5 1
Condenser - Symbio 700
Unit Controller
AIR HANDLER
RELAY BOARD
P16
24 VAC OUT
DEMAND LIMIT/SHED
1
2
1
2
1. Zone control (see
a. For 2-Speed Air Handler operation, connect a
thermostat or other zone control device to the
Symbio 700 Unit Controller as shown on unit
schematic.
b. For SZVAV Operation, connect a zone sensor or
other BAS zone control device.
2. Make MODBUS and IMC connections between the
outdoor and indoor units as shown on the unit
schematic (see
).
IIm
mp
po
orrtta
an
ntt:: Ensure MODBUS and IMC signal wires
(+, -) are twisted pairs.
3. If desired, make connection for the air handler coil
defrost control switch between the outdoor and
indoor units as shown on the unit schematic (see
).
4. Refer to the air handler IOM (SSA-SVX06*-EN) for
other required connections between air handler and
Heat Pump.