51
Multiple H
A
FC’s and Switc
hing R
elay
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON
OFF
PRIORITY
120V RELA
Y
FUSE 1 AMP
24 VAC
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
120 V
AC INPUT
TO: "TT" ON BOILER
120 VOL
T CIRCULA
TORS
ZC ZR
X X
END
SWITCH
ZONE1
ZONE2
ZONE3
ZONE4
POWER
INPUT
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
JUMPER
BOILER
H
N
SR 504
DHW
HEATER
AQUASTAT
THERMOSTAT
POWER PM
CALL FOR HEAT
FAN, COOLING
FAN, HEATING
OUTDOOR
CONDENSER
UNIT
T
T
BOILER
AIR HANDLER
G
G
XX
C
R
Y
C
RG
Y
T
W
THERMOSTAT
AQUASTAT
HAFC101
HYDRO AIR FAN CONTROL
M
Low
High
Line
24 VAC
FanRelays
LOW
HIGH
THERMOST
A
T
T
T
BOILER
AIR HANDLER
G
G
XX
C
R
Y
C
RG
Y
T
W
THERMOSTAT
AQUASTAT
HAFC101
HYDRO AIR FAN CONTROL
M
Low
High
Line
24 VAC
FanRelays
LOW
HIGH
2 SPEED AIR HANDLER
THERMOST
A
T
T
T
BOILER
AIR HANDLER
G
G
XX
C
R
Y
C
RG
Y
T
W
THERMOSTAT
AQUASTAT
HAFC101
HYDRO AIR FAN CONTROL
M
Low
High
Line
24 VAC
FanRelays
LOW
HIGH
OPTIONAL POWER WIRE
TO THERMOSTAT
THAT REQUIRES 24VAC
OPTIONAL POWER WIRE
TO THERMOSTAT
THAT REQUIRES 24VAC
OPTIONAL POWER WIRE
TO THERMOSTAT
THAT REQUIRES 24VAC
TO: AQUASTAT ON
RETURN LINE OF
HYDRO COIL
TO: AQUASTAT ON
RETURN LINE OF
HYDRO COIL
TO: AQUASTAT ON
RETURN LINE OF
HYDRO COIL
OUTDOOR
CONDENSER
UNIT
OUTDOOR
CONDENSER
UNIT
2 SPEED AIR HANDLER
2 SPEED AIR HANDLER
POWER PM
CALL FOR HEAT
FAN, COOLING
FAN, HEATING
POWER PM
CALL FOR HEAT
FAN, COOLING
FAN, HEATING
TT
T