Specifications

16
BOILER
120 VAC INPUT
TO: "TT" ON BOILER
H
N
A
SR 502
ZONE1 ZONE2 ZONE3
24 VAC
POWER
FUSE 1 AMP
ZONE1 ZONE2 ZONE3
JUMPERS
N P ZC H X ZR
1
X
2
ZONE 2 POWER ZONE 1
TWO ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
A
PRIORITY
OFF
1234
EXPANSION
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON OFF
PRIORITY
120V RELAY
FUSE 1 AMP
24 VAC POWER
MASTER
PLUG-IN CARDS
RESET NORMAL
SLAVE
POWER CONTROL INTERFACE
ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
ZONE1 ZONE2 ZONE3 ZONE4
POWER
INPUT
SR 504-EXP
ZONE 2 POWER ZONE 1 ZONE 3 ZONE 4
JUMPER
SWITCH SETTINGS
Master/Slave: Master Reset/Normal: Normal Priority Zone: On
1234
EXPANSION
SR504-EXP
T
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON OFF
PRIORITY
120V RELAY
FUSE 1 AMP
24 VAC POWER
MASTER
PLUG-IN CARDS
RESET NORMAL
SLAVE
POWER CONTROL INTERFACE
ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
ZONE1 ZONE2 ZONE3 ZONE4
POWER
INPUT
SR 504-EXP
ZONE 2 POWER ZONE 1 ZONE 3 ZONE 4
JUMPER
SWITCH SETTINGS
Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
SR504-EXP
T
DHW
CIRCULATORS
AQUASTATS ON
DHW HEATERS
MASTER SLAVE
ZONE
NOT
USED
2 Indirect Water Heaters with Priority Connected to EXP Switching Relays