Table of Contents
Advertisement
CIRCUIT
BREAKER
CUSTOMER
EMERGENCY
SWITCH
THERMAL
(FIROMATIC)
SERVICE
SWITCH
WATER
CUTOFF
NOTE: Tankless coil has priority.
CIRCUIT
BREAKER
CUSTOMER
EMERGENCY
SWITCH
THERMAL
(FIROMATIC)
SERVICE
SWITCH
WATER
CUTOFF
NOTE: The boiler operating control's ZC terminal will see the load of the circulator(s).
4
L1
L2
(HOT)
(NEUTRAL)
FUSE
120V RELAY
POWER
LOW
L1
L2
(HOT)
(NEUTRAL)
24 VAC
POWER
FUSE
LOW
ZONE 4
PRIORITY
SR 504
ZONE 1 ZONE 2 ZONE 3 ZONE 4
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
X
X
ZONE1 ZONE2
ZONE3
ZONE4 POWER
END
SWITCH
INPUT
THERMOSTAT
SR 503
ZONE 1 ZONE 2 ZONE 3
THREE ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE1
ZONE2
ZONE3
X2
N
P
ZC
H
X1
ZR
120 VOLT CIRCULATORS
(cont.)
THERMOSTAT
ON
OFF
T
T
L1
L2
HONEYWELL L8124
POWER
OR EQUAL
ZONE 1
ZONE 2
C1
ZC
ZONE 3
ZONE 4
B2
C2
ZR
B1
CIRCULATOR
ON BOILER
(IF ATTACHED)
LINE VOLTAGE
OIL BURNER RELAY
THERMOSTAT
L1
L2
T
T
HONEYWELL L8124
POWER
OR EQUAL
ZONE 1
ZONE 2
C1
ZC
ZONE 3
B2
C2
ZR
B1
CIRCULATOR
ON BOILER
(IF ATTACHED)
LINE VOLTAGE
OIL BURNER RELAY
Hide quick links:
Advertisement
Table of Contents
