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WIRING AND OPERATION (cont’d)
Circulator
Motor
8J48A
Thermostat
L2L1
C2C1
Figure 6. Typical Connections for
Zoning with 2-Wire Zone Valves
B3B1
TV
Z
24V
Gas
Valve
Hot
LINE
W-R
1361
Zone
Valves
Neutral
T
13
2
Figure 7. Alternate Connections for using Separate
Low Limit-Circulator Control on
Boiler with Tankless Domestic Coil
Z
BL
W
R
W
B
Low Limit
Circulator
Control
NOTE: Remove external jumper
between W and Z terminals
Circulator
Zone 1
Circulator
Zone 2
8J48A
829A
Relay
829A
Relay
Figure 8. 8J48A - 24 Volt Systems Zoned with Circulators
Thermostat
Zone 2
B1 B2 B3 L1 L2
C1
BZTP
TWTV
C2
36C Series
Gas Valve
Factory-
Installed
Jumper
Field-
Installed
Jumper
TR TH-TR TH
Field-
Installed
Jumper
Thermostat
Zone 1
531
246
Thermostat
Zone 3
531
24
120 V
6
Circulator
Zone 3
Neutral
Hot
Line Voltage
Low Voltage
Circulator
Zone 1
Circulator
Zone 2
8J48A
829A
Relay
829A
Relay
Figure 9. 8J48A - Millivolt Systems Zoned with Circulators
Thermostat
Zone 2
B1
To 750 MV
Thermopile
B2 B3 L1 L2
C1
BZTP
TWTV
C2
36C Series
Gas Valve
Factory-
Installed
Jumper
Field-
Installed
Jumper
PG TH-PG TH
Field-
Installed
Jumper
Thermostat
Zone 1
531
246
Thermostat
Zone 3
531
24
120 V
6
Circulator
Zone 3
Neutral
Hot
Line Voltage
Low Voltage