Xylem inc, Figure 1: two wire thermostat, Figure 2: three wire thermostat – Bell & Gossett P86315B ZoneTrol II AZ-1A User Manual
Page 2: Figure 4: multiple zones, Figure 3: four wire thermostat, Figure 5: multiple zones with boiler pump, Figure 6: multiple pumps with one thermostat
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
PUMP ON
LINE
PUMP
PUMP
INPUT
POWER
THERMOSTAT
TT BOILER CONTROLS
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Figure 1: Two Wire Thermostat
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
PUMP ON
LINE
PUMP
PUMP
INPUT
POWER
THERMOSTAT
TT BOILER CONTROLS
Figure 2: Three Wire Thermostat
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
ZONE 1
THERMOSTAT
TT BOILER
CONTROLS
Figure 4:
Multiple Zones
Zone 1
Pump
Controller
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
ZONE 2
THERMOSTAT
Zone 2
Pump
Controller
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
PUMP ON
LINE
PUMP
PUMP
INPUT
POWER
THERMOSTAT
TT BOILER CONTROLS
Figure 3: Four Wire Thermostat
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
ZONE 1
THERMOSTAT
Figure 5:
Multiple Zones with
Boiler Pump
Zone 1
Pump
Controller
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
TT BOILER
CONTROLS
Boiler
Pump
Controller
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
ZONE 2
THERMOSTAT
Zone 2
Pump
Controller
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
THERMOSTAT
Figure 6: Multiple Pumps
with One Thermostat
Zone 1
Pump
Controller
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
TT BOILER
CONTROLS
TO NEXT UNIT
T/R AND T/W
Zone 2
Pump
Controller
P/C AX
AX
P
X
X
T/W
T/R
TB1
TB2
LINE
PUMP
Zone 3
Pump
Controller
Xylem Inc.
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
www.xyleminc.com/brands/bellgossett
Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2012 Xylem Inc. P86315B May 2012