GF-135
Esteem 399 Low NOx Boiler
Chapter 18
OMM-0089_0A
Installation, Operation & Maintenance Manual Controller Operation
Page
131
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
Table 18-3: Circulator Operation with System Pump = CH1/CH2/DHW
CH2 Pump/System Pump Auxiliary Boiler Pump DHW Pump CH (1) Pump
CH1 Call
ON
ON
OFF
(see note)
ON
CH2 Call
ON
ON
OFF
(see note)
ON
DHW Call
ON
ON
ON
OFF
(see note)
NOTE
CH1/CH2/DHW -
The system pump will be enabled for any CH1, CH2, or DHW call. Figure 18-23 illustrates
a typical existing system requiring this setting.
Table 18-4: Circulator Operation with System Pump = CH1/CH2
CH2 Pump/System Pump Auxiliary Boiler Pump DHW Pump CH (1) Pump
CH1 Call
ON
ON
OFF
(see note)
ON
CH2 Call
ON
ON
OFF
(see note)
ON
DHW Call
OFF
(see note)
ON
ON
OFF
(see note)
NOTE
CH1/CH2 -
The system pump will only be enabled for a CH1 or CH2 central heating call. Figure18-24
illustrates a system zoned with zone valves requiring this setting.
Table 18-5: Circulator Operation with System Pump = CH2
CH2 Pump/System Pump Auxiliary Boiler Pump DHW Pump CH (1) Pump
CH1 Call
OFF
ON
OFF
(see note)
ON
CH2 Call
ON
ON
OFF
(see note)
OFF
DHW Call
OFF
(see note)
ON
ON
OFF
(see note)
NOTE
CH2 –
The system pump will only be enabled for a CH2 central heating call. The CH(1) pump will only be
enabled for a CH1 central heating call. Figure 18-25 illustrates a system zoned with zone circulators
requiring this setting.
