Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service

Sequence of operation

Table 1A_(continued from previous page) Sequence of Operation - Space Heating and DHW

OPERATION

DISPLAY

9.If the DHW thermostat remains on for more than 30 minutes, and the space heating call for heat is also on, then the control will turn on the boiler pump, turn off the DHW pump

after 2 seconds, and resume firing based on the space HTR: RUN STG 12

heating setpoint. As long as both the space heating and OUT: 123.0F(129) DHW calls for heat remain active, the control will switch

back and forth between the two modes until one of them is satisfied.

10.Once both calls for heat are satisfied, the control will turn

 

off

the burners. The blower will remain on for the

HTR: POSTPURGE

 

30

second postpurge cycle. Any pumps that are running

 

will continue to run for their respective pump delay times,

OUT: 127.4F(129)

 

then turn off.

 

 

 

11.

Boiler pump off, system pump continues its delay if HTR: Standby

 

longer.

OUT: 124.7F(129)

 

 

 

12.

System pump off.

HTR: Standby

 

 

 

OUT: 122.9F(129)

10

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Lochinvar 2072, 402 service manual HTR Postpurge

402, 2072 specifications

Lochinvar 2072,502 is an innovative and robust water-heating solution tailored for residential and commercial applications. This model represents a significant advancement in energy efficiency and performance, catering to the dynamic heating requirements of modern buildings.

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