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Figure 23: Diagnostic Screen
PARAMETER
DESCRIPTION
Boiler pump
Pump A
Auxilary
Pump
Pump B. 3-way valve diverter operation
DHW Pump
Pump C. Additional contact rated for 1/6hp.
Sequence of Operation
Pump A is energized on DHW
Interlock: Flow switch, LWCO (if equipped), Blocked flue
switch (N/C), Low gas switch (4.5” w.c., N/O), High gas
switch (14” w.c., N/C)
Pressing
provides additional temperature information.
Figure 24: Temperature screen
