Honeywell SDC Service Manual page 242

Hydraulic Components
Pumps/VOs
242
Single-stage heat generator
("Heat Generator" menu, parameter 1 = 1)
Switching sequence:
2-stage heat generator
("Heat Generator" menu, parameter 1 = 2)
Switching sequence:
2x single-stage heat generators
("Heat Generator" menu, parameter 1 = 3)
Switching sequence:
Modulating mode
("Heat Generator" menu, parameter 1 = 4)
Switching sequence:
Pump test
(Direct heating circuit pump, mixed heating circuit pump, tank
loading pump, variable output 1, variable output 2)
Switching sequence
OFF, ON, OFF ...
OFF, STAGE 1, STAGE 1+2,
STAGE 1, OFF ...
OFF, HG 1, HG 1+2, HG 2, OFF ...
OFF, ON, OPEN, STOP, CLOSED,
OFF ...
OFF, ON, OFF, ...
SDC / DHC
EN2H-0221GE51 R0812