Honeywell Heating Controller SDC - 3 Overview

SDC / DHC Overview
EN2H-0220GE51 R1111 11
3 Overview
The modular SDC / DHC control device is available in an
installable switch cabinet version and a surface-mounted wall
version with the following equipment features:
Type
Number of output relays Burner stage 2 or District heating valve CLOSED Burner stage 1 Direct heating circuit Variable output 3 Mixed heating circuit 1 Mixed heating circuit 2 Tank loading pump Variable output 2 Variable output 1
SDC 3-10
3 – x x – – x –
SDC 3-40
3 – – – x – – – –
SDC 7-21
1)
7 – x x x – x – –
SDC 9-21
2)
7
+ two
variable
relays
x x x x – x x x
SDC 12-31
3)
10
+ two
variable
relays
x x x x x x x x
1)
DHC 43-1
2)
DHC 43-2
3)
DHC 43-3
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