WattMaster WM-WCC3-TGD-01B - Manual (Page 779)

Operator Interface
VAV/Zone Controller Technical Guide
11
Expansion Board Installation & Wiring
Wiring Considerations
Expansion Boards are used to supply extra relays and/or analog outputs
to control fan and heating functions for the VAV/Zone Controller.
When Round VAV/Zone Dampers or Rectangular VAV/Zone Control-
ler Kits are ordered from WattMaster, the OE322 Expansion Board is
shipped loose for fi eld mounting by others.
Mounting of the OE322 Expansion Board is identical to the previously
described mounting for the VAV/Zone Controller. Mount the Expan-
sion Board near the VAV/Zone Controller using the sheet metal screws
provided. Be sure the mounting location is close enough so that the
supplied modular cable will reach from the VAV/Zone Controller to
the Expansion Board.
WARNING: The 3 relay outputs available on the OE322 Output Ex-
pansion Board are each rated for 2 Amps @ 24 VAC. If your device load
exceeds these limits, a pilot duty relay (by others) must be used in the
circuit.
The wiring consideration information previously outlined for the VAV/
Zone Controller should be followed when wiring the OE322 Expan-
sion Boards.
Figure 7: Expansion Board Wiring For Two Position Hot Water Heat Applications