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MODGAS-XWR2 Technical Guide
STAND-ALONE WIRING
7
Secondary Board 2V2IGN2S - Stand-Alone Wiring
Figure 4: Secondary Board 2V2IGN2S Stand-Alone Wiring Diagram
Secondary Board (2V2IGN2S) -
Stand-Alone Wiring
In this conguration, the Two Modulating Valves wiring on the facing
page is the Primary portion and Figure 4, below is the Secondary por-
tion, thus creating four modulating valves as 2 stages.
This configuration operates as Stand-Alone (Figure 4, below) or
communicating with an AAON Unit Controller (Figure 12, page 15).
NOTE: Up to 2 additional xed heat stages can be used by using
Heat Relays 3 & 4 below and up to 12 more additional
xed stages can be added by using the 12-Relay E-BUS
Expansion Module. (Figure 8, page 11).
If using a MHGRV-X Controller along with the secondary MODGAS-
XWR2 Controller in Stand-Alone, the SAT Sensor always attaches to
the Primary MODGAS-XWR2 Controller.
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