MODGAS-XWR-1 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 confi guration, 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 fi xed heat stages can be used by using
Heat Relays 3 & 4 below and up to 12 more additional
fi 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-
XWR Controller in Stand-Alone, the SAT Sensor always attaches to the
Primary MODGAS-XWR Controller.
