MODGAS-XWR-1 Technical Guide
STAND-ALONE WIRING
11
12 Relay E-BUS Expansion Module - Stand Alone
12 Relay E-BUS Expansion Module
The 12-Relay E-BUS Expansion Module can be used to provide addi-
tional fi xed heat stages for all Stand-Alone wiring. See
Figure 8, below
.
In order for the 12 Relay E-BUS Expansion Module to operate, the Stand-
Alone setting in the LCD Confi guration Screens must be set to Forced.
If communication is lost to the 12-Relay E-BUS Expansion Module,
the 12-Relay E-BUS Expansion Module will turn off its relays and the
MODGAS-XWR Controller will alarm and fall back to using only its
onboard stages. If communications is restored, the MODGAS-XWR
Controller will begin staging up if needed.
Figure 8: Stand-Alone - 12-Relay E-BUS Expansion Module
