International Thermal Research 6-1
Wiring the Electrical System
6.1 Before You Begin
The heater and its electrical control board are pre-wired and
have been thoroughly tested together as a unit.
To review the wiring system for the entire heating system,
refer to the schematic at the end of this section (Figure 6-4.)
All electrical connections and wiring must comply with
normally-accepted 12 VDC and 120 VAC wiring practices, local
regulations, and RVIA standards. Only a qualified electrical
installer should complete the wiring. All field wiring is to be in
accordance with CSA Standard C22.1, Canadian Electrical Code
Part l or the National Electric Code, ANSI/NFPA 70.
6.2 Oasis SCH33 12 VDC
The following applies to the 12VDC power supplied to the
Oasis
®
SCH33™:
• There is one electrical terminal on the main control
board for the primary 12 VDC power; positive (red) and
negative (black). There are no direct 12 VDC power
connections to the heater itself.
Primary DC power should originate from a dedicated
connection on the house battery bank. A 25-amp fuse or
breaker must be included close-to and inline from the battery
to the positive connection on the control board. The gauge of
the primary power wire must be sized so there is no more
than a 3% voltage drop from the battery to the heater.
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