ITR OASIS SCH33 - Procedure; Engine Pre-Heat Function

Section 8, Domestic Hot Water Heating
8-4 Installation Manual for Oasis
®
SCH33™ Heating System
Procedure
To set up the engine waste heat reuse function:
1
Turn OFF, the ON/OFF control switch, located on the
remote indicator panel. This will stop the burner from
operating, but all other heater functions will operate
normally. Start your engine.
2
When the engine aquastat heats up to its preset
temperature, it will automatically switch on the circulating
pump of the heating system (if any thermostats or
domestic water aquastat are calling for heat). All other
functions of the system will operate normally.
3
The circulating pump will continue to operate until the
engine aquastat has cooled down or all thermostats or
domestic water aquastat are satisfied. A manual switch
can be wired in series with this aquastat to shut down the
pump sooner if required.
8.4 Engine Pre-Heat Function
As an option, the externally mounted heat exchanger can
also be used to pre-heat the engine before starting it. This
requires a pump to be installed in-line with the engine side of
the coolant loop. Pre-heating the engine makes it easier to
start and it can be put under load immediately.
If installed, the optional engine pre-heat function is enabled
by flipping a manual switch mounted inside the living area
(not supplied), while the engine is off. This turns on a
separate (not included) engine pre-heat pump.
The manual switch and engine pre-heat pump are wired to
the vehicles electrical system via separate switches.
Procedure
To set up the engine pre-heat function:
1
Mount a manual switch (SPDT - Single Pole Double Throw)
in an appropriate place in the interior, usually near the
dashboard.