Procedure; Engine Pre-Heat Function - ITR Oasis® Zephyr ™ Oasis Zephyr HW Installation And Operating Manual

Section 8, Domestic Hot Water Heating
NOTICE
International Thermal Research
It is not recommended to mix your engine cooling system
with your heating system. Before connecting anything to
your engine, consult your engine owner's manual for any
restrictions or plumbing into the engine cooling 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.
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 heat exchanger can also be used to pre-
heat an engine before starting it. The Oasis® Zephyr™ HW
contains two connections on the back panel to connect to the
engine coolant system. It is recommended to use minimal
¾" ID hose for this connection. 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.
A manual switch
8-3