Section 7, Plumbing the System
7-6 Installation Manual for Oasis
®
SCH33™ Heating System
7.4 Potable Water Plumbing Installation
(optional)
The potable water heat exchanger should be installed in the heating
loop, before the first fan (see Figure 7-2). If a summer loop is being
used, the potable water heat exchanger should be installed before
the 3-way valve (see Figure 7-3).
The maximum water supply pressure to the heat exchanger is 150
PSI (10 bar). The Hot water outlet temperature must be regulated by
an external mixing valve factory set at 120F (49°C).
All potable water connections should be made with a crimped, Pex to
Pex connection.
ITR warranty does not cover damage caused by leaks from
connections made during installation.
All fittings, hose, tube and fitting sealant involving the potable water
must be food safe and approved for use with potable water and
rated for the potable water system pressure.
7.5 Engine Waste-heat and Engine pre-
heat Plumbing (optional)
The optional engine heat exchanger should be plumbed into the
heating loop as shown in Figures 7-2 and 7-3. The coolant in the
engine loop should flow through the engine heat exchanger in the
same direction as the coolant flowing through the heat exchanger
from the SCH33. When the Oasis SCH33 is connected to the engine,
engine waste heat can be used to provide space heating and hot
water. The Engine Heat Supply/Return connections can be made
using 1/2" MPT x 1/2" hose-barb or 1/2" MPT x 3/4" hose-barb
fittings.
If the pre-heat function is required an additional, externally
mounted, pump needs to be installed. This pump circulates engine
coolant through the engine heat exchanger, when the engine is
turned OFF. A separate Engine Pre-Heat switch is required to activate
this pump. For engine heat/pre-heat electrical connections refer to
figure 6-4 wiring schematic in Section 6, Wiring the Electrical
System.
It is recommended to contact the vehicle/engine manufacturer prior
to proceeding with the engine plumbing installation.
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