Section 1, Overview
International Thermal Research 1-3
1.3 Heater Features
The Oasis SCH33 is an advanced and efficient hydronic heater
with many advantages over older technology of forced-air
systems. The SCH33 provides space heating using a “heat-
transfer fluid” pumped to remote mounted, fan equipped,
radiator-style heat-exchangers. The same “hot” fluid can be
circulated through an optional highly efficient, externally
mounted, flat-plate heat-exchanger to provide a continuous
supply of domestic hot water through a mixing valve. The
heater runs on 12VDC power, using a diesel-fired burner to
maintain the temperature of the heat transfer fluid. The
Oasis SCH33 heater can also use waste heat from the
engine, using an optional external heat exchanger. The
addition of an optional secondary water pump will also allow
pre-heating of the engine.
Other features of the heating system include:
• 1500 Watt, 120 VAC (North America) electric element for
a supplemental and backup heating source when the vehicle
is connected to a power source
• High-temperature stainless steel burner and water jacket
to prevent premature warping or burnout
• Internal circulation pump for heating loop and hot water
heat exchanger
• Insulated enclosure retains heat and minimizes noise
• Easy to install, field serviceable, with hookups and
connections easily accessible from the top of the heater
• Quiet operation and low power consumption
• Low-pressure fuel system with built-in fuel pump
• Fuel-efficient burner capable of burning a wide variety of
diesel-based fuels
• No smoke or smell from the exhaust
• Fan assisted; sealed combustion chamber is designed to
use outside air through a direct ventilation hook-up
• Simple, low amperage draw ignition
Return fuel line to eliminate air and prevent nuisance
shutdowns
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