3
installation
&
operation
manual
|
oxm
/
ogm
heating
system
2
PLUMBING INSTALLATION
CAUTION
!
Pressure hazard:
Power must be turned off and locked out at the service panel when the isolation valves are in the
closed position. Failure to do so may cause damage to heating system components, damage to lubrication oil, fluid
leaks and unexpected release of heated fluid.
Overheating hazard:
After completing line installation, top off the fluid levels to compensate for the fluid used to fill
the lines and heating tank. Do not operate the heating system without the presence of fluid. Position the heating tank
to ensure it is completely full of fluid while in operation.
Pump priming:
Fill the supply line with fluid. Pump is self-priming. However, fluid must be present in the pump before
start-up. Trapped air inside the pump will cause pump and seal damage.
Pump seal damage:
Do not reduce the oil supply line to an inner diameter smaller than the pump inlet; pump seal
damage will occur.
Check valve:
HOTSTART recommends installing a user-supplied swing-type or full-flow check valve (non-return valve)
to prevent oil from flowing back into the oil sump. If the pump is installed above the minimum oil level, a check valve
must
be installed.
Pressure relief valve
: If the OXM/OGM heating system is for use with a closed, pressurized fluid system, additional,
user-supplied pressure relief must be installed along the heating system outlet plumbing. User-supplied pressure
relief valve plumbing must be routed back to oil sump, oil tank or atmospheric pressure. Do not route pressure relief
plumbing back to heating system tank.
Isolation valves:
HOTSTART recommends installing full-flow ball valves to isolate the heating system in order to
perform service on the system or engine without draining oil.
