TMG -HW41T Product Manual page 14

5.Burner operation
Be sure water is flowing through water heater coil before turning on HOT WATER switch. Turn thermostat
to desired temperature. Burner will ignite and remain in operation as long as there is sufficient water flow
to satisfy the pressure switch and temperature control.
IF YOU EXPERIENCE IGNITION FAILURE, DO NOT ATTEMPT TO RESTART BURNER! EXCESS FUEL
AND VAPORS MAY HAVE ACCUMULATED AND THE CHAMBER MAY BE HOT. THE UNIT MUST COOL
DOWN BEFORE RESTART CAN BE ATTEMPTED.
Warning: Condensation on Coil
When cold water is being pumped through the heater coil and the burner is firing, condensation
may form at times on the coil and drip down into the burner compartment. This can be
particularly noticeable on cold, humid days giving the false appearance of a leaking coil. A
leaking coil or system will be evident if the pump keeps cycling with the trigger released. The
pump head pressure should read '0'.
Electrically Operated Burners – These models generate 12V from the gasoline engine and
provide the necessary power for the burner. IF YOU REQUIRE UPGRADES OR MODIFICATIONS
TO YOUR EXISTING ELECTRICAL SYSTEM IN ORDER TO OPERATE YOUR PRESSURE
WASHER, THEY MUST BE PERFORMED BY A LICENSED ELECTRICIAN AND BE COMPLETED
IN ACCORDANCE TO ALL APPLICABLE CODES
IN YOUR AREA OF OPERATION. The power supply must be adequate for your specific unit.
Make sure to verify the data plate for your machine's specific requirements (i.e. voltage,
amperage, etc.).
6.Pressure adjustment - The pressure regulator (unloader) is located on the pump (see pages 19, 21 & 23
diagrams. It controls the pressure being generated by the pressure washer. This regulator may be
adjusted to the desired pressure by turning the adjustment knob. Turning the adjustment knob clockwise
will increase the pressure. NEVER OPERATE SYSTEM AT A HIGHER PSI THAN THE MAXIMUM RATING.
This machine has been adjusted to operate at a specific maximum pressure as per the machine
specifications. Pressure may be reduced for lighter use by turning the Pressure Regulator/Unloader
counter clockwise. If continuing to turn the unloader clockwise does not increase the pressure, then this
implies the maximum has been reached for
the system. Any further turning of the unloader will cause the
pressure to spike when the wand trigger is released, resulting in possible damage to the machine. To avoid this
effect, loosen the unloader (counter-clockwise) until the pressure just starts to drop (see pump head pressure
gauge) and until it no longer exceeds the maximum pressure rating for the machine.
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