Maintenance - Newmac NMRK-1 Manual

For optimal performance of this heater it is strongly suggested that 1-K kerosene be used. 1-K kerosene has
been refined to virtually eliminate contaminants, such as sulfur, which can cause a rotten egg odor during the
operation of the heater. Light oil can be use however kerosene is recommended. Bulk fuel storage should be a
minimum of 25 ft. from heaters, torches, portable generators, or other sources of ignition. All fuel storage should
be in accordance with federal, state, or local authorities. Never put the fuel or heater in a location with direct
sunlight. Do not store the unit with fuel inside it. The fuel will go bad and cause the heater to malfunction.
REFUELING
Never fill the fuel tank in the living space, only fill the tank outdoors. Do not overfill your heater and be sure the
heater is level. The first time you light the heater, it should be done outdoors. This allows the oils, etc., used in
manufacturing heater to be burned off outside.
Do not refuel if the unit is overheated. Refueling the overheated unit could result in explosion.
VENTILATION
Minimum 19ft² of fresh air ventilation is required for proper ventilation.
Operating method
1. Fill fuel tank with kerosene or No. 1 fuel oil. The unit is full when the needle of the flow-meter is aimed at "F".
2. Always close the fuel cap after refueling.
3. Plug in the power supply.
4. Turn thermostat control knob to desired setting and push power switch to "ON" position. Power indicator
lamp will light and heater will start.
The major electrical components of this heater are protected by a safety fuse mounted to the PCB board.
If your heater fails to start, check this fuse first and replace as necessary. You should also check your power
source to insure that proper voltage and frequency are being supplied to the heater.
SHUTTING DOWN THE HEATER
Once the power supply switch is in the "OFF" position, the combustion will stop. The fan will continue to run for
an additional 3 to 4 minutes to cool the unit.
Unplugging the heater before the cooling fans have stopped may cause damage to the unit.

MAINTENANCE

USE ORIGINAL EQUIPMENT REPLACEMENT PARTS. Use of third party or other alternate components will void
warranty and may cause unsafe operating conditions.
FUEL TANK
Flush every 200 hours of operation or as needed. When cleaning, use gasoline or kerosene NOT water. Allow to
dry completely after cleaning. WARNING: REMOVE ALL GASOLINE BEFORE REFUELING!
FILTER
There are two different injection filters on the pump filter (or oil filter). Clean two times a year or as needed by
rinsing them with kerosene or gasoline.
Using Fuel
Never service heater while it is plugged in or while hot!
Do not leave the heater unattended while in operation.
Warning:
Warning:
Warning:
Warning:
Warning:
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