North Star M157597AG, Owner'S Manual

Page: 43 / 64

Maintenance & Repair
43
Maintain burner's
fuel filter/water
separator Drain water from burner's filter bowl as needed, and replace filter
after every 500 hours of use or as needed.
1) After each use of the burner, visually check the filter bowl. If any
water has accumulated, drain it via the water drain at the bottom of the
bowl.
2) After every 500 hours of operation, inspect the fuel filter/water
separator. Replace filter as needed.
Figure 17
Descale heating coil Descale coil tubing annually or more frequently as needed.
In hard water areas, scale can build up inside the heating coil tubing.
Scale deposits will decrease the output pressure and temperature of heated
spray, and may eventually clog water flow through the heating coil.
Descale the coil tubing at least annually, and more frequently if you detect
a decrease in output pressure or temperature.
To descale the coil:
1) Mix a commercial coil cleaner in a 5-gallon bucket and elevate the
bucket so it is higher than the unloader.
2) Attach the high-pressure hose(s) to the high-pressure water outlet on
the machine. Do not hook up the spray gun.
3) Place the other end of the high-pressure hose(s) in the 5-gallon bucket.
4) Attach a short length of garden hose to the garden hose inlet on the
pump.
5) Prime the pump by filling the hose with water, then placing the end of
the hose in the bucket.
6) Run the pressure washer in cold mode for 1 to 3 hours, recirculating
the cleaning solution. CAUTION: Do not run the burner.
7) Dispose of the cleaning solution where it is not harmful to animals or
the environment.
8) Flush with fresh water and clean the inlet strainer when finished.
Filter bowl Water drain