Master MH-45-KFA User's Manual & Operating Instructions page 9

Service (Continued):
SPARK PLUG:
Clean and re-gap every 600 hours of operation, or
replace as needed. After removing the spark plug,
clean the terminals with a wire brush. Re-gap the
terminals to 0.140" (3.5mm). See Figure 5.
Burner Head
Figure 5
PHOTOCELL:
The photocell should be cleaned using a cotton
swab dipped in alcohol or water at least once per
heating season, or more depending on conditions.
See Figure 6.
Photocell
Wire
© 2018 Pinnacle Climate Technologies, Inc.
NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR
MAINTENANCE (CONT.)
Spark Plug
Gap
Ignitor Wire
Photocell
Photocell lens
X
Figure 6
WHILE CONNECTED TO A POWER SOURCE
PUMP PRESSURE:
While heater is operating, turn adjusting screw
clockwise to increase, counter-clockwise to
decrease pressure. Correct pump pressure is as
follows:
Model Number
45-KFA
80T-KFA
140T-KFA
190T-KFA
215T-KFA
Pressure Valve
Adjusting Screw
NOZZLES:
Nozzles should be cleaned or replaced at least once
per heating season. Contaminated fuel could make
this necessary immediately. To clean dirt from nozzle,
blow compressed air through nozzle front. It may
be necessary to soak the nozzle in K-1 kerosene to
loosen any dirt particles.
Nozzle Face
X
9
Kerosene Forced Air Heater User's Manual
Pump Pressure
3.0 PSI (0.21 BAR)
3.8 PSI (0.26 BAR)
6.6 PSI (0.41 BAR)
8.5 PSI (0.59 BAR)
9.0 PSI (0.62 BAR)
Tolerance ± 10%
Figure 8
Nozzle
Figure 7
Burner Head