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Sunpak® Infrared Heaters
10
Servicing Instructions
Turn off gas and electrical before attempting any service
to this appliance. Heater may be serviced by opening the
door to control compartment. Rotate round disk on
control door 90 degrees to open. Top of heater may be
removed for servicing by removing six (6) screws holding
top in place. The top should be removed if the gas
controls, burner or burner orifice is to be replaced.
1. Removal of Burner
a. Remove grille by removing two (2) screws at one
end of the grill near control door. Pull downward
at the end and grill will be loose. The end of the
grill is supported by two (2) pins that enter two (2)
holes in the reflector’s far end.
b. Remove top of heater by removing six (6) screws
holding top in place.
c. The burner can be removed without removing the
pilot-electrode assembly. However, extreme care
should be taken to prevent the burner from
contacting the fragile electrode when removing or
reinstalling the burner. To remove the pilot-
electrode assembly, disconnect the orange wire
from the module connected to the electrode.
Detach the pilot tubing. Remove the two screws
holding the pilot-electrode in place.
d. Remove burner clip securing mixer inside control
compartment. Be careful not to damage white
insulation pads.
e. Remove 3/8” hex locknut located inside the
burner orifice bracket holding piping assembly to
burner. A 7/8” 12-point wrench is recommended
to loosen the 3/8” locknut.
f. Remove two (2) screws holding the end of the
burner. Carefully slide burner down and out.
When reinstalling, be sure both ends of the
burner are beneath the reflector end flanges.
g. To reinstall burner, reverse procedure.
2. Removal of RAM-3 Direct Spark Ignition Control
a. Disconnect two 24 VAC power leads
b. Disconnect two gas valve leads.
c. Disconnect igniter lead from control
d. Disconnect green ground lead from casing.
e. Remove two (2) 8-32 x 1 1/4 screws and nuts
holding control module in place. Screw heads are
located on exterior front side of heater above
control compartment door.
f. If insufficient removal clearance, loosen control
assembly and move out of way.
Trouble Shooting
1. If no spark from electrode; or if gas valve doesn’t
work then:
a. Check power supply. There should be 24
VAC between the low voltage power wires.
Use voltmeter between inlet 24 VAC wire and
ground terminal at the electrode plate to
measure 24 VAC.
b. Check continuity. Use ohmmeter. For
example, check resistance between valve
wire and ground. Should show almost no
resistance (O ohms) through valve. If high
resistance, check wire connectors.
c. Check spark gap. Spark gap should be 7/64”
(.109”) between electrode tip, and pilot hood.
If gap is too large, spark will occur at wrong
location. If gap is too small it may not be hot
enough to light pilot burner.
d. Be sure connectors are fully inserted into
ignition control (See Wiring Diagram on
rating plate).
2. If insufficient gas flow then:
a. Manual gas valve not full “ON”. Turn valve
handle to full “ON” position.
b. Burner orifice plugged. Remove heater top,
remove burner orifice (use ½” hex wrench)
and thoroughly clean. Spiders often crawl
into orifice hole and make a web, blocking
the orifice.
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