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OPERATION IN SUB-FREEZING TEMPERATURES:
Diesel and No.2 heating oil can begin to solidify at temperatures below 32°F (0°C). Kerosene can be mixed
with Diesel fuel / No.2 heating oil in the tank to lower the freezing point of the fuel. If the heater will regularly
be used in an environment where the unit has been allowed to cool to below 0°F (-18°C), a fuel-filter heating
band will be necessary. On an initial cold start, with the unit plugged in and the heating band allowed to warm
for ~30 minutes, use the prime switch to circulate warm oil through the system for a couple of minutes prior to
starting. Use of100% kerosene may also be necessary in this scenario.
Optional Accessories:
FUEL-FILTER HEATING BAND:
SunFire heaters can be fitted with a fuel-filter heating band to assist fuel flow in cold conditions.
HEATING BAND PLACEMENT:
Slip the heating band securely around the filter element.
Remove the heating band before servicing or replacing
the filter element.
HEATING BAND CONNECTION:
To connect the heating band, first unplug the heater
from its power source and remove the cover from
the burner housing (see Burner Service section). Feed the
wire leads of the heating band through the grommeted
opening in the underside of burner housing and refer to
the wiring diagram in this manual to connect them to the
terminal block. Replace the housing cover when finished.
Do not use the fuel-filter heating band in temperatures above 40°F (4.4°C), as volatile vapors may
form in the fuel system, resulting in a hazard and/or damage to the product.
THERMOSTATIC CONTROL:
SunFire heaters can be connected to a thermostat to regulate the ambient temperature. Use a simple wall
thermostat that does not require an external power source. Supplying power to the thermostat circuit will
damage the primary control of the heater. Please use a basic, battery or mechanically-operated thermostat.
When controlled by another device (like a thermostat or a timer), the heater could turn itself on at
any time. Do not leave the operation-control switch in the "ON" position when unattended.
THERMOSTAT WIRE CONNECTION:
With the control switch in the OFF position, disconnect the
thermostat-bypass connector on the side of the unit (white
plug with red wire) and keep in a safe place for future use.
Use the thermostat cable and connector included in the
manual packet to connect the thermostat to the burner
(R & W terminals on most thermostats). The thermostat
may then be set to the desired ambient temperature and
placed at your desired location, taking care not to route
the thermostat cable near hot surfaces of the heater.
sunfireheaters.com
+1 (855) 251-1649
INSTALL HEATING BAND
INSTALL THERMOSTAT
19
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