Page 6 - equipsupply tech manual 2009

Oil Heater Service Info. Oil Fired Heaters

General Precautions

Direct–fired forced air heaters

Direct-Fired means that all of the combustion products enter the heated space. Even though this heater operates very close
to 100 percent combustion efficiency, it still produces small amounts of carbon monoxide. Carbon monoxide (called CO)
is toxic. We can tolerate small amounts, but not a lot. OSHA says that 50 parts per million (ppm) in the air we breathe is
okay if it does not average more than that during an 8 hour working period. Regardless, CO can build up in a heated space
and failure to provide adequate ventilation could result in death. The symptoms of inadequate ventilation are:

headache
dizziness
burning eyes and nose
nausea
dry mouth or sore throat
So be sure to follow advice about ventilation in these operating instructions.
Forced air means that a blower or fan pushes the air through the heater. Proper combustion depends upon this air
flow; therefore, the heater must not be revised, modified, or operated with parts removed or missing. Likewise, safety
systems must not be circumvented or modified in order to operate the heater.

Preparation/Tools Required

Low Pressure Oil Heaters have many small parts: Start by making a clean work area. This will give you an area to layout the
disassembled parts. Gather the tools required before work is started. You will need the following: 1/4" and 5/16" Nut
drivers, 1/8" Allen wrench, common size open end wrenches and screwdrivers, 0-15 PSI Pressure gauge (HA1180),
flashlight, oil drain pan, .001 to .1 Feeler gauge, AC250V/RX1 Volt/Ohm meter,and a few gallons of fresh clean kerosene.
In addition to the tools mentioned above, every shop should have an HA1170 Tester. It is equipped with a three-position
switch (off, solid, flashing) for a red LED and a set of alligator clips.
The HA1170 Tester is designed to take the guess work out of repairing HSI heaters. The HA1170 Tester will troubleshoot
HSI photocells and Ignition Control Boards. It is an essential tool when telling the difference between a good part and a
bad part in HSI heaters. Specific instructions on using the HA1170 Tester are found in the Photocell Section and the
Ignition Control Board Section. The HA1170 Tester can also be used to test components for a heater with solid state
ignition, making it more practical to own.

—6—