3
Hot Surface Ignition Models Service Manual
TABLE OF CONTENTS
General Information
I.
Arrangement of Manual ..................................... 3
III. Service Preparation ........................................... 3
IV. Tools Required .................................................. 4
V.
Parts .................................................................. 4
Specifications
I.
General Specifications
1. Fuel Selection ............................................... 5
2. Electrical ....................................................... 5
3. Ventilation ..................................................... 5
4. Heater Sizing ................................................ 5
II.
Heater Performance Specifications ................... 6
Component Operation
I.
Air System
1. Air Pump ....................................................... 7
2. Air Filters ...................................................... 7
3. Nozzle .......................................................... 7
II.
Electrical System
1. Motors .......................................................... 7
2. Ignition Control/Photocell ............................. 8
3. Hot Surface Ignitor ....................................... 8
III. Fuel System ...................................................... 8
IV. Combustion System .......................................... 9
V.
All Systems Working Together .......................... 9
Troubleshooting
I.
Safety Requirements ....................................... 10
II.
Cautions .......................................................... 10
III. Using The HA1170 Tester
1. Operation .................................................... 10
2. Calibration .................................................. 10
IV. Diagnostic Charts ............................................ 10
Wiring Diagrams ................................................. 23
GENERAL INFORMATION
I.
ARRANGEMENT OF MANUAL
This manual contains information and service procedures to
assist the service technician in understanding and correcting
problems on DESA International oil-fired portable forced air
heaters. The first section of the manual contains basic infor-
mation concerning the operation of the different components
in the heater. This information should be reviewed by service
personnel to provide a basic understanding of how the com-
ponents function in the working system. The
Troubleshooting
section of this manual is intended to provide a quick reference
concerning conditions which result in customer complaints.
These procedures will help the service technician quickly
diagnose a malfunctioning heater. The illustrations in this
manual may not necessarily depict the actual heater model,
and are intended for reference ONLY.
III. SERVICE PREPARATION
A clean work area at the start of each job is essential for
efficient service work. Heaters which are extremely dirty
should be cleaned prior to service. Cleaning will occasionally
uncover the problem area. Tools needed for the job should be
obtained before work is started. Delays resulting from locating
tools result in lost time and wages.
Clean fuel should always be used when testing heaters. Many
problems are often traced to the use of the wrong type of fuel
or dirty fuel.
Use caution and common sense when working on a heater.
Always remember that kerosene is flammable, and electrical
parts can result in potential shock. Heater parts are hot during
operation, which could result in burns.
For replacement parts contact:
www.PartsFor.com
