H I G H P R E S S U R E P O R T A B L E F O R C E D A I R H E A T E R S E R V I C E M A N U A L
4
2
S E C T I O N
Pressure Gage
INTRODUCTION
Arrangement Of Manual
This manual contains information and serv-
ice procedures that help the service person
understand and correct problems on the
DESA International High Pressure Portable
Forced Air Heater. The first part of this manual
contains basic information about the opera-
tion of different parts of the heater. Review
this information. It provides a basic under-
standing of how the parts function in the
working system. The last part of this manual
is a troubleshooting section. It provides a
quick reference concerning conditions which
may result in customer complaints. These
procedures will help the service person
quickly diagnose a malfunctioning heater.
The illustrations in this manual may not nec-
essarily depict the actual heater model. They
are intended for reference only.
Technical Service Department
The Technical Service Department, located
in Bowling Green, Kentucky, is committed to
help increase the service knowledge of those
who service these heaters. This will enable
service people to provide prompt, efficient
service. This service manual covers the major
problems that can occur with the heaters.
However, as with any product, certain prob-
lems can arise which this manual does not
cover. If such problems arise, please call the
Technical Service Department at 1-800-323-
5190. The Technical Service Department is
open from 8:00 am to 4:00 pm Central Time.
This number is only for servicing problems
and cannot be used for ordering parts, billing
questions, etc.
Service Preparation
A clean work area at the start of each job is
essential for efficient service work. Clean
extremely dirty heaters before servicing.
Cleaning will sometimes uncover the prob-
lem area. Gather tools needed for the job
before work is started. Having to locate tools
causes delays that lead to lost time and
wages.
Always use clean fuel when testing heater.
Many problems are often caused by the
wrong type of fuel or dirty fuel.
Use caution and common sense when work-
ing on heater. Always remember:
• Kerosene is combustible.
• Guard against electrical shock.
• Heater parts get hot during operation.
Touching these parts can cause severe
burns.
Tools Required
In addition to common hand tools, the serv-
ice shop should have the following tools and
instruments to properly repair the heater.
These tools and instruments will be referred
to throughout this manual.
Tool/
Part
Instrument
Range
Number
Volt Ohmmeter
RX1/AC 250V
*
Feeler Gage
.001 to .1 inch
**
Pressure Gage
0-200 PSI
M4574
Flame Control/
Photocell Tester
HA1170
* Available at most electronic stores.
** Available at any auto parts store.
CAUTION: OBSERVE SAFETY RULES
V-
MA
0
1000
300
100
30
10
3
1000
300
100
30
10
3
1
.1
10
1000
100
x1
x10
x100
x1K
x10K
D
C
V
D
M
C A
COM-
A
C
V
T
E
S
T
5
10
15
20
25
30
1
2
3
4
5
8
6
9
10
7
OFF
Volt Ohmmeter
.025
.0015
Feeler Gage
