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100,000 Btu/Hr
PROPANE CONSTRUCTION HEATER
SERVICE
PROCEDURES
Continued
SPARK TRANSFORMER
1. Remove base tray.
2. Locate and disconnect white, black, and
orange wires from spark transformer.
3. Remove two screws holding spark
transformer to base. Remove sheet
metal nuts on transformer and install
on new transformer. Discard spark
transformer.
4. Install new spark transformer. Position
new spark transformer in same manner
as old transformer.
5. Connect white, black, and orange wires
to new spark transformer. Connect
wires to correct terminals as noted in
step 2.
6. Replace base tray.
Ignitor
Wire
Bushing
Figure 10 - Removing Ignitor Wire from
Spark Transformer
IGNITOR
1. Remove motor, motor mount, and fan
guard (see Motor, page 7, steps 1
through 6) .
2. Remove orange ignitor wire from
ignitor.
3. Remove ignitor mounting screw from
rear head using nut-driver or standard
screwdriver (see Figure 11).
4. Remove ignitor from rear head.
5. Install new ignitor. Attach ignitor to rear
head with ignitor mounting screw.
6. Attach ignitor wire.
7. Check gap between ignitor electrode
and nozzle to .13"/.15" (see Figure 12).
8. Test for spark.
WARNING: Make sure heater
is disconnected from propane
supply. Heater could ignite caus-
ing severe burns.
Plug into extension cord and watch for
spark between ignitor electrode and
nozzle.
9. Place motor, motor mount, and fan
guard into rear of heater shell (see
Motor, page 7, steps 14 through 18).
Ignitor
Mounting
Screw
Ignitor
Rear Head
Figure 11 - Removing Ignitor Mounting
Screw and Ignitor
Burner
Nozzle
Gap
Area
Figure 12 - Clearance between Ignitor
Electrode and Target Plate
8
ACCESSORIES
Purchase accessories and parts from your
nearest dealer or service center. If your
dealer or service center can not supply an
accessory or part, either contact your near-
est Parts Central (listed in the separate Au-
thorized Service Center booklet) or call
DESA International's Parts Department at
1-800-972-7879 for referral information.
You can also write to the address listed on
the back page of this manual.
Hose: LPA1000 - For 100,000
Btu/Hr Model
A 10 foot hose for locating heater further
away from propane tank(s).
Regulator: LPA2150 - For
100,000 Btu/Hr Model
Hose and Regulator Assembly:
LPA3100 - For 100,000 Btu/Hr
Model
Fuel Gas Connector: LPA4020 -
For All Models
A POL adapter with excess-flow
TECHNICAL
SERVICE
You may have further questions about this
heater. If so, contact DESA International's
Technical Service Department at 1-800-
323-5190.
You can also visit DESA International's
Technical Service web site at
Ignitor
www.desatech.com.
Electrode
102370-01H
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