103887-01C
5
5
For more information, visit www.desatech.com
For more information, visit www.desatech.com
STORAGE
CAUTION: Disconnect heater from natural gas
supply.
MAINTENANCE
WARNING: Never service heater while it is plugged
in, connected to gas supply, operating, or hot. Severe
burns and electrical shock can occur.
1. Keep heater clean. Clean heater annually or as needed to re-
move dust and debris. If heater is dirty or dusty, clean heater
with a damp cloth.
2. Inspect heater before each use. Check connections for leaks.
Apply mixture of liquid soap and water to connections. Bubbles
forming show a leak. Correct all leaks at once.
3. Have heater inspected yearly by a qualified service agency.
4. Keep inside of heater free from combustible and foreign objects.
1. Place plastic cover cap over brass fitting on inlet connector.
2. Store in dry, clean, and safe place. Do not store hose inside
heater combustion chamber.
3. When taking heater out of storage, always check inside of
heater. Insects and small animals may place foreign objects in
heater. Keep inside of heater free from combustible and for-
eign objects.
STORAGE
MAINTENANCE
SERVICE PROCEDURES
Upper Shell Removal
Fan
Ignitor
FAN
IMPORTANT:
Remove fan from motor shaft before removing
motor from heater. The weight of the motor resting on the fan could
damage the fan pitch.
1. Remove upper shell (see column 1).
2. Use 1/8" hex wrench to loosen setscrew which holds fan to
motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using soft cloth moistened with kerosene or solvent.
5. Dry fan thoroughly.
6. Replace fan on motor shaft. Make sure setscrew is touching
back of flat surface on motor shaft (see Figure 6).
7. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50
inch-pounds).
8. Replace fan guard and upper shell.
SERVICE PROCEDURES
UPPER SHELL REMOVAL
1. Remove screws along each side of heater using 5/16" nut-driver.
These screws attach upper and lower shells together.
2. Lift or slide upper shell off.
3. Remove fan guard.
WARNING: Never service heater while it is plugged
in, connected to gas supply, operating, or hot. Severe
burns and electrical shock can occur.
Figure 4 - Upper Shell Removal
FAN CROSS SECTION LP-PFA/P 013
Fan
Hub
Setscrew
Motor
Shaft
FAN LP-PFA/P 023
Figure 5 - Fan, Motor Shaft, and Setscrew Location
Motor
Shaft
Fan
Setscrew
Figure 6 - Fan Cross Section
IGNITOR
1. Make sure gap between ignitor electrode and burner nozzle is
.13⁄.15". Access ignitor electrode from inside combustion cham-
ber. No other maintenance is needed for ignitor.
