Dayton 3VG81 - Manual (Page 6)

Dayton Operating Instructions and Parts Manual 3VG81
6
Dayton Propane
Construction Heater ®
Operation (Continued)
Storage
Disconnect heater
from propane
supply tank(s).
1. Store propane tank(s) in safe manner.
See Chapter 5 of Standard for Storage
and Handling of Liquefied Petroleum
Gases, ANSI/NFPA 58. Follow all local
codes.
2. Place plastic cover caps over brass
fittings on inlet connector and
hose/regulator assembly.
3. Store in dry, clean, and safe place. Do
not store hose/regulator assembly
inside heater combustion chamber.
4. 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 foreign
objects.
Maintenance
Never service
heater while it is
plugged in, connected to propane
supply, operating, or hot. Severe burns
and electrical shock can occur.
1. Keep heater clean. Clean heater
annually or as needed to remove 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. Inspect hose/regulator assembly before
each use. If hose is highly worn or cut,
replace.
4. Have heater inspected yearly by a
qualified service agency.
5. Keep inside of heater free from
combustible and foreign objects.
Never service
heater while it is
plugged in, connected to propane
supply, operating, or hot. Severe burns
and electrical shock can occur.
Service Procedures
Figure 6 - Upper Shell Removal
UPPER SHELL REMOVAL
1. Remove screws along each side of
heater. These screws attach upper and
lower shells together.
2. Lift or slide upper shell off.
3. Remove fan guard.
Fan
Figure 7 - Fan, Motor Shaft, and Setscrew
Location
Figure 8 - Fan Cross Section
Setscrew
Hub
Motor shaft
Setscrew
Motor Shaft
Fan
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 Upper Shell
Removal).
2. Use 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 8).
7. Place setscrew on flat of shaft. Tighten
setscrew firmly (40-50 inch-pounds).
8. Replace fan guard and upper shell.
TO STOP HEATER
1. Tightly close propane supply valve on
propane tank(s).
2. Wait a few seconds. Heater will burn
gas left in supply hoses.
3. Turn on/off switch to the OFF position.
4. Unplug heater.