Desa AT Series - Manual (Page 7)

103018-01G
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SERVICE PROCEDURE
Cleaning Fan (Cont.)
SPECIFICATIONS
ACCESSORIES
TECHNICAL SERVICE
SERVICE PUBLICATIONS
10. Holding mounting bolt, carefully reach through fan blades into
rear of heater. Be careful not to damage fan pitch. Insert bolt
through motor mount and shell. With free hand, attach nut fin-
ger tight. Repeat process for other mounting hole.
11. Use 1/8" hex wrench to loosen setscrew which holds fan to
motor shaft (see Figure 9).
12. Slip fan off motor shaft.
13. Clean fan using soft cloth moistened with kerosene or solvent.
14. Dry fan thoroughly.
15. Replace fan on motor shaft. Make sure setscrew is touching
back of flat surface on motor shaft (see Figure 10).
16. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50
inch-pounds).
17. Remove two nuts and bolts securing motor mount to shell.
18. Pull motor and fan from shell. Turn motor and fan around.
Carefully place back in shell. Note: Fan will go into shell first.
19. Line up mounting holes in shell with holes on motor mount.
Replace four bolts through shell and motor mount. Insert bolts
from outside of heater. Tighten nuts firmly.
20. Route motor wires through hole in bottom of shell (see Figure 7,
page 6).
21. Connect motor wires as follows (see Figure 6, page 6):
• white wire—to terminal board.
Note: Attach to empty connector on white wire side of ter-
minal board.
• black wire—to terminal board.
Note: Attach to empty connector on black wire side of ter-
minal board.
• blue wire—to thermal switch wire
• orange wire—to solenoid valve
• green wire—to grounding screw on shell
22. Replace side cover.
23. Replace fan guard.
SERVICE PROCEDURE
Continued
Fan
Setscrew
Motor shaft
Figure 9 - Fan, Motor Shaft, and
Setscrew Location
Motor
Shaft
Setscrew
Hub
Fan
Figure 10 - Fan Cross
Section
SPECIFICATIONS
Output Rating (Btu/Hr) ...................... 225,000 to 375,000
Fuel .................................................... Propane/LP Vapor Only
Fuel Consumption
Gallons/Hour .................................. 2.5 Min/4.0 Max
Pounds/Hour .................................. 10.4 Min/17.4 Max
Supply Pressure To Regulator
Minimum (for input adjustment) ... 25 psig
Maximum ....................................... Tank Pressure
Regulator Outlet Pressure .................. 7-20 psig
Hot Air Output (CFM) ...................... 1500
Motor ................................................. 1725 RPM, 1/5 HP
Electric Input ..................................... 120 V/60 Hz
Amperage .......................................... 4.2
Ignition .............................................. Electronic Direct Spark, D.S.I.
Weight (Pounds)
Heater ............................................. 52
Shipping ......................................... 57
Size - L x W x H (Inches)
Carton ............................................. 37 x 15.25 x 20.75
Heater ............................................. 35 x 13 x 19.5
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 nearest Parts Central (listed in the
separate Authorized Service Center booklet) or call DESA Interna-
tional at 1-866-672-6040 for referral information. You can also
write to the address listed on the back page of this manual.
Regulator: LPA2020
Hose and Regulator Assembly: LPA3030
Fuel Gas Connector: LPA4020
A POL adapter with excess-flow check valve.
Thermostat: HA1210
TECHNICAL SERVICE
You may have further questions about this heater. If so, contact DESA
International’s Technical Service Department at 1-866-672-6040 or
visit our website at
www.desatech.com. When contacting DESA,
please have your model and serial numbers of your heater ready.
SERVICE PUBLICATIONS
You can receive an Illustrated Parts List free of charge. Send your
request and a self-addressed, stamped envelope to DESA Interna-
tional (address on back page). Be sure to include the heater model
number. You can purchase a service manual for $5. Make check
payable to DESA International.