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40,000 BTU Forced Air H.S.I. Desa Oil Fired Heater
Model Numbers
Standard Thermostat
R40 R40T
REM40 REM40T
PK40 PK40T
UK40 UK40T
TK40 TK40T
N40 N40T
Key Part
No. Number Description
1 M51104-01 Handle
2 098511-67 Upper Shell (Service Part Will Be Black)
3 M11084-29 Screw, #10-16 x 3/4" (qty. 2)
4 M15823-27 Screw, #10-16 x 1 1/2" (qty. 6)
5 098512-58 Combustion Chamber
6 M10908-2 Screw, #6-32 x 3/8" (qty. 2)
7 103154-03 Photocell Bracket
8 M16656-24 Photocell Assembly
9 (See page 41) Burner Head Assembly
10 M11084-26 Screw, #10-16 x 3/8" (qty. 2)
11 103684-01 Fan
12 (See page 44) Motor and Pump Assembly
13 M51105-01 Fan Guard
14 098219-38 Power Cord
15 M11143-1 Strain Relief Bushing
16 NTC-4C Hex Lock Nut, 1/4-20 (qty. 2)
17 M11084-26 Screw, #10-16 x 3/8" (qty. 8)
18 M50631 Rubber Bumper (qty. 2)
19 097461-16 Side Cover (qty. 2)
20 101205-01 Motor Bracket
21 M50104-06 Bushing
22 M11271-8 Clip Nut (qty. 6)
23 M50104-02 Bushing
24 M11084-26 Screw, #10-16 x 3/8" (qty. 6)
25 M10908-14 Screw, #8-32 x 3/8"
26 098511-234 Lower Shell (Service Part Will Be Black)
27 M50814-06 Rubber Airline
28 079973-01 Fuel Line
29 M50876-04 Fuel Filter with bushing
30 M10990-3 Rubber Bushing
31 102349-01 PCB Support (qty. 5)
32 104068-02 Ignition Control Assembly
33 097702-01 Fuel Cap (Includes Gasket)
Key Part
No. Number Description
34 108088-01 Fuel Tank
35 M51108-01 Shell Heat-Shield
36 104458-01 Thermostat
37 M12461-18 Screw, #8-32 x 7/8"
38 104460-01 Thermostat Knob
39 WLE-2 Lock Washer, EXT #8
PARTS AVAILABLE - NOT SHOWN
103814-01 Wire Tie
M9900-170 Wire Assembly
Desa 40,000 BTU HSI
Pump Pressure Setting
BTU PSI
40 3.0
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