Desa NTH100 - Manual (Page 13)

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OWNER’S MANUAL
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 page 8).
2. Use 1/8" allen wrench to loosen set-
screw which holds fan to motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using a soft cloth moistened
with kerosene or solvent.
5. Dry fan thoroughly.
6. Replace fan on motor shaft. Place fan
hub flush with end of motor shaft (see
Figure 30).
7. Place setscrew on flat of shaft. Tighten
setscrew firmly (40-50 inch-pounds/
4.5-5.6 n-m).
8. Replace fan guard and upper shell.
Motor
Shaft
Setscrew
Figure 29 - Fan, Motor Shaft, and Setscrew
Location
Motor
Shaft
Fan
Setscrew
Figure 30 - Fan Cross Section
Output Rating (Btu/Hr) 35,000 50,000 70,000 100,000 150,000
Fuel Use Only Kerosene or No. 1 Fuel Oil
Fuel Tank Capacity
(U.S. Gal./Liters)
3.0/11.4 5.0/18.9 5.0/18.9 9.0/34 13.5/51.1
Fuel Consumption
(Gal. Per Hr./
Liters Per Hr.)
.26/1.0 .37/1.40 .49/1.85 .70/2.7 1.1/4.1
Electric Requirements 230 V/50 Hz (Same All Models)
Amperage (Normal Run) .8 1.0 1.0 1.2 1.2
Hot Air Output
(CFM/CMM)
140/4 205/5.8 225/6.4 425/12 500/14.2
RPM 1425 2850 2850 2850 2850
SPECIFICATIONS
Fan
Flush
SERVICE
PROCEDURES
Continued
WIRING DIAGRAMS
Figure 31 - Wiring Diagram
R
B
C
D
A
B 1 1a
230 V~/50 Hz
Green-Yellow
Green-Yellow
Ignitor
Photocell
Spark
Plug
Flame-Out
Control
Reset
Button
White
White White
Orange
Motor
Red Red
Red
Brown
Black
Black
Black
Blue White
Blue RFI Filter
ON/Off Switch
Terminal
Board