HDT Camfire CV125CG User manual

2
WARNING - SAFETY REQUIREMENTS
IMPORTANT
Read and understand this instruction manual before starting or servicing this heater.
WARNING!
FIRE, EXPLOSION, CARBON MONOXIDE POISONING
Improper use of this heater can result in serious bodily injury due to hazards of fire and explosion,
carbon monoxide poisoning, burn and electrical shock.
WARNING!
CARBON MONOXIDE POISIONING
The heat exchanger must be inspected annually by a qualified service personnel for leaks which could allow
dangerous carbon monoxide gas to enter the shelter. Failure to due so, could cause severe injury or death.
WARNING!
FIRE, EXPLOSION, CARBON MONOXIDE POISONING
Improper adjustment of the air pump can over fire the heater and as a result, compromise the heat
exchanger which can cause serious bodily injury due to hazards of fire and explosion, carbon
monoxide poisoning.
WARNING!
FIRE, EXPLOSION
Use only Kerosene, Diesel or Number 1 Fuel Oil, or JP8 can be used for extreme cold conditions.
Never burn gasoline, naphtha, paint thinners, alcohol or other volatile fuels. Fill fuel tank or move
heater only when heater is shut off.
WARNING!
FIRE, EXPLOSION
Use only in areas free of flammable vapor or high dust content. Never use heater where gasoline,
paint thinner or other highly flammable vapors are present.

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WARNING!
FIRE, EXPLOSION
Fully drain and ventilate fuel tank before transporting. Fuel tank vent must be open during transport
and storage.
WARNING!
ROTATING MACHINERY
When used with thermostat, heater may start at any time. Do not open access door while heater is
running or plugged in. Remove all power prior to service
WARNING!
SHOCK HAZARD
Use only with electrical voltage and frequency specified on model plate. Do not perform any service
with heater plugged in.
WARNING!
HIGH VOLTAGE
The ignition transformer develops 10,000 volts. Serious injury or death may occur if personnel come
in contact with high voltage lead.
WARNING!
FIRE, EXPLOSION
Do not operate heater without output duct, P/N CAH-1015, properly installed. Ensure hot air outlet is at
least 1.5 meters from combustible materials. Ensure ducts are free from obstructions and sharp
bends.
WARNING!
HOT SURFACE
Parts of the heater become very hot when operating and immediately after operating. The exhaust can
reach temperatures in excess of 1000 degrees Fahrenheit. Severe burns may occur if the heater is not
allowed to cool down properly before servicing.

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5
INDEX
WARNING –SAFETY REQUIREMENTS ……………………………………………………………
2
SPECIFICATIONS ………………………………………………………………………………………
6
DESCRIPTION …………………………………………………………………………………………..
7
SECTION 1 –INTRODUCTION ……………………………………………………………………….
8
A. General ……………………………………………………………………………………………….
8
B. Principle of Operation
…………………………………………………………………………………
9
10
SECTION 2 –INSTALLATION AND OPERATION .………………………………………………...
A. To Prepare for Operation ………………………………………………………………………….
10
B. Electrical Supply ……………………………………………………………………………………
10
C. Starting the Heater …………………………………………………………………………………
10
D. Stopping the Heater ………………………………………………………………………………..
10
E. Start Up Procedure …………………………………………………………………………………
11
F. Venting Instructions ………………………………………………………………………………..
11
SECTION 3 –MAINTENANCE ………………………………………………………………………..
12
A. Fuel Tank Maintenance ……………………………………………………………………………
12
B. Air Filters …………………………………………………………………………………………….
12
C. Removal of Upper Shell …………………………………………………………………………...
13
D. Cleaning the Fan ……………………………………………………………………………………
14
E. Spark Plug …………………………………………………………………………………………...
14
F. Cleaning the Fuel Filter ……………………………………………………………………………
14
G. Burner removal, Cleaning & Replacement …………………………………………………….
15
H. Post Maintenance Assembly ……………………………………………………………………..
15
15
SECTION 4 –TROUBLE SHOOTING ………………………………………………………………..
16
A. General ……………………………………………………………………………………………….
16
B. Examination …………………………………………………………………………………………
16
C. Test Firing ……………………………………………………………………………………………
16
D. Trouble Shooting …………………………………………………………………………………...
16
TROUBLE SHOOTING CHART ………………………………………………………………………
17-20
SECTION 5 –SERVICE AND REPAIR ………………………………………………………………
21
A. General ……………………………………………………………………………………………….
21
B. Special Tools, Equipment and Supplies ……………………………………………………….
21
C. Thermostat Accessory …………………………………………………………………………….
21
D. Transformer ………………………………………………………………………………………….
21
E. Checking the Motor Starting Circuits …………………………………………………………..
22-24
F. Fan Service …………………………………………………………………………………………..
25
G. Fuel Filter Service ………………………………………………………………………………….
25
H. Burner Head Service ……………………………………………………………………………….
25
I. Air Pump Repair ……………………………………………………………………………………..
26
J. Disassembly …………………………………………………………………………………………
26
K. Replacing the Carbon Blades …………………………………………………………………….
26
L. Replacing the Rotor ………………………………………………………………………………..
26
M. Reassembly of the Air Pump …………………………………………………………………….
27
N. Adjustment of Pump Pressure …………………………………………………………………..
27
O. Reassembly of Heater ……………………………………………………………………………..
27
P. Heat Exchanger Service…………………………………………………………………………….
30
SECTION 6 - ILLUSTRATED PARTS LIST……………………………………………………………
31

6
Illustrations
Figure
Description
Page
1
Schematic of Operations ………………………………………………………….
8
2
Maintenance Points ………………………………………………………………..
12
3
Air Filters ……………………………………………………………………………..
13
4
Spark Plug …………………………………………………………………………...
14
5
Cleaning the Nozzle ………………………………………………………………..
15
6
Fabricated Test Probe ……………………………………………………………..
23
7
Wiring Diagram ……………………………………………………………………...
24
8
Fan Location ………………………………………………………………………...
25
9
Clearance of Rotor ………………………………………………………………….
27
10
Air Pump Pressure Adjustment ………………………………………………….
27