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V E N T - F R E E   G A S   H E A T E R   S E R V I C E   M A N U A L

PILOT

GRH/P 007A

Problem

Ignitor sparks, but pilot will not light

Possible Causes

1.

Gas supply is turned off and/or manual
shut-off valve is closed

2.

Air in pilot line

3.

Dirty pilot assembly

4.

Insufficient gas supply pressure

Procedures

1. Check to be sure that the gas supply to the

heater is turned on. Be sure the manual
shut-off valve is open.

2. Be sure that the pilot line has been purged

for sufficient time to remove air from the
line.

The pilot line can be purged by turning the
control knob to the “PILOT” position and
fully depressing the knob. Ignition should
be attempted every 30 seconds until a
correct pilot flame is established. See
Owner’s Manual for correct ignition proce-
dure.

3. Check the pilot assembly for dirt, cobwebs

or other restrictions. Be sure the heater
has been turned off. First remove the wire
clip from the bi-metal strip located on the
pilot tube (see Figure 14). Remove the
brass cover and clean any dust or cob-
webs from the air/gas mixing chamber.
Reassemble the brass cover with the wire
clip and retest to see if a correct pilot flame
is established. If the above procedure
does not give satisfactory results, discon-
nect the pilot assembly and remove it from
the heater. Blow out the pilot tube from
both directions to remove any restrictions.
Also inspect the pilot line tubing for dirt,
kinks in the line or other restrictions. Re-
place the pilot assembly if necessary.

4. Check gas supply pressure at the pres-

sure tap on the manual shut-off valve
below the heater and at the manifold pres-
sure tap next to the control valve (see
Figure 21, page 17) to be sure that enough
pressure is available to the system ac-
cording to the 

“SPECIFICATIONS” sec-

tion on page 13. If the inlet pressure is
correct and the manifold pressure is low,
replace the regulator, control valve or inlet
tubing as required.

Problem

Bi-metal Strip

Brass Cover

Wire Clip

Figure 14. Ignitor/Pilot Assembly

Summary of Contents for VP2600

Page 1: ...s supplier s instructions If you cannot reach your gas supplier call the fire department WARNING Improper installation ad justment alteration service or mainte nance can cause injury or property dam a...

Page 2: ...tion Gas Type 8 Location Safety Precautions 8 Gas Supply Installation 9 Propane Installation 10 External Regulators 10 Section 6 Test Procedures Testing Gas Supply Line Connections 11 Testing Heater G...

Page 3: ...ny phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department 5 Never insta...

Page 4: ...Fan Kit GA2100A The fan accessory pro vides better heat distribution in the room 2 Floor Mounting Stand GA4000 3 plaque models and GA4010 5 plaque models The floor stand allows the heater to be instal...

Page 5: ...e held down at least 10 seconds until the thermocouple is heated enough to hold the valve open Once the pilot flame is established the control knob can be released and turned to any of the operating p...

Page 6: ...mo couple provides a low level electric current to an electromagnetic plunger in the control valve This low level electric current keeps the plunger open allowing gas to flow to the pilot and the main...

Page 7: ...alling vent free gas heaters Source Information Controls Inc P O Box 52275 Raleigh North Carolina 1 800 334 5886 Item ESL 16 Approximate Cost 14 00 DESA International P O Box 90004 Bowling Green KY 42...

Page 8: ...bustible surfaces MUST NOT be less than shown in Figure 7 These are absolute minimum clearances Greater clearances should be allowed if possible The heater can also be mounted to an optional floor mou...

Page 9: ...ult in clogged valves IMPORTANT Pressure regulator must be held with wrench when connecting gas piping and or fittings to pressure regulator External Regulator For LP Heaters Only Drip Leg Trap Figure...

Page 10: ...cult for freezing rain or sleet to plug a vent that has been installed pointing down Older style vents may not have the lip and are far less resistant to freeze up problems see Figure 10 A regulator w...

Page 11: ...ely WARNING NEVER USE AN OPEN FLAME TO CHECK FOR A LEAK Apply a solution of liquid detergent and water to all connections The formation of bubbles indicate leaks that must be corrected Pressure Testin...

Page 12: ...tion 230 ma maximum Drop out current specification 80 ma minimum If the control valve operates correctly during the above test it is likely that the problem is the result of a bad thermocouple 7 Conne...

Page 13: ...put Maximum 16 000 16 000 26 000 26 000 Minimum 6 000 6 000 6 000 11 000 Fresh Air Opening Minimum 16 sq in 16 sq in 26 sq in 26 sq in MODELS VN1800 VN1800T VN3000 VN3000T VN1800A VN1800TA VN3000A VN3...

Page 14: ...e Causes 1 Ignitor cable 2 Ignitor electrode position and or cleanli ness 3 Ignitor electrode body cracked 4 Control knob not fully depressed 5 Control valve malfunction Procedures 1 Check the ignitor...

Page 15: ...re clip from the bi metal strip located on the pilot tube see Figure 14 Remove the brass cover and clean any dust or cob webs from the air gas mixing chamber Reassemble the brass cover with the wire c...

Page 16: ...at the room is properly ventilated See SPECIFICATIONS page 13 for the minimum fresh air openings required If necessary instructtheusertoslightlyopen a window for proper ventilation 4 Be sure that stro...

Page 17: ...fold pressure with a manometer to be sure that the regulator is not defective See SPECIFICATIONS on page 13 for the model you are servicing Third check the pilot assembly and pilot line to be sure tha...

Page 18: ...the outside of the tank The ice acts as an insulator and can reduce the evaporation rate and the pressure to your heater If an im proper tank size is causing a low supply pressure to the heater con t...

Page 19: ...r and gas supply connec tions for leaks See procedures under Testing Gas Supply Line Connections and Testing Heater Gas Connections on page 11 of this service manual 2 If all gas connections inside an...

Page 20: ...as malfunctioning type of gas used propane or natural gas purchase date In most cases we will ask you to return the defective part to the factory Parts Not Under Warranty Contact authorized dealers of...

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