Honeywell Burner Q314 User Manual

TRADELINE  
Q314 and Q327A  
Pilot Burners  
Application  
PilotburnersprovidemainburnerignitionforstandingpilotnaturalandLPgassystems.Usedwithathermocoupletoprovide  
automatic pilot safety control. Used with a thermopile in a self-powered system. See Table 1 for model specifications.  
TABLE 1—MODEL SPECIFICATIONS.  
Primary  
Aerated  
Type of  
Orifice  
Pilot Tip  
Type  
Model  
Includes  
Q314A  
No  
Insert  
Target  
Includes natural and LP gas orifices, 1/4 in.  
compression fitting, “F,” “K,” or “L” tip styles,  
“Bmountingbracket, andAmountingbracket  
adapter.  
Q327A  
Yes  
Spud  
Target  
Includes natural and LP gas orifices, 1/4 in.  
compression fitting, and “B” mounting bracket  
with screws.  
with an identical unit and position new pilot burner in the  
same location and orientation as the original pilot burner.  
2. Mountpilotburneronmainburner.Mountingsurfaces  
other than the main burner can shift, bend, or warp as furnace  
expands and contracts while operating. See Fig. 1.  
3. Mount pilot burner so the ignition flame remains  
properly positioned with respect to the main burner flame.  
See Fig. 2.  
4. Supply pilot flame with ample air free of combustion  
products.  
5. Do not impinge pilot flame on adjacent parts. Do not  
impinge main burner flame on pilot burner.  
6. Do not expose pilot flame to falling scale which could  
impair ignition of main burner.  
Installation  
WHEN INSTALLING THIS PRODUCT…  
1. Read these instructions carefully. Failure to follow  
instructions can damage product or cause a hazardous condi-  
tion.  
2. Check ratings given in instructions and on product to  
make sure product is suitable for your application.  
3. Make sure installer is a trained, experienced service  
technician.  
4. After completing installation, use these instructions to  
check out product operation.  
7. Donotexposepilotburnertomainburnerrolloutwhile  
igniting or extinguishing.  
8. Do not expose pilot flame to drafts that push or pull  
pilot flame away from the thermocouple or thermopile.  
WARNING  
FIRE OR EXPLOSION HAZARD  
CAN CAUSE PROPERTY DAMAGE,  
SEVERE INJURY, OR DEATH  
Follow these warnings exactly.  
Fig. 1—Mount pilot burner on main burner.  
1. Disconnect power supply before wiring to pre-  
vent electrical shock or equipment damage.  
2. To avoid dangerous accumulation of fuel gas,  
turn off gas supply at appliance service valve  
before starting installation and perform Gas  
Leak Test after completion of installation.  
3. Do not bend pilot tubing at the control or pilot  
after compression nut has been tightened. Gas  
leakage at the connection may result.  
PILOT  
BURNER/GENERATOR  
MUST BE RIGIDLY  
POSITIONED  
Follow appliance manufacturer’s instructions if avail-  
able; otherwise, use instructions provided below.  
RELATIVE TO  
MAIN BURNER  
M1263  
LOCATION  
1. Position pilot burner for easy access, observation, and  
lighting. In replacement applications, replace pilot burner  
J. H. • Rev. 12-92 • © Honeywell Inc. 1992 • Form Number 69-0519—3  
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Fig. 7—Changing spud and insert orifices.  
Fig. 6—Bleed gas tube installation.  
THIS DIMENSION SHOULD BE  
INSERT  
ORIFICE  
MAXIMUM OF 3/8 INCH [9.5 mm]  
WHEN BLEED TUBE IS IN FINAL  
POSITION.  
CROSS SECTION  
BLEED TUBE CLIP  
INSERT  
ORIFICE  
1/8 IN. STEEL TUBING  
M3284  
SPUD  
ORIFICE  
CHANGE INSERT ORIFICES (See Fig. 7)  
M27083  
1. Disconnect pilot tubing from the pilot burner and  
remove insert orifice. Sometimes a light force is required to  
remove the orifice.  
2. Cut off old compression fitting.  
Startup and Checkout  
PERFORM GAS LEAK TEST  
NOTE: When replacing an orifice, cut off old compression  
fitting and replace with a new compression fitting. Never  
use old compression fitting as it may not provide a gas-  
tight seal. See Fig. 3.  
WARNING  
FIRE OR EXPLOSION HAZARD  
3. Square off end of pilot tubing and remove all burrs.  
4. Insert new compression nut over pilot tubing and slide  
out of the way.  
5. Insert new orifice into pilot burner and push pilot  
tubing into the pilot burner until it bottoms.  
6. Whileholdingtubingallthewayin, slidecompression  
fitting into place and engage threads. Turn until finger tight.  
7. Using a wrench, tighten compression fitting one turn  
beyond finger tight.  
CAN CAUSE PROPERTY DAMAGE,  
SEVERE INJURY, OR DEATH  
Check for gas leaks with soap and water solution  
any time work is done on a gas system.  
GAS LEAK TEST:  
1. Ensure that gas supply is turned on at the appliance  
service valve.  
2. Paint pipe connections upstream of pilot burner with  
rich soap and water solution. Bubbles indicate gas leak.  
3. If leak is detected, tighten pipe connections.  
4. Stand clear of main burner while lighting to prevent  
injurycausedfromhiddenleakswhichcouldcauseflashback  
in the appliance vestibule. Light main burner.  
5. With main burner in operation, paint pipe joints (in-  
cluding adapters) and gas control inlet and outlet with rich  
soap and water solution.  
CHANGE SPUD ORIFICES (See Fig. 7)  
1. Disconnect pilot tubing from orifice.  
2. Unscrew old spud orifice and discard.  
3. Cut off old compression fitting.  
NOTE: When replacing an orifice, cut off old compression  
fitting and replace with a new compression fitting. Never  
use old compression fitting as it may not provide a gas-  
tight seal. See Fig. 3.  
6. If another leak is detected, tighten adapter screws,  
joints, and pipe connections.  
7. Replace part if leak can not be stopped.  
4. Square off end of pilot tubing and remove all burrs.  
5. Insert new compression nut over pilot tubing and slide  
out of the way.  
6. Insert new orifice into pilot burner and tighten se-  
curely.  
7. Push pilot tubing into orifice until it bottoms.  
8. Whileholdingtubingallthewayin, slidecompression  
fitting into place and engage threads. Turn until finger tight.  
9. Using a wrench, tighten compression fitting one turn  
beyond finger tight.  
ADJUST PILOT FLAME  
The pilot flame should envelop 3/8 to 1/2 in. [10 to  
13 mm] of the thermocouple or thermopile tip. See Fig. 8. To  
adjust pilot flame:  
1. Remove pilot adjustment cover screw from gas con-  
trol.  
2. Turn inner pilot adjustment screw clockwise  
to  
decrease or counterclockwise to increase pilot flame.  
3. Always replace pilot adjustment cover screw and  
tighten firmly after completing adjustment to ensure proper  
operation.  
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Fig. 9—Examples of unsatisfactory pilot  
flames.  
Fig. 8—Thermocouple or thermopile tip must be  
in pilot flame.  
CAUSE  
APPEARANCE  
SMALL BLUE FLAME  
PROPER  
FLAME  
ADJUSTMENT  
CHECK FOR LACK OF GAS FROM:  
• CLOGGED ORIFICE FILTER  
• CLOGGED PILOT FILTER  
3/8 TO 1/2 INCH  
[10 TO 13 MILLIMETRES]  
• LOW GAS SUPPLY PRESSURE  
• PILOT ADJUSTMENT AT MINIMUM  
THERMOCOUPLE  
OR THERMOPILE  
LAZY YELLOW FLAME  
CHECK FOR LACK OF AIR FROM:  
• LARGE ORIFICE  
• DIRTY LINT SCREEN, IF USED  
M1973A  
• DIRTY PRIMARY AIR OPENING,  
IF THERE IS ONE  
• PILOT ADJUSTMENT AT MINIMUM  
WAVING BLUE FLAME  
CHECK FOR:  
IGNITE PILOT BURNER  
1. Before lighting pilot burner, turn thermostat to its  
lowest setting. Wait for unburned gas to vent.  
• EXCESSIVE DRAFT AT PILOT  
LOCATION  
• RECIRCULATING PRODUCTS  
OF COMBUSTION  
NOTE: LP gas is heavier than air and will not vent upward.  
SmellforLPgasnexttofloor.Ifyousmellgas,shutoffthe  
main valve in the gas piping, or, ON LP, AT THE TANK.  
Perform Gas Leak Test to recheck all connections.  
CHECK FOR:  
NOISY LIFTING BLOWING FLAME  
• HIGH GAS PRESSURE  
2. Light pilot burner according to appliance manu-  
facturer’s instructions.  
HARD SHARP FLAME  
THIS FLAME IS CHARACTERISTIC  
OF MANUFACTURED GAS  
CHECK FOR:  
• HIGH GAS PRESSURE  
Service  
• ORIFICE TOO SMALL  
M3272  
WARNING  
FIRE OR EXPLOSION HAZARD  
CAN CAUSE PROPERTY DAMAGE,  
SEVERE INJURY, OR DEATH  
PerformGasLeakTestanytimeworkisdonetothe  
system.  
PILOTSTAT SAFETY CONTROL POWER UNIT  
FAILURE  
1. Ensure pilot flame is properly adjusted.  
2. Ensure power unit connections clean and tight.  
3. If power unit still fails to hold in, use the W129A  
Millivoltmeter to obtain the open and closed circuit voltage  
generated by the thermocouple or generator.  
4. Compare measured open and closed circuit voltage  
values to Acceptable Range Charts in W129A Manual.  
5. If W129A Millivoltmeter or other meter is not avail-  
able, replace thermocouple or thermopile. If this does not  
correct the condition, replace power unit.  
PILOT OUTAGE  
1. If pilot flame goes out during normal operation, but is  
properly adjusted, recheck Mounting and Location instruc-  
tions on page 1.  
2. If all mounting and location instructions are followed  
but pilot continues to go out, construct shielding to protect  
pilot flame from main burner ignition and extinction and  
drafts. See Fig. 9.  
THERMOCOUPLE OR THERMOPILE  
PERFORMANCE  
3. Check pilot flame characteristics.  
Thermocouples and thermopiles require proper tempera-  
ture differential between the hot-junction (tip) and cold-  
junction (base) to provide satisfactory operation of gas con-  
trols. Thermocouples and thermopiles perform less effec-  
tively when exposed to excessive cold-junction or hot-  
junction temperatures.  
Check the pilot flame with the main burner operating.  
Ensure the pilot flame continuously covers the tip of  
the thermocouple or thermopile, the spark gap and  
3/8 to 1/2 in. [10 to 13 mm] of the ground rod. See  
Fig. 8.  
Ensure the pilot flame is blue (a yellow tipped flame is  
acceptable on LP systems), soft and steady. See Fig. 9  
forexamplesofpossiblepilotflameproblemsandtheir  
causes.  
Excessive cold-junction temperatures can be caused by  
heat radiation from adjacent surfaces or high ambient air  
temperatures. Excessive cold-junction temperatures can be  
eliminated by shielding the pilot flame, see Fig. 10, or  
constructing a baffle to direct secondary air over the pilot  
burner base.  
Excessivehot-junctiontemperaturescanbeeliminatedby  
proper pilot flame adjustment. To adjust pilot flame, see  
Adjust Pilot Flame section.  
If pilot burner is damaged, replace it with an identical  
pilot burner and mount and position in the same  
location and orientation.  
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3. Turn pilot gas adjustment screw counterclockwise  
slightly.  
Fig. 10—Proper shielding of pilot flame.  
4. Relight pilot burner. The power unit should hold in.  
5. Turn gas control knob to ON position and set thermo-  
stattemperaturesettingaboveroomtemperature.Mainburner  
shouldlightwithinfoursecondswithoutflamerollout. Ifnot,  
check pilot mounting and location instructions in Location  
section and repeat Pilot Turndown Test.  
6. Readjust pilot burner flame. See Adjust Pilot Flame  
section.  
EFFECTIVE IGNITION TEST (750 mV SYSTEMS)  
The Effective Ignition Test assures that the pilot flame  
ignitesthemainburnerwithinfoursecondsfromthetimegas  
reaches the main burner. In this test, the pilot flame is just  
sufficient to open the main gas valve.  
1. Light the main burner according to the appliance  
manufacturer’s instructions and allow to burn at least five  
minutes.  
TYPICAL  
SHIELD  
M1273  
2. Remove one thermostat lead (TH) at the gas control  
terminal.  
3. Using the pilot gas adjustment screw, decrease the  
pilot flame until it begins to pull away from the thermopile.  
Allow thermopile to cool for one minute.  
4. Temporarily jumper the thermostat terminals (TH) on  
the gas control.  
5. If the main burner ignites, reduce the pilot flame by  
turning the pilot adjustment screw 1/4 turn at a time until the  
valve fails to pull in. Allow the thermocouple to cool at least  
one minute between each reduction in the pilot flame level.  
6. Increase the pilot flame just enough to pull in the gas  
control main valve.  
PILOT TURNDOWN TEST  
(30 mV safety control systems)  
The Pilot Turndown Test assures that the pilot flame  
ignitesthemainburnerwithinfoursecondsfromthetimegas  
reaches the main burner. In this test, the pilot flame is just  
sufficient enough to hold in the power unit or just above the  
point of flame extinction (whichever occurs at a higher pilot  
gas flow rate).  
1. With the pilot and main burner operating, shut off the  
main burner by either lowering the thermostat temperature  
settingorturningthegascontrolknobtothePILOTposition.  
7. Jumper the thermostat terminals. The main burner  
should light within four seconds and without flame roll-out.  
If it does not, check the Location and Mounting instructions  
on page 1 and repeat steps 1 through 6.  
8. If main burner still does not light, replace thermopile  
and repeat steps 1 through 6.  
9. Remove the jumper to shut off the main burner.  
10. Readjust pilot burner flame. See Adjust Pilot Flame  
section.  
11. Reconnect the thermopile lead and ensure all connec-  
tions are correct and the system is functioning properly.  
NOTE: If using a Honeywell W129A Millivoltmeter, turn  
the pilot gas adjustment screw until the thermocouple  
open circuit voltage is 2 mV. Omit steps 2,3, and 4 and  
proceed with step 5.  
2. Turnthep ilotgasadjustmentscrewclockwise until  
the pilot begins to decrease in size. Then, turn the pilot gas  
adjustment screw clockwise  
1/4 turn a time (waiting  
one minute between each turn to allow the thermocouple to  
cool)untilsafetyshutoffpowerunitjustdrops,causingsafety  
shutdown.  
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Home and Building Control  
Honeywell Inc.  
1985 Douglas Drive North  
Golden Valley, MN 55422  
Home and Building Control  
Honeywell Limited—Honeywell Limitée  
740 Ellesmere Road  
Helping You Control Your World  
Scarborough, Ontario  
QUALITY IS KEY  
M1P 2V9  
Printed in U.S.A.  
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