Honeywell Q314, Q327A User Manual
TRADELINE
Q314 and Q327A
Pilot Burners
Application
Pilot burners provide main burner ignition for standing pilot natural and LP gas systems. Used with a thermocouple to provide
automatic pilot safety control. Used with a thermopile in a self-powered system. See Table 1 for model specifications.
TABLE 1—MODEL SPECIFICATIONS.
Model Aerated Orifice Type Includes
Q314A No Insert Target Includes natural and LP gas orifices, 1/4 in.
Q327A Yes Spud Target Includes natural and LP gas orifices, 1/4 in.
Primary Type of Pilot Tip
compression fitting, “F,” “K,” or “L” tip styles,
“B” mounting bracket, and “A” mounting bracket
adapter.
compression fitting, and “B” mounting bracket
with screws.
Installation
WHEN INSTALLING THIS PRODUCT…
1. Read these instructions carefully. Failure to follow
instructions can damage product or cause a hazardous condition.
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.
WARNING
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE,
SEVERE INJURY, OR DEATH
Follow these warnings exactly.
1. Disconnect power supply before wiring to prevent 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.
Follow appliance manufacturer’s instructions if avail-
able; otherwise, use instructions provided below.
LOCATION
1. Position pilot burner for easy access, observation, and
lighting. In replacement applications, replace pilot burner
with an identical unit and position new pilot burner in the
same location and orientation as the original pilot burner.
2. Mount pilot burner on main burner. Mounting surfaces
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.
7. Do not expose pilot burner to main burner rollout while
igniting or extinguishing.
8. Do not expose pilot flame to drafts that push or pull
pilot flame away from the thermocouple or thermopile.
Fig. 1—Mount pilot burner on main burner.
PILOT
BURNER/GENERATOR
MUST BE RIGIDLY
POSITIONED
RELATIVE TO
MAIN BURNER
M1263
J. H. • Rev. 12-92 • © Honeywell Inc. 1992 • Form Number 69-0519—3
Fig. 2—Location of pilot burner.
ATTACHMENT NUT DESIGN
1. Insert thermocouple or thermopile tip into hole or
barrel provided beneath pilot burner. See Figs. 4 and 5.
2. Engage attachment nut threads and tighten until thermocouple or thermopile is locked into place.
PILOT BURNER/
IGNITION-
SENSOR
JUST RIGHT
IGNITION
FLAME JUST
MISSES
MAIN BURNER
PILOT BURNER/
IGNITION-
SENSOR
TOO LOW
IGNITION
FLAME WILL
IMPINGE ON
MAIN BURNER
PILOT BURNER/
IGNITION-
SENSOR
TOO HIGH
MAIN BURNER
FLAME WILL
IMPINGE ON
IGNITION-
SENSOR
M3285
CONNECT PILOT GAS TUBING
1. Cut tubing to desired length and bend as necessary for
routing to pilot burner. Do not make sharp bends or deform
tubing. Do not bend tubing at control after compression nut
has been tightened, as this can result in gas leakage at
connection.
2. Square off and remove burrs from end of tubing.
3. Push tubing into compression nut clearance hole until
tubing bottoms.
NOTE: When replacing a pilot burner or orifice, cut off old
compression fitting and replace with new compression
fitting provided with new pilot burner. Never use old
compression fitting as it may not provide a gas-tight seal.
See Fig. 3.
4. While holding tubing all the way in, engage threads
and turn until finger tight.
5. Using a wrench, turn compression nut one turn beyond
finger tight. DO NOT OVERTIGHTEN.
6. Connect other end of tubing to gas control according to
gas control manufacturer instructions.
Fig. 4—Installing thermocouple or thermopile.
PILOT BURNER
ASSEMBLY
THERMOCOUPLE
OR THERMOPILE
PUSH-IN
CLIP
OPTIONAL
ATTACHMENT
M3286
NUT
Fig. 5—Installing Q390 Thermocouple.
SCREW-IN TYPE
PILOT BURNER
ASSEMBLY
THERMOCOUPLE
Fig. 3—Always use new compression fitting.
PILOT BURNER BODY
FITTING BREAKS OFF
AND CLINCHES TUBING
AS NUT IS TIGHTENED
TIGHTEN NUT ONE
TURN BEYOND
FINGER TIGHT
TO GAS CONTROL
M3295
INSTALL THERMOCOUPLE OR THERMOPILE
PUSH-IN DESIGN
1. Insert thermocouple or thermopile tip into hole or
barrel provided beneath pilot burner. See Fig. 4.
2. Push in firmly until thermocouple or thermopile is
locked into place.
ADAPTER
ATTACHMENT NUT
M3269
INSTALL BLEED GAS TUBING (if used):
1. Route bleed gas tubing from bleed tapping on gas
control to the pilot burner.
2. Push clip into place. See Fig. 6.
3. Insert bleed gas tubing until 3/8 inch [10 mm] of tubing
is above pilot burner bracket. Tip of bleed gas tubing must not
extend into pilot flame.
INSTALL “A” MOUNTING BRACKET ADAPTER
(optional)
To convert mounting bracket from “B” mounting bracket
to “A” mounting bracket, install the “A” mounting bracket
adapter to the pilot burner mounting bracket. Then install
pilot burner to main burner.
2
Fig. 6—Bleed gas tube installation.
Fig. 7—Changing spud and insert orifices.
THIS DIMENSION SHOULD BE
MAXIMUM OF 3/8 INCH [9.5 mm]
WHEN BLEED TUBE IS IN FINAL
POSITION.
BLEED TUBE CLIP
1/8 IN. STEEL TUBING
M3284
CHANGE INSERT ORIFICES (See Fig. 7)
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.
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 gastight seal. See Fig. 3.
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. While holding tubing all the way in, slide compression
fitting into place and engage threads. Turn until finger tight.
7. Using a wrench, tighten compression fitting one turn
beyond finger tight.
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 gastight seal. See Fig. 3.
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 securely.
7. Push pilot tubing into orifice until it bottoms.
8. While holding tubing all the way in, slide compression
fitting into place and engage threads. Turn until finger tight.
9. Using a wrench, tighten compression fitting one turn
beyond finger tight.
INSERT
ORIFICE
CROSS SECTION
M27083
SPUD
ORIFICE
INSERT
ORIFICE
Startup and Checkout
PERFORM GAS LEAK TEST
WARNING
FIRE OR EXPLOSION HAZARD
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
injury caused from hidden leaks which could cause flashback
in the appliance vestibule. Light main burner.
5. With main burner in operation, paint pipe joints (including adapters) and gas control inlet and outlet with rich
soap and water solution.
6. If another leak is detected, tighten adapter screws,
joints, and pipe connections.
7. Replace part if leak can not be stopped.
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.
3 69-0519—3
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