resideo Q348U Universal Pilot Burner Installation Guide

Table of Contents

Installation GuideQ348UUniversal Pilot Burner

Cross Reference(Use only as a replacement for these Resideo pilots)\

Old Part #	Use Orifices	Compression Fitting	Bracket
Q348A1002	As Shipped	1/4 in.	No
Q348A1010	Brown Bag	1/4 in.	No
Q348A1101	As Shipped	1/4 in.	Yes
Q348Al226	Blue Bag	1/4 in.	No
Q34841275	White Bag	1/8 in.	No
Q34841333	As Shipped	1/8 in.	No
Q34841341	Brown Bag	1/8 in.	No
0348AAA	*	*	Yes
03484AB	*	*	No
Q348U1009	*	*	*

Key
Use Orifice**	As Shipped = NE22 (0.022 in) Natural gas Brown Bag = KR14 (0.014 in.) LP gas White Bag = KF24 (0.024 in.) Natural gas Blue Bag = A26 (0.026 in.) Natural gasColors refer to the color of the label on the bag. Check Application

NoteThis pilot replaces only Resideo batwing-style intermittent pilot burners without an integral ignition and sensing wire.

For standard hood-style intermittent pilot burners, see the Q345U or Q3451U.
For standing pilot applications with standard hood style pilot, burners see the Q314U.The specifications given here do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications.This product is tested and calibrated under closely controlled conditions, and some minor differences in performance should be expected if those conditions are changed.

WHEN INSTALLING THIS PRODUCT…

Read these instructions carefully. Failure to follow instructions can damage equipment or cause a hazardous condition.
Check cross-reference in the installation guide or box to verify the pilot is suitable for your application.
The installer must be a trained, experienced service technician.
After completing the installation, use these instructions to check out product operation.

WARNINGFIRE OR EXPLOSION HAZARD. CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH.Follow these warnings exactly:

Disconnect power supply before wiring to prevent electrical shock or equipment damage.
To avoid the dangerous accumulation of fuel gas, turn off the gas supply at the appliance service valve before starting the installation and perform Gas Leak Test after completion of installation.
Do not bend pilot tubing within 3 inches of the gas control or pilot burner after the compression nut has been tightened. Gas leakage at the connection can result.Follow the appliance manufacturer instructions, if available; otherwise, use the instructions provided.

Remove the Old Pilot Burner

A. Make sure gas is shut off.B. Remove old Pilot Burner, including the old compression fitting.C. Match the old model number to the Cross Reference.D. Use the information in the Cross Reference to install the Pilot Burner.

Check the Hood

Q348U Universal Pilot has a 1” batwing hood. If the existing pilot has a different wingspan, check with the OEM before using Q348U.

Mount Pilot Burner

Use the included screws to mount the Pilot Burner. Use the Auxiliary Mounting Bracket if needed. Position the Pilot Burner so the pilot flame is aimed at the main burner exactly the same way as the original pilot burner flame.

WARNINGFIRE OR EXPLOSION HAZARD. CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH.Pilot burner flame alignment to the main burner is critical to safe appliance operation. Carefully read all installation instructions. Replace only those pilots listed in the literature.

Install the Correct Orifice and Compression Fitting

See Cross Reference for orifice and size Cut off the old compression fitting and replace it with the new compression fitting provided with the new pilot burner. Never use the old compression fitting because it might not provide a gas-tight seal.

WARNINGFIRE OR EXPLOSION HAZARD. CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH.The orifice must be the same size as the original orifice.

Connect the Ignition Cable and Ground Wire

NOTE: Connect ground wire if present or applicable.

Gas Leak Test and Checkout

Gas Leak TestMake sure the warning card has been removed from the pilot.B Turn on gas supply.C Use a gas sniffer* or paint the pipe connections upstream of the pilot burner with a rich soap and water solution to check for leaks. Bubbles indicate a gas leak.D If a leak is detected, tighten the pipe connections.E Stand clear of the main burner while lighting to prevent injury from hidden leaks, which can cause flashbacks in the appliance vestibule.F Set the thermostat to call for heat to light the main burner.G With the main burner in operation, paint the pipe joints (including the adapters) and gas control inlet and outlet with rich soap and water solution or use a gas sniffer* to check for leaks.H If another leak is detected, tighten the adapter screws, joints, and pipe connections.I Replace the part if the leak cannot be stopped.J Do not proceed until all gas leaks are eliminated.* See AHRI video for proper use and considerations when using an electronic gas sniffer Checkout Cycle the furnace through several cycles to ensure proper smooth light off.

WARNINGFIRE OR EXPLOSION HAZARD. CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH.

Check for gas leaks any time work is done on a gas system.

Adjust Pilot Flame

The pilot flame should envelop 3/8 to 1/2 in. (10 to 13 mm) of the igniter-sensor tip.A. Turn off the system.B. Disconnect the lead to the MV terminal on the gas control.C. Light the pilot by setting the thermostat above room temperature to call for heat.D. Remove the pilot adjustment cover screw from the gas control.E. Turn the inner pilot adjustment screw clockwise to decrease or counterclockwise to increase the pilot flame.F. Replace the pilot adjustment cover screw and tighten firmly after adjustment is complete to ensure proper operation.NOTE: If the Pilot flame is too small and cannot be adjusted to a larger size, a larger orifice may be needed. Check application requirements. If the Pilot flame is too large and cannot be adjusted to a smaller size, a smaller orifice may be needed.Check application requirements.

WARNINGFIRE OR EXPLOSION HAZARD. CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH.Using the incorrect orifice or pilot hood can cause an unstable pilot, too large or too small of a pilot, pilot outage, reduced pilot life, improper light off, or gas buildup.

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