Honeywell Q624A Product Data

Q624A Solid State Spark Generator

FEATURES

• Ignites gas pilots with spark gaps up to 1/4 inch (6
millimeters) in length.

• 15,000 volts peak voltage for reliable lightoff.

• Prevents detection of the ignition spark when properly
applied in a flame detection system with the
C7027,C7035, or C7044 Minipeeper® or C7061 Dynamic
Self-Check Ultraviolet Flame Detector.

• Ignition spark and ultraviolet detector are
synchronized by the alternating current supply
voltage; spark occurs on one half of the ac cycle and
detector operates on the opposite half cycle.

• Recommended for interrupted ignition applications
only.

• Mounts in the same space used by conventional
ignition transformer.

• Q624 mounting holes are the same as standard
transformers; no adapter plate needed.

• Impervious to humidity up to 95 percent relative

APPLICATION

The Q624A is a solid state spark generator (transformer) for
use on commercial or industrial gas burners.

humidity.

• Weighs 3 pounds (1.4 kilograms) versus 8-1/2 pounds
(3.9 kilograms) for standard transformers.

PRODUCT DATA

SPECIFICATIONS

IMPORTANT

The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
this unit may not match the listed specifications
exactly. Also, this product is tested and calibrated
under closely controlled conditions, and some minor
differences in performance can be expected if those
conditions are changed.

Models:

Q624A1014 with threaded terminal nut high voltage electrode.

Electrical Ratings:

Voltage and Frequency: 120 Vac, 50/60 Hz.
Output Voltage: 10,000 volts.

Primary VA Rating: 66 VA at 120 Vac.

Spark Characteristics:

Firing Rage: 60 sparks per second.
Voltage, peak-to-peak: 22,000 volts nonsinusoidal.
Firing cycle peak voltage: 15,000 volts ±500 volts, open

circuit.

Energy Discharge: 200 millijoules per spark.
Discharge Time: 0.3 milliseconds per spark.
Power Dissipation: approximately 12 watts per second.

Maximum High Voltage Lead Length: 15 ft. (4.6 m)

Maximum Spark Gap: 1/4 in. (6 mm).

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Q624A SOLID STATE SPARK GENERATOR

TERMINAL

BOARD

MOUNTING

PLATE

HIGH VOLTAGE
ELECTRODE

COVER SCREW

KNOCKOUT FOR
1/2 INCH CONDUIT

1-1/4

(32)

13/16
(20.5)

5-1/4 (133.5)

19/64

(7)

4-1/4
(108)

1-1/4

(32)

3 (76)

M20858

5-15/16 (151)

6-3/4 (171.5)

Ambient Temperature Range: -40°F to +125°F (-40°C to

+52°C).

Maximum Ambient Humidity: 95 percent RH.

Type of Service: All types of gas ignition; not recommended

for use when igniting oil.

Mounting: Surface.

Dimensions: See Fig. 1.

Weight: 3 lb. (1.4 kg).

Approvals:

Underwriters Laboratories Inc. Component Recognized: File

No. MH7453, Guide No. JHYR2; tested and accepted for
use in ambient temperatures ranging from -40°F to + 125°F
(-40°C to +52°C).

Canadian Standards Association Certified: File No. LR95329.

Accessories:

C7005 Gas Pilot, with ignition electrode.
Q179 Gas Pilot, with ignition electrode.
134666 Insulator; may be used to cover terminal, to prevent

contamination, and to give added terminal protection.
32004766-001 24 in. (610 mm) Ignition Cable Assembly.
32004766-002 120 in. (3.05 m) Ignition Cable Assembly.
32004766-003 Ignition Cable (per foot, specify required

length).
32004766-004 60 in. (1.52 m) Ignition Cable Assembly.
Cable should be rated for 25kV at 482°F (250°C).

Fig. 1. Q624A Solid State Spark Generator dimensions in in. (mm).

INSTALLATION

2. Check the ratings given in the instructions and on the

product to make sure the product is suitable for your
application.

When Installing This Product…

1. Read these instructions carefully. Failure to follow them

could damage the product or cause a hazardous
condition.

3. Installer must be a trained, experienced, flame

safeguard control technician.

4. After installation is complete, check out product

operation as provided in these instructions.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:

1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 Douglas Drive North

Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

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