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WARNING
Electrical Shock Hazard.
Can cause serious injury, death or property
damage.
Disconnect power supply before beginning installation
to prevent electrical shock and equipment damage.
More than one disconnect may be required.
CAUTION
Equipment Damage Hazard.
Improper grounding can damage equipment.
Be sure that the mounting chassis of the Q624A is
properly grounded at all times, even during bench
testing. Otherwise, device may burn out.
Mounting
The Q624A mounts in the same space required by a standard
ignition transformer, using the same mounting holes. It may be
mounted in any position.
WIRING
WARNING
Electrical Shock Hazard.
Can cause serious injury, death or property
damage.
Disconnect power supply before beginning wiring to
prevent electrical shock and equipment damage. More
than one disconnect may be required.
1. All wiring must comply with applicable local electrical
codes, ordinances and regulations.
2. Voltage and frequency of the power supply connected to
theQ624A must be 120 Vac, 60 Hz.
3. Be sure the mounting chassis of the Q624A is properly
grounded.
IMPORTANT
When connecting wires to the screw terminals of the
Q624A, wrap the wire 2/3 to 3/4 of the distance
around the screw without overlapping (see Fig. 2).
Use an appropriately sized screwdriver to securely
tighten the screw (at least 12 inch-pounds of torque).
Do not use a push-type ratchet screwdriver.
Fig. 2. Correct and incorrect wire wraps around terminal
M20859
screws.
Q624A SOLID STATE SPARK GENERATOR
1. Loosen the cover screw (FIg. 1) and remove the cover.
2. Insert two leads (NEC CLass 1) through the 1/2 in. (13
mm) conduit knockout (Fig. 1) and connect them to the
screw terminals on the terminal board, and to the
terminal strip or wiring subbase of the flame safeguard
control (see Table 1 and Fig. 3 or 4).
3. Replace the cover and tighten the cover screw.
4. Connect the high voltage electrode (Fig. 1) to the ignition
electrode on the pilot burner, using the appropriate
Ignition Cable Assembly or Ignition Cable (see
Accessories in the Specifications section).
IMPORTANT
The ignition cable should not exceed 15 feet (4.6
meters) in length.
To ground the Q624 to the burner assembly:
1. Use a No. 16 or No. 18 wire.
2. Attach one end of the wire to the Q624 ignition
transformer end (GND).
3. Wrap the wire around the igniter (high tension) lead as
shown in Fig. 3. Four or five wraps are sufficient.
4. Connect the other end of the wire to the burner assembly
(GND).
Q624
IGNITION
TRANSFORMER
7800
SERIES
Fig. 3. Grounding the Q624 to the burner assembly.
WARNING
Fire or Explosion Hazard.
Can cause serious injury, death or property
damage.
If flame detector and ignition transformer are not
properly connected, detector may sense ignition spark,
which could open a main gas valve and cause a
hazardous condition.
Wiring of terminals T1 and T2 on the Q624A to the proper
terminals of the flame safeguard control must be in accordance
with Table 1.
3
BURNER ASSEMBLY
IGNITION
LEAD
FLAME ROD
LEAD
M19423
60-2049—08
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