Replacement Procedure - Johnson Controls G77 Series Installation Sheets Manual

Replacement
Procedure
Perform the following procedure to replace the existing intermittent pilot
ignition control.
1. Shut off power to the appliance.
2. Turn off the gas at the manual shutoff valve adjacent to the appliance.
3. Label each wire with the correct terminal designation prior to
4. Disconnect the power supply (transformer) and the thermostat lead
5. Disconnect the sensing probe lead from Terminal 4 on the ignition
6. Disconnect the high voltage cable from the spark transformer.
7. Disconnect the Pilot Valve 1 and Main Valve 3 leads from the ignition
8. Disconnect any wires connected to the ground terminals.
9. Remove the screws holding the ignition control assembly in place.
10. Remove the ignition control and discard.
11. Using the same holes as the old ignition, mount the new control with
12. Refer to the Installation and Wiring section for electrical connections
13. Perform the Checkout and Startup Procedure before leaving the
14 GG77x Intermittent Pilot Ignition Controls Technical Bulletin
All manuals and user guides at all-guides.com
!
WARNING: Shock Hazard. Avoid electrical shock and
equipment damage. Disconnect electrical power and
turn off the gas before wiring the control into the
circuit.
!
CAUTION: Equipment Damage Hazard. Label all wires prior
to disconnection when servicing controls. Wiring
errors can cause improper and dangerous operation.
Verify proper operation after servicing.
disconnection.
wire at the ignition control.
control (separate spark/sense models only).
control.
metal screws or bolts through the mounting holes in the enclosure.
and wiring information. The replacement G77x control has a Spike
transformer connection. Refer to the Modifying Existing Ignition Cable
section for connection to a Spike transformer.
installation.