Replacement Procedure - Johnson Controls G76 Series Installation Sheets Manual

Replacement
Procedure
!
WARNING: Shock Hazard. Avoid electrical shock and
equipment damage. Disconnect electrical power and
turn off 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.
Perform the following procedure to replace the existing direct spark
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
disconnection.
4. Disconnect the power supply (transformer) and the thermostat lead
wire at the ignition control.
5. Disconnect the sensing probe lead from Terminal 4 on the ignition
control.
6. Disconnect the high voltage cable from the spark transformer.
7. Disconnect the Main Valve 3 lead from the ignition control.
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 G76x control
with metal screws or bolts through the mounting holes in the
enclosure.
12. Refer to the Installation and Wiring section for electrical connections
and wiring information. The replacement G76x control has a Spike
transformer connection. Refer to the Modifying Existing Ignition Cable
section for connection to a Spike transformer.
13. Perform the Checkout and Startup Procedure before leaving the
installation.
G—G76x Direct Spark Ignition Controls Technical Bulletin 11