Repairs And Replacement - Johnson Controls UL Listed GS-20 Series Manual

G—UL Listed GS-20/25 and GS-40/45 Series Single-block Multi-function Gas Control Valves Technical Bulletin 15

Repairs and Replacement

Field repairs must not be made, except to replace the filter or strainer. For
a replacement part, contact the nearest Johnson Controls representative or
the original equipment manufacturer.
!
CAUTION: Label all wires prior to disconnection when servicing
valves. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
Perform the following steps to replace the filter or strainer.
1. Clean or replace the filter or strainer with each recommended
inspection or at a minimum each annual functional inspection.
2. Close the main manual shutoff valve and disconnect field wiring. As
each wire is disconnected, label it with the correct terminal
designation.
3. Remove the screws on the flanges and remove the valve and filter
plate.
4. Clean or replace the filter or strainer. Reinstall the filter plate and
valve.
5. Refasten the flange screws to the valve and reconnect field wiring.
!
WARNING: Fire or explosion hazard. Verify that the valve
functions properly and there are no gas leaks. Follow
this checkout procedure before leaving the
installation. Failure to verify proper valve installation,
equipment operation, and gas tight connections may
result in fire, explosion, property damage, and injuries
or death.
6. Open the pressure connection between the manual shutoff valve and
the GS valve.
7. Connect air tubing with a maximum pressure of 1-1/2 times the
valve's maximum operating pressure (as indicated on the valve) to the
opened pressure connection.