Roberts Gorden UHD[X][S][R] 125 service manual Pressure Switch, Ignition Control, Limit Switches

SECTION 14: REPLACEMENT PARTS

14.6 Pressure Switch

Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model. The pressure switches are color coded for each pressure setting.

Carry out a start-up after working on or changing a pressure switch. See Page 23, Section 10.

MODEL	UHD[X][S][R] 75	UHD[X][S][R] 100	UHD[X][S][R] 125
Pressure Switch Kit P/N	90439810	90439810	90439803
Color Code	black	black	gray
Set Point in wc	.35	.35	.41
Pressure Switch Snap Ring P/N	90439850	90439850	90439850

14.7 Ignition Control

The control mounts to the heat exchanger plate. Pull out ignition cable and wiring from board, noting their positions. Release the four mounting standoffs. Refit in reverse. Ensure correct location of ignition cable and all other wiring.

14.8 Limit Switches

14.8.1 Removal and Replacement

1.Remove the electrical connections to the switch.

2.Unscrew the two screws securing the switch.

3.Fit a new switch with two screws.

4.Reconnect the electrical connections and test operation.

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