Remote Control Installation For: Gwh 635 Es/Gwh 635 Eso/250Sx/250Sxo/2400E/2400Eo; Remote Control Transceiver Pcb Installation - Bosch Remote Control User Manual

6720606990-1005_(Remote control).fm Page 5 Thursday, July 1, 2010 11:46 AM
4 Remote control installation for: GWH 635 ES/GWH
635 ESO/250SX/250SXO/2400E/2400EO
4.1 Remote control trans-
ceiver PCB installation
Warning: For safety
reasons, disconnect
the power supply to
the water heater
before performing
installation.
Pre-installation preparation
B Disconnect power supply to heater.
B Remove plastic decals on front
panel.
B Loosen two Philips head screws
located behind plastic decals.
B Lift front cover upward and remove.
Fig. 2
6 720 606 990
Remote control installation
B Remove the 5 screws on the front
retaining bar (see Fig. 2, pos. 1 and
2) being careful not to damage the
foam sealant material on it.
B Remove control unit auxiliary cover
(Fig. 2, pos. 4).
B Remove the two electrical strip
connectors inside the auxiliary cover
(Fig. see diagram below) and then
loosen the 110V power supply cord
retaining nut located underneath the
heater. Once loosened, the power
cord can be pulled up through the
heater to provide sufficient slack.
Once auxiliary
cover is off, pull
off the two
electrical strip
connectors from
the board. Once
off, the wiring
harness can be
removed from the
case by pulling
their rubber seals
outward.
Electrical strip connectors
B At the ignition electrodes, pull off the
2 yellow igniter wires that come from
5