IDEAL icos system HE15 Installation And Servicing page 48

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69 USER CONTROL REPLACEMENT
Note. Only the display unit is replaced.
1. Refer to Frame 55.
2. Loosen the screw on the underside of
the user control.
3. Pull the display unit forward to remove.
4. Push the new display unit into position.
5. Reassemble in reverse order.
6. Check operation of the boiler. Refer to
Frame 55.
70 PRESSURE GAUGE REPLACEMENT
1. Refer to Frame 55.
2. Drain the boiler. Refer to Frame 73.
3. Unscrew the pressure gauge and discard.
4. Fit the new pressure gauge, using a suitable jointing
compound.
5. Refill the boiler. Refer to Frame 35.
6. Check operation of the boiler. Refer to Frame 55.
48
SERVICING
2
Pressure gauge
(shown in the open position)
Flow isolation valve
icos system -
Installation and Servicing
Display
unit