12
Maintenance
Installation and Replacement Procedure For The Oxygen Fuel Cell
and HEPA Vent Filter
Before attempting any maintenance to the oxygen monitor system,
disconnect the mains
supply and switch off oxygen monitor.
(See Power down guide on Page 11)
It is recommended that both the oxygen fuel cell and air line filter are replaced together. This is
available as a kit from Wardray Premise Ltd. (Ref: MR106).
•
Undo the six screws securing the back
Oxygen Fuel Cell—see image on page 13
•
Remove the fuel cell cable from the bottom of the fuel cell by pulling upwards.
•
Gently ease the fuel cell out of the retaining body (blue section). Unscrew the bottom part
of the fuel cell (see Fig 1)
•
Screw the replacement oxygen sensor into the fuel cell connector, being careful not to over
tighten and reinstall into the blue section, attach the fuel cell cable connector.
HEPA Vent Filter—see image on page 13
•
Gently pull the air lines to disconnect from both ends of the air filter. Replace the filter and
reconnect both inlet and outlet air lines, making sure that the inlet side of the filter faces the
inlet nozzle (Side with the writing on—see Fig 2). Ensure that the air lines are securely
connected.
•
Re
-
fit the back case with the six screws.
•
Check the operation and calibration of the oxygen monitor by switching on the pump,
battery and monitor (See Power up guide on Page 10). In normal air the display will read
21% oxygen content.
Important
It is recommended that the filter and fuel cell sensor are replaced every 6 months.
The replacement kit (Ref: MR106) may be obtained directly from Wardray Premise Ltd or in
overseas countries from our local agents.
When switched on the fuel cell cable plug has a voltage on its terminals (to power the fuel cell),
which must not be allowed to touch the chassis if left disconnected. If the unit is shipped without
the fuel cell fitted, the plug will have a cover fitted to prevent contact with the chassis if the unit is
inadvertently switched on. Please ensure that the contacts of this connector are not allowed to
touch any part of the chassis during the fitting of a fuel cell.
