AirSep MN138-1 H - Manual (Page 30)

24
MN138-1 Rev H
02/14
To replace the exhaust muffler, follow the steps below:
1. Follow steps 1-7 in the Compressor Assembly Removal procedure outlined under
section 4.3.1.
2. Locate exhaust muffler assembly in back of compressor enclosure, cut tie-wrap
securing it in place.
3. Remove tie-wrap from tubing connection, disconnect tubing.
4. Unscrew the top half (exhaust muffler) from exhaust muffler body.
5. Install new exhaust muffler to the muffler body, being careful not to over tighten to
prevent damaging threads of exhaust muffler.
6. Remove back panel.
7. To install tie-wrap for new muffler assembly, the compressor enclosure is required
to be pulled out toward the front of unit. To allow greater access, remove tubing
connections at the equalization valve, and disconnect the fittings from both sieve
beds. (Temporarily seal sieve bed openings with tape to prevent the sieve material
from being exposed to the moisture in room air.)
8. From the front of the unit, gently slide entire compressor enclosure towards you.
(Do not pull out enclosure too far as damage may occur to certain components
within concentrator.)
9. Starting from inside the compressor compartment, install new tie-wrap though the
bottom opening located in the recessed area where the exhaust muffler assembly
will be installed. (Hint: it may be easier if the end of the tie-wrap is formed into a
‘hook’ shape before this step.)
10. Route tie-wrap up the back of the compressor compartment and into the top
opening of the compressor enclosure. When finished, both ends of tie-wrap
should be located inside the compressor enclosure.
11. Reattach tubing to exhaust muffler assembly securing with tie-wrap.
12. Place muffler assembly into recessed area, securing with installed tie-wrap.
13. Return compressor compartment to the original position, being careful not to
pinch any tubing or wires between compressor enclosure and center section of
unit.
14. Reinstall compressor assembly following the Compressor Assembly Installation
procedure outlined under section 4.3.1.
15. Reconnect and tighten fittings to top of sieve beds. Bottom sieve bed tubing and
the unit’s power cord should be located inside these tubing connections.
16. Reconnect and secure tubing to equalization valve using tie-wraps.
17. Leak test tubing connections on sieve beds and equalization valve.
4.17 Caster Replacement
Caster Removal
To replace a caster, it is necessary to remove the base of unit from the center section. To
do this, follow the steps below:
1. Set the unit’s I /0 switch to the “0” position and unplug the power cord.
2. Remove both front and back panels.
3. Remove compressor cover from the compressor enclosure to access front screws
securing center section to base.
4. Using a Phillips-head screwdriver, remove the screws in the front and back of
unit securing the base of unit to the center section.