Structural Concepts Oasis B427WN, Installation And Operating Manual

Page: 19 / 29

19
PREVENTIVE MAINTENANCE (TO BE PERFORMED BY TRAINED SERVICE PROVIDER) - Page 1 of 2
WARNING! TURN OFF CASE BEFORE PERFORMING PREVENTIVE MAINTENANCE!
PREVENTIVE
MAINTENANCE
FREQ. INSTRUCTIONS
Case Exterior Quarterly Under Case Cleaning: When refrigeration package is removed from underside
of case, vacuum under case to remove all dust, debris and dirt that collects.
Quarterly Condensate Pan:

Warning! Condensate pan Is HOT! Disconnect power from case and allow
to cool before cleaning!
 See CONDENSATE PAN ACCESS section for in-depth instructions on
accessing the condensate pan.

If condensate pan is removable from case, you may disconnect from
condensate pan, scrub with soap/water solution and firm brush. Rinse, but
do not submerse in water (due to electrical components).
 Use a scrub-brush and a de-scaling solution such as CLR® (to prevent
corrosion, lime and rust buildup). Follow instructions as to proper dilution,
safety precautions and scrubbing method.
 After thoroughly cleaning pan with scrub-brush and solution, rinse
thoroughly with clean water and then wipe dry.

Slide refrigeration package back under case.

Replace rear grille to case (using either hooks or screws).
Weekly Condenser Coil:

Remove Front Grille. See CASE STARTUP & REFRIGERATION
PACKAGE ACCESS section for instructions on removing Front Grille.

Vacuum or brush Condenser Coil.

Reattach Front Grille to Case.
Quarterly Refrigeration Assembly: Warning! Disconnect power from the case before
accessing the Refrigeration Package!
 Remove Front Grille (by removing 2 screws). See CASE START-UP &
REFRIGERATION PACKAGE ACCESS section for specific instructions
on doing so.

Slide out Refrigeration Assembly.
 Use a clean cloth and hot water with soap solution to wipe down dust and
residue that may form on parts.
Case Interior Quarterly Tub, Coil, Drain, Fan Blades, Motors, Brackets:
Disconnect power from the case before cleaning!

See EVAPORATOR COILS, TXV VALVE & DRAIN ACCESS section for
illustration.
 Remove Decking.

Pivot Fan Shroud forward (by lifting tabs out of coil cover).

Disconnect plug from fan.

Use vacuum to clean Evaporator Coils.

Clean Tub, Coil and Drain with warm water, clean cloth, brush and mild
soap solution.

Remove any debris that may clog drain.

Wipe down Fan Blades, Motors and Brackets with moist cloth.
Quarterly Honeycomb: Check honeycomb air diffuser to determine if dirty. If dirty,
remove from case. See next page of this manual for cleaning specifics.