Trane WCVS 270 Installation Operation & Maintenance page 13

Weekly maintenance
Check the liquid line sight-glass.
Presence of bubbles indicates
possible shortage of refrigerant or
dirty liquid line filter driers.
A noticable temperature drop
across the filter driers (more than 5
deg. F) indicates dirt or obstruction
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in the filter driers. Replace filter drier
if necessary.
Monthly maintenance
Inspect unit air filter. Clean or
replace if filters are dirty and
blocking airflow.
Inspect coils for excess moisture or
icing. Icing may be due to restricted
air flow or shortage of refrigerant
flow across the coil.
Check condensate flow though
drainpipe. Remove any obstructions
or algae if found.
Check tension and condition of fan
belts.
Note: Belt tensions should be
checked and adjusted at least twice
during the first few days of new belt
operation.
Six month interval
Inspect fan motor for proper
lubrication.
With power disconnected, manually
rotate the fan wheel to check for
obstructions in the housing.
Check alignment of fan assembly
sheaves. Tighten setscrews for their
proper torques.
Annual maintenance
Check and tighten all setscrews,
Operation / Start-Up
bolts, locking collars and sheaves.
Inspect, clean and tighten all
electrical connections.
Inspect the TXV sensing bulbs for
cleanliness, good contact with
suction line and insulated from
ambient.
Check superheat setting of TXV. It
should be 11 F to 14 F.(6-8
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Drain the condenser water system
and throughly inspect for fouling.
Clean the condensers.
Required Unit
Envelope
The following summarizes the envelope
around each unit size which is required
for proper service access.
assumption in establishing these
service envelopes are listed below:
1.
Service envelopes shown are
assumed to be the absolute
minimum space required to service
a unit. It is suggested that unit-to-
wall clearance on all sides be
900mm, except where more room is
already specified; this will allow
easier access to all components for
general unit servicing.
2.
Room for general maintenance of
fans and refrigerant components
was considered. Also the minimum
room required to remove fans, fan
motors and compressor servicing is
considered. Cleaning of the
condenser waterside tubes must be
accomplished by the use of a flexible
type brush cleaning machine.
Adequate service clearance has NOT
been left for the following: (It is unlikely
these service procedures will be
needed).
* Condenser cleaning using the brush
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with a straight rod.
* Relining condensers.
* Relining evaporator coils.
* Replacing evaporator coils.
* Shaft removal.
3.
The clearance specified on the unit
control panel side is the clearance
C) which is required for general unit
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servicing and not that which is
required by local electrical codes.
The required control panel clearance
must be determined by the applicable
Service
codes in that region.
4. Refer to the unit dimension al data
for recommended clearance.
The
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TRANE