Service And Maintenance - Daikin UAT180AMY1 Manuel D'installation

SPECIAL PRECAUTIONS WHEN DEALING WITH R407C UNIT
•
R407C is a zeotropic refrigerant mixture which has zero
ozone depletion potential and thus conformed to Montreal
Protocol regulation. It requires Polyester oil (POE) oil
for its compressor's lubricant. Its refrigerant capacity and
performance are about the same as the refrigerant R22.
•
POE or PVE oil is used as lubricant for R407C
compressor, which is different from the mineral oil used
for R22 compressor. During installation or servicing, extra
precaution must be taken not to expose the R407C system
too long to moist air. Residual POE or PVE oil in the piping
and components can absorb moisture from the air.
•
Refrigerant R407C is more easily affected by dust of
moisture compared with R22, make sure to temporarily
cover the ends of the tubing prior to installation.
SERVICE OF THE FILTER
• Remove any dust adhering to the fi lter by using a vacuum cleaner or wash in lukewarm water (below 40°C) with a neutral
cleaning detergent.
• Rinse the fi lter well and dry before placing it back onto the unit.
• Do not use gasoline, volatile substances or chemicals to clean the fi lter.
• Clean the fi lter at least once every 2 weeks. Or more frequently if neccesary.
Filter Position
The fi lters are mounted in front of the indoor heat exchanger.
* (Air fi lter : special order or fi eld supply)
UAT(Y)(P)180,280,320,450,560
Service panel
Filter cover
removed when servicing
note: both side for unit 450, 560

SERVICE AND MAINTENANCE

Filter
•
No additional charge of compressor oil is permitted.
•
No other refrigerant other than R407C.
•
Tools specifi cally for R407C only (must not be used for
R22 or other refrigerant)
i) Manifold gauge and charging hose
ii) Gas leak detector
iii) Refrigerant cylinder / charging cylinder
iv) Vacuum pump c/w adaptor
v) Flare tools
vi) Refrigerant recovery machine
•
Filter-dryer must be installed along the liquid line for
all R407C air conditioners. This is to minimise the
contamination of moisture and dirt in the refrigerant
system. Filter-dryer must be of molecular sieve type. For
a heat-pump system, install a two-way fl ow fi lter-dryer
along the liquide line.
UAT(Y)(P)700,850
11
Filter
Filter cover
removed when servicing