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Maintenance
RT-SVX19A-E458
To keep the unit operating safely
and efficiently, the manufacturer
recommends that a qualified service
technician check the entire system
at least once each year, or more
frequently if conditions warrant it.
End user routine
maintenance
Some of the periodic maintenance
functions for the unit can be
undertaken by the end user. This
includes replacing (disposable) or
cleaning (permanent) air filters,
cleaning unit cabinet, cleaning the
condenser coil, and carrying out a
general unit inspection on a regular
basis.
WARNING! Disconnect the power
supply before removing access
panels to service the unit. Failure to
disconnect power before attempting
any servicing can result in severe
injury or death.
Air filters
It is very important for the central
duct system air filters to be kept
clean.
These should be inspected at least
once a month when the system is in
constant operation (in new
buildings, the filters should be
checked every week for the first four
weeks). If disposable-type filters are
used, they should only be replaced
with ones of the same type and size.
Table 41 - Refrigerant charge
Note: Refrigerant charges are given for information only. Check unit nameplate for exact values.
Unit model and size Number of circuits
Refrigerant charge
(kg) (R22/R407C)
YSD/YSH 060 1 3.5
YSD/YSH 072 1 3.7
YSD/YSH 090 1 4.5
YSD/YSH 102 2 3.7/2.1
YSD/YSH 120 2 3.5/3.0