Filter Drier - Fisher & Paykel RB90S64MKIW Service Manual

4 Evaporator Outlet Sensor (Colour Yellow)
Located on the outlet side of the evaporator, this measures the temperature of the refrigerant leaving the
evaporator.
5 Filter Drier Sensor
This is attached to the filter drier and is used to measure the temperature of the refrigerant entering the filter.
These measurements are used to control the backpressure and the speed of the compressor at certain
ambients in which the VC compressor may be running.
7.10

Filter Drier

The filter drier or molecular sieve, as the name suggests, is both a filter and a drier. Whenever a system is
opened, it is essential that the filter drier is replaced. ALWAYS ensure that replacement filter driers are kept
well sealed and airtight prior to being fitted to a system.
PLEASE NOTE: When filter driers are replaced on systems being serviced, it is important that the
filter drier is either cut from the system, or that the desiccant is removed before heat is applied to the
old filter drier. Failure to do so will drive any moisture held in the desiccant back into the system.
ALWAYS mount vertically or as near to vertical as possible and use the correct desiccant to suit the
refrigerant being used.
XH7 or XH9 desiccant suits R134a refrigerant.
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