Rolls-Royce Silver Cloud II - Page 50

1· ...
Air Conditioning
System Manual
----- -- Ro/ls-Royce & Bentley--------------
Fig:. II Thermo~tat ( on trol Sn itl'h
THE Tl1ER:\-I0STAT CO:'IITROL SWITCH
A seven-positiot1 switch mounted 01 1 the left-hand
side
of the evapora t or casing controls the cut-111
tempc1-~lt ure of the solenoid by-pass val vc.
A capillary tuhe 1·rom the lo(, ot' the thermostat
enters the evapornlor matrix, rnaki 11g the thermostat
scn.,itive to the tcmpernlun: ul'thc euolcd <11r. Adjust-
ment
of the swi tch position vanes the poi11L al which
the solenoid
va Ive w i 11 open .rnd cyclc the co;11 pressor.
This prevents too low a temperature i11 the evaporator
matrix. w"hich could cause icing of the fi11s and rc:duced
airnow.
I
2 3
4
A 11 in lernul adj u,;trncnt screv,,· is prnvided t·or i nitw 1
~etti ng o 1· the swi lch tem pern tu re range. This rn ust
be ,ct to the required range !givrn below) whc:n a
rep lacc:mcn l switch is filled; no Curt her adjustment
should be nccl:ssan-. \VARN I~(;. The s\vitch knob
should
11evcr be placed in the 'OFF" position \vhen
lhc
~y s tern is operating as this could muse danrnge lo
!he solenoid valve and the compressor·.
The approximate minim um temperatures corres-
ponding to the ,;even operating pos1 tions an: as
follows:-
s
(,
7
42 -40 F
I
40 -3~ F
_,g -36 l·
36 -34 F
34 -32 F
32 -30 F
JO -28 F
Seuit111 C3
)