32
14.
THE GAS THERMOSTAT V- 35
The gas thermostat V-35 consists of three main parts:
Be 1 lows
sys
tern
Mechanism
Valve housing, see fig. 52 and fig.
53.
BY-PASS SCREW
“COLD”
AOJUSMENT
SCREW
TYPE V35
Gas inlet
)‘alvc
housmg
, Bellows system
+
Gas outlet
l_evL
Mcchbnism housing
Fig. 52
Fig. 53
Cleaning valve or valve seat in the V-35 thermostat
Dirt on the thermostat gas valve or seat prevents the thermostat valve from
car
pletely closing,
consequently it lets through some gas when in closed position.
This condition may prevent reducing the flame to the required minimum. It will cause
too low cabinet temperature.
This can be controlled by turning the thermostat dial
to
“0”)
If the flame does not go down to the
low
flame (by-pass flame) it will be
necessary to clean the thermostat valve and valve seat. Note: The thermostat will
not close to
by-gass
on setting
“O”,
at least
S°C
(40 F) .
unless the thermostat bulb is cooled down to
Proceed as follows:
a) Remove the plug,
spring and valve and clean the valve and the valve seat.
b)
Also check that the size of by-pass screw is in accordance with table below.
Note:The adjusting screw on the thermostat is preset at the factory and should
-
never be readjusted,
LOST THERMOSTAT CHARGE
If the thermostat control assembly loses its charge, it will become inactive. To
test for a lost charge,
while the flame is reduced to minimum and the temperature
control is set
at a numbered position on its dial:
Remove
thermostat capillary tube
from its clamp in the evaporator and warm
capillar:r
end
with
the hand, If the flame
fails to increase in sire,
the thermostat has
10s
t its charge and the themostat
must be replaced.
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