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Installation, user and maintenance manual – GAHP-A
Figure 8.1 – Major safety devices unit
LEGEND
A Limit thermostat
B Pressure unit
C Generator
D By-pass valve
E Combustion chamber
F Pump
Inner parts
Table 8.2 – Safety valve
TYPE
CALIBRATION
MODEL
SAMI INSTRUMENTS
507.6 PSIG (35 bar)
code
SEALED CIRCUIT SAFETY VALVE Mechanical stop valve
a 110°C
VDS 2000
±3%
or similar*
* The manufacturer guarantees the safety of operation and only when equipped with original spare parts
Sealed circuit safety valve characteristics
PRODUCT CODE
J-VLV023A
INSPECTION PROCEDURE
Before starting the inspection of the safety valve, the unit must be switched-off. Remove
the electric and gas power supplies and operate on each unit of the appliance as
follows:
Electrically isolate the unit. (External master switch in OFF position) and isolate the
supply:
1. Remove the front and upper panel of the unit;
2. Identify the valve, which lies behind the levelling chamber (see Figure 8.2 Overpressure valve on page 70);
3. Remove the refrigerant flexible ducting pipe by loosening in a clockwise
direction;
4. Once the operation has been completed, re-mount the flexible pipe taking it to the
original position (see Figure 8.2 Over-pressure valve on page 70);
5. Re-mount the front and upper panel of the unit.
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