GAHP-AR – Installation, start-up, use and maintenance manual
72
Edition:
2014-08
13. With the burner lit, check the pressure indicated by the manometer against the
pressure indicated in Table 21, page 72.
14. If necessary, regulate the gas pressure:
keep the burner lit and the manometer connected; remove the protective cap of
screw A (detail A, Figure 32);
turn screw A of the gas valve (detail A, Figure 32), clockwise to increase the
pressure or anticlockwise to decrease it, until the pressure indicated in Table 21 is
reached;
at the end of the operation, replace the protective cap of screw A.
15. Switch off the appliance via the on/off commands (or via the DDC, if connected and
in controller mode).
16. Remove the manometer and retighten the fixing screw of the gas pressure outlet
(detail C, Figure 32).
17. Check for possible leaks on the gas network with a solution of soap and water.
Figure 32 -
Gas valve (SIT 830) of the appliance.
GAS TYPE
NATURAL GAS
LP GAS
MANIFOLD PRESSURE
2.8 WC INCHES
5.1 WC INCHES
NOZZLE DIAMETER
0.21” 0.14”
Table 21 -
Gas pressure to the burner, air diaphragm and nozzle diameters
Regulation of plant operating parameters
Regulation of operating parameters of the plant occurs via the electronic board (see
Paragraph 3.8 on page 44) or via the DDC (if connected).
If the appliance is connected to a Direct Digital Controller (DDC), for operations
regarding the regulation of plant operating parameters according to the user’s
requirements, refer to the DDC’s manual (final user manual – book 2) supplied with
it.
INLET
PRESSURE
TAP
PRESSURE
REGULATOR
ADJUSTMENT
REMOVE CAP SCREW FOR
PRESSURE ADJUSTMENT
OUTLET
PRESSURE
TAP
INLET
OUTLET
OFF
ON
GAS CONTROL
KNOB
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