Installation, user and maintenance manual
– GAHP-A
71
The type of gas for which the appliance is set up can be identified from the sticker posi-
tioned on the gas pipe inside the unit (see detail M, Figure 7.2 Gas changeover
→
76).
The nozzles required to change the gas type to G30 and G31 are supplied together with
the appliance.
During the first start-up procedure it is in any case necessary to:
check the dynamic gas mains pressure
•
check and adjust the appliance’s combustion parameters
•
You will need: the appliance connected to the gas and electricity supply: switched off
and with the gas cock closed; front panel removed.
Check the dynamic gas mains pressure
Connect the manometer to the gas intake (see detail D, Figure 7.1 Gas
1.
valve
→
71).
Open the gas valve and check that the grid static pressure complies to the value
2.
reported in Table 5.2 Network gas pressure
→
33 (with a tolerance of ±15%).
If the static mains pressure is greater than 50 mbar DO NOT switch on the appliance!
Give the consent signal for operation.
3.
After some seconds of operation, check that the grid dynamic pressure complies
4.
with the value reported in Table 5.2 Network gas pressure
→
33 (with a tolerance
of ±15%).
figure 7�1 – Gas valve
Gas valve Honeywell VK 4115V
LeGend
A
Plug
B
Key Torx TX40
C
screw adjustment CO2
D
gas pressure intake
