Vesta VC 100 (LP) COMBI, Руководство по установке

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Connecting the Gas Supply 23
5. Loosen the screws indicated in the figure below and connect a
manometer to the pressure port Reset the manometer to zero .
before use.
Digital pressure
manometer
6. Re open the manual gas valve and check for leaks - .
7. Open multiple fixtures that have high flow rates such as ,
bathtub and shower faucets to ramp the boiler up to its ,
maximum firing rate.
8. When the boiler reaches its maximum firing rate check the ,
inlet gas pressure reading on the manometer The gas pressure .
must fall within the ranges specified on page 8.
To measure the inlet gas pressure:
1. Shut off the manual gas valve on the gas supply line.
2. Open a hot water faucet The boiler should turn on and the gas .
in the gas supply line will be purged.
3. Leave the faucet on until the boiler shuts down due to a lack of
gas supply and then turn off the hot water faucet , .
4. Remove the front cover by loosening the 2 Phillips head screws
securing it to the case.
CAUTION
Ensure that no cables are in the way before folding down the
PCB assembly If the assembly is stuck do not force it Doing
. , .
so may damage the cables and result in serious malfunctions.
Check again to ensure that no cables or any other parts are in
the way before you proceed.
Opened Closed
WARNING
●
The boiler cannot function without sufficient inlet gas pressure.
Measuring the inlet gas pressure should be performed by a
licensed professional only.
●
The inlet gas pressure must be maintained between 3.5 in and
10.5 in W.C for natural gas and between 8.0 in and 13.5 in W.C
propane.
The appliance and its individual shutoff valve must be disconncted
from the gas supply piping system during any pressure testing of
●
The appliance must be isolated from the gas supply piping system
by closing its individual manual shutoff valve during any pressure
testing of the gas supply piping system at test pressure equal to
●
that system at test pressure in excess of 1/2psi(3.5 kPa).
or less than ½ psi(3.5kPa).
4.2 Measuring the Inlet Gas Pressure