Vaillant ecoTEC exclusive 832, Инструкция по установке и обслуживанию

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ecoTEC exclusive installation and maintenance instructions / 0020017768_04
20 mbar when the appliance is operating at the maxi-
mum heat input. The inlet working pressure to the appli-
ance is measured at the appliance multi-functional gas
valve on the valves inlet pressure test point, see fig. 6.5.
Due to internal appliance pressure losses the reading at
the inlet of the appliance gas valve may be lower than
the design pressure of 20 mbar.
The acceptable pressure measured at the appliance gas
valve inlet is:
Natural Gas
(G20) Meter outlet pressure Minimum pressure
at gas valve inlet
ecoTEC ex-
clusive
832 Maximum
Design (nominal)
Minimum 23 mbar
21 mbar
19 mbar 20 mbar
18 mbar
16 mbar
ecoTEC ex-
clusive
838 Maximum
Design (nominal)
Minimum 23 mbar
21 mbar
19 mbar 19.5 mbar
17.5 mbar
15.0 mbar
Table 6.3 Acceptable pressure measured at the appliance gas
valve inlet
h
Note!
In all instances the gas rate to the appliance
shall be measured.
a
Caution!
Should the pressure recorded at the gas meter
not be between 19 mbar and 23 mbar then the
Emergency Service Provider should be contact-
ed.
a
Caution!
Should the pressure at the gas meter be cor-
rect but lower pressure at the gas valve than
indicated in the above table, it may indicate
blockage in the internal pipework or that the
pipework is undersized. Rectification work must
be undertaken before the appliance is commis-
sioned.
6.2.2 Checking the connection pressure
(gas inlet working pressure)
Proceed as follows to check the connection pressure:
• Remove the front cover from the device.
• Close the gas isolation cock on the unit.
2
1
Fig. 6.5 Checking the gas supply pressure
• Release the sealing screw marked "in" ( 1 ) on the
gas fitting.
• Connect a digital pressure manometer or u-gauge
manometer ( 2 ).
• Open the gas isolation cock on the unit.
• Start the appliance up via
P.1 (see Chapter 9.2).
• Measure the connection pressure in comparison
with atmospheric pressure.
a
Natural gas:
If the connection pressure is outside the range
19 to 23 mbar, no adjustment should be under-
taken, and the unit must not be started up!
a
Liquid gas:
If the connection pressure is outside the range
25 to 45 mbar, no adjustment should be under-
taken, and the unit must not be started up!
If the connection pressure is within the permissible
range, proceed as follows:
• Take the appliance out of operation.
• Close the gas isolation cock on the unit.
• Remove the pressure gauge and screw the sealing
screw ( 1 ) back in again.
• Open the gas isolation cock on the unit.
• Make sure that the sealing screw is not leaking.
• Put the front cover back on and turn on the device.
Start-up 6