Bosch GWH 10-2 G Series, Руководство по установке и эксплуатации

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15
Commissioning
6 720 608 992 (2021/02)
5.7 Draining the appliance
There are two ways to drain the appliance if there is a risk of
freezing.
After turning off the inlet water valve and gas supply, open a hot
water tap to relieve pressure then proceed as follows:
Water valve draining (see fig 14)
▶ Remove the fixing lock [1] from the filter screw cap [2]
situated in the water valve.
▶ Remove the filter screw cap from the water valve.
▶ Carefully remove the water filter [3].
▶ Empty all the water contained in the heater.
Fig. 15 Draining
[1] Lock
[2] Filter screw cap
[3] Water filter
Cold water inlet pipe drain (see fig 15)
▶ Remove the pressure relief screw (no. 1) situated in the
water inlet pipe.
▶ Drain all the water contained in the heater.
Fig. 16 Draining
[1] pressure relief screw
6 Commissioning
6.1 Inlet pressure adjustment
Burner pressures have been adjusted in the factory, however
adjustment may be required upon installation.
Attach a manometer to the inlet pressure test point [1] located
on the gas inlet pipe [2].
Fig. 17 Gas inlet pressure test point
Inlet gas pressure should be adjusted at the appliance regulator
to 1.13 kPa for Natural Gas and 2.75 kPa for LP gas.
These measurements must be set while the unit is operating,
with the water valve fully clockwise (minimum flow) and the gas
valve fully anti-clockwise (maximum gas).
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DANGER:
The following procedures must only be
performed by a qualified technician.