Viessmann Vitocal 350-A AWHI 351.A14, Инструкция по установке и обслуживанию

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70
!
Please note
Refrigerant can escape when working on the
refrigerant circuit.
Work on the refrigerant circuit must
only be car-
ried out by a certified contractor (in accordance
with EC 842/2006 and 303/2008).
Check the floor area, valves and all visible solder joints
for traces of oil.
Note
Traces of oil indicate a leak in the refrigerant circuit.
Have your heat pump checked over by a refrigeration
engineer.
Filling and venting on the secondary side
Unsuitable fill and top-up water increases the level of
deposits and corrosion. This can lead to system dam-
age.
Observe VDI 2035 regarding quality and amount of
heating water, including fill and top-up water.
■ Flush the heating system thoroughly before filling.
■ Only fill with water of potable quality.
■ If the fill and top-up water has a water hardness
greater than 16.8 °dH (3.0 mol/m
3 ), it must be soft-
ened, e.g. using the small softening system for heat-
ing water: See the Vitoset pricelist.
!
Please note
Escaping liquids can lead to electrical defects.
Protect electrical components of the heat pump
from escaping liquids.
Note
Before
filling the system, observe VDI 2035 part 1.
Fig. 66
A
Drain valve
B
Manual air vent valve
1. Open any non-return valves installed on site.
2. Check the pre-charge pressure of the expansion
vessel (see page 71).
3. Fill the secondary circuit via the on-site BDF valve
(flush) and vent the circuit.
Commissioning, inspection, maintenance
Checking the refrigerant circuit for leaks
(cont.)
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