54
!
Please note
Commissioning when the primary circuit is
empty causes appliance damage.
Charge and vent the primary circuit before con-
necting the power supply.
1.
Check the pre-charge pressure of the expansion
vessel.
2.
Charge the primary circuit with Viessmann heat
transfer medium and vent.
Note
Ensure frost protection down to
–
19 °C.
Viessmann heat transfer medium is a ready-mixed
ethylene glycol-based medium. It contains inhibi-
tors for corrosion protection. The heat transfer
medium can be used at temperatures down to
–
19 °C.
3.
Check the connections for possible leaks. Replace
faulty or displaced gaskets.
Filling and venting 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 sheet 1.
1.
Open any on-site non-return valves if installed.
2.
Check the pre-charge pressure of the expansion
vessel.
3.
Fill (flush) and vent the secondary circuit.
Note
Type BWC is supplied with integral non-return
valves. The secondary circuit only permits one
direction of flow.
!
Please note
Leaking hydraulic connections lead to appli-
ance damage.
■
Check the internal and on-site hydraulic
connections for leaks.
■
In the event of leaks, switch OFF the appli-
ance immediately. Drain off liquid via the
drain valve. Check the seating of seal
rings.
Always
replace displaced seal
rings.
4.
Check system pressure. Top up with water if
required.
■
Minimum system pressure:
0.8 bar (80 kPa)
■
Permiss. operating pressure:
2.5 bar (250 kPa)
Commissioning, inspection, maintenance
Filling and venting the primary side
5516461
Summary of Contents for BW 301.B06
Page 69: ...69 Fig 49 Maintenance Opening the casing door 5516461 Maintenance...
Page 76: ...76 Maintenance Condensation and moisture in the heat pump cont 5516461 Maintenance...
Page 79: ...79 Parts lists type BWC 301 B Parts not shown type BWC 301 B cont 5516461 Components...
Page 88: ...88 Parts lists type BWC 301 B Hydraulics type BWC 301 B cont 5516461 Components...
Page 91: ...91 Parts lists type BW 301 B Parts not shown type BW 301 B cont 5516461 Components...
Page 100: ...100 Parts lists type BW 301 B Hydraulics type BW 301 B cont 5516461 Components...
Page 103: ...103 Parts lists type BWS 301 B Parts not shown type BWS 301 B cont 5516461 Components...
