Viessmann Vitocal 300-G BW, Installation And Service Instructions Manual

Page: 102 / 216

102
!
Please note
If the compressor is at a steep
angle in the heat pump module,
the introduction of lubricant into
the refrigerant circuit will damage
the equipment.
Never tilt the heat pump module
more than 45°.
!
Please note
The earth conductors are con-
nected to the inside of the casing
panels of the heat pump module.
Never rip off the earth conductors
when removing the external pan-
els.
Undo the earth conductors
before removing the casing pan-
els. Reconnect all earth conduc-
tors during the assembly.
1. Undo the screws on the front sec-
tion.
2. Remove the front section.
3. Pull the front section forward and
remove.
4. Check the floor area, valves and all
visible solder joints of the heat pump
for traces of oil.
Note
Traces of oil indicate a leaking refrig-
erant circuit. Ask a refrigeration engi-
neer to check the heat pump.
Checking the refrigerant circuit for leaks
1. Open the heat pump module (see
page 101).
2. Check the floor area, valves and all
visible solder joints for traces of oil.
3. Check the heat pump interior with a
refrigerant leak detector or leak
detection spray for refrigerant leaks.
Filling the primary circuit, venting it and checking its pressure
!
Please note
To prevent equipment damage, it
is
vital to prevent the compressor
from being switched on if the pri-
mary circuit
has not been filled .
For this, switch off the load cur-
rent to the compressor.
1. Only for commissioning:
Flush the primary circuit.
2. Only for commissioning:
Check the pre-charge pressure of the
expansion vessel and adjust, if
required (see page 104).
3. Only for commissioning:
Fill the primary circuit with heat trans-
fer medium and vent the circuit. The
system must be protected against
frost down to -15°C.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
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