4 x Set-up and installation
FA ROTEX HPSU compact 4 - 06/2015
33
4.6 Pressure test and filling the coolant circuit
Ɣ Perform pressure test with nitrogen.
– Use nitrogen 4.0 or higher.
– Maximum 40 bar.
Ɣ Afte
r leak search is complete, completely drain.
Ɣ Vacuu
m lines.
– Pressure to be achieved: 1 mbar absolute.
– Time: minimum 1 h
Ɣ Che
ck whether additional coolant is needed for primer filling,
fill where necessary.
Ɣ Open stop valve on exterior unit completely until the stop.
Tighten loosely.
Ɣ Reassemble valv
e caps.
Ɣ Check whether the storage tank temperature sensors t
DHW1
and t
DHW2
are inserted to a depth of 80 cm.
4.7 Filling the system with water
Do not fill the ROTEX HPSU compact until all installation activ-
ities have been completed, in the order shown as follows.
4.7.1 Checking the water quality and adjusting the
pressure gauge
Ɣ Observe the information on the water connection and water
quality in accordance with section 4.3.
The correct minimum pressure marking must be set on the
pressure
gauge installed by the customer before filling the
system for the first time:
Ɣ Ro
tate the pressure gauge glass in such a way that the
minimum pressure mark corresponds to the system
height +2 m (1 m water column = 0.1 bar).
4.7.2 Filling the hot water heat exchanger
Ɣ Open the shutoff valve for the cold water supply pipe.
Ɣ Open the hot water tap connections so that the draw-off
volume can be set as high as possible.
Ɣ Once water has bee
n discharged from the tap connections,
do not interrupt the cold water flow; this will ensure that the
heat exchanger will be fully vented and that any impurities or
residue will be discharged.
4.7.3 Filling the storage tank
See chapter 7.4.
4.7.4 Filling the heating system
See chapter 7.5.
A Exterior heat pump unit (RRLQ)
B ROTEX HPSU compact
C Gas line
D Liquid line
E Oil trap arc
H Height to 1st oil trap (max. 10 m)
H
O
Height difference between heat pump exterior unit and heat pump
interior unit.
Fig. 4-37 Oil trap arc coolant line
RISK OF ENVIRONMENTAL DAMAGE!
Important information regarding the coolant used.
The complete heat pump system contains refrigerant
with fluorinated greenhouse gases which damage the
environment if released.
Coolant type: R410A
GWP* value: 2087,5
* GWP = Global Warning Potential
Ɣ Fill in the total coolant filling quantity on the
supplied lable on the heat pump exterior unit (for
information consult the installation instructions for
the heat pump exterior unit).
Ɣ Never all
ow coolant to be released into the atmos-
phere - always suction it off and recycle using a
suitable recycling device.
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