Installation
14
Installation instructions geoTHERM 0020051574_04
4
4 Installation
4.1
Requirements for the installation site
>
Choose a dry room that is frost-proof and where the
temperature does not fall below 7 °C and does not
exceed a maximum of 25 °C.
>
Note that the installation room must have a minimum
volume. In accordance with DIN EN 378 T1, the minimum
size of the installation room (V
min
) for heat pumps is cal-
culated as follows:
V
min
= G/c
G = coolant filling quantity in kg
c = practical limit value in kg/m
3
(for R 407 C, c = 0.31 kg/m
3
)
This therefore results in the following minimum installa-
tion space:
Heat pump type
Coolant filling
quantity [kg]
Minimum installa-
tion space [m
3
]
VWS 220/2
VWW 220/2
4.1
4.3
13.2
13.9
VWS 300/2
VWW 300/2
5.99
19.3
VWS 380/2
VWW 380/2
6.7
21.6
VWS 460/2
VWW 460/2
8.6
27.7
4.1 Minimum size of the installation space for the heat pump
>
Ensure that the required minimum clearance can be
maintained.
>
When selecting the installation site, you must take into
consideration that when the heat pump is in operation, it
will carry vibrations over to the floor and the nearby
walls.
>
Ensure that the floor is level and offers sufficient bearing
capacity to be able to bear the weight of the heat pump,
including a hot water tank and, if required, a filled buffer
tank that is ready for use.
>
Ensure that cables can be easily run (for brine, well
water, hot water and heating).
b
Caution!
If an unsuitable heating type is used dur-
ing cooling, there is a risk of damage
posed by a build-up of condensation.
During cooling, condensation forms on the
radiators and their supply lines and this
causes mould to form and structural dam-
age.
>
Do not install the geoTHERM heat pumps
with external passive cooling in heating
installations that have radiators.
i
Take the cooling into consideration when using
surface collectors.
When using a Vaillant heat pump with external
passive cooling, a ground sensor must be used.
4.2
Requirements for the well water quality
(VWW only)
b
Caution!
Risk of damage from unsuitable well
water.
Deposits caused by using unsuitable well
water may damage the suction well, the
pipes and the evaporator. Using water that
contains salt is not permitted.
>
Before installing the unit, check that the
quality level of the water that is drawn in
is sufficient.
If the heat pump must be installed directly in the well water
circuit, irrespective of the legal requirements, a water anal-
ysis must be carried out in accordance with the following
table for evaluating the quality of the well water
(
¬
Tab.
4.2
) and you must decide whether the well water
can be used as a heat source. The table is to be used as a
guide and does not claim to be complete. If the well water is
not of a sufficient quality, you must use a brine-water heat
pump (VWS) that has an intermediate heat exchanger that
must be installed on-site (
¬ geoTHERM planning informa-
tion
).
As limit values, the values for “copper” prevail because the
heat pump contains a copper-soldered stainless steel plate-
type heat exchanger. If the property “
¯
” (unsuitable)
appears in the “Copper” column or if the property “
à
”
appears three times, direct operation is not permitted. In
this case, an intermediate circuit (with brine-water heat
pump and intermediate heat exchanger) must be installed.
If a screwed stainless steel heat exchanger (material 1.4401)
is used as an intermediate circuit, the limit values for
“Stainless Steel” in the table apply. If the property “
¯
”