STIEBEL ELTRON WPE-I 04 HKW 230 Premium, Administrator'S Manual For Operation And Installation

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iNSTallaTiON
Installation
12 | WPE-I H(K)W 230 Premium www.stiebel-eltron.com
9.3 Opening the appliance
Note
When you open the appliance, check the sealing tape.
The sealing tape is required for generating the necessary
negative pressure.
f Replace the sealing tape if required.
f If necessary, remove the casing parts (see chapter "Installa-
tion / Transport / Separating the appliance").
9.4 Installing the heat source system
!
Material losses
The maximum heat source application limit of 40 °C must
not be maintained for more than 30 minutes. Continu-
ous operation with a heat source temperature above the
maximum application limit (see chapter "Specification/
Data table") is not permitted.
Note
Engineer the heat source system for the appliance ac-
cording to the technical guides.
Note
The appliance can also be operated using groundwater
as a heat source. An intermediate circuit is required for
operation using groundwater.
f
Fit the GWS groundwater module or a heat exchang-
er.
f
Fill the intermediate circuit with an ethylene glycol/
water mixture with at least 25 % by vol. ethylene
glycol. Check for leaks.
f In the heat pump manager, set the source medium
to "WATER". The minimum return source tempera-
ture is set automatically to +2 °C.
Permitted brine:
Part number
MEG 10 Heat transfer medium as concentrate on
an ethylene glycol base
231109
MEG 30 Heat transfer medium as concentrate on
an ethylene glycol base
161696
9.4.1 Circulation pump and required flow rate
The flow rate is automatically controlled by the heat pump man-
ager. The circulation pump cannot be set manually.
9.4.2 Connection and filling with brine
f
Thoroughly flush the pipework with brine before connecting
the heat pump to the heat source circuit. Foreign bodies,
such as rust, sand and sealant, can impair the operational
reliability of the heat pump. We recommend installing our
WPSF brine charging unit in the heat source inlet (see chap-
ter "Appliance description / Accessories").
To facilitate easy connection to the brine circuit, the appliance
is supplied with push-fit connectors (see chapter "Installation /
Fitting push-fit connectors").
f
Connect one flexible pressure hose each to act as an anti-vi-
bration mount to the "heat source flow" and "heat source
return" connections. The pressure hoses are part of the
standard delivery.
The brine volume of the heat pump under operating conditions can
be found in the data table (see chapter "Specification").
The overall volume is equal to the required amount of brine made
by mixing undiluted glycol and water. The chloride content of the
water must not exceed 100 ppm.
Mixing ratio
The brine concentration varies depending on whether a geother-
mal collector or a geothermal probe is used as the heat source.
For the mixing ratio see the table below.
Ethylene glycol Water
Geothermal probe 25 % 75 %
Geothermal collector 33 % 67 %
Charging the brine circuit
Note
f
Insulate the brine lines with diffusion-proof thermal
insulation.
The ground source heat pump is equipped with a brine pressure
switch in the brine circuit. If there is a leak in the brine circuit,
the brine pressure switch shuts down the appliance and prevents
brine getting into the ground.
If the pressure in the brine circuit falls below 0.7 bar, the brine
pressure switch turns the heat pump off. In order for the heat
pump to be enabled again, the pressure must be raised to at least
1.5 bar while the heat pump is on standby.
To prevent the brine pressure switch turning the heat pump off
when there is no leak, charge the heat source side of the heat
pump during installation with a minimum pressure of > 1.5 bar.
f Charge the system according to the following curve to pre-
vent an unintentional response from the brine pressure
switch.
0
0,5
1
1,5
2
2,5
3
0 200 400 600 800
1
2
D
00000
58
69
2
X System volume [l]
Y Charge pressure [bar]
1 Required fill pressure depending on system volume at 33 %
brine
2 Required fill pressure depending on system volume at 25 %
brine