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The values in parentheses are valid for the 20TTI
6.3 Swimming Pool Connections
The water pipe connections on the heat pump have 1" and/or
1 1/2" external threads. A pipe wrench must be used to firmly grip
the transitions when connecting the swimming pool heat pump.
The water pipes are connected via a bypass on the filter circuit of
the swimming pool located downstream of the filter and upstream
of the water preparation system.
When plastic pipes are connected, suitable temperature measur-
ing points should be provided directly on the flow and return flow
connections of the swimming pool heat pump (e.g. immersion
sleeves).
Before the water pipes are connected to the swimming pool heat
pump, the swimming pool water system must be flushed to re-
move any impurities, sealant residue, etc. We strongly recom-
mend installing a filter system in the water circuit. Any accumula-
tion of deposits (leaves, grass or other organic contaminants) in
the liquefier may cause total breakdown of the swimming pool
heat pump. Suitable hydraulic installation, adjustment and di-
mensioning of the filter/circulating pump ensures the minimum
water flow rate through the swimming pool heat pump for trouble-
free operation.
Once the water pipes have been installed, the system must be
filled, de-aerated and pressure-tested.
Minimum water flow rate
The swimming pool heat pump does not have an integrated cir-
culation pump. The required water flow must be provided by an
external filter pump and signalled back to the swimming pool
heat pump via the corresponding input.
ATTENTION!
Never operate the heat pump without water flow!
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Antifreeze
Manual drainage (see "Hydraulic Plumbing Diagram" in the Ap-
pendix) should be provided for swimming pool heat pumps ex-
posed to frost. To ensure frost protection, continuous operation
of the filter pump at air temperatures below 5 °C must be en-
sured on site (e.g. by using a frost protection thermostat).
6.4 Electrical Connection
Depending on device type, the swimming pool heat pump is con-
nected to the power supply via a standard 3-core cable (1-phase
devices) or standard 5-core cable (3-phase devices).
The cable(s) is (are) to be provided by the customer. The con-
ductor cross section is selected in accordance with the power
consumption of the swimming pool heat pump (see Device Infor-
mation Appendix) and the applicable VDE (EN) and VNB regula-
tions.
Both an all-pole disconnecting device with a contact gap of at
least 3 mm (e.g. utility blocking contactor or power contactor), as
well as a 3-pole and/or 1-pole circuit breaker with common trip-
ping for all external conductors (tripping current in compliance
with the Device Information), must be installed in the power sup-
ply for the swimming pool heat pump.
Ensure that the incoming supply has a clockwise rotating field
when connecting multiphase devices.
Phase sequence: L1, L2, L3.
ATTENTION!
Ensure that there is a clockwise rotating field (for multiphase devices):
Operating the compressor in the wrong rotational direction could cause
damage to the compressor. Incorrect phase sequence causes wrong
rotational direction of the ventilator and, thus, a significantly reduced
performance.
The device supplies the control voltage to the remote control.
The connecting cable (control line) from the remote control to the
heat pump (not included in the scope of supply) must be suitable
for a 230 V supply voltage. The cable must be 5-core (at least)
and have a single-core cross section of at least 0.5 mm².
The connection line from the heat pump to an on-site release
contact must be suitable for a network voltage of 230 V.
The heat pump does not have an integrated circulating pump.
The required water flow must be provided by an external filter
pump and signalled back to the heat pump via the respective in-
put. Terminals 2 and 3 of terminal strip X2 should be used for this
purpose. Release is made via a floating on-site contact (K29).
ATTENTION!
The flow monitor must be designed for the required volume flow and
ensure permanent interconnection.
6.4
E-7
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