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Installation and connection
7.2.1
Heat pump with underfloor heating
7.2.2
Heat pump with radiators (no cooling mode)
04.12.2015
nections. Thus, if service is required, only the minimum amount of heat
transfer medium has to be drained from the system and time-consuming
venting measures can be avoided.
In factory default setting, the pipe ends are closed with plastic caps. When
connection is performed, these caps must be removed and the connecting
unions screwed on with suitable gasket.
To tighten the screw connections, resistance at the cap must be provided
with suitable tool!
To prevent corrosion and scale formation in the heating system (circulating
pumps, radiators, etc.), the heating water must be treated according to VDI
2035 (e.g. with corrosion inhibitor).
To find the volume flow at heating side for the corresponding heat
pump, please refer to the performance table (5K spread).
The heating connections (2") feature an external pipe thread for flat-
sealing connections with union nut and insert.
A circulation pump is installed at heating side. The circulation pumps are
offered with an internally coated housing (plastic).
The use of steel pipes and other steel components is not permitted in
the heating circuit of underfloor heating systems. Use stainless steel,
copper, brass or plastic - such as PE - for instance.
In case of single room control, a buffer tank (corrosion-free) and a differ-
ential pressure overflow valve must be installed in the heating system
(see diagrams).
When the living space controlled by single room control is less than 1/3,
a buffer tank is not required if the remaining 2/3 floor circuits remain
open.
On systems with steel radiators an effective corrosion inhibitor must be
added and a dirt trap (0.8 mm mesh) connected before entry into the
unit. The system must then be marked accordingly and the mainte-
nance instructions of the supplier must be followed strictly.
Heating systems with radiators require the installation of a buffer tank
(connected in parallel) (see diagrams). The size of the tank must be cal-
culated. The heat pump control regulates the temperature of the buffer
tank. After the tank, the components (circulation pump, mixing valve ...)
must be controlled with an optional WATERKOTTE mixing control
(P11108).
If the formation of deposits is to be expected (e.g. strong contamination)
based on water quality, cleaning must be performed in regular intervals.
Cleaning can be performed by flushing.
Procedure:
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Copyright 2014 by: WATERKOTTE GmbH. Subject to changes.
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