Panasonic Aquarea WH-MDF06E3E5 series - Page 19

6 – 19Aquarea air/water heat pump – Installation manual for compact systems 03 / 2013
6
Hydraulic installation
Hydraulic installation
³ Open the compact unit as described in Section 5.
³ Install the pipes, valves, dirt trap and other components in accord-
ance with the design documents.
³ Install a dirt trap (to be provided by the customer) upstream of
the water inlet (water return) of the compact unit (grid width at least
500 to 600 μm) to protect the heat pump. We recommend installing
a shutoff valve upstream and downstream of the dirt trap
, to make
subsequent maintenance work on the dirt trap easier.
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³ If a heat pump with a cooling function is used, install a 2-way direc-
tional valve to deactivate the heating circuits in cooling mode, where
applicable.
³ Install the 3-way directional valve (to be provided by the customer)
to switch from heating mode to water heating mode and vice versa.
As standard, the valve should be open towards the heating circuit
(contacts 4 and 6 are closed). The valve must also be CE compliant
and may not exceed the peak load of 12 VA.
³ Use Rp 1¼" nuts to connect the water inlet (labelled WATER IN) and
water outlet (labelled WATER OUT). Use a torque wrench to tighten
it, and apply the correct torque: 117.6 Nm .
³ Close the supply (water outlet) and return (water inlet) of the compact
unit at the heat exchanger of the hot-water tank. Ensure that
you do
not confuse the connections (supply = top, return = bottom).
³ Install a device for draining the system (to be provided by the customer).
Position of the dirt trap
1
Water supply WATER OUT
2
Dirt trap
3
Water return WATER IN
4
Union nut
5
Connection
6
Shutoff valve
1
2
3
4 65
Warning!
In cooling mode, humid air can
condense on the surface of the
heat transfer systems if the
temperature drops below the
dew point. This can damage
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slippery. As a result, you must
install suitable positioned dew
point sensors to ensure that
temperatures lower than the
dew point do not occur or drain
any condensate which forms
reliably. In addition, the pipe-
lines affected must be insulated
impermeably.
Warning!
Hydraulic decoupling between
the heat pump circuit and heat
emitter circuit is always required
when using Aquarea heat
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not be used.