Panasonic WH-MDF09C3E5 Installation Manual page 37

Type of pipes/Fittings
Internal diameter up to 22 mm
Internal diameter from 22 mm to 35 mm
Internal diameter from 35 mm to 100 mm
Recommended thermal insulation of heat distribution and hot water pipes
Warning!
In monobloc systems, there is a
risk of freezing if the heating cir-
cuit is filled with water and the
outside temperature falls below
+4 °C . That can cause signifi-
cant damage to the device .
Warning!
To prevent damage to the heat
pump from lime scale, please
consult BS 7593 "Code of
practice for treatment of water
in domestic hot water central
heating systems" .
Warning!
Water quality shall be in accord-
ance with European Council Di-
rective 98/83EC . In particular:
Chloride max . 200 mg/l
Sulphate max . 200 mg/l
Combined
Chloride/Sulphate max . 300 mg/l
Aquarea air/water heat pump – Installation manual for monobloc and split systems C, D and E series 05 / 2014
Hydraulic installation for monobloc systems
Insulate the pipes in accordance with the latest UK building
➤
regulations, although the below is recommended:
Minimum thickness of insulation layer
40 mm
60 mm
2 × internal diameter
The customer is responsible for ensuring that the device does not
freeze . Please use one of the following options to do so:
• The heating circuit is operated with a food safe antifreeze mixture
(40 % propylene glycol mixture) for temperatures down to -20 °C)
• An additional heater unit in the monobloc unit prevents the heating
circuit freezing .
• The heating circuit is drained by a system to be provided by the
customer (manual or automatic) .
Fill the system as follows:
➤
Open all thermostatic radiator valves of the heating system, and all
➤
other shutoff valves where applicable .
Connect a filling hose (evacuated if possible) to the system .
➤
Keep adding water or antifreeze mix until the manometer reaches
➤
the nominal pressure .
Vent the system (see the Commissioning section (9)) . Then check the
➤
pressure again and add liquid if necessary
1
Manometer
1
6
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