Daikin Altherma ERGA04E V3 Series, Руководство по установке для специалистов

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8 | Piping installation
Installer reference guide
109
ERGA04~08E + 23E
Daikin Altherma 3 R F
4P629090-1C – 2022.08
NOTICE
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All pipework and fittings must be flushed free of flux and debris prior to installing
the domestic hot water tank kit. Failure to do this may cause irreparable damage
to the tank kit controls. Flush the system by opening the hot water tap.
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The tundish pipework must be a 22 mm metal pipe with a minimal vertical length
of 300 mm below the tundish before any elbows or bends in the pipework. All
pipework must have a continuous fall of 1 in 200 thereafter. Maximum permitted
(equivalent) length of 22 mm pipework is 9 m. Each bend or elbow is equivalent
to 0.8 m of pipework.
8.6.5 To connect the recirculation piping
Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see "7.2.4 To open the indoor
unit" [ 4 71].
2 Cut out the rubber grommet on top of the unit, and remove the stop. The
recirculation connector is placed below the hole.
3 Route the recirculation piping through the grommet and connect it to the
recirculation connector.
4 Reattach the top panel.
8.6.6 To fill the water circuit
To fill the water circuit, use a field supply filling kit. Make sure you comply with the
applicable legislation.
INFORMATION
Make sure both air purge valves (one on the magnetic filter and one on the backup
heater) are open.
8.6.7 To fill the domestic hot water tank
1 Open every hot water tap in turn to purge air from the system pipe work.
2 Open the cold water supply valve.
3 Close all water taps after all air is purged.
4 Check for water leaks.
5 Manually operate the field-installed pressure relief valve to ensure a free
water flow through the discharge pipe.