Daikin ERLQ004CAV3, Installer'S Reference Manual

Page: 34 / 108

7
Installation
Installer reference guide
34
ERLQ004~008CA + 08S18CA3VF
Daikin Altherma low temperature split
4P366226­1 – 2014.01
7.5.3
To fill the water circuit
1
Connect the water supply hose to the fill valve.
2
Open the fill valve.
3
Make sure that the automatic air purge valve is open (at least 2
turns).
INFORMATION
For location of the air purge valve, see Components:
Indoor unit in chapter
"15 Technical data" on page 72 .
4
Fill the circuit with water until the manometer indicates a
pressure of ±2.0 bar.
5
Purge as much air as possible from the water circuit.
6
Close the fill valve.
7
Disconnect the water supply hose from the fill valve.
NOTICE
The water pressure indicated on the manometer will vary
depending on the water temperature (higher pressure at
higher water temperature).
However, at all times water pressure shall remain above
1 bar to avoid air entering the circuit.
7.5.4
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 that free water flow through the discharge pipe.
7.5.5
To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation and reduction of the heating capacity.
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the sealing materials should be at
least 20 mm to prevent condensation on the surface of the sealing.
7.5.6
To connect the recirculation piping
1
Loosen and remove the screws at the bottom of the unit.
2
Slide the front panel of the unit downwards and remove it.
3
Loosen and remove the 4 screws that fix the top panel.
4
Remove the top panel from the unit.
2x
4x
1
3
4
2
5
Remove the expansion vessel.
6
Remove the upper insulation cover of the unit.
a
b
a
Knock­out hole
b
Connection for recirculation piping
7
Remove the knock­out hole at the backside of the unit.
8
Connect the recirculation piping to the recirculation connection
and route the piping through the knock­out hole at the backside
of the unit.
9
Remove the indicated part in the figure below.
10
Re­attach the insulation, expansion vessel and casing.