Connecting The Water Piping; To Connect The Water Piping; To Fill The Water Circuit; To Fill The Domestic Hot Water Tank - Daikin ERLQ004CA Installer's Reference Manual
Altherma - low temperature split
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Also See for ERLQ004CA:
- Installer's reference manual (104 pages) ,
- Installer's reference manual (104 pages)
Table of Contents
7.5
Connecting the water piping
7.5.1 To connect the water piping
NOTICE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit.
To facilitate service and maintenance, 2 shut-off valves are provided.
Mount the valves on the water inlet and on the water outlet. Mind their
the position. Orientation of the integrated drain valves is important for
servicing.
1
Install the shut-off valves on the water pipes.
b
a
a Water inlet
b Water outlet
NOTICE
To avoid damage to the surroundings in case of water
leakage, it is recommended to close the cold water inlet
stop valves during periods of absence.
2
Screw the indoor unit nuts on the shut-off valves.
3
Connect the field piping on the shut-off valves
4
In case of connection with the optional domestic hot water tank,
see the installation manual of the domestic hot water tank.
NOTICE
A drain device and pressure relief device should be
installed on the cold water inlet connection of the
domestic hot water cylinder.
To avoid back siphonage, it is recommended to install
a non-return valve on the water inlet of the domestic
hot water tank in accordance with the applicable
legislation.
It is recommended to install a pressure reducing valve
on the cold water inlet in accordance with the
applicable legislation.
An expansion vessel should be installed on the cold
water inlet in accordance with the applicable
legislation.
It is recommended to install the pressure relief valve
on higher position as top of the domestic hot water
tank.
Heating of the domestic hot water tank causes water
to expand and without pressure relief valve the water
pressure inside the tank can rise above the tank
design pressure. Also the field installation (piping,
tapping points, etc.) connected to the tank is subjected
to this high pressure. To prevent this, a pressure
relieve valve needs to be installed.
The overpressure prevention depends on the correct
operation of the field installed pressure relief valve. If
this is NOT working correctly, overpressure will deform
the tank and water leakage may occur. To confirm
good operation, regular maintenance is required.
EHBH04+08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
7.5.2 To fill the water circuit
1
Connect the water supply hose to the drain and fill valve.
2
Open the drain and 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.
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.
NOTICE
Air in the water circuit can cause malfunctioning of the
backup heater. During filling, it may not be possible to
remove all the air from the circuit. Remaining air will be
removed through the automatic air purge valves during
the initial operating hours of the system. Additional
filling with water afterwards may be required.
To purge the system, use the special function as
described in To perform an air purge. This function
should be used to purge the heat exchanger coil of the
domestic hot water tank.
6
Close the drain and fill valve.
7
Disconnect the water supply hose from the drain and 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.
7.5.3 To fill the domestic hot water tank
For installation instructions, see the installation manual of the
domestic hot water tank.
7.5.4 To insulate the water piping
The piping in the complete water circuit must be insulated to prevent
condensation during cooling operation and reduction of the heating
and cooling 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.
7.6
Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
INFORMATION
More information about the legend and the location of the
wiring diagram of the unit can be found in Wiring diagram.
7 Installation
Installer reference guide
34
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