Connecting The Water Piping; About Connecting The Water Piping; Precautions When Connecting The Water Piping; To Connect The Water Piping - Daikin EBLQ05+07CAV3 Installer's Reference Manual

7.7

Connecting the water piping

7.7.1

About connecting the water piping

Before connecting the water piping
Make sure the outdoor unit is mounted. If applicable, also make sure
the control box and the backup heater are mounted.
Typical workflow
Connecting the water piping typically consists of the following
stages:
1 Connecting the water piping of the outdoor unit.
2 Connecting the water piping of the backup heater and/or the
domestic hot water tank (if applicable).
3 Filling the water circuit.
4 Protecting the water circuit against freezing (addition of glycol).
5 Filling the domestic hot water tank (if applicable).
6 Insulating the water piping.
7.7.2 Precautions when connecting the water
piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
7.7.3

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. Make sure that the tightening torque does NOT
exceed 30 N•m.
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 position: the integrated drain valves will only drain the side of
the circuit on which they are located. To be able to only drain the
unit, make sure the drain valves are positioned between the shut‑off
valves and the unit.
a b
a Water inlet
b Water outlet
1 Screw the outdoor unit nuts on the shut-off valves.
2 Connect the field piping on the shut-off valves.
3 In case of connection with the optional domestic hot water tank,
see the installation manual of the domestic hot water tank.
EBLQ05+07CAV3 + EDLQ05+07CAV3 + EKCB07CAV3 +
EK2CB07CAV3 + EKMBUHCA3V3 + EKMBUHCA9W1
Daikin Altherma low temperature monobloc
4P405544-1 – 2015.03
NOTICE
▪ Install a manometer in the system.
▪ Install air purge valves at all local high points.
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
a higher position than the 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.
7.7.4 To connect the water piping to the backup
heater
NOTICE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit. Make sure that the tightening torque does NOT
exceed 30 N•m.
1 Connect the water piping (field supply) to the water in- and
outlet of the backup heater.
b
a
a Water inlet
b Water outlet
NOTICE
When installing the backup heater in a reversible system
(EBLQ05+07CAV3), condensation may occur. Therefore
provide a bypass by installing valve kit EKMBHBP1 to the
water inlet of the backup heater. This valve kit is not yet
available for sale, but will become available later in 2015.
Do NOT install any other valve kit than EKMBHBP1.
INFORMATION
Inside the backup heater, an automatic air purge valve is
installed. For the location of this valve, refer to the
"Technical data" chapter of the installer reference guide.
For instructions on how to perform an air purge, refer to the
installation manual of the outdoor unit.
7 Installation
Installer reference guide
37