To Connect The Water Piping To The Backup Heater; About The Valve Kit - Daikin Altherma EDLQ011-016CW1 Installer's Reference Manual

NOTICE
In case an optional domestic hot water tank is installed:
▪ A drain device and pressure relief device must 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 relief
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 the backup heater is installed in a reversible system
(heating+cooling), and the conditions of
necessity" on page 96
inside the backup heater. To provide a bypass for the
condensate, install valve kit EKMBHBP1. Do NOT install
any other valve kit than EKMBHBP1.
INFORMATION
Inside the backup heater, an automatic air purge valve is
installed. For instructions on how to perform an air purge,
refer to "9.4.2 Air purge function" on
EBLQ+EDLQ011~016CAV3+W1 + EK(2)CB07CAV3 +
EKMBUHCA3V3+9W1
Daikin Altherma low temperature monobloc
4P522034-1 – 2018.01
"14.4 Valve kit
are valid, condensation may occur
page 78.
7.7.5

About the valve kit

INFORMATION
Only applicable to reversible systems (heating+cooling) in
which a backup heater is installed.
When installing the backup heater in a reversible system (heating
+cooling), and the conditions presented in
necessity" on page 96 are met, condensation may occur inside the
backup heater. It is required that a bypass for this condensate be
provided.
NOTICE
In case of valve kit malfunction or if problems arise due to
incorrect installation, the condensate that occurs inside the
backup heater may not get properly bypassed. To prevent
the condensate from doing damage, make sure all
components installed under the backup heater are
resistant to at least dripping water (IPX1).
The installation site requirements for the valve kit depend on the
required leaving water temperature setpoint (underfloor heating:
18°C – fan coil units: 5°C) and the material of the piping (copper or
Alpex). Provide sufficient space under the backup heater, according
to the figure and table below.
A
A Minimum required distance between backup heater and
valve kit.
Leaving water
temperature
Copper
setpoint
18°C A=25 cm
5°C A=50 cm
(a) Aluminium-reinforced polyethylene
Valve kit EKMBHBP1 contains a check valve and a 3‑way valve,
which need to be integrated into the system as follows:
a b c d f e
a Outdoor unit
b Refrigerant part of the outdoor unit
c Hydro part of the outdoor unit
d 3‑way valve (of valve kit EKMBHBP1)
e Check valve (of valve kit EKMBHBP1)
f Backup heater kit
g Control box
h Domestic hot water tank
i Space heating circuit
j 3‑way valve (of the domestic hot water tank)
To connect the check valve
1 Connect the check valve to the water outlet of the backup
heater.
7 Installation
"14.4 Valve kit
Material of the piping
(a)
Alpex
A=10 cm
A=20 cm
g
j i
FHL1
FHL2
h
Installer reference guide
FHL3
37