7 Installation
Installer reference guide
34
EWAQ+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
b
a
a
Water inlet
b
Water outlet
NOTICE
When the backup heater is installed in a reversible system
(cooling), and the conditions of
are valid, condensation may occur
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 page 67
7.7.5
About the valve kit
INFORMATION
Only applicable to reversible systems (cooling) in
which a backup heater is installed.
When installing the backup heater in a reversible system (heating
+cooling), and the conditions presented in
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
setpoint
Material of the piping
Copper
Alpex
(a)
18°C
A = 0.25 m
A = 0.1 m
5°C
A = 0.50 m
A = 0.2 m
(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:
FHL1
FHL2
FHL3
a b
c
f e
h
g
d
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
Space heating circuit
To connect the check valve
1
Connect the check valve to the water outlet of the backup
heater.
To connect the 3-way valve
1
Unpack the 3‑way valve body and 3‑way valve motor and verify
that the following accessories are provided with the motor.
a
b
c
d
a
Sleeve
b
Valve motor cover
c
Screw
d
Scale
2
Connect the 3‑way valve body to the water inlet of the backup
heater, in accordance with one of the following four
configurations. Position the shaft in such a way that the motor
can be mounted and replaced.
1
2
3
1
3
2
1
2
3
1
3
2
E3
E1
E2
E4
1
From outdoor unit
