7 Installation
Installer reference guide
33
EWAQ+0 EK(2)CB
EKMB9W1
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492901-1 – 2017.06
To facilitate service and maintenance, 2 shut-off valves are provided.
Mount the valves on the water inlet and 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.
NOTICE
Install a manometer in the system.
NOTICE
Install air purge valves at all local high points.
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
(cooling), and the conditions of
"14.4 Valve kit
necessity" on page 83
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 66
.
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
"14.4 Valve kit
necessity" on page 83
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.
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