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7.6.3
To install the backup heater
1 Fix the wall bracket to the wall with M5 screws.
2×
2 Hang the backup heater onto the wall bracket.
3 Mark the position of the hole at the bottom of the backup
heater.
4 Remove the backup heater from the wall bracket.
5 Drill a hole for the bottom screw and insert a plug.
6 Hang the backup heater onto the wall bracket. Make sure it is
fixed properly.
7 Fix the bottom of the backup heater to the wall with an M5
screw.
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 (if applicable).
3
Filling the water circuit.
4
Protecting the water circuit against freezing (addition of glycol).
5
Insulating the water piping.
EWAQ+EWYQ004+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
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 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.
7 Installation
Installer reference guide
33
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