4 Installation
Installation manual
8
EWAQ+008BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P478610-1 – 2017.02
1
Drill (a, 4×) and remove the knockout hole (b).
b
a b
4× Ø6 mm
2
Remove the burrs, and paint the edges and areas around the
edges using repair paint to prevent rusting.
4.2.4
To prevent the outdoor unit from falling
over
1
Prepare 2 cables as indicated in the following illustration (field
supply).
2
Place the 2 cables over the outdoor unit.
3
Insert a rubber sheet between the cables and the outdoor unit
to prevent the cable from scratching the paint (field supply).
4
Attach the cable’s ends. Tighten those ends.
4.3
Connecting the water piping
4.3.1
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.
NOTICE
Install a manometer in the system.
NOTICE
Install air purge valves at all local high points.
4.3.2
To protect the water circuit against
freezing
If negative outdoor temperatures are expected, add glycol to the
water circuit. The required concentration depends on the lowest
expected outdoor temperature, and on whether you want to protect
the system from bursting or from freezing. To prevent the system
from freezing, more glycol is required. Add glycol according to the
table below.
INFORMATION
▪ Protection against bursting: the glycol will prevent the
piping from bursting, but NOT the liquid inside the
piping from freezing.
▪ Protection against freezing: the glycol will prevent the
liquid inside the piping from freezing.
Lowest expected
outdoor
temperature
Prevent from
bursting
Prevent from
freezing
–5°C
10%
15%
–10°C
15%
25%
–15°C
20%
35%
–20°C
25%
—
–25°C
30%
—
▪ The addition of glycol applies to BOTH cooling‑only
models (008BAVP) AND reversible models
(008BAVP), and is independent of cooling
or heating operation. ALWAYS add glycol if negative
outdoor temperatures are expected.
▪ The required concentration might differ depending on
the type of glycol. ALWAYS compare the requirements
from the table above with the specifications provided by
the glycol manufacturer. If necessary, meet the
requirements set by the glycol manufacturer.
▪ The added concentration of glycol should NEVER
exceed 35%.
▪ If the liquid in the system is frozen, the pump will NOT
be able to start. Mind that if you only prevent the
system from bursting, the liquid inside might still freeze.
▪ In case of a power supply failure or pump failure, and
NO glycol was added to the system, drain the system.
▪ When water is at standstill inside the system, the
system is very likely to freeze and get damaged.
The following types of glycol are allowed:
▪
Ethylene glycol
;
▪
Propylene glycol
, including the necessary inhibitors, classified as
Category III according to EN1717.
WARNING
Ethylene glycol is toxic.
