6 Installation
Installer and user reference guide
29
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508020-1A – 2018.01
NOTICE
In Europe, the
greenhouse gas emissions
of the total
refrigerant charge in the system (expressed as tonnes CO
2
equivalent) is used to determine the maintenance intervals.
Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2
Fix the label on the inside of the unit near the charging port
(e.g. on the inside of the service cover).
6.8
Connecting the water piping
6.8.1
About connecting the water piping
Typical workflow
Connecting the water piping typically consists of the following
stages:
1
Connecting the water piping of the indoor unit.
2
Filling the water circuit.
3
Insulating the water piping.
6.8.2
Precautions when connecting the water
piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
6.8.3
To connect the water piping
Water connections must be made in accordance with all applicable
legislations and the outlook drawing delivered with the unit,
respecting the water inlet and outlet.
NOTICE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit.
If dirt gets in the water circuit, problems may occur. Therefore,
always take into account the following when connecting the water
circuit:
▪ Use clean pipes only.
▪ Hold the pipe end downwards when removing burrs.
▪ Cover the pipe end when inserting it through a wall so that no dust
and dirt enter.
▪ When using non-brass metallic piping, make sure to insulate both
materials from each other to prevent galvanic corrosion.
▪ Make sure to provide a proper drain for the pressure relief valve.
▪ Because brass is a soft material, use appropriate tooling for
connecting the water circuit. Inappropriate tooling will cause
damage to the pipes.
▪ For correct operation of the system, a regulating valve must be
installed in the water system. The regulating valve is to be used to
regulate the water flow in the system (field supply).
6.8.4
To fill the water circuit
1
Connect the water supply to the drain and fill valve.
2
Make sure the automatic air purge valve is open (at least 2
turns).
3
Fill with water until the pressure gauge indicates a pressure of
approximately 2.0 bar. Remove air in the circuit as much as
possible using the air purge valves (refer to field setting [E‑04]
in
"7.2.9 Field settings on the user interface" on page 38
NOTICE
▪ Air in the water circuit can cause malfunctioning. During
filling, it may not be possible to remove all the air from
the circuit. Remaining air will be removed through the
automatic air purge valves during the initial operating
hours of the system. Additional filling with water
afterwards may be required.
▪ To purge the system, use the special function as
described in
NOTICE
The water pressure indicated on the manometer will vary
depending on the water temperature (higher pressure at
higher water temperature).
However, at all times water pressure shall remain above
1 bar to avoid air entering the circuit.
NOTICE
Make sure water quality complies with EU directive
98/83 EC.
INFORMATION
The unit may dispose of some excessive water through the
pressure relief valve.
6.8.5
To insulate the water piping
The complete water circuit, inclusive all piping, must be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity as well as prevention of freezing of the
outside water piping during winter time. The thickness of the
insulation materials must be at least 13 mm with λ=0.039 W/mK in
order to prevent freezing of the outside water piping at ambient
temperature of –15°C.
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
6.9
Connecting the electrical wiring
6.9.1
About connecting the electrical wiring
Before connecting the electrical wiring
Make sure:
▪ The refrigerant piping is connected and checked
▪ The water piping is connected
