Table of Contents
Advertisement
10.6. Charging water
1
Connect the water supply to a drain and fill valve (see "5.2. Main
components of the outdoor unit and the indoor unit" on page 6).
2
Make sure the automatic air purge valve is open (at least 2
turns).
3
Fill with water until the manometer indicates a pressure of
approximately 2.0 bar. Remove air in the circuit as much as
possible using the air purge valves. Air present in the water
circuit might cause malfunctioning of the backup heater.
4
Check that the backup heater vessel (EKMBUH) is filled with
water by opening the pressure relief valve. Water must flow out
of the valve.
NOTICE
During filling, it might not be possible to remove all air
in the system. Remaining air will be removed through
the automatic air purge valves during first operating
hours of the system. Additional filling with water
afterwards might be required.
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 should remain
above 1 bar to avoid air entering the circuit.
The unit might dispose some excessive water through
the pressure relief valve.
Water quality must be according EN directive
98/83 EC.
If no glycol is in the system in case of a power supply failure or pump
operating failure, drain the system.
When water is at standstill inside the system, freezing is very likely to
happen and damaging the system in the process.
Piping insulation
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 sealing
materials must be at least 13 mm with λ=0.039 W/mK in order to
prevent freezing on the outside water piping.
If the temperature is higher than 30°C and the humidity is higher than
RH 80%, then the thickness of the sealing materials should be at
least 20 mm in order to avoid condensation on the surface of the
sealing.
Water piping freezing prevention
Protect the water piping against water freezing during the winter
period (e.g. by using an external field supplied heater tape or glycol
solution).
11. I
MPORTANT INFORMATION REGARDING THE
REFRIGERANT USED
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type:
R410A
(1)
GWP
value:
1975
(1)
GWP = global warming potential
EBHQ006+008BAV3 + EKCBX/H008BAV3
Unit for air to water heat pump system
4PW64602-1A – 09.2010
12. E
LECTRICAL WIRING WORK
12.1. Precautions on electrical wiring work
WARNING: Electrical installation
All field wiring and components must be installed by an
installer and must comply with the applicable legislation
DANGER: ELECTRICAL SHOCK
See "2. General Safety precautions" on page 2.
WARNING
A main switch or other means for disconnection, having a
contact separation in all poles, must be incorporated in
the fixed wiring in accordance with the applicable
legislation.
Use only copper wires.
All field wiring must be carried out in accordance with the
wiring diagram supplied with the unit and the instructions
given below.
Never squeeze bundled cables and be sure that it does
not come in contact with the non-insulated piping and
sharp edges. Be sure no external pressure is applied to
the terminal connections.
Power supply wires must be attached securely.
If the power supply has a missing or wrong N-phase,
equipment will break down.
Be sure to establish an earth. Do not earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
Be sure to install an earth leakage protector in
accordance with the applicable legislation. Failure to do
so may cause electric shock or fire.
Be sure to use a dedicated power circuit, never use a
power supply shared by another appliance.
When installing the earth leakage protector be sure that
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
Be sure to install the required fuses or circuit breakers.
CAUTION: Radio frequency interference
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc....
In extreme circumstances you shall keep distances of 3 m
or more and use conduit tubes for power and transmission
lines.
For more details, refer to the "Electrical specifications" on
page 47
Installation manual
21
Advertisement
Table of Contents
