Installation manual
15
EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
6.5.
Installation of the EKHBDP drain pan kit (only for
EKHBX models)
For heating/cooling models, it is necessary to install the drain pan kit
(see
During cooling operation, water vapour (humidity) in the air might
condense to liquid and collect on the cold refrigerant and water pipes.
This water is collected in the drain pan, which must be connected to a
drain.
For installation instructions, refer to the instruction sheet delivered
with the drain pan kit.
6.6.
Refrigerant pipework
For all guidelines, instructions and specifications regarding
refrigerant pipework between the indoor unit and the outdoor unit,
please refer to the outdoor unit installation manual.
The location of the gas pipe and liquid pipe on the indoor unit is
shown under
"5.2. Main components" on page 11
6.7.
Water pipework
Checking the water circuit
The units are equipped with a water inlet and water outlet for
connection to a water circuit. This circuit must be provided by an
installer and must comply with the applicable legislation.
6.8.
General precautions concerning water circuit
Before continuing the installation of the unit, check the following
points:
■
The maximum water pressure is 4 bar.
■
The maximum water temperature during space heating is 65°C
(safety device setting) and 75°C
(1)
during domestic hot water
operation (safety device setting). Make sure that the installed
piping and piping accessories (e.g., valve, connections,...) can
withstand the temperatures as shown in the figure below.
1
Outdoor unit
2
Indoor unit
3
Heat exchanger
4
Backup heater
(2)
5
Pump
6
Shut-off valve
7
Motorised 3-way valve (delivered with domestic hot water
tank)
8
Motorised 2-way valve (field supply)
9
Collector (field supply)
10
Domestic hot water tank (optional)
11
Booster heater
(3)
12
Heat exchanger coil
FCU1...3
Fan coil unit (optional)
FHL1...3
Floor heating loop
T
Room thermostat (optional)
■
Provide adequate safeguards in the water circuit to be sure that
the water pressure will never exceed the maximum allowable
working pressure (4 bar).
■
Two shut-off valves are delivered with the unit. To facilitate
service and maintenance, install one at the water inlet and one
at the water outlet of the indoor unit. Mind position of the shut-off
valves. Orientation of the integrated drain and fill valves is
important for servicing. See
■
Drain taps must be provided at all low points of the system to
permit complete drainage of the circuit during maintenance.
Two drain valves integrated in the shut-off valves are provided to
drain the water from the indoor unit water system.
■
Make sure to provide a proper drain for the pressure relief valve
to avoid any water coming into contact with electrical parts.
CAUTION
Make sure to position the pressure relief valve hose end in
the drain pan. Failure to do so might lead to water coming
into contact with electrical parts, resulting in electrical
shocks or short-circuit of the electrical system.
Refrigerant piping
specifications
Indoor unit
Outdoor unit
Gas pipe connection
15.9 mm (5/8 inch)
15.9 mm (5/8 inch)
Liquid pipe connection
6.4 mm (1/4 inch)
6.4 mm (1/4 inch)
CAUTION
When connecting the refrigerant pipes, always use two
wrenches/spanners for tightening or loosening nuts!
Failure to do so can result in damaged piping connections
and leaks.
NOTICE
The unit is only to be used in a closed water system.
Application in an open water circuit can lead to excessive
corrosion of the water piping.
(1) Be sure that the correct field settings are active or selected according to
the applicable tank type. See field settings in
operation and space heating off temperature" on page 28
for more details.
(2) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
M
FCU1
FCU2
FCU3
9
M
FHL1
FHL2
FHL3
10
11 12
6
4 5
3
2
1
6
7
8
T
75
°
C
(EKHTS)
75
°
C
(EKHTS)
65
°
C
(EKHW*)
65
°
C
(EKHW*)
65
°
C
65
°
C
