28
English
5.4 - Water Connections
Refer to the
Safety Information Manual
.
• No need to use a counter spanner when tightening
hydronic connections to the module.
• Use only water mixed with any water treatment
product to avoid bacteria and dirt proliferation in the
circuit.
• Place valves (not included) at the inlet and outlet of the
hydronic module.
• Use pipe of 1" or bigger for connections between the
hydronic module and terminal.
• Wrap the connections with the anti-condensate
insulation and tighten with tape, without exerting
excessive pressure on the insulation.
• Start the water filling when all the installation
connections are complete.
Maximum distance between 3-way valve and hydronic
module: 3 m.
Maximum distance between domestic hot water tank and
hydronic module: 10 m
5.5 - Refrigerant Connections
Refer to the
Safety Information Manual
.
For piping lengths, refer to the Outdoor unit manual.
5.6 - Pump Speed Selection
The pump provided with the module is a variable speed
circulator. The installer selects the speed of the module
pump to guarantee the target flow rate (± 20 %) in the
space heating/cooling loop, knowing the available pressure
of the system at different pump speed (see fig. 13, 14 and
15
) and the pressure drop of the installation.
Make sure that the pressure drop in the domestic hot
water loop is not too low. If needed, install a valve to
modulate the pressure drop; in this loop, inlet/outlet
temperature difference should be 8-10 °C.
Hydronic
Module
80AW - 150
80AW - 115
80AW - 150
CDU
38AW
050
38AW
065
38AW
090
38AW
115
38AW
120
38AW
150
Nominal
Capacity
[kW]
5.0
6.5
9.0
11.5
12.0
15.0
Nominal
DT [° C]
5
5
5
5
5
5
Nominal
Flow Rate
[lt/h]
860
1118
1548
1978
2064
2580
The operating red knob allows to set several pressure
levels in 2 control modes :
• Variable differential pressure (
Δ
p-v)
• Constant differential pressure (
Δ
p-c)
Variable differential pressure (
Δ
p-v)
Constant differential pressure (
Δ
p-c)
Venting function
Min flow=1 ; Max flow=8
“Set Up” procedure :
Factory pre-setting =
Δ
p-c 8
All functions can be set, activated or deactivated by using
the operating red knob :
• the control mode
Δ
p-v is set on the left of the middle
position (from 1 to 8).
• the control mode
Δ
p-c is set on the right of the middle
position (from 1 to 8).
• for venting the pump, turn the knob in its middle
position (the venting function is activated after 3 seconds
and lasts 10 minutes before going to
Δ
p-c max mode).
Note :
* The variable pressure mode (
Δ
p-v) is recommended in
heating systems with radiators.
* The constant pressure mode (
Δ
p-c) is recommended for
underfloor-heating circuits.
* All hydronic curves have been defined in constant
pressure mode for min, medium and max speed.
