Technical data

12 i-KI MTD / i-KIR MTD EN 10/2010
WATER CONNECTIONS
I A
(1”)
water return
(1”)
water outlet
180 110
60 90
388 54
57 43
(3/4”)
water
return
(3/4”)
water
outlet
Water connection dimensions
0011m
657 120
(1” 1/4)
water outlet
(1” 1/4)
water return
67 70
0061m
0031m
The choice and installation of components is the responsibil-
ity of the installer who should follow good working practice
and current legislation. Before connecting the pipes, make
sure they do not contain stones, sand, rust, dross or other
foreign bodies which might damage the unit.
Construction of a bypass is recommended to enable the
pipes to be washed through without having to disconnect
the unit (see drain valves). The connection piping should be
supported in such a way as to avoid it weighing on the unit.
Required components
The following components must be installed in the
water circuit:
1. A flow switch (inlet). The flow switch must be cali-
brated by the installer to a value equal to 70% of rat-
ed flow (obligatory).
2. An intake filter must be installed as close as possi-
ble to the evaporator and positioned to allow easy
access for routine maintenance.
Recommended components
The following components should be installed in the water
circuit:
1. Two pressure gauges with a suitable scale (intake and
outlet);
2. Two vibration damper joints (intake and outlet);
3. Two shut off valves (normal in intake and calibrating in
outlet);
4. Two thermometers (intake and outlet);
5. All the pipes must be insulated with suitable material to
prevent the formation of condensate and heat loss. The
insulating material must be a vapour barrier. Make sure
that the control and shut off devices protrude from the
insulation.
6. At the lowest points in the system, install drain valves for
easy emptying.
7. At the highest points in the system, install automatic or
manual air vent valves.
8. The unit is fitted as standard with an expansion vessel (8
liters); make sure this is correctly sized for the water
content of the system and the expected operating tem-
perature, otherwise install an additional expansion ves-
sel.
Failure to install the flow switches will mean the heat
exchangers are not protected in the event of no flow of
liquid. The Manufacturer cannot be held liable for any
damage to the unit and/or the system following the fail-
ure to install these devices or the filter.
The correct operation of the components that help
ensure the safety of the appliance and the system
should be checked regularly.
Specifically, this involves cleaning the filters and check-
ing the operation of the flow switches installed.
Make sure that the frost protection heaters on the heat
exchanger are powered when the unit is off.
Water flow to the chiller unit must conform to the values
shown in the section on “General Technical Data”.
The flow of water must be maintained constant during oper-
ation. The water content of the unit must be such as to avoid
disturbing operation of the refrigerant circuits.