Technical data

13EN 10/2010 i-KI MTD / i-KIR MTD
WATER CONNECTIONS
I A
Risk of freezing
The unit must be prevented from freezing at outside air tem-
peratures around 0°C.
1. use suitable percentages of antifreeze (see “Ethylene
glycol solutions”)
2. protect the piping with heating sheaths,
In caso di unità ferma per un lungo periodo di tempo si con-
siglia di svuotare l’impianto verificando che non vi siano
ristagni d’acqua nei punti più bassi dell’impianto o rubinetti
chiusi nei quali si possa fermare dell’acqua.
It is recommended to use non-toxic food grade antifreeze,
compliant with the standards in force in the countries where
the unit is used, if domestic hot water production is also fea-
tured.
The antifreeze used must be corrosion inhibited and com-
patible with the water circuit components.
cPf
cQ
cdp
0
1
1
1
12%
0,985
1,02
1,07
20%
0,98
1,04
1,11
28%
0,974
1,075
1,18
35%
0,97
1,11
1,22
40%
0,965
1,14
1,24
Ethylene glycol solutions
Water and ethylene glycol solutions used as a heat carrier in
the place of water reduce the performance of the unit.
Multiply the performance figures by the values given in the
following table.
The heat pumps must be fitted with a filling/top-up sys-
tem connected to the return line and a drain valve in the
lowest part of the system.
Systems filled with antifreeze or subject to special leg-
islative requirements must be installed with low-loss
headers.
0 -5 -10 -15 -20 -25
Freezing point (°C)
Percentage of ethylene glycol by weight
cPf: cooling capacity correction factor
cQ: flow rate correction factor
cdp: pressure drop correction factor
Water quality
The manufacturer is not liable for obstruction, breakage
or noise resulting from the failure to install filters or
vibration dampers.
Particular types of water used for filling or topping up
must be treated with appropriate treatment systems.
For reference values, see the table.
PH 6-8
Electrical conductivity less than 200 mV/cm (25°C)
Chlorine ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 50 ppm
Sulphur ions none
Ammonia ions none
Silicon ions less than 30 ppm
f1: capacity correction factor
fk1: compressor power input correction factor
fx1: total power input correction factor
Fouling factors
The performance data given refer to conditions with clean
evaporator plates (fouling factor = 1).
For different fouling factors, multiply the figures in the perfor-
mance tables by the coefficient given in the following table.
4,4 x 10
-5
0,86 x 10
-4
1,72 x10
-4
-
0,96
0,93
-
0,99
0,98
-
0,99
0,98
Fouling factors
(m
2
°C/W) f1
Evaporator
fk1 fx1
Probe socket fittings
- Remove the protective caps from the water connections
- Install the probe socket fittings supplied on the system cir-
cuit inlet and return. For i-KI/i-KIR 0011m units, install
the 1"-3/4" reducers as standard between the probe
socket fittings and water connections. To fasten the
probe socket fittings use two spanners. Place probe BT1
on the inlet connection and BT2 on the outlet connection.
Warnings: use conductive paste to improve the tempera-
ture reading.
Fasten the probes placed in the probe sockets to the fittings,
using suitable ties.
Water outlet connection
Probe socket
Water return connection