Technical data
14 i-KI MTD / i-KIR MTD EN 10/2010
Factory connections Installer connections
1
2
11
11
12
12
UTILITY
RETURN
UTILITY
OUTLET
9
8
7
13
3
T
6
13
13
T
6
F
5
4
2
10
1
1
9
1 Pressure gauge
2 Vibration damper joint
3 Shut off valve
4 Calibrating valve
5 Flow switch (obligatory)
6 Thermometer
7 Pump
8 Safety valve
9 Expansion vessel
10 Wire mesh filter
11 Temperature sensor
12 Unit fill/drain valve
13 System vent
Utility water circuit connection diagram
WATER CONNECTIONS
I A
System circuit connection
• Use a flat gasket to ensure tightness
• Connect the flexible joints to the probe socket fittings
installed on the heat pump
• Connect the system pipes to the flexible joints
• Use two spanners to tighten the water connections
• Install the filter on the system return pipe
Maximum water content in the system
The heat pump is supplied with expansion vessel for the
SYSTEM (NOT FOR DOMESTIC HOT WATER) and a 3 bar
safety valve.
The expansion vessel is suitable for the radiant panel sys-
tem, hydronic terminal system and radiator system with fol-
lowing installation maximum water content *:
* expansion vessel pre-charged to 150 kPa (max 12 metre
height difference)
The expansion vessel pre-charge pressure depends on the
height the heat pump is installed at.
To determine the pre-charge value, proceed as follows:
Vessel pre-charge = H + 0.3
H in bars (10 metres ~ 1 bar)
For height differences exceeding 12 metres, the volume of
water in the system as described above may decrease;
evaluate whether the expansion vessel supplied is sufficient
for each system, otherwise install an additional expansion
vessel.
H
Water content in the system
The minimum system water content must be guaranteed at
all times.
Expansion vessel size
Safety valve calibration
Size
Radiant panel
system
Hydronic
terminal system
Radiator
system
Hot water at 35°C
and cold water
at 18°C
Hot water at
45°C cold water
at 7°C
Up to 60°C
0011m l 300 180 100
0031m l 400 240 135
0061m l 400 240 135
Size 0011 0031 0061
Minimum water content l 26 26 60
Size 0011 0031 0061
Expansion vessel l 6 8 8
Size 0011 0031 0061
Safety valve bar 3 3 3