Technical data

i-KI(R) MTD
i-KI(R)_MTD_0031_201110_EN HFC 410A
3
High efficiency range
The i-KI heating only and i-KIR reverse-cycle heat pumps fea-
ture high seasonal efficiency in both heating and cooling mode,
using DC inverter technology to modulate compressor operation
and deliver the exact amount of energy based on the actual
needs of the building.
This excellent result has been achieved by carefully sizing all
the components. Special attention has been paid to all heat
exchange surfaces and the fans.
The use of newly designed condensing coils, with larger sur-
faces and special layout, new asymmetrical evaporators with
better and more efficient refrigerant distribution, both in the liq-
uid and gas phase, and high efficiency fans are some of the
important innovations included with this product.
Careful sizing of the systems this series of units are used with
can mean significant savings in energy consumed and conse-
quently a major reduction in running costs.
Smart Defrost
The heat pumps come with an innovative and patented self-
adaptive defrost system that optimises defrost times, improving
overall unit efficiency.
The strength of this new logic is the ability to automatically
adjust parameters used by the algorithms in each cycle, based
on the outside conditions.
Controlling the evaporation pressure, outside air temperature
and defrost time, give an excellent estimate of ice on the coil,
thus guaranteeing an effective and efficient defrost cycle.
Air-water heat pump
Air-to-water heat pump, available in heating only and reverse-
cycle versions.
Unit supplied complete with non-freezing oil and refrigerant
charge, and factory tested. Only water and electrical connec-
tions are required on site. Unit charged with R410A ecological
refrigerant.
COMPOSITION OF STANDARD UNIT
Structure
Structure made from hot galvanised steel load-bearing base
and panels, painted with polyester power coat. The load-bear-
ing structure that holds together and supports the main compo-
nents is designed to guarantee maximum access for service
and maintenance.
Compressor
Inverter-driven DC brushless hermetic rotary compressors,
complete with thermal protector.
Utility-side heat exchanger
Braze welded AISI 316 steel plate heat exchanger. The heat
exchangers are lined on the outside with a layer of closed-cell
neoprene to prevent condensation.
Source-side heat exchanger
Finned coil heat exchanger made from copper tubes and alu-
minium fins, spaced apart so as to guarantee maximum heat
exchange efficiency. The unit is fitted as standard of the tray
condensate drain.
Electric frost protection heater for the base
Modulating electric frost protection heater for the base, posi-
tioned between the finned heat exchanger and the base to
improve and assist drainage of water during defrosts.
Fans
Axial-flow fans with DC brushless motor, external impeller, with
pressed plate blades, housed in aerodynamic tubes with acci-
dent prevention grill. Fans with continuous speed control by
pressure transducer.
Refrigerant circuit
Main components in the refrigerant circuit:
- refrigerant R410A
- electronic thermostatic valve,
- liquid receiver,
- 4-way reversing valve.
Heat pump electrical panel:
- Compressor discharge temperature probe
- Outside air temperature probe
- Defrost temperature probe
- Compressor suction temperature probe
- Heat exchanger water inlet temperature probe
- Heat exchanger water outlet temperature probe
- Board with alarm signal display and dipswitches
- Inverter board
- Power module
- Board protection fuses
Inside module electrical panel:
- Radio interference suppresser
- Controller/unit interface
- Electronic controller
- Unit ON/OFF relay
- Outlet heater / boiler relay
- Alarm/secondary pump/dehumidifier relay
- Heat/cool relay
- Auxiliary circuit protection fuse
- Controller protection fuse
- Interface protection fuse
The water circuit is completed by:
- 3-speed pump
- Expansion vessel (8 litres)
- Safety valve (3 bar)
- Pressure gauge
- Vent valve
1. DESCRIPTION OF THE UNIT