CONSTRUCTION FEATURES

IUB indoor unit
Indoor unit for wall mounting installation:
• Structure: made of galvanised and painted steel plate.
• Water side heat exchanger: adequately insulated stainless steel plates, complete with antifreeze heater.
• Pump unit complete with: EC circulator, automatic air vent valve, safety valve, flow switch, expansion tank, pressure gauge, water filter.
• 3-way valve for the production of domestic hot water.
• Supplementary electrical resistance, system side.
• Control: microprocessor electronic control with touch-screen panel for integrated management of the heat pump and the heating system, according to the various requirements relating to the use of the energy sources:
– 3-way diverter valve management for domestic hot water production.
– Rapid heating function for domestic hot water.
– Anti-legionella cycle function, with activation timer.
– Auxiliary or supplementary heat source management.
– Operation in silent mode with timer.
– Weekly and daily time bands.
– Holiday mode and antifreeze function.
– Power consumption limiting function.
– 2-way on/off valve management for shutting off a part of the system, in heating or cooling mode.
– Management through room thermostat, as an alternative to the touch-screen panel.
– Unit activation from external contact (remote ON OFF), DHW/system mode activation from external contact
– Parental control and start-up menu password.
– Pump contact and 3-way valve status (digital outputs).
• Unit complete with:
– Outdoor temperature probe for set-point compensation.
– Remote ambient air temperature probe, for managing the unit according to the ambient set-point.
– Water temperature probe for domestic hot water tank (20 m).
– Communication cable between outdoor and indoor units.
• RS485 interface for serial communication with other devices (Modbus RTU protocol).
• iOS and Android APP for managing the unit via smartphone and tablet.

MHAITI outdoor unit
• Compressor: hermetic, twin rotary DC Inverter with steam injection, complete with thermal protection and casing heater
• Expansion valve: electronic.
• Cooling circuit with economiser
• Air side heat exchanger: finned coil with copper pipes and aluminium-manganese fins with Golden Fin anti-corrosion treatment in epoxy resin and hydrophilic treatment, complete with protection grilles.
• Fan: axial type impeller with DC brushless motors, equipped with internal thermal protection, accident protection grilles and proportional electronic device for continuous fan rotation speed adjustment.
• Structure: made of galvanised and painted steel plate RAL9002, complete with condensate drain pan and unit base antifreeze heater.

MODELS

MHAITI+USB: 2-section air-water heat pump.

SEPARATELY SUPPLIED ACCESSORIES

KSA – Rubber anti-vibration mounts.
KPRE – Wiring for RS485 serial connection to the touch-screen panel.