Small capacity reversible heat pumps with the heating power from 20 kW to 55 kW are designed for small commercial or industrial applications. Manufactured using R290 refrigerant only and full-inverter technology the units are a part of the extremely economical and environmentally friendly Refra product line. These single circuit heat pumps can be used for heating purposes at ambient temperature of -15°or higher as well as for cooling purposes with the capacity of 20 kW to 50 kW. This dual solution is very efficient in terms of price, installation and space, as there is no need to install two separate systems.
Compact frame construction is assembled with highquality EC fan motor technology, finned tube heat exchangers and reciprocating compressors. To prevent ice formation, the frame is equipped with special water drain outlets, which are required to ensure a proper defrosting process. It is also recommended to place the unit on a platform in order to leave some space underneath for water to drain. The galvanized steel and powder coated frame with a reliable insulation material ensures proper unit protection and noise reduction. An additional 30 mm rock wool material can be supplemented for a super silent unit operation with double insulation.
PARTS INCLUDED:
Bitzer Reciprocating compressors with oil charge and oil level monitoring/differential pressure switch;
Polymer powder painted RAL7035 frame;
Frequency inverters on all compressors;
HP/LP pressure switch per circuit;
HP/LP pressure gauges per circuit;
Necessary pressure and temperature probes;
Liquid receiver per circuit;
Air cooled condenser (copper tubes – aluminium fins);
4-way valve for reversible operation;
Single safety valve per circuit;
Filter drier on liquid line per circuit;
Sight glass on liquid line per circuit;
Electronic expansion valve per circuit;
Control board with Siemens Climatix controller;
Suction line accumulator per circuit;
Vibration absorbers;
BPHE evaporator;
R290 leak detector;
Emergency EX fan;
EC Fans;
Muffler.
