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MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
38
Water cycle pump selection:
RSJ-420/SZN1-H
Circulative heating rated water flow
7 m
3
/h
Water resistance of circulative rated water flow
160 kPa
RSJ-800/SZN1-H
Circulative heating rated water flow
14 m
3
/h
Water resistance of circulative rated water flow
160 kPa
The hot water circulative pump must use hot water pump; the temperature resistance of the
circulative water pump cannot lower than 80°C.
Rated head of circulative pump:
ΣOn-way resi ΣLocal resi Unit resistance
Rated flow of circulative pump:
Rated flow of a single circulation heating unit × Circulating unit quantity
2.8 E-heater capacity selection
As the requirement, the auxiliary electric heater can be selected. The host unit provides the
passive control signals of the auxiliary heater.
The installation location of the auxiliary heater must strictly comply with the installation
schematatic diagram.
Rated heating capacity of total unit × 10%~30%.
E-heater can apply the pipe-type or water tank E-heater. After installation, it must through
dialing codes to choose the relative E-heating mode, otherwise it will damage the unit or