Midea R410A Direct Heating Type HPWH 50Hz Technical Manual MCAC-HTSM-201906
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Ensure there is enough air flow to supply the heat exchanger, take influence of down draft caused by tall
building around the unit to air discharge into condenser when installing.
If install the unit at a place where ventilation is drastic, such as exposed roofs, short wall or louvers can
be applied in case of turbulence disturbs air inlet. If short walls are applied, it should be shorter than the
unit. Distance between short walls or louvers to unit should either satisfy requirements of unit
installation minimum intervals.
If the unit runs in winter, and the location has accumulated snow, the unit should stand higher than
snow in order to let airflow get through heat exchanger fluently.
If the unit is installed in the basement, ensure air around the unit and outdoor air can circulate without
obstruction.
2.6 Water pipeline system
Water pipe joint specifications of single unit.
Table 3-2.1: Water pipe joint specifications for single unit
Water pipeline system design and construction must meet the national water and heating pipeline
design requirements and relative standards.
All the pipes are recommended to use PPR pipe, and the PPR pipe specificatons refers to up table.
It must prevent dust and other sundries enter into the pipeline system during the pipeline installation
and connection.
The water flow switch which is used to detect the circulating water flow volume should be prepaired in
site. The cut-off value of water flow switch is not less than (0.1m3/h×amount of units).
Only after unit is fixed, the water pipes can be installed.
Use thermal insulation material to wrap the inlet water pipe, outlet water pipe and circulative water
pipes.
The pipe diameter of main water pipes:
Table 3-2.2: Water pipe joint specifications for multi units RSJ-120/ZN1-540V1
Amount of units connected in parallel
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