![background image](http://html1.mh-extra.com/html/midea/rsj-420-pzn1-h/rsj-420-pzn1-h_technical-manual_1791198034.webp)
MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
34
2.6 Water pipeline system
Water pipe joint specifications of single unit.
Water inlet pipe joint
Water outlet pipe joint
RSJ-420/SZN1-H
DN32
DN32
RSJ-800/SZN1-H
DN50
DN50
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 (0.1m
3
/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:
RSJ-420/SZN1-H
Amount of units connected in parallel
Water inlet pipe joint
Water outlet pipe joint
1
DN32
DN32
2
DN50
DN50
3
DN65
DN65
4
DN80
DN80
RSJ-800/SZN1-H
Amount of units connected in parallel
Water inlet pipe joint
Water outlet pipe joint
1
DN50
DN50
2
DN80
DN80