E-
16
Pipe work (Continued)
Water pipe work
The hydro unit is equipped with components listed on the table below.
The hot and cold water supply connections are clearly marked on the unit with labels. And service valves
are provided.
Whole water plumbing system including Hydro unit shall be installed by a qualified technician and must
comply with all relevant European and national regulations.
Allowable water pressure of hydro unit is maximum 3.0 bar.
2 service valves are provided with the Hydro unit. To facilitate service and maintenance work, install
R-Type service valve at the water inlet of the hydro unit and L-Type service valve at the water outlet of the
hydro unit.
An air-vent valve is integrated on the hydro unit.
Please check that air purge valve is not overtightened so the air purge valve can release any air out of the
system during system operation.
Name
Tightening Torque
Hydro unit
1
1.25” BSPP
350~380 kgf•cm
34 ~ 37 N•m
2
3/8” BSPP
120 ~ 150 kgf•cm
12 ~ 15 N•m
3
Pressure relief valve
120 ~ 150 kgf•cm
12 ~ 15 N•m
4
Air-vent valve
120 ~ 150 kgf•cm
12 ~ 15 N•m
5
Manometer
200~230 kgf•cm
19 ~ 23 N•m
6
Flow switch
72~82 kgf•cm
7 ~ 8 N•m
7
Strainer
350~380 kgf•cm
34 ~ 37 N•m
3
4
2
6
5
7
1
NH080PHXEAHydro unit_IM_E 32659-1.indd 16
2010-07-28 ｿﾀﾈﾄ 8:59:25
