Mitsubishi Electric Ecodan HUS210FTC4ST Installation Manual page 35

Ecodan Installation
®
23
(continued)
Note: The water velocity in pipes should be kept within certain limits of the material to avoid erosion, corrosion and
excessive noise generation. Be aware, and take care of velocities in small pipes, bends and similar obstructions that
can exceed the values above. E.g.) Copper : 1.5m/s
WATER QUALITY CONDITION:
The water in a system should be clean and with a pH value of 6.5-8.0
The following are the maximum values:
Calcium: 100mg/L
Chlorine: 100mg/L
Iron/Maganese: 0.5mg/L
Note: Make sure to perform the frozen prevention measure for water pipe system. (Water piping insulation, back-up
pump system, using of a certain % ethylene glycol instead of normal water). Insulate the water piping properly. The
performance can be poor if the insulation is insufficient.
WARNING
A the outlet water temperature can reach 60°C at maximum, do not touch the water piping directly with a bare hand.
Electrical Work:
OUTDOOR UNIT: Remove the service panel Wire the cables referring to the Fig 3.12 and the Fig 3.13
FTC4 Installation Manual
35