FWF
Fan coil units
4PW64524-1 – 09.2010
Installation manual
7
3 Prepare the installation of the fan coil unit
■
provide adequate safeguards in the water circuit to be sure that the water pressure will
never exceed the maximum allowable working pressure,
■
provide a proper drain for the pressure relief valve (if installed) to avoid any water
coming into contact with electrical parts,
■
be sure that the water flow rates are according to the table below,
Minimum water speed
(l/min.)
Maximum water speed
(l/min.)
FWF02-05B7TV1B
2.7
18
FWF02B7FV1B
2.7
10.8
FWF03-05B7FV1B
2.7
14.4
Table 3.1: Maximum and minimum water flow
■
provide shut-off valves at the unit so that normal servicing can be accomplished without
draining the system,
■
provide drain taps at all low points of the system to permit complete drainage of the
circuit during maintenance or service to the unit,
■
provide air purge valves at all high points of the system. The valves shall be located at
points which are easily accessible for servicing. A manual air purge valve is mounted
onto the unit,
■
always use materials which are compatible with the water and 40% volume glycol,
■
select piping diameter in relation to required water flow and available ESP (External
Static Pressure) of the pump.
Prepare the electrical wiring work
3.5
Prepare the electrical wiring work
The unit must be connected to the power supply. All field wiring and components must be
installed by an installer and must comply with the applicable legislation.
Warning
A main switch or other means for disconnection, having a contact separation in all
poles, must be incorporated in the fixed wiring in accordance with the applicable
legislation.
Before connecting the electrical wiring, check the following points:
■
use copper wires only,
■
all field wiring must be carried out in accordance with the wiring diagram delivered with
the unit,
■
never squeeze bundled cables and be sure that cables do not come in contact with the
piping and sharp edges. Be sure no external pressure is applied to the terminal
connections,
■
be sure to establish an earth. Do not earth the unit to a utility pipe, surge absorber, or
telephone earth. Incomplete earth may cause electrical shock,
■
be sure to install an earth leakage detector in accordance with the applicable legislation.
Failure to do so may cause electric shock or fire. The earth leakage detector is a field
supplied part,
■
be sure to install the required fuses or circuit breakers. The fuse or circuit breakers are
field supplied parts.
Summary of Contents for FWF02B7FV1B
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