Manual selection, installation and maintenance
19
Roof-top units -
RTE series
-
Pu [Pa]
BR
T 3
BR
T 2
rpm=1600
rpm=1550
W [m
3
/h]
SUPPLY FAN STATIC PRESSURE
RTE 080 - 090
KEY
Pu
Available static pressure
W
Total air flow
BRT2 Two-rows coil pressure drop
BRT3 Three-rows coil pressure drop
SUPPLY FAN STATIC PRESSURE
RTE 100 - 200
KEY
Pu
Available static pressure
W
Total air flow
BRT2 Two-rows coil pressure drop
BRT3 Three-rows coil pressure drop
V A R I A T I O N O F T H E
MOTOR RPM
To set the ventilation static pressure to
the installation requirements, the spe-
eds of the fans may be regulated.
Proceed as follows:
– remove the inspection panel;
– loosen the nuts securing the motor
to its mounting assembly;
– remove the drive belt;
– loosen the lock by means of a
wrench and turn the mobile part
of the pulley to obtain the required
diameter;
– tighten the lock;
– replace the belt, adjust its tension
and fasten the motor nuts;
– replace the inspection panel.
Each rotations of the mobile part
pulley corresponds to a variation of
approx. 30 rpm in the fan speed.
For accurate setting check the fan shaft
speed with a suitable instrument.
The units are normally supplied with
pulley regulated to obtain the fol-
lowing speeds:
rpm=1240
Pu [Pa]
W [m
3
/h]
BRT3
BRT2
MODEL:
025 030 040 050 080 090 100 150 200
Rpm
- - - -
1548
1600
1110
1180
1240
