CLIMAVENETA HWD 602 Manual Del Usuario página 59

A
Each model of unit is supplied with the fan performance
characteristics, maximum, medium and minimum speed as
shown in the respective diagrams of each unit for the
curves A, B or C.
If these characteristics need to be improved to counteract
additional pressure drop and maintain nominal air flow
constant, an additional safety margin is available. This is
shown in curve D.
Maximum flow can be increased by using the trimmer RP1
on the control board inside the switchboard.
Access the board by removing the switchboard cover. In-
creasing maximum speed (by rotating trimmer RP1 anti-
clockwise) automatically increases the medium and mini-
mum speed by the same amount.
Reducing maximum speed (by rotating the trimmer RP1
clockwise) reduces the difference between maximum and
medium speeds and minimum speed.
For convenience, the difference between the maximum
Model HWD
Voltage at minimum speed (V)
Voltage at medium speed (V)
Voltage at maximum speed (V)
Note:
The adjustment obtained using the above method is ade-
quate but not precise.
HWD
speed set (curve A) and the maximum speed available
(curve D) has been divided into seven equal parts as repre-
sented in the respective diagrams.
The voltage increase corresponding to each curve is given
by the formula:
V1= (230V - V)
V1= voltage increase
V = voltage at max set speed (see table)
Identifying the curve corresponding to the pressure drop
to be overcome also gives the voltage for calibrating maxi-
mum speed using trimmer RP1: [voltage at maximum speed
+ (V1 x no. curve)]. Always verify the voltage at the fan af-
ter every new calibration.
The calibration voltages for the various speeds for each
model are given below:
602 703
110 110
120 120
140 140
It is therefore good practice to check the actual air flow by
measuring the air speed in the duct.
FAN CALIBRATION MODE HWD
7
804 904
110 110
140 140
187 187
1003 1104
110 120
135 140
155 180
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