Commissioning
Sentinel Kinetic MVHR Installation & Commissioning
36
Proportional 1 Screen
The Proportional 1 screen enables the conditions of the
proportional sensors to be set.
The unit can receive a 0-10 V proportional signal from
either a humidity, CO
2
or temperature external sensor,
when connected to terminals P1.
By default, the Proportion 1 input is set for a humidity
sensor operation.
When you have selected the sensor type, screens for
the appropriate boost and normal limits are displayed.
Press
and use the
and
buttons to change the
selection (
Humidity
-default,
CO2
,
Temperature
).
When the input signal is below the ‘Normal Limit’, the
unit runs at low / normal airflow. When the signal is
above the ‘Boost Limit’, the unit runs at boost airflow.
Between these limits the unit runs at a proportional
airflow.
Proportional 1
Humidity
For a humidity sensor, a percentage value must be
entered for boost and normal settings. For range and
default values, see
Table 2
below.
P1 Boost Limit
70 %
P1 Normal Limit
60 %
For a CO
2
sensor, a figure (in ppm) must be entered for
boost and normal settings. For range and default
values, see
Table 2
below.
P1 Boost Limit
2000 ppm
P1 Normal Limit
1000 ppm
For a Temperature sensor, a figure (in degrees C) must
be entered for boost and normal settings. For range
and default values, see
Table 2
below.
P1 Boost Limit
27 C
P1 Normal Limit
17 C
Table 2: Boost & Normal Limits – Defaults and Adjustment Range
Sensor
Humidity
CO2
Temperature
Default (%)
Range (%)
Default (ppm)
Range (ppm)
Default (
°
C)
Range (
°
C)
Boost limit
70
25-90
2000
200-2000
27
10-35
Normal limit
60
25-90
1000
200-2000
17
10-35
Proportional 2 Screen
By default, the Proportional 2 input is set to CO
2
sensor
operation.
See
Proportion 1 Screen
for a description.
Proportional 2
CO2
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