2.9 Filter maintenance indicator
Feature
Data
Indicator range [psi]
0 – 0.8
Tab. 12 Filter maintenance indicator
2.10 Pressure display
Feature
Data
Indicator range [psig]
0 – 23.2
Tab. 13 Pressure display
2.11 Sound pressure level/sound power level
Operating state LOAD under the following conditions:
■ Nominal speed
■ Nominal flow rate
■ Nominal pressure
Measuring condition according to DIN EN ISO 2151 and basic standard ISO 9614–2:
■ Measurement distance: 3 ft
■ Tolerance: ±3 dB(A)
■ Sound insulated pipeline
Further information The sound pressure level and sound power level values for your machine are provided in the ta‐
bles shown in chapter 13.4.
These values refer to the design condition.
2.12 Power Supply
Basic requirements
The machine is designed for an electrical supply according to National Electric Code (NEC), edi‐
tion 2017, particularly article 670 and NFPA 79, edition 2015, particularly section 4.3. In the ab‐
sence of any user-specified alternatives, the limits given in these standards must be adhered to.
Consult manufacturer for any other specific power supply.
The incoming line within the control panel should be as short as possible.
If external sensors or communication lines are to be connected to the machine, use shielded ca‐
bles and insert the same through EMC fittings into the control panel.
Three-phase
Do NOT operate package on any unsymmetrical power supply. Also do NOT operate package on
power supplies such as a three phase WYE system with center point not solidly grounded or three-
phase (open) delta.
2
Technical Data
2.9
Filter maintenance indicator
8
Installation and Operating Manual Rotary lobe blower
HBPI pr
Number: 9_9572 28 USE
