Operating Principle; Humidity Regulation; Operation With Distribution In The Room (Or Single-Branch) | P25 = 0 - Elsteam EHPN Series Operating And Maintenance Manual

10.1 Operating principle

The EHPN series is the ELSTEAM solution for high-pressure adiabatic air humidification systems.
The EHPN series consists of 2 elements:
• Pump unit;
• Distributionrackwithnozzles.
The EHPNhigh-pressureadiabatichumidifierproducesmistbyconveyinghigh-pressurewater(80bar)inadistributionrack
composedofnozzles.Microscopicholesinthenozzlesatomisethewaterintoafinemist,whichisabsorbedbytheairinthe
duct.
The EHPN series adiabatic humidification system regulates its operation according to the humidity request from the
distributionrack(s).Whenthereisahumidityrequestfromthesensororexternalsignal(dependingontheconfiguration),
eachrackopensoneormoresolenoidvalvessothatthenozzlesinstalledonthedistributionbranchesproducemist.
The droplet separator (optional) is used to stop and water droplets that were not atomised before entering the duct.
High Pressure Pump
Low Pressure
Warer In

10.2 Humidity regulation

The humidity can be regulated in two ways:
• Operation with distribution in the room (or single-branch) | Parameter P25 = 0;
• Operation with distribution in the duct | Parameter P25 ≠ 0;

10.2.1 Operation with distribution in the room (or single-branch) | P25 = 0

Withdistributionintheroom,thehumiditycanberegulatedintwoways,dependingonhowtheCFGp parameter is set in the pump
unit user interface:
• ON-OFFregulationintheroom(CFGp=0-1);
• Regulation with the humidity sensor (CFGp=HUM).
Operationwithdistributionintheroom(orsingle-branch)doesnotinvolveusingthedistributionrack,butapipe(withnozzles)
issimplyconnectedtotheoutletforthedistributionracks.
ON-OFF regulation in the room
To use the EHPNwithON-OFFregulation,thefollowingconditionsmustbemet:
• CFGp=0-1;
• P25=0;
• Enable digital input closed (CV);
• RemoteON/OFFdigitalinputclosed(0/1).
When digital input S0isclosed,theEHPN produces humidity at the maximum value set in parameter r6.
Regulation with the humidity sensor in the room
To use the HPNwithregulationusingahumiditysensor,thefollowingconditionsmustbemet:
924EHPNE4.01 - EHPN series humidifiers
M
I
T
P
Fig. 66. Operating principle diagram
Rack Input Solenoid
Pump Unit
PS
High Pressure
Water Out
Rack Drain
Solenoid
| 78 | Operation |
Rack Unit
Rack line Solenoid
Rack line Solenoid
Rack line Solenoid
02/2024