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EH-

net

EH-105

Air handling
unit controller

Ouman EH-105 is an intelligent air handling unit
controller that is suitable for all kinds of applications.
The controller s diverse and innovative control
solutions are as easy to use as the other Ouman
controllers that have a reputation for user friendliness.
The controller makes it possible to maintain optimal
air handling in spite of changing conditions in the
room to be ventilated (temperature, CO2 content,
channel pressure, increase in humidity).

In addition to normal week/24 hour clock functions,
EH-105 has a yearly clock that makes it easy to
create air handling unit controls for certain times
of the year (e.g., summer holidays, sundays during
the week, etc.)

Alarms can be received and acknowledged, time
programs and settings can be adjusted and
measurement data can be read quickly via text
messages. A GSM modem must be connected to
the controller to be able to use a GSM.

Control sequences:

Dampers

HRU

Heating

Cooling

Fan control

Web-based remote control takes 

place via EH-net server (optional 

equipment).

GSM use requires that a GSM 

modem  (optional equipment) has 

been connected to the controller.

www.ouman.fi

User manual

Remote control options:

EH-net
Web based user interface

GSM Control
Traditional text message use with all

GSM phones

Other remote control opitions
Possibility to join SCADA solutions using
Modbus or LON protocol by means of
adapter card (optional).

Fan controls:

Contactor controlled AH units

AC converter controlled AH units

Summary of Contents for EH-105

Page 1: ...of the year e g summer holidays sundays during the week etc Alarms can be received and acknowledged time programs and settings can be adjusted and measurement data can be read quickly via text messag...

Page 2: ...Browse button moves the cursor up and down Group select button moves you from one control sequence to the next Dampers HRU Heating Cooling AH unit control Symbols for control Header text E g Sports ha...

Page 3: ...ing Cooling 24VAC controls Text message connection via the bus Text message connection via GSM modem Maintenance NTC measurements Transmitter measurements B alarms Using the browser Measurements 5 12...

Page 4: ...ler AH unit shut down Continuous control selected from the controller AH unit at max output Timer control selected from the controller AH unit at min output Timer control selected from the controller...

Page 5: ...Ret Wat Exh aft HRU SuppAfterHRU RemoteSetPot FreeMeasurem 50 50 C 30 100 C 30 100 C 30 100 C 30 100 C 30 100 C 30 100 C 30 100 C 30 100 C Transmitter measurements strip connectors 7 11 The setting r...

Page 6: ...s shorter than the old name the extra characters are replaced with an empty character If the new name is longer the text editor will give the letter that has been fed last as the new letter The charac...

Page 7: ...sent when a STOP command is set from the controller STOP maintenance also stops control from the running permit relay R3 MIN timer h MAX timer h 0 00 0 00 In this mode the air handling unit control m...

Page 8: ...controller is at or when a STOP command comes from the bus An also shuts down the AH unit The AH unit is shut down by relays 1 and 2 Emergency STOP Maintenance STOP A alarm as well as running permit...

Page 9: ...h has been shut down starts up at full output and the dampers go to the night heating position see p 34 N HeatPosit When the room temperature rises by the amount of the hysteresis the controller shuts...

Page 10: ...output maximum output when the CO content rises to the CO Maximum value given here The controller switches the AH unit output to minimum output when the CO content has been 200 ppm below the CO Maximu...

Page 11: ...or Room temperature setting during night heating or Supply temperature setting or Temperature setting when the temperature control switch is turned off This is another setting for the room exhaust or...

Page 12: ...utlined in the operating instructions on pages 44 45 12 Connection info 1 Outdoor temp 2 Supply temp 3 Exhaust temp 4 Return water 5 SupplyAft HRU 6 7 HRU frostPDE 8 SF press 9 EF press 10 SF filterPD...

Page 13: ...ally or manually operated either mechanically or electrically Each control sequence has factory set automatic control AHU 1 1 Autom Room temp 21 2 SupplyTemp20 4 Selection M M C C OPERATING INSTRUCTIO...

Page 14: ...n the special calendar for a certain day of the year A week program An extra eighth day program With the a normal calendar weekday can be changed to some other weekday It is also possible to give a co...

Page 15: ...program Reply message 1 Reply message 2 There is a max of 5 connecting moments in one reply message When a week day is changed the AH unit runs at the normal starting situation output of the changed...

Page 16: ...e AH unit Supply or exhaust air temperature is above the Fire risk value see p 24 The controller shuts down the AH unit AH unit heating s circulating pump s temperature relay alarm The controller shut...

Page 17: ...breaks When the controller has given a fan speed running command and does not receive running information for 35 s the controller gives a contradiction alarm SF running info EF running info SF runnin...

Page 18: ...en the GSM sends the same message back to the controller If the alarm is not acknowledged by GSM 1 within 5 min the controller sends the text message again to both GSM numbers Before acknowledging an...

Page 19: ...the adjoining picture Press ESC OK Press the button to move cursor to Language kieli Press OK Language kieli Suomi English Svenska P cc Estonian Press the button to move the cursor to the language yo...

Page 20: ...AHU output info Connection info ControlOperMode Clock functions Alarms Language kieli Type info Initializ modem Mainten mode AHU 1 1 Autom Room temp 21 2 SupplyTemp20 4 Selection C C OPERATION CODE o1...

Page 21: ...m Room temp 21 2 SupplyTemp20 4 Selection C C Initializ modem appears on the menu only if the modem has been taken into use stripconnector B D pins are connected Press to send initializing commands to...

Page 22: ...1 immediately receives the alarm information If the alarm is not acknowledged the controller sends a new text message to both GSM numbers 5 minutes after the alarm has appeared AHU control SETTINGS S...

Page 23: ...factory settings locking the controller s user menu LON settings initializing bus measurements as well as modem settings and text message settings Press until the display no longer changes You are th...

Page 24: ...ng risk set value of 4 C The cut off point during a trial run is above the set value of 20 C The number of degrees that StartIncrease raises the controller determined supply air temperature during the...

Page 25: ...perature when raising the room temperature The recommended setting for displacement air handling is approx 2 C If the supply air does not fall to floor level in an air heated room lower this setting a...

Page 26: ...temperature is higher than the set cooling inhibit set value and 2 The room temperature is higher than the room temperature setting by the amount of the heating cooling hysteresis and 3 The heating ou...

Page 27: ...s reached maximum output the dampers are driven to the heating period s minimum limit When the temperature must be increased the dampers are driven to the minimum limit of the heating period and after...

Page 28: ...DE EF FanPDE measurements min max air flow control if SF press EF press measurements are not connected The controller controls the fans to a constant rotation speed by s Settings are given in the main...

Page 29: ...OutpLim cascade control can be used in AC freq converter controlled AH units The function is not in use during heaing when the HeatBoost setting is at 0 The function is not in use during cooling when...

Page 30: ...Supply air unit channel pressure setting or SF FanPDE Attention Setting the SF control too high may limit realization of channel pressure Control by exhaust air fans s AC freq converter 0 10V control...

Page 31: ...converter controlled AH unit output A maximum output is reached when the room temperature deviates from the set value by the HeatBoost set value 1 C In contactor controlled AH units the controller dr...

Page 32: ...tion alarms for SF and EF fans Select Mainten mode Actuator alarm Select Mainten mode AHU stop alarm Instr p 23 AHU start after alarm is deactiv Contr acknowl Also remoteAck Alarm selections are made...

Page 33: ...ition of constant position dampers can only be driven by a voltage controlled actuator ppm Fresh air damper minimum position 600 1000 30 100 Summer function reverse With the reverse summer function th...

Page 34: ...ange is 5 150s The character is at the selected control mode 34 Settings Pre opening DampStdMix Min posit Max posit Min CO2 ppm Max CO2 ppm Posit OutdT N HeatPosit Min Cooling 0 30 30 100 600 1000 0 3...

Page 35: ...d in the HRU which is driven to a higher output when the temperature needs to be increased HRU has a reverse summer function When it is warmer outside than inside and when half of the hysteresis betwe...

Page 36: ...en the outdoor temperature is above 7 C Control of HRU output when the AH unit is shut down set the cube HRU at 100 and other HRU s at 0 Attention Cleaning function At the 0 setting the controller dri...

Page 37: ...ection function is not in use Factory setting Setting Range Explanation Heating Operation mode Settings Tuning values Actuator Operating mode Radiator ElectricHeater Not in use PostVentilat if alarm s...

Page 38: ...ype control magnetic valves or continuous control glycol cooling can be used with mechanical cooling The cooling unit running permit can be obtained from strip connectors 42 43 or 51 activated in actu...

Page 39: ...inimum limit PI control is set with P min limit and I min limit settings When the supply air temperature drops below the set minimum value the supply air temperature minimum limit s PI controller begi...

Page 40: ...tions as follows When the supply air temperature exceeds the supply air temperature set value and the set reverse delay time has passed the PI controller begins increasing the actuator control When th...

Page 41: ...t be higher than the cooling set value and actuator control is above 2 Attention The cooling unit running permit is deleted if actuator control of cooling has been at 0 for 20 min Glycol cooling pump...

Page 42: ...asurement channels 1 6 can also be used for receiving On Off information Taking On Off information into use see p 44 Use of NTC measurement channel for receiving On Off inputs Meas 3 Meas 4 Meas 5 Mea...

Page 43: ...s time constant CO2 content of air Room air humidity percentage or remote setting potentiom transmitter 0 10V Supply air flow speed used for flow detector function Exhaust air flow speed used for flow...

Page 44: ...UTO Switch Emerg Stop S SF 1 2 run EF 1 1 run EF 1 2 run SF fConvOver EF fConvOver SF fan PDS EF fan PDS Pumprun Pump run Pump run SF 1 1TRela SF 1 2TRela F 1 1TRela EF 1 2TRela Pump T Rela Pump T Rel...

Page 45: ...ing information on off input or strip conn 81 is received A contradiction alarm is also given by the Actuator alarm AH fans ContradicAlrm selection if running information has not been received and the...

Page 46: ...lly heated AH units do not have post ventilation In the event of an alarm the dampers remain in the selected position Pump T Rela Contact information from the HRU pump s temperature relay When the con...

Page 47: ...de OK OK ESC Clears the alarm buffers and alarm history The operation code includes the following information about controller settings Attention When settings are restored the items included in the f...

Page 48: ...m Move the cursor to the measurement you want and press If you want to select a series traffic bus for the measurement in question move the cursor to Bus and press The character indicates that the mea...

Page 49: ...nitialized from the controller LON initializ No Yes Service switch LON ne t 78kbps A C EH 485 adapter card LON 100 adapter card Eg Datajamak 2x 2 1 x0 24 A B C RS 485 net EH 105 EH 105 Modbus net MODB...

Page 50: ...ing the EH 485 bus adapter card and a modem can be connected to the RS 485 field bus through the master device EH 686 An EH 485 bus adapter card must be installed in the controller so that the EH 105...

Page 51: ...ssage center number with or button Confirm by pressing Give the SIM card s PIN code The regulator will not initialize the GSM modem before the PIN code is installed The SIM card has to be put in the G...

Page 52: ...n the EH net and the network By using the browser it is possible to communicate with the EH 105 controller from any pc Information from the controller can be read and changed from the pc If desired en...

Page 53: ...pull the cover out of place Detach the keyboard display unit carefully by prying it with a screwdriver Turn the keyboard display unit into the opposite position Press the keyboard display unit carefu...

Page 54: ...0VAC SF AC f converter control 0 10V Cooling control 0 10V Damper control 0 10V HRU control 0 10V Heating control 0 10V 24VAC or damper On Off 24 VAC 24 VAC 51 64 Heating actuator 24 VAC 0 10VDC ctrl...

Page 55: ...U efficiency measurement TMD SF channel exhaust air CO2 content room measurement CO 2 SF filter detector EF filter detector Heating pump running information Supply air unit running information Exhaust...

Page 56: ...on from 1 1 output TMD TMI CONTACTOR CONTROLLED AH UNIT WITH CONTRADICTION ALARMS Room temperature Supply air after HRU HRU efficiency measurement TMR SF fan 1 1 running information PDS NET 24VAC or d...

Page 57: ...rol Neutral wire 230 VAC AH unit running information 230V Control voltage Power supply 230 VAC 50Hz 230V Control voltage Dig 1 Dig 2 Dig 3 Relay 1 N L L 230V N 21 23 25 41 Relay 2 Relay 3 24 VAC 24 Di...

Page 58: ...functions transfer alarms using digital inputs and make an individual regulating circuit EH 686 can also function as a master in the Ouman RS 485 bus by directing traffic in the bus MODBUS 100 MODBUS...

Page 59: ...45 Running time counter 6 Sensor fault 5 16 18 Sequence delay 24 Settings user level 9 Settings maintenance level 24 30 32 34 36 37 SF Ac Freq Converter override 8 45 Smoke alarm 46 Special calendar...

Page 60: ...ces 1 running information 6 pieces 0 10 or 2 10 VDC 1 24VAC DC 1A 2 pieces 230VAC 6 1 A or 24VAC DC 6 1 A resistive load 6A inductive load 1A 1 230VAC 6 1 A 230 VAC control inputs Ouman Oy www ouman f...

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