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H

7990

 series 

Touch Pad fan coil unit thermostats are designed to control the room

 

temperature in air-conditioning fan coil unit system or dust pipe channel system.

 H

7990  

series thermostats with microprocessor and big LCD display. It shows the following items: 

working  status (cool,  heat  or  ventilation),  fan  speed,  room  temperature,  set-point 

temperature  etc.  Keys  include  on/off  (

 

),mode  (

 

),fan  speed  (

 

) and  temperature 

adjustment ( 

 

 ). 

BASIC FEATURES     

 Room temperature setting 

 Manual or auto 3-speed changeover 

 Defrost (low temperature protection) 

 Clock, Timer ( -T, Option ) 

 Clock ,7 days programmable ( -T74, Option ) 

 Blue back light ( -L, Option ) 

 Keypad Lock (Option ) 

 Auto Restart ( Option ) 

STATUS DISPLAY 

 Working Status: Cooling 

, Heating

  or Ventilation 

 Fan Speeds: low

    

,

 

Mid

,High

or Auto 

 FCU valve status 

 Room temperature display 

 Temperature setting display 

 Clock ,week display 

SPECIFICATIONS 

 Sensing element: 

 

           

NTC 

 Control Accuracy:

     

                            

 

1

 

 Set-point range:           

       

5

 to 35

 

 Display range: 

  

 0

55

 

 Operation environment: 

       

0

45

 

 Operating Humidity:   

           

5

90%RH (non-condensing) 

 Key: 

                                       

 Touch screen key+ soft touch key 

 Power Consumption : 

           

 1W 

 Power supply: 

                     

AC 85

260V, 50/60Hz 

 Display Accuracy:   

              

 0.5

 

Wirings: 

                                

Accepting 2 ×  1.5 mm

2

 or 1 x 2.5mm

2

 wires

 

 

Switch current rating: 

           

Resistive: 2 A, Inductive: 1 A  

Housing: 

                               

PC + ABS Flame Retardant 

 Dimensions: 

                        

90 ×  90 ×  14.5 mm ( W ×  H ×  D )  

Hole pitch: 

                            

60 mm ( Standard ) 

 Protection Class: 

                  

IP30 

H7

990

 Series Touch Pad Thermostat

Data sheet for H

7990

, Issue 0916

HERZ Armaturen Gws.m.b.H

Richard-Strauss-Strasse 22,1230 Vienna, Austria.

1

Summary of Contents for H7990 Series

Page 1: ...uto Restart Option STATUS DISPLAY Working Status Cooling Heating or Ventilation Fan Speeds low Mid High or Auto FCU valve status Room temperature display Temperature setting display Clock week display SPECIFICATIONS Sensing element NTC Control Accuracy 1 Set point range 5 to 35 Display range 0 55 Operation environment 0 45 Operating Humidity 5 90 RH non condensing Key Touch screen key soft touch k...

Page 2: ...When the room temperature is lower than set point the heating valve will be opened Otherwise it will be closed Cooling valve is always closed CLOCK CALIBRATION T T74 Press M with four seconds till to display hh mm and hh flash press or to adjust hour press M mm flash press or to adjust minute Press M week flash press or to adjust Mon to Sun TIMER FUNCTION SETTING T Timer on off function Turn on or...

Page 3: ...tion Turn off When the room temperature is lower than 5 the thermostat would automatically turn on the fan and valve with showing When the room temperature reaches to 7 the thermostat will automatically close the output Low Temperature Protection Setting Turn off press and hold for 3 seconds it will display OF or ON press or button to adjust the parameter OF indicates low temperature protection in...

Page 4: ...o the back panel in the wall then fix it with the two screws in the packing box 5 Put the cover with 30 degree angle then fix the up two clips 6 Push the places of the two down clips fix the cover and finish the installation Med Low H7990 25 L N Val Fan Valve AC85 260V 50 60Hz N L Hi Low H7990 27 L N VO Med Fan Valve VC AC85 260V 50 60Hz N L Hi Val2 Low H7990 26 L Cooling N Med Fan Val1 4 pipe L C...

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