meitav-tec ETN24-P-3S-HU User manual

ETN24-P-3S-HU
(Cool and Heat)
Owner's Manual - Installation
and Operating Instructions
Meitav-tec Ltd (Contel group)
Tel: [phone] Fax: [phone]
www.meitavtec.com - su
pp
ort
@
meitavtec.com

2
Please read this manual carefully before installation and use.
Index
Options & Accessories 1
Installation Instructions 2
Wiring Connections 3
DIP switch Configuration 4
External Sensor Connection 5
Technician Settings 6
Operating Manual 7

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1. Options and Accessories
Remote sensor option:
•TS01: Temperature Sensor with 80cm cable.
•RS01: for remote temperature sensing (1 required); for
averaging temperature at 4 locations (4 required) - the
thermostat will control on the average temperature of all 4
locations
•RS02: for averaging temperature at 2 locations (2 required) -
the thermostat will control on the average temperature of both
locations
Humidity Duct Sensor (Purchase separately)
•GHU/DUCT: Humidity duct sensor
For details on where to purchase accessories, please contact Meitav-tec for you’re
nearest location or visit our web site at www.meitavtec.com

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2. Installation Instructions
Separate the front panel from back panel by depressing the
tongue located in the top of the unit.
Pull the back panel out.
Line the back panel up against the wall or flat surface. Install
three screws as required.
Make electrical connections as shown on enclosed electrical
wiring diagram. (Next page) Verify that you have 24Vac
between terminals C and R.
Install the cover to the back panel; first the two tabs on the
bottom and then the top tongue.
Push until tight against the wall. Wait for 15 seconds for the LCD
display to appear (completion of power circuit charging and for
self-diagnostics).
Mod
e
Fan
Cool ON
o
C
On/Of
f

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3. Wiring Connections
Low Medium High
External sensor (option) Humidity Sensor Cool Output 0-10Vdc Heat Output 0-10Vdc Main Input 24VAC
4. DIP switch Configuration
DIP switch S1 (3 switches) - Internal / External sensor
Internal sensor: S1.1 - On S1.2 - Off S1.3 - On
External sensor: S1.1 - On S1.2 - On S1.3 - Off
DIP switch S2 (4 switches) - Not in use
Default position: S2.1 - Off S2.2 - Off S2.3 - Off S2.4 - Off

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5. External sensor connection
N.TC. Sensor; Temperature - Resistance Characteristics
Temp °C7.2 10.0 12.8 15.6 18.3 21.1 23.9 26.7 29.4 32.2
Temp °F 45 50 55 60 65 70 75 80 85 90
Res. k 115.8 100.9 88.1 77.1 67.7 59.6 52.5 46.4 41.2 36.6
- Disconnect power to the thermostat 24Vac.
- Connect external sensor to terminals T - 0.
- Reconnect power to the thermostat.
The length of the cable for the external sensor is 30 meters with standard cable.
If longer distance is needed then the cable MUST be shielded.

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ON
oC
On/Off Mode Fan
OFF
Hi
Me
Lo
Cool ON
oC
On/Off Mode Fan
OFF
Hi
Me
Lo
Cool
oC
On/Off Mode Fan
oC
On/Off Mode Fan
Set Set
ON
oC
On/Off Mode Fan
Hi
Me
Lo
Cool
oC
On/Off Mode Fa n
6. Technician Settings
Set differential for valve 2°C…10°C, proportional output range 0-10Vdc or
2-10Vdc, ambient humidity (RH) indication, set point for humidity (set RH) and
differential for proportional output 4%-20% RH.
Note: If no key is pressed for 5 seconds - the thermostat will automatically return to
normal display mode.
Enter settings.
•Set temperature to 10°C.
•Press and hold the Mode button (5 seconds) to enter
settings - a number (range 2-10) will flash on the display.
Set differential for 0-10Vdc.
The temperature Differential defines the ratio between the
opening level of the valve and the temperature demand. The
valve will be fully opened when the demand (demand =
ambient temp - set temp) equals the differential.
(Differential range: 2°C…10°C)
•Press the Mode button again - a number will appear on the
display.
•Adjust the differential using the (+) or (-) buttons.

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ON
oC
On/Off Mode Fan
OFF
Hi
Me
Lo
Cool ON
oC
On/Off Mode Fan
OFF
Hi
Me
Lo
Cool
oC
On/Off Mode Fan
oC
On/Off Mode Fan
On/Off Mode Fan On/Off Mo de Fan
%HU
On/Off Mode Fan
Proportional output range
0-10Vdc or 2-10Vdc
•Press the Mode button again - a number will appear on the
display.
•Using the (+) button, change the scale to 2-10Vdc “2” will
appear on the display.
•Using the (-) button, change the scale to 0-10Vdc “0” will
appear on the display.
Ambient humidity (%RH).
•Press the Mode button again - the current ambient humidity and “HU%” will
appear on the display.

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ON
oC
On/Off Mode Fan
Hi
Me
Lo
Cool
%HU
On/Off Mode Fan
SET
%HU
On/Off Mode Fan
SET
%HU
On/Off Mode Fan
%HU
On/Off Mode Fan
Humidity set point (40%-70% RH)
•Press the Mode button again - the Humidity set-point,
“%HU” and “SET” will appear on the display (“SET” will
blink).
•Adjust the humidity set point using the (+) or (-) buttons.
Differential for proportional output 4%-20% RH.
The humidity Differential defines the ratio between the
opening level of the valve and the humidity demand. The
valve will be fully opened when the demand (demand =
ambient humidity - set humidity) equals the differential. The
proportional output is active in cooling mode only!
(Differential range: 4%…20% RH)
•Press the Mode button again - the differential for
proportional output will appear on the display.
•Adjust the differential using the (+) or (-) buttons.
•Press the Mode button again to return to normal display
mode.

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7. Operating manual
7.1 On/Off button
•Press the On/Off button to activate or deactivate the
thermostat - The word "ON" or “OFF” will appear on the
display.
7.2 Temperature set-point adjustment
•Press the (+) or (-) buttons - the set-point temperature will
flash and “COOL” and “SET” will appear on display.
•Adjust the cooling set-point temperature using the (+) or (-)
buttons.
ON
oC
On/Off Mode Fan
oC
On/Off Mode Fan
OFF
oC
On/Off Mode Fan
Cool
oC
On/Off Mode Fan
Cool
Set Set

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7.3 Modes
•Press the Mode button to switch between:
Cool - “Cool” will appear on the display.
Heat - “Heat” will appear on the display.
Auto Change-over - “Cool” and “Heat” will appear on the
display.
In Auto change-over mode the active mode will flash.
Fan Only - “Fan” will appear on the display.
7.4 Fan Speeds
•Press the Fan button to switch between the fan speeds.
High speed - “Hi” will appear on display.
Medium speed - “Me” will appear on display.
Low speed - “Lo” will appear on display.
Auto speed - “Hi”,”Me”,”Lo” will appear on display.
In Auto Speed - the active speed will flash.
ON
oC
On/Off Mode Fan
OFF
Hi
oC
On/Off Mode Fan
Me
oC
On/Off Mode Fan
Lo
oC
On/Off Mode Fan
Hi
Me
Lo
oC
On/Off Mode Fan
Cool
oC
On/Off Mode Fan
Fan
oC
On/Off Mode Fan
Cool
oC
On/Off Mode Fan
Heat
Heat

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7.5 Auto Fan
The Auto Fan mode is available in all modes except for Fan
Only mode
•Press and hold (5 seconds) the Fan button to select Auto
Fan - “Auto Fan” will appear on display.
In Auto Fan mode - the fan will run only during demand for
cooling.
•Press and hold the fan button again to cancel the Auto Fan mode.
oC
On/Off Mode Fan
Cool
oC
On/Off Mode Fan
Cool
Auto Fan