Systems Controls & Instruments ETN-24-PROG Series Owner's Manual page 7

4.2 List of jumpers are description:
Jumper 1 - 3 pins - External sensor operation. SEE # 4.3
Jumper 2 - 2 pins - See below table.
Jumper 3 - 2 pins - See below table.
Jumper 4 - 3 pins - NOT IN USE .
Jumper 5 - 2 pins - External sensor operation. SEE # 4.3
Jumper 2 and 3 - options
IF you have the SUPER model , make sure that you select the correct configuration needed :
Jumpers \ Function HP - Active in Cool "O"
Jumper 2
Jumper 3
* - Factory default. (Default open with the plastic cover on ONE pin)
HP - Heat pump mode
HC - Heat / Cool mode.
Fan mode "electric", fan will be activated or not, depending on the position of the button "AUTO FAN."
Fan mode "oil/gas", this option is used when the heating system is different from the A/C unit. (i.e., furnace)
In this option the fan will work:
- FAN ON position: the fan will work continuously.
- AUTO FAN position: the fan WILL NOT WORK continuously.
4.3 External sensor connection - option
IMPORTANT - THE EXTERNAL SENSOR MUST BE SCI TYPE
N.TC. Sensor; Temperature ~ Resistance Characteristics
Temp ° ° ° ° C
7.2
Temp ° ° ° ° F
45
Res. k 115.8 100.9 88.1 77.1 67.7 59.6 52.5 46.4 41.2 36.6
The default from factory is INTERNAL SENSOR.
- 4.3.1. Disconnect power to the thermostat 24 Vac.
- 4.3.2 Place jumper 1 in "B" position. (see # 3)
- 4.3.3 Remove jumper 5. OPEN . (see # 3)
- 4.3.4 Connect external sensor to terminals T - T .
- 4.3.5 Reconnect power to the thermostat.
The length of the cable for the external sensor is 100 feet (30 meters) with standard cable.
If longer distance is needed then the cable MUST be shielded.
There is a wide range of sensors for different applications, duct, rooms, etc.
There is also option for averaging the temperature. For details please contact our technical line
or visit our web site, see details at the end of this manual.
File: ETN-24-PROG book - page letter
SHORT
OPEN
10.0 12.8 15.6 18.3 21.1 23.9 26.7 29.4 32.2
50 55 60 65
Rev: 1
Pipersville, PA 18947 USA
Phone: 215-766 1487 Fax: 215-766 1493
Email: info@scillc.com - www.scillc.com
HP - Active in Heat "B"
OPEN
OPEN
70 75 80 85
- 5 -
HC-Electric HC-Oil/Gas
OPEN* SHORT
SHORT* SHORT
90
Date: 24-06-2002