3
Issue 2.0
Installation
1. IMPORTANT
: ensure all electrical connections are isolated before commencing any work on the
unit.
2. Unscrew the 4 security screws using MS Electronics tamperproof screwdriver MSD-152 to
remove the front cover.
3.
Mount the unit securely using any suitable fixing in conjunction with the mounting holes
provided in the unit.
4. Connect the wiring as shown in the diagram (or any suitably appropriate form) using the
convenient pluggable terminal blocks provided. Make sure to choose the correct output
terminals that are suitable to your application (their operation is described in the ‘Product Wiring’
section).
5. On the remote sensor version, 2-core screened cable should be used to connect the remote
sensor to the thermostat. The screen should be connected to the earth terminal ONLY (do not
connect the screen to anything at the remote sensor end).
6. Adjust the internal controls to suit the installation operational requirements (see below).
7. Replace the cover securely using the 4 security screws.
Operation
1. IMPORTANT
: ensure all electrical connections are isolated before commencing any work on the
unit.
2. Adjust the “Setpoint” dial to the relative humidity level the room is to be regulated to.
3. Set the “Differential” to the total relative humidity swing either side of the “Setpoint” that the
room humidity is required to keep within.
4. Set the “Off Timeout” dial to the number of hours that humidity control can be disabled for
before it is automatically re-enabled.
5. Example of a typical set-up:
Setpoint set to 55% RH
Differential set to 4% RH
Off Timeout” set to 10 hours
In the
ON
mode the unit will maintain the humidity between 53% RH and 57% RH.
The unit will permanently maintain this control unless it is switched
OFF
via the pushbutton.
After 10 hours in the
OFF
mode the E914 will automatically revert back to the
ON
mode.
Technical Specification
Power supply:
22 - 26V AC (50 - 60Hz) or DC (plus earth)
Output switch rating:
16A, 250V AC 50Hz (resistive)
Output switch type:
Changeover relay (volt-free)
Humidity control:
5% RH to 95% RH
Humidity differential:
1% RH to 10% RH
Sensor accuracy:
+/- 3% RH
Sensor drift:
+/- 1.2% RH over 5 years (no calibration
required)
Guarantee:
5 Years
Weight:
0.33Kg
Dimensions:
120mm x 95mm x 35mm
