EPH CONTROLS CDC Cylinder Thermostat Hardwired Installation Guide
- June 9, 2024
- EPH CONTROLS
Table of Contents
EPH CONTROLS CDC Cylinder Thermostat Hardwired
Factory default settings
-
Contacts: Volt Free
-
Temperature indicator: °C
-
Switching differential: 0.4°C
-
Blue backlight activated : for 10 secs after any button is pressed
-
Keypad lock: OFF
Specifications & wiring
- Power supply: 230Vac ±10%
- Power consumption: 5 mVA
- Temp. control range: 10 … 90°C
- Ambient temperature: 0 … 50°C
- Contact rating: 16(3)A
- Dimensions: 84 x 84 x 30mm
- Temperature sensor: NTC 10K Ohm @ 25°C
- Switching differential: Adjustable from 2-10˚C
- Temperature indication: ˚C
Mounting
A) Mounting of temperature sensor
On Cylinder:
To ensure accurate control of your cylinder, the temperature sensor should be mounted on the bottom 1/3 of the cylinder. It is essential that the sensing element is in direct contact with the cylinder and that there is no insulation between it and the cylinder. 60°C is the temperature level required in order to prevent the build up of legionella bacteria. The temperature sensor can be fixed to the cylinder using the provided cord.
On Pipework:
To ensure accurate control, the temperature sensor should be mounted on the
pipework as tightly as possible. It is essential that the sensing element is
in direct contact with the pipework and that there is no insulation between it
and the pipework.
B) Mounting of thermostat
The thermostat should be mounted in a position that will make reading the
display convenient. If required, the temperature sensor can be lengthened with
a 2 core cable to a maximum of 10 meters without affecting the accuracy.
This will enable the thermostat to be mounted in a location convenient for the
user to read the temperature display. However, it is important that an
identical gauge cable is used. The thermostat can be fitted to:
- Recessed conduit boxes
- Surface mounting boxes
- Directly on walls
Installation
Slacken the fastening screw on the bottom of the thermostat with a philips
head screwdriver.
The thermostat is hinged and can be opened 180 degrees.
Mount the unit as described in section 3b.
Wire the thermostat according to the wiring diagram in section 5. Close the
thermostat and tighten the fastening screw.
Wiring diagram
INTERNAL WIRING DIAGRAM CDC
Button / Symbol description
Operating Instructions
Once power has been applied to the thermostat, press the button.
The actual temperature will appear on the screen.
To adjust the temperature press the button.
Press the and buttons to select the desired temperature setpoint.
To adjust the differential press the button.
Press the and buttons to select the desired temperature differential.
Press the button and the thermostat is ready for operation.
Keypad lock and unlock OFF
To lock the keypad, press and hold the and buttons for 5 seconds.
will appear on the screen. The keypad is now locked.
To unlock the keypad, press and hold the and buttons for 5 seconds.
will disappear from the screen. The keypad is now unlocked.
CAUTION!
Before commencing any work on the electrical connections, you must first
disconnect the thermostat from the mains. None of the 230V connections must be
live until the installation has been completed and the housing is closed. Only
qualified electricians or authorised service staff are permitted to open the
thermostat.
There are parts that may carry mains voltage behind the cover. The thermostat
must not be left unsupervised when open. (Prevent non specialists and
especially children from gaining access to it.)
Important: Keep this document
Customer Support
EPH Controls Ireland
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www.ephcontrols.com
EPH Controls UK
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www.ephcontrols.co.uk