EPH Controls CDC2 Operating instructions

Installation and Operation Guide
Cylinder / Room Thermostat
CDC2

2
Factory Default Settings
3
Specications
4
LCD Display
5
Buttons
6
Wiring
7
10
Mounting & Installation
Mounting of Temperature Sensor
15
Locking the Keypad / Backlight
16
Menu Function
22
14
On / O Function & Adjusting the Target Temperature
18
25
Table of contents
20
26
27
23
17
Installation Instructions
Operating Instructions
Delay Start Control (On/O))
P03 HYS Hysteresis HOn and HOFF
Normal Mode (Nor)
Time Proportional Integral Mode (TPI)
P02 Setting High and Low Limits
P01 Operating Mode
P04 Calibrate
P05 Temperature Range Selection
Resetting the Thermostat
13
Quick introduction to your CDC2 Thermostat

Mains operated non-programmable
Cylinder / Room Thermostat
Installation Instructions

2CDC2
Factory Default Settings
High and Low Temp. limitation: O
Keypad lock: O
Operating mode: Normal
Temperature indicator: ˚C
Frost protection: On (5˚C)
HYS On: 5˚C
HYS OFF: 0˚C
Temperature selection range: CyL (Hot Water Parameters)
Temperature sensor: Connected
Note:
Frost protection is built into this thermostat.
It will only be activated when the thermostat is in OFF position and the temperature reaches 5˚C.

3
EPH Controls Ltd.
Specications
Contacts: Volt Free
Power supply / Input: 230VAC
Power consumption: 1.5W
Ambient temperature: 0 … 45˚C
Ambient admissible humidity: 5-95%RH
Contact rating: 10(3)A 230VAC
Dimensions: 91 x 91 x 26mm
External Temperature sensor: NTC 10K
Backlight: White
IP rating: IP20
Pollution degree: 2
Automatic action: 1C
Temperature range: Hot Water 5 … 90˚C
Heating 5 … 35˚C
Hysteresis (Switching dierential):
Hot Water 0 … 20°C (0.5°C increments)
Heating 0 … 1°C (0.1°C increments)

4CDC2
[3]
[1]
[11] [10] [9]
[12]
[5]
[4] [6][2]
[7]
[8]
mode cyc p bandset room temp
HYS
calibrate high low limit off
[1] Displays when setting target temperature.
[2&3] Displays when heating mode is active.
[3] Displays when cylinder mode is active.
[4] Displays current / target temperature.
[5] Displays when changing mode settings.
[6] Displays when changing TPI mode settings.
[7] Displays when the thermostat is calling for heat.
[8] Displays when keypad is locked.
[9] Displays when thermostat is in the OFF mode.
[10] Displays when setting HIGH and LOW temperature limit.
[11] Displays during calibration mode.
[12] Displays when setting hysteresis.
LCD Display

5
EPH Controls Ltd.
Buttons
OK Button
Down Button Up Button
Reset Button
Standby Button

6CDC2
Wiring
OFF L N
ON
321
COM
Terminal Connections
N Neutral
L Live
1 OFF - N/C Normally closed connection
2 COM- Common connection
3 ON - N/O Normally open connection

7
EPH Controls Ltd.
Mounting & Installation
Caution!
Installation and connection should only be carried out by a qualied person.
Only qualied electricians or authorised service sta are permitted to open the
thermostat.
If the thermostat is used in a way not specied by the manufacturer, its safety may be
impaired.
Prior to setting the thermostat, it is necessary to complete all required settings
described in this section.
Before commencing installation, the thermostat must be rst disconnected from the
mains.
This thermostat can be mounted in the following ways:
1) Directly mounted on wall
2) To a recessed conduit box
3) To a surface mounting box

8CDC2
1) Remove the thermostat from its packaging.
2) Choose a mounting location so that the thermostat can
measure the temperature as accurately as possible.
- Mount the thermostat 1.5 metres above the oor level.
- Prevent direct exposure to sunlight or other heating /
cooling sources.
3) Use a philips screwdriver to loosen the screw on the bottom of
the thermostat to open the front housing.
4) Wire the thermostat according to the wiring diagram on page 6.
5) Screw the backplate onto a back box or directly to the surface.
6) Ensure the temperature sensor is free from obstruction. Close
the front housing and tighten the screw on the bottom of
the thermostat.
Mounting & Installation Continued
Note:
For side entry of the temperature sensor, please use breakout provided.