EPH CONTROLS CRTP2 Battery Operated Programmable Instruction Manual

CONTROLS CRTP2 Battery Operated Programmable
Instruction Manual CRTP2 Room Thermostat Battery Operated
Operating Instructions

CRTP2 Battery Operated Programmable

Contents

1. Factory default settings
2. Specification & wiring
3. Mounting
4. Installation
5. Wiring diagram
6. Frost protection
7. Button / symbol description
8. Resetting the thermostat
9. Keypad lock and unlock
10. Setting the date, time and operating mode
11. Factory default program settings
12. Adjusting the program settings for 5/2d
13. Temporary override (Manual)
14. Permanent override (Hold)
15. Adjusting the switching differential
16. Replacing the batteries
17. Installer Menu

Prior to setting the thermostat it is necessary to complete all required settings described in this section.

1. Factory default settings****
   Contacts:| Volt Free
   ---|---
   Temperature indicator:| °C
   Switching differential:| 0.4°C
   In built frost protection:| 5°C
   High and Low temp.| Off
   limitation: Clock:| 24 hours
   Keypad lock:| Off

2. Specifications & wiring****
   Power supply:| 2 x AA Alkaline Battery
   ---|---
   Power consumption:| 8 VA
   Temp. control range:| 5 … 35°C
   Ambient temperature:| 0 … 50°C
   Contact rating:| 8A 230Vac
   Dimensions:| 84 x 84 x 30mm
   Temperature sensor:| NTC 10K Ohm @ 25°C
   Switching differential:| Adjustable from 0.210.4/0.610.8/1.0°C
   Frost protection:| Only operational in stand by mode th

3. Mounting
   The mounting height should be 1.5 meters above the floor level. The thermostat should be wall mounted in the room where the heating is to be controlled. The place of installation should be chosen so that the sensor can measure the room temperature as accurately as possible. Choose the mounting location to prevent direct exposure to sunlight or other heating / cooling sources when mounted.
   The unit can be fitted to:
   1. Recessed conduit boxes
   2. Surface mounting boxes
   3. Directly on walls.

4. 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 3.
   Wire the thermostat according to the wiring diagram. Close the thermostat and tighten the fastening screw.

5. Wiring diagram
   INTERNAL WIRING DIAGRAM CRTP2
   If mains voltage output is required, 230V must be connected to terminal 2.

6. Frost protection
   Frost protection is built into this thermostat, it is pre fixed at 5°C and is not adjustable. It will only be activated when the thermostat is in the stand by mode and the room temperature reaches 5°C.

7. Button / Symbol description
   

8. It is necessary to reset the thermostat prior to initial programming.
   Press the RESET button on the side of the thermostat.
   ‘NO’ will appear on the screen.
   Press the button.
   ‘YES’ will appear on the screen.
   Press the ‘OK’ button to return to normal operation.

9. Keypad lock and unlock OFF
   To lock the keypad, press and hold the and buttons for 10 seconds.
   will appear on the screen. The keypad is now locked.
   To unlock the keypad, press and hold the and buttons for 10 seconds.
   will disappear from the screen. The keypad is now unlocked.

10. Setting the date, time and operating mode
    Press the button once. ‘Set Date Year’ will appear on the screen.
    Press the or buttons to adjust the year. Press the ‘OK’ button.
    Press the or buttons to adjust the month. Press the ‘OK’ button.
    Press the or buttons to adjust the day. Press the ‘OK’ button.
    Press the button or wait 10 seconds and the thermostat will return to normal operation.

Factory program setting

| 5/2D
---|---
P1| P2| P3| P4| P5| P6
Mon Fri| 6:30| 8:00| 12:00| 14:00| 17:30| 22:00
21°C| 18°C| 21°C| 18°C| 21°C| 16°C
Sat-Sun| 8:00| 10:00| 12:00| 14:00| 17:30| 23:00
21°C| 18°C| 21°C| 18°C| 21°C| 16°C
| | | | | |
| 7D
P1| P2| P3| P4| PS| P6
Mon-Fri| 6:30| 8:00| 12:00| 14:00| 17:30| 22:00
21°C| 18°C| 21’C| 18°C| 21°C| 16’C
Sat-Sun| 8:00| 10:00| 12:00| 14:00| 17:30| 23:00
21°C| 18°C| 21°C| 18°C| 21’C| 16°C
| | | | | |
Everyday| 24H
P1| P2| P3| P4| P5| P6
6:30| 8:00| 12:00| 14:00| 17:30| 22:00
21°C| 18°C| 21°C| 18°C| 21°C| 16°C

Replacing the batteries

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.
Replace the batteries with 2 x AA Alkaline batteries.
Close the thermostat and tighten the fastening screw.

Installer menu
To access the installer menu, you must hold OK and for 5 seconds.
When in the installer menu, press or and OK to navigate and select.

Normal Mode (Nor)
When the thermostat is in Normal mode, the thermostat will try to reach the target temperature after the program changes.
Example: Program 1 on the thermostat is 21°C for 06:30am and the room temperature is 18°C. The thermostat will start the heating at 06:30am and the room temperature  will start to increase then.
To return to main menu, press OK to select Nor
Optimum Start Mode (OS) Boiler Plus
When the thermostat is in Optimum Start mode, the thermostat will try to reach the target temperature by the start time of the next switching time.
This is done by setting the Ti (time interval) on the thermostat in this menu to 10, 15 or 20. This will allow the thermostat 10 mins, 15 mins or 20 mins to increase the room  temperature by 1°C.

Ti can be set when OS is selected in the installer menu.
To return to main menu, press OK to select required Ti
To achieve the target temperature when the program starts, the thermostat will read:

1. The Room Temperature (RT)
2. The Setpoint Temperature (ST)
3. The Target Temperature Difference (TTD) is the difference between the setpoint temperature and the room temperature . 20˚C
   The time (in minutes) that it will take to overcome (TTD) is called Optimum Start Time (OST) and its maximum value is 3 hours = 180 mins. This is subtracted from the start time.
   As the temperature increases the thermostat will recalculate the OST if the temperature is increasing too quickly.

Example when Ti = 20
Program 1 on the thermostat is 21°C for 06:30am and the room temperature is 18°C.
The thermostat will start the heating at 05:30am to reach 21°C for 06:30am @ Ti=20.

Example when Ti = 10
Program 1 on the thermostat is 21°C for 06:30am and the room temperature is 18°C.
The thermostat will start the heating at 06:00am to reach 21°C for 06:30am @ Ti=10.

EPH Controls Ireland
technical@ephcontrols.com www.ephcontrols.com 
EPH Controls UK
technical@ephcontrols.co.uk www.ephcontrols.co.uk

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