EPH CONTROLS RDT Recessed Room Thermostat Installation Guide

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RDT  

Recessed Room Thermostat  

Installation and Operation Guide  

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General	Details
Name	EPH CONTROLS RDT Recessed Room Thermostat Installation Guide
Make	EPH CONTROLS
Language	English
Filetype	PDF (Download)
File size	0.57 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• EPH CONTROLS

EPH CONTROLS RDT Recessed Room Thermostat Installation Guide Overview

Summary of Contents

• Page 1: Recessed room thermostat Installation and operation guide
• Page 2: Installation instructions Factory default settings Specifications LCD display Buttons Wiring Mounting & installation Operating instructions On/off function & adjusting the target temperature Locking the keypad / backlight
• Page 3: Mains operated non-programmable room thermostat with setback. Installation instructions.
• Page 4: Factory default settings include high and low temperature limitations. Keypad lock options are available. Operating mode can be adjusted. Temperature indicator displays current conditions. Frost protection settings are configurable. Setback temperature can be set for energy savings. HYS On and HYS Off settings are available. Normal operating conditions are indicated in degrees Celsius. Specific temperature thresholds are defined for various functions. RDT may refer to a specific operational mode or setting.
• Page 5: Specifications Power supply / Input: 230VAC Power consumption: <1W Temperature range: 5…35˚C Ambient temperature: 0…45˚C Ambient admissible humidity: 5-95%RH Contact rating: 10(3)A 230VAC Switch output: SPDT Volt Free Dimensions: 95 x 95 x 40mm Internal temperature sensor: NTC 100K Hysteresis (Switching differential): Adjustable from 0 to 1°C
• Page 6: LCD display shows various statuses and settings. It displays when setting target temperature. It shows the current room temperature. It indicates current and target temperature. It displays when changing mode setting. It shows when setting TPI mode. It indicates when the keypad is locked. It displays when the thermostat is calling for heat. It shows when the thermostat is in the OFF mode. It indicates when setting high and low temperature limits. It displays during calibration mode. It shows when setting hysteresis. It indicates when setback mode is enabled.
• Page 7: Standby button OK button Down button Up button
• Page 8: Wiring 230V on Terminal 4: Thermostat works in Normal mode 0V on Terminal 4: Thermostat works in Setback mode If mains output is required terminals L and 3 must be electrically linked. Terminal Connections Live In Neutral In Normally closed connection Normally open connection Common connection Setback connection
• Page 9: Mounting & installation Installation and connection should only be carried out by a qualified person. Only qualified electricians or authorised service staff are permitted to open the thermostat. If the thermostat is used in a way not specified 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 first disconnected from the mains. This thermostat can be mounted to a recessed conduit box.
• Page 10: Mounting & installation Remove the thermostat from its packaging. Choose a mounting location so that the thermostat can measure the room temperature as accurately as possible. Mount the thermostat 1.5 meters above the floor level. Prevent direct exposure to sunlight or other heating/cooling sources. Use the fastening clip on the base of the thermostat to release the front housing from the rear wiring box. Wire the thermostat according to the wiring diagram. Screw the rear wiring box to the recessed back box. Attach the front housing to the rear wiring box until it clips securely into place.
• Page 11: Page 11
• Page 12: Mains operated non-programmable room thermostat with setback operating instructions.
• Page 13: On/Off function allows you to turn the thermostat on or off. In ON mode, the thermostat displays the current room temperature. In OFF mode, the thermostat displays the current room temperature and the word 'OFF'. You can adjust the target temperature from 5-35˚C. Press to increase the target temperature. Press to decrease the target temperature. The target temperature is saved after pressing or waiting 5 seconds.
• Page 14: Locking the keypad To lock the thermostat, press and hold specific buttons for 10 seconds. The buttons are now disabled. To unlock the thermostat, press and hold specific buttons for 10 seconds. The buttons are now enabled. Backlight There are three settings for selection: AUTO, ON, and OFF. The backlight is on for 10 seconds when any button is pressed. The backlight is permanently on. The backlight is permanently off. To adjust the backlight setting, press and hold specific buttons for 10 seconds. Use specific buttons to change the mode between AUTO, ON, and OFF. Press a specific button to confirm selection and return to normal operation.
• Page 15: Menu function allows the user to adjust additional functions. To access the menu, press and hold specific buttons together for 5 seconds. Operating mode options include Normal, Delay Start, or TPI mode. The default setting is Normal. Press and hold specific buttons together for 5 seconds to access the operating mode. ‘PO1’ will appear on the screen for mode selection. Use designated buttons to select between Normal mode, Delay Start mode, and Time proportional integral mode. Press a specific button to confirm the selected mode.
• Page 16: Operating mode continued Normal mode When the temperature falls below the target temperature, the thermostat will activate the demand for heat. When the temperature rises above the target temperature, the thermostat will cancel the demand for heat. Graph (14.1): On / Off control Target temperature: 21˚C
• Page 17: Delay Start Control (On/Off) When in this mode, the thermostat is delayed by a variable time depending on the current temperature, target temperature, and the fall in temperature from when the delay start has activated. The indicator will flash until the thermostat activates. When activated, the thermostat will allow the heating system time to reach the target, and delay start will remain inactive until it reaches this target. If the temperature is 6˚C below the thermostat target, the thermostat will call for heat immediately. If the temperature is 2˚C below the target, the thermostat will not call for heat for 32 minutes.
• Page 18: Operating mode Delay start control (On/Off) Delay start can be reactivated by pressing buttons to adjust the target temperature. The heating will be delayed as per the graph on page 15. If the difference between the actual temperature and the target is 1°C, the thermostat will delay starting for circa 40 minutes. If the difference is 3°C, the thermostat will delay starting for circa 24 minutes. If the difference is 6°C or more, the thermostat will be switched on immediately. The time delay will change if the temperature drops from the original calculation.
• Page 19: Time Proportional Integral Mode (TPI) When the thermostat is in TPI mode and the temperature is rising in the zone and falls into the Proportional Bandwidth section, TPI will start to affect the thermostat's operation. The thermostat will turn on and off as it gains heat so that it doesn’t overshoot the target by too much. It will also turn on if the temperature is falling so it doesn’t undershoot the target which will leave the user with a more comfortable level of heat. There are 2 settings that will affect the thermostat's operation: the number of heating cycles per hour and the Proportional Bandwidth. CyC – Number of Heating Cycles per hour This value will decide how often the thermostat will cycle the heating on and off when trying to achieve the target temperature. You can select 2/3/6 or 12.
• Page 20: Operating mode Time proportional integral mode (TPI) Pb - Proportional bandwidth This value refers to the temperature below the target at which the thermostat will start to operate in TPI control. You can set this temperature from 1.5°C to 3.0°C in 0.1°C increments. Graph (18.1): TPI control Target temperature Proportional bandwidth Heating on Heating off
• Page 21: Once TPI mode is selected, ‘CYC’ and ‘06’ will appear on the screen. Use the controls to select from 2, 3, 6 or 12. Press to confirm. ‘P Band’ and ‘2.0’ will appear on the screen. Use the controls to select from 1.5 to 3.0. Press to confirm. Press to return to normal operation.
• Page 22: Setting high and low limits allows the installer to change the minimum and maximum temperatures that the thermostat can be set at. To access this setting, press and hold the appropriate buttons together for 5 seconds. ‘P01’ will appear on the screen. Use the buttons to select until ‘P02’ appears on the screen. Press to select ‘ON’. ‘HIGH LIMIT’ will appear on the screen, and the temperature will begin to flash. Use the buttons to select the high limit for the thermostat. Press to confirm. ‘LOW LIMIT’ will appear on the screen, and the temperature will begin to flash. Press to return to normal operation.
• Page 23: Hysteresis HOn & HOFF This menu allows the installer to change the switching differential of the thermostat when the temperature is rising and falling. If ‘HYS ON’ is set at 0.4˚C and the setpoint is 20˚C, then the thermostat will switch on when the temperature drops below 19.6˚C. If ‘HYS OFF’ is set at 0.2˚C and the setpoint is 20˚C, then the thermostat will switch off when the temperature reaches 20.2˚C. To access this setting press and hold buttons together for 5 seconds. ‘P01’ will appear on the screen. Press until ‘P03’ appears on the screen. Press to confirm. ‘HYS’ & ‘ON’ will appear on the screen, press to select the ‘HOn’ temperature. ‘HOFF’ temperature will begin to flash. Press to confirm.
• Page 24: Hysteresis HOn & HOFF Use & to select the ‘HOFF’ temperature. Press to confirm. Press to return to normal operation. Calibrate This menu allows the installer to calibrate the temperature of the thermostat. To access this setting press and hold & together for 5 seconds. ‘P01’ will appear on the screen. Press until ‘P04’ appears on the screen. ‘CALIBRATE’ and the actual temperature will appear on the screen. Press & to calibrate the temperature. Press to confirm. Press to return to normal operation.
• Page 25: Setback mode can be used with a Programmer / Timeswitch. When terminal 4 has 0V, the thermostat operates in setback mode. The setback is factory set to 0˚C and must be adjusted from 1˚C to 10˚C. To access the setback setting, press and hold specific buttons for 5 seconds. Select 'P05' to adjust the setback temperature. The setback temperature will flash on the screen for adjustment. Confirm the new setback temperature to enable the function. When setback mode is active, 'SB' will appear on the screen. Refer to page 6 of the guide for detailed instructions on using setback mode. Adjusting the setback temperature reduces the setpoint accordingly.
• Page 26: Frost protection can be enabled or disabled on the thermostat. When activated, the thermostat will call for heat at 5˚C. To access the frost protection setting, press and hold two buttons for 5 seconds. The display will show 'P01' when accessing the setting. Navigate to 'FP' to adjust frost protection settings. 'ON' will flash on the screen when selecting frost protection. Use the buttons to toggle frost protection 'ON' or 'OFF'. Press a button to confirm the selection. Return to normal operation after confirming the setting.
• Page 27: Resetting the thermostat to factory settings involves pressing and holding specific buttons together for 5 seconds. The display will show 'P01'. You need to navigate to 'RST' on the screen. 'NO' will flash, and you must press to select 'YES' to confirm the reset. The thermostat will restart and revert to its factory defined settings.
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