EPH CONTROLS HRT Room Thermostat User Guide

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HRT  

Room Thermostat  

Installation and Operation Guide  

VIEW FULL SCREEN PDF MANUAL

General	Details
Name	EPH CONTROLS HRT Room Thermostat User Guide
Make	EPH CONTROLS
Language	English
Filetype	PDF (Download)
File size	0.61 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• EPH CONTROLS

EPH CONTROLS HRT Room Thermostat User Guide Overview

Summary of Contents

• Page 1: Room thermostat installation and operation guide.
• Page 2: Installation instructions Factory default settings Specifications LCD display Wiring Mounting & installation Replacing the batteries Operating instructions On / Off function & adjusting the target temperature Locking the keypad / backlight
• Page 3: Battery operated non-programmable room thermostat Installation instructions
• Page 4: Factory default settings High and low temp. limitation: Keypad lock: Backlight: Operating mode:
• Page 5: Power supply / Input: 2 x AA Alkaline Batteries Power consumption: Operating <0.05W, Standby <0.2mW Temperature range: 5 … 35˚C, 0 … 45˚C Ambient admissible humidity: 5-95%RH Contact rating: 8(3)A 230Vac Dimensions: 85 x 85 x 36mm Temperature sensor: NTC 100K Backlight: White IP rating: IP20 Switching differential: Adjustable from 0.0 – 1.0°C, 0.1°C increments
• Page 6: LCD display shows the current and target temperature. A symbol is displayed when batteries need to be replaced. If the keypad is locked, the lock symbol is displayed. The flame symbol is displayed when the thermostat is calling for heat. ‘LIM’ is displayed when a high or low temperature limit is set. A symbol is displayed when delay start is enabled.
• Page 7: Buttons include reset, handwheel, button, and standby button.
• Page 8: Wiring Terminal connections N/C normally closed connection Common connection N/O normally open connection
• Page 9: Mounting & installation Installation and connection should only be carried out by a qualified person. Only qualified electricians or authorized 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 in the following ways: directly mounted on wall or 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. To open the front housing, use a Philips screwdriver to loosen the screw on the bottom right of the thermostat. Wire the thermostat according to the wiring diagram on page 6. Screw the backplate onto a back box or directly to the surface. Close the front housing and tighten the screw on the bottom of the thermostat.
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• Page 12: Replacing the batteries is displayed when the batteries need to be replaced. Push in the battery compartment on the bottom of the thermostat to release it. Replace the batteries with 2 x AA Alkaline batteries. Re-insert the battery compartment. Push it until it clicks into place.
• Page 13: Battery operated non-programmable room thermostat Operating instructions
• Page 14: On/Off function Press to turn the thermostat on or off. When in the on mode, the thermostat will display the current ambient temperature. When in the off mode, the thermostat will display the current ambient temperature and the word 'OFF'. Adjusting the target temperature Rotate clockwise to increase the target temperature. Press saved. Rotate anti-clockwise to decrease the target temperature. Press saved.
• Page 15: Locking the keypad requires pressing a specific button for 10 seconds, after which a lock icon will appear on the screen and the buttons will be disabled. To unlock the thermostat, press the same button for 10 seconds until the lock icon disappears and the buttons are enabled again. There are three settings for the backlight: 'bL AUtO', where the backlight is on for 5 seconds when any button is pressed; 'bL OFF', where the backlight is permanently off; and a setting adjustment option that requires pressing a button for 10 seconds. To change the backlight mode between AUTO and OFF, rotate a designated control and confirm the selection to return to normal operation.
• Page 16: Menu function allows the user to adjust additional functions. P0 1 – Operating mode includes Normal, Delay Start, or TPI settings. The default setting is Normal. Press and hold the buttons together for 5 seconds to access the menu. ‘P01 & Nor’ will appear on the screen. Press to select the mode. Rotate to choose between Normal, Delay Start, or TPI mode. Press to confirm the mode. Press to return to normal operation.
• Page 17: Operating mode options include normal, delay start, and TPI. In normal mode, the thermostat activates heat demand when the temperature falls below the target. The thermostat cancels heat demand when the temperature rises above the target. A graph illustrates on/off control with target and actual temperatures over time. The target temperature is set at 21˚C. The temperature range shown includes values from 17˚C to 22˚C. Time intervals are measured in minutes, ranging from 0 to 100. The document includes references to EPH Controls Ltd.
• Page 18: Operating mode includes normal, delay start control, and TPI. When the delay start mode is active, 'dS' will appear continuously on the screen. The thermostat is delayed by a variable time depending on the current temperature and target temperature. The display will flash until the thermostat activates. Once activated, the thermostat allows the heating system time to reach the target. Delay start remains inactive until the target temperature is reached. 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. Graph (16.1) illustrates delay start control. Temperature below thermostat setting is measured in °C.
• Page 19: Delay start can be reactivated by lowering the target below the current temperature. Press to confirm the new target temperature. The heating will be delayed as per the graph on page 16. 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, then the thermostat will be switched on immediately. The time delay will change if the temperature drops from the original calculation.
• Page 20: Operating mode options include normal, delay start, and TPI. TPI mode affects thermostat operation when the temperature is rising and falls into the proportional bandwidth section. The thermostat will turn on and off to avoid overshooting the target temperature. It will also activate if the temperature is falling to prevent undershooting the target. This results in a more comfortable level of heat for the user. Two settings influence the thermostat's operation: the number of heating cycles per hour and the proportional bandwidth. The number of heating cycles per hour can be set to 2, 3, 6, or 12. This setting determines how often the thermostat cycles the heating on and off to reach the target temperature.
• Page 21: Proportional bandwidth 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 (19.1) illustrates TPI control with target and actual temperatures over time. Target temperature is set at 22˚C, while the thermostat operates at 21˚C and below. The graph shows the heating on and off cycles in relation to time. Heating on and off states are indicated in the graph. The time intervals in the graph range from 0 to 100 minutes. The proportional bandwidth affects the heating response of the system. The thermostat's operation is influenced by the set proportional bandwidth. The document includes a visual representation of temperature control dynamics.
• Page 22: Setting high & low limits allows the installer to change the minimum and maximum temperatures for the thermostat. To access this setting, press and hold specific buttons together for 5 seconds. 'P01 & Nor' will appear on the screen. Rotate clockwise to see 'P02 & HI LO'. Press select to view 'OFF' & 'LIM'. Rotate to select 'ON' and press to confirm. 'Hi LIM' will appear on the screen, allowing selection of the high limit. Press to confirm the high limit selection. 'Lo LIM' will appear next, allowing selection of the low limit. Press to confirm the low limit selection, and the settings will be saved.
• 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. To access this setting press and hold together for 5 seconds. ‘P01 & Nor’ will appear on the screen. Rotate clockwise until ‘P03 & HOn’ appears on the screen. Press temperature will begin to flash. Use to select the ‘HOff’ temperature, press to confirm. The settings will be saved and the user will be returned to the previous screen. ‘HOn’ will remain on the screen and the user can select the ‘HOn’ to confirm. Press to return to normal operation.
• Page 24: Calibration menu allows the installer to calibrate the temperature of the thermostat. To access this setting, press and hold two buttons together for 5 seconds. ‘P01 & Nor’ will appear on the screen. Rotate clockwise until ‘P04 & CAL’ appears on the screen. Current actual temperature will appear on the screen. Rotate clockwise or anti-clockwise to calibrate the temperature. Press to confirm the temperature. The current temperature will be saved and the user will be returned to the previous screen. Press to return to normal operation.
• Page 25: Frost protection is built into this thermostat, it is pre-fixed to 5°C and is not adjustable. It will only be activated when the thermostat is in the standby mode and the temperature drops below 5°C. To access this setting, press and hold for 5 seconds. Rotate to confirm. Press to switch between ON and OFF. The setting will be saved and the user will be returned to the previous screen. Press to return to normal operation.
• Page 26: Resetting the thermostat allows the user to restore factory settings. To access the reset setting, press and hold specific buttons together for 5 seconds. ‘P01 & Nor’ will appear on the screen during the process. Rotate the dial and press until ‘P07 & rst’ appears on the screen. Confirm by pressing the designated button. ‘rst’ will appear on the screen and ‘nO’ will flash. Rotate clockwise to change ‘nO’ to ‘YES’ for confirmation. The thermostat will flash on the screen to indicate the reset. If the installer menu is inaccessible, a master reset can be performed using a button on the left side of the thermostat. Follow the same instructions for the master reset.
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