Buderus Ecomatic HS 2102 Service Manual
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Buderus Ecomatic HS 2102 Service Manual

Buderus Ecomatic HS 2102 Service Manual

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5645 469 8/97
Service Manual
Ecomatic HS 2102
Save These Instructions !

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  • Page 1 5645 469 8/97 Service Manual Ecomatic HS 2102 Save These Instructions !
  • Page 2 1 minute at 12:00PM every Wednesday to prevent pump seizure. The “Service Manual - Ecomatic HS 2102” will include all information necessary to mount, wire, and place the Ecomatic control into operation. The settings described in this manual are intended for use by the heating contractor.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Mounting Instructions Program Overview Key Code Installation Entries 8-18 Relay Test Testing the Manual Reset High Limit (STB) LCD Test Heating Curve Display Version Number Troubleshooting Procedures Reset Sensor Curves 26-27 Wiring Diagrams 28-29...

  • Page 4: Mounting Instructions

    Mounting Instructions Remove the front panel of the boiler. • Only necessary with G124X and G224 Remove the two screws and housing from the top of the Ecomatic. Insert the two front feet of the control into the holes provided on the top of the boiler.
  • Page 5 Mounting Instructions Electrical connections must be made according to the wiring diagram (See pages 28-31). All the wires should be routed through the cable raceway at the rear of the boiler. Rear panel jacket may be modified per local code. Use the white strain reliefs provided to lock all cables into place on the back of the control.

  • Page 6: Program Overview

    Program Overview Possible settings for the installation level. The following settings allow the heating contractor to customize the Ecomatic HS 2102 control for the particular application. 10. Flue Gas Sensor-FLUE GAS: Language: Factory Setting: Off Factory Setting: American (Not available in the USA) Other Languages: Deutsch, English, Español, Italiano, etc.

  • Page 7: Key Code

    Key Code Key Code The access to the installation level is protected against unauthorized use by a key code. This will enable you to change settings described in this manual. This operating level should only be accessed by a heating contractor or a trained operator. Accessing the installation level.

  • Page 8: Installation Entries

    Installation Entries Reference Temperature - Heating Cur ve Selection The heating curve establishes the relationship between REF TEMP ˚F the outside air and boiler water temperatures. The boiler water temperature is lowered at warmer outside air temperatures and the boiler water temperature is raised at colder outside air temperatures.
  • Page 9 Installation Entries Setting the REF TEMP. The heating curve is adjusted when the reference temperature is changed. The factory setting is 167˚ F; range is 122°F to 194°F. Procedure 1. Enter the key code. 2. Press the “INS” button repeatedly until “REF TEMP” appears in the display.
  • Page 10 4 Installation Entries Setting the FREEZTEMP. To prevent the heating system from freezing in the setback heating mode, the control will automatically run the heating circulator when the outdoor temperature drops below the set value. The factory setting is 34˚ F; range is 14°F to 50°F. To change the FREEZTEMP: 1.
  • Page 11 Installation Entries BFC Room Sensor: The BFC room sensor is an optional room thermostat that allows you to set and adjust day and night time temperatures at the BFC. The BFC allows the control to fine tune the boiler water temperature based on the desired room temperature and the current room temperature.
  • Page 12 Installation Entries Changing the ROOM COMP: (Room temperature compensation) The BFC room sensor compensates for swings in room temperature, (ie: solar gain, open windows, etc.). The amount of compensation can be adjusted according to individual preference. The room temperature compensation range can only be changed if a BFC room sensor has been activated.
  • Page 13 Installation Entries Setback Mode The control allows you to choose a lower nighttime, setback temperature. You can choose from one of the following four modes for night setback. 1. Outside Air Setback - OASETBACK (Factory Setting) 2. Setback - SETBACK 3.
  • Page 14 4 Installation Entries MIN TEMP: The control can be set to maintain a minimum boiler water temperature during the heating mode. This is the ‘MIN TEMP”. The boiler will not fall below the “MIN TEMP” during the heating mode. The factory setting is 50˚ F; range is 50°F to 104*F. To change the “MIN TEMP”: 1.
  • Page 15 Installation Entries MAX TEMP: The control can be set not to exceed a maximum boiler water temperature. The boiler water will not exceed the “MAX TEMP”. The factory setting is 185˚ F; range is 167°F to 194°F. To change the ‘MAX TEMP’: MAX TEMP ˚F 1.
  • Page 16 Installation Entries Flue Gas The flue gas temperature can only be measured with an additional module, not available in the United States. The factory setting is “OFF”. This must remain in the off position or an error message will appear. FLUE GAS...
  • Page 17 Installation Entries Clock The time clock can be adjusted if the clock runs too fast or too slow with the ‘TIM ADJ”. For example: If the clock runs 10 seconds too fast per day, set the TIME ADJ to -10. Range is -59 to +59 sec/day.
  • Page 18 4 Installation Entries OFFSET The “OFFSET” can be used when the actual room temperature differs from the room temperature setting. The “OFFSET” will raise or lower the room temperature the amount of degrees set. The “OFFSET” performs a parallel vertical shift to the heating curve. A 1°adjustment for the “OFFSET”...

  • Page 19: Relay Test

    Relay Test Relay Test You can use the relay test to test the switch relays in the control panel. The following relays can be tested. • Burner • Domestic hot water circulator • Heating circulator R E L A Y To test the relays: 1.

  • Page 20: Testing The Manual Reset High Limit (Stb)

    Testing the Manual Reset High Limit (STB) R E L A Y Figure 1. Switch the control on with the main power switch (I Button). Enter the key code (See page 7) R E L A Y Figure 2. Press the INS repeatedly until “RELAY” appears in the display (See Fig.

  • Page 21: Lcd Test

    LCD Test LCD Test: You can use the LCD Test to check whether all digits and symbols are shown properly in their display. 1. Enter the key code. 2. Press the “INS” button repeatedly until “LCD TEST” appears in the display. 3.

  • Page 22: Heating Curve Display

    Heating Curve Display Heating Cur ve Display You can use the heating curve test to display the heating water temperature at three different outdoor temperatures; 50˚ F, 32˚ F, 14˚ F. ATTENTION: Values can not be changed in this screen, only displayed. HTG CURVE ˚F To view the “HTG CURVE”:...

  • Page 23: Version Number

    Version Number Version Number The version number is a manufacturer’s number and represents the settings of the control. It must be specified when goods are being returned for possible defects. To view the version number: 1. Enter the key code. 2.

  • Page 24: Troubleshooting Procedures

    10 Troubleshooting Procedures The Ecomatic HS 2102 reports the following service messages as part of its self-diagnostic capability. Message (ERR) Meaning Action BURNER Burner lock-out Check burner and press burner reset. BOIL SENS Defective FK sensor Check resistance of FK sensor and verify with curve.

  • Page 25: Reset

    Reset Reset 1. Press and hold down the Time, Insert and Cancel buttons simultaneously until “RESET” appears in the display. 2. Keep all three buttons depressed until all characters have disappeared from the display. This resets all key settings back to the factory settings, language to “AMERICAN”, and unit of temperature to Fahrenheit.
  • Page 26 12 Sensor Curves (General) Switch the power off before taking any measurements. Remove sensors from the back of the Ecomatic and measure the resistance of the cable ends. The curves show mean values and are subject to deviations. Outdoor temperature sensor (FA) Outdoor Temperature (˚F) Boiler, domestic hot water temperature sensors (FK, FB) Boiler Water Temperature (˚F)

  • Page 27: Sensor Curves

    Sensor Curves Room Temperature Sensor (BF) Room Temperature (°F)

  • Page 28: Wiring Diagrams

    13 Wiring Diagrams...
  • Page 29 Wiring Diagrams...
  • Page 30 13 Wiring Diagrams...
  • Page 31 (date of installation) Buderus Hydronic Systems 50 Wentworth Avenue Londonderry, NH 03053 USA Tel: (603) 552-1100 • Fax: (603) 421-2719 www.buderus.net Buderus Hydronic Systems, Inc. reserves the right to make changes without notice due to continuing engineering and technological advances.

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