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 © 2010          D 270 - 08/10

EXERCISING

The control has a built-in exercising feature that is selected through the 

Exercise / Off DIP

 switch. To enable the exercising feature 

set the 

Exercise / Off

 DIP switch to 

Exercise

. If exercising is enabled, the control ensures that each pump is operated at least 

once every 3 days. If a pump has not been operated at least once every 3 days, the control turns on the output for 10 seconds. 
This minimizes the possibility of the pump seizing during a long period of inactivity. While the control is exercising, the 

Test

 LED 

flashes quickly.

Note:

 The exercising function does not work if power to the control or pumps is disconnected.

RUNNING TIMES

The control displays the accumulated running time of the boiler in the VIEW menu.

Resetting the Running Time

To reset the running time for the boiler, select the running time in the VIEW menu. Next press the   and   buttons simultaneously 
until 

CLR

 is displayed.

FACTORY DEFAULTS

The control comes preset with several factory defaults. These are based on the terminal unit selection. To fine-tune building 
requirements, these defaults may be changed.

To reload the factory default, power down the control and wait for 10 seconds. Power up the control while simultaneously 
holding the 

Menu

 and   buttons. An E01 error occurs forcing the installer to go through the ADJUST menu to ensure the 

settings are correct.

BOILER MINIMUM

The boiler minimum is the lowest temperature that the control is 
allowed to use as a boiler target temperature. During mild conditions, 
if the control calculates a boiler target temperature that is below the 

Boiler Minimum 

setting, the boiler target temperature is adjusted to at 

least the 

Boiler Minimum

 setting. During this condition, if the boiler is 

operating, the minimum segment is turned on in the display when viewing 
either the boiler supply temperature or the boiler target temperature. Set 
the 

Boiler Minimum 

setting to the boiler manufacturer’s recommended 

temperature.

BOILER MAXIMUM

The boiler maximum is the highest temperature that the control is 
allowed to use as a boiler target temperature. If the control does target 
the 

Boiler Maximum 

setting, and the boiler temperature is near the boiler 

maximum temperature, the maximum segment will be displayed in the 
LCD while either the boiler target temperature or the boiler temperature 
is being viewed. At no time does the control operate the boiler above 
248

°

F (120

°

C).

FIRE DELAY

The Fire Delay is the time delay that occurs between the time that the control 
closes a stage contact to fire a stage and the burner fires for that stage.

MIN Segment On

MAX Segment

On

MAX Segment

On

Boiler

Contact Closes

Boiler

Fires

Fire

Delay

Time

BOILER TARGET TEMPERATURE

The boiler target temperature is determined by the type of demand received by the control. A boiler demand calculates a boiler 
target based on the characterized heating curve settings and the outdoor air temperature. A DHW demand has a temperature 
setting to which the boiler is operated to meet. 

The control displays the temperature that it is currently trying to maintain as the boiler supply temperature. If the control does not 
presently have a requirement for heat, it does not show a boiler target temperature. Instead, “– – –” is displayed in the LCD.

Section B: Boiler Operation

Содержание D 270

Страница 1: ...Indr UnO Boil Com Sw Boiler Control 270 One Modulating Boiler DHW Boiler Pmp P2 DHW Pmp Vlv H2039A Menu Item Boiler Demand DHW Demand Modulation DHW Priority Override Test o not testing red testing r...

Страница 2: ...sh buttons Menu Item for selecting and adjusting settings As you program your control record your settings in the ADJUST menu table which is found in the second half of this brochure Menu All of the i...

Страница 3: ...gs Burner Displays when Relay 1 is turned on Warning Displays when an error exists or when a limit has been reached Pump Displays when the primary or boiler pump is operating Lock Unlock Displays when...

Страница 4: ...m The supply water temperature is based on outdoor reset or a fixed temperature for DHW Outdoor Reset When a boiler demand signal from the heating system is present the control operates the boiler s t...

Страница 5: ...calculates a boiler target temperature that is below the Boiler Minimum setting the boiler target temperature is adjusted to at least the Boiler Minimum setting During this condition if the boiler is...

Страница 6: ...ut signal range of the 270 control The Minimum Modulation setting limits the control output range in order to match the boiler s input range To calculate the Minimum Modulation use the following formu...

Страница 7: ...residential cast iron boilers or steel tube boilers The Med Mass setting provides a moderate response to the heating system Hi 3 The Hi setting is selected if the boiler that is used has a high therm...

Страница 8: ...of time that the primary pump continues to run is adjustable using the Primary Pump Purge setting The primary pump continues to run until either the purging time has elapsed or the boiler supply temp...

Страница 9: ...ight periods INDOOR SENSOR With the indoor sensor connected the control is able to sense the actual room temperature Indoor temperature feedback fine tunes the supply water temperature in the heating...

Страница 10: ...on the WWSD pointer in the display When the control is in WWSD the Boiler Demand pointer is displayed if there is a boiler demand However the control does not operate the heating system to satisfy thi...

Страница 11: ...contact is opened until the heating system has recovered before returning to DHW operation This mode can be used if a DHW tank is piped in direct return and a DHW valve is installed DHW MODE 4 Extern...

Страница 12: ...heat from the boiler into the DHW tank The control continues this purge for a maximum of four minutes or until the boiler supply water temperature drops 20 F 11 C below the boiler target temperature d...

Страница 13: ...or Sensor 070 One Universal Sensor 082 Data Brochures D 270 D 070 D 001 Application Brochure A 270 Note Carefully read the details of the Sequence of Operation to ensure that you have chosen the prope...

Страница 14: ...power supply must be used to power both the DHW Demand and the Boiler Demand circuits since they both share the Com Dem terminal Output Connections Primary Pump Contact Prim P1 The Prim P1 output term...

Страница 15: ...When these two terminals are shorted together the control registers an unoccupied UNOCC signal Connection to Operate Modulating Boiler 11 12 Mod V dc V dc STEP FIVE TESTING THE WIRING General Each ter...

Страница 16: ...e wiring between the terminal block and pump and refer to any installation or troubleshooting information supplied with the pump If the pump operates properly disconnect the power and remove the jumpe...

Страница 17: ...oth with water and wring out prior to wiping control Do not use solvents or cleaning solutions DIP Switch Settings GENERAL The DIP switch settings on the control are very important and should be set t...

Страница 18: ...measured by the boiler supply sensor 22 to 266 F 30 to 130 C Boiler Target Boiler target temperature is the temperature the control is currently trying to maintain at the boiler supply sensor of the...

Страница 19: ...F 82 C B1 Boiler Minimum The minimum allowed boiler target temperature Check the boiler manufacturer s manual for a recommended setting OFF 80 to 180 F OFF 27 to 82 C Default 140 F 60 C B1 Boiler Maxi...

Страница 20: ...C Default 180 F 82 C DHW Exchange Unoccupied Selects whether or not a DHW demand will be responded to during the UnOccupied period OFF On Default OFF WWSD Occupied The system s warm weather shut down...

Страница 21: ...essed again to advance to the next step This can also be used to rapidly advance through the test sequence To reach the desired step repeatedly press and release the Test button until the appropriate...

Страница 22: ...ystem start up in order to purge air from the piping To enable the Max Heat feature use the following procedure 1 Press and hold the Test button for more than 3 seconds At this point the control flash...

Страница 23: ...to read the boiler supply sensor due to a short circuit The control will not operate the boiler until the sensor is repaired Locate and repair the problem as described in the Data Brochure D 070 To cl...

Страница 24: ...AND FITNESS FOR A PARTICULAR PURPOSE DURA BILITY OR DESCRIPTION OF THE PRODUCT ITS NON INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS AND ITS COMPLIANCE WITH OR NON VIOLATION OF ANY APPLICABLE EN...

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