Service Manual
1Service (continued)
Viewable and changeable control parameters
CAUTION | Before changing parameters, note the |
settings so that the unit can be returned to | |
| its original operating parameters. |
A: General
Date and Time
The control uses an internal clock for the night setback feature and for logging of events. For these features to work correctly, the clock must be set when the boiler is first installed or anytime the boiler has been powered off for more than four (4) hours. To set the clock, parameter A1 must be accessed.
NOTICE | The internal clock does not adjust for | |
Daylight Savings Time and therefore, | ||
| ||
| will require a manual adjustment. |
Software Version
The software version allows the user to view the software version in use by the control. This software controls the operation of the boiler. When a new software version becomes available, the existing control can be replaced with a new control to update the software.
Software version is read only.
Temperature units (°C / °F)
The control can be configured to display temperature in either °C or °F. This parameter can be changed by the user or the installer by accessing parameter A3. The default is °F.
Space Heating (SH) and Domestic Hot Water (DHW) Night Setback Offset
The unit’s internal clock can be set up to run at a lower set point temperature during unoccupied times. Both the space heating and DHW can be programmed for night setback. When in night setback, the control reduces the set point by a fixed amount. For space heating, it subtracts the space heating night setback offset from each of the SH user set points (parameters B1, B6, and B9), or the calculated outdoor reset set point (if lower). For DHW, it subtracts the DHW night setback offset from the tank set point (parameter E2).
NOTE: The DHW night setback will not work without a tank sensor installed.
The installer may adjust the space heating night setback offset by accessing A4 and the DHW night setback offset by accessing parameter A7. The minimum setting is 0°F (0°C) and the maximum setting is 90°F (50°C).
Space Heating (SH) and Domestic Hot Water (DHW) Night Setback On Times
This is the time in which the SH Night Setback Offset becomes active. There are 7 start times and 7 stop times each for the space heating and DHW night setback features. Both may be set to any time within a
NOTICE | Please note that the brackets ([]) denote | |
screen status. | ||
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1.When the screen is first accessed, start trigger number 1 is shown. If a different trigger number is desired, the installer can rotate the NAVIGATION dial until the desired trigger number is displayed. Once the desired trigger number is selected, the installer can press the SCROLL knob and the day of the week will start to flash.
2.The installer can adjust the day of the week to the one he wishes to set. Once the day is set, the installer can press the NAVIGATION dial and the hour will begin to flash.
3.After setting the hour, the installer can press the SCROLL knob and the minutes will flash. Once all settings have been made, the installer can press the RIGHT SELECT [SAVE] key. The installer can now select a different trigger and adjust the settings for that trigger.
4.Once all adjustments are made, the installer can press the RIGHT SELECT [SAVE] key to save all of the new settings and return to the A menu, or press the LEFT SELECT [EXIT] key to return to the A menu without saving the changes.
Space Heating (SH) and Domestic Hot Water (DHW)
Night Setback Off Times
The corresponding space heating night setback stop triggers are set by accessing parameter A6. The stop triggers for the DHW night setback feature can be adjusted by accessing parameter A9. The adjustment procedure for these parameters is identical to the space heating start triggers described above.
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