Service Manual
25
1 Service (continued)
Night Setback Screen
Figure 1-11A SH Night Setback
Offset Temperature
Once the internal clock has been set correctly, the night setback feature can be used to program a lower set point. The value
of this parameter will be subtracted from the normal set point to determine the set point used during night setback. The
temperature range for this parameter is 0°F to 90°F (50°C). The feature is turned off with a setting of 0°F.
DWH/SH Night Setback Schedules
Night Setback allows DHW (domestic hot water) and SH (space heat) temperatures to be offset (lowered) during periods
where the building is either unoccupied or seasonal use allows lower temperatures. Twelve schedules will allow the user to
customize systems to maintain comfort while conserving energy during low-demand periods. Offsets can be scheduled for SH
(space heat) or DHW (domestic hot water) settings either individually or together. From this screen you can enable/disable
setbacks or press EDIT (FIG. 1-11A) to further customize schedules by month or day. If you enable or disable schedules
from this screen, you will also need to apply the changes. The Menu drop-down and Setup/Configuration icons should be
highlighted if changes are pending. Pressing the highlighted icon will show an option to APPLY or CLEAR changes. Pressing
APPLY will allow the user to review changes prior to applying them. Pressing CANCEL will allow you to re-edit or clear the
changes while pressing SEND will apply the changes.
- SH (Space Heat) is the set point for temperature used during space heating calls.
- DHW (Domestic Hot Water) is the set point used for temperature when heating water.
Menu
Parameter Name
(as shown on the LCD screen)
Min Max Default
Value Value Value
Offset Temperature (F) 0 90 0
DHW/SH
NIGHT
SETBACK
Table 1G DHW/SH Night Setback
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