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Installation & Operation Manual
56
11 Operating information
Sequence of operation (continued)
OPERATION DISPLAY
8. If the DHW thermostat remains on for more than 30 minutes, and
the space heating call for heat is also on, then the control will turn
on the boiler pump, turn off the DHW pump after 2 seconds, and
resume modulating based on the space heating set point. As long
as both the space heating and DHW calls for heat remain active,
the control will switch back and forth between the two modes until
one of them is satisfied.
BLR: SH 41% RATE
OUT: 123.0F(129)
9. Once both calls for heat are satisfied, the control will turn off the
burner. The blower will remain on for the 10 second postpurge
cycle. Any pumps that are running will continue to run for their
respective pump delay times, then turn off.
BLR: POSTPURGE
OUT: 127.4F(129)
10. Boiler pump off, system pump continues its delay if longer.
BLR: Standby
OUT: 124.7F(129)
11. System pump off.
BLR: Standby
OUT: 122.9F(129)
Access modes
User
The user can adjust space heating target temperature by using
the UP and DOWN buttons (FIG. 11-1 on page 57) at any time
during normal operation. By entering the USER code (0704),
the user can also change temperature units, time and date, and
night setback settings. In User Mode, the following parameters
can be viewed but not changed:
• Boiler outlet water target temperature in DHW
Mode
• Boiler model number
• Software version
• Total operating hours
• Total cycles
Installer
Most parameters are available only to the installer, accessible
only by entering the installer access code, see the Knight Wall
Mount Service Manual.
Saving parameters (reference the Parameter Table in
the Knight Wall Mount Service Manual)
To save parameters and exit programming:
Press the ENTER/RESET button.
To keep parameter settings only for a current operating cycle:
Press the MENU/EXIT button 3 times after making all desired
parameter changes.
To enter a parameter and continue programming:
Press the MENU/EXIT button 1 time to return to the parameter
listings; press again to return to the menu listings. Remember to
press the ENTER/RESET button when finished programming in
order to save the changes made.
See the Knight Wall Mount Service Manual for a detailed
description of parameters and access modes.