LAARS EDN Series - Installation, Operation and Maintenance Instructions - Manual (Page 26)

Page 26 LAARS Heating Systems Company
6.6.2 Alarm Acknowledge
When an alarm is activated (LO or one of the F
codes), the control will flash between the alarm display
and the supply temperature. Pressing the power button
(upper left button) for half a second will allow the user
to scroll through the menus for 30 seconds, before
reverting back to the alarm display.
6.6.3 Power On/Off
Pressing the power button on the control (upper
left button) for 3 seconds will turn the controller off.
This will not de-energize the boiler’s power, but will
de-energize the controller. The display will still work,
but the boiler will not acknowledge a call for heat, and
will not be able to fire. This allows the user to check
and set parameters when the boiler is unable to fire.
The display will show “OFF”. When the power button
is pressed again for 3 seconds, the display will show
“ON” briefly, and the boiler will then resume normal
operation.
6.6.4 Low Fire Hold
By pressing and holding the enter button and
the down arrow button for 2 seconds, the user will fix
the Endurance in low fire for 5 minutes. There is no
change in the boiler control display when the unit is in
this mode.
6.6.5 High Fire Hold
By pressing and holding the enter button and the
up arrow button for 2 seconds, the user will fix the
Endurance in high fire for 5 minutes. This can be used
to check and/or set combustion on the appliance. There
is no change in the boiler control display when the unit
is in this mode.
6.6.6 Pump Operation
The Endurance’s internal pump will operate
when any of the following conditions occur:
• Low temperature mode.
• Tank charge mode.
• Heating system (T-T) call for heat.
• Domestic hot water (DHW) call for heat.
• Error condition detected.
• Supply temperature detected as less than
“boiler on point”.
6.6.7 Anti-Condense Valve Operation
The control on the EBP unit opens and closes the
Anti-Condensing Valve (ACV) based on the following
boiler conditions:
ACV Open:
• Heating system (T-T) call for heat, when
there is no tank charge or DHW call for
heat.
• Cycles open and then closes every time the
EBP is powered up.
ACV Closed:
• Domestic hot water (DHW) call for heat.
• Tank charge mode.
• No heating system (T-T) call for heat.
Button Action Result
Up Arrow Press for 1/2 second 1. Scrolls up through view menu
(Upper Right Button) 2. In setup menu, scrolls up through setup menu
3. In setup menu, after parameter is chosen, increases
the value of that parameter
Down Arrow Press for 1/2 second 1. Scrolls down through view menu
(Lower Right Button) 2. In setup menu, scrolls down through setup menu
3. In setup menu, after parameter is chosen, decreases
the value of that parameter
Enter Press and hold for 3 seconds Puts the control is setup mode
(Lower Left Button)
Enter
Press for 1/2 second 1. When in setup view, chooses the parameter that the
(Lower Left Button) user wants to adjust
2. When in setup menu, saves an adjusted parameter
Enter & Up Arrow Together Press both together for 2 seconds High fire hold for 5 minutes
(Lower Left and Upper
Right Buttons Together)
Enter & Down Arrow Together Press both together for 2 seconds
Low fire hold for 5 minutes
(Lower Left and Lower Right
Buttons Together)
Power
Press for 1/2 second When in alarm mode, allows the user to scroll through
(Upper Left Button) menu for 30 seconds
Power Press and hold for 3 seconds Turns control off or on to allow programming without a
(Upper Left Button) call for heat interruption.
Table 4. Boiler Control Button Functions.