Output modulation trim, Configuration, Display – LAARS M4-LHS - Installation Manual User Manual
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HT# 059295-00
A
M4-LHS installation and Operation Manual
37
Output Modulation Trim
(Available for modulating boilers only)
Adjustable from -1.0 to +1.0
Default: 0.0
Button: MENU/<Maintenance>/Output Trim
• Each of the modulating stages controlled has a separate Output Trim setting.
• Output Trim acts as an adjustment to a stage output percent to match the burner motor.
• After adjusting the Output Trim, test the operation to make sure the results match your
expectation.
-- STAGE A TRIM ---
Output Trim
+0.0
<Prev Stage>
<Next Stage>
BACK ▲ ▼ SAVE
aLErT
DO NOT use the Output Trim for a Stage unless it is absolutely necessary. Test
burner operation and modulation output matching after adjusting the Output Trim.
Configuration
Button: MENU/<Maintenance>/<Configuration>
• This menu option provides a consolidated view of the M4-LHS's Startup and Stage settings.
v1.00, Reset
o
F
Outdoor, Non-HeavyLoad
Switch:35F,5F,0.5Hr
c:mod, 2,Normal
nc:mod, 2,Normal
Shutdown/Disable
BACK NEXT
PROVE
Bst:30, All On
4-20, 4-20,
BAC=Enable, 19200,2
BACK EXIT
OD=
55
o
F SYS=
143
o
F
Prepurge Delay 15
<<A>>
B
67%
20%
STAGE ◄ ► MENU
Button Functions
Buttons
}
Boilers and Their Status
Messages
Outdoor and System Temperature
DiSPLaY
The M4-LHS display layout provides a variety of information that gives an immediate picture of the operation status. The display
shows two boilers at a time. When extensions are present, the two middle buttons (◄ ►) scroll the screen to view additional boilers.
Moreover, all the information displayed can be viewed in brightly or dimly lit rooms.
• The buttons' functionality changes based on the screen and menu level. The buttons' functionality is displayed on a dark
background on the screen bottom line.
• (◄ ►) Horizontal arrows are to scroll through the available stages.
• (▲ ▼) Vertical arrows are to scroll through the menu functions when in menus or to change settings when in a setting screen.
• The Top line displays the Outdoor and System sensor values.
• The third line will list the boiler stages. Additional stages can be scrolled to using the two middle buttons. The lead boiler letter
will be bracketed. See "Lead Boiler Rotation" on page 32. The lead boiler in the lead group will have two sets of brackets.