Laars NeoTherm NTH Installation and operation instructions manual - page 23
NeoTherm Boiler
Page 23
arrow keys to make the adjustment. When the
adjustment is complete press the
DONE
(or
NEXT
) button
to move to next menu item.
5.2.2.1
Adjusting the Temperature
Display Units in °F or °C
Confirm the display is in SETUP
SETUP
SETUP
SETUP
SETUP mode. Scroll to the
F/C
F/C
F/C
F/C
F/C menu. Press the
UP
or
DOWN
arrow to adjust
between Fahrenheit and Celsius. Press the
DONE
key
when complete.
5.2.2.2
Adjusting the Outdoor Reset
On or Off
Confirm the display is in SETUP
SETUP
SETUP
SETUP
SETUP mode. Scroll to the
LBTHODLOD
LBTHODLOD
LBTHODLOD
LBTHODLOD
LBTHODLOD menu using the
NEXT
button. Use the
UP
or
DOWN
arrows to select on or off. When outdoor reset is
turned on, three new menus will be added to setup mode.
5.2.2.3
Adjusting Low Boiler
Temperature Setpoint
Confirm the display is in SETUP
SETUP
SETUP
SETUP
SETUP mode. Scroll to the
LBT
LBT
LBT
LBT
LBT menu. Use the
UP
or
DOWN
arrows to scroll to the
minimum water temperature desired during outdoor reset.
5.2.2.4
Adjusting High Outdoor
Temperature Setpoint
Confirm the display is in SETUP
SETUP
SETUP
SETUP
SETUP mode. Scroll to the
HOD
HOD
HOD
HOD
HOD menu. Use the
UP
or
DOWN
arrows to scroll to the
maximum outdoor temperature the reset curve will use
to equate to the minimum water temperature.
5.2.2.5
Adjusting Low Outdoor
Temperature Setpoint
Confirm the display is in SETUP
SETUP
SETUP
SETUP
SETUP mode. Scroll to the
LOD
LOD
LOD
LOD
LOD menu. Use the
UP
or
DOWN
arrows to scroll to the
minimum outdoor temperature the reset curve will use
to equate to the maximum water temperature.
5.2.2.6
Anti Short Cycle Time
Confirm the display is in SETUP
SETUP
SETUP
SETUP
SETUP mode. Scroll to the
ASC
ASC
ASC
ASC
ASC menu. Use the
UP
or
DOWN
arrows to adjust the
time for the anti short cycle period. The numbers
displayed are in minutes of delay. The anti short cycle
time creates a delay for the specified period of time
between the completion of a call for heat and when the
next call for heat may occur.
5.2.3 Diagnostic Mode
DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC mode is accessed by holding the
NEXT
button for 3 seconds. DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC mode allows the user to
monitor and control the items shown in
Table 12
. To
scroll through the menu structure use the
NEXT
button.
When a value that is adjustable has been selected the
UP
or
DOWN
arrow keys may be used to adjust the setpoint.
When adjustments are complete press the
DONE
button.
5.2.3.1
High Limit
The appliance high limit sensor is located on the
outlet of the boiler. The sensor is a dual element sensor
that is limit rated. This sensor must be replaced with
Laars original equipment parts only. The high limit is
not adjustable.
5.2.3.2
DHW Limit
The DHW maximum temperature setting has been
adjusted at the factory, and can be viewed by entering
the DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC
DIAGNOSTIC mode and scrolling to the DHW
DHW
DHW
DHW
DHW menu.
Once in the DHW
DHW
DHW
DHW
DHW menu, the maximum temperature will
be displayed. DHW limit is not adjustable.
WARNING
The DHW sensor is NOT a limit rated device. An anti-
scald device MUST be installed to prevent exces-
sively hot water from reaching the end user. Failure
MENU ITEM
DEFINITION
Fahrenheit /
Selects the temperature units being
Celsius
displayed
LBTHODLOD
Turn outdoor reset on or off
LBT
Low boiler temperature setpoint.
Display and set the lowest boiler water
temperature desired during outdoor reset
HOD
High outdoor temperature setpoint.
Display the current setpoint and allow for
adjustment of the high outdoor temperature
setpoint for the reset curve. Cannot be set
above boiler setpoint.
LOD
Low outdoor temperature setpoint.
Display the current setpoint and
allow for adjustment of the Low outdoor
temperature setpoint for the reset curve
RMT
Remote firing control.
(future use)
Set the Remote Firing Control ON or OFF.
This allows the use of a external analog
signal to control boiler modulation
RMT ADR
RMT Address. Display the current
(future use)
Modbus address and allows for adjustment
of the address.
ASC
Anti short cycle. Display the current Anti
Short cycle time and allows for adjustment
using the up and down arrows.
BAC
Backup feature. Not used at this time.
Press DONE to exit menu.
RES
Restore feature. Not used at this time.
Press DONE to exit menu.
PAS
Pass Code entry screen. Not used at this
time. Press DONE to exit menu.
Table 11. Setup Mode Parameters.
MENU ITEM
DESCRIPTION
mA
Display the flame sense signal
Alert codes
Displays the current alert code
Lockout code
Displays the current lockout code
Outlet Limit
Displays outlet temperature limit
DHW limit
Displays Domestic Hot Water limit setting
Stack Limit
Displays Stack limit setting
Min. firing rate
Displays the minimum firing rate allowed
Min. forced
Allows the user to force the boiler to fire at
firing rate
the minimum firing rate
Max forced
Allows the user to force the boiler to fire at
firing rate
the maximum firing rate
Rate indicator
Displays a indicator of the firing rate based
off of the fan RPM. Actual firing rate may
vary depending upon setup.
Table 12. Diagnostic Mode Menu Structure.