LAARS M4-Ext - Installation Manual - Manual (Page 14)

Page 14 LAARS Heating Systems
STARTUP SETTINGS
PROGRAM CHANGE SETTINGS
To be able to change the M4 settings the Program/Run Switch must be set to Program. The
switch is located under the Enclosure Wiring Cover for security. The Enclosure Wiring Cover
can be securely closed using a lock.
RUN PROGRAM RUN PROGRAM
STARTUP SEQUENCE
Button: MENU/<System Startup>
•
When powered, the M4 performs a self-test on its components.
• After the self-test diagnostics have been successfully completed, the M4 will initialize
the panel.
• On the first power up, the System Startup screen will appear after the initialization is
complete. If it doesn’t, the M4 has already been configured.
• The System Startup menu sets the main parameters like the type of sensor, the type of
output, and the modulating mode.
BACK START
-------- SYSTEM STARTUP ------
(START)
to continue
SENSOR TYPE
Set Point °F, Set Point °C, Reset °F, Reset °C Default: Set Point ºF
Button: MENU/<System Startup>/..../Sensor type
•
Reset mode is only available if an outdoor sensor is connected to terminals 25 and 26.
DO NOT select Reset without an outdoor sensor.
• The same LAARS temperature sensor can display in either °F or °C. BACK SAVE
---------- SENSOR TYPE ---------
Set Point F
Set Point C
Reset F
Reset C
• If °F is selected, all temperatures and settings will be displayed in degrees Fahrenheit and
the M4 will operate as a Set Point Control in degrees Fahrenheit.
• If °C is selected, all temperatures and settings will be displayed in degrees Celsius and
the M4 will operate as a Set Point Control in degrees Celsius.
• Set point mode does not require an outdoor sensor. If an outdoor sensor is connected in
Set Point mode it will be used only as an outdoor cutoff point. That is, to turn the boilers
and system pump off.
BACK SAVE
------ EMS INPUT MODE -------
Disable
Enable
BACK SAVE
------ EMS 4ma SETPOINT------
120
F
[ ]
EMS INPUT MODE (AVAILABLE IN SET POINT ONLY)
Disable, Enable Default: Disable
Button: MENU/<System Startup>/..../EMS Input Mode
•
This allows the M4 to receive an external set point from an EMS/BMS system.
• You must select the 4mA (min) and 20 mA (max) Set Points in the following screen.
• The 4mA can be set to any temperature between 70ºF to 200ºF.
• The 20mA can be set to any temperature between 90ºF to 240ºF. However, the minimum
must be 20ºF higher than the 4mA setting.
• Connect the 4-20mA EMS Control Interface to the M4 RS485 connection.
SELECTING THE OUTPUT TYPE
4-20mA, 0-5V, 0-10V, 1-5V, or 2-10V Outputs Default: 4-20mA
Button: MENU/<System Startup>/..../Output A type/Output B type
•
Outputs can be configured for 4-20mA operation (current) or the voltage range can be
selected (0-5V, 0-10V, 1-5V, 2-10V).
• Check the modulating motor to determine its control requirements.
• Select the appropriate Output Type for each of the boilers. The M4 can have a different
Output type for each boiler.
BACK SAVE
------- OUTPUT A TYPE --------
4-20ma
0-10v
0-5v
2-10v
1-5v
CAUTION
A good practice after performing any Startup menu modifications is to
check all operating settings and adjustments to match the new settings.