Bradford White LAARS MASCOT LX User guide

Page 1
1348-NH
MASCOT LX
START UP GUIDE
(QUICK START MANUAL)

Page 2
LAARS Heating Systems
Up Arrow
Down Arrow
Select Button
Reset Button Cancel Button
T&P Gauge
Power Switch
Display Screen
DHW Temperature
System Temperature
Outdoor Temperature
Shows Setpoints, Fan
Speed, Error codes
Shows
Temperature at
Sensors
Boiler Lock Out
Summer Mode
(warm weather shutdown)
DHW Demand
External Demand Service Mode
CH Demand
Indicates Stack
Temperature Shows Flame %
Shows
Temperature Unit
Inlet or Outlet Sensor

Page 3
MASCOT LX
Electrical Connections
Low Voltage
connections
High Voltage
Connections
Electrical Connections
Low Voltage
connections
High Voltage
Connections
Electrical Connections

Page 4
LAARS Heating Systems
Outdoor Reset Parameters
6:OH = High Outdoor Temp.
7:OL = Low Outdoor Temp.
15:OF = WWSD
16:cH = High Boiler Setpoint
17:cL = Low Boiler Setpoint
•Use the Up or Down
buttons and scroll to
the Outlet Arrow.
•Press and Hold Select button
•Use the Up and Down buttons
to adjust the desired set point.
•Press the Select button to
save the change
Setting CH Set point
1. 2.
Setting DHW Set point (Combi only)
1. 2.
•Use the Up or Down
buttons to scroll to the
DHW Icon.
•Press and Hold Select button
•Use the Up and Down buttons
to adjust the desired set point.
•Press the Select button to
save the change

Page 5
MASCOT LX
•Install and connect the Outdoor Sensor to terminals
marked Outdoor Sensor.
•Then go to the Installer Mode to complete the set up.
Outdoor Reset
Installer Mode, Outdoor Reset
1. 2.
3. 4.
•Press and Hold BOTH the
Down and Select buttons until
“U00” appears
•Press Select button
•“U00” will flash
•Press the Up button until it reads “15”
•Press Select button, “U00” will stop
flashing.
•You can now scroll through the Installer
Parameter list.
•Use the Down button and scroll to “P64”
•
Press Select to adjust the Low Boiler Supply
Temperature
•Press Select to save the change

Page 6
LAARS Heating Systems
Service Mode
Press &
Hold
Measuring and Adjusting CO2
Installer Mode, Outdoor Reset
5. 6.
7. 8.
•Use the Down button and scroll to “P63”
•Press Select to adjust the High Outdoor Air
Temperature
•Press Select to save the change
•Use the Down button and scroll to “P62”
•Press Select to adjust the High Boiler
Temperature
•Press Select to save the change
•Use the Down button and scroll to “P61”
•Press Select to adjust the Low Outdoor Air
Temperature
•Press Select to save the change
•Press and Hold Select to
exit installer Mode

Page 7
MASCOT LX
1346-NH
Service Mode
(30 min time out)
•Set firing rate in
percentage and
RPM.
• Pressing Up or
Down buttons
allows user to
adjust fan speed to
maximum or
minimum input
allowing
adjustment of CO2 Service Mode
(press and hold Select
button to exit)
Press
Select
Button to
toggle
between
High and
Low Fire
Measuring and Adjusting CO2
GAS TYPE C02 (%) RANGE
Natural 8.8-9.8
Propane 9.8-10.8
High
Fire
Setting Low Fire
Setting

Customer Service and Product Support: 800.900.9276 • Fax [phone]
Headquarters: 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax [phone]
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax [phone]
www.Laars.com Litho in U.S.A. © Laars Heating Systems 1510 Document 1348
MASCOT LX