Laars FT Series Installation And Operation Instructions Manual page 63

The FT Series Heating Only, Boiler
Index
Numbers
27: Cn
28: CP
29: Eh
Auto
30:Cr
Cr:Ct
31: Ct
32: Cd
33: HA
AP:cP
P1:oF or
34:AP
P1:on
P2:oF
or
P2:on
SS:Sd
35: SS
SS: br
FAH(°F)
36: UC
CEL(°C)
37: CM OFF
38: dM OFF
AquA
39: SA
SEnS
40: BP
NOTE: If Parameter 39 does not appear in the Installer mode, reset the unit using
Parameter 3. After a factory reset, Parameter 39 will again appear.
Parameter
Cascade Number
Cascade Parameter
Common Vent
Automatic rotation
Cascade Rotation time
Cascade System
temperature
Cascade System
Temperature Differential
(burner ON)
High Elevation Mode
Internal CH Pump, CH
Pump and DHW Indirect
Pump Test Mode
Internal CH Pump and
CH Pump Test Mode
Internal CH Pump and
DHW Indirect Pump Test
Mode
Allows the user to set the
year of next service
reminder
Allows the user to set
the service reminder
based on BURNER RUN
HOURS
Allows the user to
change the unit
CH Step Modulation
DHW Step Modulation
Select Aquastat (contact)
Type
Select DHW NTC
Sensor Type
Boiler Pump Operation
Description
Cascade Number
Range: 0 (Master), 1(slave 1), ...., 19(slave 19)
"29: CP" has to be set with the total number of units in the
cascade before "28: Cn" can be set. Default 0
Number of units cascaded
Range: 1- 20 , Default 1
Common Vent
Range: ON / OFF, Default OFF
The first unit to operate when there is a T/T call is the unit
that ran the least amount of time during the prior heat calls.
Cascade Rotation time
Range: 0-240 Hours, Default 48 Hours
Cascade System temperature:
Range: 9°F – 180°F, Default 180°F
Cascade System Temperature Differential (burner ON)
Range: 5°F-30°F, Default 10°F
High Elevation Mode ( 0-2, 2-5, 5-8, 8-10 ),
Default HA 0
This function sets the time to run both the Internal CH and
Internal DHW Storage pumps to purge air from the
system. Range: 1 – 30 minutes,Default 5
Turn this function on to activate Internal CH and CH pump
testing. Only works in installation mode. Turns off when in
normal mode. Default OFF
Turn this function on to activate Internal CH and DHW
Indirect pump testing.
Only works in installation mode. Turns off when in normal
mode. Default OFF
Allows the user to set the year of next service reminder
XX / XX / XXXX (MONTH / DAY / YEAR)
Allows the user to set the service reminder based on
BURNER RUN HOURS
(0: OFF, 1~9000Hours) , Default 0
Allows the user to change the unit
Range: °F or °C
Allows the user to turn ON the step modulation, which
regulates burner output in six steps at one minute intervals.
Step modulation will start at the last modulation rate of the
boiler and work up one minute at a time.
Default: OFF (Selection: OFF or ON).
This mode is aquastat (contact) type.
This mode is NTC sensor type.
Allows user to specify internal boiler pump operation
whereby an external pump can "push" through the internal
boiler depending on piping application. Range: ON/OFF
Default: ON
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