Burnham Apex APX399 Installation, Operating And Service Instructions page 92

X. Operation
G. Changing Adjustable Parameters (continued)
2. Adjusting Parameters (continued)
Boiler type is factory set and must match the boiler model. Only change the boiler type setting if you are
installing a new or replacement Control. The boiler type setting determines minimum and maximum blower
speeds. incorrect boiler type can cause hazardous burner conditions and improper operation that may result
in PrOPErTY LOSS, PHYSiCaL inJUrY Or DEaTH.
Modulation
"Press" button to access the following parameters:
Setup
Factory range /
Setting Choices
See Table
See Table 30
30
Minimum to
See Table
Maximum
30
Modulation
Minimum to
See Table
Maximum
30
Modulation
Minimum
See Table
- 100 to
30
Maximum
See Table 2500 - Maximum
30 Light-off Rate
Table 30: Parameters Changed Using the Boiler Type Parameter Selections:
Spare Part:
altitude
Boiler Type
Maximum Modulation Rate
Minimum Modulation Rate
Absolute Maximum Modulation Rate
nOTE: Maximum Modulation Rates are designed for 100% nameplate rate at 0°F combustion air. Contact factory before
attempting to increase the Maximum Modulation Rate.
92
Warning
Boiler Type
Boiler Size Setup
To verify the boiler size selection, a qualified technician should do the following:
1. Check boiler's label for actual boiler size.
2. Set "Boiler Type" to match actual boiler size.
3. Select "Confirm".
The Boiler Type parameter changes the minimum and maximum modulation settings. This
parameter is intended to allow a user to set the parameters in a spare part Sage2.1 Controller to a
particular boiler type.
Central Heat Maximum Modulation
This parameter defines the highest modulation rate the Control will go to during a central heat call
for heat. If the rated input of the installed home radiation is less than the maximum output of the
boiler, change the Central Heat Maximum Modulation (fan speed) setting to limit the boiler output
accordingly.
Domestic Hot Water (DHW) Max Modulation
This parameter defines the highest modulation rate the Control will go to during a Domestic Hot
Water call for heat. If the rated input of the indirect water heater is less than the maximum output
of the boiler, change the DHW Maximum Modulation (fan speed) setting to limit the boiler output
accordingly.
Minimum Modulation
This parameter is the lowest modulation rate the Control will go to during any call for heat.
Lightoff rate
This is the blower speed during ignition and flame stabilization periods.
Sage2.1 Controller - P/n 104471-01
Maximum Light-off rate
= 4000
399
-07
7600
2100
8500
Parameter and Description
Sage2.1 Controller - P/n 104471-04
0 -7000 ft.
500
-07
5900
1400
6550
Maximum Light-off rate
= 4000
0 - 5000 ft.
800N
-05
5200
1200
5900
800P
-05
5150
1200
5600