Watts AERCO EXT Installation, Operation & Maintenance Manual page 78

Ufly Controller and BCM for Modulex EXT
0 APPENDIX A: BCM PARAMETERS
PARAMETER DESCRIPTION
CH#1: parallel DHW
(Heating/DHW Parallel Operation)
0 = DHW demand is priority, Parallel
Operation is disabled.
64 1 = Parallel operation of space heating
and DHW is allowed provided the Boost
Temperature setpoint (Param. 660) is
satisfied and the Current Fire Rate is less
than a predefined limit (Parameter 612).
649 Burner: Minimum Setpoint
Minimum modulation:
Part of the algorithm that determines
346 when burners are turned on/off.
NOTE: This is not the minimum firing rate
of the boiler.
800 Burners: minimum inserted
Cascade: insert lock time
616
(Burner insertion delay time)
Cascade: remove lock time
613
(Burner removal delay time)
Generator: automatic restart
674 (How often boiler changes operating
burners to balance wear and tear).
Disable Burners Map - NOT APPLICABLE.
647
Note: Leave at default value of 0
First Burner Priority - NOT APPLICABLE.
648
Note: Leave at default value of 0
336 Temperature control: slope limit
353 Temperature control: proportional band
354 Temperature control: integral gain
478 Temperature control: derivative gain
816 Modbus Address
817 Modbus Communication Timeout
Temperature unit
896 0: °C
1: °F
System configuration
(Application Code)
309
0 = Burner cascade (BMM)
1 = DO NOT USE
OMM-0159_A • 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
ENTRY RANGE DEFAULT
See Description 0
68°F to Param. 39
68°F (20°C)
(20°C to Param. 39)
MLX EXT 450 2S
-1100 2S: 31%
0-100%
MLX EXT 1500 2S
-3000 2S: 28%
1-8 1
30 - 900 sec 120 sec
MLX EXT 450 2S
-1100 2S: 120 sec
30 - 900 sec
MLX EXT 1500 2S
-3000 2S: 60 sec
1-10 hr 2 H
0
0
2°F to 54°F/min
9°F/min (5°C/min)
(1°C to 30°C/min)
0°F to 90°F
(0°C to 50°C)
45°F (25C)
Units may be expressed
in R or K
0-50 12
0-50 0
1-127 1
0 - 240 sec 30 sec
See Description 1
See Description 0
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