Modulex Light Commercial Series
SECTION 6: Gas Supply and Piping
OMM-0158_A
• 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
85
of
120
6.6 Bcm Parameters
This section provides the list of the parameters in the BCM. See Section 6.4 for instructions on
how to navigate to the BCM parameters.
PARAMETER
DESCRIPTION
ENTRY RANGE
DEFAULT
803
Enabled services
16 = Control via Modbus*
17 = Heating only
18 = Antifreeze only
19 = H Antifreeze
24 = DHW only
25 = H DHW
26 = DHW + Antifreeze
27 = H DHW + Antifreeze
* - Control via Modbus examples: AERCO ACS,
Remote Setpoint from BAS/EMS
See Description
19
483
Maximum Differential Temperature
(Water ΔT protection)
0°F/2°F
–
90°F
(0°C/1°C-50°C)
0 = Disabled;
Units may be expressed
in R or K
MLX EXT 450 2S
-1100 2S
: 45°F
(25°C)
MLX EXT 1500 2S
-3000 2S
: 54°F
(30°C)
34
Burner Hysteresis
9°F to 36°F
(5°C to 20°C)
Units may be expressed
in R or K
9°F (5°C)
31
CH#1: Minimum Setpoint
68°F to 221°F
(20°C to 105°C)
86°F
39
CH#1: Maximum Setpoint
68°F to 221°F
(20°C to 105°C)
185°F
799
Analogue input function 0/10 V:
0 = Backup Controller (BCM) target
temperature
1 = External temperature sensor
2 = 0-10 V Remote Setpoint
3 = DO NOT USE
See Controls Manual OMM-0159 Sections 4.1.1,
4.3.2 and 6.3.1
See Description
1
376
Programmable Input #1 function
0 = CH Service Enable/Disable
1 = System Enable/Disable
2 = DO NOT USE
3 = Backup Controller (BCM) Remote
activation
See Controls Manual OMM-0159 Sections 4.5 and
6.3.2
See Description
0
322
Pump Off Delay
1 - 10 min
3 min
341
Pump: minimum control
(Minimum output pump modulation)
See Controls Manual OMM-0159 Section 6.4.3
0-10V
3V
