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
90
of
120
PARAMETER
DESCRIPTION
ENTRY RANGE
DEFAULT
527
Fan: pulse/revolution
Note: Leave at the default value of 2
0/1-4
2
486
Fan regulation: proportional band
0-50
MLX EXT 450 2S
-1100 2S: 10
MLX EXT 1500 2S
-3000 2S: 30
487
Fan regulation: integral gain
0-50
9
489
Fan: PWM min.
5-15%
8%
337
Modulation Gradient
1-100%
2%
526
Fan: Maximum Speed
50-120Hz
MLX EXT 450 2S
-1100 2S: 90Hz
MLX EXT 1500 2S
-3000 2S: 91Hz
319
Maximum Modulation
1-100%
100%
346
Minimum modulation
(Burner Minimum modulation level)
1-100%
MLX EXT 450 2S
-1100 2S: 34%
MLX EXT 1500 2S
-3000 2S: 31%
314
Standby modulation
0-100%
MLX EXT 450 2S
-1100 2S: 31%
MLX EXT 1500 2S
-3000 2S: 33%
620
Postpurge: fan speed
0-100%
MLX EXT 450 2S
-1100 2S: 31%
MLX EXT 1500 2S
-3000 2S: 33%
617
Ignition: minimum modulation
0-100%
32%
618
Ignition: maximum modulation
0-100%
82%
353
Temperature control: proportional band
0°F to 90°F
(0°C to 50°C)
Units may be expressed
in R or K
45°F (25C)
354
Temperature control: integral gain
0-50
12
478
Temperature control: derivative gain
0-50
0
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)
336
Temperature control: slope limit
0°F to 54°F/min
(0°C to 30°C/min)
18°F/min
(10°C/min)
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
54°F (30°C)
