Watts AERCO EXT Installation, Operation & Maintenance Manual page 77

Ufly Controller and BCM for Modulex EXT
0 APPENDIX A: BCM PARAMETERS
PARAMETER DESCRIPTION
Pump: minimum control
341
(Minimum output pump modulation)
See Section 6.4.3
Pump: maximum control
313
(Maximum output pump modulation)
See Section 6.4.3
792 CH Maximum modulation
CH Parallel: maximum error
This is the maximum boiler outlet error that
disables the CH and DHW parallel operation.
Parallel operation of space heating/DHW is
611
deactivated (space heating secondary pump stops)
when boiler outlet temperature falls below Boost
Temperature Setpoint (Param. 660) by the amount
of Parameter 611.
CH Parallel: modulation maximum
This is the maximum firing rate that enables the
CH and DHW parallel operation; during parallel
612
operation, space heating secondary pump is
allowed to run while DHW demand is present;
0 = No parallel Operation
DHW: Minimum Setpoint
650
DHW setpoint must be set higher than the value of
Parameter 650.
385 DHW: Maximum Setpoint
DHW: tank adjustment (tank
temperature regulation gain)
360
Leave this Parameter set = 0 for a constant boost
temperature (Param. 660) when DHW is present
DHW request: tank to target
temperature differential
• DHW demand is present when DHW outlet/tank
temperature falls below the DHW setpoint by the
656
amount of Parameter 656.
• DHW demand is satisfied when DHW
outlet/tank reaches a temperature above the DHW
setpoint by the amount [Param. 657 minus Param.
656]
DHW: Requested Temp. Hysteresis
• DHW demand is satisfied when DHW outlet/tank
657
reaches a temperature above the DHW setpoint by
the amount [Param. 657 minus Param. 656]
310 DHW Pump Off Delay
DHW: Maximum Boiler Temperature
This is the boost temperature. When DHW demand
660
is present, the value of Parameter 660 will be the
boiler setpoint.
CH#1: setpoint
48
(CH maximum target temperature)
OMM-0159_A • 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
ENTRY RANGE DEFAULT
0-10V 3V
0-10V 10V
0-100% 100%
0°F to 54°F
(0°C to 30°C)
9°F (5°C)
Units may be expressed
in R or K
0-100% 0%
77°F to 113°F
95°F (35°C)
(25°C to 45°C)
122°F to 149°F
149°F (65C)
(50°C to 65°C)
0-15 0
-36°F to 36°F
(-20°C to 20°C)
7°F (4C)
Units may be expressed
in R or K
2°F to 36°F
(1°C to 20°C)
14°F (8C)
Units may be expressed
in R or K
5 - 600 sec 60 sec
122°F to 212°F
167°F (75C)
(50°C to 100°C)
68°F to 221°F
185°F (85C)
(20°C to 105°C)
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