Watts AERCO EXT Installation, Operation & Maintenance Manual page 31

Ufly Controller and BCM for Modulex EXT
CHAPTER 4: UFLY SETUP AND PROGRAMMING
803: Enabled services 799: 0/10V input 799: 0/10V input 803: Enabled services
483: Max differential temperature 376: Input#1: function 483: Max differential temperature 376: Input#1: function
34: Burner Hysteresis 322: Pump: overrun 34: Burner Hysteresis 322: Pump: overrun
341: Pump: minimum control 341: Pump: minimum control
31: CH#1: Minimum setpoint 31: CH#1: Minimum setpoint
313: Pump: maximum control 313: Pump: maximum control 39: CH#1: Maximum setpoint 39: CH#1: Maximum setpoint
3. Scroll to Parameters 31 and 39 and set values.
• The remote setpoint value for 10V is set using Parameter 39.
• The remote setpoint value for voltage input between 0V and 10V is linearly distributed
between 32°F and the value set for Parameter 39.
• The heat request is maintained until the remote setpoint falls 3.6°F below the value set
for Parameter 31, at which point the unit will go to Standby.
• The heat request will resume when the voltage input reaches the value set for
Parameter 31.
Example:
Set Parameter 39 = 140°F
Set Parameter 31 = 90°F
10V signal will call for 140°F setpoint.
9V signal will call for 129°F setpoint.
7.5V signal will call for 113°F setpoint.
Unit will go to Standby when voltage signal drops to 5.04V (86.4°F remote setpoint).
Unit will resume operation when voltage signal reaches 5.37V (90°F).
OMM-0159_A_A • 6/28/2022
hcm hcm hcm hcm
803: Enabled services 803: Enabled services 799: 0/10V input
483: Max differential temperature 376: Input#1: function 483: Max differential temperature
34: Burner Hysteresis 322: Pump: overrun 34: Burner Hysteresis
341: Pump: minimum control
31: CH#1: Minimum setpoint 31: CH#1: Minimum setpoint
39: CH#1: Maximum setpoint 313: Pump: maximum control 39: CH#1: Maximum setpoint
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2
19 19 2
0 0
0 0
°R °R
9 9
5 5
min min °R °R
77 90
3.0 3.0
Volt Volt °F °F
185 140
10.0 10.0
Volt Volt
°F °F
hcm hcm hcm
19 19 2
0 0
0
°R °R
9 9
5
min °R °R
77 90
3.0
Volt °F °F
185 140
10.0
Volt
°F °F
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