Setting Of Dhw Circuit; Operation Of Pumps In Parallel; Use Of A Dhw Storage Tank Thermostat (On/Off); Antilegion - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

Modulex Light Commericial Series
CHAPTER 6: Operation
TABLE 6-7: 0-10V Signal with Slope and Temperature
Curve U1
0 2.0 V
1 2.5 V
2 2.5 V
3 2.5 V
4 4.0 V
5 4.0 V
6 4.0 V
7 4.0 V
8 4.0 V
9 4.0 V
10 4.0 V
11 4.0 V

SETTING OF DHW CIRCUIT

6.10.2.1 Operation of Pumps In Parallel

Heating pump operation during DHW production.

EXPERT menu

6.10.2.2 Use of a DHW Storage Tank Thermostat (On/Off)

To use an ON - OFF thermostat instead of DHW sensor.
 Hot Water 
EXPERT menu

6.10.2.3 Antilegion

Activation of an antilegion program.
 Hot Water
EXPERT menu

6.10.2.4 Setting for Solar Panel Use

Use a PT 1000 sensor as a solar panel sensor.
EXPERT menu  Solar/ MF  FUNC RELAY 4 "23"

6.11 ACCESS CODE SETTING

To set the access code, press the Programming button to enter the first parameter, use the data
knob to select a number, and then press the Programming button to accept the value. Repeat
this procedure for each code number position.
OMM-0087_J • GF-143 • 11/17/2020
U2
10.0 V
0.3 V
0.3 V
0.3 V
0.1 V
0.1 V
0.1 V
0.1 V
0.1 V
0.1 V
0.1 V
0.1 V
 F-PUMP PARAL "00,01,02,03"
Hot Water
THER IMPUT "01"

ANTILEGION "01"
Figure 6-12: Setting the Access Code
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
T1 T2
32° F 194° F
100° F 176° F
100° F 167° F
100° F 113° F
68° F 185° F
68° F 167° F
68° F 131° F
68° F 189° F
68° F 189° F
68° F 163° F
68° F 127° F
68° F 194° F
UA
2.0 V
5.0 V
5.0 V
5.0 V
5.0 V
5.0 V
5.0 V
5.0 V
5.0 V
5.0 V
5.0 V
5.0 V
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