Watts AERCO MLX EXT 321 - Page 4

Modulex Light Commericial Series
User Manual
OMM-0087_J • GF-143 • 11/17/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 4 of 150
4.37 HIGH ALTITUDE ADJUSTMENT ......................................................................................................................... 79
4.38 HIGH ALTITUDE CONVERSION LABEL ............................................................................................................... 80
4.39 CONVERSION FROM NATURAL GAS TO PROPANE GAS ................................................................................... 81
4.40 CONTROLS AND EMERGENCY FUNCTIONS ...................................................................................................... 82
4.41 INITIAL BOILER IGNITION ................................................................................................................................. 83
Preliminary Checks................................................................................................................................ 83
CHAPTER 5: E8 CONTROLLER AND BCM MODULES ......................................................................... 85
5.1 E8 CONTROLLER ................................................................................................................................................. 85
E8 Controller Features and Functions ..................................................................................................... 85
E8 Display Functions ............................................................................................................................... 86
E8 HEATING Mode Selection .................................................................................................................. 87
E8 MENU Mode Operation (Door Open) ................................................................................................ 88
E8 MENU Navigation and Parameter Settings ........................................................................................ 89
E8 Parameter Navigation, Selection, and Setting ................................................................................... 90
5.2 BCM (BOILER COMMUNICATION MODULE) ...................................................................................................... 91
BCM Features and Functions .................................................................................................................. 91
BCM Description ..................................................................................................................................... 91
CHAPTER 6: OPERATION ....................................................................................................................... 95
6.1 INSTALLATION MENU: INITIALIZING THE E8 CONTROLLER ................................................................................ 96
6.2 QUICK START INSTRUCTIONS ............................................................................................................................. 97
Setting Maximum and Minimum Flow Temperature ............................................................................. 97
Setting Room Temperature and Outdoor Compensation ...................................................................... 98
Setting Heating Programs and Pumps .................................................................................................... 99
6.3 MENU AND SUB-MENU DESCRIPTIONS ........................................................................................................... 100
Menus (Top Level): ............................................................................................................................... 100
Sub-Menus: ........................................................................................................................................... 100
6.4 GENERAL MENU ............................................................................................................................................... 101
6.5 SERVICE MENU................................................................................................................................................. 103
6.6 DISPLAY MENU................................................................................................................................................. 105
6.7 USER MENU ..................................................................................................................................................... 106
6.8 TIME PROGRAM MENU ................................................................................................................................... 109
6.9 EXPERT MENU .................................................................................................................................................. 110
6.10 OTHER POSSIBLE SETTINGS............................................................................................................................ 114
Settings for Heating Circuit ½ ............................................................................................................. 114
6.10.1.1 Heating Adjustment With Constant Flow Temp .............................................................................. 114
6.10.1.2 Temperature Settings For Heating Circuits ...................................................................................... 114
6.10.1.3 A Second DHW Storage Tank ........................................................................................................... 115
6.10.1.4 Temperature Setting For Second DHW Storage Tank ...................................................................... 115
6.10.1.5 Swimming Pool ................................................................................................................................ 115
6.10.1.6 Swimming Pool Temperature Setting .............................................................................................. 115
6.10.1.7 Screed Dry Program (For Floor Heating Installation) ....................................................................... 115
6.10.1.8 Temperature Setting For Screed Program ....................................................................................... 115
6.10.1.9 Signal 0 – 10 V ................................................................................................................................. 115
6.10.1.10 Slope And Temperature Setting with 0 – 10 V Signal ................................................................... 115
SETTING OF DHW CIRCUIT .................................................................................................................. 116
6.10.2.1 Operation of Pumps In Parallel ........................................................................................................ 116
6.10.2.2 Use of a DHW Storage Tank Thermostat (On/Off)........................................................................... 116
6.10.2.3 Antilegion ......................................................................................................................................... 116
6.10.2.4 Setting for Solar Panel Use .............................................................................................................. 116
6.11 ACCESS CODE SETTING .................................................................................................................................. 116
CHAPTER 7: TROUBLESHOOTING ...................................................................................................... 117
7.1 E8 CONTROLLER ERROR CODES ....................................................................................................................... 117
E8 Controller Fault Codes ..................................................................................................................... 119
BCM (Boiler Communications Module) Fault Codes............................................................................. 121