2.1 Correct Use of The Appliance ...................................................................................................................... 10

2.2 Water Treatment ........................................................................................................................................ 10

2.3 Information To Be Made Available to The User ............................................................................................ 10

2.4 Safety Warnings .......................................................................................................................................... 11

2.5 Modifications To Parts Connected to The Appliance .................................................................................... 11

2.6 For Appliances Operating with Propane Gas ................................................................................................ 11

2.7 Data Plate ................................................................................................................................................... 12

2.8 Operational Requirements .......................................................................................................................... 13

2.8.1 General Requirements ...................................................................................................................... 13

2.8.2 Regulatory Requirements ................................................................................................................. 13

2.8.3 Water Quality Requirements ............................................................................................................ 14

2.9 Tools, Materials, and Additional Equipment ................................................................................................ 14

2.10 Disposal Of Packaging and Parts ................................................................................................................ 15

2.11 General Warnings ..................................................................................................................................... 15

2.11.1 Using the Operation and Maintenance Manual ............................................................................... 15

2.11.2 Installation and Servicing Personnel ................................................................................................ 15

2.11.3 Installation Materials ...................................................................................................................... 15

2.11.4 Preparing Boiler for Servicing .......................................................................................................... 15

2.11.5 Returning a Boiler to Service ........................................................................................................... 15

2.11.6 Change in Ownership ...................................................................................................................... 15

2.12 Operational Limits of The Boiler ................................................................................................................ 15

CHAPTER 3: TECHNICAL FEATURES & DIMENSIONS ..................................................................... 16

3.1 MODULEX EXT Commercial Technical Features............................................................................................ 16

3.1.1 Temperature Control Devices: .......................................................................................................... 16

3.1.2 Control Panel (Ufly) Includes: ............................................................................................................ 16

3.1.3 Other Features Include: .................................................................................................................... 16

3.2 General Boiler Operation ............................................................................................................................ 17

3.3 Boiler Freeze Protection .............................................................................................................................. 17

3.4 Dimensional Drawings................................................................................................................................. 18

3.5 Performance Data ....................................................................................................................................... 21

CHAPTER 4: INSTALLATION INSTRUCTIONS .................................................................................. 22

4.1 Installation Warnings and Requirements ..................................................................................................... 22

4.1.1 Appropriate Use of the Boiler ........................................................................................................... 22

4.1.2 Prerequisite System Flushing ............................................................................................................ 22

4.1.3 Installation Personnel Qualifications ................................................................................................. 22

4.1.4 Carbon Monoxide Detector Installation ............................................................................................ 22

4.1.5 Installation Conformity Requirements .............................................................................................. 22

4.2 Code And Standards Approvals ................................................................................................................... 23

4.3 Packaging ................................................................................................................................................... 23

4.4 Transporting And Securing the Boiler Safely ................................................................................................ 24

4.5 Unpacking The Boiler .................................................................................................................................. 24

4.6 Boiler Package Contents .............................................................................................................................. 25

4.7 Location in Boiler Room .............................................................................................................................. 26

4.7.1 Boiler Room Safety Concerns ............................................................................................................ 26

4.7.2 Products to Avoid in the Boiler Room................................................................................................ 27

4.8 Recommended Clearances for Servicing ...................................................................................................... 27

4.9 Gas Connection General Information .......................................................................................................... 28

4.9.1 Natural Gas Connections .................................................................................................................. 29

Natural Gas Piping Sizes ................................................................................................................. 29

Natural Gas Piping Connections ..................................................................................................... 29

Natural Gas Supply Pressure Requirements .................................................................................... 29

4.9.2 Propane Gas Connections ................................................................................................................. 29

OMM-0160_A • DRAFT

Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST

Page 2 of 117

Table of Contents

This manual is also suitable for:

Aerco mlx ext 1500 2s Aerco mlx ext 2300 2s Aerco mlx ext 2600 2s Aerco mlx ext 3000 2s

Table Of Contents - Watts AERCO EXT Installation, Operation & Maintenance Manual