MC2: 10/03/12 Page
4
of
90
GF-115-H
OMM-0083_0B
Modulex MLX Series Gas Fired Boiler System
Operation and Maintenance Manual
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
6.2
DHW (Domestic Hot Water) Storage Tank ................................................................... 31
6.3
Enable / Disable ............................................................................................................. 31
6.4
Installation Of Sensors ................................................................................................... 31
CHAPTER 7: BOILER OPERATION ..................................................................................... 33
7.1
Introduction to Boiler Operation .................................................................................... 33
7.2
Modulation Theory ......................................................................................................... 33
7.3
Ignition Sequence ........................................................................................................... 33
7.4
Modes of Operation ........................................................................................................ 34
7.4.1
Indoor/Outdoor Reset .......................................................................................... 34
7.4.2
0 To 10 Volt Remote Set-Point ........................................................................... 34
7.4.3
Constant Set-Point ............................................................................................... 34
7.4.4
Boiler Operation for Troubleshooting (Manual Mode)....................................... 34
7.5
Modulex Boiler Initial Startup ....................................................................................... 34
7.5.1
Tools & Instruments Required For Combustion Calibration .............................. 35
7.5.2
Installing the Supply Gas Manometer ................................................................. 35
7.5.3
Preparing The Flue For Use With The Combustion Analyser ............................ 36
7.5.4
Supply Gas Pressure Check & Adjustment ......................................................... 36
7.5.5
Combustion Calibration. ..................................................................................... 38
7.6
Unit Reassembly ............................................................................................................ 40
CHAPTER 8: SAFETY DEVICE TESTING .......................................................................... 41
8.1
Testing of Safety Devices .............................................................................................. 41
8.2
Processing and Clearing Fault Codes ............................................................................. 41
8.3
LOW GAS PRESSURE FAULT TEST......................................................................... 42
8.4
LOW WATER LEVEL FAULT TEST ......................................................................... 43
8.5
WATER TEMPERATURE FAULT TEST ................................................................... 44
8.6
FLAME FAULT TESTS ................................................................................................ 45
8.7
SAFETY PRESSURE RELIEF VALVE TEST ............................................................ 46
CHAPTER 9: MAINTENANCE ............................................................................................... 47
9.1
Modulex Preventative Maintenance Kits ....................................................................... 47
9.1.1
Annual Maintenance Kit ..................................................................................... 47
9.1.2
Fireside Inspection Kit ........................................................................................ 47
9.2
Annual Maintenance Instructions................................................................................... 48
9.2.1
REQUIRED Tasks: ............................................................................................. 48
9.2.2
RECOMMENDED Tasks: .................................................................................. 48
9.2.3
Tools Required .................................................................................................... 48
9.2.4
Replacing the Spark Igniters and Flame Detectors ............................................. 50
9.2.5
Testing the Flame Detection Circuitry ................................................................ 50
9.3
Fireside Inspection Instructions ..................................................................................... 50
