
MFC Series Boilers Installation Manual
TABLE OF CONTENTS
SECTION 1: INTRODUCTION................................................................................................................2
SECTION 2: SAFETY WARNINGS AND CAUTIONS.............................................................................3
SECTION 3: MOVING THE MFC BOILER AND 4TH PASS UNITS .........................................................3
SECTION 4: INSTALLATION REQUIREMENTS....................................................................................4
4.1 Electrical Requirements.......................................................................................................................................4
4.2 Natural Gas Requirements...................................................................................................................................4
4.3 Fuel Oil Requirements .........................................................................................................................................4
4.4 Installation Clearances.........................................................................................................................................4
SECTION 5: MATERIALS AND TOOLS ................................................................................................7
5.1 Assembly Materials Supplied with Boiler ............................................................................................................7
5.2 Assembly Materials Supplied in Separate Kits.....................................................................................................9
SECTION 6: DRAIN & CONDENSATE PIPING ASSEMBLY ...............................................................10
6.1 Boiler Drain Piping Assembly .............................................................................................................................10
6.2 Condensate Drain Piping Assembly ...................................................................................................................11
SECTION 7: ASSEMBLY OF 4TH PASS TO BOILER .........................................................................12
SECTION 8: BOILER PIPING INSTALLATION....................................................................................15
8.1 Rear Connection Pipe Installation to Boiler .......................................................................................................15
8.2 Expansion Joint and Front Connection Pipe Installation ...................................................................................16
8.3 Final piping Connection Check and Torque Values............................................................................................18
SECTION 9: CONTROL & SAFETY DEVICE INSTALLATION.............................................................19
9.1 Low Water Cutoff Installation............................................................................................................................20
9.2 Operating Hi-Limit & Manual Reset Hi-Limit Installation ..................................................................................21
9.3 Tridicator Installation.........................................................................................................................................21
9.4 Temperature Sensor (For Modulation Control) Installation ..............................................................................21
9.5 Pressure Relief Valve(S) Installation ..................................................................................................................22
SECTION 10: BLOWER/BURNER ASSEMBLY...................................................................................23
10.1 Connecting the Blower/Burner to The Boiler ..................................................................................................24
10.2 Burner/Blower Features..................................................................................................................................25
10.3 Burner/Blower Wiring......................................................................................................................................25
SECTION 11: BURNER DOOR............................................................................................................26
11.1 Burner Door Opening Orientation...................................................................................................................26
11.2 Reversing the Opening Direction of the Burner Door......................................................................................26
11.3 Adjusting the Boiler Door – Vertical and Horizontal........................................................................................29
APPENDIX A: RIELLO BURNER WIRING DIAGRAM ..........................................................................31
SECTION 1: Introduction
These instructions are for the assembly of the MFC Series boilers. The parts necessary for
assembly are provided in a kit and stowed inside the burner.
Parts, such as sensors and gauges, are shipped in a separate container.
The tool necessary to open the boiler door is attached to the unit just above the door to enable
access to the parts within the burner.
IMPORTANT:
Unless otherwise specified, all descriptions and procedures provided in this Installation,
Operation & Maintenance Manual apply to the MFC Series boilers.
Page 2of 32 AERCO International, Inc. •100 Oritani Dr. •Blauvelt, NY 10913 OMM-0108_0A
12/15/2015 Ph.: 800-526-0288 GF-146-IN