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 4
TH
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 2 of 32 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0108_0A
12/15/2015 Ph.: 800-526-0288 GF-146-IN