TABLE OF CONTENTS
SECTION 1 Product Accessories
1.1 Introduction ............................................................
3
1.2 Included with the Unit ...........................................
3
SECTION 2 Product Characteristics
2.1 Model Nomenclature (model number) ...................
5
2.2 Specifications ........................................................
6
2.3 Dimensions ............................................................
8
2.4 Names of Components ........................................
12
2.5 Product Flow Paths and Characteristics .............
12
2.5.1 Central Heating flow. ...........................................
12
2.5.2 Domestic Hot Water flow. ....................................
13
SECTION 3 Safety Regulations
3.1 Safety Symbols ...................................................
14
3.2 Safety Precautions and Proper Use ....................
16
SECTION 4 Installation
4.1 Location and Clearances .....................................
18
4.2 Combustion Air ....................................................
20
4.2.1 Combustion Air from Room .................................
20
4.2.2 Ducted Combustion Air ........................................
20
4.3 Venting (Exhaust) ................................................
22
4.4 General Location Guideline .................................
23
4.5 Locations for Vent Pipe Terminator......................
24
4.5.1 Direct Venting Clearances ..................................
24
4.5.2 Venting Requirements in
the Commonwealth of Massachusetts ................
25
4.6 Common Vent Test ..............................................
26
4.7 Air Supply and Vent Connections ........................
27
4.7.1 Direct Venting ......................................................
27
4.7.2 Indoor Combustion Air .........................................
28
4.8 Vent / Air Pipe Termination ..................................
28
4.9 Gas Supply and Piping ........................................
31
4.10 Gas Supply Pressure ..........................................
34
4.11 Gas Adjustment ...................................................
34
4.12 High Altitude Installations. ...................................
37
4.13 Natural Gas to Propane Conversion ...................
38
4.14 Plumbing Guidelines ...........................................
42
4.14.1 External Plumbing and Water Conn Guidelines
42
4.14.2 Applicable Backflow Preventer ..........................
42
4.14.3 Closed type Expansion tank ..............................
42
4.14.4 Diaphragm Type Expansion Tank ......................
42
4.14.5 Zoning with Circulation Pumps ..........................
44
4.14.6 Zoning with Zone Valves ...................................
45
4.15 Pressure Relief Valves ........................................
46
4.16 Disposal of Condensate ......................................
47
4.17 Electrical Wiring Connections ..............................
48
4.18 DIP Switches .......................................................
49
4.19 Control Board, Electrical Diagram ......................
50
4.20 Ladder Diagram ...................................................
51
4.21 Electrical Connections .........................................
52
SECTION 5 Control Display and Operation
5.1 Control Dial and Buttons .....................................
54
5.2 LCD Overview ....................................................
55
5.3 Operating Mode ...................................................
56
5.4 Status Display Mode ...........................................
57
5.5 DHW Set Point Change Mode ............................
58
5.6 CH Set Point Change Mode ................................
59
5.7 5.7 Storage Mode ...............................................
60
5.8 Installer Mode ......................................................
61
5.9 Outdoor Reset Adjustment ..................................
63
5.10 External Set Point Temperature Control ..............
63
5.11 Error Mode ..........................................................
64
SECTION 6 Error Codes
6.1 Error Code Tables ..............................................
65
6.2 Fault Tree Analysis .............................................
68
6.2.1 Flame detection ...................................................
68
6.2.2 Gas Detection ......................................................
69
6.2.3 Storage ..............................................................
69
SECTION 7 Trouble Shooting
7.1 Diagnostics ..........................................................
70
7.2 Suggested Corrective Actions .............................
71
SECTION 8 Maintenance
8.1 Annual startup & general maintenance ...............
73
8.2 Flushing or Draining ............................................
75
8.3 Freeze Protection ................................................
76
SECTION 9 Installation Check
9.1 Quick View ...........................................................
77
9.2 Final Check Lists .................................................
77
SECTION 10 Parts List and Illustrations
10.1 MFTCF 140 .........................................................
80
10.2 MFTCF 199 .........................................................
86
