Laars FT Series, Installation And Operation Instructions Manual

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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 ......................................
10
2.5 Product Flow Paths and Characteristics ............
12
2.5.1 Central Heating flow.. .......................................
12
2.6 Product Flow Paths and Characteristics ............
13
2.6.1 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 Wall Mount Bracket ............................................
19
4.3 Combustion Air ..................................................
20
4.3.1 Combustion Air from Room ...............................
20
4.3.2 Ducted Combustion Air ......................................
20
4.4 Venting (Exhaust) ..............................................
22
4.5 General Location Guideline ...............................
23
4.6 Locations for Vent Pipe Terminator ....................
24
4.6.1 Direct Venting Clearances ................................
24
4.6.2 Venting Requirements in the
Commonwealth of Massachusetts .....................
25
4.7 Common Vent Test ............................................
26
4.8 Air Supply and Vent Connections ......................
27
4.8.1 Vent / Air Pipe Lengths ......................................
27
4.8.2 Indoor Combustion Air .......................................
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4.9 Vent / Air Pipe Termination.................................
28
4.10 Gas Supply and Piping ......................................
31
4.11 Gas Supply Pressure .........................................
34
4.12 Adjusting Combustion ........................................
35
4.13 High Altitude Installations. .................................
36
4.14 Natural Gas to Propane Conversion ..................
37
4.15 Plumbing Guidelines
.......................................41
4.15.1 External Plumbing and
Water Connection Guidelines
............................
41
4.15.2 Applicable Backflow Preventer ..........................
41
4.15.3 Diaphragm type Expansion tank ........................
41
4.15.4 Zoning with zone valves ....................................
42
4.15.5 Zoning with circulation pumps ...........................
43
4.16 Pressure Relief Valve ........................................
44
4.17 Disposal of Condensate ....................................
45
4.18 DHW Flow Restrictors ......................................
46
4.19 Electrical Wiring Connections ............................
47
4.20 DIP Switches .....................................................
48
4.21 Control Board, Electrical Diagram ....................
49
4.22 Ladder Diagram .................................................
50
4.23 Electrical Connections .......................................
51
SECTION 5 Control Display and Operation
5.1 Control Dial and Buttons ....................................
53
5.2 LCD Overview ..................................................
54
5.3 Operating Mode .................................................
55
5.4 Status Display Mode ..........................................
56
5.5 DHW Set Point Change Mode ..........................
57
5.6 CH Set Point Change Mode ..............................
58
5.7 Storage Mode ....................................................
58
5.8 Installer Parameters ..........................................
59
5.9 Outdoor Reset Adjustment ................................
61
5.10 External Set Point Temperature Control ............
61
5.11 Error Mode .........................................................
62
SECTION 6 Error Codes
6.1 Error Code Tables .............................................
63
6.2 Fault Tree Analysis ...........................................
66
SECTION 7 Trouble Shooting
7.1 Diagnostics ........................................................
68
7.2 Suggested Corrective Actions ...........................
69
SECTION 8 Maintenance
8.1 Annual startup & general maintenance .............
71
8.2 Flushing the Combination Boiler ........................
73
8.3 Draining and Cleaning ......................................
74
8.4 Freeze Protection ..............................................
74
SECTION 9 Installation Check
9.1 Quick View .........................................................
75
9.2 Final Check Lists ...............................................
76
SECTION 10 Parts List and Illustrations
10.1 FT 140 ...............................................................
79
10.2 FT 199 ...............................................................
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