Laars FTHW120 Manuals

Manuals and User Guides for Laars FTHW120. We have 1 Laars FTHW120 manual available for free PDF download: Installation And Operation Instructions Manual

Laars FTHW120 Installation And Operation Instructions Manual

Laars FTHW120 Installation And Operation Instructions Manual (92 pages)

Wall-Mounted, Modulating Gas, Condensing, Heating Only, Boiler

Brand: Laars | Category: Boiler | Size: 5 MB

Table of Contents

Table of Contents
2
Introduction
3
Included with the Unit
3
SECTION 2 Product Characteristics Model Nomenclature (Model Number)
4
Specifications, 80 MBH and 100 MBH
5
Dimensions
8
Names of Components
10
Product Flow Paths and Characteristics
13
SECTION 3 Safety Regulations Safety Symbols
14
Safety Precautions and Proper Use
16
SECTION 4 Installation
17
NOTE: for Cascading Installations, Please Refer to
17
Location and Clearances
17
Wall Mount Bracket
18
Combustion Air
19
Venting, Exhaust
21
General Location Guideline
22
Locations for Vent Pipe Terminator
23
Direct Venting Clearances
23
Venting Requirements in the Commonwealth of Massachusetts
24
Air Supply and Vent Connections
26
Vent / Air Pipe Lengths
26
Direct Venting
26
Indoor Combustion Air
27
Vent / Air Pipe Termination
27
Gas Supply and Piping
30
Gas Supply Pressure
35
Gas Setup and Adjustment
36
High Altitude Installations
37
Natural Gas to Propane Conversion
38
Plumbing Guidelines
42
External Plumbing and
42
Water Connection Guidelines
42
Applicable Backflow Preventer
42
Diaphragm Type Expansion Tank
42
Zoning with Zone Valve
43
Zoning with Circulation Pumps
44
Indirect Water Heating
45
Multiple Units Using Zones Pumps and an Indirect for DHW
46
Pressure Relief Valve
47
Disposal of Condensate
48
Electrical Wiring Connections
49
DIP Switches
50
Control Board, Electrical Diagram
51
Ladder Diagram
52
Electrical Connections
53
SECTION 5 Control Display and Operation
55
Control Dial and Buttons
55
LCD Overview
56
Operating Mode
57
Setting the Clock
58
Set Point Change Mode
59
Status Display Mode
60
Installer Mode
61
Storage Mode
64
Outdoor Reset Adjustment
65
External Set Point Temperature Control
65
Error Mode
66
SECTION 6 Error Codes Error Code Table
67
Fault Tree Analysis
70
SECTION 7 Trouble Shooting
72
Diagnostics
72
Suggested Corrective Actions
73
SECTION 8 Maintenance Annual Startup & General Maintenance
75
Flushing the Boiler
76
Freeze Protection
77
SECTION 9 Installation Check Quick View
78
Final Check Lists
79
SECTION 10 Parts
80
Parts Lists & Illustrations (Models 080-140)
80
Parts Lists & Illustrations (Model 199)
86

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