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Mighty Therm VW-175
User Manuals: Laars Mighty Therm VW-175 Water Heater
Manuals and User Guides for Laars Mighty Therm VW-175 Water Heater. We have
1
Laars Mighty Therm VW-175 Water Heater manual available for free PDF download: Installation & Operation Manual
Laars Mighty Therm VW-175 Installation & Operation Manual (32 pages)
Volume Water Heaters
Brand:
Laars
| Category:
Water Heater
| Size: 0.63 MB
Table of Contents
Table of Contents
2
Section
3
General Information
3
Introduction
3
Warranty
3
Technical Assistance
3
Section 2.
4
Installation Instructions
4
General Information
4
Field Assembly
4
Site Location
5
Installation Information
5
Outdoor Installation (U.S. Only)
5
Flooring - Typical Installation
6
Combustion and Ventilation Air Supply
6
Outdoor Air Supply
7
Indoor Air Supply
7
Exhaust Fans or Vents
7
Venting of Combustion Products
7
General Information
7
Replacement of Existing Heater
8
Water Flow
8
Reversible Water Connections
8
Water Chemistry
11
Freeze Protection
11
Water Hardness
11
Pump Requirements
11
Pressure Buildup in Water System
11
Pressure Relief Valve
14
Water Pressure
14
Pump Installation
14
10. Storage Tank Installation
14
11. Thermal Circulation of Hot Water in Cold Water Supply Lines
15
Gas Supply and Piping
15
General Instructions
15
Special Precautions for Propane Gas
16
Electrical Wiring
16
Combined Space Heating/Potable Water Heating Systems
16
Combined Space Heating
16
Potable Water Heating
16
Section 3.
17
Operating Instructions
17
Normal Operating Sequence
17
Start-Up Procedure
17
Setting the Temperature Controls
17
Section 4.
20
Adjustment for Minimum Input Rate (Models with Modulating Gas Valve)
20
Hi-Limit Switch Checkout
20
Shut-Down Procedure
20
Maintenance
20
General Instructions
20
Replacement of Gas Controls
21
Heat Exchanger
22
Inspecting the Heat Exchanger
22
Troubleshooting
23
Section 5.
23
Cleaning the Heat Exchanger
23
Gas Pressure Tests
23
Checking the Main Line Gas Pressure
23
Checking the Manifold
24
Regulated Gas Pressure
24
Electrical Troubleshooting
24
Heater Does Not Come on
24
A-2. Checking the Manifold Regulated Gas Pressure
24
Testing the Transformer
25
Testing the Electrical Power Supply
25
Testing the Manual Reset
25
Hi-Limit Switch
25
Testing the Flow Switch
25
Testing the Fusible Link
26
(Flame Roll-Out Switch)
26
Testing the Fuse
26
(For Spark Ignition)
26
(For Standing Pilot)
27
10. Testing the High Voltage Ignition Lead
27
11. Testing the Safety Shutoff (for Standing Pilot)
28
12. Testing the Safety Shutoff
28
(For Automatic Pilot)
28
13. Testing the Igniter Electrode
28
14. Testing the Pilot Thermocouple (for Standing Pilot)
28
15. Testing for Pilot Burner (for Spark Ignition)
28
16. Testing for Burner Ignition (for Standing Pilot)
29
17. Heater will Not Shut off
29
18. On-Off Main Burner Cycling
29
19. Testing the Terminal Strip/External Controls
29
Section 6.
30
Parts List
30
General Information
30
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