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VW-PW250
User Manuals: Laars VW-PW250 Water Heater
Manuals and User Guides for Laars VW-PW250 Water Heater. We have
1
Laars VW-PW250 Water Heater manual available for free PDF download: Installation, Operation And Maintenance Instructions
Laars VW-PW250 Installation, Operation And Maintenance Instructions (32 pages)
Mighty Therm Volume Water Heaters
Brand:
Laars
| Category:
Water Heater
| Size: 1.85 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
8
Replacement of Existing Heater
8
Water Flow
8
Reversible Water Connections
8
Water Chemistry
11
Freeze Protection
11
Water Hardness
11
Pump Requirements
14
Pressure Buildup in Water System
14
Pressure Relief Valve
14
Water Pressure
14
Pump Installation
14
Storage Tank Installation
15
Thermal Circulation of Hot Water in Cold Water Supply Lines
15
Gas Supply and Piping
16
General Instructions
16
Special Precautions for Propane Gas
16
Electrical Wiring
16
Section 3.
17
Combined Space Heating/Potable Water Heating Systems
17
Combined Space Heating
17
Operating Instructions
17
Normal Operating Sequence
17
Start-Up Procedure
17
Setting the Temperature Controls
20
Remote Water Heater Temperature Control
20
Internal Water Heater Temperature Control
20
Adjustment for Minimum Input Rate (Models with Modulating Gas Valve)
21
Section 4.
22
Hi-Limit Switch Checkout
22
Shut-Down Procedure
22
Maintenance
22
General Instructions
22
Replacement of Gas Controls
22
Troubleshooting
24
Heat Exchanger
24
Section 5.
24
Inspecting the Heat Exchanger
24
Cleaning the Heat Exchanger
24
Gas Pressure Tests
24
Checking the Main Line Gas Pressure
24
Checking the Manifold Regulated Gas Pressure
25
Electrical Troubleshooting
25
Heater Does Not Come on
25
Testing the Transformer
26
Testing the Electrical Power Supply
26
Testing the Manual Reset Hi-Limit Switch
26
Testing the Flow Switch
26
Testing the Fusible Link (Flame Roll-Out Switch)
26
Testing the Fuse
27
(For Spark Ignition)
27
Testing the Ignition Control
28
Testing the Ignition Control (for Standing Pilot)
28
Testing the High Voltage Ignition Lead
28
Testing the Safety Shutoff
28
(For Standing Pilot)
28
Testing the Safety Shutoff (for Automatic Pilot)
28
Testing the Igniter Electrode
28
Testing the Pilot Thermocouple (for Standing Pilot)
29
Testing for Pilot Burner
29
(For Spark Ignition)
29
Section 6.
30
Testing for Burner Ignition (for Standing Pilot)
30
Heater will Not Shut off
30
On-Off Main Burner Cycling
30
Testing the Terminal Strip/External Controls
30
Parts List
30
General Information
30
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