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Manuals and User Guides for National Products BW3. We have
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National Products BW3 manual available for free PDF download: Installation, Start-Up, And Operating Instructions Manual
National Products BW3 Installation, Start-Up, And Operating Instructions Manual (24 pages)
Series B Gas-Fired Induced-Draft Hot Water Boilers
Brand:
National Products
| Category:
Boiler
| Size: 0.36 MB
Table of Contents
Table of Contents
1
Safety Considerations
2
Introduction
3
Boiler Ratings and Capacities
3
Boiler Ratings and Capacities
4
Locating the Boiler
4
Fresh Air for Combustion
5
Boiler Located in Unconfined Space
5
Boiler Located in Confined Space
6
Installation-System Piping
7
For Use with Cooling Units
7
Low Design Water Temperature Systems (below 140°F)
7
Chimney and Vent Pipe Connection
7
Checking Chimney
7
Minimum Vent Pipe Clearance
8
Removing Existing Boiler from Common Venting System
9
Optional Horizontal Venting with Power Venter
9
Gas Supply Piping
10
Checking Gas Supply
10
Connecting Gas Piping
10
Checking Gas Piping
11
Electrical Wiring
11
Electric Power Supply
11
Installing Thermostat
11
Wiring Diagram
11
Sequence of Operation
11
Equipment and Optional Accessories
13
Relief Valve
13
Expansion Tank (Optional)
13
Diaphragm-Type Expansion Tank (Optional)
13
Air-Eliminating Fitting (Air Purger) (Optional)
13
Main Air Vent for Downflow Systems or Diaphragm-Type Expansion Tank (Optional)
13
Automatic Fill Valve (Optional)
13
Drain Valve
13
Water Temperature Control
13
Circulating Pump
14
Blower (Draft Inducer)
14
Pressure Switch
14
Rollout Switch (Flame Rollout Safety Shutoff)
14
Starting Boiler
14
How a Hot Water System Operates
14
Filling System with Water
14
For Your Safety Read before Operating
14
Gas Valve Operating Instructions
15
Checking and Adjusting
16
Gas Valve Safety Shutdown Test
16
Pilot Burner Adjustment
16
Main Burner Air Adjustment
16
Limit Controls Adjustment
16
Thermostat Heat Anticipator Adjustment
16
Safety Controls Check
16
Maintaining Boiler
17
Burners
17
Relief Valve
17
Expansion Tank
17
Boiler Flue Passages
17
Vent Pipe
17
Water System
17
Cleaning Boiler and Burners
17
Blower
18
Service Hints
18
Repair Parts
19
Repair Parts
20
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