Bradford-White Corp B4 warranty Table of Contents

Internet Version for Reference Only

Page 2 BRADFORD WHITE

TABLE OF CONTENTS

SECTION 1.
General Information
1.1	Introduction	3
1.2	Warranty	3
1.3	Technical Assistance	3
SECTION 2.
Installation Instructions
2.1	General Information	4
2.2	Field Assembly	4
2.3	Site Location	5
2.3.1	Installation Information	5
2.3.2	Outdoor Installation (U.S. only)	5
2.3.3	Flooring - Typical Installation	6
2.4	Combustion and Ventilation Air Supply	6
2.4.1	Outdoor Air Supply	7
2.4.2	Indoor Air Supply	7
2.4.3	Exhaust Fans or Vents	7
2.5	Venting of Combustion Products	8
2.5.1	General Information	8
2.5.2	Replacement of Existing Heater	8
2.6	Water Flow	8
2.6.1	Reversible Water Connections	8
2.6.2	Water Chemistry	11
2.6.3	Freeze Protection	11
2.6.4	Water Hardness	11
2.6.5	Pump Requirements	11
2.6.6	Pressure Buildup in Water System	14
2.6.7	Pressure Relief Valve	14
2.6.8	Water Pressure	14
2.6.9	Pump Installation	14
2.6.10	Storage Tank Installation	15
2.6.11	Thermal Circulation of Hot Water in
	Cold Water Supply Lines	15
2.7	Gas Supply and Piping	15
2.7.1	General Instructions	15
2.7.2	Special Precautions for Propane Gas	16
2.8	Electrical Wiring	16

2.9Combined Space Heating/Potable

	Water Heating Systems	16
2.9.1	Combined Space Heating	16
SECTION 3.
Operating Instructions
3.1	Normal Operating Sequence	16
3.2	Start-Up Procedure	21
3.3	Setting the Temperature Controls	21

3.3.1Remote Water Heater Temperature

Control: 21

3.3.2Internal Water Heater Temperature

Control: 22

3.4Adjustment for Minimum Input Rate

(models with modulating gas valve) 22

3.5	Hi-Limit Switch Checkout	22
3.6	Shut-Down Procedure	22
SECTION 4.
Maintenance
4.1	General Instructions	23
4.2	Replacement of Gas Controls	23
4.3	Heat Exchanger	25
4.3.1	Inspecting the Heat Exchanger	25
4.3.2	Cleaning the Heat Exchanger	25
SECTION 5.
Troubleshooting
5.1	Gas Pressure Tests	26
5.1.1	Checking the Main Line Gas Pressure	26

5.1.2Checking the Manifold

	Regulated Gas Pressure	26
5.2	Electrical Troubleshooting	26
5.2.1	Heater Does Not Come On	27
5.2.2	Testing the Transformer	27
5.2.3	Testing the Electrical Power Supply	28

5.2.4Testing the Manual Reset

Hi-Limit Switch	28
5.2.5 Testing the Flow Switch	28

5.2.6Testing the Fusible Link

(Flame roll-out switch)	28
5.2.7 Testing the Fuse	29

5.2.8Testing the Ignition Control

	(for spark ignition)	29
5.2.9	Testing the High Voltage Ignition Lead	29
5.2.10	Testing the Safety Shutoff
	(for standing pilot)	30
5.2.11	Testing the Safety Shutoff
	(for automatic pilot)	30
5.2.12	Testing the Igniter Electrode	30
5.2.13	Testing the Pilot Thermocouple
	(for standing pilot)	30
5.2.14	Testing for Pilot burner
	(for spark ignition)	30
5.2.15	Testing for Burner Ignition
	(for standing pilot)	31
5.2.16	Heater Will Not Shut Off	31
5.2.17	On-Off Main Burner Cycling	31
5.2.18	Testing the Terminal Strip/External
	Controls	31