Bradford-White Corp B4 warranty Hi-Limit Switch Checkout, Shut-Down Procedure

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BRADFORD WHITE

 

 

 

 

After a setting has been chosen for the tank

temperature control, set the heater temperature control 10°F (6°C) higher. The heater’s temperature control senses the inlet water temperature to the heater. The heater’s manual reset high limit (and automatic reset high limit, if applicable) senses heater outlet temperature.

If the unit is equipped with an automatic reset high limit, set the automatic reset high limit 20°F (11°C) above the outlet temperature to avoid nuisance lockouts. Set the manual reset high limit 5°F (3°C) above the automatic reset high limit.

For units that only have a manual reset high limit (no automatic reset high limit), set the manual reset high limit 20°F (11°C) above the outlet temperature to avoid nuisance lockouts.

Example, Imperial units: If the tank temperature is set to 140°F, set the heater’s temperature control to 150°F (140°F + 10°F). Further, if the temperature rise through the heater is 25°F, the outlet temperature will be 175°F (150°F + 25°F). Therefore, set the automatic reset high limit to 195°F (170°F + 20°F), and the manual reset high limit to 200°F (195°F + 5°F).

Example, Metric units: If the tank temperature is set to 60°C, set the heater’s temperature control to 66°C (60°C + 6°C). Further, if the temperature rise through the heater is 15°C, the outlet temperature will be 81°C (66°C + 15°C). Therefore, set the automatic reset high limit to 92°C (81°C + 11°C), and the manual reset high limit to 95°C (92°C + 3°C).

3.3.2. Internal Water Heater Temperature Control:

When an external control is not used, the circulator between the heater and the storage tank must run continuously, so that the heater’s temperature control can detect and control the water temperature in the storage tank. The water heater’s temperature control is adjusted to its lowest temperature position (130°F, 54°C) when shipped from the factory. This is the preferred starting point for setting the temperature control.

If the unit is equipped with an automatic reset high limit, set the automatic reset high limit 20°F (11°C) above the outlet temperature to avoid nuisance lockouts. Set the manual reset high limit 5°F (3°C) above the automatic reset high limit.

For units that only have a manual reset high limit (no automatic reset high limit), set the manual reset high limit 20°F (11°C) above the outlet temperature to avoid nuisance lockouts.

Example, Imperial units: If the heater’s temperature control is set to 130°F, and the temperature rise through the heater is 25°F, the outlet temperature will be 155°F (130°F + 25°F). Set the automatic reset high limit to 175°F (155°F + 20°F) and set the manual reset high limit to 180°F (175°F + 5°F).

Example, Metric units: If the heater’s temperature control is set to 55°C, and the temperature rise through the heater is 14°C, the outlet temperature will be 69°C (55°C + 14°C). Set the automatic reset high limit to 80°C (69°C + 11°C) and set the manual reset high limit to 83°C (80°C + 3°C).

3.4 Adjustment for Minimum Input Rate (models with modulating gas valve)

Adjust the red knob on the modulating gas valve to the dial number for the desired water temperature (see Table 7). Adjusting the red knob to number

"1" sets the gas flow rate to minimum. The control is factory set at "2" which is satisfactory for most installations.

 

 

Temp.

Dial No.

 

 

 

°F

 

°C

 

 

 

 

1

120

 

49

2

127

 

53

3

135

 

57

4

142

 

61

5

150

 

66

6

157

 

69

7

165

 

74

8

172

 

78

9

180

 

82

Table 7. Water Temperature Setting.

3.5Hi-Limit Switch Checkout

After running the heater for a long enough

period, bring the water temperature within the range of the hi-limit switch and slowly back off the high limit setting until the heater shuts off. The main burners should reignite when the hi-limit switch is reset and turned back up to its original setting. The heater should now run until it shuts off automatically on operating control.

Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the heater.

3.6Shut-Down Procedure

Shut down the heater following the instructions

found on the inside of the heater.

Where there is a danger of freezing, shut off the water supply and remove the drain plugs on both sides of the heater jacket. Drain every part of the system subject to damage from freezing temperatures.

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Contents Copper Brute Table of Contents Introduction WarrantyGeneral Information Technical AssistanceInstallation Instructions Field AssemblyOutdoor Installation Installation InformationSite Location Flooring Typical Installation Combustion and Ventilation Air SupplyIndoor Air Supply MethodOutdoor Air Supply Exhaust Fans or VentsGeneral Information Venting of Combustion ProductsWater Flow Reversible Water ConnectionsHeat exchanger reversal Front Water Hardness Water ChemistryFreeze Protection Pump RequirementsCold water application Hot water supply with vertical tank Pressure Relief Valve Storage Tank InstallationPressure Buildup in Water System Water PressureThermal Circulation of Hot Water Gas Supply and PipingGeneral Instructions Combined Space Heating/Potable Water Heating Systems Electrical WiringOperating Instructions Normal Operating SequenceIgnition System no Sizes ON/OFF with EM2 Ignition System no Sizes ON/OFF with EM2 18BRADFORD WhiteIgnition System no Sizes ON/OFF with Em2Pump W Relay LOW Water CUT-OFF Optional Power Switch Setting the Temperature Controls Start-Up ProcedureRemote Water Heater Temperature Control Shut-Down Procedure Hi-Limit Switch CheckoutInternal Water Heater Temperature Control Replacement of Gas Controls MaintenanceGeneral Instructions Gas valve/burner replacement Cleaning the Heat Exchanger Inspecting the Heat ExchangerChecking the Main Line Gas Pressure Electrical TroubleshootingGas Pressure Tests Checking the Manifold Regulated Gas PressureTesting the Transformer Heater Does Not Come OnTesting the Flow Switch Testing the Electrical Power SupplyTesting the Manual Reset Hi-Limit Switch Testing the Fusible Link Flame roll-out switchTesting the Ignition Control for spark ignition Testing the FuseTesting the High Voltage Ignition Lead Testing the Igniter Electrode Testing the Safety Shutoff for standing pilotTesting the Safety Shutoff For automatic pilot Testing the Pilot Thermocouple for standing pilotHeater Will Not Shut Off Testing for Burner Ignition For standing pilotTesting the Terminal Strip/ External Controls On-Off Main Burner CyclingBradford White

B4 specifications

Bradford-White Corp B4 is a remarkable water heater that embodies innovation, efficiency, and reliability. This product is designed to meet the stringent demands of both residential and commercial applications, making it a versatile choice for various users.

One of the standout features of the Bradford-White B4 is its high-efficiency operation. With advanced insulation technologies, this water heater minimizes heat loss, allowing it to perform efficiently while conserving energy. This efficiency translates to significant cost savings on utility bills, making the B4 an economical option over its lifespan.

Moreover, the B4 employs a robust and durable construction. Engineered with top-quality materials, it boasts a glass-lined tank that prevents corrosion and extends the longevity of the unit. This durable design ensures that users can rely on their water heater for many years, thus reducing the frequency of replacements and repairs.

The Bradford-White B4 is equipped with state-of-the-art technologies to enhance user convenience. Among these technologies is the ICON System, which features an advanced gas control. This control system allows for precise temperature management and ensures optimal performance. Additionally, the B4 comes with a built-in diagnostic system that provides insight into the operation of the unit, helping users identify potential issues before they escalate.

Another significant characteristic of the B4 is its variety of sizes and configurations. This versatility allows for easy installation in different spaces, whether it be a compact utility room or a larger commercial setup. Available in various capacities, the B4 can efficiently deliver hot water for various needs, catering to families of different sizes or businesses with diverse requirements.

Safety is also a top priority for Bradford-White. The B4 includes safety features such as a temperature and pressure relief valve, which acts as a safeguard against potential malfunctions. This adds an extra layer of peace of mind for users concerned about operational safety.

In summary, the Bradford-White Corp B4 combines high efficiency, durable construction, advanced technologies, versatility, and safety features. This makes it more than just a water heater—it is a dependable solution for ensuring hot water availability for various applications. Whether for a home or a commercial setting, the B4 represents a commitment to quality and performance that users have come to trust.
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