Hubbell STH manual Filling the Heater, Startup

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FILLING THE HEATER

1.Begin with all steam, condensate, and water valves closed.

2.Open the isolation valves on the integral circulator line ,if supplied.

3.Open cold water valve, fill unit with cold water. Lift lever on relief valve to relieve trapped air. Release relief valve lever when all traces of air have been vented from the unit. Leave cold water valve open.

STARTUP

1.Turn pump switch to the “ON” position, if supplied. (Do not operate pump without unit being filled with water and isolation valves being opened, as damage to the pump could result).

2.Set control valve thermostat to approximately 30° F below desired temperature, observe unit, if unit operates properly gradually raise set point to desired set point.

3.If unit has a safety system, set hi-limit thermostat to desired temperature. (This thermostat must be set at a higher temperature than the operating thermostat or the unit will never reach the desired temperature). Refer to the enclosed piping and wiring drawings.

4.Gradually open valve to allow heating medium to enter the heating element. (Boiler water lines should be vented to eliminate trapped air). Monitor the tank temperature until the desired temperature is reached. If the temperature regulator shuts off before the desired temperature is reached, or if over-shoot occurs, adjustment of the temperature regulator will be required. (Refer to enclosed O&M manuals for your specific control valve).

5.After control valve adjustments have been made and the desired temperature has been reached, open the valve on the hot water outlet and the building recirculation line.

6.Tightening of some gasketed joints may be required after unit has been heated.

7.Never break any joint, gasketed or screwed on unit until the pressure in the unit has been reduced to zero and the unit drained.

8.Observe operation of unit for 30-40 minutes after initial start up.

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Contents Electric Heater Company Hubbell Electric Heater Company STRATFORD, CTTable of Contents Section Title Page Page Nomenclature for Parts Nomenclature for Accessory Parts Page Section I General Description and Construction TankOuter SHELL, INSULATION, and Supports Tank ConnectionsSteam Heating Coil Steam Operating Controls TrapsSingle Solenoid Safety System OptionsWater Heater Placement Section II Installation and OperationPiping Installation HOOK-UP of AIR and Water Operated Controls Typical Piping Diagram Electrical InstallationFilling the Heater StartupShutdown Quarterly Inspection Section III Scheduled Maintenance and ServicingAnnual Inspection Page Page Page Page Single Safety Solenoid System if installed Double Safety Solenoid System if installed Section IV Adjustment of Temperature Regulators Adjustment of 2-WAY AIR or Water Operated ValvesAdjustment of Pilot Operated Valves Page Section V Troubleshooting OverheatingExcessive vibration Section VI Miscellaneous Charts and Formulas Torque Values Metric Conversions

STH, ST specifications

Hubbell ST and STH connectors are pivotal components in the realm of power and data transmission. Known for their durability and reliability, these connectors are widely implemented in both commercial and industrial applications. Their design caters to the need for efficient connectivity while ensuring safety and performance.

The Hubbell ST connector is engineered with a robust, user-friendly configuration that allows for quick and simple installations. It features a bayonet-style coupling mechanism, which ensures that the connection is secure and resistant to accidental disconnection. This design is especially beneficial in high-vibration environments, making it ideal for use in various industries, including telecommunications, aerospace, and manufacturing.

On the other hand, the STH connector is specifically designed for high-temperature applications and environments where harsh conditions prevail. It is made from high-temperature materials that can withstand significant thermal stress, thus ensuring consistent performance even in challenging conditions. This feature is particularly crucial for industries such as oil and gas, renewable energy, and any sector that relies on high-performance machinery.

Both ST and STH connectors utilize advanced technologies to enhance their performance. They incorporate precision-engineered contact surfaces that allow for optimal electrical flow, while minimizing signal loss. This is especially important in data-intensive industries where maintaining signal integrity is critical. Additionally, these connectors feature insulation systems that provide protection against moisture, dust, and other environmental factors, significantly prolonging their lifespan.

One of the standout characteristics of Hubbell connectors is their versatility. They come in various configurations and sizes, allowing them to cater to a wide range of applications, from telecommunications to industrial machinery. The connectors can handle different voltage levels and current ratings, thus accommodating the requirements of diverse operational setups.

In conclusion, Hubbell ST and STH connectors represent reliability and functionality in connectivity solutions. Their robust construction, advanced technologies, and adaptability make them a top choice for professionals looking for efficient and dependable connectors in demanding environments. Whether it’s ensuring seamless data transmission or providing power to critical systems, Hubbell connectors stand out as a preferred solution across many industries.
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