Hubbell MSH, MH manual Optional Steam Package, Benefit Of Dual Fuel Capability

Marine Products Division

Optional Steam Package

Benefit Of Dual Fuel Capability

The Hubbell model MSH and MH water heater is available with a factory installed heat exchanger to provide heating capability utilizing ships steam or boiler water. While the ship is under way and the boilers are producing steam, the water heater will operate in “primary” mode and use steam to heat the water. When the ship is dockside, and steam generation is reduced (or completely shut down), the operator can switch the water heater over to electric heating mode by simply turning a switch on the Hubbell control panel which activates the factory packaged and installed electric immersion heaters. This dual fuel capability provides ship operators with complete flexibility in determining which fuel mode is most advantageous to operate at any given time.

Electric Control Panel

Electric

Heater

Steam Heating Coil (steam controls not shown)

	Standard Features		Optional Features
Steam Heating Coil		Optional vessel construction and optional general
1.	A high quality factory installed 2 pass U-Tube heating	construction features as shown on page 3.
	coil constructed from 18 BWG 3/4" O.D. single wall	Steam Heating Coil
	copper tubing designed for a maximum working
	pressure of 150 psi.		1.	Double wall tubing with a leak detection port
2.	All wetted parts including the tube sheet and baffles		2.	Alternate tubing material please specify:
3.	are non-ferrous for maximum longevity.			(Stainless Steel, 90/10 Copper-Nickel, Other)
	Heavy duty fabricated steel head with threaded NPT		3.	Fabricated steam head constructed from:
	steam and condensate connections.			(Stainless Steel, Copper Alloy, Other)
Steam Operating Controls		Operating Controls
1.	Steam operating controls are factory selected, sized,		4.	Steam controls are factory selected and sized, but
2.	piped, and tested to ensure reliable operation.		5.	shipped loose for in the field installation by others.
	All steam components are factory plumbed with			Various steam control valves are available to meet
	schedule 40 black iron pipe and ready for steam and			the specific needs of your application, please
3.	condensate connections.			specify: Self-operated type, pneumatic operated,
	High quality cast iron pilot operated steam control			electric motor operated, separate pressure
	valve modulates the flow of steam through the			reducing pilot type.
	heating coil to provide accurate water temperature		6.	Single solenoid safety system closes the control
4.	control.			valve should the water temperature in the tank
	Cast iron Y strainer with 20 Mesh screen protects the			reach the hi-limit set point. Requires 120 volt 5
	steam controls and coil from dirt and debris in the			amp electrical service.
5.	steam supply.		7.	A double solenoid safety system dumps over
	Thermostatic drip trap removes condensate from the			heated water in the storage tank to drain in
	steam supply line.			addition to closing the control valve. Requires 120
6.	Heavy duty cast iron float and thermostatic main		8.	volt 5 amp electrical service.
	condensate trap for optimum efficiency.			Dial water thermometer and pressure gauge
7.	Brass vacuum breaker and dial steam pressure			factory installed in the tank.
	gauge installed in the heating coil head.		9.	Factory wrapped and baffled steam coil with
Note: Additional steam and boiler water design literature			10.	integral pump package.
				Steam Controls to be cast steel construction.
is available in Hubbell brochures titled “ST”,“BW” and
“Heating Coils”.

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