Vapor Power HWR Series, Instruction Manual

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Page 5 of 16
Vapor Power International LLC
551 S. County Line Road, Franklin Park, Il 60131
Phone: 630-694-5500 Fax: 630-694-2230
2.0 PLUMBING INSTALLATION
2.1 SUPPLY AND RETURN LINES
Connect supply piping to the water outlet at top of the boiler. The placement
of a temperature sensor in this line close to the boiler is recommended to later
monitor proper system operation.
Make the return connection to the water inlet at the rear of the boiler.
NOTE: IT IS RECOMMENDED THAT ALL PIPING BE CHECKED FOR LEAKS
BEFORE INSULATING .
NOTE: SYSTEM MAKE-UP WATER IS NORMALLY INTRODUCED AT OR NEAR
THE EXPANSION TANK.
2.2 SAFETY RELIEF VALVE(S)
An ASME-approved safety relief valve (required by the ASME code to
prevent system overpressure) is supplied with the boiler. This valve should
be factory set at or below maximum working pressure of the boiler as stated
on the boiler nameplate.
NOTE: THE SYSTEM OPERATING PRESSURE MAY BE LIMITED BY THE SYSTEM
COMPONENTS OTHER THAN THE BOILER, IT IS, THEREFORE
ADVISABLE TO CHECK THE SAFE WORKING PRESSURE OF ALL
COMPONENTS IN THE SYSTEM AND, IF NECESSARY, REPLACE THE
SAFETY VALVE WITH A VALVE SET AT A LOWER PRESSURE, BUT
SUFFICIENT CAPACITY (3500 x KW = BTU’s/HR REQ’D) TO ASSURE
COMPLETE SYSTEM PROTECTION.
The discharge outlet of the relief valve should be piped to within 6” of the
floor or to a safe point of discharge where no injury to persons could result
from an unexpected discharge of hot water from the valve.
2.3 EXPANSION TANK
An expansion tank must be provided to accommodate the increase in volume
of the water in the heating system when the water is heated. The expansion