PVI Industries PV 6619 9 Outlet Water Temperature Controls, Safety Controls, Warranty Summary

SPECIFICATION FOR DOMESTIC WATER HEATERS

Semi-instantaneous, U-tube, Hot Water Generators with Nickel-Plated Shell

And Steam as the Energy Source

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Outlet Water Temperature Controls

Inlet steam through the heat exchanger will be controlled by one or more on/off, solenoid valves that respond to an immersion thermostat. Solenoid valve(s) will fail closed to prevent a runaway situation in the event of a power interruption. The solenoid valve(s) offer a “built-in” solenoid shutoff for the inlet steam in the event of an over- temperature situation. The semi-instantaneous heater will contain enough stored water to act as a temperature buffer and will enable control of outlet water temperature to within 5°F of thermostat setting without the need for a continuously running integral circulating pump or a modulating steam valve connected to a feed-forward blending system. An over- temperature tank purge valve will not be required as standard equipment to correct for temperature swings.

The heat exchanger will be sized to obtain the required domestic water temperature and flow through the significant latent energy in steam that is released as it condenses. The heater will not need to sub-cool condensate. For maximum boiler system efficiency, condensate will return at above 200°F, eliminating the need to reheat condensate prior to re- introducing it into the boiler.

Safety Controls

As a minimum, the heater will be equipped with the following:

•automatic solenoid shutoff of inlet steam line

•an immersion operating thermostat

•an immersion temperature limiting device

•an ASME- or AGA-rated temperature and pressure relief valve

If selected, the water heater will be equipped with the following optional equipment.

____ manual-reset , temperature limiting device

____ double-solenoid, over-temperature system with tank purge valve

____ a pressure differential, tube wall breach detection and shutdown system

Warranty Summary

Heat exchanger will have a ___ one-year ____ three-year warranty. All other heater parts will have a one-year

warranty. Storage tank will have a ten-year warranty covering manufacturing or material defects, and/or the production of rusty water. If indicated here, the heater will also have a _____ first year or ____ long-life service policy, which will cover

replacement labor and freight costs under certain conditions. This summary is not a warranty. Consult warranty and policies for full details. Complete copies of all warranties and service policies, including all exclusions and conditions, will be presented to the owner as part of the submittal package.

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