Emergency Shutdown; Prolonged Shutdown; Important Requirements For Massachusetts Installations - Watts AERCO CFR 3000 Installation And Start-Up Manual

SECTION 1: SAFETY PRECAUTIONS

1.2 Emergency Shutdown

If overheating occurs, or the gas supply fails to shut off, close the external gas shutoff valve (Figure 1-1).
NOTE: Installer must identify the emergency shutdown manual gas valve to operating personnel.
Valve
Closed
An emergency shutdown procedure addressing the following points must also be implemented:
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For automatically operated unattended boilers located in a boiler room, provide a manually
operated remote shutdown switch or circuit breaker located just inside or outside each boiler
room door. Design the system so activation of the emergency shutdown switch or circuit breaker
will immediately shut off the fuel supply to the unit(s).
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For automatically operated unattended boilers in a location other than a boiler room, provide a
manually operated remote shutdown switch or circuit breaker marked for easy identification at a
location readily accessible in the event of boiler mis-operation.
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Design the system so activation of the emergency shutdown switch or circuit breaker will
immediately shut off the fuel.
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For boilers monitored and/or operated from a continuously occupied control room, provide an
emergency shutdown switch in the control room that is hard-wired to immediately shut off the
fuel upon activation.

1.3 Prolonged Shutdown

In an emergency, turn off the electrical power supply to the boiler and close the manual gas valve
upstream from the unit. The installer must identify the emergency shut-off device.
If the unit is being shut down for one year or more, complete the instructions in Section 8.8: Shutting
Boiler Down for Extended Period in the CFR Operation-Maintenance Manual (OMM-0164). When
returning a unit to service after a prolonged shutdown, it is recommended that the instructions in Section
4: Initial Startup and Section 5: Safety Device Testing be performed to verify all operating parameters.

1.4 Important Requirements for Massachusetts Installations

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Boilers must be installed by a plumber or gas fitter licensed in the Commonwealth of Massachusetts.
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Before operation, the gas train and all connections must be leak tested using a non-corrosive soap.
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The vent termination must be located a minimum of 4 feet above grade level.
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Figure 1-1: Manual Gas Shutoff Valve
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Valve Open
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