Emergency Shutdown; Prolonged Shutdown; Important - For Massachusetts Installations - Watts AERCO CFR 1500 Operation And Service Manual

SECTION 1 SAFETY PRECAUTIONS

1.2 Emergency Shutdown

If overheating occurs or gas fails to shut off, close manual shutoff valve (Figure 1-1) external to the unit.
NOTE: Installer must identify the location of the emergency shutdown manual gas valve to operating personnel.
VALVE
CLOSED
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For automatically operated unattended boilers located in a boiler room, 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, 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, an emergency
shutdown switch in the control room 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
located upstream from the unit. The installer must identify the emergency shut-off device.
If the unit is being shut down for an extended period of time, such as a year or more, follow the
instructions in Section 8.8 : Shutting Boiler Down for Extended Period.
When returning a unit to service after a prolonged shutdown, follow the instructions in Sections 4 and 5
to verify that all system-operating parameters are correct.
1.4 IMPORTANT – For Massachusetts Installations
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The boiler must be installed by a plumber or a gas fitter who is licensed within the
Commonwealth of Massachusetts.
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Prior to unit operation, the complete 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: External Manual Gas Shutoff Valve
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VALVE
OPEN
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