[2.2.9
Freeze Protection Thermostatic Switch
Provide switch with concealed set point, cover, and allen head screws.
Omit temperature indicator or conceal indicator within cover. Switch shall
not be adjustable below 40 degrees F. When fire protection equipment room
air temperature drops below [40] [_____] degrees F, switch contacts shall
[transfer] [close], causing a supervisory signal on fire alarm system.
Removal of switch from circuit shall cause a trouble signal on its
respective zone. Mount switch with centerline 1.5 m 5 feet above finished
floor. Provide with insulating subbase when mounting on exterior wall.
][2.2.10
Electro-Magnetic Door Holder-Releases
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NOTE: Where practical, chose first option to close
doors upon any alarm. For large buildings with many
smoke doors, consult with the EFD/EFA Fire
Protection Engineer for guidance on preferred door
closing method. Coordinate editing of this
paragraph with paragraph titled "Fire Alarm Signal
Initiation".
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BHMA A156.15. Provide where shown. The armature portion shall be mounted
on the door and shall have an adjusting screw for setting the angle of the
contact plate. Mount the electro-magnetic release on the wall or in a wall
recess behind the door. The activation of the [fire alarm system] [any
smoke detector] [a smoke detector designated for door release service]
shall release all doors on the circuit to close. Total projection of the
door holder-release shall not exceed 100 mm 4 inches. Door holders shall
not require battery backup power.
][2.2.11
Valve Tamper Switches
Provide switches to monitor the open position of valves controlling water
supply to sprinkler systems. Switch contacts shall transfer from the
normal position to the off-normal position during the first two revolutions
of the hand wheel or when the stem of the valve has moved not more than
one-fifth of the distance from its normal position. Provide switch with
tamper resistant cover. Removal of the cover shall cause switch to operate
into the off-normal position.
]2.2.12
Off-Premises Fire Alarm
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NOTE:
1. Telegraphic and radio master boxes shall be
placed in readily visible, accessible locations,
preferably on poles or pedestals between the front
of the building and the street. In mercantile,
manufacturing, and industrial districts it shall not
be necessary to travel in excess of one block or 152
m 500 feet to reach an exterior fire alarm box. In
residential areas it shall not be necessary to
travel in excess of two blocks or 244 m 800 feet to
reach an exterior fire alarm box. Schools,
hospitals, nursing homes and places of assembly
SECTION 13852N
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