electrical spaces, or in occupied space ceilings in accordance with
manufacturer's recommendations and as indicated on contract documents.
Provide control devices to be installed in piping and ductwork with
required gaskets, flanges, thermal compounds, insulation, piping, fittings,
and manual valves for shutoff, equalization, purging, and calibration.
Certify that installation of control system is complete and technical
requirements of this section have been met.
3.1.1
Sensors
Provide sensors in locations to sense the appropriate condition. Install
sensor and transmitter where easily accessible and serviceable without
special tools. Sensors shall be calibrated to the accuracy specified in
the contract, and operate correctly when installed. Do not install sensors
designed for one application in the place of another application (e.g.,
replacing a duct sensor with a room sensor).
3.1.1.1
Room Sensors
Provide on interior walls to sense average room conditions. Avoid
locations which may be covered by office furniture. Do not mount room
sensors on exterior walls if other locations are available. Mount
centerline of sensor 1 1/2 meters 5 feet above finished floor.
3.1.1.2
Duct Temperature Sensors
Provide sensors in ductwork in general locations as indicated. Select
specific sensor location within duct to accurately sense appropriate air
temperatures. Locate sensor connection boxes in position not obstructed by
ducts or equipment. Install gaskets between sensor housing and duct wall.
Seal duct and insulation penetrations. Install duct averaging sensors
between two rigid supports in serpentine position to sense average
conditions. Sensor shall have a total minimum length of 825 mm per square
meter one linear foot per 4 square feet of duct area. Sensor shall be
mounted a minimum of 80 mm 3 inches from outside wall surface. Thermally
isolate temperature sensing elements from supports.
Provide duct access
doors to averaging sensors.
3.1.1.3
Immersion Temperature Sensors
**************************************************************************
NOTE: Indicate pipe size increases for thermowells
in small diameter piping.
**************************************************************************
Provide thermowells for sensors measuring temperatures in liquid
applications or pressure vessels. Locate wells to sense continuous flow
conditions. Do not install wells using extension couplings. Where piping
diameters are smaller than the length of the wells, provide wells in piping
at elbows to effect proper flow across entire area of the well. Wells
shall not restrict flow area to less than 70 percent of pipe area.
Increase piping size as required to avoid restriction. Temperature sensors
shall be installed in thermowells with thermal transmission material to
speed the response of temperature measurement. Provide thermowells with
sealing nuts to contain thermal transmission material.
3.1.1.4
Strap-on Temperature Sensors
Strap-on temperature sensors, using helical screw stainless steel clamps,
SECTION 15901N
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