Project Name
Project Number
TEMF
Statement of Work
UFC 4-214-02, 24 Jul 03
requirements specified above. Insulation at control and piping connections thereto shall extend
25.4 mm minimum over the auxiliary drain pan. Filters shall be of the fiberglass disposable type,
25.4 mm thick. Filters in each unit shall be removable without the use of tools. Motors shall be
of the permanent split-capacitor type with built-in thermal overload protection, directly connected
to unit fans. Motor switch shall be two or three speeds. In lieu of the above fan speed control, a
solid-state variable-speed controller having a minimum speed reduction of 50 percent may be
provided. Motors shall have permanently-lubricated or oilable sleeve-type or combination ball
and sleeve-type bearings with vibration isolating mountings suitable for continuous duty.
10-6.2
Variable air volume terminal unit. Units shall be pressure independent type. Unit
enclosures shall be constructed of galvanized steel not lighter than 22 gauge or aluminum sheet
not lighter than 18 gauge. Units shall be internally insulated with factory mounted controls. Unit
air volume shall be factory preset and readily field adjustable without special tools. Heating
coils shall be provided. Filters shall be provided when air is recirculated. Acoustic performance
of the terminal units shall be based upon units tested according to ARI 880. Acoustical lining
shall be according to NFPA 90A.
10-6.2.1 Constant volume type. Terminal units shall contain within the casing, a mechanical
or pneumatic constant volume regulator. Volume regulators shall control air delivery to within
plus or minus 5 percent of specified air flow subjected to inlet pressure from 18 to 150 Pa.
10-6.2.2 Variable volume type. Terminal units shall be provided with a calibrated air volume
sensing device, air valve or damper, actuator, and accessory relays. Units shall control air
volume to within plus or minus 5 percent of each air set point volume as determined by the
thermostat with variations in inlet pressures from 18 to 150 Pa. Internal resistance of units shall
not exceed 10 Pa at maximum flow range. External differential pressure taps separate from the
control pressure taps shall be provided for air flow measurement with a 0 to 25 Pa range. Unit
volume controller shall be normally [open] [closed] upon loss of pneumatic pressure.
10-6.2.3 Fan-powered type. Terminal units shall be provided with a calibrated air volume
sensing device, air valve or damper, actuator, fan and motor, and accessory relays. Units shall
control primary air volume to within plus or minus 5 percent of each air set point as determined
by the thermostat with variations in inlet pressure from 18 to 150 Pa. Unit fan shall be
centrifugal, direct-driven, double-inlet type with forward curved blades. Fan motor shall be
either single speed with speed controller or three-speed, permanently lubricated, permanent
split-capacitor type. Fan/motor assembly shall be isolated from the casing to minimize vibration
transmission. Fan control shall be factory furnished and wired into the unit control system. A
factory-mounted pressure switch shall be furnished to operate the unit fan whenever pressure
exists at the unit primary air inlet or when the control system fan operates.
10-6.3
Dual duct terminal unit. Unit enclosures shall be constructed of galvanized steel not
lighter than 22 gauge or aluminum sheet not lighter than 18 gauge. Units shall be internally
insulated with factory mounted controls. Units shall be provided with hot and cold inlet valve or
dampers. Dampers shall be controlled in unison by single or dual actuators. Unit shall control
delivered air volumes within plus or minus 5 percent with inlet air variations from 25 to 200 Pa in
either duct. Mixing baffles shall be included with the unit casing. Cabinet and closed duct
leakage shall not exceed 2 percent of maximum rated air volume. Unit air volume shall be
factory preset and readily field adjustable without special tools. Acoustic performance of the
terminal units shall be based upon units tested according to ARI 880. Acoustical lining shall be
according to NFPA 90A.
SOW-90
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