APC UCCS Temperature Control specifications 15950-24

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2.Line-voltage thermostats shall be UL-listed, SPDT, SPST, or DPST with contact rat- ing suitable for application, maximum 2F differential.

3.Low-voltage thermostats shall be single or multi-stage heating and/or cooling type as required by application.

a.Combination heating/cooling thermostats shall have independent adjustments for heating and cooling setpoints and shall not allow setpoint cross-over.

b.Provide individual heat or cooling anticipator for each control stage. Anticipator shall be matched to connected load, or shall be adjustable.

c.Microprocessor-based programmable type thermostats, when used, shall not lose time or program on power failures of 12 hours or less.

4.Provide locking enclosures/guards for all thermostats located in public areas such as lobbies, corridors, gyms, cafeterias, classrooms, auditoriums, pools, theaters, stores, warehouses, garages, etc.

B.Room Humidistat:

1.All wall-mounted room humidistats shall have locking covers with concealed setpoint adjustment, minimum range 30-60% RH. Omit humidity indicator when possible.

2.Provide metal guards with security screws for all humidstats located in public areas such as lobbies, corridors, gyms, cafeterias, classrooms, auditoriums, pools, theaters, stores, warehouses, garages, etc.

C.Duct, Immersion, and Outdoor Thermostats:

1.Provide single or multistage type with contact arrangement and rating suitable for application. Line voltage units shall be UL-listed.

2.Sensing element shall be liquid-filled, remote-bulb type or bi-metal type as required.

a.Remote bulb type shall have sufficient capillary lengths to allow mounting of thermostat at convenient location for adjustment.

b.Provide separable wells for immersion applications.

c.Provide sun shields for outdoor sensing bulbs.

d.Provide ambient temperature compensation where thermostat body is subjected to outdoor ambient temperature variations.

3.Individual stage differential -2F maximum (fixed). Provide adjustable differential type when thermostat is used for capacity control of DX refrigeration or to cycle fans.

D.Duct Humidistats:

1.Shall be line or low-voltage type utilizing non-organic sensing element. Contact

JANUARY 2008

UCCS STANDARDS

15950-24

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Contents Uccs Temperature Control Specifiers Guide Section Controls Part 1 General Special Conditions Work Included Drawings and Specifications DefinitionsSubmittal Data and Shop Drawings 15950-6 15950-7 Project Record Documents Demonstration and Training Warranty Quality Assurance Ownership of Proprietary MaterialPart 2 Products Manufacturers 15950-13 15950-14 Duct-mounted Uccs to add preferred manufacturer here 15950-16 AIR Tubing and Control Wiring Control Valves15950-18 Local Control Panels Compressed AIR Supply Pneumatic Actuators and Positioners Pneumatic 15950-22 15950-23 15950-24 SOLID-STATE Sensing Devices Transmitters Solid State15950-26 Auxiliary Devices Electric Actuators Electric Safety Controls Part 3 Execution CONTROL-AIR PipingControl Piping Liquids Control Wiring NET Controllers SCX 920 LCX 810, TCX 850, LCX 800I ALL Infinity ControllersInstallation and Setup Requirements 15950-34 Control Device Locations Control Panels IdentificationCleanup TestingProtection 15950-38 Control Execution General Workstation Programming 15950-41 DDC Software END of Section
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