Specifications - Lord and Son Construction, Inc.

DIRECT DIGITAL CONTROL (DDC) HARDWARE). Potentiometers shall be of the
thumb wheel or sliding bar type. Momentary Contact Push-Buttons may include
an adjustable timer for their output. User input devices shall be labeled
for their function.
2.12 MULTIFUNCTION DEVICES
Multifunction devices are products which combine the functions of multiple
sensor, user input or output devices into a single product. Unless
otherwise specified, the multifunction device shall meet all requirements of
each component device. Where the requirements for the component devices
conflict, the multifunction device shall meet the most stringent of the
requirements.
2.12.1 Current Sensing Relay Command Switch
The Current Sensing Relay portion shall meet all requirements of the Current
Sensing Relay input device. The Command Switch portion shall meet all
requirements of the Relay output device except that it shall have at least
one normally-open (NO) contact.
2.12.2 Thermostats
Thermostats shall be multifunction devices incorporating a temperature
sensor and a temperature indicating device. Thermostats shall not contain
mercury (Hg). In addition, the thermostat shall have the following as
specified and shown:
a. A User Input Device which shall adjust a temperature setpoint output.
b. A User Input Momentary Contact Button and an output indicating zone
occupancy.
c. A three position User Input Switch labeled to indicate heating, cooling
and off positions ('HEAT-COOL-OFF' switch) and providing corresponding
outputs.
d. A two position User Input Switch labeled with 'AUTO' and 'ON' positions
and providing corresponding outputs.
e. A multi-position User Input Switch with 'OFF' and at least two fan
speed positions and providing corresponding outputs.
2.13 DIRECT DIGITAL CONTROL (DDC) HARDWARE
2.13.1 General Requirements
All DDC Hardware shall meet the following requirements:
a. It shall incorporate a "service pin" which, when pressed will cause the
DDC Hardware to broadcast its 48-bit NodeID and its ProgramID over the
network. The service pin shall be distinguishable and accessible.
b. It shall incorporate a light to indicate the device is receiving power.
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