PART I - GENERAL
Description of System

• The photo diode lighting control system shall control the lighting loads affected by outdoor ambient light.
• The system shall include, but not be limited to the following:
  

  » Override switch from the lighting controller. » Override from RLP lighting controller. » Override control from the Building Automation System. » Roof or Room mounted photo diode sensors. » Controllers with set point that can be calibrated.

• Control System: All system components shall be standard manufactured items supplied by one manufacturer. Replacement components shall be readily available "off the shelf" locally stocked.
• The Photo Diode lighting system is based on the Day Light Control system. All substitutions shall require review by the Electrical Engineer and shall meet and exceed the specifications without exception

Sensors

• Locations
  

  » Indoor sensors shall be ceiling mounted facing the floor in the area where the lighting is controlled. » Outdoor sensors shall be mounted on the roof or high on an exterior wall with a clear view of the northern sky. » Skylight sensors shall be mounted in the skylight facing up. » Atrium sensors shall be mounted in the area being controlled, facing up.

• Provide three conductor #18 awg shielded wire to each sensor from the control module.
• The sensor shall be a photo diode sensor with a focus on the work area and be calibrated from 1 to 100 foot candles or as required for the application.

Controller

• The digital photo diode controller shall be mounted in the electrical room.
• Power for the controller shall be supplied by 120 volt of 227 volt source converted to 24 volt AC power.
• The controller shall have a H-O-A override switch for manual control and a terminal for a remote override switches.
• The control shall be completely adjustable for all foot candle set points. The "ON" and "OFF" set points shall be protected with a preset "dead-bang" setting from 2 to 30%.
• Pilot lights shall be provided for "ON" and "OFF" status of each control setting.
• The controller shall have a one line, 16 character alpha/numeric LCD display to display and control the following:
  

  » Input levels (actual foot candle readings). » Set point levels for "ON" and "OFF". » Operation mode (room, skylight, exterior, etc.). » HID timer (0-30 minutes). » Cloud filter (0 to 5 minutes). » Override timer (0 to 120 minutes). » Simulate mode. » Pulse or maintained mode. » Select sensor calibration (500, 1000, 5000, 10000, foot candles). » Number of control levels. » Skylight to room scaling factor. » Load shedding and load rotation (option).

Inputs (option)

• Override remote pushbuttons with 0 to 120 minutes automatic "ON" delay timers (adjustable).
• Time clock interface (time clock-on / photo diode-off or photo diode-on / time clock-off).
• Remote H-O-A and pilot light indicators.

PART III - PROGRAMMING
Programming

• Contractor shall be responsible for providing factory trained and authorized field engineer to calibrate base set point for each controller and interface programming requirements for the RLP interface.
• Contractor shall provide a second field trip to adjust all set points after the tenant has moved in. The adjustment shall consider all tenant furnishing.

PART IV - TRAINING

• The contractor shall arrange with the tenant or building owner to attend a 4 hour training session. The training session shall provide the owner or tenant with the ability to adjust the controller for set points different from the base set points.
• Two weeks prior notification is required to arrange start-up and training. The contractor shall be responsible for any additional arrangements and charges if the project is not ready for start-up and training as scheduled.

PART V - WARRANTY

• A warranty shall be for a period of one (1) year from the date of start-up or 18 months from the ship date which ever is arrived at first.