Ex. E <br />CommStat 3™ Lead/Lag Controller <br />® <br />The CommStat 3™ Controller by Marvair is a solid <br />state control package designed to operate a fully or <br />partially redundant air conditioning system for a <br />telecommunication cabinet or shelter. The CommStat 3 <br />Controller is factory programmed with standard industry <br />set points to facilitate installation. If desired, each of <br />the set points can be quickly and easily changed in <br />the field by the installer. It can be used with Marvair’s <br />®® <br />ComPac I or ComPac II unique vertical packaged <br />wall mount air conditioners or Marvair’s environmental <br />control units. <br />The CommStat 3™ Controller provides environmental <br />control and the security demanded by the communications industry for a back-up unit. The <br />lead/lag controller insures equal wear on both air conditioners while allowing the lag unit to <br />assist upon demand. The lead/lag changeover is factory set at 7 days, but is programmable in <br />half-day increments from 1/2 to 7 days. <br />Specification/Features <br />Thermostat <br />locations in the shelter. - activated if temperature <br />P/N 80503in building drops below set <br />• Thermostat Range: <br />• Easy attachment to wall.point. Default is 41°F (5°C). <br />- cooling is 65 - 95°F <br /> High temperature alarm - <br />(18 - 35°C); default, <br />Ease of Operation <br />activated if temperature in <br />75°F (24°C). <br /> <br />Extremely easy to program or <br />building exceeds set point. <br />eating is 50 - 80°F <br />- h <br />to change factory settings. <br />Default is 95°F (35°C). <br />(10 - 27°C); default, <br /> Push button on front to swap <br /> Refrigerant pressure lockout <br />68°F (20°C). <br />lead and lag unit. <br />- activated if either air <br />rogrammable and display in <br />• P <br /> LEDs indicate: <br />conditioner is off due to <br />°F (default) or °C. <br />- control power from each air <br />a high or low refrigerant <br />• Thermostat provides two <br />conditioner. <br />pressure. <br />stages of cooling and two <br />- function (heating or <br /> Smoke detector input - when <br />stages of heating. <br />cooling) of each unit. <br />a signal is received from an <br />• Changeover differential <br />- lead unit. <br />external smoke detector, <br />between cooling and heating <br />- high or low refrigerant <br />both air conditioners are <br />is a minimum of 4°F (2.2°C). <br />pressure lockout. <br />immediately shut down. <br />Differential <br /> Digital display shows <br /> Smoke alarm output <br />temperature. <br />• On-Off differential of each <br />- activated if a signal is <br /> Comfort override push button <br />stage is adjustable from <br />received from the building's <br />temporarily overrides set <br />2 - 5°F (1 - 3°C); default, <br />smoke detector. <br />points for 90 minutes. Select <br />3°F (2°C). <br />DC Power Back up <br />either 72°F (22°C) or 77°F <br />• Interstage differential (stage <br />In the event of a loss of 24 <br />(25°C). Display blinks to <br />1 cooling to stage 2 cooling) <br />VAC power, a user provided <br />indicate Comfort Mode. <br />adjustable from 2 - 12°F <br />24 VDC or a 48 VDC can <br /> If one air conditioner <br />(1 - 7°C); default, 2°F (1°C). <br />be used to operate the <br />loses power, the other air <br />Ease of Installation <br />CommStat 3. When operating <br />conditioner automatically <br />• Wiring connections insensitive <br />on DC power, the display, the <br />advances to lead control. <br />to phasing of units. <br />user interface and the alarm <br /> Indefinite program retention <br />• 24 VAC with 24 VDC or 48 <br />outputs are functional. <br />on power loss. <br />VDC backup power. <br />Enclosure <br />Alarm Relays <br />• Easy terminal connection for <br />• Dimensions: 7-1/2” x 6” x 2” <br />thermostat wire. <br />Dry contacts can be used for <br />(190mm x 150mm x 50mm). <br />• No additional power source <br />remote alarm or notification. <br />• Doubles as junction box <br />required for operation. <br />Relays can be wired for either <br />for control wiring to air <br />• Temperature sensor built <br />Normally Open or Normally <br />conditioner. <br />into unit. Optional remote <br />Closed. <br />• Designed for use with <br />sensors available for <br /> Power - activated if 24 <br />conduit. <br />measuring temperatures, up <br />VAC is not provided to the <br />• Corrosion resistant <br />to 24 ft. from the CommStat <br />CommStat 3™ Controller. <br />polycarbonate material. <br />3™ Controller, in up to 3 <br /> Low temperature alarm <br />CommStat 3 PD, 8/10 Rev. 8 <br />P/N 01306 <br />supersedes 6/07-7 <br />