valutazioni - 3, GPA: 3.7 ( )

Produttore : Carrier File Size : 613.71 kb File Nome : Lingua di insegnamento:

Units include space and coil tracks downstream of evaporator for field or factory installation of auxiliary devices. PRODUCT INTEGRATED CONTROL FEATURES STANDARD CONTROL FUNCTIONS Unit compatible with CARRIER COMFORT NETWORK or stand alone operation. Constant Volume or Variable Air Volume control. Four to six stages of compressor unloading possible. Supply fan control based on occupancy schedule using 365-day electronic timeclock with holiday scheduling. Time schedule override through the space temperature sensor provided with the unit. Compatible with 37H and 45 Series PIC terminals to form a Digital Air Volume system (DAV). Building pressurization control in conjunction with modulating power exhaust option. Supply duct static pressure controlled through inlet guide vanes or field or factory supplied inverter. Head pressure control to .20° F. Head pressure controlled by saturated condensing temperature, low ambient control utilizes Motormaster. II fan cycling. Lead-lag compressor control to even out run time. Self-diagnostic run test confirms control and component operation at unit commissioning. Self-diagnostic troubleshooting codes indicate the reason unit tripped to expedite unit repair. Codes expand to English Text. Control of a two-speed supply fan motor on CV applications. (Two- speed motor available on Special Order.) Building Purge Mode flushes building interior with outdoor air to remove contaminants before occupancy. Adaptive Optimal Start minimizes the amount of time and energy required before entering the occupied mode. Unoccupied Mode Free Cooling — units with optimal economizer will utilize free cooling whenever possible to maintain the unoccupied set point. Input/Output of data and monitoring of alarms can be done remotely using Building Supervisor, or at the unit using the accessory HSIO module. Delayed Mechanical Cooling — units with optional economizer will utilize cooling to cool the space 3 degrees below the occupied set point to delay the need for mechanical cooling. ADDITIONAL CONTROL FUNCTIONS AVAILABLE THROUGH FACTORY-INSTALLED ‘‘OPTION MODULE’’ Provides a discrete output with occupancy control for use as specified by the customer. Controls a field installed humidifier usinga4to20mA or 2-stage output. Requires accessory humidity sensor. Smoke Control functions (Building Pressurization and Smoke Purge) are provided through software. Terminals are provided to interface with field supplied smoke/fire panel. Providesa4to20mA output to direct or reverse proportional hot water control valve for field supplied hydronic heating coil. Requires a field supplied freezestat to protect coil. Factory installed suction and discharge pressure transducers and suction temperature thermistors allow remote monitoring of these parameters and superheat to provide enhanced remote diagnostics. Differential enthalpy control can be provided using field installed accessory humidity sensors. Economizer control field configurable to: — Maintain a min...

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