Product Details
7 FACTORY OPTIONS AND/OR ACCESSORIES (cont.) Manual OA Damper Manual outdoor air dampers are an economical way to bring in ventilation air. The dampers are available in 25% and 50% versions. Not available with Staged Air V olume (SA Vt) system. Staged Air V olume (SA V) Indoor Fan Speed System Carrier’s Staged Air V olume (SA V) system saves energy and installation time by utilizing a V ariable Frequency Drive (VFD) to automatically adjust the indoor fan motor speed in sequence with the units cooling operation. Per ASHRAE 90.1 standard section 6.4.3.10.b, during the first stage of cooling operation the VFD will adjust the fan motor to provide 2/3rd of the total cfm established for the unit. When a call for the second stage of cooling is required, the VFD will allow the total cfm for the unit established (100%). During the heating mode the VFD will allow total design cfm (100%) operation and during the ventilation mode the VFD will allow operation to 2/3rd of total cfm. Compared to single speed indoor fan motor systems, Carrier’s SA V system can save substantial energy, 25%+*, versus single speed indoor fan motor systems. *Data based on .10 ($/kWh) in an office application utilizing Carrier’s HAP 4.6 simulation software program The VFD used in Carrier’s SA V system has soft start capabilities to slowly ramp up the speeds, thus eliminating any high inrush air volume during initial start- -up. It also has internal over current protection for the fan motor and a field installed display kit that allows adjustment and in depth diagnostics of the VFD. This SA V system is available on models with 2- -stage cooling operation with electrical mechanical or RTU Open, Multi Protocol controls. Both space sensor and conventional thermostats controls can be used to provide accurate control in any application. The SA V system is very flexible for initial fan performance set up and adjustment. The standard factory shipped VFD is pre- -programmed to automatically stage the fan speed between the first and second stage of cooling. The unit fan performance static pressure and cfm can be easily adjusted using the traditional means of pulley adjustments. The other means to adjust the unit static and cfm performance is to utilize the field installed Display Kit and adjust the frequency and voltage in the VFD to required performance requirements. In either case, once set up, the VFD will automatically adjust the speed between the cooling stage operations . MotormasterR Head Pressure Controller The Motormaster motor controller is a low ambient, head pressure controller kit that is designed to maintain the unit’s condenser head pressure during periods of low ambient cooling operation. This device should be used as an alternative to economizer free cooling when economizer usage is either not appropriate or desired. The Motormaster controller will either cycle the outdoor fan motors or operate them at reduced speed to maintain the unit operation, depending on the model. Alternate Motors and Drives Some applications need larger horsepower motors, some need more airflow, and some need both. Regardless of the case, your Carrier expert has a factory installed combination to meet your application. A wide selection of motors and pulleys (drives) are available, factory installed, to handle nearly any application. Thru- -the- -Base Connections Thru- -the- -base connections, available as either an accessory or as a factory option, are necessary to ensure proper connection and seal when routing wire and piping through the rooftop’s basepan and curb. These couplings eliminate roof penetration a nd should be considered for gas lines, main power lines, as well as control power. Disconnect Switch Bracket Provides a pre- -engineered and sized mounting bracket for applications requiring a unit mounted fused disconnect of greater than 100 amps. Bracket assures that no damage will occur to coils when mounting with screws and other fasteners. (14 size only.) Supply Duct Cover This supply duct cover is required when field converting the factory standard vertical duct supply to horizontal duct supply configuration. One is required per unit. (14 size only.) Electric Heaters Carrier offers a full line of field- -installed accessory heaters. The heaters are very easy to use and install. All are pre- -engineered and certified. Thru- -the- -Base Connections Thru- -the- -base connections, available as either an accessory or as a factory option, are necessary to ensure proper connection and seal when routing wire and piping through the rooftop’s basepan and curb. These couplings eliminate roof penetration a nd should be considered for gas lines, main power lines, as well as control power. 50TCQ
Specifications
- Brand: CARRIER
- Model: 50TCQD10
- Color: Black
- Product Dimensions: 74 x 47 x 33
- Manufacturer: CARRIER