Product Details
7 FACTORY OPTIONS AND/OR ACCESSORIES (cont.) Optional Humidi- -MiZer Adaptive Dehumidification System Carrier’s Humidi- -MiZer adaptive dehumidification system is an all- -inclusive factory- -installed option that can be ordered with any WeatherMaker 50TC- -04- -16 rooftop unit. This system expands the envelope of operation of Carrier’s WeatherMaker rooftop products to provide unprecedented flexi bility to meet year - -round comfort conditions. The Humidi- -MiZer adaptive dehumidification system has the industry’s only dual de humidification mode setting. The Humidi- -MiZer system includes two new modes of operation. The WeatherMaker 50TC- -04- -16 rooftop coupled with the Humidi- -MiZer system is capable of operating in normal design cooling mode, subcooling mode, and hot gas reheat mode. Normal design cooling mode is when the unit will operate under its normal sequence of operation by cycling compressors to maintain comfort conditions. Subcooling mode will operate to satisfy part load type conditions when the space requires combined sensible and a higher proportion of latent load control. Hot Gas Reheat mode will operate when outdoor temperatures diminish and the need for latent capacity is required for sole humidity control. Hot Gas Reheat mode will provide neutral air for maximum dehumidification operation. 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 2010 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 1- -speed indoor fan motor systems, Carrier’s SA V system can save substantial energy, 25%+*, versus 1- -speed indoor fan motor systems. 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 electromechanical 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 performance requirements. In either case, once set up, the VFD will automatically adjust the speed between the cooling stage operations . *Data based on .10 ($/kWh) utilizing Carrier’s HAP 4.6 simulation software program Motormaster 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 will either cycle the outdoor fan motors or operate them at reduced speed to maintain the unit operation, depending on the model. Hinged Access Panels Allows access to unit’s m ajor components with specifically designed hinged access panels. Panels are: filters, control box, fan motor an d compressor. Winter Start Kit The winter start kit by Carrier extends the low ambient limit of your rooftop to 25 _F( - - 4_C). The kit bypasses the low pressure switch, preventing nuisance tripping of the low pressure switch. Other low ambient precautions may still be prudent. 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.
Specifications
- Brand: CARRIER
- Model: 50TCQD04
- Color: Black
- Manufacturer: CARRIER