Carrier 48HC Humidi-MiZerRControl Connections, Humidi-MiZer Space RH Controller

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48HC

Humidi-MiZerRControl Connections

Humidi-MiZer – Space RH Controller —

NOTE: The Humidi-MiZer is a factory installed option.

The Humidi-MiZer dehumidification system requires a field-supplied and -installed space relative humidity control device. This device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combination thermostat-humidistat control device such as Carrier’s EDGER Pro Thermidistat with isolated contact set for dehumidification control. The humidistat is normally used in applications where a temperature control is already provided (units with PremierLinkt control).

To connect the Carrier humidistat (HL38MG029):

1.Route the humidistat 2-conductor cable (field-sup- plied) through the hole provided in the unit corner post.

2.Feed wires through the raceway built into the corner post (see Fig. 31) to the 24-v barrier located on the left side of the control box. The raceway provides the UL-required clearance between high-voltage and low-voltage wiring.

3.Use wire nuts to connect humidistat cable to two PINK leads in the low–voltage wiring as shown in Fig. 34.

To connect the Thermidistat device (33CS2PPRH-01):

1.Route the Thermidistat multi-conductor thermostat cable (field-supplied) through the hole provided in the unit corner post.

2.Feed wires through the raceway built into the corner post (see Fig. 31) to the 24-v barrier located on the left side of the control box. The raceway provides the UL-required clearance between high-voltage and low-voltage wiring.

3.The Thermidistat has dry contacts at terminals D1 and D2 for dehumidification operation (see Fig. 35). The dry contacts must be wired between CTB terminal R and the PINK lead to the LTLO switch with field-supplied wire nuts. Refer to the installation instructions included with the Carrier Edge Thermidistat device (Form 33CS-65SI or latest) for more information.

% RELATIVE HUMIDITY

C09295

Fig. 32 - Accessory Field-Installed Humidistat

®

C09296

Fig. 33 - EDGE Pro Thermidistat

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing 17 Size Unit C10897 Unit Dimensional Drawing 20 and 24 Size Units C10893 Unit Dimensional Drawing 28 Size Unit C10901 Operating Weights Plan for Unit LocationRoof Mount Plan for Sequence of Unit Installation Inspect unitProvide Unit Support Roof Curb Details 17 Size Unit Roof Curb Details 20 and 24 Size Units Roof Curb Details 28 Size Unit Field Fabricate Ductwork Rig and Place UnitInstall Outside Air Hood Factory Option Horizontal Duct ConnectionPositioning on Curb Install Flue Hood and Combustion Air Hood Install Gas PipingTo assemble the outside air hood Gas Supply LineTypical 3/4-in NPT Field Supplied Piping Parts Natural Gas Supply Line Pressure RangesFactory-Option Thru-Base Connections Orifice HoleInstall External Condensate Trap and Line Field Power SupplyMake Electrical Connections Units with Factory-Installed Disconnect All UnitsPowered Convenience Outlet Wiring Field Control Wiring Units without Thru-Base ConnectionsThermostat Unit without Thru-Base Connection KitTransformer Connection for 208-v Power Supply Typical Low-Voltage Control ConnectionsHumidi-MiZerRControl Connections Humidi-MiZer Space RH ControllerTo connect the Carrier humidistat HL38MG029 To connect the Thermidistat device 33CS2PPRH-01OAT RRS Srtn PremierLinkt Factory-Option PremierLink ControllerPremierLink Wiring Schematic PremierLink Wiring Schematic with Humidi-MiZerR Supply Air Temperature SAT Sensor Field ConnectionsEconoMi$er2 PremierLink Sensor UsageSpace Sensor Mode Thermostat ModeConfigure the Unit for Thermostat Mode Space SensorsEconomizer Controls Indoor Air Quality CO2 SensorSpace Relative Humidity Sensor Installation To wire the sensorFilter Status Switch Supply Fan Status SwitchPower Exhaust output Smoke Detector/Fire Shutdown FSDConnecting CCN Bus Color Code Recommendations CCN Communication BusRecommended Cables RTU Open Control System RTU Open Multi-Protocol Control BoardRTU Open System Control Wiring Diagram RTU Open System Control Wiring Diagram with Humidi-MiZerR RTU Open Controller Inputs and Outputs Type of I/O Connection PIN Name Numbers Dedicated InputsSpace Temperature SPT Sensors RTU Open T-55 Sensor ConnectionsSpace Relative Humidity Sensor Typical Wiring Relative Humidity Sensors Space or Duct MountedDuct Relative Humidity Sensor Typical Wiring Connecting Discrete InputsCommunication Wiring Protocols GeneralLocal Access RTU Open TroubleshootingOutdoor Air Enthalpy Control LEDsDifferential Enthalpy Control Wiring Return Air Sensor Tube InstallationSmoke Detectors To install the return air sensor sampling tube Unit Wire/Fuse or Hacr Breaker Sizing DataSmoke Detector Test Magnet Additional Application DataUnit NOM IFM FAN Motor Exhaust Unbalanced 3-Phase Supply Voltage Adjust Factory-Installed Options Install AccessoriesEconoMi$er IV Occupancy Switch Pre-Start and Start-Up48HC Catalog No 48HC---11SI

48HC specifications

The Carrier 48HC is a highly efficient rooftop HVAC unit designed for commercial applications that prioritize both performance and energy savings. This unit embodies Carrier's commitment to innovation by integrating advanced technologies and features that address the modern demands of building climate control.

One of the standout features of the Carrier 48HC is its exceptional energy efficiency. Employing the latest in variable-speed compressor technology, the unit adjusts its output based on the specific cooling needs of the space, which not only enhances comfort levels but also significantly reduces energy consumption. This feature is crucial for businesses looking to lower their operational costs while minimizing their environmental impact.

The Carrier 48HC is also equipped with a comprehensive range of control options. Through its intelligent control systems, users can utilize features such as demand ventilation, which optimizes indoor air quality while maintaining energy efficiency. The integration with building management systems (BMS) further enhances operational effectiveness, allowing real-time monitoring and adjustments from a centralized point.

Additionally, the 48HC is designed with durability in mind. Its robust construction resists harsh weather conditions and ensures long-lasting performance. The unit features advanced corrosion-resistant materials and coatings, which prolong its lifespan and reduce maintenance needs. This durability makes the 48HC a reliable choice for varying environments, whether it’s an industrial setting or a more delicate commercial space.

The unit’s compact design also deserves mention, as it facilitates easier installation on rooftops without taking up excessive space. The modular design allows for customization, enabling businesses to tailor their systems to fit specific heating and cooling requirements.

In terms of comfort, the Carrier 48HC employs efficient air distribution technology that ensures even airflow throughout the space. This greatly enhances occupant comfort by eliminating hot or cold spots, promoting a consistent indoor climate.

Finally, the 48HC complies with stringent environmental regulations and standards. With options for environmentally-friendly refrigerants, it supports businesses in their sustainability efforts while operating effectively under current regulations.

In summary, the Carrier 48HC stands out in the crowded HVAC market due to its advanced technology, energy efficiency, durability, and adaptability for commercial applications, making it a top choice for those looking to invest in a reliable and effective climate control solution.
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