Trane 120 GEH manual Hot Gas Reheat option, Common Reheat Applications, Proper Hot Gas Design

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Features and Benefits

Hot Gas Reheat (option)

For space conditioning and climate con- trol, Trane provides an accurate and cost effective dehumidification control through a hot gas reheat option. This option is designed to accommodate unit sizes 012, 036, 060 and 072 through 240.

With this reheat option, the return air from the space is conditioned by the air-to-refrigerant coil, then reheated by the reheat coil to control not only the space temperature, but to also reduce the relative humidity of the space. The moisture removal capability of a specif- ic heat pump is determined by the units latent capacity rating.

When operating in the reheat mode (meaning the sensible temperature has been met in the space), the humidistat signals the reheat relay coil to energize, allowing the high pressure refrigerant gas to flow from the (1) compressor, through the (2) reheat valve, into the

(3)reversing valve, or through the (4) reheat coil for dehumidification (See Figure 19). A switching relay has been provided for the reheat application to adjust the blower motor from normal operation to low speed when hot gas reheat is energized.

Note: Trane places an air separation space between the air-to-refrigerant coil, and the reheat coil to allow for maximum moisture removal.

Common Reheat Applications

The hot gas reheat option is designed to support building applications requir- ing fresh-air ventilation units delivering unconditioned-air directly to the space. It also provides dehumidification to large latent load spaces such as audito- riums, theaters and classrooms, or any- where humidity control is a problem.

Proper Hot Gas Design

The factory installed hot gas reheat option is only available with Deluxe or ZN524 controls packages.

A high static blower motor option will be required to support the hot gas reheat option for the 1/2 through 5 ton equipment.

Water regulating valves should not be used with the hot gas reheat option. Trane places a thermal expansion valve on all water-source heat pumps, as well as ground-source heat pumps, to regu- late refrigerant flow vs. water flow, making the heat pump more efficient to run.

Water-source heat pumps with hot gas reheat should not be used as a make- up air unit.

Figure 19: Hot gas reheat heat pump option.

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Contents WSHP-PRC003-EN Introduction Contents Digits 1-3 Unit Configuration Model NumberGeneral Data Table G1 General Data GEH 006 toTable G2 General Data GEH 024 to Table G3 General Data GEH 060 toTable G4 General Data GEV 006 to Table G5 General Data GEV 024 toTable G6 General Data GEV 048 to 024 030 036 040 042Table G7 General Data GEV 072 to Table G8 General Data GEH072 090 120 150 180 240Air-to-Refrigerant Coils Table G9 GEH/GEVTable G17 GEH/GEV 060 2-compr. circuit Features and Benefits Design AdvantagesGEH 1/2 to 5-Ton Cabinet GEV 1/2 to 5-Ton CabinetFeatures Benefits GEH/GEV 6 to 20-Ton CabinetAirflow Options 1/2 to 5 ton Airflow Options 6 to 20-tonAccess Panels 12-1/2 to 20-ton Hanging Device 1/2 to 5-tonHanging Device 6 to 12-1/2-ton Drain PanSchrader Connections 1/2 to 5-ton Co-axial Water-to-Refrigerant CoilCompressor and Co-axial Coil Isolation 1/2 to 5 ton Water Connections 1/2 to 5-tonBlower Housing Blower Motor 1/2 to 5 tonBlower Motor 6 to 20 ton Air-Side FilterBoilerless Control/Electric Heat option Waterside Economizer optionCommon Reheat Applications Hot Gas Reheat optionProper Hot Gas Design Controls Controls by TraneSafety Devices Basic ControlsBasic 24 Volt Controls Stand-alone SystemDeluxe 24V Electronic Controls Deluxe ControlsSmall Building Control Deluxe 24V features include Random Start Anti-short Cycle TimerCompressor Disable Safety ControlZN510 & ZN524 Controls Tracer ZN510 & ZN524 ControlsDirect Digital Controls Waterside Economizer Entering Water Temperature SamplingWater Isolation Valves Tracer ZN controller system installation Building Control AdvantagesHanging the Horizontal Application ConsiderationsHanging Devices and Duct Attachments Condensate trap installation Condensate TrapsDistributed Pumping System 40 F/ 4 C may require antifreeze in the water loopInstallation Made Easy Service Access

Model 180 GEV, 120 GEH, Model 012 GEH specifications

Trane, a leading name in HVAC (heating, ventilation, and air conditioning) systems, offers a diverse range of models designed to cater to different cooling needs. Among its notable products are the Trane Model 180 GEV, Model 120 GEH, and Model 012 GEH. Each of these units incorporates advanced technologies and features aimed at enhancing efficiency, durability, and overall performance.

The Trane Model 180 GEV is engineered for high-performance cooling and heating applications. One of its standout features is the variable-speed compressor, which allows for precise temperature control and significant energy savings. This model also integrates advanced inverter technology that optimizes energy consumption based on the load. The robust design of the unit ensures reliability even under extreme weather conditions, making it a favored choice for commercial and industrial sectors.

In contrast, the Trane Model 120 GEH is a versatile solution that focuses on efficiency and adaptability. This model is equipped with Trane’s exclusive Climatuff compressor technology, which enhances the reliability and longevity of the system. The Model 120 GEH also includes a user-friendly touchscreen interface, allowing for convenient adjustments and monitoring of the system's performance. Enhanced filtration systems contribute to improved indoor air quality, which is a critical factor for many users.

The Trane Model 012 GEH is designed for smaller spaces but does not compromise on performance. This compact unit boasts energy-efficient operation and is equipped with Trane’s proprietary Air-Cooled Scroll Compressors that enhance its cooling capacity while maintaining low operational noise levels. Its sleek design allows for easy installation in various settings, including residential areas. The Model 012 GEH also features enhanced reliability through its robust materials, ensuring that it can withstand varying environmental conditions.

All three models emphasize Trane’s commitment to sustainability and energy efficiency. With the incorporation of eco-friendly refrigerants and advanced heat exchange technologies, users can enjoy superior cooling performance while minimizing their environmental impact. Moreover, these models are backed by Trane’s comprehensive support, providing customers with peace of mind through warranties and service options.

In summary, Trane's Model 180 GEV, Model 120 GEH, and Model 012 GEH are exemplars of modern HVAC technology, offering various features tailored to meet specific cooling and heating requirements. Each model stands out for its unique capabilities, efficient operation, and robust design, reaffirming Trane's position as a trusted leader in the HVAC industry.
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