Envision Peripherals Geothermal Indoor Split Heat Pumps Closed Loop Ground Source Systems

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P/T Plugs
Vibration Absorbing Pad or Air Pad
Rubber Hose Connector Kit CK4L or CK4S
DHW Out
DHW In
Flow Center
Electrical Supply
Lineset
To Air
Handler
Disconnect
Insulated
GeoLink
Flow Center
Thermostat Wire From Air Handler
To Loop
Figure 7: Typical Split System Application Closed Loop - Earth Coupled

ENVISION SERIES INSTALLATION MANUAL

Closed Loop Ground Source Systems

Note: For closed loop systems with antifreeze protection, set SW2-2 to the “loop” position (see table on page 21).

Once piping is completed between the unit, pumps and the ground loop (see figure below), final purging and charging of the loop is required. A flush cart (or a 1.5 HP pump minimum) is needed to achieve adequate flow velocity in the loop to purge air and dirt particles from the loop itself. Antifreeze solution is used in most areas to prevent freezing. Flush the system adequately to remove as much air as possible then pressurize the loop to a static pressure of 40-50 PSI (summer) or 50-75 PSI (winter). This is

normally adequate for good system operation. Loop static pressure will fluctuate with the seasons. Pressures will be higher in the winter months

than during the cooling season. This fluctuation is normal and should be considered when initially charging the system.

After pressurization, be sure to remove the plug in the end of the loop pump motor(s) (if applicable) to allow trapped air to be discharged and to ensure that the motor housing has been flooded. Ensure that the

loop pumps provide adequate flow through the unit(s) by checking the pressure drop across the heat exchanger and comparing it to the unit capacity data in the specification cata- log. Usually 2.5 to 3 GPM of flow per ton of cooling capacity

is recommended in earth loop applications.

Multiple Units on One Flow Center

When two units are connected to one loop pumping system, pump control is automatically achieved by connecting the SL terminals on connector P2 in both units with 2-wire thermostat wire. These terminals are polarity dependant (see Figure 8). The loop pump(s) may be powered from either unit, whichever is more convenient. If either unit calls, the loop pump(s) will automatically start. The use of two units on one flow center is generally limited to a total of 20 GPM capacity.

Figure 8: Primary/Secondary Hook-up

Envision to Envision

Envision to Envision

Envision to

Microprocessor Units

Microprocessor Units

Electromechanical Units

Dual Capacity Envision Unit #1

Shut

C

C

SL1

SL1

Down

 

 

 

In

Out

With pump

 

 

 

 

wired to Unit 1

 

 

 

With pump

 

 

 

 

wired to

 

 

 

 

 

Unit 2

 

 

 

 

 

 

 

 

 

 

 

Shut

C

C

SL1

SL1

Down

In

Out

Envision Unit #2 Dual Capacity

Single Speed

Envision Unit #1

Shut

C

C

SL1

SL1

Down

 

 

In

Out

With pump wired to Unit 1

With pump wired to Unit 2

Shut

C

C

SL1

SL1

Down

In

Out

Envision Unit #2

Single Speed

Envision Unit #1

Shut

C

C

SL1

SL1

Down

 

 

 

 

In

Out

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C S

To Electromechanical Unit

12

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Contents Envision Series Geothermal Indoor Split Heat Pumps 410A Refrigerant Ton Single Speed Ton Dual CapacityPhysical Characteristics Model NomenclatureTable of Contents General Installation Information Equipment Selection Utilizing Existing Coil or Air HandlerAir Handler Installation Connection to Air CoilDual Fuel Systems Water Piping Swivel Connections Residential UnitsAir Handler Coil Data Line Set SizesEnvision Matching Air Coil Surface Rows TubeOpen Loop Well Water Systems Solenoid ValveSolenoid Wiring Water QualityClosed Loop Ground Source Systems Multiple Units on One Flow CenterDesuperheater Connections Water Tank PreparationPlumbing Installation Desuperheater StartupThermostat Wiring ElectricalGeneral Electrical DataWiring Schematics 24V Accessory relay see SW2 3 for description of operationHp Total Microprocessor Control Cooling Operation Fan G onlyLockout Conditions Operation Logic Data STG1 STG2 STG3 Emerg Single Speed UnitsDIP Switch Settings Freeze Sensing SettingPosition Description System Service RefrigerationLeak Testing System EvacuationInitial System Charge Calculation Charging the SystemDetermining Subcooling Pressure/Temperature Coversion Chart for R-410A Unit Operating Parameters Single Speed ModelsDual Capacity Models Before Powering Unit, Check The Following Unit StartupStartup Steps Final Evaluation Unit Startup/Troubleshooting Heating Cycle AnalysisPressure Drop and Recommended Flow Rates Single SpeedDual Capacity Troubleshooting LED Definitions and DiagnosticsStandard Microprocessor Controls Refrigerant SystemsPreventive Maintenance Replacement ProceduresPhysical Dimensions Envision NZ Split Dimensional DataInstallation Notes

Geothermal Indoor Split Heat Pumps specifications

Envision Peripherals has established itself as a leader in the energy-efficient heating and cooling market with its advanced geothermal indoor split heat pumps. These systems are designed to utilize the earth's stable underground temperature as a renewable energy source, resulting in remarkable performance and sustainability.

One of the main features of Envision Peripherals geothermal indoor split heat pumps is their exceptional energy efficiency. With the ability to achieve a coefficient of performance (COP) exceeding 4.0, these heat pumps provide four units of heating or cooling for every unit of electricity consumed. This level of efficiency significantly reduces operational costs and lowers environmental impact, making them an ideal choice for eco-conscious consumers.

The technology employed in these systems emphasizes reliability and flexibility. The heat pumps are equipped with variable speed compressors, allowing them to adjust the heating and cooling output based on the current demands of the space. This results in consistent indoor temperatures and enhanced comfort. Moreover, the systems can seamlessly integrate with existing HVAC infrastructures, offering versatile installation options for residential and commercial applications.

Another characteristic that sets Envision Peripherals geothermal systems apart is their dual functionality. These units not only provide heating during the colder months but also excel in cooling during hot weather conditions. The geothermal heat pumps extract heat from the indoor air and transfer it to the ground, ensuring an efficient cooling process without the need for traditional air conditioning systems.

Durability and low maintenance are key aspects of Envision Peripherals heat pumps. Constructed with high-quality materials and advanced engineering, these systems are built to withstand varying environmental conditions. They feature a closed-loop system that minimizes wear and tear, reducing the frequency of repairs and providing homeowners and businesses with peace of mind.

In addition, Envision Peripherals emphasizes eco-friendliness. The use of renewable geothermal energy diminishes dependence on fossil fuels, contributing to a more sustainable living and working environment. Their commitment to sustainability aligns with global efforts to reduce greenhouse gas emissions and combat climate change.

In summary, Envision Peripherals geothermal indoor split heat pumps deliver exemplary energy efficiency, advanced technology, and a range of benefits, including dual functionality and reduced environmental impact. As the demand for sustainable heating and cooling solutions continues to grow, these systems represent a leading choice for consumers seeking comfort and energy savings.
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