Heat Controller HEV/H manual Unit START-UP and Operating Conditions, Unit and System Checkout

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Installation, Operation & Maintenance

HEV/H SERIES

Heat Controller, Inc.

 

 

 

UNIT START-UP AND OPERATING CONDITIONS

Unit and System Checkout

BEFORE POWERING SYSTEM, please check the following:

UNIT CHECKOUT

Shutoff valves: Insure that all isolation valves are open.

Line voltage and wiring: Verify that voltage is within an acceptable range for the unit and wiring and fuses/ breakers are properly sized. Verify that low voltage wiring is complete.

Unit control transformer: Insure that transformer has the properly selected voltage tap. Residential 208-230V units are factory wired for 230V operation unless specified otherwise.

Loop/water piping is complete and purged of air. Water/ piping is clean.

Antifreeze has been added if necessary.

Entering water and air: Insure that entering water and air temperatures are within operating limits of Tables 9a and 9b.

Low water temperature cutout: Verify that low water temperature cut-out on the DXM2 control is properly set. Unit fan: Manually rotate fan to verify free rotation and insure that blower wheel is secured to the motor shaft. Be sure to remove any shipping supports if needed.

DO NOT oil motors upon start-up. Fan motors are pre- oiled at the factory. Check unit fan speed selection and compare to design requirements.

Condensate line: Verify that condensate trap is installed and pitched.

HWG pump is disconnected unless piping is completed and air has been purged from the system.

Water flow balancing: Record inlet and outlet water temperatures for each heat pump upon startup. This check can eliminate nuisance trip outs and high velocity water flow that could erode heat exchangers.

Unit air coil and filters: Insure that filter is clean and accessible. Clean air coil of all manufacturing oils.

Unit controls: Verify that DXM2 field selection options are properly set. Low voltage wiring is complete.

Blower CFM and Water ∆T is set on communicating thermostats or diagnostic tool.

Service/access panels are in place.

SYSTEM CHECKOUT

System water temperature: Check water temperature for proper range and also verify heating and cooling set points for proper operation.

System pH: Check and adjust water pH if necessary to maintain a level between 6 and 8.5. Proper pH promotes longevity of hoses and fittings (see Table 3).

System flushing: Verify that all air is purged from the system. Air in the system can cause poor operation or system corrosion. Water used in the system must be potable quality initially and clean of dirt, piping slag, and strong chemical cleaning agents. Some antifreeze solutions may require distilled water.

Internal Flow Controller: Verify that it is purged of air and in operating condition.

System controls: Verify that system controls function and

operate in the proper sequence.

Low water temperature cutout: Verify that low water temperature cut-out controls are set properly

(LT1 - JW3).

Miscellaneous: Note any questionable aspects of the installation.

CAUTION!

CAUTION! Verify that ALL water valves are open and allow water flow prior to engaging the compressor. Freezing of the coax or water lines can permanently damage the heat pump.

CAUTION!

CAUTION! To avoid equipment damage, DO NOT leave system filled in a building without heat during the winter unless antifreeze is added to the water loop. Heat exchangers never fully drain by themselves and will freeze unless winterized with antifreeze.

Unit Start-up Procedure

1.Turn the thermostat fan position to “ON.” Blower should start.

2.Balance air flow at registers.

3.Adjust all valves to their full open position. Turn on the line power to all heat pump units.

4.Room temperature should be within the minimum- maximum ranges of Table 9b. During start-up checks, loop water temperature entering the heat pump should be between 30°F [-1°C] and 95°F [35°C].

5.It is recommended that water-to-air units be first started in the cooling mode, when possible. This will allow liquid refrigerant to flow through the filter-drier before entering the TXV, allowing the filter-drier to catch any debris that might be in the system before it reaches the TXV.

6.Two factors determine the operating limits of geothermal heat pumps, (a) return air temperature, and (b) water temperature. When any one of these factors is at a minimum or maximum level, the other factor must be at normal level to insure proper unit operation.

a.Adjust the unit thermostat to the warmest setting. Place the thermostat mode switch in the “COOL” position. Slowly reduce thermostat setting until the compressor activates.

b.Check for cool air delivery at the unit grille within a few minutes after the unit has begun to operate. Note: Units have a five minute time delay in the control circuit that can be bypassed on the DXM2 control board as shown below in Figure 25. See controls description for details.

c.Verify that the compressor is on and that the water flow rate is correct by measuring pressure drop through the heat exchanger using the pressure ports and comparing to Table 10.

d.Check the elevation and cleanliness of the condensate lines. Dripping may be a sign of a blocked line. Check that the condensate trap is filled

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Contents Residential Packaged Geothermal Heat Pump Table of Contents Configuration Supply AIR Options Unit NomenclatureSafety General Information Physical Data Vertical UpflowHE Vertical Upflow Dimensional Data Return Connection Standard Deluxe Filter Frame Vertical Installation Vertical Unit LocationSound Attenuation for Vertical Units Condensate Piping for Vertical UnitsHorizontal Unit Location Vertical InstallationMounting Horizontal Units Horizontal Installation Typical Closed Loop Horizontal Unit InstallationField Conversion of Air Discharge Field Conversion of AIR DischargeSide to Back Discharge Conversion Water Connection Installation GROUND-LOOP Heat Pump ApplicationsLow Water Temperature Cutout Setting DXM2 Control AntifreezeOpen Loop Ground Water Systems GROUND-WATER Heat Pump ApplicationsWater Quality Standards Water Control Valve Water Coil Low Temperature Limit SettingExpansion Tank and Pump Flow RegulationWater Quality Standards Water Quality StandardsTypical HWG Installation HOT Water GeneratorInstallation Water Tank Refill Water Tank PreparationHWG Water Piping Initial Start-UpElectrical Line Voltage General Line Voltage WiringElectrical Line Voltage HWG Wiring Electrical Power WiringPower Connection Volt OperationLow Water Temperature Cutout Selection Electrical LOW Voltage WiringThermostat Connections Taco Valve Accessory ConnectionsThermostat Electrical Thermostat Wiring Thermostat InstallationECM Blower Control Blower Performance Data ECM Blower Performance Data TableWiring Diagram DXM2 Controls Unit OperationDXM2 Layout and Connections P11Operating Limits Unit Commissioning and Operating ConditionsCommissioning Conditions Unit Starting and Operating Conditions Unit START-UP and Operating Conditions Unit Start-up ProcedureUnit and System Checkout Unit START-UP Procedure Unit START-UP ProcedureUnit Operating Conditions HE Coax Water Pressure DropHE Series Typical Unit Operating Pressures and Temperatures Unit Operating Conditions Preventive Maintenance Troubleshooting DXM2 Process Flow Chart StartFunctional Troubleshooting Fault Htg Clg Possible Cause SolutionIFC Fault Code Troubleshooting Form 410AHEV/H Series 97B0016N11

HEV/H specifications

The Heat Controller HEV/H series represents a significant advancement in heating technology, designed to provide efficient and effective climate control for both residential and commercial spaces. This innovative range of heat pumps combines cutting-edge features with user-friendly functionality to offer a reliable solution for modern heating needs.

One of the standout features of the HEV/H series is its advanced inverter technology. This system allows the heat pump to adjust its output based on the specific heating requirements of the environment. By varying the compressor's speed, the HEV/H maintains a consistent temperature while significantly reducing energy consumption. This not only lowers utility bills but also reduces environmental impact, making it a more sustainable option compared to traditional heating methods.

The HEV/H series is equipped with a high-efficiency heat exchanger, which maximizes heat transfer and enhances overall performance. This component ensures that the system can operate effectively even in colder climates, providing reliable heating throughout the winter months. Additionally, the unit’s low noise operation is designed to maintain a peaceful environment, making it suitable for bedrooms, offices, and other noise-sensitive areas.

Another notable characteristic of the HEV/H series is its smart control features. Integrated with Wi-Fi connectivity, users can conveniently manage their heating settings remotely via a smartphone app. This feature allows for customized scheduling and temperature control, ensuring optimal comfort and convenience. Users can also receive real-time notifications on energy consumption and system performance, enhancing user engagement and control.

The HEV/H series also emphasizes durability and longevity. Constructed with high-quality materials, the units are designed to withstand the rigors of daily use while requiring minimal maintenance. The incorporation of advanced filtration systems helps to improve indoor air quality by capturing dust and allergens, which is especially beneficial for individuals with allergies or respiratory issues.

In summary, the Heat Controller HEV/H series exemplifies modern heating technology with its combination of efficiency, control, and user-friendly features. Its inverter technology, high-efficiency heat exchangers, smart connectivity, and durable construction make it an outstanding choice for anyone seeking to enhance their indoor climate while being conscious of energy usage and environmental impact. Whether for a home or business, the HEV/H series is poised to deliver exceptional heating solutions tailored to diverse needs.
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