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Summary of Contents for ENERVEX VHX
- Page 1 ENERVEX VHX VORTEX HEAT RECOVERY CENTER 010.4110.0619 12.19 Installation & Operating Manual READ AND SAVE THESE INSTRUCTIONS! ENERVEX Inc. P: 770.587.3238 1685 Bluegrass Lakes F: 770.587.4731 Parkway T: 800.255.2923 Alpharetta, GA 30004 info@enervex.com www.enervex.com...
- Page 2 ENERVEX equipment is designed and engineered to give long life and excellent service on the job. The electrical and mechanical devices supplied as part of the unit were chosen because of their known ability to perform; however, proper operating techniques and maintenance procedures must be followed at all times.
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Page 3: Table Of Contents
010.4110.0619 12.19 Content 1. PRODUCT INFORMATION 10. ECONOMIZER CONTROLS (HRC 80) 1.1 Function ............4 4.1 General .............22 1.2 Components .............5 1.3 Shipping ............5 1.4 Warranty ............5 2. SPECIFICATIONS AND DIMENSIONS 2.1 Dimensions and Capacities .......6 3. PRE-INSTALLATION INFORMATION ....7 4. MECHANICAL INSTALLATION 4.1 General .............8 4.2 Positioning ............8 4.3 Vertical Installation ..........9... -
Page 4: Product Information
010.4110.0619 12.19 1. PRODUCT INFORMATION 1.1 FUNCTION The Single Row VHX, Vortex Heat Recovery Center, is a unique and highly efficient economizer system with a built-in bypass. It is a fully packaged light weight product with a round configuration for ease of installation. The all 316L... -
Page 5: Components
Fig 1 The VHX product line units are shipped on pallets. To remove 1. Economizer housing the economizer, first position the unit, while either still in the 2. -
Page 6: Specifications And Dimensions
394 / 179 486 / 220 578 / 262 Length in/mm ID in/mm OD in/mm Flange 1/2” U-Band Flange 16 Bolt Hole Flange 1) NPT adaptors available from ENERVEX, Inc. Larger sizes available upon request; contact ENERVEX, Inc. with specifications. -
Page 7: Pre-Installation Information
010.4110.0619 12.19 3. PRE-INSTALLATION INFORMATION The VHX Heat Recovery Center is used with a liquid in the circuit with connections and a gas on the open side. The heat exchanger must operate in line with approved design parameters: temperatures, pressures and flow rates. -
Page 8: Mechanical Installation
In addition, it can be used for sidewall vented applications where it discharges through a wall. A condensate drain is provided with the VHX to be installed by the user. The VHX is for indoor and outdoor installation. If installed outdoors, steps must be take to prevent freezing of water in the VHX housing and pipes (see Section 4.3). -
Page 9: Vertical Installation
010.4110.0619 12.19 of the combustion source, in effect forming the first section of the exhaust duct, with the existing exhaust stack lifted or cut to accommodate the economizer. Structural integrity of the building should be verified (by others) prior to installing an economizer by suspending from the ceiling. 4.3 VERTICAL INSTALLATION For vertical flow units it is recommended that the unit be completely supported either by a floor support structure or by... -
Page 10: Connection To Chimney (Bolted Flange)
The VHX is equipped with a modulating by-pass damper and flow control system. Fig. 6 shows the inlet of the VHX and the damper in “open” and “closed” positions. The exhaust flow enters through the top part of the housing, where it is forced down through the heat module as long as the damper is closed (default position). -
Page 11: General
Proper feedwater treatment is a major factor in preventing economizer failure. Only low sulfur fuels should be used with the VHX. if fuels other than natural gas are used, there is a risk of “cold end corrosion” when the entering water temperature falls... -
Page 12: Mounting Of Temperature Sensor
Manual for HRC 80 Heat Exhanger Controller. Fig 12 5.5 SPECIAL INSTALLATION CONSIDERATIONS The VHX economizer may be installed inside or outside with appropriate drain piping installed for shutdown periods. If there is a remote chance the temperatures outside might fall below freezing it is recommended that care be taken to avoid potentially freezing the heat transfer core. - Page 13 010.4110.0619 12.19 it could freeze the plates and cause a rupture, ultimately destroying the economizer. For potential freezing applications where the water flow might stop, a manual system shut down routine should be incorporated. It is not recommended to use solenoid type drain valves for auto draining in subzero environments unless absolutely necessary.
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Page 14: Electrical Installation
6.2 MODULATING BYPASS DAMPER The only electrical part of the VHX is the actuator serving the Modulating Bypass Damper. The actuator can be controlled by a 0-10VDC signal either from an ENERVEX HRC80 or... -
Page 15: Startup And Configuration
Upon cold startup of a full boiler, provisions must be made to ensure water flow through the VHX. Assure sufficient flow to prevent any unwarranted temperature and pressure buildup within the liquid side of the heat module. -
Page 16: Maintenance And Troubleshooting
010.4110.0619 12.19 8. MAINTENANCE AND TROUBLESHOOTING 8.1 GENERAL The VHX economizer is virtually maintenance free. Nevertheless, periodic inspections will ensure trouble-free operation and long equipment life. A routine physical inspection of the heat transfer core area will depend on the conditions of temperature and the quality of combustion within the flue gas stream. - Page 17 010.4110.0619 12.19 In such cases, the module can always be cleaned by: • Circulating a cleaning liquid (CIP – Cleaning In Place). • A solution of 5% phosphoric acid or 5% oxalic acid in water is recommended to chemically clean the channels. •...
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Page 18: Application Examples
010.4110.0619 12.19 9. APPLICATION EXAMPLES 9.1 PREHEATING BOILER RETURN WATER 9.2 PREHEATING CIRCULATING FEED WATER... -
Page 19: Preheating Boiler Make Up Water
010.4110.0619 12.19 9.3 PREHEATING BOILER MAKE UP WATER 9.4 PREHEATING STEAM BOILER FEEDWATER WITH MODULATING FEED WATER VALVE... -
Page 20: Circulating Make Up Water Heating
010.4110.0619 12.19 9.5 CIRCULATING MAKE UP WATER HEATING 9.6 CONDENSATE RETURN HEATING... -
Page 21: Calorifier Heating Loops
010.4110.0619 12.19 9.7 CALORIFIER HEATING LOOP 9.8 PROCESS WATER HEATING... - Page 22 10. ECONOMIZER CONTROLS (HRC 80) 10.1 GENERAL The HRC80 is a totally integrated heat recovery control system esigned to work with the ENERVEX VHX Heat Recovery systems. It monitors inlet and outlet water and flue temperatures and limits the maximum water outlet temp to a desired level while maximizing heat recovery and efficiency.
- Page 23 010.4110.0619 12.19 Notes...
- Page 24 ENERVEX Inc. P: 770.587.3238 1685 Bluegrass Lakes F: 770.587.4731 Parkway T: 800.255.2923 Alpharetta, GA 30004 info@enervex.com www.enervex.com...
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