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INSTALLATION & MAINTENANCE MANUAL
®
COBREX
STORAGE WATER HEATER
Steam Energy Source
Models (1200-7200)(L)(150-4500)A(TCX)
Installation and service must be performed by a qualified service installer, service agency or qualified plumbing
contractor.
IMPORTANT:
THIS
MANUAL
CONTAINS
INFORMATION
REQUIRED
FOR
INSTALLATION,
OPERATION
AND
MAINTENANCE OF THIS EQUIPMENT. READ AND FOLLOW THE INFORMATION IN THIS MANUAL AND ALL OTHER
PROVIDED INSTRUCTIONS, LABELS AND MARKINGS BEFORE INSTALLING, OPERATING OR SERVICING THIS
EQUIPMENT.
TO THE INSTALLER: After installation, these instructions must be given to the equipment user or left near the appliance.
SPECIAL INSTRUCTIONS TO THE OWNER: Retain this manual for future reference. These instructions contain
important information that will help you in maintaining and operating this appliance.
PVI INDUSTRIES, LLC – 3209 Galvez Ave. - Fort Worth, Texas 76111 - 1-800-433-5654
PV500-65 04/15
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Summary of Contents for PVI Industries COBREX
- Page 1 SPECIAL INSTRUCTIONS TO THE OWNER: Retain this manual for future reference. These instructions contain important information that will help you in maintaining and operating this appliance. PVI INDUSTRIES, LLC – 3209 Galvez Ave. - Fort Worth, Texas 76111 - 1-800-433-5654 PV500-65 04/15...
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Page 2: Table Of Contents
® COBREX Storage Water Heater TABLE OF CONTENTS Safety Considerations Product Description Water Heater Installation Warranty Checking Equipment Before You Install Codes Electrical Requirements Handling and Locating the Water Heater Service Clearances and Clearance to Combustibles General Piping Guidelines Potable Water Inlet and Outlet Connections... -
Page 3: Safety Considerations
® COBREX Storage Water Heater SAFETY CONSIDERATIONS WARNING: Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the unit and to replace any part of the control system and any other items affecting safe appliance operation and which has been under water. -
Page 4: Product Description
® COBREX Storage Water Heater PRODUCT DESCRIPTION ® Typical COBREX Storage Water Heater Construction 1. Heat Exchanger 9. Steam Inlet 2. Control Enclosure 10. Condensate Outlet (from trap fitting) 3. Potable Water Inlet 11. Electronic Operating Control 4. Potable Water Outlet 12. -
Page 5: Water Heater Installation
® COBREX Storage Water Heater WATER HEATER INSTALLATION 3.1 Warranty Factory warranty does not cover improper installation or operation. (See warranty for complete details). Warranty exclusions include but are not limited to failure or malfunctions resulting from: 1. Failures to properly apply, install, operate, or maintain the appliance in accordance to printed instructions. -
Page 6: Service Clearances And Clearance To Combustibles
® COBREX Storage Water Heater 6. Locate the water heater so that if water connections should leak, water damage will not occur. Water damage is not covered by the manufacturer’s warranty. 7. Locate the water heater near a suitable drain capable of accepting hot water discharge (potentially in excess of 210°F) from the water heater temperature and pressure relief valve... -
Page 7: Storage Tank Temperature And Pressure Relief Valve Piping
4.2 Storage Tank Temperature and Pressure Relief Valve Piping ® The COBREX Storage water heater storage tank is supplied with temperature and pressure relief valve(s) sized in accordance with the ANSI/ASME Boiler and Pressure Vessel Code, Section IV. The relief valve(s) must be threaded directly into the dedicated relief valve fitting(s) located near the top of the storage tank and each relief valve discharge must be separately plumbed to an appropriate floor drain. -
Page 8: Water Inlet / Outlet Connections
® COBREX Storage Water Heater ® Typical COBREX Storage Piping Arrangement 4.4 Water Inlet / Outlet Connections WARNING: All system piping to the heat exchanger plumbing must be adequately supported. Failure to provide adequate support will result in excessive loads on the heat exchanger connections that can cause hot water discharge resulting in property damage, scalding and personal injury or death. -
Page 9: Heat Exchanger Pressure Relief Valve Piping
® 2. Steam supplied to the COBREX storage water heater must not exceed 15 psi. If the steam supply pressure exceeds 15 psi, a steam pressure regulating valve must be used to limit steam supply pressure to 15 psi. -
Page 10: Connecting Pump(S) And Valve(S)
COBREX Storage Water Heater ® IMPORTANT: Inadequate drainage of condensate from the COBREX water heater will adversely affect heat transfer, will limit water heater performance and may cause unwarranted damage to the water heater. After all the connections are made it is a good practice to tighten all unions and check the electrical connections. -
Page 11: Operating And Safety Controls
® COBREX Storage Water Heater OPERATING AND SAFETY CONTROLS WARNING: Turn off all electrical service to the appliance before accessing electrical components or terminals located inside the control cabinet, junction boxes or at other points of wiring access. These terminals and components may be high voltage. Close and fasten the control cabinet cover, junction boxes and all other points of wiring access before restoring electrical service to the appliance. - Page 12 ® COBREX Storage Water Heater Control Buttons Displays and modifies the temperature set points. In programming mode, it selects a parameter or confirms an operation. Displays and modifies the energy saving (Night Time setback) settings. In programming mode, it browses the parameter codes or increases a displayed value.
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Page 13: High Water Temperature Limit Control
® COBREX Storage Water Heater LED Display Alarm Messages Alarm messages are displayed in the upper LED readout and alternate with the default display. An alarm LED ICON is also illuminated. ALARM RECOMMENDED CAUSE RESULTS OF ALARM CONDITION MESSAGE ACTION... -
Page 14: Electronic Low Water Cut-Off (Optional)
DESCRIPTION OF OPERATION ® The COBREX storage water heater can provide potable water up to 185ºF, using steam as the energy source. If the available supply steam pressure is more than 15 psi, a steam regulating valve (available option) must be used to reduce the steam pressure. -
Page 15: Start-Up And Shutdown Procedure
® COBREX Storage Water Heater START-UP AND SHUTDOWN PROCEDURE 1. When placing the unit into operation, open relief valve to purge air from top of tank and begin to fill the tank with cold water. Check for plumbing leaks. Be sure the tank is completely filled before closing the relief valve. -
Page 16: Maintenance
® COBREX Storage Water Heater MAINTENANCE WARNING: Turn off all electrical service to the appliance before accessing electrical components or terminals located inside the control cabinet, junction boxes or at other points of wiring access. These terminals and components may be high voltage. Close and fasten the control cabinet cover, junction boxes and all other points of wiring access before restoring electrical service to the appliance. - Page 17 ® COBREX Storage Water Heater The frequency of cleaning (descaling/deliming) will be determined by the rate of scale buildup. Until the appropriate cleaning interval is established, it is recommended that the heat exchanger be internally cleaned every six months or more frequently if higher scaling conditions become apparent.
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Page 18: Recommended Maintenance Schedule
® COBREX Storage Water Heater 8.6 Recommended Maintenance Schedule 1. Annual Maintenance a. Check all joints, pipe connections and the heat exchanger for tightness, corrosion or deterioration. b. Check all pumps, valves, controls and devices including thermostats for proper operation. -
Page 19: Troubleshooting Guide
® COBREX Storage Water Heater TROUBLESHOOTING GUIDE Problem 1: Outlet water temperature not constant a. Cause: Insufficient recovery. Solution: Check and be sure heater design rating is not being exceeded. b. Cause: Malfunctioning or misadjusted thermostat(s). Solution: If the thermostat or controller is always open, then the outlet temperature will vary with load. - Page 20 ® COBREX Storage Water Heater Problem 5: Heat exchanger visibly leaking. a. Cause: Plumbing connection loose. Solution: Check and tighten plumbing connection. b. Cause: A continuous weep-hole leak indicates one or more failed double wall heat exchanger tubes. Confirm the water at the weep-hole is not from an external source.
- Page 21 ® COBREX Storage Water Heater Problem 8: Steam delivery pressure erratic. a. Cause: Pressure drop limits exceeded. Recommended maximum single stage reduction is 100 psi (6.9 bar). Solution: Reduce the pressure drop. If drop remains above 100 psi (6.9 bar), consult representative or factory.
- Page 22 MODEL NUMBER: SERIAL NUMBER: INSTALLATION DATE: PVI Industries, LLC • 3209 Galvez Ave. • Fort Worth, TX 76111 • 1-800-433-5654 • www.pvi.com PV500-65 04/15...
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