Table of Contents
Advertisement
Quick Links
Installation, Operation and Maintenance Instructions
Installation,
Operation and
Maintenance
Instructions for
Mighty Max
Volume Water Heaters
Model VW
Sizes 320M - 1000M
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water heater installation and maintenance. Improper installation and/or operation could
create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.
Improper installation and/or operation will void the warranty.
If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency, or gas
supplier.
WARNING
WHAT TO DO IF YOU SMELL GAS
Document 2064C
Advertisement
Table of Contents
Related Manuals for Laars Mighty Max VW Series
Summary of Contents for Laars Mighty Max VW Series
- Page 1 Installation, Operation and Maintenance Instructions Document 2064C Installation, Operation and Maintenance Instructions for Mighty Max Volume Water Heaters Model VW Sizes 320M - 1000M FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hot water heater installation and maintenance. Improper installation and/or operation could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.
-
Page 2: Table Of Contents
LAARS HEATING SYSTEMS Page 2 TABLE OF CONTENTS SECTION 1. SECTION 3. General Information Operation Introduction ........... 3 Start Up Requirements ....... 17 Warranty ............3 Hi-Limit Checkout ........17 Technical Assistance ........3 Venturi and Gas Pressure Regulator System ........17 SECTION 2. -
Page 3: General Information
520,000 442,000 limited factory warranty. Details are specified on the back cover of this manual. 625M 625,000 531,250 Make all warranty claims to an authorized Laars 775M 775,000 658,750 representative or directly to the factory. Claims must 1000M 1,000,000 293... -
Page 4: Installation Instructions
Install the Mighty Max VW heater in accordance be isolated or otherwise protected from any source of with the procedures in this manual (or the Laars corrosive chemical fumes, such as trichlorethylene, warranty may be voided), local codes, and ordinances. - Page 5 Mighty Max Volume Water Heater Page 5 Air Shutter Enclosure Air Shutter Enclosure Filter Air Shutter Filter Housing Enclosure Housing Filter Blower Housing Motor Blower Blower Motor Motor Automatic, Regulator Regulator Regulator Venturi Redundant Venturi Gas Valve Automatic Redundant Gas Valve Manual Gas Venturi Manual Gas...
-
Page 6: Freeze Protection
Check the rating plate to make sure the heater is fitted for the type of gas being used. Laars Supply Pressure Natural Gas Propane Gas heaters are normally equipped to operate below a Water Column 2000 foot (610m) altitude. -
Page 7: Water System Piping
Generally, hard water must 2G-1. Water Chemistry be pumped at higher velocity; however, soft water will Laars equipment is designed to be used in a erode holes in the heat exchanger tubing if pumped variety of water conditions. The water velocity in the too fast. - Page 8 LAARS HEATING SYSTEMS Page 8 maximum working pressure shown on the rating plate Must be installed to allow complete drainage of of the water heater, or the maximum working pressure both the relief valve and discharge pipe. of the separate storage vessel, whichever is the lower Must not have any valve between the relief valve pressure.
-
Page 9: Pump Requirements
Note: 1. Pressure dop includes allowance for 30 feet 9.1m of piping and normal fittings. If piping is shorter or of larger diameter, pump power may be reduced substantially. Contact Laars Representative for assistance. 2. Heaters for soft water application should be equipped with cupronickel heat exchangers. -
Page 10: Venting And Combustion Air Information
The following requirements must be used for (204°C) rating or high temperature Non-Category I venting: silicone sealer with 500°F (260°C) rating, Dow No. 736 Laars specified vent pipe material (Table 6) and sizes (Table 7). Insulation R5 minimum with protective cover Pipe insulation and sealing tape. - Page 11 Mighty Max Volume Water Heater Page 11 Category I For vertically ducted combustion air: • Combustion air intake must terminate at least 3 feet (0.91m) lower than vent termination, if it is located within a 10 foot (3.05m) radius. • Combustion air intake must be at Vertical Venting (Category I) least 1 foot (0.3m) above roof top Combustion Air In...
- Page 12 LAARS HEATING SYSTEMS Page 12 Blank Plate On Adapter Plate Heater Jacket Top Panel Top Panel Blank Plate On Vent Flue Collector Collar/Stack Blank Plate (Heater Jacket) 1. Removal of Blank Plate and Adapter 3. Blank Plate Placement Plate From Heater...
-
Page 13: Horizontal Venting - Non Category I
(1.2m) horizontally from, or 3 feet (0.9m) above Combustion air must be taken from out-of-doors such openings. by means of the Laars side wall terminal. Locate the terminal within 10 feet (3m) of the Locate the vent terminal so that it cannot be heater vent exhaust terminal, but no closer than 3 feet blocked by snow. -
Page 14: Conversion For Ducted Combustion Air
LAARS HEATING SYSTEMS Page 14 Vent Terminal 4 ft. (1.2 m) Min. Less Than Vent Terminal 10 ft. (3.0 m) 3 ft. (0.9 m) Min. 4 ft. (1.2 m) Min. 6 ft. (1.8 m) Min. Vent Terminal Forced Air 12 in. (305mm) Min. -
Page 15: Combustion Air Piping
Mighty Max Volume Water Heater Page 15 2K-4. Combustion Air Piping Boiler Size Assembly Number Run piping of the appropriate size between the 20258101 air intake terminal and the heater (see Table 7). Table 9 lists the materials for piping the heater. 20258102 20258103 Term... - Page 16 LAARS HEATING SYSTEMS Page 16 Figure 11. Wiring Diagram.
-
Page 17: Operation
Mighty Max Volume Water Heater Page 17 Normal Operating Sequence SECTION 3. When the circulation pump is running, the heater Operation will turn itself on and off in response to the water temperature. When the water cools below the set temperature, the following sequence WARNING occurs: Do not use this appliance if any part has been under... -
Page 18: Venturi Adjustment
LAARS HEATING SYSTEMS Page 18 Venturi Inlet Equalizer Tap (Blue) “Low” Side of Tube Manometer Negative Pressure Regulator “High” Side of Manometer Orifice Venturi Throat Tap (Yellow) Gas Orifice Tap (Red) Figure 14. Measurement of Venturi Throat Pressure Differential. Air/Gas... -
Page 19: To Start Up System
Mighty Max Volume Water Heater Page 19 Leaving the positive side of the manometer WHAT TO DO IF YOU SMELL GAS connected to the venturi inlet tap (blue), connect · Do not try to light any appliance. the negative side of the manometer to the shutoff ·... -
Page 20: Pressure Measurements Ports
LAARS HEATING SYSTEMS Page 20 3F-1. Pressure Measurement Ports Air flow enters the venturi through the filter box and blower assembly. It is pushed through a converging section and into the throat, where pressure is reduced substantially. Gas flow is pulled into the throat through an orifice. -
Page 21: Venturi Setup Procedure
If there is no obvious cause contact a qualified 4A. General Instructions Laars service technician. Oil the water circulating pump in accordance Approximately 40 seconds after the blower starts with the manufacturer's instructions. -
Page 22: Heater Exchanger
LAARS HEATING SYSTEMS Page 22 If a strainer is used in a pressure reducing valve 4B-1a. External Heat Exchanger or in the piping, clean it every 6 months in Inspection accordance with the manufacturer's instructions. Disconnect electrical supply to the heater. -
Page 23: 2B. Cleaning The Heat Exchanger - Internal
Remove the inlet/outlet header of the heat ARROW exchanger. FILTER Remove the return cover of the heat exchanger. Clean the internal surface. (Laars offers a tube Figure 18. Filter Exposed for Cleaning. cleaning kit part number R0010000.) Reassemble in the reverse order. 4D-2. Filter Service 4C. -
Page 24: Troubleshooting
LAARS HEATING SYSTEMS Page 24 developed. The factory recommends cleaning the filter heater. Refer to the wiring diagram for correct at least once every 30 days. In high contamination connection locations. areas, such as construction sites, factories, etc., the filter may need to be cleaned daily. Failure to do so 5C-1. - Page 25 Mighty Max Volume Water Heater Page 25 Figure 19. Troubleshooting Chart.
-
Page 26: Electrical Troubleshooting
Parts List for Mighty Max VW Heater Remove the lower front panel (see Figure 20). 6A. General Information To order or purchase parts for the Laars Mighty Max VW heater, contact your nearest Laars contractor or distributor. If they cannot supply you with what... - Page 27 Mighty Max Volume Water Heater Page 27 Front View Right Side View...
- Page 28 LAARS HEATING SYSTEMS Page 28 Rear View Front View Left Side View Right Side View...
- Page 29 Mighty Max Volume Water Heater Page 29 Item Description Part Number Item Description Part Number Combustion Chamber Weldment Heat Exchanger Assy., 2 pass, Cupronickel tubes 320M ............20159101 520M ............20104603 400M ............20159102 625M ............20104604 520M ............20159103 775M ............
- Page 30 LAARS HEATING SYSTEMS Page 30 Item Description Part Number Item Description Part Number 38. Tile Assembly 28. Panel, Side, Left ..........20152700 320M ............20255101 29. Panel, Bottom Side, Left ........ 20152900 400M ............20255102 30. Panel, Access 520M ............20255103 320M ............
- Page 31 Mighty Max Volume Water Heater Page 31...
- Page 32 6000 Condor Drive, Moorpark, CA 93021 • 805.529.2000 • FAX 805.529.5934 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • FAX 603.335.3355 480 S. Service Road West, Oakville, Ontario, Canada L6K 2H4 • 905.844.8233 • FAX 905.844.2635 www.laars.com Litho in U.S.A. © Laars Heating Systems 0303 Document 2064C...