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Summary of Contents for Wood master LT 90
- Page 1 LT SERIES OWNERS MANUAL Retain this manual LT 90 Outdoor Wood Fired Hydronic HEater Rev: 3.1 www.woodmaster.com / 800-932-3629 / Manual PN: 7994-590 Northwest Manufacturing, Inc / 600 Polk Ave SW / Red Lake Falls, MN 56750...
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Page 2: Table Of Contents
WoodMaster. This product was designed to de- liver easy, trouble free operation for years to come. Check out other WoodMaster heating products at www.woodmaster.com, or our line of quality pellet grills at www.woodmasterpelletgrills.com. LT 90 Owners Manual 2015... -
Page 3: Safety
Safety • Read and follow these directions carefully. Retain this manual for as long as you own your LT 90. • All installation and operations must follow STATE and LOCAL CODES for wiring, and firing of this unit. These CODES may differ from this manual. Installation must be performed by a qualified installer. -
Page 4: Fuel
• Never use the following: trash, plastics, gasoline, rubber, or naphtha in your WoodMaster LT 90. • Read and follow these directions carefully. Retain this manual for as long as you own your LT 90. Sweeping The chimney should be inspected and cleaned as needed, typically twice a year. -
Page 5: Features
Maintenance Schedule Fuel Serial/Model Door Numbers Rear Panel Draft Inducer Heat Exchanger Primary Return Clean Out (Cold) Secondary Return Water Temp Snap (Cold) Disc Solenoid Thermistor Probe Combustion Primary Supply (Hot) Secondary Supply (Hot) Drain 2015 LT 90 Owners Manual... -
Page 6: Installation
WoodMaster LT 90 on a proper support will result in a voided warranty. Never use com- bustable materials, such as wood blocks, 16.00 12.00 to support the LT 90. A full cement pad is 14.00 recommended if the supporting ground is 54.00 6.00 soft, sandy, or othewise unable to support 6.00... - Page 7 Note: Use only approved water line insulation sold through your WoodMaster Dealer. Poor insulation will cause your Wood Master furnace to burn large amounts of fuel, and hurt the efficiency of the system. For best results use high quality insulation.
- Page 8 Note: The pump must run continuously whenever the WoodMaster Furnace is in use. DO NOT run the pump dry. Note: All wiring must follow state and local codes and should be done by a qualified electrician. Disconnect power before servicing any electrical components. LT 90 Owners Manual 2015...
- Page 9 The heat exchanger works on the same princi- pal as your car heater. Air blows through the heat exchanger, taking the heat from the water and blowing it into your existing duct work. 2015 LT 90 Owners Manual...
- Page 10 Add water until it flows out of the vent pipe. Install the vent cap into the vent pipe once the furnace is filled with water. Note: Place the steam saver on the furnace vent once the furnace is full. LT 90 Owners Manual 2015...
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Page 11: Operation
Note: The amount of wood needed to heat your system will vary depending on a lot of different factors. System design, insulation values and type of wood are a few of the contributing factors that will determine how much wood is needed. 2015 LT 90 Owners Manual... - Page 12 Remove ash from the front of the furnace as needed. Make sure not to remove any hot coals with the ash, and properly dispose of hot ash in a metal container. Dispose of all ash properly. For more information, see the maintenance section. LT 90 Owners Manual 2015...
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Page 13: Reference
• Green light off: Water level low, add water. Light Switch: Operates lights. Fan Switch: The fan switch must be on during normal operation, but may be turned off to fill furnace or for maintenance. 2015 LT 90 Owners Manual... - Page 14 The Hy value is automatically set under the Set Point. If the temperature decreases and reaches set point minus differen- tial the regulation output is activated and then turned off when the temperature reaches the set point value again. Alarm LT 90 Owners Manual 2015...
- Page 15 At this point it will be possible only to see the set point or the MAX o Min temperature stored. 3. If a key is pressed more than 3s the “POF” message will be displayed. 2015 LT 90 Owners Manual...
- Page 16 Set Point (SP) 170° F Set Point (SP) 100° F to 180° F Differential (Hy) 10° F Differential (Hy) 1° F to 45° F Low Alarm (ALL) 120° F Low Alarm (ALL) -67° F to 302° F LT 90 Owners Manual 2015...
- Page 17 The Hy value is automatically set under the Set Point. If the temperature decreases and reaches set point minus differen- tial the regulation output is activated and then turned off when the temperature reaches the set point value again. Alarm 2015 LT 90 Owners Manual...
- Page 18 At this point it will be possible only to see the set point or the MAX o Min temperature stored. 3. If a key is pressed more than 3s the “POF” message will be displayed. LT 90 Owners Manual 2015...
- Page 19 Set Point (SP) 170° F 76.7°C 1° C to 25° C Differential (HY) 10° F 5.5°C Low Alarm (ALL) -67° F to 302° F Low Alarm (ALL) 120° F 48.9°C -55° C to 150° C 2015 LT 90 Owners Manual...
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Page 20: Maintenance
Note: Try to keep the Combustion Fan and the Draft Inducer Blades was clean as possible. Clean the Combus- tion Fan by using a brush to keep the impeller clear of any build-up. (Fig. 1) Inspect fire box for creosote and ash corrosion. LT 90 Owners Manual 2015... -
Page 21: Maintenance
Leaving your furnace empty of water exposes the water jacket to oxygen which will shorten the life of your furnace. If your system has antifreeze, you do not need to drain it. However you should then test your water annually. For water sampling contact your dealer. NOTE: You must replace boiler treatment annually. 2015 LT 90 Owners Manual... -
Page 22: Wiring Diagram
Wiring LT 90 Owners Manual 2015... - Page 23 Wiring 2015 LT 90 Owners Manual...
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Page 24: Troubleshooting
Check water level to insure that your furnace is full. NOTE: Combustion fan will not be turning when stack temp is above 260° F. If none of these suggestions appear to solve your problem, contact your dealer. LT 90 Owners Manual 2015... -
Page 25: Warranty
FIVE (5) YEARS from the Date of Original Installation. If there is a leak in your properly delivered and installed WoodMaster LT 90 in the rst year, WoodMaster will replace the furnace at no cost to the original owner. (A leak means; a leak in the rebox or water jacket.) Northwest Manufacturing, Inc. - Page 26 Allegedly defective parts MUST be returned to Northwest Manufacturing, Inc. for the purpose of inspection to determine cause of failure. Northwest Manufacturing, Inc. / 600 Polk Ave. SW / Red Lake Falls, MN 56750-5002 (800) 932-3629 • Fax: (218) 253-4409 / www.woodmaster.com LT 90 Owners Manual 2015...
- Page 27 Northwest Manufacturing Inc. PLACE POSTAGE 600 Polk Ave. SW HERE Red Lake Falls, MN 56750 Northwest Manufacturing Inc. 600 Polk Ave. SW Red Lake Falls, MN 56750...
- Page 28 Other Fold Fold Fold Fold Fold Fold Fold Fold Fold Would you like information on other products from Northwest Manufacturing, Inc.? I have read the owners manual and understand the proper usage of my WoodMaster LT 90. Signature Printed Name...
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Page 29: Specifications
Door Size ............. . . 16”x16” 2015 LT 90 Owners Manual... -
Page 30: Notes
Notes LT 90 Owners Manual 2015... - Page 31 Notes 2015 LT 90 Owners Manual...
- Page 32 www.woodmaster.com / 800-932-3629 / Manual PN: 7994-590 Northwest Manufacturing, Inc / 600 Polk Ave SW / Red Lake Falls, MN 56750...
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