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Wood Master LT 90 Owner's Manual

Manual is about: outdoor wood fired hydronic heater

Summary of LT 90

  • Page 1

    Outdoor wood fired hydronic heater lt 90 lt series owners manual retain this manual northwest manufacturing, inc / 600 polk ave sw / red lake falls, mn 56750 www.Woodmaster.Com / 800-932-3629 / manual pn: 7994-590 rev: 3.1.

  • Page 2: Installation

    2 lt 90 owners manual 2015 safety ....................................................................................3 fuel .......................................................................................4 features ................................................................................

  • Page 3

    3 lt 90 owners manual 2015 • 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 perfor...

  • Page 4

    4 lt 90 owners manual 2015 safety fuel • never shut power off to the lt90 if there is a fire and fuel in the firebox unless there is an emergency. • take the proper precautions to ensure that the modifications made to an existing heating system does not interfere with existing safety controls. • nev...

  • Page 5: Front View

    5 lt 90 owners manual 2015 front view rear panel hanger strap night light safety stickers fuel door stainless steel chim- ney vent cap e.T.C. Panel maintenance schedule serial/model numbers primary return (cold) water temp snap disc thermistor probe primary supply (hot) drain draft inducer heat exch...

  • Page 6

    6 lt 90 owners manual 2015 choosing location when installing your woodmaster, keep in mind the direction of the winds during heating months. Try to place the furnace in an area where exhaust will not be a problem for yourself or any surrounding neighbors. Location: it is recommended that the unit be...

  • Page 7

    7 lt 90 owners manual 2015 trench the trench must be 24 inches deep and 6 to 12 inches wide. It can be dug with a shovel or a backhoe. Place all the dirt to one side of the trench to allow room for working on the other side. Wiring place electrical supply in bottom of trench and cover with 6 inches ...

  • Page 8

    8 lt 90 owners manual 2015 1” cast iron pump flange pump black rubber gasket (supplied with pump) hot water supply valve black rubber gasket (supplied with pump) hot water supply (on back of furnace) direction of flow indicator arrow 1” pex crimp x 1” mip (0020-140) 1” pex water line (0020-130) 1” p...

  • Page 9

    9 lt 90 owners manual 2015 entering the building with water lines can be done underground or over the sill plate. Once inside the building the typical hookup would run first to the domestic hot water supply and next to an existing heating system such as a forced air furnace or a hot water heating sy...

  • Page 10

    10 lt 90 owners manual 2015 hot water supply from woodmaster cold water return to woodmaster existing heat zone return woodmaster water to water heat transfer unit circulating pump for existing hot water heating system existing hot water boiler cold water return from heat exchanger domestic water su...

  • Page 11: Side View

    11 lt 90 owners manual 2015 firing the furnace once properly installed and full of water, go to the e.T.C. Control and turn fan switch off. If below “la” (low alarm, see e.T.C. Section) press set on dixell. Paper and kindling should be used for starting the fire. Build a small fire, turn fan switch ...

  • Page 12

    12 lt 90 owners manual 2015 operation ash rotation maintaining proper ash rotation and wood fill is crucial to the performance of your woodmaster furnace. Keeping a fresh bed of coals on the top of your ashes will ensure that you get the most out of whatever kind of wood that you burn by burning and...

  • Page 13

    13 lt 90 owners manual 2015 electronic temperature control (e.T.C.): function: (factory settings below) • the e.T.C. Monitors and controls the woodmaster water temperature by controlling the draft and draft fan. • during normal operation (adequate wood supply) the controller will turn off the draft ...

  • Page 14

    14 lt 90 owners manual 2015 time temperature fan on heating set point set point- hy 4. Front panel commands led1 led 2 set : displays the target set point; selects and confirms a parameter in the programming mode. Also used in conjunction with ( up) and ( down ) to view the min and max recorded temp...

  • Page 15

    15 lt 90 owners manual 2015 if the led2, the alarm led is on, an alarm has taken place to see the kind of alarm, the max (min) reached temperature and alarm duration do as follows: 1. Push the up or down key. 2. On the display the following message is shown: “hal” for high temperature alarm ( “lal” ...

  • Page 16: Changing The Set Point

    16 lt 90 owners manual 2015 changing the set point 1. Press and hold the set button for 3 seconds or until the fan symbol is flashing. The number that appears is the set point. (fig. 1) 2. Use the up or down arrow buttons to adjust the setting. 3. Press the set button to lock in the settings. Changi...

  • Page 17

    17 lt 90 owners manual 2015 e.T.C. Guide reference time temperature fan on heating set point set point- hy 4. Front panel commands set : displays the target set point; selects and confirms a parameter in the programming mode. Also used in conjunction with ( up) and ( down ) to view the min and max r...

  • Page 18

    18 lt 90 owners manual 2015 if the alarm led is on, an alarm has taken place to see the kind of alarm, the max (min) reached temperature and alarm duration do as follows: 1. Push the up or down key. 2. On the display the following message is shown: “hal” for high temperature alarm ( “lal” for the mi...

  • Page 19: Changing The Set Point

    19 lt 90 owners manual 2015 changing the set point 1. Press and hold the set button for 3 seconds or until the ˚c/˚f is flashing. The number that appears is the set point. (fig. 1) 2. Use the up or down arrow buttons to adjust the setting. 3. Press the set button to lock in the settings. Changing th...

  • Page 20: (Fig. 1)

    20 lt 90 owners manual 2015 (fig. 1) (fig. 2) to maintain the efficiency of your furnace the manufacturer recommends that you preform these checks a minimum of once a week. You may need to clean it more frequently depending on the heat load and the type of wood that you are burning. Cleaning the fir...

  • Page 21: Boiler Treatment

    21 lt 90 owners manual 2015 maintenance creosote - formation and need for removal when wood is burned slowly, it produces tar and other organic vapors, which combine with expelled mois - ture to form creosote. The creosote vapors condense in the relatively cool chimney flue of a slow-burning fire. A...

  • Page 22

    22 lt 90 owners manual 2015 wiring.

  • Page 23

    23 lt 90 owners manual 2015 wiring.

  • Page 24

    24 lt 90 owners manual 2015 if furnace is not heating: 1. Check fire. 2. Check pump. If pump is not running, shut off power supply to pump and inspect. 3. Check water level. If water is low, inspect for leaks in the system. 4. Check chimney for creosote build-up. If opening is reduced fire cannot bu...

  • Page 25

    25 lt 90 owners manual 2015 warranty this warranty is provided by northwest manufacturing, inc. Only for the benefit of the initial purchaser (original owner) of the northwest manufacturing, inc. Lt 90 (the “furnace”) on the original site of installation (the “site of original installation”). This w...

  • Page 26

    26 lt 90 owners manual 2015 warranty vi. Any costs for labor for the examination, removal or reinstallation of allegedly defective parts, transportation of the parts to and from northwest manufacturing, inc. Facilities will not be covered and will be the responsibility of the original owner. This in...

  • Page 27

    Cut her e and mail r egis tr ation c ar d northwest manufacturing inc. 600 polk ave. Sw red lake falls, mn 56750 northwest manufacturing inc. 600 polk ave. Sw red lake falls, mn 56750 place postage here.

  • Page 28

    Please fill out the warranty registration card below and mail it back to us. Failure to register may delay warranty claims. Woodmaster lt 90 warranty registration card owners name address city state zip daytime phone home phone email date of purchase dealers name address city state zip phone serial n...

  • Page 29

    29 lt 90 owners manual 2015 specifications power connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single phase, 120v, 60 hz maximum current draw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 amps @ 120 v, 60 hz draft fan (ma...

  • Page 30

    30 lt 90 owners manual 2015 notes.

  • Page 31

    31 lt 90 owners manual 2015 notes.

  • Page 32

    Northwest manufacturing, inc / 600 polk ave sw / red lake falls, mn 56750 www.Woodmaster.Com / 800-932-3629 / manual pn: 7994-590