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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 and draft fan when the water

reaches 170° F (Set) and will turn on the draft and draft fan when the water falls 10° F (Hy, see page 20).

• During shut down (low wood supply) or when the water falls to 120° F (ALL, see page 20) the controller will shut off

the draft and draft fan. At this time, the WoodMaster will need to be filled with wood and the ETC will need to be reset.
(See page 13)

Energy Start Shut-Down (LA):

•

This function shuts down the WoodMaster draft and draft fan when not in use and back-up system is operating

(Example: if gone for the weekend, wood firing furnace runs out of wood and back-up system takes over). To restart

the WoodMaster, simply push the Set Button.

Start Up / Reset

• The first time the WoodMaster is powered up or when it has shutdown, the controller display will flash “LA” two

times and then display the water temperature for two seconds and then start over. This is normal and indicates the

system has shut down because the water is at or below 120° F.

• To start up (or reset) your WoodMaster, press the set button one time. The display will indicate “rSt” (reset) and after

1 to 2 seconds, the draft will open and the draft fan will turn on. The display will continue to flash “LA” and the water

temperature will be displayed until the water temperature reaches 140° F (ALL + 20). After water temperature

reaches 140° F, only the water temperature will be displayed until the water temperature falls to 120° F.

•

Note:

The fan switch must be in the on position.

•

Note:

Fan switch can be shut off when loading or for servicing.

Parameter Description and Factory Settings:

• Set (Set Point) - 170° F

• Hy (Differential) - 10° F

• ALL (Low Alarm) - 120° F

How To:

•

View Set Point

— Push and immediately release the set key, display will indicate set point and will return to water

temperature after 5 seconds.

• Change the Set Point — Push and hold the set key until the set point is displayed, change the value using the up and

down arrows, and press the set key. The set point will flash a few times and then the display will return to water tem

perature.

• Change Hy or ALL — Push and hold the set and down arrow keys at the same time until Hy is displayed. Using

the up and down arrows, select the parameter to be changed (Hy or ALL), push the set key once (value of parameter

should be displayed), use arrows to change value, and push the set key (value should flash a few times). After 10-15

seconds the display will change back to water temperature.

Green Float Light:

• Green light on: Water level O.K.

• 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.

E.T.C. Guide

Reference

Содержание LT 90

Страница 1: ...oor 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 ...

Страница 2: ...hooting 24 Warranty 25 28 Specifications 29 Notes 30 31 Thank you for purchasing a quality wood furnace from 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 Table of Contents ...

Страница 3: ...m Only responsible adults should operate your LT 90 If the LT 90 is not fired properly damage could result and the warranty may be voided Never allow children to play near or tamper with the Furnace fuels or any other part of the system Always keep the area around and in front of the system clean and free from combustible materials Keep animals away from the system The operation may not be continu...

Страница 4: ...er can supply the genuine service parts and install them All fuels must conform to certain quality standards to ensure trouble free operation of the furnace Use of unapproved fuels may result in faulty operation and a voided warranty Never use the following trash household garbage plastics gasoline rubber naphtha leaves and materials treated with petroleum prod ucts ie particleboard railroad ties ...

Страница 5: ...el 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 Exchanger Clean Out Secondary Return Cold Solenoid Combustion Fan Secondary Supply Hot Features ...

Страница 6: ...cturing Inc A draft inducer may be used to ensure proper draft under all conditions Note Remove the chimney cap prior to lighting the furnace CAUTION Using a non insulated chim ney or failure to use a Class A Insulated Chimney WILL result in a voided Warranty When using more than four feet of chimney extension external support is needed Pad Supports The LT 90 should be placed on cement blocks The ...

Страница 7: ...e buried two to three feet deep If lines travel through a low or wet area they should be insulated and installed in a water tight piping PVC Note Leave a minimum of three feet of water line exposed above ground at the furnace to insure adequate length for connection Note Before insulating and burying the water lines label the hot water supply line at both ends Once the lines are covered you will b...

Страница 8: ...e pump Then attach the hot water supply 1 Pex Water Line 0020 130 to the fitting using 1 Pex Crimp Ring 0020 145 Water Return Attach the 1 Pex x 1 MIP 0020 140 fitting to the Water Return Valve Then attach the cold water return 1 Pex Wa ter Line 0020 130 to the fitting using 1 Pex Crimp Ring 0020 145 Wiring The Pump Remove the cover on the pump Then using an approved wire connect the ground wire t...

Страница 9: ...be enters the bottom fitting of the heat exchanger and exits the top fitting which returns to the furnace If the plenum is too large or too small it must be altered to fit the heat exchanger properly Note The water to air heat exchanger must be in stalled below any existing off peak electric coils already in the plenum After the installation of the WoodMaster add on water to air exchanger the air ...

Страница 10: ...ater 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 Supply for filling boiler Cold Water Return to WoodMaster Filling With Water Connect a garden hose between a domestic water supply and the furnace fill valve 0020 325 wh...

Страница 11: ...als fall out of the furnace when opening the fuel door During periods of warmer weather you may find it to have creosote inside the firebox It is important to fill the furnace only with enough wood to last up to a 12 hour period After burning your furnace for a period of time you will discover how much wood is needed per day and what types of wood burn the best Loading the Furnace When loading you...

Страница 12: ...ts smallest usable form To make sure that you are rotating your ashes properly follow the instructions below 1 With your Ash Hoe pull the ash from the back of the furnace to the front and level coal bed 2 Load wood length wise towards the back Be careful not to damage rear door or plug air holes Remove ash from the front of the furnace as needed Make sure not to remove any hot coals with the ash a...

Страница 13: ...2 seconds the draft will open and the draft fan will turn on The display will continue to flash LA and the water temperature will be displayed until the water temperature reaches 140 F ALL 20 After water temperature reaches 140 F only the water temperature will be displayed until the water temperature falls to 120 F Note The fan switch must be in the on position Note Fan switch can be shut off whe...

Страница 14: ...y and quick reference The instrument shall not be used for purposes different from those described hereunder It cannot be used as a safety device Check the application limits before proceeding Some parameters such as CH are not applicable to Woodmaster see default settings grid fig 15 on next page Check the supply voltage is correct before connecting the instrument Do not expose to water or moistu...

Страница 15: ...ed and the keyboard will be locked 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 5 1 HOW TO SEE THE ALARM DURATION AND MAX MIN TEMPERATURE 5 2 HOW TO RESET A RECORDED ALARM OR ONE THAT IS STILL OCCURRING 6 MAIN FUNCTIONS 6 1 HOW TO SEE THE SETPOINT 6 2 HOW TO CHANGE THE SETPOINT 6...

Страница 16: ...temperature reading Changing the All 1 When the E T C reads ALL from the previous step press the set button The number that appears is the Low Alarm temperature 2 To adjust the number press the up or down arrow 3 Press the Set button to lock in the setting Definitions Set Point The temperature at which the fan will shut down Hy aka Differential The amount in degrees the temperature has to drop in ...

Страница 17: ... limits before proceeding Some parameters such as CH are not applicable to Woodmaster see Section 9 Default Settings Check the supply voltage is correct before connecting the instrument Do not expose to water or moisture use the controller only within the operating limits avoiding sudden temperature changes with high atmospheric humidity to prevent formation of condensation Warning disconnect all ...

Страница 18: ...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 5 1 HOW TO SEE THE ALARM DURATION AND MAX MIN TEMPERATURE 5 2 HOW TO RESET A RECORDED ALARM OR ONE THAT IS STILL OCCURRING 6 MAIN FUNCTIONS 6 1 HOW TO SEE THE SETPOINT 6 2 HOW TO CHANGE THE SETPOINT 6 3 HOW TO CHANGE A PARAMETER VALUE 6 4 HOW TO LOCK THE KEYBOARD 6 5 T...

Страница 19: ...r down arrow 3 Press the Set button to lock in the setting Definitions Set Point The temperature at which the fan will shut down until hysteresis is achieved Hy aka Differential The amount in degrees the temperature has to drop in order to start the fan ALL aka Low Alarm The temperature at which the furnace will shut down At which point the furnace should be reloaded and the control is reset Note ...

Страница 20: ...and furnace may be hot Ash Removal and Disposal Weekly or as needed Remove the ashes when the furnace is very low on wood Use a shovel to take the ashes from the front of the fire box and use a Ash Hoe to pull the ashes from the rear of the furnace to create a level bed of hot coals The ashes should be placed in a metal container with a tight fitting lid The closed container of ashes should be pla...

Страница 21: ...when not in use will void your warranty When the furnace is in use be sure that you maintain a good ash rotation This should be done weekly If you are using a spark arrester or a chimney cap you will need to provide your furnace with a little more maintenance It is very important that you keep these areas free of any creosote build up at all times Failure to do this will cause harm to the roof of ...

Страница 22: ...22 LT 90 Owners Manual 2015 Wiring ...

Страница 23: ...23 LT 90 Owners Manual 2015 Wiring ...

Страница 24: ...th wood being burned Wood or system need to be addressed If Furnace Boils 1 Check fire door Be sure door was not left open 2 Check fire door rope This is the fire resistant gasket around the Fuel Door Make sure the door has a tight seal 3 Check air intake on fire door Make sure cover closes tight 4 In extremely warm weather a smaller amount of wood should be used 5 Check Auger Tube Plug for air le...

Страница 25: ...ents including but not limited to the outer shell paint insulation doors and latches during normal usage for a period of one 1 years from the date of installation START OF WARRANTY PERIODS The Warranty Period shall begin on the date the Furnace installation has been completed the Original Date of Installation In the event of dispute as to the Date of Original Installation the shipping date of your...

Страница 26: ...ace Failure to send in a water sample annually will void the warranty Boiler treatment must be used Freeze protection must be guaranteed at all times III This Warranty is non transferable and only covers the Original Owner at the original site of installation IV Northwest Manufacturing Inc shall have the time needed and unobstructed access to the Furnace for the purpose of conduct ing tests of the...

Страница 27: ...Cut here and mail registration card 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 ...

Страница 28: ... Date of Purchase Dealers Name Address City State Zip Phone Serial Number How did you learn about our product Radio Newspaper Internet TV Print Other Would you like information on other products from Northwest Manufacturing Inc Yes No I have read the owners manual and understand the proper usage of my WoodMaster LT 90 Signature Printed Name Fold Fold Fold Fold Fold Fold Fold Fold Fold Fold Fold Fo...

Страница 29: ...ications Power Connection Single Phase 120v 60 Hz Maximum Current Draw 7 Amps 120 v 60 Hz Draft Fan Max Draw 1 Amp 120 v 60 Hz Maximum Power Output 90 000 BTU Weight 1800 Pounds approx Water Jacket Capacity 120 Gallons Door Size 16 x16 ...

Страница 30: ...30 LT 90 Owners Manual 2015 Notes ...

Страница 31: ...31 LT 90 Owners Manual 2015 Notes ...

Страница 32: ...Northwest Manufacturing Inc 600 Polk Ave SW Red Lake Falls MN 56750 www woodmaster com 800 932 3629 Manual PN 7994 590 ...

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