Nature's Comfort GT-220 Installation And Operating Instructions Manual Download

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ISTALLATIO AD

OPERATIG ISTRUCTIOS FOR

GT-220 DOWDRAFT GASIFICATIO

O-PRESURIZED WOOD BOILER

Made in the USA

BUILT LIKE A TAK

WITH LASER PRECISIO

Revision 2009-1.1

Summary of Contents for GT-220

Page 1: ...I STALLATIO A D OPERATI G I STRUCTIO S FOR GT 220 DOW DRAFT GASIFICATIO O PRESURIZED WOOD BOILER Made in the USA BUILT LIKE A TA K WITH LASER PRECISIO Revision 2009 1 1 ...

Page 2: ...low all instructions and keep this manual handy THIS MANUAL INCLUDES IMPORTANT SAFETY INFORMATION ON PAGE 5 Again thank you for purchasing a Nature s Comfort Boiler We appreciate your business For the most up to date installation operation warranty information or if you need to see any page in color go to Please keep this manual with all other important papers The information in this manual is nec...

Page 3: ...oncreteBlockFooting 13 C PlumbingHookup 13 D WiringtheBoiler 14 E InstallationofPexPipe 14 F FillingBoilerwithWater 14 G PlumbingPartsNeeded 14 H AddingBypassValves 15 I InstallingHeatExchangerInPlenum 15 J InstallingHeatExchangerInSmallPlenum 17 K BleedingtheHeatExchanger 18 L AirFlowthroughPlenum 18 M ThermostatWireLayout 18 IV OtherHookUps HeatingDomesticWater PoolsandSpa s A LayoutofWaterLines...

Page 4: ...Breaker 15 Amp Draft Blower 550 CFM 115 VAC Water Pump 115 VAC 2A max C Clearance to Combustibles Required Top Front Rear and Sides 36 inches Flooring Non Combustible Chimney 36 inches D Boiler Dimensions Specifications 300 000 BTU 220 gallon water tank 6 000 sq ft 45 x 78 x 83 tall 2 380 pounds Will heat up to 7000 sq ft This must include all heated areas of home as well as basement with proper i...

Page 5: ...ghtly shut unplug the control power make sure the blower cover is seated and keep the water jacket full 7 WARNING Risk of fire Do not operate with flue draft exceeding 0 1000 W C Drill a hole in the chimney near the exhaust exit for a place to measure and contact an HVAC professional for this if needed Do not operate with fuel loading door or refractory channel door open Do not store fuel or other...

Page 6: ...ler Nature s Comfort will not cover or be held responsible for any cost of wood or coal burned in excess of what is expected or considered normal as installation and structure size and insulation conditions are out of its control Treatment Testing If not using anti freeze or glycol your boiler must have Nature s Comfort Boiler treatment added during initial filling with water and must be tested an...

Page 7: ...llation operation and proper use of your boiler If you should ever have a problem or question refer to this manual or call your dealer Please have your serial number ready This is found on a label on the back of the rear access door and or stamped into the firebox door jamb on the top left If your dealer does not have the information you need request they contact Nature s Comfort and your dealer w...

Page 8: ...ls to start a fire Use small pieces of split kindling together with crumbled newspaper and add larger pieces For when starting a cold GT 220 open smoke bypass and leave open until water temp is at least 170F so the firebrick can get hot enough to start gasification To maintain the best operating conditions set the aquastat between 170 190F with a 3 degree differential see page 10 D Location Chimne...

Page 9: ...ded by a steel tank filled with water The boiler is a non pressurized boiler with an atmospheric vent The hot water is then circulated through underground pex pipes to a water coil heat exchanger installed inside your existing central duct system Typical of most systems A typical water to air heat exchanger much like a small radiator or heater core in a car is installed in your ductwork When air t...

Page 10: ...otter fire and remains on until the water temperature in the boiler reaches the set point of the aquastat Temperature may be set up to a maximum of 190F Do not set above this as the refractory bricks continue heating the water to around 200F after shutdown When heating your home through a radiant system the recommended and maximum setting is 190 When heating with a forced air system the recommende...

Page 11: ...ing back from home goes to the return ports Use of an additional valve here is recommended for ease of servicing Not included 10 Access door for catalytic converter back of refractory channels and heat exchanger tubes 11 Temperature gauge J Power Loss If there is a loss of power while the unit is running the firebox air damper will not close until power is restored resulting in possible over firin...

Page 12: ...tween the house and the boiler and the pex must be buried below frost lines 1 It is recommended that the boiler be installed with chimney extensions for due consideration to any neighboring residences and to the prevailing wind direction 2 Do not locate the boiler within 100 ft of a residence not served by the boiler Be considerate of neighboring residences properties parks etc 3 Do not locate the...

Page 13: ...revent freezing The depth of the trench varies in different regions of the country Be completely sure about the correct depth needed before the insulated pex pipe is installed underground Contact your local building inspector s office for this information CALL YOUR LOCAL MISS DIG HOTLINE BEFORE YOU DIG TRENCHES 4 If you purchased insulated pipe it may contain twine for pulling electrical wire If p...

Page 14: ...ws and all air has been purged Being a wet rotor unit if the pump runs dry at all it will seize up as the bearings rely on lubrication from the water Once all piping connections are complete pour the Nature s Comfort boiler treatment in fill the boiler with a hose through the float stack or if you have installed a fill line open the valve and allow it to fill stopping once the float starts to rise...

Page 15: ...Valves Adding a bypass valve system at each heat exchanger is a good idea so that if there is a potential problem such as a stopped up heat exchanger it can be diagnosed serviced easily by the owner as well as being used for a summer bypass as explained on page 19 Figure shows 3 valve setup used for bypass and isolation I Installing the Heat Exchanger in the Plenum Note It is recommended that you ...

Page 16: ...r and tubes F can stick out of the plenum as well if necessary As long as the entire coil surface B is in the plenum operation should be fine even if the header F and G sticks out While test fitting try to determine how much tape is needed around the frame of the heat exchanger to seal and keep air from flowing around it A different amount thickness may be needed on different sides You can purchas...

Page 17: ...al off the ends of the heat exchanger and the hole you made in the plenum with foil tape made for ductwork J Installing a Heat Exchanger in a Small Plenum You can install a heat exchanger in a plenum that is smaller than the length of the heat exchanger as follows Make cuts at the top and bottom of the plenum usually 4 inches long the width of the heat exchanger as shown below You may need to do t...

Page 18: ...xchanger as well K Bleeding the Heat Exchanger With the pump running Prime first and turn the thermostat up so that the pump comes on simply close the brass valve on the return side holding for 2 3 seconds then open quickly Repeat the procedure four times or until you cannot hear air rushing through the line L Air Flow through Plenum The motors on most force air furnaces have three speeds to provi...

Page 19: ... and air intakes are properly sealed to prevent any extra air from feeding the fire See the maintenance section for how to adjust the main door seal If the fire is smoldering out or there is difficulty achieving gasification typically this would only be in warmer weather plug in and adjust the overriding timer relay TR1 as needed to run the boiler overriding the aquastat to keep the fire going and...

Page 20: ...to install isolation and bypass valves for easy servicing and also place before a chlorinator D Connecting the Boiler to an Existing Indoor Boiler A heat exchanger is needed to transfer heat from the outdoor boiler to another indoor boiler or hydronic system so that the two systems remain isolated from each other As shown in the above figure the two systems are totally isolated from each other so ...

Page 21: ...of a chimney fire 3 All creosote and ash must be cleaned from the firebox frequently as ash mixed with moisture is very corrosive and will shorten the life of your boiler if not maintained properly Check daily until experience shows how often cleaning is necessary C Door Seals Check rope seals on the loading and refractory channel door periodically during the heating season as they will compress L...

Page 22: ... personnel or property for misuse improper installation of equipment or for knowing Federal Provincial State and Local codes ordinances and laws including local installation codes Owner assumes all responsibility for this GOING AWAY When going away during freezing weather and no one will be keeping the boiler going turn your backup heat system on the boiler control switch off and keep the circulat...

Page 23: ...n boiler Aqua stat malfunction Make sure loading door is sealed adjust if necessary make sure ash pan is shut Larger pump reduce of fittings Add water to keep full Replace Aqua stat Boiler fire does not stay lit Not leaving some coals in burn area No air flow Fire smoldering out Leave some coals in burn area replace blower adjust timer relay to increase auto cycle Good wood but does not burn Only ...

Page 24: ... CB Built Like A Tank With Laser Precision Page 24 of 24 ...

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