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Nature's Comfort NCB-120 Installation and operating manual

Manual is about: 2009-2014 NCB-175, NCB-250 Non-Pressurized Outdoor Wood Boiler

Summary of NCB-120

  • Page 1

    Installation and operating manual for 2009-2014 ncb-175, ncb-250 non-pressurized outdoor wood boiler manufactured by nature’s comfort llc. Made in the usa full color and french manual available online at: / couleur et manuel en français est disponible en ligne à: www.Naturescomfortllc.Com built like...

  • Page 3: Itroductio

    Itroductio thank youand congratulations on the purchase of your new nature’s comfort boiler! With the purchase of this nature’s comfort boiler, you can now appreciate the high degree of craftsmanship and reliability that are a result of every boiler being carefully hand-built as well as taking contr...

  • Page 5

    Table of contents i. General information a. Terminology ............................................................................. 6 b. Clearance to combustibles required .......................... 6 c. Boiler dimensions & specs .............................................. 6 d. Safety precautio...

  • Page 6

    Page 6 of 32 i. General information a. Terminology in this manual boiler: refers to the nature’s comfort boiler. Furnace:refers to the existing indoor gas or oil fired unit which heats the air or radiant water heat for the home. B. Clearance to combustibles required top, front, rear and sides: 36” f...

  • Page 7

    Page 7 of 32 d. Safety precautions do not operate this equipment for anything other than its intended purpose or for anything other than in accordance with the instructions contained in this manual and all other instructions accompanying the boiler. It is important to observe safety precautions to p...

  • Page 8

    Page 8 of 32 e. Controls & plumbing connections the outside boiler has a hot water thermostat (aquastat) with a thermocouple that is inserted into a brass drywell that senses the water temperature of the unit. When the temperature of water in the boiler falls below the “low” temperature setting on t...

  • Page 9

    Page 9 of 32 f. Heating the home the ncb boiler saves energy and provides the most comfortable heating available. It heats the home by burning seasoned hardwood to heat a firebox surrounded by a steel tank filled with water. The boiler is non-pressurized with an atmospheric vent and includes an easy...

  • Page 10

    Page 10 of 32 iii. Installing boiler installation is to be performed by a qualified installer and shall comply with all the requirements of the authority having jurisdiction over the installation. A. Location of boiler the ncb boiler must be located to comply with the clearance requirements. Keep th...

  • Page 11

    Page 11 of 32 if the unit is located in a windy area, it is recommended to install a non-combustible type of skirting around the feet and control area. B. Chimney: a 6” stainless steel rain cap must be purchased separately for installation and can be obtained from nature’s comfort or your dealer. If...

  • Page 12

    Page 12 of 32 d. Plumbing hook up plumbing connections should be well insulated after installation. Cover bottom access holes as well. Minimum pipe size permitted is 1”. Install the outgoing pex line on the pump flange that is already mounted to the lower end of the circulation pump. Install the ret...

  • Page 13

    Page 13 of 32 use this example diagram if you have a typical, basic 4 wire system: use the example drawing below if you have a 2 wire system or the thermostat is the advanced computerized type that communicates back and forth between the furnace (typically found on heat pump systems). Do not use thi...

  • Page 14

    Page 14 of 32 g. Adding bypass valves adding a bypass valve system (3 valves, 2 t’s and unions) 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 as well as being used for a summer bypass as explai...

  • Page 15

    Page 15 of 32 slide the heat exchanger into the hole for a test fit. Ideally the header and tubes (f) should stick out of the plenum. 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 (th...

  • Page 16

    Page 16 of 32 crimp the sheet metal to the edge of the heat exchanger (item g) using channel-lock pliers. This not only forms a virtually airtight seal, but also supports the heat exchanger as well. J. Adjusting plenum air flow the motors on most force air furnaces have three speeds to provide vario...

  • Page 17

    Page 17 of 32.

  • Page 18

    Page 18 of 32 l. Filling the boiler with water inspection: before filling, inspect the pump shaft by removing the large silver screw to expose the top of the shaft and turn back and forth with a screw driver to make sure the shaft was not broken during shipping. Broken shafts are not covered under w...

  • Page 19

    Page 19 of 32 option 3: (best but more hassle and messy) purchase a tube of high temperature caulk from your dealer or nature’s comfort and brush over the entire surface area of the rope seals to permanently seal out smoke and creosote. Place a 2” strip of wax paper over this. Over-extend the latch ...

  • Page 20

    Page 20 of 32 b. Heating a pool or spa please contact a local pool/spa specialist if this boiler is to be used to heat a pool or spa. A stainless steel (or 90/10 copper/nickel alloy) tube & shell water-to-water heat exchanger must be used to transfer heat from the boiler to a pool or spa since the c...

  • Page 21

    Page 21 of 32 iv. Operation a. Wood requirements for maximum efficiency and burn times only burn wood that has been cut, split and seasoned for 12-24 months, sheltered from rain and snow. The wood should be split 6-8” in diameter and cut 12- 16” for the fastest seasoning and should be around 20% moi...

  • Page 22

    Page 22 of 32 caution! Flammable gases fill the firebox when idling. Pause at blowback catch for 30 seconds and then stand to the side when fully opening until smoke dissipates enough to see inside. Failure to do this can result in possible flashback to the face from gases igniting. Always stir ash ...

  • Page 23

    Page 23 of 32 clean ash out frequently and stir (break up) ash in all areas (especially corners) daily to prevent any “caking” (dense, compacted pockets most often occurring in corners). Caked up ash holds in moisture and failure to stir ash daily is one of the largest reasons for leaks in any wood ...

  • Page 24

    Page 24 of 32 re-installed or replaced with new rope. Contact nature’s comfort or your dealer for new rope or caulk if needed. This is a normal maintenance item and not a warranty issue. Clean and coat entire threaded portion of all bolts for fuel door with a never-seize product if needed. Adjusting...

  • Page 25

    Page 25 of 32 bleeder screw out, start the pump to finish bleeding all air out of the bearings, shut off the pump and re-install bleeder screw. The pump may now run. Always run at high speed for the best efficiency of the boiler and heat exchangers in the home. Inspection & maintenance: loosen the b...

  • Page 26

    Page 26 of 32 7. Pump: remove bleeder screw and flush, inspect and turn shaft with screwdriver. Seemaintenance section for further details. 8. Water treatment: make sure water is tested and has enough nature’s comfort water treatment. See warranty for further details. 9. Misc: sand and paint any rus...

  • Page 27

    Page 27 of 32 trouble shooting problem cause solution boiler does not come up to temperature. Green or soft wood is being used wind blowing under boiler use properly seasoned hard wood take one or two inches of hard board insulation and place under boiler between legs then add non-combustible spacer...

  • Page 28

    Page 28 of 32 copy of safety labels.

  • Page 29

    Page 29 of 32 1 ash pan 13 rear gable skin 25 blower damper 2 firebox door handle 14 right control frame 3 firebox door 15 control access door components on page 11 4 front skin 16 left control frame gfci 5 side skin 17 lower control jamb outlet 6 front gable skin 18 firebox door hinge switch 7 19 a...

  • Page 30

    Page 30 of 32 20 year limited warranty nature's comfort llc, of shipshewana, in 46565 warrants material and labor on any defects in workmanship on the fire drum for a period of 20 years from the purchase date to the original owner only (see proration below) and on the water jacket for a period of 10...

  • Page 31

    Page 31 of 32 customer warranty card please fill in the following information and keep for future reference. Name: ___________________________________ (first) (last) address: ___________________________________ (street) ___________________________________ (city) (state) (zip) phone: _________ ______...

  • Page 32

    Page 32 of 32 mail-in warranty card (information is never shared or sold) all fields must be filled out name: _________________________________________________________________ (first) (middle) (last) address: _________________________________________________________________ (street) ________________...