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Your HOTBLAST Furnace is designed to be a supplemental or 

central heating source for your home.  This Solid Fuel Furnace 

may  be  installed  in  conjunction  with  a  properly  operating 

central furnace that is listed or certified in accordance with 

nationally  recognized  safety  standards  and  equipped  with 

the  required  controls  and  other  safety  features  and  which 

has been installed in accordance with appropriate standards  

of the National Fire Protection Association with installation 

clearances specified in the furnace nameplate marking.  The 

installation must be accomplished by a qualified agency (one 

who is engaged in, and is responsible for, or is thoroughly 

familiar with the installation and operation of the gas, oil, and 

solid fuel burning heating appliances, who is experienced in 

such work, familiar with all the requirements of the authority 

having jurisdiction.)  The installation shall be in strict accordance 

with the manufacturer's installation instructions furnished with 

the solid fuel furnace.
The chimney connector of the furnace is to be installed to 

provide  clearances  to  combustible  material  not  less  than 

specified in the individual classifications and marked on the 

furnace.  The chimney connector must be connected to a 

chimney  suitable  for  use  with  residential  type  or  building 

heating appliances which burn solid fuel.
The Furnace is designed to operate in either parallel or series 

air flow arrangement with the central furnace or as a central 
furnace.

CENTRAL FURNACE INSTALLATION

As a central furnace, the unit functions independently of any 

other  system.  The  blower  will  come  on  when  the  plenum 
temperature reaches the setting on the blower control.

PARALLEL INSTALLATION (U.S. ONLY)

The design is such that when the blower comes on, the blower 

on the central system also comes on. The blower will only 

come on when the temperature in the plenum has reached 

the setting on the blower control.  This is to insure that there 

is sufficient warm air in the system to make it efficient for the 

unit to operate.  When the central system thermostat calls for 

heat, the central system will operate by the burner igniting 

and the blower coming on.  It is possible that both systems 

will operate simultaneously.  It is recommended that for the 

most efficient use of your HOTBLAST Furnace, that it be fired 

as much as possible in order to reduce the demand on your 

existing central heating system.  This unit has an optional 

forced draft kit that operates from a wall thermostat.  When 

the temperature falls below the setting on the wall thermostat, 

the forced draft will come on (U.S. Stove Option 11/DIKL)
The warm air supply outlet of the HOTBLAST Furnace shall 

not be connected to the cold air return of the central furnace, 

because the possibility exists of components of the central 

furnace overheating and causing the central furnace to operate 
other than is intended.

SERIES INSTALLATION

This type of installation uses only the blowers of the existing 

central  furnace.    The  solid  fuel  fan/limit  control  must  also 

control  the  functions  of  the  existing  furnace.   All  electrical 

power must come from a single branch circuit.

HOW THE FURNACE FUNCTIONS

Summary of Contents for 1357M

Page 1: ... FORCED AIR GAS OR OIL FIRED FURNACE U S ONLY FOR INSTALLATION AS A CENTRAL FURNACE ALL MODELS CERTIFIED UNDER UL 391 85591V 0602G CAUTION READALLINSTRUCTIONSCARE FULLY BEFORE STARTING THE INSTALLATIONOROPERATING THE FURNACE IMPROPER INSTALLATION MAY VOID YOUR WARRANTY DO NOT USE THIS FURNACE IN A MOBILE HOME OR TRAILER U S Environmental Protection Agency Certified to comply with 2015 particulate ...

Page 2: ...er or 5 16 Socket W Ratchet Safety Glasses MATERIAL 6 Pipe 6 Elbow Collar and Thimble as required 24 gauge min 1 2 Sheet Metal Screws 6 Inside diameter Listed Residential Type or Building Heating Appliance Chimney or existing masonry chimney Electrical Wiring 6 Draft Regulator 1 2 Conduit Conduit Connectors Furnace Cement Manufacturer Recommends Rutland Black Code 78 or Equivalent Plenum and Duct ...

Page 3: ...AFETY NOTICE If this heater is not properly installed a house fire may result For your safety follow the installation directions Contact local building or fire of ficials about restrictions and installation inspection requirements in your area If not already installed we recommend that smoke detectors be installed CAUTION CLEANOUT OF THE HEAT EXCHANGER FLUE PIPE CHIMNEY AND DRAFTINDUCER IFUSED ISE...

Page 4: ...A 211 The address of the NFPA is Batterymarch Park Quincy MA 02269 11 Keep the ashpit section free of excess ashes Do not al low ashes to stack higher than the sides of the ash pan 12 DISPOSAL OFASHES Place ashes in a metal container with a tight fitting lid Keep the closed container on a noncombustible floor or on the ground well away from all combustible materials Keep the ashes in the closed co...

Page 5: ...TRAL FURNACE INSTALLATION As a central furnace the unit functions independently of any other system The blower will come on when the plenum temperature reaches the setting on the blower control PARALLEL INSTALLATION U S ONLY The design is such that when the blower comes on the blower on the central system also comes on The blower will only come on when the temperature in the plenum has reached the...

Page 6: ...6 Figure 2 Model 1557M Figure 1 Model 1357M DIMENSIONS OF FURNACE ...

Page 7: ...ble surfaces If you have a solid brick or stone wall behind your furnace you can place the furnace as close as you wish to the wall If the wall is only faced with brick or stone treat it as a combustible wall 18 18 6 SOLID DAMPER 6 BAROMETRIC DRAFT REGULATOR NON COMBUSTIBLE FLOOR 12 9 48 18 CENTRAL FURNACE 6 CHIMNEY 21 Figure 4 Figure 5 1357M 1557M Unit to Sidewall 12 305mm 12 305mm Unit to Backwa...

Page 8: ...manufacturer s instructions Use only a Listed Residential Type or Building Heating Appliance Chimney If your chimney starts at the ceiling Fig 7 you will need enough 6 pipe to reach the ceiling The top of the chimney must be at least 3 feet above the roof and be at least 2 feet higher than any point of the roof within 10 feet Fig 7 IMPORTANCE OF PROPER DRAFT Draft is the force which moves air from...

Page 9: ... same room same pressure zone as the furnace 8 Install the barometric draft regulator strictly in accordance with the instructions that are provided with the barometric draft regulator 9 A solid damper must be used in the chimney connecting pipes be tween the flue collar and the chimney When used in conjunction with a barometric draft regulator the solid damper must be placed between the barometri...

Page 10: ...ow to connect the chimney connector of a heater to a masonry chimney through a combustible wall There are five allowable ways that a chimney connector can be connected to a masonry chimney by passing through a combustible wall NFPA Standard 211 allows the following wall pass through systems Figure 11 ...

Page 11: ...ATTACH CONNECTOR SECURELY AIR SPACE inner surface of the chimney flue and shall be firmly cemented in place See Part A 2 Use a solid insulated listed factory built chimney length having an inside diameter of 6 and having 1 or more of solid insulation There must be at least a 9 air space between the outer wall of the chimney length and any combustible materials The inner end of the chimney length s...

Page 12: ... thermal conductivity of 1 0 Btu in ft F 4 88 kg cal hr m C or less 2 All clearances and thicknesses are minimums larger clear ances and thickness are acceptable 3 A chimney thimble as shown for 3 and 4 above Parts C and D shall be for types 3 and 4 connections to facili tate removal of the chimney connector for cleaning The chimney thimble shall be of ASTM C315 fireclay with 5 8 minimum wall thic...

Page 13: ...uired to lock feed door during firing sequence 4 Install the thermodisc on rear of furnace cabinet with the two screws provided Mount the conduit assembly from the junction box to the thermostat bracket Crimp the two female terminals to each of the wire leads Plug the wires to the thermodisc NOTE It does not matter which of the two wires plugs to which terminal on the thermodisc 5 Remove blowers f...

Page 14: ... wiring wires M1 M2 of one blower motor Wire leads from the distribution blower are usually BOTH BLACK Makes no difference which leads from the motor s connects to the corresponding leads coming out of the conduit Figure 16 WIRING DIAGRAM ...

Page 15: ...specificmodel Sealthesmokepipeinthechimneywithfurnacecement The chimney connector shall be securely supported and joints fastened with sheet metal screws or rivets e Install 8 diameter heat pipe to plenum of the central hot air furnace Use 26 gauge pipe and connectors to be purchased separately If central air conditioning is installed in the plenum install heat pipe above the air conditioning unit...

Page 16: ...this purpose and install the new gasket You may light up your stove again approximately24hoursafterhavingcompletedthisoperation This unit s ash door uses a 5 8 diameter rope gasket This unit s feed door uses a 1 2 diameter rope gasket SERVICE HINTS Do not expect a furnace to draw It is the chimney that creates the draft Smoke spillage into the house or excessive build up of water or creosote in th...

Page 17: ...el B Check length of flue pipe to chimney Your unit should be within six 6 feet of your chimney C Make sure chimney cap is not too close to the top of the chimney D Check chimney draft make sure chimney flue pipe is clean and chimney is of adequate height E Slide baffle should be pulled out prior to load door opening 4 Problem Distribution blower vibrating Solution A Tighten blower wheel to motor ...

Page 18: ...18 Repair Parts 22 6 8 7 9 20 18 19 17 16 14 10 15 11 12 13 21 1 5 2 3 4 1 28 27 26 29 30 31 24 25 32 33 23 35 34 38 37 36 40 38 36 37 39 34 42 41 46 48 47 44 43 45 49 1357M 1557M 69399 ...

Page 19: ...wer 1357M 1 1557M 2 27 89319 Gasket Blower 1357M 1 1557M 2 28 83340 1 4 20 Clipnut 1357M 4 1557M 8 N S 83339 Bolt 1 4 20 x 3 4 1357M 4 1557M 8 29 22140 Relay Box Bracket 1 30 80131 Junction Box 4 x 4 1 31 80231 Junction Box Cover 1 32 80314 Thermodisc 60T12 1 33 68234 Blower Thermostat Bracket 1 34 89066 Firebrick 4 5 x 9 x 1 25 1357M 10 1557M 12 35 40264 Liner Front Rear 1357M 2 36 40256 Grate Fr...

Page 20: ...uses a standard 16 x 20 x 1 filter NOT INCLUDED to reduce the amount of dust particles from being transfered thru you duct work system DR 6 BAROMETRIC DAMPER REGU LATOR In the unlikely event that your furnace overfires a con dition evidenced by elbows stove pipes and connectors glowing red in appearance or otherwise discoloring then your installation is subject to excessive draft cre ated by eithe...

Page 21: ...himney s or installations are going to be the same Just remember to allow enough air to enter the firebox and keep the stove pipe damper open so that volatiles are properly burned Before refueling take the time to break up the cone a little with a poker especially if it has caked over or formed a crust But be careful not to mix the coal as this increases the chances of forming clinkers When shakin...

Page 22: ...efueling If possible avoid shaking as a heavier layer of ash will help reduce the intensity of the fire during this time After loading let the fire establish itself for about 30 minutes Then close your damper and automatic control to the point where the house does not become too cold It is important that you begin banking early enough before retiring or leav ing that you can make necessary adjustm...

Page 23: ...23 CENTRAL INSTALLATION CENTRAL INSTALLATION ADD ON INSTALLATION ...

Page 24: ...AIR RETURN TOEXISTING DUCTWORK WARMAIR EXISTING FURNACE SOLIDFUEL FURNACE FILTERBOX PLENUM COLLECTOR BOX COLDAIR RETURN TOEXISTING DUCTWORK WARMAIR EXISTING FURNACE SOLIDFUEL FURNACE FILTERBOX COLDAIR RETURN PLENUMTOP OPTIONAL Appendix INSTALLATION A INSTALLATION B INSTALLATION C ...

Page 25: ...25 INSTALLATION D INSTALLATION E ...

Page 26: ...26 INSTALLATION F INSTALLATION G ...

Page 27: ...27 INSTALLATION H TOP VIEW FRONT VIEW ...

Page 28: ...ompany ________________________________________ Telephone No ______________________________________ Stove Inspected Chimney Swept Items Replaced ____________________________________ Service 05 Date ________________________ Engineer Name _____________________________________ Company __________________________________________ Telephone No ______________________________________ Stove Inspected Chimne...

Page 29: ... 4 Damage or defect caused by improper installation accidents misuse abuse including overfiring or alteration 5 Transportation or shipping costs LIMITATIONS AND EXCLUSIONS 1 United States Stove Company shall not be liable for incidental consequential special or contingent damages anyone might suffer as a result of their breach of this written warranty or any implied warranty 2 Should the heater be ...

Page 30: ...30 NOTES ...

Page 31: ...31 NOTES ...

Page 32: ...CHED TO THE HEATER WHEN ORDERING REPAIR PARTS ALWAYS GIVE THE FOLLOWING INFORMA TION AS SHOWN IN THIS LIST 1 THE PART NUMBER__________________________________ 2 THE PART DESCRIPTION______________________________ 3 THE MODEL NUMBER________________________________ 4 THE SERIAL NUMBER________________________________ United States Stove Company 227 Industrial Park Road P O Box 151 South Pittsburg TN 3...

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