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© 2021 United States Stove Company

short blue flames above the coal, except when the fire 

is started or a new charge is added. If, however, there is 

no flame then the fire needs more air from the bottom 

(unless it is near the end of its burn cycle and needs to 

be recharged). Only when the coal is burned down to half 

its original depth it is time to add fresh coal. When doing 

so, open the stove pipe damper and turn the thermostat 

damper to high, which will allow the fire to burn off any 

accumulated gases. Open the feed door, and with a small 

rake, hoe, or hooked poker pull the glowing coals to the 

front of the firebox. Try not to disturb the fire too much. 

Next, add a fresh charge to the back being careful not to 

seal off the top. Close the feed door, but leave the spin 

damper (or thermostat) open for a few minutes until 

the volatile gases have burned off. It is not necessary to 

shake down the ashes each time you refuel the furnace. 

Experience will be your best teacher.

BANKING THE FIRE

For extended operation, such as overnight, the fire will 

need to be banked. To do so heap coal up along the sides 

and back of the firebox so that the fire gradually burns 

it over a longer period of time. The intensity of the fire 

will also be reduced without letting it go out. Follow the 

same procedure to refuel. 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 leaving that you can make 

necessary adjustments after the fire is well established. 

To revive a coal fire that is almost out, (1) open the ash 

door and stove pipe damper and close the spin damper 

under the door to get a good draft through the grate. (2) 

place a thin layer of dry coal over the entire top of the fire. 

DO NOT POKE OR SHAKE THE FIRE AT THIS TIME! 

(3) 

after the fresh coal has become well ignited shake the 

grate (just a little), refuel. 

WARNING:

•  DO NOT BURN COKE, CHARCOAL, HIGH 

VOLATILE BITUMINOUS COAL, SUB 

BITUMINOUS, LIGNITE OR CANNEL COAL 

(SOMETIMES CALLED CHANNEL COAL OR 

CANDLE COAL).

•  NEVER BURN WAX OR CHEMICALLY 

IMPREGNATED SAWDUST LOGS - THEIR 

INTENDED USE IS FOR FIREPLACES ONLY.

•  NEVER FILL THE STOVE OR FURNACE ABOVE 

THE FIREBRICK OR CAST IRON LINER.

For Parts Assistance Call: 800-750-2723 Ext 5051 or Email: parts@usstove.com

The information in this owner’s manual is specific to your unit. When ordering replacement parts the information 

in this manual will help to ensure the correct items are ordered. Before contacting customer service write down the 

model number and the serial number of this unit. That information can be found on the certification label attached 

to the back of the unit. Other information that may be needed would be the part number and part description of the 

item(s) in question. Part numbers and descriptions can be found in the “Repair Parts” section of this manual. Once 

this information has been gathered you can contact customer service by phone 1-800-750-2723 Ext 5051 or Email  

parts@usstove.com.

Model Information

Model Number
Serial Number

HOW TO ORDER REPAIR PARTS

A GUIDE TO BURNING COAL

Summary of Contents for HOTBLAST 1500

Page 1: ...act local building or fire officials about permits restrictions and installation requirements in your area NEVER OPERATE THIS PRODUCT WHILE UNATTENDED CAUTION Please read this entire manual before you...

Page 2: ...LEL INSTALLATION WITH EXISTING FORCED AIR GAS OR OIL FIRED FURNACE U S ONLY FOR INSTALLATION AS A CENTRAL FURNACE CAUTIONS HOT WHILE IN OPERATION KEEP CHILDREN CLOTHING AND FURNITURE AWAY CONTACT MAY...

Page 3: ...and_____________________________________________ If no Date of inspection of existing venting system ________________________________________________________________ COMMISSIONING Confirm Hearth Pad I...

Page 4: ...WHEN ADDING FRESH COAL DANGER RISK OF FIRE OR EXPLOSION DO NOT BURN GARBAGE GASOLINE DRAIN OIL OR OTHER FLAMMABLE LIQUIDS WARNING FIRE HAZARD DO NOT OPERATE WITH FIRE DRAFT EXCEEDING 0 06 W C DO NOT...

Page 5: ...until some pressure is required to lock feed door during firing sequence 5 Install the thermodisc on rear of furnace cabinet with the two screws provided Mount the conduit assembly from the junction b...

Page 6: ...k will attach to It uses a standard 16 x 20 x 1 filter NOT INCLUDED to reduce the amount of dust particles from being transferred thru you duct work system DR 6 BAROMETRIC DAMPER REGULATOR In the unli...

Page 7: ...he 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 ensure that there is sufficient warm air in the...

Page 8: ...factors Too much draft may cause excessive temperatures in the appliance Inadequate draft may cause backpuffing into the room and plugging of the chimney Inadequate draft will cause the appliance to...

Page 9: ...or cement the clay liner in place to the chimney flue liner Method B 9 228 6 mm Clearance to Combustible Wall Member Using a 6 152 4 mm inside diameter listed factory built Solid Pak chimney section...

Page 10: ...have the same diameter as the furnace outlet If this is not the case we recommend you contact your dealer in order to ensure there will be no problem with the draft The furnace pipe must be made of a...

Page 11: ...stated on the label on the fuel door c Clearance from combustible materials must comply with those stated on the label on the side of the unit Refer to the clearance table in the front of this manual...

Page 12: ...12 2021 United States Stove Company CENTRAL INSTALLATION ADD ON INSTALLATION INSTALLATION METHODS OF INSTALLATION...

Page 13: ...ON B PLENUM COLLECTOR BOX TO EXISTING DUCT WORK WARM AIR EXISTING FURNACE SOLID FUEL FURNACE FILTER BOX COLD AIR RETURN INSTALLATION C PLENUM TOP OPTIONAL TO EXISTING DUCT WORK WARM AIR EXISTING FURNA...

Page 14: ...LATION F FURNACE PLENUM EXISTING FURNACE SOLID FUEL FURNACE COLD AIR RETURN 2 min CLEARANCE INSTALLATION G SOLID FUEL FURNACE 2 min CLEARANCE COLD AIR RETURN TO FILTER BOX INSTALLATION H SOLID FUEL FU...

Page 15: ...heater ineffective and cause smoke POWER FAILURE After loss of power remove the filter if provided and do not expect to keep home at normal temperatures ADJUSTING THE BAROMETRIC DRAFT REGULATOR 1 Dril...

Page 16: ...be used to ventilate the cellar or basement If there is a cleanout opening at the base of the chimney it must be closed tightly 4 If the chimney is operating too cool water will condense in the chimn...

Page 17: ...and rough handling or abuse When installing your furnace use care in handling Clean with soap and warm water when furnace in not hot DO NOT use any acids or scouring soap as these wear and dull the fi...

Page 18: ...15 seconds and open door SLOWLY then refuel Check length of flue pipe to chimney Your unit should be within six 6 feet of your chimney Make sure chimney cap is not too close to the top of the chimney...

Page 19: ...e Burning in this fashion allows heat to drive off the volatile gases and turbulence created increases the burn efficiency There will have to be some experimenting with the individual setup as no two...

Page 20: ...ere the house does not become too cold It is important that you begin banking early enough before retiring or leaving that you can make necessary adjustments after the fire is well established To revi...

Page 21: ...2021 United States Stove Company 21 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 41 39 37 38 40 34...

Page 22: ...Kep Nut 2 21 68228 Ash Pan 1 22 23398 Flue Baffle 2 23 22761B Flue Collar Ring 1 24 22762B Forced Draft Ring 1 25 86402 1 1 2 Pipe Plug 1 26 80230 Blower 2 27 89319 Gasket Blower 2 28 83340 1 4 20 Cl...

Page 23: ...75 Thermostat Knob 1 10 23425 Handle Bracket 2 11 89520 Wooden Handle 1 12 86318 Thermostat Chain 1 2 ft 13 68217 Feed Door Assembly Includes Door and Gasket 1 N S 83106S Machine Screw 10 24 x 1 2 SL...

Page 24: ..._____ Engineer Name _____________________________________ License No _________________________________________ Company ___________________________________________ Telephone No ________________________...

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