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INTRODUCTION 

 
 

The Alternate Heating Systems used oil-fired furnaces have been specifically designed for 
burning No. 2 fuel oil, used motor oil, transmission oil, and mixtures not exceeding 50 SAE.  
These furnaces have unique features not found in conventional furnace designs. 
 
Alternate Heating Systems manufactures the furnace vessel to ASME standards.  Used oil 
combustion technology differs significantly from burners designed for No. 2 fuel oil only.  
Additionally, used oil combustion in the furnace can produce adverse results not 
encountered in warm air heat exchangers. 
 
Fast access to the fire tubes is provided by the large doors on the rear and front of the 
furnace.  

CAUTION:  Do not open the access door unless the power has been turned 

off

.  

 
This furnace must be installed by a qualified technician, knowledgeable in hot water heating 
system design requirements. 
 
These furnaces may have one or more hot water heating coils to produce domestic hot water 
for car washes, shower, etc.  Consult the enclosed diagram for an appropriate method for 
piping the domestic coils.  If the furnace coil serves hand taps it must have a tempering 
valve to ensure that excessively hot water does not contact humans. 
 

IMPORTANT:  Furnace temperature must be around 180

0

 
 

If anything in this manual is unclear or technical assistance is required, contact your 
authorized representative or call Alternate Heating Systems at 717-987-0099. 

 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for AHS250

Page 1: ...ED FURNACE Owner s and Operator s Manual Models AHS250 AHS500 All Installations Must Be In Accordance With State and Local Codes Alternate Heating Systems 2393 Little Egypt Road Harrisonville PA 17228 Telephone 717 987 0099 Fax 717 987 0055 ...

Page 2: ...rovided by the large doors on the rear and front of the furnace CAUTION Do not open the access door unless the power has been turned off This furnace must be installed by a qualified technician knowledgeable in hot water heating system design requirements These furnaces may have one or more hot water heating coils to produce domestic hot water for car washes shower etc Consult the enclosed diagram...

Page 3: ... to cool could result in severe injury or death and damage to property OVERFLOW PIPE Plumbing from the overflow pipe should direct the flow toward the floor preferably near a floor drain BURNER DOOR A lock nut and hair pin should always be used on the burner door to ensure that it does not open during operation STOP BEFORE FIRING THE BURNER THE FURNACE HEATING SYSTEM MUST TO BE FULL OF WATER Firin...

Page 4: ... will shut the burner down some most Hi Limits have a manual reset ELECTRICAL CONNECTIONS Heat is provided by the primary control on the burner We have a very simple electrical hook up When installing your burner to the AHS Waste Oil Furnace just locate the cable with 2 conductor thermostat wire red white black coming from the junction box on the side of the furnace to your burner Then find the th...

Page 5: ......

Page 6: ...n Battery March Park Quincy Massachusetts 02269 N F P A No 30 Flammable and Combustible Liquids Code N F P A No 31 Standard for Installation of Oil Burning Equipment N F P A No 88A Standard for Parking Structures N F P A No 88B Standard for repair Garages N F P A No 211 Standard for Chimney Fireplaces Vents and Solid Fuel Burning Appliances The installation of equipment in Canada must consider the...

Page 7: ...or hot tub should be considered Rigging and Positioning of Furnace Do not attempt to move or off load the furnace without the aide of a crane or dolly Most waste oil models have a lifting lug in the center of the top while on some units two lifting lugs in the front and rear are provided Once on the floor level where it will be installed the unit may be rolled on pipe or by means of a pallet jack ...

Page 8: ...sions are made to supply adequate air to the furnace room This air supply is necessary to insure complete combustion a clean fire and to prevent nuisance shut downs due to excessively dirty burner parts Air from the outside may be provided through ducts fixed louvers or motorized louvers BOILER CONDITIONER SEALANT AHS provides two bottles of Boiler Conditioner Sealant with the purchase of your boi...

Page 9: ...n hot water heaters There are three methods for plumbing the domestic coil One way is to connect the coil in series with an existing hot water heater PLUMBING COIL IN SERIES A second method is to connect the coil in parallel with an existing water heater so that the conventional water heater may be used when the waste oil boiler is not being fired in the summer for example The diagram below indica...

Page 10: ... a tempering valve must be included to limit the temperature of the water at the faucet to a safe level The third method uses a small pump to circulate water continuously between the coil and existing hot water heater It is also necessary to include a tempering valve on the supply side of the storage tank water heater ...

Page 11: ...uld be noted that under actual operating conditions the temperature drop usually is considerably less than that for which the system is designed and will not appreciably affect the outputs of the heat distributing units The temperature drop provides a starting point for determining the number of BTU H which will be delivered to the heat distributing units by the circulation of each gallon of water...

Page 12: ... delivered by the system when one GPM is circulated through the system The proper pump capacity is determined by dividing the calculated BTU H heat loss of the structure by the BTU H carrying capacity of each gallon per minute calculated In a system designed for a 20 degree water temperature drop one GPM equals 10 000 BTU H ...

Page 13: ... those who are charged with the responsibility of furnace maintenance A log of the following items should be maintained in the furnace room at all times A sample recording sheet is the rear of the section Daily furnace check maintenance list 1 Observe operating levels are normal 2 Observe operating temperatures are normal 3 Listen for any unusual noises and correct as necessary Weekly furnace chec...

Page 14: ...ve soot has built up on the flue passages they can be cleaned following this procedure 1 Open the front cleanout doors Care must be taken when removing these doors not to damage the insulating ceramic board Be sure electric power is off to prevent accidental burner firing 2 Remove the smoke hood access panel and gasket on rear of furnace 3 Using a flue brush brush the accumulated soot and scale st...

Page 15: ...AHS WASTE OIL FURNACE DIAGRAM ...

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