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| VENT |
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| DRAFT | RISE 20mm/m | |
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| REGULATOR | (1/4 in./ft.) | |
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| FILL CAP |
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| SERVICE |
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| BLOCKED VENT |
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| SWITCH |
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| SAFETY SWITCH |
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| LEVEL |
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| GAUGE | T&P VALVE | ||||||||
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| OIL |
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| AQUASTAT |
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| OPERATING |
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| STORAGE | INSTRUCTIONS |
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| TANK |
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| CUT OFF VALVE |
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| OIL FILTER | OIL | ||||
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| BURNER | |
Figure 4 | Installation Diagram |
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Air Requirements |
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| Houses built in accordance with the “National Building | ||||||||||||||
An adequate supply of combustion and ventilation air is | Code of Canada, 1985” (or subsequent edition), with | |||||||||||||||||||||
required to: |
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| extensive exterior stucco coating, or with a sealed vapour | ||||||||||||
• Ensure proper combustion. |
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| barrier or other similar air sealing technique, will often be | ||||||||||||||
• Reduce risk of property damage, severe bodily injury or | sufficiently airtight so that there is not sufficient air for both | |||||||||||||||||||||
combustion and venting the products of combustion of an | ||||||||||||||||||||||
death from possible flue gas leakage and carbon monox- | ||||||||||||||||||||||
ide emissions. |
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| exhaust devices within the house. |
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Do not install an exhaust fan in the same room as the water |
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heater. |
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| Outdoor Combustion & Ventilation Air | ||||||||||||
Satisfactory combustion cannot be sustained in an area that | ||||||||||||||||||||||
(Unconfined space) |
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is not provided with fresh air. Fresh air contains oxygen that | If the water heater is installed in an unconfined space in a | |||||||||||||||||||||
is necessary for proper combustion. If the water heater is | ||||||||||||||||||||||
building having insufficient infiltration, additional air for com- | ||||||||||||||||||||||
installed in a confined space, sufficient fresh air must be | ||||||||||||||||||||||
bustion and ventilation shall be obtained from outdoors or | ||||||||||||||||||||||
drawn in from outside of the enclosure. |
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| from spaces freely communicating with the outdoors. Under | |||||||||||||||||||
NOTE: Lack of adequate fresh air supply may cause a | ||||||||||||||||||||||
these conditions, permanent opening(s) shall be provided | ||||||||||||||||||||||
poor flame. |
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| so that the total air received through these openings will be | ||||||||||||||
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Air Supply |
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| at least as much as would be admitted by openings having | |||||||||||||
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| a total free area of 4.5 cm2/kWh (1 in2/5000 Btu/h) of the | ||||||||||||||
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| total input rating of all | ||||||||||||
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| CAUTION |
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| Outdoor Combustion & Ventilation Air (Confined | |||||||||||||||||
If an |
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arate outside | air duct | must | be used and |
| space) |
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ducted | to the | furnace | room | and/or room |
| A heater installed in a confined space that obtains all of its | ||||||||||||||||
| air for combustion and ventilation from outside the building | |||||||||||||||||||||
where the water heater is located. |
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| shall be provided with two permanent openings, one near | |||||||||||||||||||||
In Canada: |
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| the top of the enclosure and another near the bottom. Each | |||||||||||||
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| opening shall communicate directly or by means of ducts | ||||||||||||||
If the water heater is installed in a house built to the require- | ||||||||||||||||||||||
with the outdoors or to such spaces (such as a crawl space) | ||||||||||||||||||||||
ments of the “National Building Code of Canada, 1985”, | ||||||||||||||||||||||
that freely communicate with the | outdoors, and shall be | |||||||||||||||||||||
or a subsequent edition, the space shall be provided with air | sized in accordance with “Air Duct Sizing”. | |||||||||||||||||||||
inlets as outlined below, or have a mechanical | ||||||||||||||||||||||
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system of sufficient equivalent capacity. If a mechanical air- | Outdoor Combustion Air & Indoor Ventilation | |||||||||||||||||||||
supply system is used, it shall be interlocked to the appli- | Air (Confined space) |
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ance or equipment. |
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| An appliance located in a confined space that obtains its | |||||||||||||
NOTE: In unconfined spaces in buildings of conventional | ||||||||||||||||||||||
combustion air from outdoors and ventilation air from within | ||||||||||||||||||||||
frame, brick, or stone construction built prior to the require- | the conditioned space of the building shall be provided with | |||||||||||||||||||||
ments of the “National Building Code of Canada, 1985”, | ||||||||||||||||||||||
two permanent openings for ventilation. One located near | ||||||||||||||||||||||
and not subsequently significantly | the top of the enclosure and another near the bottom. Each | |||||||||||||||||||||
normally adequate to provide air for combustion and some | ||||||||||||||||||||||
opening |
| shall have a free area | of not less than 19.5 | |||||||||||||||||||
ventilation; | however, there may be notable exceptions. |
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cm2/kWh (1 in2/1000 Btu/h) of the total input rating of all | ||||||||||||||||||||||
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– 9 –