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Lighting the Water Heater

Before lighting or re-lighting your
water heater, make sure that you
have read and understood all of the
instructions and warnings in this
manual and on your water heater. If

you have any questions about lighting your water
heater, immediately contact a qualified installer, serv-
ice agency or the oil supplier.

Do not light this water heater if:

• It is not full of water.
• Excess oil has accumulated.
• The combustion chamber is hot.
• Gasoline or other flammable vapours and 

liquids have been stored in the vicinity of 
the water heater.

Failure to follow these instructions can result in
property damage, personal injury or death.

Lighting the Burner

Set the aquastat slightly above the tank’s water tem-
perature. The burner should start. It may be 
necessary to press the reset button on the primary
combustion control relay. After a short period of time,
the water should reach the temperature setting on
the aquastat and the oil burner should stop. Adjust
the aquastat setting to the desired water tempera-
ture. The water heater should be operated for a mini-
mum of 10 to 15 minutes to reach steady state con-
ditions before fine tuning combustion. The warm up
time is ideal for testing the oil pump pressure.

Water Temperature  Regulation 

The higher the setting, the greater the risk of scald-
ing. Hot water can cause third degree burns in
under one (1) second at 160˚F (71˚C), in five (5)
seconds at 140˚F (60˚C) and in thirty (30) seconds
at 130˚F (54˚C). In households where there are
children, physically challenged individuals or elderly
persons, mixing valves for point of use are neces-
sary as means of reducing the scalding potential of
hot water.

Once installed, the operation of this water heater will
be completely automatic. The aquastat on the water
heater is adjustable and will maintain the water at the
desired temperature. Contact a qualified service
technician for adjustment. Set the aquastat as low as
possible to provide an adequate supply of hot water.

This will conserve oil and extend the life of the water
heater.

When hot water is drawn from the tank in frequent
short bursts, a condition known as “stacking” is 
created. “Stacking” is the result of increased cycling
of the burner and can produce very hot water 
temperatures at the hot water outlet. Always remem-
ber to check the hot water coming out of any faucet
with your hand before use. This will reduce the risk of
scalding-related injury.

14

OPERATING INSTRUCTIONS

WARNING

WARNING

Summary of Contents for RESIDENTIAL OIL-FIRED WATER HEATER

Page 1: ... not entirely followed a fire or explosion may result causing property damage per sonal injury or death DO NOT STORE use gasoline or any other flammable vapours or liquids in the vicinity of this or any other appliance DO NOT USE gasoline crank case oil or oil containing gasoline DO NOT TAMPER with the unit or controls DO NOT LEAVE paper or rags close to the burner or the water heater WHAT TO DO I...

Page 2: ...ntilation Air Supply 3 Requirements for Unconfined Spaces 4 Requirements for Confined Spaces Indoor Combustion and Ventilation Air 4 Requirements for Confined Spaces Outdoor Combustion and Indoor Ventilation Air 4 Requirements for Confined Spaces Outdoor Combustion and Ventilation Air 4 Air duct sizing 5 Louvers and Grilles 6 Corrosive Atmospheres 6 Venting 6 Chimney requirements 6 Flue piping 6 D...

Page 3: ...heater to operate properly it must be supplied with an uninterrupted flow of clean combustion and ventilation air The area around the water heater must always be kept clean and clear of debris An inadequate supply of air to the water heater will produce a bright yellow burner flame causing soot ing in the combustion chamber on the burner and in the flue tube This can result in damage to the water ...

Page 4: ...ly communi cating with interior areas that have in turn adequate infiltration from the outdoors Requirements for Confined Spaces Outdoor Combustion and Indoor Ventilation Air A water heater that is located in a confined space and that obtains its combustion air from outdoors and ventilation air from within the conditioned space of the building should be provided with two permanent openings one nea...

Page 5: ...losure b horizontal duct s as shown in Figure 7 with an equivalent length of less than 50 ft 15 m having a free flow area of not less than one 1 square inch per 2 000 BTU h 11 cm2 kWh of the total input of all oil fired appliances in the enclosure and c air openings that communicate directly with the outdoors as shown in Figure 6 having a free flow area of not less than one 1 square inch per 4 000...

Page 6: ...nnected to a ver tical chimney The chimney must be properly con structed and sized clean and free of soot creosote and obstructions able to generate sufficient draft to evacuate the products of combustion outdoors and be lined with a tile or metal liner Inspect the chimney and make any repairs necessary before installing the water heater To prevent downdrafts the chimney flue should extend at leas...

Page 7: ...tional Electrical Code NFPA 70 in the United States Before installing the switch remember to DIS CONNECT THE POWER SUPPLY to the water heater Failure to follow these instructions can result in property damage personal injury or death Installation 1 Install the pre assembled flue collar blocked vent switch assembly over the flue outlet on the water heater see Figure 9 2 Wire the switch to the aquas...

Page 8: ...is imperative that open flame is not applied to the inlet and outlet fittings as heat will damage or destroy the plastic lined fittings This will result in premature failure of the fittings which is not covered by the warranty 8 INSTALLATION INSTRUCTIONS FLUE COLLAR BLOCKED VENT SWITCH VENT PIPE FLUE OUTLET MANUAL RESET BUTTON FLUE COLLAR BLOCKED VENT SWITCH ASSEMBLY Figure 9 Figure 10 1 Flue coll...

Page 9: ...ystem When the water heater operates the heated water expands creating a pressure build up This is a natural function and is one of the reasons for installing a temperature and pressure relief valve If the cold water supply line has a built in water meter check valve or pressure reducing valve a suitable expansion tank must be installed to prevent pressure build up or water hammer effect Otherwise...

Page 10: ... proper burner settings Wiring This water heater uses an external electrical source for power It must be electrically grounded in accordance with all local codes or in the absence of such codes the latest edition of the CSA C22 1 Canadian Electrical Code in Canada and or the latest edition of the National Electrical Code NFPA 70 in the United States Failure to properly ground this water heater can...

Page 11: ... piping would have been in the past treated with chemicals for cleaning or sealing the system 3 If this water heater is to be used for space heating make sure that all safety codes are respected Pay special attention to safety valve pressure and expansion tanks Figure 11 L1 N Aquastat Fuse L1 N Gnd Oil Burner Junction Box Electrical Wiring Diagram For White Rodgers Aquastat Model 11B76 Black White...

Page 12: ...rom the water heater relief valve and premature failure of the heater due to expansion of the water during the heating cycle 7 Before acquisition of a water heater for space heating application it is necessary to have the area of intended use sized by a qualified technician This will ensure that an adequate water heating capacity will be available for both heating and potable water supply and that...

Page 13: ...e blocking effect of louvers and grilles L Venting Is the flue baffle installed in the flue tube L Has the water heater been vented separately from all other oil fired appliances L Have all horizontal runs of vent pipe been installed with a minimum rise of 1 4 inch per foot 21 mm m of run L Water Piping Is the dip tube installed in the cold water inlet L Has a temperature and pressure relief valve...

Page 14: ...ditions before fine tuning combustion The warm up time is ideal for testing the oil pump pressure Water Temperature Regulation The higher the setting the greater the risk of scald ing Hot water can cause third degree burns in under one 1 second at 160 F 71 C in five 5 seconds at 140 F 60 C and in thirty 30 seconds at 130 F 54 C In households where there are children physically challenged individua...

Page 15: ... Excess combustion air causes a bright roar ing fire and high stack temperatures resulting in poor fuel efficiency After the burner has been firing for 10 15 minutes take a smoke sample with a Bacharach smoke sampler or other approved device Then take a sam ple of the flue gases and test for CO using a combus tion analyser The smoke spot should not exceed Trace on the Bacharach Scale The water hea...

Page 16: ...he life expectancy of the water heater is reduced where a water softener is introduced to fight hard water because the sodium salts added by a softener make this water extremely conductive In these conditions the anodes are consumed more rapidly and should be verified every year In certain water conditions the anodes will react with the water producing discoloured or smelly water The most common c...

Page 17: ...y phone at 1 800 363 9354 To help serve you in a quick and efficient way always have the following information ready a Model number b Serial number c Date of installation d Where the water heater was purchased e Complete address where the water heater is installed f A description of the problem 1 2 3 4 5 7 8 6 9 10 I D Description 1 Aquastat 2 Oil burner 3 Brass drain valve 4 Overflow tube 5 Dip t...

Page 18: ...mage caused by not having the water heater installed adjacent to a free flowing drain in the event of water leakage 10 If the heater is operated at water temperatures exceeding the maximum setting of the operating or high limit control or the heater is not supplied with potable water free to circulate at all times 11 If the heater has experienced the effect of thermal expansion due to excessive pr...

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