Dettson Lowboy 154 Series, Installation Instructions And Homeowner'S Manual

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the chimney lining and dimensions must conform to local
and national codes.
2.5.2 Factory-built chimneys
Oil fired furnaces are approved for use with “L” type
vents . The unit may also be used with an approved
chimney of proper dimensions and temperature ratings
as specified in the installation code. Refer to chimney
manufacturer’s instructions for proper installation.
2.5.3 Draft regulator
It is recommended that a draft regulator be installed in
cases where the draft is either high or variable due to
external conditions. Follow the instructions provided with
the regulator.
2.5.4 Side wall venting
The heating unit is approved for side-wall venting.
This system includes model VTK-54 / VTK-098 /
KLAVT0101DET side-wall venter and a 4” insulated vent
pipe, model IFV-410 / IFV098-10 / KLAFV0101DET, IFV-
420 / IFV098-20 / KLAFV0201DET. Refer to the installa-
tion instructions provided with the venting system.
2.6 BLOCKED VENT SHUT-OFF
DEVICE (BVSO) FOR CHIMNEY
VENTING
CAUTION
It is imperative that this device be installed by a quali-
fied service technician.
A positive pressure venting system (Sealed Combus-
tion System or Direct Vent) MUST NOT use the BVSO.
Follow the instructions supplied with the venting sys-
tem.
This device is designed to detect the insuf-
ficient evacuation of combustion gases in the
event of a vent blockage. In such a case
the thermal switch will shut down the oil burner.
The device will then need to be re-armed MANUALLY.
Refer to the detailed instructions and wiring diagrams
supplied with the BVSO for the installation and wiring
procedures. The length of wires supplied with the unit
is such that the safety device must be installed between
the flue outlet of the appliance and the draft regulator, as
indicated in the instructions.
It is also essential that the BVSO be maintained annually.
For more details refer to the instructions supplied with the
device itself, as well as in section 4 of this Manual.
2.6.1 BVSO Functional Test
The purpose of the following test is only to check that the
electrical outlet on the furnace, designated to the BVSO,
is functional only.
1. Start up the burner;
2. Remove the three-pole plug from the BVSO outlet
on the furnace;
3. The burner must shut-off immediately, while the
blower continues to run to the end of the cool-down
cycle.
If the test is not in line with the above, call a QUALIFIED
SERVICE TECHNICIAN.
2.7 COMBUSTION AIR SUPPLY
AND VENTILATION
WARNING
P
OISONOUS CARBON MONOXIDE GAS HAZARD
.
Comply with NFPA 31 (U.S.) and CSA B139
(Canada) standards for the installation of Oil Burn-
ing Equipment and applicable provisions of local
building codes to provide combustion and ventila-
tion air.
Failure to provide adequate combustion and ven-
tilation air can result in death, bodily injury and/or
property damage.
Oil furnaces must have an adequate supply of combus-
tion air.
It is common practice to assume that older
homes have sufficient infiltration to accommodate the
combustion air requirement for the furnace. However,
home improvements such as new windows, doors, and
weather stripping have drastically reduced the volume of
air infiltration into the home.
Refer to oil furnace installation codes relative to com-
bustion and ventilation air requirements. Consult Section
2.1.1 in this manual, specifically for units installed in an
enclosed space.
Home air exhausters are common.
Bathroom and
kitchen fans, power vented clothes dryers and water
heaters all tend to create a negative pressure condition in
the home. Should this occur the chimney becomes less
and less effective and can easily downdraft. In certain
cases, mechanically supplied air, by way of a blower, in-
terlocked with the unit, is necessary. It is the installer’s
responsibility to check that.
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