Dettson OLR154F20A, Installation Instructions And Homeowner'S Manual

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Figure 3: Thermostat Wiring- Heating & Air Conditioning -
With ECM Variable Speed Motor
Figure 4: Thermostat Wiring-Heating &Air
Conditioning/HeatPump - With ECM Variable Speed Motor
2.4 INSTALLATION OF THE BURNER
Also refer to the burner manufacturer’s instructions.
1. Position the mounting gasket between the mounting
flange and the burner mounting plate. Align the holes in
the burner mounting plate with the studs on the mounting
flange and bolt securely in place.
2. Remove the burner drawer assembly or the air tube
assembly;
3. Install the nozzle (refer to Technical Specifications, p.13);
4. Check the electrode settings;
5. Make the electrical connections;
6. Complete oil line connections.
2.4.1 Nozzles
The burner comes equipped with an appropriate nozzle.
However, if another size or a replacement nozzle is required,
use the manufacturer’s recommended spray angle and type a
shown in Table 1 and based on a pump pressure of 100 psi.
Always select nozzle sizes by working back from the desired
flow rate at operating pressure and not the nozzle marking.
2.4.2 Air and Turbulator Settings
Before starting the burner for the first time, adjust the air
and turbulator settings to those listed in this manual.
Once the burner becomes operational, final adjustments
will be required. Refer to section 3 of this manual.
2.4.3 Post purge delay adjustment
The post purge delay on the oil-fired burners is factory set
to zero second. This delay is applicable for all
installations with chimney venting. For heating units
installed with side wall venting and burners equipped with
this feature, the post purge delay must be set to 15
seconds. No delay is required for Riello burners. Refer to
the burner control instruction manual and markings for
proper adjustment of the post purge delay.
2.5 VENTING
WARNING
Poisonous carbon monoxide gas hazard.
Never install a hand operated damper in the vent
pipe. However, any Underwriters Laboratories listed,
electrically operated automatic type vent damper may
be installed if desired. Be sure to follow the
instructions provided with vent damper. Also, read
and follow all instructions in this section of the
manual.
Failure to properly vent this furnace or other
appliances can result in death, bodily injury and/or
property damage.
To ensure the safe and proper functioning of an oil
furnace, it must always be connected to a flue with
sufficient draft or to an approved side-wall venting
system. In addition, it is strongly recommended to
perform a complete inspection of all the existing venting
systems.
2.5.1 Masonry chimney
This furnace can be vented into an existing masonry
chimney. However, the unit must not be vented into a
chimney into which a solid fuel burning furnace is already
being vented.
Before venting this furnace into a chimney, its condition
must be checked and repairs made, if necessary. Also,
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
This unit may be installed with or without a draft regulator.
However, 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.