PLB-112
Oil Furnaces
–
Furnace Manual
4
11/13
1.2.
ELECTRICAL SYSTEM
The exterior of the unit must have an
uninterrupted ground to minimize the risk of
bodily harm, if ever an electrical problem
develops. A green ground screw is supplied
with the control box for that purpose.
The appliance must be installed in accordance with the current
ANSI/NFPA 70 National Electrical Code, CSA C22.1 Canadian
Electrical Code Part 1 and/or local codes.
The control system depends on the correct polarity of the power
supply. Connect “HOT” wire (H) and “NEUTRAL” wire (N) as
shown in Figures 9 and 10.
A separate line voltage supply should be used, with fused
disconnect switch or circuit breaker, between the main power
panel and the unit.
Only copper wire may be used for the 115V circuit on this unit. If
wires need to be changed, the replacements must have the same
temperature resistance as the originals.
1.3.
INSTALLATION OF THE
THERMOSTAT
A thermostat must be installed to control the temperature of the
area to be heated. Follow the instructions supplied with the
thermostat. Also refer to the wiring diagrams provided with the
heating/air conditioning unit. The connections must be made as
indicated on the following diagrams and the wiring diagrams,
figures 9 and 10.
Figure 2: Heating & Air Conditioning - With 4 Speed Motor
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
1.4.
INSTALLATION OF THE BURNER
Refer to the burner manufacturer’s instructions. Also, the burner
must be installed always in the same way independently of the
furnace orientation.
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 Table 11;
4.
Check the electrode settings;
5.
Make the electrical connections;
6.
Complete oil line connections.
1.4.1.
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 11 and specified pump pressure.
Always select nozzle sizes by working back from the desired flow
rate at operating pressure and not the nozzle marking.
1.4.2.
Air and Turbulator Settings
Before starting the burner for the first time, adjust the air and
turbulator settings to those listed in this manual, Table 11. Once
the burner becomes operational, final adjustments will be
required. Refer to section 2 of this manual
.
1.4.3.
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 a
burner equipped with this feature, the post purge delay must be
set to 15 seconds (For configuration use the Beckett Contractor’s
Tool "52082U"). No delay is required for Riello burners. Refer to
the burner control instruction manual and markings for proper
adjustment of the post purge delay.
