6
Thermostat Wiring
Heating and Air Conditioning
with ECM variable speed motor
Thermostat Wiring
Heating and Air Conditioning/Heat pump
with ECM variable speed motor
Note: On units with 2 stage cooling or heat pump, terminal Y1
must be used. When Y1 on the electronic control receives a 24
VAC signal, the air flow is reduced by 20%. Do not use
terminal Y1 with a single stage cooling or heat pump.
2.5 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, p.14);
4. Check the electrode settings;
5. Make the electrical connections;
6. Complete oil line connections.
2.5.1 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.
2.5.2 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.
2.5.3 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. Refer to the
burner control instruction manual and markings for proper
adjustment of the post purge delay.
2.6 VENTING
WARNING
Poisonous carbon monoxide gas, fire and explosion
hazard.
Read and follow all instructions in this section.
Failure to properly vent this furnace can result in 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.
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.
445 01 4101 00
Summary of Contents for OMF112K14A
Page 17: ...17 Figure 5 Furnace dimensions 445 01 4101 00...
Page 18: ...18 Figure 6 Wiring Diagram 4 Speed Motor PSC 445 01 4101 00...
Page 19: ...19 Figure 7 Wiring Diagram Variable Speed Motor ECM 445 01 4101 00...
Page 20: ...20 PARTS LIST With 4 Speed motor PSC B50091B 445 01 4101 00...
Page 22: ...22 PARTS LIST With variable speed motor ECM B50092B 445 01 4101 00...
