Burners; Manual Reset Over-Temperature Control; Pressure Switch; Limit Control - Daikin Maverick I Installation And Maintenance Manual

Controls and Operation
To Start The Furnace
1
Set the thermostat to its lowest setting.
2
Turn off all electric power to the unit.
3
This unit does not have a pilot. It is equipped with an
ignition device which automatically lights the burner. Do
not try to light the burner by hand.
4
Remove control door.
5
Move control knob to the "OFF" position. Turn the knob
by hand only, do not use any kind of tool.
6
Wait five minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas, STOP!
Follow B in the safety information on the Operating
Instructions located on the back of the controls/access
panel. If you don't smell gas, go to the next step.
7
Move the gas control knob from "OFF" position to "ON"
position. Operate this unit with the gas control knob in
the "ON" position only. Do not use the gas control knob
as a means for throttling the burner input rate.
8
Replace the control door.
9
Turn on all electric power to the unit.
10
Set the thermostat to the desired setting.
11
If the unit will not operate, follow the instructions below
on how to shut down the furnace.
The initial start-up on a new installation may require the
control system to be energized for some time until air has bled
through the system and fuel gas is available at the burners.
To Shut Down Furnace
1
Set the thermostat to the lowest setting.
2
Turn off all electric power to the unit if service is to be
performed.
3
Remove control door.
4
Move control knob to the "OFF" position.
5
Replace control door.
42

Burners

Burners for these units have been designed so that field
adjustment is not required. Burners are tray-mounted and
accessible for easy cleaning when required.

Manual Reset Over-Temperature Control

Four manual reset overtemperature controls are located on the
burner shield. These devices senses blockage in the heat
exchanger or insufficient combustion air. This shuts off the
main burners if excessive temperatures occur in the burner
compartment.
Operation of this control indicates an abnormal condition.
Therefore, the unit should be examined by a qualified installer,
service agency, or the gas supplier before being placed back
into operation.
DO NOT JUMPER THIS DEVICE! Doing so can cause a fire
or explosion resulting in property damage, personal injury or
death. DO NOT reset the over-temperature control without
taking corrective action to assure that an adequate supply of
combustion air is maintained under all conditions of
operation. Failure to do so can result in carbon monoxide
poisoning or death. Replace this control only with the identical
replacement part.

Pressure Switch

This furnace has four pressure switches for sensing a blocked
exhaust or a failed induced draft blower. They are normally
open and close when the induced draft blower starts, indicating
air flow through the combustion chamber.

Limit Control

The supply air high temperature limit cut-off is set at the
factory and cannot be adjusted. It is calibrated to prevent the
air temperature leaving the furnace from exceeding the
maximum outlet air temperature.
DANGER
Daikin IM 972-1