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

Operating Instructions

Never test for gas leaks with an open flame. It can cause an explosion or fire
resulting in property damage, personal injury or death. Use a commercially
available soap solution made specifically for the detection of leaks to check
all connections as specified in the Mechanical Installation section of these
instructions.
The spark ignitor and ignition lead from the ignition control are high voltage.
Keep hands or tools away to prevent electrical shock. Shut off electrical
power before servicing any of the controls. Failure to adhere to this warning
can result in personal injury or death.
Should overheating occur or the gas supply fail to shut off, shut off the
manual gas valve to the unit before shutting off the electrical supply. Failure
to do so can result in an explosion or fire causing property damage, severe
personal injury or death!
This unit is equipped with integrated furnace control. This
device lights the main burners each time the room thermostat
(closes) calls for heat. See operating instructions on the back
of the furnace/controls access panel.
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.
IM 972-2 • MAVERICK I ROOFTOP SYSTEMS
DANGER
DANGER
DANGER
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.

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

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.
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.

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.
40
Controls and Operation
DANGER
www.DaikinApplied.com