Turning Off Gas To Unit; Heating System Maintenance - Trane Precedent YSJ072 Installation, Operation And Maintenance Manual

NOTICE
Coil Freeze-Up!
Failure to follow instruction below could result in
equipment damage.
Drain and vent coils when not in use. Trane
recommends glycol protection in all possible freezing
applications. Use a glycol approved for use with
commercial cooling and heating systems and copper
tube coils.

Turning Off Gas to Unit

1. Set the thermostat to lowest setting.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious
injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by
Trane or others, refer to the appropriate
manufacturer's literature for allowable waiting periods
for discharge of capacitors. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
2. Turn off all electric power to the unit if service will be
performed.
3. Remove the access panel that contains the label
shown in Figure 78, p.
4. Change the ON/OFF switch to the OFF.
5. Replace panel removed in
RT-SVX071D-EN
70.
Step 3.
Gas Heat Operation and Maintenance

Heating System Maintenance

WARNING
Hazard of Explosion or Fire!
Failure to follow instructions could result in death or
serious injury and equipment or property damage.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
IF YOU SMELL GAS, follow instructions below:
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Do not use any phone in your building.
• Open windows and doors.
• Alert others and evacuate building immediately.
• From a phone outside of the building,
immediately call your gas supplier. Follow the
gas supplier's instructions. If you cannot reach
your gas supplier, call the fire department.
Complete the following unit inspections and service
routines at the beginning of each heating season.
Important: These steps should only be performed by a
qualified service technician.
1. Inspect the control panel wiring and heating controls to
confirm connections are tight and wiring insulation is
intact.
2. Turn the unit on and off at the thermostat to be sure the
ignition control and spark electrode are operating
properly.
3. Turn off the gas supply with the unit operating to verify
that the gas valves closes and that a re-ignition cycle is
initiated by the ignition control.
4. Check the operation of the gas ignition system
5. Check the burner manifold pressure. A 1/8 inch pipe
plug is provided in the gas valve for this purpose.
6. Visually inspect all of the unit's flue product passage
ways for excessive deposit build up and corrosion. If
build up or corrosion is apparent, perform the
necessary repairs.
7. Arrange for a qualified serviceman to inspect the unit
every other heating season to maintain safe and
efficient operation.
8. Visually check the main burner flames. They should be
bright blue flames extending into the heat exchanger
sections.
9. Never store anything flammable or combustible around
or near the unit.
71