Abnormal Conditions - Trane UC SERIES Installer's Manual

Installer's Guide
INSTRUCTIONS TO THE OWNERS
In the event that electrical, fuel, or mechanical failures
occur, the owner should immediately turn the gas
supply off at the manual gas valve, located in the
burner compartment. Also turn off electrical power to
the furnace and contact the service agency designated
by your dealer.
BURNER BOX TEMPERATURE LIMIT DEVICE
All models are equipped with a manual reset temperature limit
located on the burner box. In case of excessive temperature, the
limit will open and cause the circuit to open which shuts off all
flow of gas.

ABNORMAL CONDITIONS

1. EXCESSIVE COMBUSTION PRESSURE (WIND IN
EXCESS OF 40 M.P.H.) VENT OR FLUE BLOCKAGE
If pressure against induced draft blower outlet becomes
excessive, the pressure switch will open and shut off the gas
valve until acceptable combustion pressure is again available.
2. LOSS OF FLAME
If loss of flame occurs during a heating cycle, or flame is not
present at the sensor, the flame control module will close
the gas valve. The flame control module will then recycle
the ignition sequence, then if ignition is not achieved, it will
shut off the gas valve and lock out the system.
3. POWER FAILURE
If there is a power failure during a heating cycle, the system
will restart the ignition sequence automatically when power
is restored, if the thermostat still calls for heat.
4. GAS SUPPLY FAILURE
If loss of flame occurs during a heating cycle, the system
integrated control module will recycle the ignition sequence,
than if ignition is not achieved, the integrated control
module will shut off the gas valve and lock out the system.
5. INDUCED DRAFT BLOWER FAILURE
If pressure is not sensed by the pressure switch, the
contacts will remain open and not allow the gas valve to
open, therefore the unit will not start. If failure occurs
during a running cycle, the pressure switch contacts will
open and the gas valve will close to shut the unit down.
6. CONDENSATE DRAIN BLOCKAGE
If the condensate drain is blocked, either by debris, im-
proper draining, or by freezing condensate, the pressure
switch will sense the accumulation of condensate in the
furnace drain pan. The pressure switch contacts will open
and remain open, not allowing unit operation. The unit will
American Standard Inc.
6200 Troup Highway
Tyler, TX 75707
For more information contact
your local dealer (distributor)
7. RESET AFTER LOCKOUT
8. RESET AFTER BURNER BOX LIMIT SHUTDOWN
The following warning complies with State of California law, Proposition 65.
This product contains fiberglass wool insulation!
Fiberglass dust and ceramic fibers are believed by the
State of California to cause cancer through inhalation.
Glasswool fibers may also cause respiratory, skin, or
eye irritation.
PRECAUTIONARY MEASURES
●
Avoid breathing fiberglass dust.
●
Use a NIOSH approved dust/mist respirator.
● Avoid contact with the skin or eyes. Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.
●
Wash clothes separately from other clothing: rinse
washer thoroughly.
●
Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respirator in these situations.
FIRST AID MEASURES
Eye Contact – Flush eyes with water to remove dust.
Skin Contact – Wash affected areas gently with soap
Since the manufacturer has a policy of continuous product and product data improvement, it reserves the right
to change design and specifications without notice.
not operate until the condensate drain has been cleared, and
the condensate flows freely.
When the integrated control module has shut the system
down and gone into lockout, the system must be manually
reset before the unit will restart. To reset, turn the system
power off, then on, then off and then on again within
30 seconds. This may be done at the unit's power source or
at the thermostat. The system will not reset unless the
procedure off-on-off-on is completed within 30 seconds.
If the furnace shuts down, one thing that can be checked is
the burner box temperature limit switch. It is located on
the bottom of the burner box. The vent and combustion air
inlet terminations should be checked for blockage. If
blockage exists, clear the problem and then the reset button
may be depressed. If there is no blockage of the
terminations, the limit switch must be reset by a
qualified servicer.
▲
WARNING
!
If symptoms persist, seek medical
attention.
and warm water after handling.
P.I. 11/02