To Light Unit - Carrier 48N Series User's Information Manual

75-150 ton gas heating/electric cooling units with comfortlink controls
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WARNING
CARBON-MONOXIDE POISONING HAZARD
Failure to follow instructions could result in severe personal
injury or death due to carbon-monoxide poisoning, if
combustion products infiltrate into the building.
Check that all openings in the outside wall around the vent
(and air intake) pipe(s) are sealed to prevent infiltration of
combustion products into the building.
Check that furnace vent (and air intake) terminal(s) are not
obstructed in any way during all seasons.
AVERTISSEMENT
RISQUE D'INTOXICATION AU MONOXYDE DE
CARBONE
Si ces directives ne sont pas suivies, cela peut entraîner des
blessures graves ou une intoxication au monoxyde de car-
bone pouvant causer la mort, si des produits de combustion
s'infiltrent dans le bâtiment.
Vérifier que toutes les ouvertures pratiquées dans le mur
extérieur autour du ou des tuyaux d'évent (et de la prise
d'air) sont scellées de manière à empêcher l'infiltration de
produits de combustion dans le bâtiment.
Veiller à ce que la ou les sorties de l'évent de l'appareil de
chauffage (et la prise d'air) ne soient, en aucune façon, ob-
struées, quelle que soit la saison.
WARNING
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.
AVERTISSEMENT
En cas de température excessive, ou s´il est impossible de
couper l´alimentation en gaz, fermer le robinet manuel
d´alimentation en gaz du générateur d´air chaud avant de
couper l´alimentation électrique.

TO LIGHT UNIT

DANGER
1.
Do not turn off the electrical power to unit without first
turning off the gas supply.
2.
Before attempting to start the gas heating section,
familiarize yourself with all the procedures that must
be followed.
3.
Never attempt to manually light the burners on the unit
with a match, lighter, or any other flame. If the electric
sparking device fails to light the burners, refer to the
shutdown procedures, then call your dealer as soon as
possible.
If you do not follow these instructions exactly, a fire or ex-
plosion may result, causing property damage, injury, or loss
of life.
See Fig. 1 for location of gas valve(s). Refer to Fig. 2 while
proceeding with the following steps.
1.
Turn off the unit demand for cooling or heating by using
the Navigator™ device. The Navigator device is located in
the control box.
ESCAPE
a. Push the
shown.
b. Push the
key until the SERVICE TEST LED is
lit.
c. Push the
ENTER
d. Push the
STOP.
e. Push the
ENTER
will flash.
f. Push the
or
and then push
from heating, cooling or any operation. The controls
will still function and the display will still operate.
2.
Close the field-installed manual gas shutoff valve.
3.
Turn off the electrical power to the unit using the optional
disconnect or the field-installed disconnect and lock off
using proper lockout and tag-out procedures.
4.
Open the burner section hinged access door.
5.
Move the switch on the gas valves to the OFF position and
wait 5 minutes.
NOTE: If this is the first installation of the unit, the gas flue hoods
must be installed before operating unit. These must be installed for
the unit to run properly.
6.
Move the switch on the gas valves to the ON position.
7.
Close the burner section hinged access door.
8.
Turn on the electrical supply to the units.
9.
Open the field-installed manual gas valve.
10. Using the Navigator™ device, enable the unit to run using
the following procedure:
a. Push the
ESCAPE
shown.
b. Push the
key until the SERVICE TEST LED is
lit.
ENTER
c. Push the
d. Push the
STOP.
ENTER
e. Push the
will flash.
f. Push the
or
and then push
mal operation and exit SERVICE TEST mode.
11. To test the operation of the gas section, use the Navigator Ser-
vice Test routine to energize the gas outputs and to turn on the
gas. Refer to the unit Controls, Start-Up, Operation, Service
and Troubleshooting literature for more information.
12. For normal operation, make sure that units with a conven-
tional thermostat are set to heating control temperature.
On VAV (variable air volume) and CV (constant volume)
units with a space temperature sensor, make sure that the
set points are at the normal heat set points.
If the main burners fail to light or the blower fails to start,
shut down gas heating section and call your dealer for ser-
vice. Failure to follow these requirements could result in
serious personal injury.
2
key until "Select a Menu Item" is
key.
key to move the flashing cursor to
key again. The NO/YES display
key to toggle the display to YES
. The unit will be locked off
ENTER
key until "Select a Menu Item" is
key.
key to move the flashing cursor to
key again. The NO/YES display
key to toggle the display to NO
. The unit will return to nor-
ENTER
WARNING

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