Carrier 48N Series User's Information Manual
Carrier 48N Series User's Information Manual

Carrier 48N Series User's Information Manual

75-150 ton gas heating/electric cooling units with comfortlink controls

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NOTE TO INSTALLER:
This manual should be left with the equipment owner.
WARNING
If the information in this manual is not followed exactly, a
fire or explosion may result causing property damage, per-
sonal injury or loss of life.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use any
phone in your building.
Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
AVERTISSEMENT
RISQUE D´INCENDIE OU D´EXPLOSION
Si les consignes de sécurité ne sont pas suivies à la lettre,
cela peut entraîner la mort, de graves blessures ou des dom-
mages matériels.
Ne pas entreposer ni utiliser d´essence ni autres vapeurs ou
liquides inflammables à proximité de cet appareil ou de tout
autre appareil.
QUE FAIRE SI UNE ODEUR DE GAZ EST DÉTECTÉE
Ne mettre en marche aucun appareil.
Ne toucher aucun interrupteur électrique; ne pas
utiliser de téléphone dans le bâtiment.
Quitter le bâtiment immédiatement.
Appeler immédiatement le fournisseur de gaz en
utilisant le téléphone d´un voisin. Suivre les
instructions du fournisseur de gaz.
Si le fournisseur de gaz n´est pas accessible, appeler le
service d´incendie.
L´installation et l´entretien doivent être effectués par un in-
stallateur ou une entreprise d´entretien qualifié, ou le four-
nisseur de gaz.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480193-01
User's Information Manual
Printed in U.S.A.
Gas Heating/Electric Cooling Units
with ComfortLink Controls
Do not use this furnace if any part has been under water. A
flood-damaged furnace is extremely dangerous. Attempts
to use the furnace can result in fire or explosion. A quali-
fied service agency should be contacted to inspect the fur-
nace and to replace all gas controls, control system parts,
electrical parts that have been wet or the furnace if deemed
necessary.
Ne pas utiliser cet appareil de chauffage s´il a été en partie
immergé dans l´eau. Un appareil de chauffage endommagé
par une inondation est extrêmement dangereux. S´il est
utilisé, un incendie ou une explosion peut se produire. Il
faut avoir recours à une entreprise d´entretien qualifiée
pour faire inspecter l´appareil de chauffage et remplacer
toutes les commandes de gaz, les pièces du système de
contrôle, les pièces électriques qui sont entrées en contact
avec l´eau ou l´appareil de chauffage lui-même, si cela est
jugé nécessaire.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. Refer to
this manual. For assistance or additional information con-
sult a qualified installer, service agency, or the gas supplier.
Before performing recommended maintenance, be sure
main power switch to unit is turned off and lockout tag is
installed. Electrical shock could cause personal injury.
Your combination heating/cooling rooftop unit is equipped
with an automatic direct spark ignition system and induced-
draft power combustion blower.
Burners will light automatically. Do not attempt to light by
hand; personal injury may result.
Form 48N-2SO
Pg 1
48N 75-150 Ton
WARNING
AVERTISSEMENT
WARNING
WARNING
WARNING
7-19
Replaces: 48N-1SO

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Summary of Contents for Carrier 48N Series

  • Page 1 48N 75-150 Ton Gas Heating/Electric Cooling Units with ComfortLink Controls User’s Information Manual NOTE TO INSTALLER: WARNING This manual should be left with the equipment owner. Do not use this furnace if any part has been under water. A flood-damaged furnace is extremely dangerous. Attempts WARNING to use the furnace can result in fire or explosion.
  • Page 2: To Light Unit

    See Fig. 1 for location of gas valve(s). Refer to Fig. 2 while proceeding with the following steps. WARNING Turn off the unit demand for cooling or heating by using CARBON-MONOXIDE POISONING HAZARD the Navigator™ device. The Navigator device is located in Failure to follow instructions could result in severe personal the control box.
  • Page 3 GAS VALVE TYPICAL IN EACH SECTION GAS VALVE TYPICAL IN EACH SECTION 120-150 TON SIZES CONSISTS OF 75-105 TON SIZES CONSISTS OF 3, 4, OR 5 HEAT SECTIONS 2, 3, OR 4 HEAT SECTIONS Fig. 1 — Heat Section Details...
  • Page 4 MAIN STEP 2 STEP 1 STEP 3 STEP 5 STEP 4 STEP 6 STEP 7 STEP 8 STEP 9 STEP 10 Fig. 2 — To Light Unit...
  • Page 5: To Shut Unit Off

    Close the field-installed manual gas shutoff valve. TO SHUT UNIT OFF Turn off the electrical power to the unit using the optional disconnect or the field-installed disconnect and lock off WARNING using proper lockout and tag-out procedures. Open the burner section hinged access door. Do not turn off the electrical power to unit without first Move the switch on the gas valves to the OFF position and turning off the gas supply.
  • Page 6: Maintaining Your Unit

    MAINTAINING YOUR UNIT Air Filters Air filters should be checked at least every 3 or 4 weeks and All maintenance should be handled by skilled, experienced per- changed or cleaned whenever they become dirty. Table 1 sonnel. Your dealer can help you establish a standard procedure. indicates the correct filter size for your unit.
  • Page 7 CONTROL BOX GAS SECTION ACCESS DOOR ACCESS DOORS FILTER ACCESS DOOR (OPPOSITE SIDE) AIR HOODS ACCESS DOORS Fig. 4 — Door Locations Fan and Belts Combustion Area and Vent System Periodically check the condition of fan wheels and housings The combustion area and vent system should be visually in- and belt tension.
  • Page 8: Regular Dealer Maintenance

    Unit Serial Number ____________________________________ Unit Address _________________________________________ Bus Number _________________________________________ © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480193-01 Printed in U.S.A.

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