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C74BA & C74BH Series Split System Indoor Cased/Uncased Coils With Orifice

INSTALLATION INSTRUCTIONS

IMPORTANT

ATTENTION INSTALLERS:

It is your responsibility to know this product better than your customer. This includes being able to install the 

product according to strict safety guidelines and instructing the customer on how to operate and maintain the 

equipment for the life of the product. Safety should always be the deciding factor when installing this product 

and using common sense plays an important role as well. Pay attention to all safety warnings and any other 

special notes highlighted in the manual. Improper installation of the furnace or failure to follow safety warnings 

could result in serious injury, death, or property damage.
These instructions are primarily intended to assist qualified individuals experienced in the proper installation 

of this appliance. Some local codes require licensed installation/service personnel for this type of equipment. 

Please read all instructions carefully before starting the installation. Return these instructions to the customer’s 

package for future reference.

DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

Summary of Contents for C74BA Series

Page 1: ...plays an important role as well Pay attention to all safety warnings and any other special notes highlighted in the manual Improper installation of the furnace or failure to follow safety warnings cou...

Page 2: ...unit Unqualified individuals should not attempt to interpret these instructions or install this equipment If you do not posses mechanical skills ortools callyourlocaldealerforassistance Under no circ...

Page 3: ...Table 1 TXV Kit Part Numbers COIL INSTALLATION WARNING ELECTRICAL SHOCK FIRE OR EXPLOSION HAZARD Failuretofollowsafetywarningsexactlycouldresult in serious injury or property damage Improper servicin...

Page 4: ...kage 11 Reinstall the coil access door 12 Restore electrical power to the furnace Downflow Installations C74 coils may be installed in downflow applications It is required that the furnace and coil ca...

Page 5: ...tance to braze joint 7 Connect the suction and liquid lineset tubes 8 Braze the individual connections with dry nitrogen flowing through the joints CAUTION Itisrecommendedthatawetragbewrappedaround th...

Page 6: ...ute the lines to a suitable drain avoiding sharp bends and pinching of the lines The drain should maintain a minimum horizontal slope in the direction of discharge of no less than 1 vertical for every...

Page 7: ...7 W 2 1 2 HS HL 3 1 8 19 1 2 H Figure 5 C74 Uncased Coil Dimensions Without TXV Figure 6 C74 Cased Coil Dimensions...

Page 8: ...7 5 17 5 17 5 17 5 23 5 23 5 23 5 27 27 27 HS HEIGHT OF SUCTION LINE IN 15 5 15 5 15 5 15 5 21 5 21 5 21 5 25 25 25 CONNECTION LIQUID LINE 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 CONNECTION SUCTION LI...

Page 9: ......

Page 10: ...ter attention tous les avertissements de s curit et toute autre remarque sp ciale donn e dans le manuel L installation inappropri e de la fournaise ou le non respect des avertissements de s curit ris...

Page 11: ...r de l assistance Le propri taire ne doit en aucun cas tenter d installer ou de r parer cet appareil Le non respect des recommandations de s curit peut causer des dommages l quipement ou des blessures...

Page 12: ...eau 1 pour d terminer une trousse appropri e la capacit et au type de frigorig ne de l appareil V rifiez la taille des orifices des serpentins et confirmez qu elle convient l application avec l appare...

Page 13: ...e marquez clairement l emplacement de la fuite et retournez le serpentin au distributeur pour traitement Si aucune fuite n est d tect e le serpentin peut tre install 3 Enfoncez la vanne pour vacuer to...

Page 14: ...ations de l appareil ext rieur Assurez vous que les bouts sont ronds propres et sans bavures 2 Branchez les tubes des conduites d aspiration et de liquide 3 Brasezlesbranchementsindividuelsenfaisantci...

Page 15: ...les codes locaux pour des restrictions et pr cautions suppl mentaires Acheminez les conduites vers un drain appropri en vitant les courbes trop abruptes et les pincements dans les conduites Le drain d...

Page 16: ...7 W 2 1 2 HS HL 3 1 8 19 1 2 H Figure 5 Dimensions du serpentin non coffr C74 sans d tendeur thermostatique Figure 6 Dimensions du serpentin coffr C74 VUE DE DESSUS VUE D AVANT...

Page 17: ...6 000 24 000 36 000 48 000 42 000 48 000 Capacit nominale BTUH max 30 000 30 000 42 000 30 000 42 000 Taille d orifice install po 0 046 0 053 0 046 0 053 0 068 0 053 0 068 0 077 0 068 0 077 W Largeur...

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Page 20: ...avis ou sans aucune obligation 06 22 O Fallon MO Nortek Global HVAC LLC 2022 Tous droits r serv s Specifications illustrations subject to change without notice or incurring obligations 06 22 O Fallon...

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