Nortek C74BA Series User Manual

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.

Nortek C74BA Series Specifications

General

Voltage	208/230V
Refrigerant	R410A
Power Supply	60 Hz
Indoor Unit Dimensions (H x W x D)	Varies by model
Outdoor Unit Dimensions (H x W x D)	Varies by model
Indoor Unit Weight	Varies by model
Outdoor Unit Weight	Varies by model

Summary

Important Safety Information

Coil Installation

Upflow Installations

Step-by-step guide for installing coils in upflow configurations.

Horizontal Installations

Instructions for horizontal mounting, requiring specific drain pan kits.

Horizontal Left Installations

Specific steps for horizontal installation on the left side.

Horizontal Right Installations

Steps for horizontal installation on the right side of the unit.

Downflow Installations

Guidance for installing coils in downflow configurations.

Refrigerant Line Connections

System Depressurization

Procedure for safely releasing pressure from the coil's nitrogen charge.

Orifice Removal & Installation

Guidance on selecting, removing, and installing the correct orifice.

Connecting the Linesets - Cased Coil

Detailed steps for connecting refrigerant lines to cased indoor coils.

Connecting the Linesets – Uncased coil

Instructions for connecting refrigerant lines to uncased indoor coils.

Condensate Drain

Air Filter

Completing the Installation