CNPHP4221ALA
C = Coil Product
N = N Coil Type
P = Puron® Refrigerant TXV Refrigerant Type
H = Horizontal Coil Configuration
P = Painted Cabinet Finish
42 = 3.5 Ton Unit Capacity
21 = 21" in (533 mm) Cabinet Width
A = 1st Revision Level
L = Aluminum Tubing Design
A = Basic Variations

This horizontal design N-coil is an evaporator coil designed to provide the highest standards of reliability and durability. The coils are available for use in Puron®, the environmentally friendly refrigerant, and R-22 systems. Both designs have a painted case (taupe metallic) and come with factory-installed thermostatic expansion valves (TXV). The coils are offered in different cabinet configurations for use in multiple installation applications. Easy maintenance is provided as the coil slides out of the cabinet after removing the access door and service panel. The coils are available in sizes 024 through 061 (2 to 5 tons).
Tin Plated Copper Coils – “T” models are built with special hairpins, tin plated to resist both general pitting corrosion and excessive indoor Formicary Corrosion. (Formicary Corrosion is an industry phenomenon.)
Aluminum Coils – “L” models are built with aluminum hairpins, designed to resist both general pitting corrosion and excessive indoor-Formicary Corrosion. (Formicary Corrosion is an industry phenomenon.)

DESIGN FEATURES
Water Management — These coil designs do an excellent job of water management. The coils are designed to avoid water blow-off into the ducts by directing condensate away from the fins and into the drain pan. The coil drain pan design provides improved condensate removal into the drain. This improves indoor air quality.
Durable Condensate Pan — Each coil is equipped with a corrosion-resistant condensate drain pan. The condensate drain pan is designed with a slope to help ensure proper drainage, improved moisture removal, and home comfort.
Compact Design — The unique design is great for all those horizontal applications. They are designed for either horizontal-right or horizontal-left furnace fit up. The coil is ideally suited for either attic or crawl space installation.
Brass Inserts — Every condensate pan features two 3/4-in. female threaded brass insert connections. The unique brass inserts provide for a leak-free condensate line connection to prevent water damage.
Refrigerant Connections — The coils are provided with proven sweat connections for leak-free operation maintaining system reliability.
Burst Pressures — These coils meet or exceed burst pressure of 2100 psi which is at least three to five times the pressure they will see in actual application.
Thermostatic Expansion Valves (TXV) — All the Carrier coils have refrigerant-specific factory-installed TXVs.
Teflon Ring — The ring, installed inside the liquid line connection at the TXV is the best option for preventing refrigerant leaks and future service calls. Teflon works with both Puronr and R-22 refrigerants.