Section 2: Product Description; Introduction; General System Description; Figure 1 - Compressors - Johnson Controls Quantech Millennium QCC3080CZE Installation Operation & Maintenance

FORM QCC3-NM1
ISSUE DATE: 12/19/2023

Introduction

Quantech Millennium Air-Cooled Scroll Condens-
®
ing Units can be used for all air conditioning appli-
cations using central station air handling or terminal
units. They are completely self-contained and are de-
signed for outdoor (roof or ground level) installation.
Each unit includes hermetic scroll compressors, a liq-
uid cooler, air cooled condenser, and a weather resis-
tant microprocessor control center, all mounted on a
pressed steel base.
The 78 ton to 160 ton (273 kW to 560 kW) QCC3 Con-
densing Unit Models are shipped complete from the
factory ready for field installation.
The unit is pressure-tested, evacuated and given a ni-
trogen holding charge and includes an initial oil charge
(R-410A or R-454B refrigerant supplied by others).
After assembly, a operational test is performed to en-
sure that each control device operates correctly.
The unit structure is heavy-gauge, galvanized steel.
This galvanized steel is coated with baked-on powder
paint, which, when subjected to ASTM B117 1000
hour, salt spray testing, yields a minimum ASTM 1654
rating of 6. Units are designed in accordance with
NFPA 70 (National Elec tric Code), ASHRAE/ANSI 15
Safety code for mechanical refrigeration, and are cETL
listed. All units are produced at an ISO 9000-registered
facility.
All exposed power wiring is routed through liquid-
tight, non-metallic conduit.

General system description

Compressors
The condensing unit has suction-gas cooled, hermetic,
scroll compressors. The QCC3 compressors incorpo-
rate a compliant scroll design in both the axial and
radial direction. All rotating parts are statically and
dynamically balanced. A large internal volume and oil
reservoir provides greater liquid tolerance. Compres-
sor crankcase heaters are also included for extra pro-
tection against liquid migration.
Quantech

Section 2: Product description

FIGURE 1 - COMPRESSORS

Condenser
Coils: Fin and tube condenser coils of seamless, in-
ternally-enhanced, high-condensing-coefficient, corro-
sion resistant copper tubes are arranged in staggered
rows, mechanically expanded into aluminum fins. Inte-
gral subcooling is included. The design working pres-
sure of the coil is 650 psig (45 bar).
Fans: The condenser fans are composed of corro sion-
resistant aluminum hub and glass-fiber-reinforced
polypropylene composite blades molded into a low
noise airfoil section. They are designed for maximum
efficiency and are statically and dynamically balanced
for vibration free operation. They are directly driven by
independent motors, and positioned for vertical air dis-
charge. The fan guards are constructed of heavy-gauge,
rust-resistant, coated steel. All blades are statically and
dynamically balanced for vibration-free operation.
Motors: The fan motors are Totally Enclosed Air-Over,
squirrel-cage type, current protected. They feature ball
bearings that are double-sealed and permanently lubri-
cated.
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