Section 2 - Product Description; General System Description; Figure 1 - Qtc4 Air-Cooled Screw Liquid Chiller With Variable Speed Drive - Quantech QTC4 STYLE A Series Installation Operation & Maintenance

FORM QTC4-NM1
ISSUE DATE: 4/2/2018
Quantech QTC4 chillers are designed for water or
glycol cooling. All units are designed to be located
outside on the roof of a building or at ground level.
The units are completely assembled with all intercon-
necting refrigerant piping and internal wiring, ready
for field installation.
Prior to delivery, the unit is pressure tested, evacuated,
and fully charged with refrigerant and oil in each of the
two independent refrigerant circuits. After assembly,
an operational test is performed with water flowing
through the evaporator to ensure that each refrigerant
circuit operates correctly.
The unit structure is manufactured from heavy gauge,
galvanized steel. Many external structural parts are
coated with "Champagne" baked-on enamel powder
paint.
All exposed power wiring is routed through
liquid-tight, non-metallic conduit.

FIGURE 1 - QTC4 AIR-COOLED SCREW LIQUID CHILLER WITH VARIABLE SPEED DRIVE

QUANTECH

SECTION 2 - PRODUCT DESCRIPTION

GENERAL SYSTEM DESCRIPTION

The QTC4 chiller combines the best of modern screw
compressor design with the latest technology in
variable speed drives. The result is superior control and
efficiency in real world conditions. The VSD enables
slowing the speed of the compressor to match the load
on the system resulting in precise chilled liquid con-
trol, minimized sound, maximum energy efficiency,
and reduced cost of ownership. The VSD also pro-
vides soft starts with no electrical inrush. The lack of
heat build-up on start also enables required off time
between starts to be reduced to a period of two minutes.
The QTC4 Air-Cooled Screw Chiller utilizes many
components, which are the same or nearly the same as
a standard screw chiller of a similar size. This includes
modular frame rails, condenser, fans, compressors and
evaporator.
The chiller consists of two screw compressors in a
corresponding number of separate refrigerant circuits,
a hybrid falling film evaporator, an air-cooled condens-
er, receiver/flash tanks, feed valves, oil separators, and
compressor mufflers.
2
LD15045
15