Quantech QCC2015CEE, Installation, Operation And Maintenance Manual, Page: 17 / 172

QUANTECH
17
SECTION 2 – PRODUCT DESCRIPTION
Form QCC2-NM1
Issue Date: 5/20/2021
2
Suction Pressure Transducers
This transducer permits the unit to sense and display
suction pressure. This capability is standard on QCC2
models.
Multi-Unit Sequencing
A separate sequencing control center is provided to
handle sequencing control of up to eight chillers in
parallel based on mixed liquid temperature (intercon-
necting wiring by others). The only one of following
factory mounted options can be offered on a unit at a
time: BAS, Remote Control Panel or Multi-Unit Se-
quence Control.
Compressor and piping options
Chicago Code Relief Valves
Unit will be provided with relief valves to meet Chi-
cago code requirements. (Factory-Mounted)
Service Isolation Valve
Service isolation valves are standard to unit. This in-
cludes a system high pressure relief valve or inter-
nal compressor relief mechanism in compliance with
ASHRAE 15. (Factory-Mounted)
Hot Gas Bypass
Permits continuous, stable operation at capacities be-
low the minimum step of compressor unloading to as
low as 5% capacity (depending on both the unit and
operating conditions) by introducing an artificial load
on the cooler. Hot gas by-pass is installed on only re-
frigerant system #1 on two-circuited units. (Factory-
Mounted)
Condenser and Cabinet Options
Condenser coil protection against corrosive environ-
ments is available by choosing any of the following
options. For additional application recommendations,
refer to Form 150.12-ES1. (Factory-Mounted)
Pre-Coated Fin Condenser Coils
The unit’s coils are constructed with epoxy coated
aluminum fins. This can provide corrosion resistance
comparable to copper-fin coils in typical seashore loca-
tions. Either these or the post-coated coils (below) are
recommended for units being installed at the seashore
or where salt spray may hit the unit.
Post-Coated Dipped Condenser Coils
The unit’s coils are constructed with dipped-cured con-
denser coils. This is the choice for corrosive applica-
tions (with the exception of strong alkalis, oxidizers
and wet bromine, chlorine and fluorine in concentra-
tions greater than 100 ppm).
Copper Fin Condenser Coils
The unit’s coils are constructed with copper fins. This
is not recommended for units in areas where they may
be exposed to acid rain.
Enclosure Panels (Unit)
Tamperproof enclosure panels prevent unauthorized
access to units. Enclosure panels can provide an aes-
thetically pleasing alternative to expensive fencing.
Additionally, for correct head pressure control, Quan-
tech recommends the use of louvered panels.
Louvered Panels (Full Unit)
Louvered panels surround the front, back, and sides of
the unit. They prevent unauthorized access and visu-
ally screen unit components. Unrestricted air flow is
permitted through generously sized louvered openings.
This option is applicable for any outdoor design ambi-
ent temperature up to 115°F (46°C). (Factory-Mount-
ed.)
Sound Attenuation
One or both of the following factory mounted sound
attenuation options are recommended for residential or
other similar sound-sensitive locations. Louvered Pan-
els can be ordered for winter applications where wind
gusts may exceed five miles per hour. The following
types of enclosure options are available:
Compressor Acoustic Sound Blanket
Each factory mounted compressor is individually en-
closed by an acoustic sound blanket. The sound blan-
kets are made with one layer of acoustical absorbent
textile fiber of 5/8 in. (15 mm) thickness; one layer
of anti-vibrating heavy material thickness of 1/8 in.
(3 mm). Both are closed by two sheets of welded PVC,
reinforced for temperature and UV resistance.