Section 2 - Product description
Quantech
19
Form QTC4-NM2
Issue date: 05/12/2023
2
Figure 3 -
View of Quantech control center user
interface
Quantech systems or another vendor’s systems can in-
corporate these setpoints and data outputs to give the
customer a complete understanding of how the system
is running through a Building Automation System.
Extreme Conditions –
During extreme or unusual
conditions (that is, blocked condenser coils, ambient
above scheduled maximum, and so on) the chiller con-
trol system avoids shutdown by varying capacity. By
monitoring motor current and suction and discharge
pressures, the chiller can maintain maximum available
cooling output without shutting down.
Unit Safeties are provided for the chiller to perform
auto-reset shut down for the following conditions:
• Ambient temperature above or below allowable
range
• Out of range leaving chilled liquid temperature
• Under voltage
• Flow switch operation
Accessories and options
All options factory mounted unless otherwise noted.
Sound attenuation
Low Noise Kits
– The standard chiller configuration is
equipped with low sound fans and acoustic treatments
on the refrig erant lines and compressors. There are
several sound attenuation options available to further
reduce sound at its source thereby meeting local sound
level regulations.
SilentNight™
– Due to time of day based sound regu-
lations in some locations it may be desirable to force
the chiller to a lower sound level on demand. The Si-
lentNight™ control option provides a control input to
limit sound output of the chiller based on time of day.
This feature is programmable at the chiller panel or can
be controlled remotely using a signal (4 mA to 20 mA
or 0 VDC to 10 VDC) from a BAS system.
Fan options
Low Sound Fans
– The chiller is equipped with spe-
cially designed fans and motors to provide lower sound
levels yet retain appropriate airflow. The result is re-
duced fan generated sound with minimal effect on the
chiller capacity or efficiency. Low sound fans are also
available with variable speed control.
High Airflow EC Fans
– The chiller is also equipped with
the option of condenser fan assembly utilizing variable
speed electronically commutated (EC) motors to provide
extra airflow across coils with lower power consump-
tion, resulting in higher efficiencies. In some chiller con-
figurations, this option can provide an increase in chiller
capacity at high ambient. Contact your local Quantech
representative for more information.
Condenser coils
QTC4 offers next-gen 4G microchannel coils which
allow for bigger flow channels, reducing refrigerant
pressure drop by three to four times and improved con-
denser performance. The design working pressure of
the coils is 375 psig (25.8 barg).
Condenser coil protection
The aluminum alloys used in the QTC4 micro-chan-
nel condenser have been carefully selected and tested
for high corrosion resistance. However, all metals can
corrode in harsh conditions. Consider protecting coils
from corrosive environments such as coastal, marine,
urban and industrial.
Summary of Contents for QTC40160
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