Trane IntelliPak User Manual

General Information
RT-SVX36K-EN 17
High Pressure Controls (HPC)
High Pressure controls are located on the discharge lines
near the scroll compressors.They are designed to open
when the discharge pressure approaches 650 ± 10 psig.
The controls reset automatically when the discharge
pressure decreases to approximately 550 ± 10 psig.
However, the compressors on that circuit are locked out
and a manual reset diagnostic is initiated after the fourth
occurrence of a high pressure condition.
If the HPC opens after a compressor has started, all
compressors on that circuit will be turned off immediately
and will remain off for a minimum of 15 minutes. If the HPC
trips four consecutive times during the first 3 minutes of
operation, the compressors on that circuit will be locked
out and a manual reset diagnostic is initiated.
Variable speed compressor circuits use a different HPC
switch with 24 VDC contacts input to the inverter.
Otherwise, the variable speed HPC circuit is functionally
the same as described above.
High Compressor Pressure Differential
Protection
20-75T units provides High Compressor Pressure
Differential protection for the equipment , also referred to
as Low VI compressor protection.This protection is active
on a per circuit basis and prevents scroll involute stresses
from exceeding levels that could cause compressor
damage.
Two levels of control are implemented to support the High
Compressor Pressure Differential protection: Limit and
Diagnostic trips.
During a Limit trip, the controller will determine when the
pressure differential has exceeded predetermined limits
and will then take action by either limiting the compressor
capacity or by unloading/reducing the compressor
capacity on that circuit. Once the pressure differential
returns to an acceptable level, the circuit will become
unlimited if still needed for temperature control.
During a Diagnostic trip, the controller will determine
when the pressure differential has exceeded acceptable
levels for the equipment and will then de-energize the
circuit completely. Once the pressure differential returns
to an acceptable level, the circuit will be allowed to re-
energize if still needed for temperature control. If four
Diagnostic trips occur within the same request for
compressor operation, the circuit will be locked out on a
manual reset diagnostic.
If actively limiting or controlling compressor outputs
“OFF” due to a High Compressor Pressure Differential
event, the Limit/Diagnostic event will be found under
Status/ Compressor Status Submenu at the Human
Interface. During a diagnostic trip a diagnostic will be
indicated at the Human Interface.
Outdoor Air Humidity Sensor (3U63)
This is an analog input device used on applications with
100% economizer. It monitors the outdoor humidity levels
for economizer operation. It is mounted in the outside air
intake section and is connected to the RTM (1U48).
Return Air Humidity Sensor (3U64)
This is an analog input device used on applications with
the comparative enthalpy option. It monitors the return air
humidity level and compares it to the outdoor humidity
level to establish which conditions are best suited to
maintain the cooling requirements. It is mounted in the
return air section and is connected to the ECEM (1U52).
Space/Duct Humidity Sensor (5U108)
Analog input device used on applications with modulating
dehumidification option and/or humidification field
installed option. It is used to monitor the humidity level in
the space and for comparison with the dehumidification
and humidification setpoints to maintain space humidity
requirements. It is field mounted in the space and
connected to the RTM (1TB16).
Low Ambient Option 0° Fahrenheit (2U84,
2U85)
Air cooled units ordered with Low Ambient 0° Fahrenheit
will control the low ambient dampers (2U84, 2U85) to the
programmable Low Ambient Control Point based on
saturated condenser temperature during compressor
operation.
Status/Annunciator Output
This is an internal function within the RTM (1U48) module
that provides;
a. diagnostic and mode status signals to the remote
panel (LEDs) and to the Human Interface.
b. control of the binary Alarm output on the RTM.
c. control of the binary outputs on the GBAS module
to inform the customer of the operational status
and/or diagnostic conditions.
Low Ambient Compressor Lockout
Utilizes an analog input device. When the system is
configured for low ambient compressor lockout, the
compressors are not allowed to operate if the temperature
of the outside air falls below the lockout setpoint. When
the temperature rises 5°F above the lockout setpoint, the
compressors are allowed to operate.The setpoint for units
without the low ambient option is 50°F. For units with the
low ambient option, the setpoint is 0°F.The setpoints are
adjustable at the Human Interface inside the unit control
panel.
Space Pressure Transducer (3U62)
This is an analog input device that modulates the exhaust
damper or exhaust VFD to keep the space pressure within
the building to a customer designated control band. It is

Trane IntelliPak Specifications

General

Brand	Trane
Model	IntelliPak
Category	Air Conditioner
Language	English