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14
Installation
the values given by the pressure
gauges, open one valve and close
the other.
Refrigerant Safety Valves
Discharge valves are an option for
the RTUB. If installation requires this
valve to be mounted, it is mandatory
to install two safety valves: one
between the compressor and the
service valve and the other after the
service valve to protect the
condenser.
ƽƽ CCAAUUTTIIOONN
The safety valve calibration must not
exceed 25 bars. The liquid line must
be connected at the inlet to the drier
filter which is supplied with a bend
blocked by a brazed plug. The
connection piping must be correctly
dimensioned and installed, because
these factors have a substantial
impact on the system's performance
and reliability.
Water Pressure-Relief
Valves
ƽƽ CCAAUUTTIIOONN
To prevent shell damage, install
pressure-relief valves in the
evaporator water system. Install a
water pressure-relief valve in the
evaporator inlet piping, between the
evaporator and the inlet shutoff
valve. Water vessels with close-
coupled shutoff valves have a high
potential for hydrostatic pressure
buildup on a water temperature
increase. Refer to applicable codes
for relief-valve installation
guidelines.
Installing and connecting
temperature sensors
General Recommendations
Regardless of the type of monitoring
sensor required by a particular
application, the sensor must always
be positioned far enough from the
evaporator or condenser to enable
the sensor to read a correct
temperature for the mixed water.
Install the sensor at 4 o'clock on the
water piping to prevent any
condensation. When installing
standard or optional temperature
sensors described in the following
paragraphs, comply with the
instructions:
Put thermocontact paste in each
sensor bulbwell before inserting the
sensor. All the temperature sensors
installed on site have an
identification number and a serial
number marked on the part body.
Also note that both sensors in each
pair have the same serial number.
ƽƽ WWAARRNNIINNGG
To prevent degraded operation due
to electrical interference, run the
sensor cables in a duct. However, do
not lay sensor cables with other
cables whose voltage is greater than
30 VAC.
Extension of sensor power cable
A temperature sensor's power cable
may not be long enough to reach the
UCM. If this is the case for your
installation, connect the cable to a
junction box installed in a more
Figure 8- RTUB Evaporator water pressure drops
Evaporator Water Pressure Drop
Water Flow Rate l/s
kPa
RLC-SVX03A-E4