Installation and Maintenance Manual

Installation - Mechanical
58 RLC-SVX09H-EN
Note: Vent line length must not exceed code
recommendations. If the line length will exceed
code recommendations for the outlet size of the
valve, install a vent line of the next larger pipe size.
Low side relief valve discharge setpoints are 200 psig.
Once the relief valve has opened, it will reclose when
pressure is reduced to a safe level.
Pipe each relief valve on the unit into a common vent line.
Provide an access valve located at the low point of the vent
piping, to enable draining of any condensate that may
accumulate in the piping.
Summary or Relief Valves - RTWD, RTUD
RTUD Installation
The installation of a split system offers a good economic
alternative to satisfy the chilled water demand for cooling
a building, particularly in the case of new construction.
The choice of a completeTrane system, including the
compressor chiller and the condenser offers the designer,
installer and owner the advantages of an optimized
selection and undivided responsibility for the design, the
quality and the operation of the complete system.
Application examples
No Elevation Difference
See Figure 35, p. 59.
Restrictions
• Total distance between components should not
exceed 200 ft (actual) or 300 ft (equivalent).
• Elevation rise of the liquid line must not be more than
15 ft above the base of the air-cooled condenser.
• Discharge line trap is recommended leaving the oil
separator if the discharge piping runs for more than 10
(actual) feet horizontally above the RTUD unit.
Condenser Installed Above Compressor Chiller
See Figure 36, p. 59.
Restrictions
• Total distance between components should not
exceed 200 ft (actual) or 300 ft (equivalent).
• Elevation difference greater than 100 ft (actual) will
result in at least a 2% efficiency decrease.
Condenser Installed Below Compressor Chiller
See Figure 37, p. 60.
Restrictions
• Total distance between components should not
exceed 200 ft (actual) or 300 ft (equivalent).
• Elevation rise of the liquid line must not be more than
15 ft above the base of the air-cooled condenser.
Figure 34. Evaporator relief valves
Table 37. Relief valve descriptions
Condenser Evaporator Oil Separator
Units
RTWD
High Pressure
Side
RTWD, RTUD
Low Pressure Side
RTUD
High Pressure
Side
Relief Setpoint 300 psig 200 psig 350 psig
Quantity
(standard)
1 per ckt 1 per ckt 1 per ckt
Quantity
(Dual Relief
Valves option -
RTWD only)
2 per ckt
RTWD - 2 per ckt
(n/a - RTUD units)
n/a
Relief Rate
(lb/min)
25.4 28.9 13.3
Field
Connection Size
5/8” MFL 3/4” NPTFI 3/8” MFL
%VAPORATOR
2ELEIF6ALVES
Evaporator Relief Valves