RLC-SVX14H-GB
32
System Con
fi
guration
The system can be confi gured in any of the primary
arrangements as shown in Figure 8 and 9. The
confi guration and its associated elevation, along with
the total distance between the RTUD and the air-cooled
condenser, plays a critical role in determining the liquid
line and discharge line sizes. This will also affect the
fi eld refrigerant and oil charges. Consequently, there are
physical limits which must not be violated if the system
is to operate as designed. Please note the following
restrictions:
1.
The discharge line sizing is different for different
leaving evaporator water temperatures.
2.
The total distance between the RTUD and the air-
cooled condenser must not exceed 61 m actual or
91 m equivalent.
3.
Liquid line risers must not exceed 4.5 m from the
base of the air-cooled condenser.
4.
Discharge line risers cannot exceed an elevation
difference greater than 30 m (actual) without a
minimum of 2% effi ciency decrease.
5.
Refer to Figure 9 for location of recommended traps.
6.
Circuit #1 on the condenser must be connected to
Circuit # 1 on the RTUD unit.
CAUTION
Equipment Damage!
If circuits are crossed, serious equipment damage may
occur.
Equivalent Line Length
To determine the appropriate size for fi eld installed
liquid and discharge lines, it is fi rst necessary to
establish the equivalent length of pipe for each line,
including the added fl ow resistance of elbows, valves,
etc. An initial approximation can be made by assuming
that the equivalent length of pipe is 1.5 times the actual
pipe length.
NOTE: Table 10 states the equivalent length, for various
non-ferrous valves and fi ttings. When calculating the
equivalent length, do not include piping of the unit. Only
fi eld piping must be considered.
CAUTION! RTUD is only a component of a complete
installation. It includes its own high pressure protection
set at 23 bar. The party in charge of the supply of the
condenser and of its refrigerant piping is responsible for
implementing all required protections to comply with PED
requirements for the design pressure of the condenser
installed. Refer to the document PROD-SVX01_-XX
delivered with this chiller to check all the mandatory
conformity requirements of the Pressure Equipment and
Machinery directives for this installation.
Split system installation
Line Size
Inches OD
Globe
Valve (m)
Angle
Valve (m)
Short
Radius Elbow (m)
Long
Radius Elbow (m)
1 1/8
27
8.8
0.8
0.6
1 3/8
31
10.1
1.0
0.7
1 5/8
35
10.4
1.2
0.8
2 1/8
43
11.9
1.6
1.0
2 5/8
48
13.4
2.0
1.3
3 1/8
56
16.2
2.4
1.6
3 5/8
66
20.1
3.1
1.9
4 1/8
76
23.2
3.7
2.2
Table 10 - Equivalent Lengths of Non-Ferrous Valves and Fittings
