JOHNSON CONTROLS
54
FORM 201.30-ICOM1 (519)
ISSUE DATE: 05/22/2019
SECTION 3 - HANDLING, STORAGE, INSTALLATION AND REASSEMBLY
TABLE 18 - EVAPORATOR AND CONDENSER WA-
TER CAPACITY (GAL/L)
SHELL
CODE
EVAPORATOR
(PIN 5,6) GAL (L)
CONDENSER
(PIN 7,8) GAL (L)
BB 24 92 77 20
BC 27 103 87 23
BD 29 111 99 26
CB 29 111 93 25
CC 33 124 10 3
CD 36 135 121 32
DB 34 130 110 29
DC 39 146 126 33
DD 42 158 144 38
2 pass arrangement compact water box
LEAVING WATER TEMPERATURE OUT OF
RANGE
The YVWA chiller line has a maximum leaving
water temperature of 60°F (15.6°C). Where process
applications require a chilled water temperature higher
than what the chiller provides, a simple piping change
can fix the problem. By using a mixture of chiller-
cooled water and returning process water, the chilled
water entering the process can be held at the desired
temperature as shown in Figure 34 on page 55. A
tank can also be used to meet high leaving liquid tem-
perature requirements.
PIPEWORK ARRANGEMENT
Piping arrangement vary according to design and facil-
ity application. Figure 33 on page 54 is a suggested
piping arrangement for single unit installations. For
multiple unit installations, each unit could be piped as
shown below.
MINIMUM WATER VOLUME
Include as much water volume as possible in a chilled
water loop, which increases the thermal mass and fly-
wheel effect within the system. More water promotes
stable water temperature control and increases reliabil-
ity by reducing compressor cycling.
TABLE 17 - WATER VOLUME FOR APPLICATIONS
APPLICATION
GALLON/TON
RATIO
L/KW
Ratio
Air Conditioning 5-8 (min of 5) 5.5-8.8 (min of 3.3)
Process 7-11 (min of 7) 7.7-12.3 (min of 4.4)
Install a tank or increase pipe sizes to provide suffi-
cient water volume.
LD07069
COOLING
TOWER
STRAINER
COOLING
TOWER
PUMP
COOLING
UNIT
CONTROLLED COOLING
TOWER BYPASS VALVE
(IF NECESSARY)
FLOW SWITCH
C = COMPRESSOR
M = MOTOR
CONDENSER
COOLER
C
M
CHILLED
WATER PUMP
STRAINER
COOLING
LOAD
FIGURE 33 - SCHEMATIC OF A TYPICAL PIPING ARRANGEMENT
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