Jetson
www.JetsonHVAC.com
54
Construct and install piping in accordance with all
local, state and national codes.
Supply and insulate the chilled water piping as
required, to prevent sweating and minimize heat
gain under normal operating conditions. Chilled
water piping must rise above the chiller to ensure
the evaporator is full of water and void of air at all
times. Install thermometers in the lines to monitor
evaporator
entering
and
leaving
water
temperatures.
FWCD chillers have manual balancing ball-valves
in the entering water lines. They may be used to
establish a balanced water flow. Both the entering
and leaving water lines have valves that can be
used to shutoff/isolate the evaporator and
condenser for service.
CAUTION
Equipment Damage!
To prevent equipment damage, you MUST
follow instructions below:
•
Bypass unit when using a flushing
agent.
•
Chilled water piping must rise
above the chiller to ensure the
evaporator is full of water and void
of air at all times.
•
Do not over tighten connections.
Water Flow Rates
Establish balanced water flow through both the
evaporator and condenser. Flow rates should fall
between the minimum and maximum values given
in General Data Table. Flow rates above or below
these values can cause equipment damage or
improper unit operation. The evaporator and
condenser water pressure drop can be read
manually using the factory-installed condenser
inlet and outlet pressure gauge service ports.
Readings should approximate those shown by the
pressure drop charts for the individual chillers
Note: Pressure drop is an approximation and is to
be used as a tool to estimate flow rate and as an
aid to waterside system piping design. If an
accurate measurement of flow rate is required, an
accurate flow meter must be installed in the
system.
Chilled Water System Volume
Minimum system volume requirements are
indicated in the following table. Special
applications may deviate from these numbers as
directed by Jetson engineering. Operation below
these volumes will cause unacceptable system
control problems and the potential for evaporator
failure.
Table 13 Recommended Minimum required system volume
Unit Size (tons)
Volume (gal)
20
144
30
216
45
324
55
396
65
468
75
540
85
612
Summary of Contents for FWCD Series
Page 1: ...FWCD Series Chillers Installation Operation Maintenance...
Page 2: ...Jetson www JetsonHVAC com 2...
Page 30: ...Jetson www JetsonHVAC com 30 Figure 4 FWCD array dimensions brazed plate condenser...
Page 31: ...Jetson www JetsonHVAC com 31 Figure 5 FWCD dimensions shell and tube condenser...
Page 32: ...Jetson www JetsonHVAC com 32 Figure 6 FWCD array dimensions shell and tube condenser...
Page 33: ...Jetson www JetsonHVAC com 33 Figure 7 FWCD dimensions remote condenser...
Page 34: ...Jetson www JetsonHVAC com 34 Figure 8 FWCD array dimensions remote condenser...
Page 82: ...Jetson www JetsonHVAC com 82 Wiring Figure 26 FWCD wiring schematic...
Page 83: ...Jetson www JetsonHVAC com 83 Figure 27 FWCD wiring schematic continued...
Page 84: ...Jetson www JetsonHVAC com 84 Figure 28 FWCD dual circuit secondary wiring schematic...
Page 85: ...Jetson www JetsonHVAC com 85 Figure 29 FWCD dual circuit secondary wiring schematic continued...
Page 86: ...Jetson www JetsonHVAC com 86 Figure 30 Field wiring FWCD single unit single circuit...
Page 87: ...Jetson www JetsonHVAC com 87 Figure 31 Field wiring FWCD single unit dual circuit...