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Section 3 - Handling, storage, and installation
The following figure shows the performance data for
VCCA-20ULS/VCCA-20-P condensate pump (155 V
and 230 V, 60 Hz).
Flow, liters per hour
0
50
100
150
25
20
15
10
5
0
0
20
40
Flow, gallons per hour
Figure 38: VCCA pump performance data
This pump assembly has a black check
valve that prevents backflow into the
pump once discharged; the field must
install a loop trap at the highest point
but not to exceed maximum lift for this
pump.
Failure to install this loop trap could
result in failure to the check valve,
which would allow condensate to flow
back into the pump and may cause the
pump to short cycle repeatedly until the
pump fails.
The following image shows a field-installed loop trap
that is used to prevent over-pressuring the pump check
valve.
Figure 39: Loop trap
34
200
250
300
350
7
6
5
4
3
2
1
0
60
80
100
Factory-provided pump location and
installation
The condensate pump is factory-installed and piped to
the top area of the lower segment header piping area.
The pump discharge line is tagged
to let the field know that this must be
connected to the field drain before
running the AHUs.
Failure to comply can result in water
spraying over the unit and could cause
damage to the electrical components.
Condensate
discharge line
Figure 40: Condensate discharge line
Figure 41: Tag for pump discharge line
Form CRAH102.20-N1
Issue date: 03/11/2024
Johnson Controls
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