JOHNSON CONTROLS
23
SECTION 2 - START-UP AND OPERATION
FORM 102.20-OM2
ISSUE DATE: 6/01/2015
2
FAN
TYPE
FAN
CLASS
FAN SIZE
k
n
FAN
TYPE
FAN
CLASS
FAN SIZE
k
n
MPQS
1
330
5968.62
N/A
MPQN
2
330
5968.62
N/A
MPQS
2
330
5968.62
N/A
MPQN
3
330
5968.62
N/A
MPQS
3
330
5968.62
N/A
MPQN
1
365
7290.21
N/A
MPQS
1
365
7290.21
N/A
MPQN
2
365
7290.21
N/A
MPQS
2
365
7290.21
N/A
MPQN
3
365
7290.21
N/A
MPQS
3
365
7290.21
N/A
MPQN
1
402
8869.55
N/A
MPQS
1
402
8869.55
N/A
MPQN
2
402
8869.55
N/A
MPQS
2
402
8869.55
N/A
MPQN
3
402
8869.55
N/A
MPQS
3
402
8869.55
N/A
MPQN
1
445
10827.92
N/A
MPQS
1
445
10827.92
N/A
MPQN
2
445
10827.92
N/A
MPQS
2
445
10827.92
N/A
MPQN
3
445
10827.92
N/A
MPQS
3
445
10827.92
N/A
MPQN
1
490
13135.01
N/A
MPQS
1
490
13135.01
N/A
MPQN
2
490
13135.01
N/A
MPQS
2
490
13135.01
N/A
MPQN
3
490
13135.01
N/A
MPQS
3
490
13135.01
N/A
SF
2
165
1361.00
N/A
SF
2
105
592.00
N/A
SF
2
182
1673.00
N/A
SF
2
122
842.00
N/A
SF
2
200
1942.00
N/A
SF
2
135
963.00
N/A
SF
2
222
2454.00
N/A
SF
2
150
1147.00
N/A
SF
2
245
3010.00
N/A
TABLE 2 -
AIR MEASURING DEVICE CONNECTIONS (CONT'D)
Air Measuring at the Fan Inlets
•
COMETER is a probe attached to the fan bearing
support on Comefri Forward Curve fans from size
7 x 7 up to 18 x 18. The probe is located on the
outboard side of the housed fan assembly. The
probe is piped to the negative (-) port of a factory
mounted transducer on the fan wall. The positive
(+) port is left open to the fan section. Wiring
is not provided to the transducer unless factory
packaged controls were selected.
• PIEZORING (PIEZOMETER) is a fitting or se
-
ries of fittings in the inlet cone(s) of housed fans
larger than 18 x 18 and all sizes of Plenum fans
that are combined into a single connection piped
to the negative (-) port of a factory mounted trans-
ducer on the fan wall. The positive (+) port is left
open to the fan section. Wiring is not provided
to the transducer unless factory packaged controls
were selected.
The fan manufacturer does not recom-
mend placement of the flow measuring
probes inside the fan inlet cone in the
path of airflow. These devices create
disturbances and unpredictable perfor-
mance losses.
FIGURE 11 -
HIGH AND LOW CONNECTIONS FOR
AN IN FAN AIR MONITORING SYSTEM
LD17231