JOHNSON CONTROLS
24
FORM 102.20-OM2
ISSUE DATE: 6/01/2015
SECTION 2 - START-UP AND OPERATION
FIGURE 12 - HIGH AND LOW CONNECTIONS AND
ASSOCIATED TUBING FOR FAN MOUNTED AIR
MONITORING SYSTEM
LD17232
FIGURE 13 - PORT LOCATIONS FOR FAN MOUNT-
ED AIR MONITORING SYSTEM
LD17233
High Port
Low Port
Air Measuring at Unit Outside Air Inlets
• AMS-60 used on indoor air handlers usually mea-
sure outside air. This can be provided with one
or two pairs of positive (+ or High) and negative
(- or Low) pressure tube connections. Connect
(+) & (-) respectively to the (+) & (-) ports of the
transducer(s). Wiring & transducer are not pro-
vided unless factory packaged controls were se-
lected.
• EAML used on outdoor air handlers usually to
measure outside air. This can be provided with
one or two pairs of positive (+ or High) and nega-
tive (- or Low) pressure tube connections. Con-
nect (+) & (-) respectively to the (+) & (-) ports
of the transducer(s). Wiring & transducer are not
provided unless factory packaged controls were
selected.
AMS-60 Damper
General
The YORK AMS-60 is an airflow monitoring device
which combines the functions of control damper and
airflow measurement station into one assembly. It is
ideally suited for factory installation in air handling
units. The YORK AMS-60 is tested to AMCA Stan-
dard 611-95 and qualifies to bear the AMCA Ratings
Seal for Airflow Measurement Performance.
Damper Operation
The AMS-60 airflow monitoring damper design incor-
porates a low leakage control damper with stationary,
vertical air monitoring blades and air straightening sec-
tion into one assembly. The control damper utilized for
modulating airflow is the ultra-low leak Ruskin CD-
60 with its standard blade and jamb seals used for low
leakage. Strategically placed stationary and vertical
airflow sensing blades measure the airstream velocity
pressure. Air tubing/piping connections are provided
to connect the sensing blades to an optional factory-
mounted transducer. The transducer converts the ve-
locity pressure from the sensing blades to an electri-
cal output signal for the Building Automation System
(BAS). The output signal corresponds directly to flow
through the damper. The BAS compares this signal to
the design CFM setpoint as determined by the particu-
lar mode of operation of the HVAC system. In normal
operation, this setpoint corresponds to the minimum
outside air ventilation required by the system design
to meet ASHRAE Standard 62. Based on the differ-
ence between the actual CFM reading and the desired
setpoint, the BAS would send a signal to the optional,
factory-mounted control damper Actuator to position
the damper blades as necessary to ensure that the actual
outside airflow meets the desired level.
No Calibration Required
The AMS-60 airflow monitoring damper is factory cal-
ibrated. Calibration is not required at the jobsite.
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