Figure 38 - Pressure Probe Direction; Figure 39 - Air Flow Switch Connections - York AHU Operation And Maintenance

FORM 102.20-OM2
ISSUE DATE: 6/01/2015
AIRFLOW

FIGURE 38 - PRESSURE PROBE DIRECTION

FIGURE 39 - AIR FLOW SWITCH CONNECTIONS

JOHNSON CONTROLS
TOP VIEW OF UNIT
POSITIVE PRESSURE / AIR BLOWN THROUGH HEATER
BLOWER
PICK UP T UBE TOWARDS BLOWER
ATTACHED TO HIGH PORT OF AIRFLOW SWITCH
NEGATIVE PRESSURE / AIR DRAWN THROUGH HEATER
PICK UP TUBE TOWARDS BLOWER
ATTACHED TO LOW PORT OF AIRFLOW SWITCH
MOUNTING
BRACKET
HIGH PORT
SECTION 2 - START-UP AND OPERATION
HEATER
AIRFLOW
BLOWER
HEATER
C
NO
NC
LOW PORT
2
LD14268
LD14270
49