JOHNSON CONTROLS
49
SECTION 2 - START-UP AND OPERATION
FORM 102.20-OM2
ISSUE DATE: 6/01/2015
2
TOP VIEW OF UNIT
POSITIVE PRESSURE / AIR BLOWN THROUGH HEATER
NEGATIVE PRESSURE / AIR DRAWN THROUGH HEATER
BLOWER
BLOWER
HEATER
HEATER
AIRFLOW
PICK UP TUBE TOWARDS BLOWER
ATTACHED TO HIGH PORT OF AIRFLOW SWITCH
PICK UP TUBE TOWARDS BLOWER
ATTACHED TO LOW PORT OF AIRFLOW SWITCH
AIRFLOW
FIGURE 38 -
PRESSURE PROBE DIRECTION
LD14268
C
NO
NC
HIGH PORT
LOW PORT
MOUNTING
BRACKET
FIGURE 39 -
AIR FLOW SWITCH CONNECTIONS
LD14270