FORM 145.05-EG2 (618)
JOHNSON CONTROLS
77
Field Wiring Inputs and Outputs
• Unit Shut Down (Emergency Stop) Input
• Occupancy Input
• Zone Temperature Input
• VAV Heat Relay Output
• Occupancy Indication Output
• Alarm Output
• Pump Start Output
Standard Control Sequences
• Unit can be indexed between Occupied and Unoccupied via four methods:
1. Manually via OFF-AUTO-ON switch
2. Remotely via Field Wiring Input
3. Remotely via Building Automation System (BAS) (BACnet
®
or Modbus
™
)
4. Automatically via internal scheduling
• Control sequences for constant volume (CV), VAV, and Flexsys
™
(Underfloor VAV)
built in.
• For VAV operation, four Supply Air Temperature setpoint reset sequences can be
selected:
1. No Reset, fixed Supply Air Temperature setpoint
2. Reset via Return/Zone Temperature
3. Reset via Outside Air Temperature
4. Reset via VFD Speed
• Occupied Heating
• Unoccupied Heating (Night Set Back)
• Morning Warm-up
• Economizer Sequences Built-In
1. Waterside Economizer with Adjustable Approach setpoint
2. Airside Dry Bulb (Units Equipped with Mixing Box)
3. Airside Single Enthalpy (Units Equipped with Mixing Box)
4. Airside Dual Enthalpy (Units Equipped with Mixing Box)
Note:
Economizer sequences allow for economizing with mechanical cooling when
Summary of Contents for L-Series
Page 1: ...FORM 145 05 EG2 618 ENGINEERING GUIDE Water Cooled Self Contained Units L Series Vertical ...
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Page 35: ...FORM 145 05 EG2 618 JOHNSON CONTROLS 35 OVERVIEW OF SERVICE CLEARANCES LSWU025 040 MODELS ...
