Install Instructions

35
Tech.Doc - 03/21 - Subject to change. © Belimo Aircontrols (USA), Inc.
Mechanical Cooling
• Outdoor air ambient conditions are analyzed by one of the 4
changeover strategies above (Single or Differential Dry Bulb; Single
or Differential Enthalpy) and has been deemed NOT suitable for “free”
cooling.
• Y1 is energized indicating a call for stage 1 cooling.
• Y2 may or may not be energized depending on thermostat call for
stage 2 cooling.
• W1/O/B is de-energized.
• G input could be energized or de-energized (occupied or unoccupied
state).
• Compressor 1 is on
2
.
• Compressor 2 may or may not be on based on thermostat call for
stage 2 cooling
2
.
• Fan Speed may or may not be energized (indoor fan is operating on
high or low speed). See Indoor 2 Speed Fan sequence under Energy
Module Option Functions
1
.
• Exhaust Fan is off
1
.
• Damper Pos output is at Vent Min Pos if indoor fan is on high speed.
Output is at Low SP Vent Min if indoor fan is on low speed.
DCV
1
• Outdoor air may or may not be suitable “for free cooling”; however
still utilizing fresh air for cooling
• Y1 may or may not be energized depending on thermostat call for
stage 1 cooling.
• Y2 may or may not be energized depending on thermostat call for
stage 2 cooling.
• W1/O/B may or may not be energized depending on thermostat call
for heating.
• G input is energized indicating occupied state.
• Compressor 1 may or may not be on depending on thermostat call
for stage 1 cooling
2
.
• Compressor 2 may or may not be on depending on thermostat call
for stage 2 cooling
2
.
• Fan Speed may or may not be energized (indoor fan is operating on
high or low speed). See Indoor 2 Speed Fan sequence under Energy
Module Option Functions
1
.
• Exhaust Fan is off
1
.
• Damper Pos – Minimum outdoor damper position will be modulated
based on CO2 levels. If indoor fan is on high speed and CO2 levels
are high, minimum damper position will be at Vent Min Pos; if CO2
levels are low, minimum damper position will be at DCV Min Pos.
As CO2 levels fluctuate, minimum damper position will modulate
between these 2 minimum settings. If indoor fan is on low speed, the
two minimum damper settings reference will change to Low SP Vent
Min and Low SP DCV Min respectively.
Possible Co-existing Modes of Operation
3
:
Mechanical Cooling, Heating.
Ventilation
• Outdoor air may or may not be suitable “for free cooling”.
• Y1 is de-energized.
• Y2 is de-energized.
• W1/O/B is de-energized.
• G input is energized indicating occupied state of operation.
• Compressor 1 is off
2
.
• Compressor 2 is off
2
.
• Fan Speed will be energized (indoor fan is operating on low speed).
See Indoor 2 Speed Fan sequence under Energy Module Option
Functions
1
.
• Exhaust Fan is off
1
.
• Damper Pos output is at Low SP Vent Min
1
.
Possible Co-existing Modes of Operation
3
: DCV, Heating.
Heating
• Outdoor air may or may not be suitable “for free cooling”.
• Y1 is off (unless RTU is a heat pump).
• Y2 is off (unless RTU is a heat pump).
• W1/O/B is energized.
• G input may or may not be energized (occupied or unoccupied state).
• Compressor 1 is de-energized (unless Heat Pump Op in Settings
menu is turned on)
2
.
• Compressor 2 is de-energized (unless Heat Pump Op in Settings
menu is turned on)
2
.
• Fan Speed will be de-energized (indoor fan is operating on high
speed).
See Indoor 2 Speed Fan sequence under Energy Module Option
Functions
1
.
• Exhaust Fan is off
1
.
• Damper Pos output is at Vent Min Pos or damper in DCV position.
See DCV mode
1
.
Unoccupied
• Outdoor air may or may not be suitable “for free cooling”.
• Y1 may or may not be energized depending on thermostat call for
stage 1 cooling.
• Y2 may or may not be energized depending on thermostat call for
stage 2 cooling.
• W1/O/B may or may not be energized depending on thermostat call
for stage 1 heating.
• G input is de-energized (unoccupied state).
• Compressor 1 may or may not be on depending on thermostat call
for stage 1 cooling
2
.
• Compressor 2 may or may not be on depending on thermostat call
for stage 2 cooling
2
.
• Fan Speed may or may not be energized (indoor fan is operating on
high or low speed or not at all). See Indoor 2 Speed Fan sequence
under Energy Module Option Functions
1
.
• Exhaust Fan is off
1
.
• Damper Pos output is closed to Outdoor Air.
Possible Co-existing Modes of Operation
3
: Free Cooling,
Integrated Cooling, Mechanical Cooling, Heating, or Purge.
ZIP Economizer
Method of Operation