Install Instructions

36
Tech.Doc - 03/21 - Subject to change. © Belimo Aircontrols (USA), Inc.
Freeze Protection
• Outdoor air is 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 energized indicating occupied state of operation.
• Compressor 1 is de-energized
2
.
• Compressor 2 is de-energized
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
.
Supply Air Setpoint
• Damper Pos output is modulated from minimum to closed to
maintain supply air setpoint.
Possible Modes of Operation
3
: Heating , Free Cooling and Ventilation.
Energy Module Option Functions
1
Purge
1
(Purge Control in Settings Menu must be turned on to enable and AC 24
V applied to AUX1)
• 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 may or may not be energized (occupied or unoccupied state).
• Compressor 1 may or may not be energized depending on thermostat
call for stage 1 cooling
2
.
• Compressor 2 may or may not be energized 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 output goes to value set in Purge Dmp Set.
Possible Co-existing Modes of Operation
3
:
Mechanical Cooling, Heating.
Damper Override
• IF Remote Dmp Cntrl is turned on (enabled) in Settings menu
AND G powered
THEN Damper Pos will go to the value of the signal input
(DC 0...10 V)
at AUX2.
Note:
If outdoor air is suitable for “free cooling” and damper is override
to closed position, there will be no cooling.
Indoor 2 Speed Fan
Thermostat
Signal
Economizing
Available
OAT Energy
Module
Fan Relay
Fan
Speed
ZIP Econ /
RTU Mode
G, Y1,
not Y2
No
N/A
Closed
Low
1 Stage DX
G, Y1,
not Y2
Yes
>50ºF
Open
High
Economizing
G, Y1,
not Y2
Yes
<50ºF
Closed
Low
Economizing
G, Y1, Y2
No
N/A
Open
High
2 Stage DX
G, Y1, Y2
Yes
N/A
Open
High
Integrated
Economizer
G, W1/O/B
No
N/A
Open
High
Heating
G, W1/O/B
Yes
N/A
Open
High
Heating
G, not Y1, not
W1/O/B
No
N/A
Closed
Low
Ventilation
G, not Y1, not
W1/O/B
Yes
N/A
Closed
Low
Ventilation
not G, not Y1,
not W1/O/B
No
N/A
Open
Off
Unoccupied
3
not G, not Y1,
not W1/O/B
Yes
N/A
Open
Off
Unoccupied
When indoor fan is on high speed, the high speed fan minimum damper
position setpoints Vent Min Pos and DCV Min Pos will be referenced as
the minimums for damper control.
When indoor fan is on low speed, the low speed fan minimum damper
position setpoints Low Sp Vent Min and Low Sp DCV Min will be
referenced as the minimums for damper control.
Note:
Indoor fan speed will operate according to the above table
whether in Occupied or Unoccupied.
Note:
If RTU equipped with fan speed switching relays from the factory,
an Energy Module is not required to set up 2 Speed Fan. See 2 Speed
Fan Op in settings menu for more information.
ZIP Economizer
Method of Operation