50
EconoMi$er IV Standard Sensors
Table 20 provides a summary of EconoMi$er IV Logic. A func
-
tional view of the EconoMi$er is shown in Fig. 66. Typical set
-
tings, sensor ranges, and jumper positions are also shown. An
EconoMi$er IV simulator program is available from Carrier to
help with EconoMi$er IV training and troubleshooting.
OUTDOOR AIR TEMPERATURE (OAT) SENSOR
The outdoor air temperature sensor (HH57AC074) is a 10 to
20 mA device used to measure the outdoor-air temperature. The
outdoor-air temperature is used to determine when the
EconoMi$er IV can be used for free cooling. The sensor is facto
-
ry-installed on the EconoMi$er IV in the outdoor airstream. (See
Fig. 67.) The operating range of temperature measurement is 40°F
to 100°F (4°C to 38°C). See Fig. 68.
*For single enthalpy control, the module compares outdoor enthalpy to
the ABCD set point.
†
Power at N terminal determines Occupied/Unoccupied setting: 24 vac
(Occupied), no power (Unoccupied).
**Modulation is based on the supply-air sensor signal.
††
Modulation is based on the DCV signal.
*** Modulation is based on the greater of DCV and supply-air sensor
signals, between minimum position and either maximum position (DCV)
or fully open (supply-air signal).
††† Modulation is based on the greater of DCV and supply-air sensor
signals, between closed and either maximum position (DCV) or fully
open (supply-air signal).
Fig. 66 —
EconoMi$er IV Functional View
Table 20 —
EconoMi$er IV Input/Output Logic
INPUTS
OUTPUTS
Demand
Controlled
Ventilation (DCV)
Enthalpy*
Y1 Y2
Compressor
N Terminal†
Outdoor
Return
Stage 1 Stage 2
Occupied
Unoccupied
Damper
Below set
(DCV LED off)
High (Free
Cooling LED off)
Low
On On
On
On
Minimum position
Closed
On Off
On
Off
Off Off
Off
Off
Low (Free
Cooling LED on)
High
On On
On
Off
Modulating** (between min.
position and full-open)
Modulating** (between closed
and full-open)
On Off
Off
Off
Off Off
Off
Off
Minimum position
Closed
Above set
(DCV LED on)
High (Free
Cooling LED off)
Low
On On
On
On
Modulating†† (between min.
position and DCV maximum)
Modulating†† (between closed
and DCV maximum)
On Off
On
Off
Off Off
Off
Off
Low (Free
Cooling LED on)
High
On On
On
Off
Modulating***
Modulating†††
On Off
Off
Off
Off Off
Off
Off
Summary of Contents for 48TC series
Page 40: ...40 Fig 56 Typical IGC Wiring Diagram...
Page 41: ...41 Fig 57 Integrated Gas Control IGC Board RED LED STATUS...
Page 47: ...47 Fig 62 RTU Open Overlay for Economizer Wiring...
Page 48: ...48 Fig 63 VFD Overlay for W2770 Controller Wiring...
Page 97: ...97 Fig D 48TC D17 D30 Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS...
Page 98: ...98 Fig E 48TC D17 D30 Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS...
Page 99: ...99 Fig F 48TC D17 D30 Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS...
Page 100: ...100 Fig G 48TC D17 D30 Control Diagram with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Page 104: ...104 Fig K PremierLink System Control Wiring Diagram APPENDIX D WIRING DIAGRAMS...
Page 106: ...106 Fig M RTU OPEN Wiring Diagram APPENDIX D WIRING DIAGRAMS...
Page 107: ...107 Fig N RTU OPEN Wiring Diagram with Humidi MiZer System APPENDIX D WIRING DIAGRAMS...
Page 109: ......