48
EconoMi$er IV Standard Sensors
Table 21 provides a summary of EconoMi$er IV logic. Trou-
bleshooting instructions are enclosed. A functional view of the
EconoMi$er IV control is shown in Fig. 69. Typical settings,
sensor ranges, and jumper positions are also shown. An
EconoMi$er IV simulator program is available to help with
EconoMi$er IV training and troubleshooting.
Fig. 69 — EconoMi$er IV Functional View
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$er IV control can be used for free cooling. The sen-
sor is factory installed on the EconoMi$er IV control in the
outdoor airstream. See Fig. 70. The operating range of tem-
perature measurement is 40°F to 100°F (4°C to 38°C).
Fig. 70 — Supply Air Sensor Location
Supply Air Temperature (SAT) Sensor
The supply air temperature sensor is a 3 K thermistor located at
the inlet of the indoor fan. See Fig. 70. This sensor is factory
installed. The operating range of temperature measurement is
0°F to 158°F (–18°C to 70°C).
The temperature sensor looks like an eyelet terminal with wires
running to it. The sensor is located in the “crimp end” and is
sealed from moisture.
OUTDOOR AIR LOCKOUT SENSOR
The EconoMi$er IV is equipped with an ambient temperature
lockout switch located in the outdoor airstream which is used
to lock out the compressors below a 42°F (6°C) ambient tem-
perature. See Fig. 62.
EconoMi$er IV Control Modes
Determine the EconoMi$er IV control mode before set up of the
control. Some modes of operation may require different sensors.
The EconoMi$er IV control is supplied from the factory with a
supply-air temperature sensor and an outdoor-air temperature
sensor. This allows for operation of the EconoMi$er IV with out-
door air dry bulb changeover control. Additional accessories can
be added to allow for different types of changeover control and
operation of the EconoMi$er IVcontrol and unit. See Table 22.
* CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on
many different base units. As such, these kits may contain parts that will
not be needed for installation.
† 33ZCSENCO2 is an accessory CO
2
sensor.
** 33ZCASPCO2 is an accessory aspirator box re
q
uired for duct-
mounted applications.
†† CRCBDIOX005A00 is an accessory that contains both 33ZCSEN-
CO2 and 33ZCASPCO2 accessories.
OUTDOOR DRY BULB CHANGEOVER
The standard controller is shipped from the factory configured
for outdoor dry bulb changeover control. The outdoor air and
supply air temperature sensors are included as standard. For
this control mode, the outdoor temperature is compared to an
adjustable set point selected on the control. If the outdoor-air
temperature is above the set point, the EconoMi$er IV control
will adjust the outside air dampers to minimum position. If the
outdoor-air temperature is below the set point, the position of
the outside air dampers will be controlled to provided free
cooling using outdoor air. When in this mode, the LED next to
the free cooling set point potentiometer will be on. The
changeover temperature set point is controlled by the free cool-
ing set point potentiometer located on the control. See Fig. 71.
The scale on the potentiometer is A, B, C, and D. See Fig. 72
for the corresponding temperature changeover values and
Fig. 73 for damper leakage.
SUPPLY
AIR TEMPERATURE
SENSOR MOUNTING
LOCATION
SUPPLY AIR
TEMPERATURE
SENSOR
(SEALED
INSIDE CRIMP
END)
IMPORTANT: The optional EconoMi$er2 does not
include a controller. The EconoMi$er2 is operated by a 4
to 20 mA signal from an existing field-supplied control-
ler. See Fig. 68 for wiring information.
Table 22 — EconoMi$er IV Sensor Usage
APPLICATION
ECONOMI$ER IV WITH OUTDOOR AIR DRY BULB
SENSOR
Accessories Required
Outdoor Air
Dry Bulb
None. The outdoor air dry bulb sensor is factory
installed.
Differential
Dry Bulb
CRTEMPSN002A00*
Single Enthalpy
HH57AC078
Differential
Enthalpy
HH57AC078 and CRENTDIF004A00*
CO
2
for DCV
Control using a
Wall-Mounted
CO
2
Sensor
33ZCSENCO2
CO
2
for DCV
Control using a
Duct-Mounted
CO
2
Sensor
33ZCSENCO2† and
33ZCASPCO2**
O
R
CRCBDIOX005A00††
Summary of Contents for Preferred 581J04-14
Page 36: ...36 Fig 60 Integrated Gas Control IGC Board RED LED STATUS ...
Page 44: ...44 Fig 65 RTU Open Overlay for Economizer Wiring ...
Page 45: ...45 Fig 66 VFD Overlay for W2770 Controller Wiring ...
Page 100: ...100 Fig F 581J 08 09 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 101: ...101 Fig G 581J 11YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 102: ...102 Fig H 581J 12 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 103: ...103 Fig I 581J 04 06 YAC Power Diagram 208 230 1 60 APPENDIX D WIRING DIAGRAMS ...
Page 104: ...104 Fig J 581J 04 06 YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 105: ...105 Fig K 581J 04 06 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 108: ...108 Fig N 581J 07 12A B C YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 109: ...109 Fig O 581J 07 12A B C YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 110: ...110 Fig P 581J 08 09 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 111: ...111 Fig Q 581J 08 09 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 112: ...112 Fig R 581J 11 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 113: ...113 Fig S 581J 11 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 114: ...114 Fig T 581J 11 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 115: ...115 Fig U 581J 12 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 116: ...116 Fig V 581J 12 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 117: ...117 Fig W 581J 14 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 118: ...118 Fig X 581J 14 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 119: ...119 Fig Y 581J 14 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 120: ...120 Fig Z 581J 14 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 143: ...143 Fig AW RTU Open Wiring Diagram APPENDIX D WIRING DIAGRAMS ...