49
C06053
Fig. 62
−
EconoMi$er IV Functional View
EconoMi$er IV Standard Sensors
Table 20 provides a summary of EconoMi$er IV.
Troubleshooting instructions are enclosed. A functional
view of the EconoMi$er is shown in Fig. 62. 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.
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$er IV can be used for free
cooling. The sensor is factory-installed on the
EconoMi$er IV in the outdoor airstream. See Fig.59. The
operating range of temperature measurement is 40
to
100
F (4
to 38
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. 63. This
sensor is factory installed. The operating range of
temperature measurement is 0
°
to 158
F (
−
18
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$er IV is equipped with an ambient
temperature lockout switch located in the outdoor
airstream which is used to lock out the compressors below
a 42
F (6
C) ambient temperature. See Fig. 59.
SUPPLY AIR
TEMPERATURE
SENSOR
(SEALED
INSIDE CRIMP
END)
SUPPLY
AIR TEMPERATURE
SENSOR MOUNTING
LOCATION
C06033
Fig. 63
−
Supply Air Sensor Location
EconoMi$er IV Control Modes
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 controller. See
Fig. 62 for wiring information.
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 is supplied from the
factory with a supply
−
air temperature sensor and an
outdoor
−
air temperature sensor. This allows for operation
of the EconoMi$er IV with outdoor air dry bulb
changeover control. Additional accessories can be added
to allow for different types of changeover control and
operation of the EconoMi$er IV and unit.
Summary of Contents for 581J-17-28
Page 73: ...73 APPENDIX IV WIRING DIAGRAMS cont C160042 Fig 72 581J D17 D28 Power Diagram 208 230 3 60 ...
Page 74: ...74 APPENDIX IV WIRING DIAGRAMS cont C160043 Fig 73 581J D17 D28 Power Diagram 460 3 60 ...
Page 75: ...75 APPENDIX IV WIRING DIAGRAMS cont C160044 Fig 74 581J D17 D28 Power Diagram 575 3 60 ...
Page 80: ...80 APPENDIX IV WIRING DIAGRAMS cont C160049 Fig 79 RTU OPEN Wiring Diagram ...
