Economi$Er Iv (Field-Installed Accessory) - Carrier 48FC M20 Series Service And Maintenance Instructions

EconoMi$er IV (Field-Installed Accessory)

IMPORTANT: For 48FC*20-30 rooftop units EconoMi$er IV
is available as a field-installed accessory only.
ECONOMI$ER IV STANDARD SENSORS
Troubleshooting instructions are enclosed. A functional view of
the EconoMi$er ® IV accessory is shown in Fig. 64. Typical set-
tings, sensor ranges, and jumper positions are also shown. An
EconoMi$er IV simulator program is available to help with
EconoMi$er IV training and troubleshooting. See Table 12 for
further details.
LEGEND
DCV — Demand Controlled Ventilation
IAQ — Indoor Air Quality
LA — Low Ambient Lockout Device
OAT — Outdoor-Air Temperature
POT — Potentiometer
RAT — Return-Air Temperature
Fig. 65 — Typical EconoMi$er IV (W7212 Controller) Wiring
Fig. 64 — EconoMi$er IV Functional View
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