Table of Contents
Advertisement
LEGEND
DCV — Demand Controlled Ventilation
IAQ — Indoor Air Quality
LA — Low Ambient Lockout Device
OAT — Outdoor-Air Temperature
POT — Potentiometer
RAT — Return-Air Temperature
2500
2000
1500
1000
500
0
0.05
STATIC PRESSURE (in. wg)
Fig. 24 — Barometric Flow Capacity
30
25
20
15
10
5
0
0.13
0.20 0.22
0.25
STATIC PRESSURE (in. wg)
Fig. 25 — Outdoor-Air Damper Leakage
All manuals and user guides at all-guides.com
FOR OCCUPANCY CONTROL
REPLACE JUMPER WITH
FIELD-SUPPLIED TIME CLOCK
Potentiometer Defaults Settings:
Power Exhaust
Middle
Minimum Pos.
Fully Closed
DCV Max.
Middle
DCV Set
Middle
Enthalpy
C Setting
Fig. 23 — EconoMi$er IV Wiring
0.15
0.25
0.30 0.35 0.40
0.45
0.50
NOTES:
1. 620 ohm, 1 watt 5% resistor should be removed only when using differential
enthalpy or dry bulb.
2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power
supply, it cannot have the secondary of the transformer grounded.
3. For field-installed remote minimum position POT, remove black wire jumper
between P and P1 and set control minimum position POT to the minimum
position.
6000
5000
4000
3000
2000
1000
0
0.05
Fig. 26 — Return-Air Pressure Drop
D. EconoMi$er IV Standard Sensors
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. 17. The operating range of temperature
measurement is 40 to 100 F.
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. 27. This sensor
is factory installed. The operating range of temperature mea-
surement is 0° to 158 F. See Table 3 for sensor temperature/
resistance values.
—
—
25
0.10
0.15
0.20
0.25
0.30
STATIC PRESSURE (in. wg)
0.35
Advertisement
Table of Contents
