Table of Contents
Advertisement
19
LED ON
18
D
17
LED ON
LED OFF
16
15
14
LED OFF
13
12
11
10
9
40
45
50
55
60
65
DEGREES FAHRENHEIT
Fig. 34 --- Outside Air Temperature
Changeover Set Points
CONTROL
CURVE
A
B
C
D
Occupancy Control
The factory default configuration for the EconoMi$er IV control
is occupied mode. Occupied mode is provided by the black
jumper from terminal TR to terminal N. When unoccupied mode
is desired, install a field-supplied timeclock function in place of
the jumper between TR and N. (See Fig. 27.) When the timeclock
contacts are closed, the EconoMi$er IV control will be in
occupied mode. When the timeclock contacts are open (removing
the 24-v signal from terminal N), the EconoMi$er IV will be in
unoccupied mode.
C
LED ON
B
LED ON
LED OFF
A
LED OFF
100
70
75
80
85
90
95
C06035
CONTROL POINT
APPROX. deg. F (deg. C)
AT 50% RH
73 (23)
70 (21)
67 (19)
63 (17)
(18)
60
(16)
A
55
(13)
B
50
C
(10)
D
45
(7)
40
(4)
35
(2)
35
40
45
50
55
60
(2)
(4)
(7)
(10)
(13)
(16)
APPROXIMATE DRY BULB TEMPERATURE--degrees F (degrees C)
Fig. 36 --- Enthalpy Changeover Set Points
ECONOMI$ER IV
Fig. 35 --- Return Air Temperature or Enthalpy
85
90
95
(29)
(32)
(35)
80
(27)
75
(24)
70
(21)
65
A
B
C
D
65
70
75
80
85
90
95
(18)
(21)
(24)
(27)
(29)
(32)
(35)
Demand Controlled Ventilation (DCV)
When using the EconoMi$er IV for demand controlled
ventilation, there are some equipment selection criteria which
should be considered. When selecting the heat capacity and cool
capacity of the equipment, the maximum ventilation rate must be
evaluated for design conditions. The maximum damper position
must be calculated to provide the desired fresh air.
Typically the maximum ventilation rate will be about 5 to 10%
more than the typical cfm required per person, using normal
outside air design criteria.
29
ECONOMI$ER IV
CONTROLLER
RETURN AIR
SENSOR
RETURN DUCT
(FIELD-PROVIDED)
Sensor Mounting Location
100
105
110
(38)
(41)
(43)
HIGH LIMIT
CURVE
100
105
110
(38)
(41)
(43)
GROMMET
C06036
C06037
Advertisement
Table of Contents
