Contacts sho wn in high enthalpy, Or unpowered state, Tr tr1 24vac – Bryant 548F User Manual
Page 15: Unit top
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15
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SHIPPING
SCREW
Fig. 13 — Horizontal Discharge Durablade
Economizer Installation
4
3
2
1
0
5
6
7
8
9
Example:
Given — Negative Pressure . . . . . . . . . . .0.2 in. wg
Outdoor
Air
. . . . . . . . . . . . . . . . . . 900 cfm
Determine — Setting = 5 in.
Fig. 14 — Durablade Economizer
Minimum Position Setting
Fig. 15 — Durablade Economizer Minimum
Position Damper Setting
UNIT
TOP
OAT
(TERMINALS ARE UP)
OUTSIDE AIR
SCREEN
MINIMUM
POSITION
OPEN
3
1
T
P
P1
T1
4
2
5
S
S
O
D
C
TR
B
REV. B
1 9 8 8 1 8 A
%
H
U
M
I
D
I
T
Y
90
70
60
30
10
D
C
B A
60 65 70 75
55
50
85
80
DAMPER
DAMPER
CLOSED
OPEN
OUTDOOR TEMP.
°F
R
E
V
.
9
7
-367
2
CW–SETPOINTS–CCW
CONTACTS SHO WN IN HIGH ENTHALPY
RUSH AT 24VAC
3 mA MIN. AT 11 VDC
CONTACT RATINGS: 1.5A RUN, 3.5A IN
OR UNPOWERED STATE
1
2
3
TR
TR1
24VAC
ENTHALPY CONTROL
ENTHALPY
CONTROL
HOOD
Fig. 16 — Outdoor-Air Thermostat/Enthalpy
Control Installation
LEGEND
OAT — Outdoor-Air Thermostat
NOTE: See unit wiring diagram for more details.
Fig. 17 — Wiring Connections for
Outdoor-Air Thermostat