Bryant 558F User Manual
Page 17
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2. Locate the minimum position (MIN POS) potentiome-
ter. Turn the potentiometer full CCW to fully close the
outdoor air dampers. Turn the potentiometer gradu-
ally clockwise (CW) to the desired position. See Fig. 17.
3. Replace the filter access panel. See Fig. 19. Ensure
the filter access panel is securely engaged.
4. Calculate the minimum airflow across the
EconoMi$er.
a. Calculate % of outside air using the following
formula.
% Outdoor air through EconoMi$er
b. Multiply total CFM by percentage outdoor air,
this gives outdoor air volume in CFM.
IX. STEP 9 — INSTALL ALL ACCESSORIES
After all the factory-installed options have been adjusted,
install all field-installed accessories. Refer to the accessory
installation instructions included with each accessory.
A. Motormaster® I Control (–20 F) Installation (558F180 and
210 Only)
Install Field-Fabricated Wind Baffles
Wind baffles must be field-fabricated for all units to ensure
proper cooling cycle operation at low ambient temperatures.
See Fig. 26 for baffle details. Use 20-gage, galvanized sheet
metal, or similar corrosion-resistant metal for baffles. Use
field-supplied screws to attach baffles to unit. Screws should
be
1
/
4
-in. diameter and
5
/
8
-in. long. Drill required screw holes
for mounting baffles.
Install Motormaster I Controls
One Motormaster I control is required on size 180 and 210
units. The Motormaster I control must be used in conjunction
with the Accessory Fan Motor Sequencing Kit and Winter
Start Kit (purchased separately). The Motormaster I device
controls outdoor fan no. 1 while outdoor fans no. 2 and 3 are
sequenced off by the Accessory Fan Motor Sequencing Kit.
Accessory Fan Motor Sequencing Kit — Install the Accessory
Fan Motor Sequencing Kit per instruction supplied with
accessory (purchased separately).
Winter Start Time Delay Relay Kit — Install the kit per the in-
structions supplied with the accessory (purchased separately).
Sensor Assembly — Install the sensor assembly in the loca-
tion shown in Fig. 27.
Motor Mount — To ensure proper fan height, replace the
existing motor mount with the new motor mount provided
with accessory.
% Outdoor
air
=
Mixture Temp – Return Air Temp
Outdoor Temp – Return Air Temp
WARNING: Personal Injury Hazard. Avoid possi-
ble injury by keeping fingers away from damper blades.
CAUTION: To avoid damage to the refrigerant
coils and electrical components, use recommended
screw sizes only. Use care when drilling holes.
20 mA LED
1k ohm Potentiometer
2 to 10 VDC at
0 to 2000 ppm
CO2 Sensors:
Rem ote
M inim um Position
Rem ote
LED
Outdoor Air Enthalpy
CROUTENT001A00
Return Air Enthalpy
CRRETENT001A00
Line
Voltage
CO
CO
COM
DAT
COM
REM
POT
COM
LED
COM
2
2
OAT
COM
OAH
+15V
RAT
COM
RAH
+15V
C
O
M PW
O
U
T T
T
Violet
C
O
M PW
O
U
T T
T
Violet
Field-supplied W iring
W iring Included
470 ohm
5 watt
Resistor
24 VAC m ust be present
on BI for the system to be
unoccupied.
Unoccupied Control
(Part num ber on the control
m ust be AD-DM E1701-1
or AD-DM E1711-1.)
Unoccupied
Contact
Tan
Violet
W hite
Red
Tan
Violet
W hite
Red
24 V
A
C
20 V
A
NOT
USED
1
2
-
(+)
CRCDXSEN004A00
Fig. 25 — Typical EconoMi$er Sensor Wiring