Accessories - Bryant 580G Installation, Start-Up And Service Instructions Manual

NOTES:
1. Unless otherwise specified, all dimensions are to outside of part.
2. Dimensions are in inches.
Fig. 30 — Barometric Relief Damper and Power Exhaust Mounting Details
XI. ACCESSORIES
After all the factory-installed options have been adjusted, in-
stall all field-installed accessories. Refer to the accessory in-
stallation instructions included with each accessory.
A. Motormaster III Control Installation
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. 31 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
⁄ -in. diameter and ⁄ -in. long. Holes for wind baffles are pre-
1 5
4 8
punched in the unit sheet metal.
CAUTION: To avoid damage to the refrigerant coils
and electrical components, use recommended screw sizes
only.
The wind baffles attach to flanges formed on the outer sheet
metal of the unit where the condenser coil tube sheets
attach.
Install Motormaster III Controls
Only one Motormaster III control is required per unit.
Motor — The circuit no. 1 (lead compressor) outdoor-fan
motor (OFM) will need to be changed out in the field to
accommodate the Motormaster III accessory. The replace-
ment motor part no. is HD52AK652.
The no. 1 compressor is located at the left side of the unit
looking from the compressor end.
Sensor — Install the sensor for thermistor input control in
the location shown in Fig. 32. Connect sensor leads to the
violet and grey control signal leads on the Motormaster III
control.
Signal Selection Switch — Remove the cover of the Motor-
master III control. Set the switch to accept the thermistor
sensor input signal. Set the frequency to match the unit power
supply (60 Hz).
1
BOTH SIDES
0.312 DIA
HOLES
17.167
BETWEEN
HOLES
(TYPICAL)
4.62
NOTE: All dimensions are in inches. Material: 20 gage galvanized steel
or other non-corrosive material.
Fig. 31 — Motormaster III Baffle Details
Motormaster III Control — The recommended mounting
location is in the indoor fan section, mounted on the panel
that separates the indoor and outdoor sections.
Electrical Connections
WARNING: To avoid possibility of electrical shock and
personal injury, turn off all power to unit before mak-
ing electrical connections.
When replacing the OFM, reconnect the black, yellow, and
blue wires from the outdoor fan contactor to the black, yel-
low, and blue wires of the Motormaster III control. Run new
wires from the red, orange, and brown wires to the leads of
the new OFM. Connect the green wire from the control to
ground.
NOTE: On all 575-v units, 2 transformers (part no.
HT01AH851) must be used for each Motormaster III control
to lower the supply voltage to the control to 460-v. Transform-
ers can be mounted anywhere outside the control box.
—19—
77.7
CROSS-BREAK
78.7
18
61
0.5