Bryant Legacy 549J 12 Series, Руководство по установке

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2-Speed Indoor Fan Motor System with Variable
Frequency Drive (Factory-Installed Option)
For details on operating 549J 2-stage cooling units equipped
with the factory-installed 2-speed indoor fan motor option, re -
fer to the Variable Frequency Drive (VFD) Installation, Start-
Up and Service Instructions.
RTU OPEN Controller (Factory option)
For details on operating 549J units equipped with the factory-
installed RTU Open controller option, refer to the Factory-In -
stalled Option RTU Open Multi-Protocol Controller Controls,
Start-Up, Operation and Troubleshooting manual.
Controller Options
LOW AMBIENT
If the unit comes with Electro-Mechanical (EM) control, then
no adjustment is necessary.
If the unit comes with the RTU Open control option, then refer
to its installation control manual for details on adjusting “Cool -
ing Lock-Out” setting and configure for the specific job
requirements.
Step 11 — Adjust Factory-Installed Options
SMOKE DETECTORS
Smoke detector(s) will be connected at the Controls Connec
-
tions Board, at terminals marked “Smoke Shutdown.” Cut
jumper JMP 3 when ready to energize unit.
ECONOMI$ER IV OCCUPANCY SWITCH
See Fig. 53 for general EconoMi$er IV wiring. External occu
-
pancy control is managed through a connection on the Central
Terminal Board.
If external occupancy control is desired, connect a time clock
or remotely controlled switch (closed for Occupied, open for
Unoccupied sequence) at terminals marked OCCUPANCY.
Cut jumper JMP 2 to complete the installation.
Step 12 — Install Accessories
Available accessories include:
• Roof curb
• Thru-base connection kit (must be installed before unit is
set on curb)
• Electric heaters and single-point connection kits
• Manual outside air damper
• Two-position motorized outside air damper
• EconoMi$er
®
IV (with control)
• EconoMi$er2 (without control/for external signal)
• Power Exhaust
• Differential dry-bulb sensor (EconoMi$er IV)
• Outdoor enthalpy sensor
• Differential enthalpy sensor
• CO
2
sensor
• Smoke Detector (Return Air and/or Supply Air)
• Louvered hail guard
• Motormaster
®
head pressure controls
• Phase monitor control
Refer to separate installation instructions for information on in -
stalling these accessories.
Fig. 53 — EconoMi$er IV Wiring