Bryant Preferred 549J 04, Installation Instructions Manual

Page: 43 / 48

43
RTU Open Control System
For details on operating units equipped with the factory-in-
stalled RTU Open controller, refer to the “Factory-Installed
RTU Open Multi-Protocol Controller Control, Start-Up, Oper-
ation 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 “Cooling
Lock-Out” setting and configure for the specific job requirements.
Step 12 — 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$ER IV OCCUPANCY SWITCH
See Fig. 56 for general EconoMi$er IV wiring. External occu-
pancy control is managed through a connection on the Controls
Connections 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 13 — 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$er IV)
• Outdoor enthalpy sensor
• Differential enthalpy sensor
• CO
2
sensor
• Smoke Detector (Return Air and/or Supply Air)
• Louvered hail guard
• Motormaster
® head pressure controls
• Phase monitor control
Refer to separate installation instructions for information on in-
stalling these accessories.
Fig. 56 — EconoMi$er IV Wiring