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3.
Press the
(Enter) button. ALARM ERASED displays.
4.
Press the
(Menu up/Exit) button to complete the action
and return to the previous menu.
NOTE: If the alarm still exists after clearing it, it is redisplayed
within 5 seconds.
RTU Open Controller (Factory Option)
For details on operating 547K*04-07 units equipped with the
factory-installed RTU Open controller option refer to the
Factory-Installed Option RTU Open Multi-Protocol Controller
Controls, Start-Up, Operation and Troubleshooting manual.
Controller Options
LOW AMBIENT
If the unit comes with electromechanical (EM) control, then no
adjustment is necessary.
If the unit comes with the RTU Open controller option, then re-
fer to its installation control manual for details on adjusting
"Cooling Lock-Out" setting and configure for the specific job
requirements.
Smoke Detectors
Smoke detectors are available as factory-installed options on
547K models. Smoke detectors may be specified for Supply
Air only or for Return Air without or with economizer, or in
combination of Supply Air and Return Air. Return Air smoke
detectors are arranged for vertical return configurations only.
All components necessary for operation are factory-provided
and mounted. The unit is factory-configured for immediate
smoke detector shutdown operation; additional wiring or mod-
ifications to unit terminal board may be necessary to complete
the unit and smoke detector configuration to meet project
requirements.
Units equipped with factory-optional Return Air smoke detec-
tors require a relocation of the sensor module at unit
installation. See Fig. 50 for the as-shipped location.
Return Air
Smoke Detetor
(As Shipped)
Fig. 50 — Return Air Smoke Detector,
Shipping Position
COMPLETING RETURN AIR SMOKE SENSOR
INSTALLATION
1.
Unscrew the 2 screws holding the Return Air Smoke
Detector assembly. See Fig. 51, Step 1. Save the screws.
2.
Turn the assembly 90 degrees and then rotate end to end.
Make sure that the elbow fitting is pointing down. See
Fig. 51, Step 2.
3.
Screw the sensor and detector plate into its operating posi-
tion using screws from Step 1. See Fig. 51, Step 3.
4.
Connect the flexible tube on the sampling inlet to the
sampling tube on the basepan.
ADDITIONAL APPLICATION DATA
Refer to the application data document "Factory Installed
Smoke Detectors for Small and Medium Rooftop Units 2 to
25 Tons" for discussions on additional control features of these
smoke detectors including multiple unit coordination.
Step 12 — Adjust Factory-Installed Options
SMOKE DETECTORS
Smoke detector(s) will be connected at the Unit Control Board
(UCB), at terminals marked "Smoke Shutdown." Detach the
jumper covering the Smoke Shutdown terminals on the UCB
and then attach the wiring harness from the smoke detector.
ECONOMI$ER IV OCCUPANCY SWITCH
See Fig. 52 on page 43 for general EconoMi$er
External occupancy control is managed through a connection
on the Unit Control 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.
Detach the jumper covering the "Occupancy" terminals on the
UCB and then attach the required connections.
Step 13 — Install Accessories
Available accessories include:
•
Roof curb
•
Thru-base connection kit (must be installed before unit is
set on curb)
•
Manual outside air damper
•
Two-position motorized outside air damper
•
EconoMi$er IV (with control and integrated barometric
relief)
•
Power exhaust
•
Differential dry-bulb sensor (EconoMi$er IV)
•
Outdoor enthalpy sensor
•
Differential enthalpy sensor
•
Electric heaters
•
Single point kits
•
Low ambient controls
•
Thermostat / Sensors
•
CO
sensor
2
•
Louvered hail guard
•
Phase monitor control
Refer to separate installation instructions for information on
installing these accessories.
42
IV wiring.
®
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