Smoke Detector Test Magnet; Additional Application Data; Step 11 - Adjust Factory- -Installed Options; Step 12 - Install Accessories - Bryant 548J***D Series Installation Instructions Manual

the tube, facing into the bottom return duct opening for
vertical unit's and on the side of the tube, facing the
unit's end panel for horizontal units.
4. Insert the sampling tube into the return air sensor
module until the tube snaps into position.
5. Replace end panel or outside air hood.
Smoke Detector Test Magnet —
Locate the magnet; it is shipped in the control box area.
Additional Application Data —
Refer to 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 11 — Adjust Factory- -Installed Options
Smoke Detectors —
Smoke detector(s) will be connected at the Controls
Connections Board, at
Shutdown". Remove jumper JMP 3 when ready to
energize unit.
EconoMi$er R IV Occupancy Switch —
Refer to Fig. 66 for general EconoMi$er IV wiring.
External occupancy 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 on CTB. Remove or cut jumper JMP 2 to
complete the installation.
Step 12 — Install Accessories
Available accessories include:
Roof Curb
terminals marked "Smoke
Economizer
Fig. 66 - - EconoMi$er IV Wiring
Thru- - base connection kit (must be installed before unit
is set on curb)
Manual outside air damper
Two- - Position motorized outside air damper
EconoMi$er IV (with control and integrated barometric
relief)
EconoMi$er2 (without control/for external signal and
integrated barometric relief)
Power Exhaust
Differential dry- - bulb sensor (EconoMi$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
Winter Start kit
Refer to separate installation instructions for information
on installing these accessories.
Step 13 — Check Belt Tension
Measure the belt span length as shown in Fig. 67.
Calculate the required deflection by multiplying the belt
1
span length by / . For example, if the belt span length is
64
1 1
32 inches: 32 x / = /
64 2
Belt Force - - Deflection Method - -
Check the belt tension with a spring- - force belt force
deflection gauge.
1. Place a straightedge along the belt between the two
pulleys. Measure the distance between the motor shaft
and the blower shaft.
2 Position Damper
53
inch deflection.
Unit Without Economizer or
2 Position Damper
C10183