Bryant 548J*14D Series, Руководство по установке

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52
Economizer 2 Position Damper
Unit Without Economizer or
2 Position Damper
C08631
Fig. 68 -- EconoMi$er
R
IV Wiring
Step 11 — Adjust Factory--Installed Options
Smoke Detectors —
Smoke detector(s) will be connected at the Central Terminal
Board (CTB), at terminals marked “Smoke Shutdown”.
Remove jumper JMP 3 when ready to energize unit.
EconoMi$er IV Occupancy Switch —
Refer to Fig. 68 for general EconoMi$er IV wiring.
External occupancy control is managed through a
connection on the Central Terminal Board.
If external occupancy control is desired, connect a time
clock or remotely controlled switch (closed for Occupied,
open for Unoccupied sequence) at terminals marked
OCCUPANCY on CTB. Remove or cut jumper JMP 2 to
complete the installation.
Step 12 — Install Accessories
Available accessories include:
Roof curb
Thru--base connection kit (must be installed before unit
is set on curb)
Manual outside air damper
Two--position motorized outside air damper
EconoMi$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
Time Guard II compressor anti--cycle control
Outdoor coil protector grille
Head pressure control
Programmable setback thermostat
Electro--mechanical thermostat and subbase
Electric heaters
Single point kits
Thermostat / sensors
CO
2
sensor
Louvered hail guard
Phase monitor control
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. 69.
Calculate the required deflection by multiplying the belt
span length by
1
/
64
. For example, if the belt span length is
32 inches: 32 x
1
/
64
=
1
/
2
inch deflection.
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. Set the tension gauge to the desired tension (see Table 1
in Fig. 69). Place the large O--ring at that point.
3. Press the tension checker downward on the belt until
the large O--ring is at the bottom of the straightedge.
4. Adjust the belt tension as needed.