Bryant 580J*16D Series, Installation Instructions Manual

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61
Fig. 92 — EconoMi$er
®
IV Wiring
Step 13 — Adjust Factory- Installed Options
SMOKE DETECTORS — Smoke detector(s) will be connect-
ed at the Controls Connections Board, at terminals marked
“Smoke Shutdown”. Cut jumper JMP 3 when ready to energize
unit.
ECONOMI$ER IV OCCUPANCY SWITCH — Refer to
Fig. 92 for general EconoMi$er IV wiring. External occupancy
control is managed through a connection on the Controls Connec-
tions Board.
If external occupancy control is desired, connect a time clock
or remotely controlled switch (closed for Occupied, open for Un-
occupied sequence) at terminals marked OCCUPANCY. Cut
jumper JMP 2 to complete the installation.
Step 14 — Install Accessories
Available accessories include:
• Roof curb
• Thru-base connection kit (must be installed before unit is
set on curb)
• Manual outside air damper
• Two-position motorized outside air damper
• EconoMi$er IV (with control)
• EconoMi$er 2 (without control/for external signal)
• Power exhaust
• Differential dry-bulb sensor (EconoMi$er IV)
• Outdoor enthalpy sensor
• Differential enthalpy sensor
• CO
2
sensor
• Louvered hail guard
• Phase monitor control
Refer to separate installation instructions for information on in-
stalling these accessories.
Step 15 — Check Belt Tension —
Measure the belt span
length as shown in Fig. 93. 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
(available from drive belt manufacturer).
1. Place a straightedge along the belt between the two pul-
leys. 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. 93). 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.
Adjust belt tension by loosing the motor mounting plate front
bolts and rear bolt (see Fig. 94) and slide the plate towards the fan
(to reduce tension) or away from the fan (to increase tension). En-
sure the blower shaft and motor shaft are parallel to each other
(pulleys aligned). Tighten all bolts securely when finished.