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Step 13 — Adjust Factory- -Installed Options
Smoke Detectors —
Smoke detector(s) will be connected at the Integrated
Staging Control (ISC) board, at terminals marked "Smoke
Shutdown". Remove jumper JMP 3 when ready to
energize unit.
Step 14 — Install Accessories
Available field- - installed accessories include:
Roof Curb (must be installed before unit)
Thru- - base connection kit (must be installed before unit
is set on curb)
EconoMi$er
R
X (with control)
Power Exhaust
Outdoor enthalpy sensor
Differential enthalpy sensor
CO
sensor
2
Temperature and Humidity sensors
Louvered hail guard
Phase monitor control
Refer to separate installation instructions for information
on installing these accessories. See Price Pages for a
complete list of field- - installed accessories.
Step 15 — Check Belt Tension
Measure the belt span length as shown in Fig. 67.
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. 67). 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.
Fig. 67 - - V- - Belt Force Label
65
C160146
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