51
Step 13 — Check Belt Tension
Measure the belt span length as shown in Fig. 71.
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. 71). 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. 72) and sliding the plate
towards the fan (to reduce tension) or away from the fan
(to increase tension). Ensure the blower shaft and motor
shaft are parallel to each other (pulleys aligned). Tighten
all bolts securely when finished.
C160146
Fig. 71 −
V−Belt Force Label
50HCQ
Summary of Contents for WeatherMaster 50HCQ
Page 4: ...4 C160133 Fig 2 Unit Dimensional Drawing 07 08 Size Units 50HCQ...
Page 5: ...5 C160134 Fig 2 Unit Dimensional Drawing 07 08 Size Unit cont 50HCQ...
Page 6: ...6 C10588 Fig 3 Unit Dimensional Drawing 09 Size Units 50HCQ...
Page 7: ...7 C10589 Fig 3 Unit Dimensional Drawing 09 Size Unit cont 50HCQ...
Page 26: ...26 C160124 Fig 39 Typical PremierLinkt Control Wiring Diagram 50HCQ...
Page 35: ...35 C160125 Fig 56 Typical RTU Open Controller Wiring Diagram 50HCQ...
Page 53: ...53 50HCQ...