Pre-Start And Start-Up - Carrier WeatherMaster 50HC14 Installation Instructions Manual

Adjust belt tension by loosing the motor mounting plate
front bolts and rear bolt (see Fig. 99) and slide the plate to-
wards the fan (to reduce tension) or away from the fan (to in-
crease tension). Ensure the blower shaft and motor shaft are
parallel to each other (pulleys aligned). Tighten all bolts se-
curely when finished.
BELT DEFLECTION FORCE (LBS)
BELT SMALLEST
UNNOTCHED
CROSS SHEAVE
SECTION DIAMETER
USED
3.0-3.6 3.7
A, AX 3.8-4.8 4.5
5.0-7.0 5.4
3.4-4.2
B, BX 4.4-5.6 5.3
5.8-8.6 6.3
Table 1
BELT CONDITION TENSION FORCE IN BELT (LBS)
New
Used
Table 2
Fig. 98 — V-Belt Force Label
NOTCHED BELTS
BELTS
NEW USED NEW
5.5 4.1
6.8 5.0
8.0 5.7
— — 4.9
7.9 7.1 10.5
9.4 8.5 12.6
100
80
BELT TENSION METHOD
Requires belt tension gauge that measures tension in belt
in units of lbs force.
MOUNTING
BOLTS (4)
Fig. 99 — Belt Drive Motor Mounting
6.1
7.4

Pre-Start and Start-Up

8.4
This completes the mechanical installation of the unit. Re-
7.2
fer to the unit's Service Manual for detailed Pre-Start and
Start-Up instructions. Download the latest versions from
HVAC Partners (www.hvacpartners.com).
63
BLOWER PULLEY
V-BELT
MOTOR
PULLEY
MOTOR
MOTOR MOUNTING
PLATE