Belt Tension Method; Pre-Start And Start-Up - Carrier WeatherMaster 48HC14 Installation Instructions Manual

the blower shaft and motor shaft are parallel to each other (pulleys
aligned). Tighten all bolts securely when finished.
BELT DEFLECTION FORCE (LBS)
BELT SMALLEST
CROSS SHEAVE
SECTION DIAMETER
USED
3.0-3.6
A, AX 3.8-4.8
5.0-7.0
3.4-4.2
B, BX 4.4-5.6
5.8-8.6
BELT CONDITION TENSION FORCE IN BELT (LBS)
New
Used
Fig. 68 — V-Belt Force Label
UNNOTCHED
NOTCHED BELTS
BELTS
NEW USED NEW
3.7 5.5 4.1
4.5 6.8 5.0
5.4 8.0 5.7
— — 4.9
5.3 7.9 7.1 10.5
6.3 9.4 8.5 12.6
Table 1
100
80
Table 2

BELT TENSION METHOD

Requires belt tension gage that measures tension in belt in units of
lbs force.
MOUNTING
6.1
BOLTS (4)
7.4
8.4
Fig. 69 — Belt Drive Motor Mounting
7.2

Pre-Start and Start-Up

This completes the mechanical installation of the unit. Refer to
the unit's Service Manual for detailed Pre-Start and Start-Up
instructions. Download the latest versions from HVAC Part-
ners (www.hvacpartners.com).
49
BLOWER PULLEY
V-BELT
MOTOR
PULLEY
MOTOR
MOTOR MOUNTING
PLATE