40
Fig. 53 — V-Belt Force Label
BELT TENSION METHOD
Requires belt tension gauge that measures tension in belt in
units of lbs force.
Fig. 54 — Belt Drive Motor Mounting
Evaporator Coil Metering Devices
The metering devices are multiple fixed-bore devices (Acu-
trol™) swedged into the horizontal outlet tubes from the liq-
uid header, located at the entrance to each evaporator coil cir-
cuit path. See Fig. 55-56 for units with standard metering de-
vices and Fig. 57 for units with Humidi-MiZer
®
metering
devices. These are non-adjustable. Service requires replacing
the entire liquid header assembly. For more information, see
the 50KC04-06 Service and Maintenance Instructions.
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
Partners (www.hvacpartners.com).
Table 1
Table 2
BELT
CROSS
SECTION
SMALLEST
SHEAVE
DIAMETER
BELT DEFLECTION FORCE (LBS)
UNNOTCHED
BELTS
NOTCHED BELTS
USED NEW USED NEW
A, AX
3.0-3.6 3.7 5.5 4.1 6.1
3.8-4.8 4.5 6.8 5.0 7.4
5.0-7.0 5.4 8.0 5.7 8.4
B, BX
3.4-4.2 — — 4.9 7.2
4.4-5.6 5.3 7.9 7.1 10.5
5.8-8.6 6.3 9.4 8.5 12.6
BELT CONDITION TENSION FORCE IN BELT (LBS)
New 100
Used 80
BLOWER PULLEY
V-BELT
MOTOR
PULLEY
MOTOR
MOTOR MOUNTING
PLATE
MOUNTING
BOLTS (4)
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