Belt Tension Method; Evaporator Coil Metering Devices; Pre-Start And Start-Up - Carrier 50KC04 Installation Instructions Manual

BELT DEFLECTION FORCE - SEE TABLE 1
SET
SCREW
TORQUE ALL SHEAVE SET SCREWS TO 110-130 in. lbs
TABLE 1
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
TABLE 2
BELT CONDITION TENSION FORCE IN BELT (LBS)
New
Used
Fig. 59 — V-Belt Force Label

BELT TENSION METHOD

Requires belt tension gage that measures tension in belt in units of
lbs force.
DEFLECTION = BELT SPAN
64
STRAIGHT
EDGE
SET
SCREW
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
100
80
MOUNTING
BOLTS (4)
6.1
7.4 Fig. 60 — Belt Drive Motor Mounting
8.4

Evaporator Coil Metering Devices

7.2
The metering devices are multiple fixed-bore devices (Acutrol™)
swedged into the horizontal outlet tubes from the liquid header, lo-
cated at the entrance to each evaporator coil circuit path. See
Fig. 61 and 62 for units with standard metering devices and
Fig. 63 for units with Humidi-MiZer
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 instruc-
tions. Download the latest versions from HVAC Partners
(www.hvacpartners.com).
44
BLOWER PULLEY
V-BELT
MOTOR
PULLEY
MOTOR
MOTOR MOUNTING
PLATE
metering devices. These are
®