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48
Adjust belt tension by loosing the motor mounting plate
front bolts and rear bolt (see Fig. 67) 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 TENSION METHOD —
Requires belt tension
gauge that measures tension in belt in units of lbs force.
Fig. 66 — V-Belt Force Label
Fig. 67 — Belt Drive Motor Mounting
Pre-Start and Start-Up —
This completes the mechani-
cal 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)
Содержание 580J*04A
Страница 4: ...4 Fig 2 Unit Dimensional Drawing ...
Страница 5: ...5 Fig 2 Unit Dimensional Drawing cont ...
Страница 21: ...21 Fig 34 580J Size 07 Unit with Perfect Humidity Dehumidification System Humidistat Wiring ...
Страница 37: ...37 Fig 43 Typical RTU Open System Control Wiring Diagram ...
Страница 38: ...38 Fig 44 Typical RTU Open System Control Wiring Diagram with Perfect Humidity ...
Страница 49: ......