63
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.
Fig. 98 — V-Belt Force Label
BELT TENSION METHOD
Requires belt tension gauge that measures tension in belt
in units of lbs force.
Fig. 99 — Belt Drive Motor Mounting
Pre-Start and Start-Up
This completes the mechanical installation of the unit. Re-
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).
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)
Summary of Contents for WeatherMaster 50HC14
Page 4: ...4 Fig 2 Unit Dimensional Drawing 14 Size Unit ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing 14 Size Unit cont HORIZONTAL ECONOMIZER VERTICAL ECONOMIZER ...
Page 8: ...8 Fig 4 Roof Curb Details ...
Page 24: ...24 Fig 46 Typical Humidi MiZer Adaptive Dehumidification System Humidistat Wiring ...
Page 39: ...39 Fig 54 50HC14 Control Box Component Locations with ComfortLink Controls ...
Page 40: ...40 Fig 55 50HC14 ComfortLink Control Wiring Diagram ...
Page 41: ...41 Fig 56 50HC14 ComfortLink Power Wiring Diagram ...
Page 42: ...42 Fig 57 50HC14 ComfortLink with Humidi MiZer Power Wiring Diagram ...
Page 44: ...44 Fig 60 PremierLink Wiring Schematic ...
Page 45: ...45 Fig 61 PremierLink Wiring Schematic with Humidi MiZer System Option ...
Page 53: ...53 Fig 80 RTU Open System Control Wiring Diagram ...
Page 54: ...54 Fig 81 RTU Open System Control Wiring Diagram with Humidi MiZer System Option ...
Page 64: ......
Page 65: ......