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62
Fig. 97 — EconoMi$er
®
IV Wiring
Step 11 — Adjust Factory-Installed Options
SMOKE DETECTORS
Smoke detector(s) will be connected at the Controls Con-
nections Board, at terminals marked “Smoke Shutdown.” Cut
jumper JMP 3 when ready to energize unit.
ECONOMI$ER IV OCCUPANCY SWITCH
Refer to Fig. 97 for general EconoMi$er IV wiring. Exter-
nal occupancy control is managed through a connection on
the Controls Connections Board.
If external occupancy control is desired, connect a time
clock or remotely controlled switch (closed for Occupied,
open for Unoccupied sequence) at terminals marked OCCU-
PANCY. Cut jumper JMP 2 to complete the installation.
Step 12 — Install Accessories
Available accessories include:
• Roof curb (must be installed before unit)
• Thru-base connection kit (must be installed before unit is
set on curb)
• Manual outside air damper
• Two-position motorized outside air damper
• EconoMi$er IV (with control and integrated barometric
relief)
• EconoMi$er2 (without control/for external signal and in-
tegrated barometric relief)
• Barometric relief
• Power exhaust
• Differential dry-bulb sensor (EconoMi$er IV)
• Outdoor enthalpy sensor
• Differential enthalpy sensor
• Time Guard II compressor anti-cycle control
• Outdoor coil protector grille
• Head pressure control
• Programmable setback thermostat
• Electrical/mechanical thermostat and subbase
• Thermidistat device
• Humidistat
• Thermostat / sensors
• CO
2
sensor
• DDC interface (PremierLink controller)
• Louvered hail guard
• Phase monitor control
Refer to separate installation instructions for information
on installing these accessories.
Step 13 — Check Belt Tension
Measure the belt span length as shown in Fig. 98. Calcu-
late the required deflection by multiplying the belt span
length by
1
/
64
. For example, if the belt span length is 32 inch-
es: 32 x
1
/
64
=
1
/
2
-in. deflection.
BELT FORCE — DEFLECTION METHOD
Check the belt tension with a spring-force belt force de-
flection gauge (available from drive belt manufacturer).
1. Place a straightedge along the belt between the two pul-
leys. Measure the distance between the motor shaft and
the blower shaft.
2. Set the tension gauge to the desired tension (see Table 1
in Fig. 98). Place the large O-ring at that point.
3. Press the tension checker downward on the belt until the
large O-ring is at the bottom of the straightedge.
4. Adjust the belt tension as needed.
Economizer
2 Position Damper
Unit Without Economizer or
2 Position Damper
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: ......