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2
Demand Controlled Ventilation
37
. . . . . . . . . . . . . .
Economizer Occupancy Control
38
. . . . . . . . . . . . . .
Hardware
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuators
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Air Temperature Sensor
39
. . . . . . . . . . . . . .
Outside Air Temperature Sensor
39
. . . . . . . . . . . . .
Enthalpy Control Sensor Configuration
39
. . . . . . . .
Operating Sequences
40
. . . . . . . . . . . . . . . . . . . . . . . .
Staged Air Volume (3--Speed) Fan Motor
40
. . . . . .
W7220 Economizer Control
40
. . . . . . . . . . . . . . . . .
Base Unit Controls
40
. . . . . . . . . . . . . . . . . . . . . . . .
Cooling, Unit With EconoMi$er
R
X
Without CO
2
Sensor
40
. . . . . . . . . . . . . . . . . . . . . . .
Heating With EconoMi$er X
42
. . . . . . . . . . . . . . . . .
Demand Controlled Ventilation
43
. . . . . . . . . . . . . .
Setup and Configuration
43
. . . . . . . . . . . . . . . . . . . . .
Initial Menu Display
43
. . . . . . . . . . . . . . . . . . . . . . .
Time--out and Screensaver
43
. . . . . . . . . . . . . . . . . .
Checkout
43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Status
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration of Sensors
44
. . . . . . . . . . . . . . . . . . . . . .
Resetting All Defaults
44
. . . . . . . . . . . . . . . . . . . . . .
Troubleshooting
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Up Delay
44
. . . . . . . . . . . . . . . . . . . . . . . . . .
Power Loss (Outage or Brownout)
44
. . . . . . . . . . . .
Alarms
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clearing Alarms
44
. . . . . . . . . . . . . . . . . . . . . . . . . .
Control Set Point and Configuration Log
46
. . . . . . . .
Staged Air Volume (SAV
t
)
with Variable Frequency Drive
48
. . . . . . . . . . . . . . . . . .
Multi--Speed VFD Display Kit
(Field--Installed Accessory)
49
. . . . . . . . . . . . . . . . . . . .
Connecting the Keypad to the VFD
50
. . . . . . . . . . . . .
Program the VFD for 3 Discrete Indoor Fan Speeds
51
.
Smoke Detectors
60
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 11 -- Adjust Factory--Installed Options
61
. . . . . . . .
Step 12 -- Install Accessories
61
. . . . . . . . . . . . . . . . . . .
Step 13 -- Check Belt Tension
61
. . . . . . . . . . . . . . . . . . .
UNIT START UP CHECKLIST
63
. . . . . . . . . . . . . . . . . .
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal injury
or property damage. Consult a qualified installer, service
agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use
factory--authorized kits or accessories when modifying this
product. Refer to the individual instructions packaged with
the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA 70,
National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important to recognize safety information. This is the
safety--alert symbol
. When you see this symbol on the
unit and in instructions or manuals, be alert to the
potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety--alert symbol. DANGER identifies the most serious
hazards which
will
result in severe personal injury or
death. WARNING signifies hazards which
could
result in
personal injury or death. CAUTION is used to identify
unsafe practices, which
may
result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which
will
result in enhanced
installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, turn off main power switch to unit and install
lock(s) and lockout tag(s). Ensure electrical service to
rooftop unit agrees with voltage and amperage listed
on the unit rating plate. Unit may have more than one
power switch.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puron
r
(R--410A) refrigerant systems operate at
higher pressures than standard R--22 systems. Do not
use R--22 service equipment or components on Puron
refrigerant equipment.
!
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
!
WARNING
Summary of Contents for WeatherExpert 50LC
Page 4: ...4 a50 9584 Fig 2 Unit Dimensional Drawing ...
Page 5: ...5 a50 9585 Fig 2 Unit Dimensional Drawing cont ...
Page 14: ...14 a50 9586 Fig 17 50LC 07 Electro mechanical Control Wiring Diagram ...
Page 15: ...15 a50 9592 Fig 18 50LC 07 RTU Open Control Wiring Diagram ...
Page 16: ...16 a50 9587 Fig 19 50LC 07 SystemVut Control Wiring Diagram ...