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 (SAVt)
with Va riable Frequency Drive 48..................
Multi--Speed VFD Display Kit
(Field--Installed Accessory) 49....................
Connect ing the Keypad to the VFD 50.............
Program the VFD for 3 Discrete Indoor Fan Speeds 51.
Smoke Detect ors 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 CONSIDERAT I ONS
Impro p er installatio n , adjustmen t, alteration, s er vice,
maintenan ce, or us e can caus e ex plo s ion , 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 wh en modify ing this
product. Refer to the individual instructions packaged with
the kits or access o ries wh en 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,
Nationa l Electrical Code (NEC); in Canada, CSA C22.1)
for special requirem ents.
It is importa nt 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 inj ury 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 t o fol low this warning could cause personal
injury or de ath.
Before performing service or maintenance operations
on unit, turn off ma in power switch to unit and i nstall
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 t o fol low this warning could cause personal
injury, death and/or equipment damage.
Puronr (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 t o fol low this warning could cause personal
injury or de ath.
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 re frigerants and oils.
!
WARNING
To Next Page
Loading...
