User's Manual

1068152-YTG-L-0815
184 Johnson Controls Unitary Products
c. Damper blades shall be galvanized steel with composite gears. Plastic or composite blades on intake or
return shall not be acceptable.
d. Shall include all hardware and controls to provide free cooling with outdoor air when temperature and/or
humidity are below set-points.
e. Shall be equipped with gear driven dampers for both the outdoor ventilation air and the return air for
positive air stream control.
f. Standard models shall be equipped with low- leakage dampers, not to exceed 2% leakage at 1 in. wg pres-
sure differential. Economizers will come with Actuator and module that is tied to Simplicity SE:
(1.) Combined minimum and DCV maximum damper position potentiometers with compressor staging re-
lay.
(2.) Functions with solid state analog enthalpy or dry bulb changeover control sensing.
(3.) Contain LED indicates for:
when free cooling is available
when module is in DCV mode when exhaust
fan contact is closed
4. Two- Position Damper
a. Damper shall be a Two- Position Damper. Damper travel shall be from the full closed position to the field
adjustable %- open setpoint.
b. Damper shall include adjustable damper travel from 25% to 100% (full open).
c. Damper shall include single or dual blade, gear driven dampers and actuator motor.
d. Actuator shall be direct coupled to damper gear. No linkage arms or control rods shall be acceptable. e.
Damper will admit up to 100% outdoor air for applicable rooftop units.
f. Damper shall close upon indoor (evaporator) fan shutoff and/or loss of power.
g. The damper actuator shall plug into the rooftop unit’s wiring harness plug. No hard wiring shall be required.
h. Outside air hood shall include aluminum water entrainment filter.
5. Manual damper
a. Manual damper package shall consist of damper, air inlet screen, and rain hood which can be preset to admit
up to 25 or 50% outdoor air for year round ventilation.
6. Condenser Coil Hail Guard Assembly (Factory and Field installed on all models):
a. Shall protect against damage from hail.
b. Shall be of louvered style.
7. Unit- Mounted, Non- Fused Disconnect Switch: (Verify on the unit nameplate that the disconnect is properly sized
for the application. Units with field installed electric heat may exceed the factory installed disconnect amperage
rating.)
a. Switch shall be factory- installed, internally mounted.
b. National Electric Code (NEC) and UL approved non- fused switch shall provide unit power shutoff.
c. Shall be accessible from outside the unit.
d. Shall provide local shutdown and lockout capability.
8. Thru- the- Base Connectors:
a. Kits shall provide connectors to permit gas and electrical connections to be brought to the unit through the unit
base-pan.
b. Minimum of four connection locations per unit.
9. Propeller Power Exhaust:
a. Power exhaust shall be used in conjunction with an integrated economizer.
b. Independent modules for vertical or horizontal return configurations shall be available. c. Horizontal power
exhaust is shall be mounted in return ductwork.
d. Power exhaust shall be controlled by economizer controller operation. Exhaust fans shall be energized when
dampers open past the 0- 100% adjustable setpoint on the economizer control.
10. Roof Curbs (Vertical):