Product data

120
g. Dry bulb outdoor-air temperature sensor
shall be provided as standard. Enthalpy, dif-
ferential temperature, and differential
enthalpy control shall be provided as an
option.
h. Durablade economizer is a guillotine-style
damper, and the EconoMi$er is a gear-
driven parallel blade design.
i. EconoMi$er shall provide control of internal
building pressure through its accessory two-
stage power exhaust function.
j. EconoMi$er shall be capable of control
from a 4 to 20 mA signal.
5. Manual Outdoor-Air Damper:
Manual damper package shall consist of
damper, birdscreen, and rainhood which can be
preset to admit up to 50% outdoor air for year
round ventilation.
* 6. 100% Two-Position Damper:
a. Two-position damper package shall include
single blade damper and motor. Admits up
to 100% outdoor air.
b. Damper shall close upon indoor (evaporator)
fan shutoff.
c. Designed to close damper during loss of
power situations.
d. Equipped with 15% barometric relief
damper.
* 7. 25% Two-Position Damper:
a. Two-position damper package shall include
single blade damper and motor. Admits up
to 25% outdoor air.
b. Damper shall close upon indoor fan shutoff.
* 8. Head Pressure Control Package:
Consists of solid-state control and condenser-
coil temperature sensor to maintain condensing
temperature between 90 F and 110 F at out-
door ambient temperatures down to –20 F by
condenser-fan speed modulation or condenser-
fan cycling and wind baffles.
9. Electric Resistance Heaters:
a. Open wire nichrome elements with all nec-
essary safety operating controls.
b. UL listed and indicated on basic unit infor-
mation plate.
c. Available in multiples to match heating
requirements.
d. Single point kits available for each heater
when required.
*10. Electronic Programmable Thermostat:
Capable of using deluxe full-featured electronic
thermostat. Shall use built-in compressor cycle
delay control for both heating and cooling duty.
Capable of working with Carrier direct digital
controls.
*11. Thermostat and Subbase:
Provides staged cooling and heating automatic
(or manual) changeover, fan control, and indica-
tor light.
*12. Condenser Coil Hail Guard Assembly:
Hail guard shall protect against damage from
hail and flying debris.
13. Unit-Mounted, Non-Fused Disconnect Switch:
Shall be factory-installed, internally mounted.
NEC and UL approved non-fused switch shall
provide unit power shutoff. Shall be accessible
from outside the unit and shall provide power
off lockout capability.
14. Convenience Outlet:
Shall be factory-installed and internally
mounted with easily accessible 115-v female
receptacle. Shall include 15 amp GFI receptacle
with independent fuse protection. Voltage
required to operate convenience outlet shall be
provided by a factory-installed step-down trans-
former. Shall be accessible from outside the
unit.
15. Outdoor Coil Grille:
The grille protects the outdoor coil from dam-
age by large objects without increasing unit
clearances.
16. Compressor Cycle Delay:
Unit shall be prevented from restarting for min-
imum of 5 min. after shutdown.
17. Thru-the-Bottom Utility Connectors:
Kit shall provide connectors to permit electrical
connections to be brought to the unit through
the basepan.
18. Fan/Filter Status Switch:
Provides status of indoor (evaporator) fan (ON/
OFF) or filter (CLEAN/DIRTY). Status shall be
displayed over communication bus when used
with direct digital controls or with an indicator
light at the thermostat.
19. Energy$Recycler:
The package shall be an outdoor rooftop or sur-
face mounted, electronically controlled, air-to-
air heat pump unit utilizing a hermetic com-
pressor for cooling and heating duty.
The Energy$Recycler shall recover energy from
building exhaust air and pre-condition ventila-
tion air to allow higher ventilation requirements
and minimizing energy cost.
This option shall be available with the following:
a. A mounting kit for the Energy$Recycler for
cantilever mounting off of the rooftop unit
with out the use of a slab or a roof curb.
b. A supplementary supply air fan kit to pro-
vide increased air movement into the 62AQ
unit.
Guide specifications — 50HJQ004-012 (cont)
50TFQ004-01250HJQ004-012