Carrier WEATHERMASTER 50HJQ004-016 Product Data page 79

→ r. Control LEDs:
1) When the outdoor-air damper is capable
of providing free cooling, the "Free
Cool" LED shall illuminate.
2) The IAQ LED indicates when the mod-
ule is on the DCV mode.
3) The EXH LED indicates when the
exhaust fan contact is closed.
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s. Remote Minimum Position Control — A
field-installed accessory remote potentiome-
ter shall allow the outdoor-air damper to be
opened or closed beyond the minimum
position in the occupied mode for modified
ventilation.
4. 25% Manual Outdoor-Air Damper:
Manual damper package shall consist of
damper, birdscreen, and rainhood which can be
preset to admit up to 25% outdoor air for year-
round ventilation.
5. 50% 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. Admits up to 100%
outdoor air.
b. Damper shall close upon indoor fan shutoff.
c. Designed to close damper during loss of
power situations.
d. Equipped with 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. Electric Resistance Heaters:
a. Open wire nichrome elements with all nec-
essary safety operating controls.
b. UL listed and indicated on basic unit infor-
mative plate.
c. Available in multiples to match heating
requirements.
d. Single point kits available for each heater
when required.
* 9. Head Pressure Control Packages:
Package shall consist of solid-state control and
outdoor-coil temperature sensor to maintain
condensing temperature between 90 F and
110 F at outdoor ambient temperatures down
to –20 F by outdoor fan speed modulation or
outdoor fan cycling.
*10. Thermostat and Subbase:
Thermostat and subbase provide staged cooling
and heating automatic (or manual) changeover,
fan control, and indicator light.
11. Thru-The-Bottom Utility Connections:
Kit shall provide connectors to permit electrical
connections to be brought to the unit through
the basepan.
*12. Electronic Programmable Thermostat:
Unit shall be capable of using deluxe full-
featured electronic thermostat. Thermostat
shall use built-in compressor cycle delay control
for both heating and cooling duty. Thermostat
shall be capable of working with Carrier direct
digital controls.
13. 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$Recycler for
cantilever mounting off of the rooftop unit
with out the use of a slab or a roof curb.
b. A supplementary supply air fan kit to pro-
vide increased air movement into the 62AQ
unit.
c. A field-installed 460 v to 208/230 v trans-
former
Energy$Recycler is used with a 460-v roof-
top unit.
14. Power Exhaust Accessory for EconoMi$er IV or
EconoMi$er2:
Power exhaust shall be used in conjunction with
EconoMi$er IV or EconoMi$er2 to provide sys-
tem exhaust of up to 100% of return air (verti-
cal only). The power exhaust is a field-installed
accessory (separate vertical and horizontal
design).
NOTE: Horizontal power exhaust is intended to
mount in return ductwork.
As the outdoor-air damper opens and closes,
both propeller fans are energized and de-
energized through the EconoMi$er IV control-
ler. The set point is factory set at 100% of
outdoor-air, and is adjustable 0 to 100% to
meet specific job requirements. Available in
208/230-1-60 v or 460-3-60 v. An LED light
on the controller indicates when the power
exhaust is operating.
For the EconoMi$er2, the power exhaust shall
be controlled by the PremierLink or third party
controls.
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15. Outdoor Air Enthalpy Sensor (EconoMi$er IV
or EconoMi$er2):
The outdoor air enthalpy sensor shall be used
with the EconoMi$er IV or EconoMi$er2
905
to provide power when the
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