Carrier 50HJQ004-016 Product Data page 142

condenser-fan speed modulation or condenser-fan
cycling and wind baffles.
i. Electric Resistance Heaters:
(1.) Open wire nichrome elements with all necessary
safety operating controls.
(2.) UL listed and indicated on basic unit information
plate.
(3.) Available in multiples
requirements.
(4.) Single point kits available for each heater when
required.
j. 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.
k. Thermostat and Subbase*:
Thermostat and subbase shall provide staged cooling and
heating automatic (or manual) changeover, fan control,
and indicator light.
l. Unit-Mounted, Non-Fused Disconnect Switch:
Switch shall be factory-installed, internally mounted.
NEC and UL approved non-fused switch shall provide
unit power shutoff. Switch shall be accessible from
outside the unit and shall provide power off lockout
capability.
m. Convenience Outlet:
Outlet shall be factory-installed and internally mounted
with easily accessible 115-v female receptacle. Outlet
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
transformer. Outlet shall be accessible from outside the
unit.
n. Compressor Cycle Delay:
Unit shall be prevented from restarting for minimum of
5 min. after shutdown.
o. Fan/Filter Status Switch:
Switch shall provide 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.
p. Power Exhaust:
Package shall include an exhaust (propeller style) fan,
Hp 208-230, 460 v (factory-wired for 460 v) direct drive
motor, and damper for vertical flow units with
economizer to control over-pressurization of building.
Power Exhaust package must be field-installed in
return-air ductwork when used with optional side return
connections.
q. 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 device to provide single
enthalpy control. When used in conjunction with a return
air enthalpy sensor, the controller will provide differential
enthalpy control. The sensor allows the controller to
determine if outside air is suitable for free cooling.
r. Return Air Enthalpy Sensor (EconoMi$er IV or
EconoMi$er2):
The return air enthalpy sensor shall be used with the
EconoMi$er IV or EconoMi$er2 device. When used in
conjunction with an outdoor air enthalpy sensor, the
to match heating
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/
2
142
EconoMi$er IV or EconoMi$er2 device will provide
differential enthalpy control.
s. Return Air Temperature Sensor (EconoMi$er IV or
EconoMi$er2):
The return air temperature sensor shall be used with the
EconoMi$er IV or EconoMi$er2 device. When used in
conjunction with the standard outdoor air temperature
sensor, the EconoMi$er IV or EconoMi$er2 device will
provide differential temperature control.
t. Indoor Air Quality (CO ) Sensor (EconoMi$er2):
2
(1.) Shall have the ability to provide demand ventilation
indoor air quality (IAQ) control through the
economizer with an IAQ sensor.
(2.) The IAQ sensor shall be available in duct mount, wall
mount, and wall mount with LED display. The set
point shall have adjustment capability.
u. Indoor Air Quality (CO ) Room Sensor (EconoMi$er
2
IV):
Sensor shall have the ability to provide demand
ventilation control through the EconoMi$er IV. The IAQ
sensor shall be wall mounted with an LED display in parts
per million. The set point shall have adjustment
capability.
v. Return Air CO Sensor (EconoMi$er IV):
2
Sensor shall have the ability to provide demand
ventilation control through the EconoMi$er IV. The IAQ
sensor shall be duct mounted. The set point shall have
adjustment capability.
w. Ultra-Violet Germicidal Lamps:
Ultra-violet germicidal lamps are designed to eliminate
odor causing mold and fungus that may develop in the
wet area of the indoor section of the unit. The high output,
low temperature germicidal lamps are field installed in
the indoor section of the unit, aimed at the indoor coil and
condensate pan. The short wavelength ultra-violet light
inhibits and kills mold, fungus and microbial growth. The
lamps have an output rating at 45_F in 400 fpm airflow
2
of 120 microwatts/cm at 1 meter.
x. Hinged Panel Option:
Hinged panel option provide hinged access panels for the
filter, compressor, indoor fan, and control box areas.
Filter hinged panels permit toolless entry for changing
filters. Each hinged panel is permanently attached to the
rooftop unit.
y. Emergency Heat Control Package:
When mechanical heating is locked out, auxiliary heat
shall be activated when necessary.
z. Glycol Coil:
Coil shall be 2-row copper tube (
aluminum plate fins (15 fins/in.) and 1.625 in. OD copper
headers. Input and output connections shall be 1.625 in.
ODM copper stubs for sweat connection. Coil shall be
furnished with suitable support rails, end plates, and
hardware for ready field installation in the heater
compartment.
aa. Winter Start Time Delay:
Used in conjunction with the accessory low ambient kit
or head pressure control device, the kit permits operation
in cooling at lower outdoor temperatures. See price pages
for more information.
ab. Alternate Drive:
Alternate drive shall provide higher static drive capability
to enhance indoor fan performance rpm range.
ac. Stainless Steel Condensate Pan:
Stainless steel condensate pans shall be available for
condensate collection.
1
/ -in. OD) with
2