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3
Low voltage wiring connections
are easily made due to the large
terminal board which is located for quick, convenient access.
In addition, color-coded wires permit easy tracing and
diagnostics.
Proven compressor reliability
Design techniques feature computer-programmed balance
between compressor, condenser, and evaporator. Carrier-specified
hermetic compressors are equipped with compressor overcurrent
and overtemperature protection to ensure dependability.
All units have Carrier’s exclusive Acutrol
™
fixed orifice
metering device which precisely controls refrigerant flow,
preventing slugging and flood-back, while maintaining optimum
unit performance. Refrigerant filter driers are standard.
Standard low ambient cooling operation to 25
_
F; optional head
pressure control kit available for outdoor ambient conditions to
–20
_
F.
Integrated economizers and outdoor-air dampers
Available as options or accessories, economizers and manual
outdoor-air dampers introduce outdoor air which mixes with the
conditioned air, improving indoor air quality and often reducing
energy consumption.
During a first stage call for cooling, if the outdoor air temperature
is below the economizer control changeover set point, the
mixed-air sensor modulates the economizer outdoor air damper
open to take advantage of free cooling provided by the outside
air. When second-stage cooling is called for, the compressor is
energized in addition to the economizer. If the outdoor air
temperature is above the changeover set point, the first stage of
compression is activated and the economizer damper stays at
minimum position.
Accessory upgrade kits allow for control by differential dry-bulb
temperature (outdoor vs return), outdoor air enthalpy changeover,
or more precise differential enthalpy control.
Units can be equipped with different economizer options to meet
specific
controls
applications.
The
factory-installed
or
field-installed EconoMi$er IV and EconoMi$er2 are available.
The EconoMi$er IV is used with the standard rooftop unit
controls and includes an industry standard, stand-alone,
solid-state control. The control can be used with a CO
2
sensor for
DCV (demand control ventilation) operation. For direct digital
control (DDC) applications, the EconoMi$er2 can be operated
using PremierLink
™
controls or a third party controller. The
Econo-Mi$er2 includes 4 to 20 mA actuator capability for
demand control ventilation applications.
All economizers incorporate a parallel blade, gear driven damper
system for efficient air mixing and reliable control. In addition,
the standard damper actuator includes a spring return to provide
reliable closure on power loss. The economizers for sizes
004-012 are equipped with up to 100% barometric relief
capability for high outdoor airflow operations. Economizers for
unit sizes 004-012 are available, factory-installed, for vertical
return only. Economizers for unit sizes 014-016 are compatible
for vertical or horizontal return. An optional field-installed
barometric relief package is available for 014 and 016 size units.
In addition, single-stage power exhaust is available as a
field-installed accessory for EconoMi$er IV to help maintain
proper building pressure.
For units without economizer, year-round ventilation is enhanced
by a manual outdoor-air damper. On size 004-012 units, a 25% or
50% manual damper is available as a field-installed accessory.
Unit sizes 014 and 016 are equipped with a manual 25% damper.
Service options
Servicing a rooftop unit has never been easier with the new
factory-installed service options for these rooftop units. These
options include the following:
S
Hinged
access
panels
are
provided
for
the
filter/indoor-fan motor, compressors, indoor fan, and
control box areas. Quick access to major components is
accomplished by simply unlatching and swinging open
the various panels. Each hinged panel is permanently
mounted to the unit, thereby eliminating the concern of
a dropped or wind-blown panel puncturing delicate
roof materials. The 4 extended access panels are also
equipped with ‘‘tie back’’ retaining devices to hold the
door in the open position while servicing the unit.
S
An external, covered, 115-v Ground Fault Interrupt
(GFI) receptacle is provided as a convenient power
source for drills, lights, refrigerant recovery units, or
other electrical service tools. Simply connect the outlet
to a field-supplied and properly fused branch circuit
power supply.
S
An integral non-fused disconnect switch within the
rooftop unit reduces installation time, labor and
material costs. Safety is assured by an interlock which
prevents access to the control box unless the switch is
in the OFF position.
In addition, the externally
mounted handle incorporates power lockout capability
to further protect service personnel.
Carrier PremierLink
™
controls add reliability,
efficiency, and simplification
The PremierLink direct digital controls can be ordered as a
factory-installed option or as a field-installed accessory. Designed
and manufactured exclusively by Carrier, the controls can be used
to actively monitor and control all modes of operation, as well as
monitor the following diagnostics and features: unit number, zone
temperature, zone set point, zone humidity set point, discharge air
temperatures, fan status, stages of heating, stages of cooling,
damper position, outdoor-air temperature, outdoor humidity
level, filter status, fire shutdown status, IAQ (indoor air quality)
set point, enthalpy status, differential enthalpy status, heat/cool
lockout, cfm set point, pre-occupancy purge, economizer controls
and early morning warm-up.
This controller has a 38.4K baud communications capability and
is compatible with
Comfort
Link
™
Controls, CCN (Carrier
Comfort Network
®
) and ComfortVIEW
™
Software. The
Scrolling Marquee and Navigator are optional tools that can be
used for programming and monitoring the unit for optimal
performance. The addition of the Carrier CO
2
sensor in the
conditioned space provides ASHRAE (American Society of
Heating, Refrigeration, and Air Conditioning Engineers) 62-99
compliance and Demand Control Ventilation.
The PremierLink
™
peer-to-peer, internet ready, communicating
control is designed specifically for Constant Volume and Variable
Volume and Temperature applications. This comprehensive
controls system allows all Carrier 3 to 25 ton rooftops to be daisy
chained together on a roof to create a fully functional HVAC
(heating, ventilation, and air conditioning) automation system.
Indoor-air quality begins with Carrier rooftops
Sloped condensate pans minimize biological growth in rooftop
units in accordance with ASHRAE Standard 62. Two-inch filters
with optional dirty filter indicator switch provide for greater
particle reduction in the return air. The face-split evaporator coils
improve the dehumidification capability of standard units,
maximize building humidity control.
Optional proportional reacting CO
2
sensor is available with the
EconoMi$er IV outdoor--air damper option/accessory to aid the
IAQ benefits.
50
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Q
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Summary of Contents for APOLLO CONTROL 50HJQ004-016
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Page 19: ...19 BASE UNIT DIMENSIONS 50TFQ004 007 50 TFQ C06069 50TFQ ...
Page 20: ...20 BASE UNIT DIMENSIONS 50TFQ008 012 C06070 50TFQ ...
Page 76: ...76 BASE UNIT DIMENSIONS 50HJQ004 007 C06006 50HJQ ...
Page 77: ...77 BASE UNIT DIMENSIONS 50HJQ008 012 C06081 50HJQ ...
Page 132: ...132 TYPICAL WIRING SCHEMATICS 50HJQ 50HJQ016 460V SHOWN C06092 50HJQ ...
Page 144: ...144 BASE UNIT DIMENSIONS 50HEQ003 006 C06058 50HEQ ...