Guide Specifications - Bryant 704C Product Data

GUIDE SPECIFICATIONS

SINGLE- -PACKAGED ELECTRIC COOLING UNITS
CONSTANT VOLUME APPLICATION
HVAC GUIDE SPECIFICATIONS
SIZE RANGE: 2 TO 5 TONS, NOMINAL COOLING
MODEL NUMBER: 704C
PART I - - GENERAL
SYSTEM DESCRIPTION
Outdoor rooftop or ground mounted electric cooling unit utiliz-
ing a hermetic compressor for cooling duty and optional electric
heating. Unit shall discharge supply air vertically or horizontal-
ly as shown on contract drawings. Outdoor fan/coil section shall
have a draw- -thru design with vertical discharge for minimum
sound levels.
QUALITY ASSURANCE
A. Unit shall be rated in accordance with ARI Standards
210/240, and 270.
B. Unit shall be designed in accordance with UL Standard 1995.
C. Unit shall be manufactured in a facility registered to ISO
9001 manufacturing quality standard
D. Unit shall be UL listed and c- -UL certified as a total package
for safety requirements.
E. Roof curb shall be designed to conform to NRCA Standards.
F. Insulation and adhesives shall meet NFPA 90A requirements
for flame spread and smoke generation.
G. Cabinet insulation shall meet ASHRAE Standard 62P.
DELIVERY, STORAGE, AND HANDLING
Unit shall be stored and handled per manufacturer's recommen-
dations.
PART 2- - PRODUCTS
EQUIPMENT
A. General:
Factory- -assembled, single- -piece, cooling unit. Contained
within the unit enclosure shall be all factory wiring, piping,
controls, refrigerant charge (R- -410A), and special features re-
quired prior to field start- -up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of phosphated,
zinc- -coated, prepainted steel capable of withstanding 500
hrs of salt spray.
2. Normal service shall be through a single removable cabinet
panel.
3. The unit shall be constructed on a rust proof unit base that has
an externally trapped, integrated sloped drain pan.
4. Indoor fan compartment top surface shall be insulated with
a minimum 1/2- -in. thick, flexible fiberglass insulation,
coated on the air side and retained by adhesive and
mechanical means. The indoor wall sections will be
insulated with a foil- -faced insulation capable of being wiped
clean. Aluminum foil- -faced fiberglass insulation shall be
used in the entire indoor air cavity seciton.
5. Unit shall have a field- -supplied condensate trap.
C. Fans:
1. The indoor fan shall be variable- -speed motor and control, as
shown on equipment drawings.
2. Fan wheel shall be made from steel, be double- -inlet type.
It shall have forward- -curved
corrosion- -resistant finish and shall be dynamically
balanced.
3. Outdoor fan shall be of the direct- -driven propeller type with
aluminum blades, riveted to corrosion- -resistant steel
spiders. It shall be dynamically balanced and discharge air
vertically.
D. Compressor:
1. Fully hermetic compressors
vibration isolation.
2. Scroll compressors shall be standard on all units.
E. Coils:
1. Indoor and outdoor coils shall have aluminum plate fins
mechanically bonded to seamless copper tubes with all joints
brazed.
2. Tube sheet openings shall be bellied to prevent tube wear.
F. Refrigerant Metering Device:
Refrigerant metering device shall be of the TXV type.
G. Filters:
Filter section shall consist of field- -installed, throw- -away,
1- -in. thick fiberglass filters of commercially available sizes.
H. Controls and Safeties:
1. Unit controls shall be complete with self- -contained low
voltage control circuit.
2. Units shall incorporate an internal compressor protector that
provides reset capability.
3. Unit shall provide high and low/loss- -of- -charge pressure
safety protection.
I. Operating Characteristics:
1. Unit shall be capable of starting and running at 125°F
ambient outdoor temperature, exceeding maximum load
criteria of ARI Standard 240.
2. Compressor with standard controls shall be capable of
operation down to 55°F ambient outdoor temperature.
J. Electrical Requirements:
All unit power wiring shall enter unit cabinet at a single loca-
tion.
K. Motors:
1. Compressor motors shall be of the refrigerant- -cooled type
with line- -break thermal and current overload protection.
2. All fan motors shall have permanently lubricated bearings
and inherent automatic reset thermal overload protection.
3. Outdoor fan motor shall be totally enclosed.
L. Grille
1. Louvered Grille:
Louvered grille shall be standard on all units.
22
blades with a
with factory- -installed