Bryant Magna VF750C Service Manual

548J***D
SINGLE PACKAGE ROOFTOP
HEAT PUMP UNITS
WITH FIELD- -INSTALLED ELECTRIC HEAT
SIZES 17 & 24 WITH PURON
Certified to ISO 9001
Base Unit
S Puron (R- - 410A) HFC refrigerant
S EER's up to 10.8
S IEER's:
— up to 11.5 with single speed indoor fan motor
— up to 12.0 with 2- - speed/VFD indoor fan motor
S COP's up to 3.3
S ASHRAE 90.1 energy compliant
S Rated in accordance with AHRI Standard 340/360
S Designed in accordance with Underwriters'
Laboratories Standard 1995
S Listed by ETL and ETL- - Canada
S Two- - stage cooling capacity control on all models
S Non- - corrosive composite sloping design; side or center
drain condensate pan. Meets ASHRAE Standard 62
S Cooling operating range from 30_F up to 115_F
(- - 1_C up to 46_C).
S Dedicated vertical and horizontal airflow models
available, ordered as factory option. No special kits
required
S Two- - inch disposable return air filters
S Thru- - the- - bottom power entry capability
S Single point electric connections on field- - installed
electric heat units
S 24- - volt control circuit protected with resettable circuit
breaker and 75- - VA transformer
S Belt drive, constant torque, permanently lubricated
evaporator- - fan motor on all size units.
S Totally enclosed condenser motors with permanently
lubricated bearings
S State- - of- - the- - art defrost control board, easily configured
R
(R- - 410A) REFRIGERANT
Submittal Data
Use of the AHRI Certified
TM Mark indicates a
manufacturer's
participation in the
program For verification
of certification for individual
products, go to
www.ahridirectory.org.
STANDARD FEATURES
DESCRIPTION
548J***D units are one- - piece, two- - stage heat pump units
that are low profile, prewired, tested and charged at the
factory. These are intended for installation on a roof curb
accessory (ordered separately), or for slab mounting (for
horizontal duct connections). Units are designed to accept
field- - installed electric heaters. Units may be ordered with
various factory- - installed options. Field- - installed accessories
are also available.
for defrost cycles of 30, 60, 90, or 120 minutes.
S Central Terminal Board for component and unit wiring
connections.
S Loss of Charge, High- - Pressure, and Freeze Protection
switches
S Full perimeter base rail with built- - in rigging adapters
and fork truck slots.
Cabinet
S Access panels with easy grip handles
S Innovative, easy starting, no strip screw features on unit
access panels.
S Pre- - painted exterior panels and primer- - coated interior
panels tested to 500 hours salt spray protection
S Fully insulated cabinet
S Tool- - less filter access door
Refrigerant System
S Precision sized TXV refrigerant metering devices
S Liquid line filter drier
S Scroll compressors with internal line- - break overload
protection
S Indoor and outdoor coils constructed of aluminum fins
mechanically bonded to seamless copper tubes.
S Removable gauge line plugs for reading refrigerant
pressure with unit panels in place
S Four- - way reversing valve operation
S Suction Line Accumulator standard - - prevents
excessive liquid flood back of refrigerant to the
compressor even during the start of the defrost cycle.