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Importance Of Proper Indoor/Outdoor Match-Ups; Checking Product Received - Fujitsu FO20R Series Installation Instructions Manual

Variable speed r-410a heat pump outdoor units
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be removed in the cooling mode. A heat gain
calculation also calculates the extra heat load
caused by sunlight and by humidity removal. These
factors must be considered before selecting a
heat pump system to provide year-round comfort.
The Air Conditioning Contractors of America
(ACCA) Manual J method of load calculation is one
recognized procedure for determining the heating
and cooling load.
After the proper equipment combination has
been selected, satisfying both sensible and
latent requirements, the system must be properly
installed. Only then can the system provide the
comfort it was designed to provide.
There are several factors that installers must
consider.
• Outdoor unit location
• Indoor unit blower speed and airflow
• Proper equipment evacuation
• Supply and return air duct design and sizing
• Refrigerant charge
• System air balancing
• Diffuser and return air grille location and sizing
IMPORTANT:
elbows in the refrigerant line set can produce
excessive pressure drop. Follow industry
best practices for installation. Installation
and commissioning of this equipment is to
be performed by trained and qualified HVAC
professionals. For technical assistance, contact
your Distributor Service Coordinator.
2.5 Importance of
Proper Indoor/Outdoor
3.1 Model Number Nomenclature and Available Models
FO
Excessive use of
24 20 R V
J C A B
PRODUCT CATEGORY
R – HEAT PUMP
SEER
20 - 20 SEER
CAPACITY
24 – 24,000 BTU
36 – 36,000 BTU
48 – 48,000 BTU
60 – 60,000 BTU
BRAND
FO – FUJITSU
2.0 GENERAL INFORMATION
Match-Ups
To assure many years of reliable operation
and optimum customer comfort and to assure
the outdoor unit warranty remains valid, an air-
handler model or indoor coil/furnace combination
should be selected that is properly matched to the
outdoor unit. This is especially critical for heat
pump systems to assure proper refrigerant charge
balance between the cooling and heating modes.
The recommended approach is to select an air-
handler or indoor coil and gas furnace that has an
AHRI match with the outdoor unit. Refer to the
AHRI directory at www.ahridirectory.org to confirm
the air-handler and outdoor unit are a certified
combination in the AHRI Directory.
2.6 Checking Product
Received
Upon receiving unit, inspect it for any shipping
damage. Claims for damage, either apparent or
concealed, should be filed immediately with the
shipping company. Check model number, electrical
characteristics, and accessories to determine if they
are correct. Check system components (indoor coil,
outdoor unit, air handler/furnace, etc.) to make sure
they are properly matched.
2.7 Compressor
Break-In Notice
Prior to agency testing, system must be operated
for 20 hours at 115ºF [46.1ºC] outdoor ambient
temperature with 80ºF [26.7ºC] dry bulb 75ºF
[23.9ºC] wet bulb indoor ambient temperature to
break the compressor in.
3.0 UNIT SPECIFICATIONS
MAJOR SERIES
B – SECOND DESIGN SERIES
MINOR SERIES
A – FIRST DESIGN SERIES
CONTROLS
C – COMMUNICATING
VOLTAGE
J = 1ph 208-230/60
TYPE
V – VARIABLE SPEED
AVAILABLE MODELS
FO2420RVJCAB
FO3620RVJCAB
FO4820RVJCAB
FO6020RVJCAB
5

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