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Fujitsu FO20R Series Installation Instructions Manual page 8

Variable speed r-410a heat pump outdoor units
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4.0 INSTALLATION
4.2 Choosing a Location
4.2.1 Allowable Clearances
12" to side intake louvers
24" to service access panels
60" vertical for fan discharge
If space limitations exist, the following clearances
will have minimal impact to capacity and efficiency
and are permitted:
Single-Unit Applications: Minimum of 6" to side
intake louvers. DO NOT reduce the 60" [152.4
cm] for fan discharge or the 24" [61.0 cm] service
clearances.
Multiple-Unit Applications: For units positioned
next to each other, a minimum of 6" [15.2 cm]
clearance between units is recommended for 2 ton
models and 9" [22.9 cm] for 3 ton to 5 ton models.
Do not reduce the 60" [152.4 cm] for fan discharge
or the 24" [61.0 cm] service clearances.
IMPORTANT:
national building codes and ordinances for special
installation requirements. Following location
information will provide longer life and simplified
servicing of the outdoor heat pump.
NOTICE:
These units must be installed
outdoors. No ductwork can be attached, or other
modifications made, to the discharge grille.
Modifications will affect performance or operation.
6" MIN. (152 mm) FOR 1.5 & 2 TON
9" MIN. (229 mm) FOR 2.5-5 TON
24" MIN. (610 mm)
SERVICE PANELS/
INLET CONNECTIONS
/ HIGH & LOW
VOLTAGE ACCESS
ALLOW 24" [610 mm] OF
CLEARANCE
8
Consult local and
ALLOW 60" [1524 mm]
OF CLEARANCE
AIR INLET LOUVERS ALLOW
6" [152 mm] Min. OF
CLEARANCE ALL SIDES
12" [305 mm] RECOMMENDED
ST-A1226-04-00
4.2.2 Operational Issues
Related to Unit Location
IMPORTANT:
manner that will not prevent, impair, or compromise
the performance of other equipment installed
in proximity to the unit. Maintain all required
minimum distances to gas and electric meters,
dryer vents, and exhaust and inlet openings. In
the absence of national codes or manufacturers'
recommendations, local code recommendations
and requirements will take precedence.
• Refrigerant piping and wiring should be properly
sized and kept as short as possible to avoid
capacity losses and increased operating costs.
• Locate the unit where water runoff will not create
a problem with the equipment. Position the unit
away from the drip edge of the roof whenever
possible. Units are weatherized, but can be
affected by the following:
• Water pouring into the unit from the junction
of rooflines, without protective guttering. Large
volumes of water entering the heat pump while
in operation can impact fan blade or motor life,
and coil damage may occur to a heat pump if
moisture cannot drain from the unit under freezing
conditions.
• Freezing moisture or sleeting conditions can
cause the cabinet to ice-over prematurely and
prevent heat pump operation, requiring backup
heat, which generally results in less economical
operation It is highly recommended to switch
the Digital Control Center or thermostat to the
"Emergency Heat" mode during freezing rain
or sleeting conditions to prevent damage to the
outdoor coil from ice accumulating on the fan
blade.
• Closely follow the clearance recommendations in
section 4.2.1.
• 24" [61.0 cm] to the service panel access.
• 60" [152.4 cm] above the fan discharge (unit
top) to prevent recirculation.
• 6" [15.2 cm] to the coil grille air inlets
with 12" [30.5 cm] minimum recommended.
Locate the unit in a

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