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Fujitsu FO20R Series Installation Instructions Manual page 24

Variable speed r-410a heat pump outdoor units
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4.0 INSTALLATION
4.9 Control Wiring (cont.)
TYPICAL SINGLE-STAGE THERMOSTAT:
HEAT PUMP WITH AIR-HANDLER
TYPICAL SINGLE-STAGE THERMOSTAT AND
DUAL-FUEL APPLICATION
NOTES:
(1) FOR PROGRAMMING THERMOSTAT IN DUAL-FUEL APPLICATION, SEE
THERMOSTAT INSTALLATION INFORMATION.
(2) FOR REMOTE SENSOR INSTALLATION, SEE THERMOSTAT INSTALLATION INFORMATION.
(3) OPTIONAL PLENUM SENSOR.
(4) FOR TWO STAGES, CONNECT W2 ON THERMOSTAT TO W2 ON THE CONTROL BOARD.
(5) EMERGENCY HEAT (E) CONNECTION MAY NOT BE ALLOWED BY LOCAL CODES.
(6) A JUMPER MUST BE WIRED BETWEEN Y1 AND Y2 ON FURNACE TO ASSURE
100% NOMINAL AIRFLOW .
24
4.10 Power Wiring
It is important that proper electrical power is
available at the heat pump power terminal block. The
acceptable operating voltage range is shown below.
VOLTAGE RANGES
Nameplate
Voltage
Install a branch circuit disconnect within sight of the
unit and of adequate size to handle the minimum
circuit ampacity (MCA) current (see "Electrical Data"
in Section 3.2).
Field wiring must comply with the National Electric Code
(C.E.C. in Canada) and any applicable local code.
Power wiring must be run in a rain tight conduit.
Conduit must be attached to the hole in the bottom
of the control box.
Connect power wiring to line-voltage lugs on the
terminal block located in the outdoor unit electrical
box. (See wiring diagram attached to unit access
panel.)
Check all electrical connections, including factory
wiring within the unit and make sure all connections
are tight.
DO NOT connect aluminum field wire to the unit line
voltage terminal block.
ST-A1286-04
Operating Voltage Range at
Maximum Load Conditions
Line Voltage Terminal Block
Ground Lug
ST-A1241-02-X0

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