Armstrong Air Conditioning 4HP13 Installatie- en opstartinstructies - Pagina 5
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Pagina afdrukkenReplace service valve cap and torque to 8-11 ft-lb on 3/
8" valves; 12-15 ft-lb on 3/4" valves; 15-20 ft-lb on 7/8"
valves. Use backup wrench on valve body when torqueing
valve cap.
Install Electrical Accessories
Refer to the instructions packaged with the accessories.
Electrical Connections
ELECTRICAL SHOCK HAZARD!
Turn OFF electric power before connecting unit,
performing any maintenance or removing panels or doors.
More than one disconnect may be required to turn off all
power.
FAILURE TO DO SO COULD RESULT IN BODILY
INJURY OR DEATH.
Be sure to check all local codes to determine that the
unit is installed accordance with local requirements. Consult
the National Electric Code for wire size requirements. Use
60 C wire or higher. Always provide ground connections to
the outdoor unit. Power supply must agree with rating on
unit nameplate.
Provide line voltage power supply to unit from a properly
sized disconnect switch. Route power and ground wires
from disconnect switch to unit. Line voltage connections
are made at the line side of the contactor in the control box
of the outdoor unit. Follow the appropriate wiring diagram
attached to inside of the access panel.
Proper circuit protection recommendations are indicated
on Unit Rating Plate. Time delay fuses are required to
prevent blowing due to starting current (the current in rush
when equipment starts is referred to as the Locked Rotor
Amps or (LRA). A fuse of this kind properly sized will give
maximum equipment protection.
Use copper wire only between disconnect switch and
unit.
Remove access panel to gain access to unit wiring.
Extend wires from disconnect through power wiring hole
provided and into unit control box. Flexible conduit is
required for the swing out control box feature.
506318-01
WARNING
The unit cabinet must have an uninterrupted or unbroken
ground to minimize personal injury if an electrical fault
should occur. The ground may consist of electrical wire
or metal conduit when installed in accordance with
existing electrical codes. Failure to follow this warning
can result in an electric shock, fire, or death.
Connect ground wire to ground connection in control box
for safety. Connect power wiring to contactor.
High voltage power connections to 3-phase models is
made to "Pig Tail" leads with field supplied splice connectors.
Control Wiring
The control voltage is 24 Vac. NEC Class I insulated 18
AWG is required for control wiring. For lengths longer than
150 feet, contact your local distributor for technical service.
Ensure the room thermostat is properly installed per
instructions shipped with room thermostat. Generally the
thermostat should not be exposed to sunlight, drafts or
vibration and should not be mounted on exterior walls.
Low voltage control wire connections should be made to
the screw connection terminal board mounted on the defrost
control as shown. All low voltage control wiring must be
separated from incoming power leads.
Issue 0946
WARNING
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