2.The valves should be kept in the "front seated" (closed) position. This will allow evacuation of the refrigeration lines and the indoor coil, without disturbing the factory charge in the outdoor unit.
3.Follow the vacuum pum p m anufacturer's instructions. Allow the pum p to operate until the system has been evacuated down to 300 microns. Allow the pump to continue running for an additional 15 minutes. Turn OFF the pum p and leave the connections secured to the two (2) service valves. After 5 m inutes, if the system fails to hold 500 m icrons or less, check all connections for tight fit and repeat the evacuation procedure.
4.Isolate the vacuum pump from the system by closing the shutoff valves on the
Opening Service Valves
After evacuation of the connecting lines, rem ove the service valve cap and fully insert the hex wrench into the stem . A
W rench sizes:
3/8 service valve: 3/16" Hex wrench
3/4 service valve: 5/16" Hex wrench
7/8 service valve: 5/16" Hex wrench
Replace service valve cap and torque to
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 determ ine that the unit is installed accordance with local requirem ents. Consult the National Electric Code for wire size requirem ents. 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 m ade 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 recomm endations are indicated on Unit Rating Plate. Tim e delay fuses are required to prevent blowing due to starting current (the current in rush when equipm ent starts is referred to as the Locked Rotor Am ps or (LRA). A fuse of this kind properly sized will give m axim um equipm ent protection.
Use copper wire only between disconnect switch and unit.
Rem ove 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.
The unit cabinet must have an uninterrupted or unbroken ground to minim ize personal injury if an electrical fault should occur. The ground m ay 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
Control Wiring
The control voltage is 24 Vac. NEC Class I insulated 18 AW G is required for control wiring. For lengths longer than 150 feet, contact your local distributor for technical service.
Ensure the room therm ostat is properly installed per instructions shipped with room therm ostat. Generally the therm ostat should not be exposed to sunlight, drafts or vibration and should not be m ounted on exterior walls.
Low voltage control wire connections should be m ade to the screw connection term inal board mounted on the defrost control as shown. All low voltage control wiring m ust be separated from incoming power leads.
Issue 0847 | Page 5 of 14 |
