Carrier Infinity 26VNA1 Installation Instructions Manual page 7

26VNA1 Infinity® Variable Speed Air Conditioner: Installation Instructions
Fig. 7 – Vacuum Graph
Mandatory Requirements
Pressure Proof Check
Refrigerant tubes and indoor coil should be pressure tested with an inert
gas such as nitrogen. Pressurize the system with the inert gas to the Low
Side Test Pressure listed on the outdoor unit rating plate
1. Perform a pressure check of the unit with inert gas charge of about
200psi, not to exceed the Low Side Test Pressure.
2. The nitrogen holding charge must NOT decrease in pressure for 1
hour, as indicated by the test gauge. The measuring test gauge
resolution not exceeding 5% of the holding charge.
Leak Check
The deep vacuum method requires a vacuum pump capable of pulling a
vacuum of 500 microns and a vacuum gauge capable of accurately
measuring this vacuum depth. The deep vacuum method is the most
positive way of assuring a system is free of air and liquid water. A tight
dry system will hold a vacuum of 1000 microns after approximately 7
minutes (See Fig. 7).
WARNING
!
FIRE HAZARD
Failure to following this warning could result in personal injury, death
and/or property damage.
DO NOT USE FLAMES OR IGNITION SOURCES TO LEAK
CHECK.
Vacuum unit to 500 microns. When isolating the unit from the pump,
the pressure shall not rise above 1500 microns in 10 minutes.
Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both indoor and
outdoor unit has not shifted during shipment. Ensure tubes are not
rubbing against each other or any sheet metal. Pay close attention to
feeder tubes, making sure wire ties on feeder tubes are secure and tight.
Step 8 – Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Do not supply power to unit with compressor control box cover
removed.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Be sure field wiring complies with local and national fire, safety, and
electrical codes, and voltage to system is within limits shown on unit
rating plate. Contact local power company for correction of improper
voltage. See unit rating plate for recommended circuit protection device.
NOTE: Operation of unit on improper line voltage constitutes abuse and
could affect unit reliability. See unit rating plate. Do not install unit in
system where voltage may fluctuate above or below permissible limits.
NOTE: Use copper wire only between disconnect switch and unit.
NOTE: Install branch circuit disconnect of adequate size per NEC to
handle unit starting current. Locate disconnect within sight from and
readily accessible from unit, per Section 440-14 of NEC. Refer to
Product Data for breaker sizing.
Route Ground and Power Wires
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Remove access panel to gain access to unit wiring. Extend wires from
disconnect through power wiring hole provided and into unit control
box.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
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.
Connect Ground and Power Wires
This appliance incorporates an earth connection for safety purposes only.
Connect ground wire to ground connection in control box for safety.
Connect power wiring to contactor as shown in
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
FIELD GROUND
WIRING
Fig. 8 – Line Power Connections
Connect Control Wiring
Connect to Infinity® connections. Only two wires (AB) to Infinity®
capable indoor unit (furnace or fan coil) is required. Typical 4 wire
(ABCD) may be connected (see
may be beneficial in certain installations that are experiencing
communications issues.
IMPORTANT: This system requires the power supply to the outdoor
unit, and the indoor unit, for the Infinity® System Control to
communicate with the outdoor unit.
7
WARNING
!
Fig. 8.
TERMINAL
BLOCK
GROUND
LUG
Fig. 5). C connection is not required but
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