Carrier Infinity 26VNA1 Installation Instructions Manual page 8

26VNA1 Infinity® Variable Speed Air Conditioner: Installation Instructions
General Information
Use No. 18 AWG or larger color-coded, insulated (35°C minimum) wire
for low voltage control wires.
All wiring must be NEC Class 2 and must be separated from incoming
power leads.
Use furnace transformer, fan coil transformer, or accessory transformer
for control power requirement of system accessories external to the OD
unit. The outdoor unit has its own transformer power.
Installations using greater than 200 feet of low voltage wiring should
consult the Infinity® System Control manual for additional guidelines
regarding daisy chaining wiring method and terminating resistors.
Never route control wiring in parallel to high voltage power wires when
possible as electrical noise may transfer and generate nuisance fault
codes. Where low voltage control and high voltage wires must cross
paths, do so at perpendicular angles to eliminate transferred noise.
If further communication issues exist, consider using shielded low
voltage wires and only connect shielding to C terminal at end nearest
indoor coil.
Final Wiring Check
IMPORTANT: Check factory wiring and field wire connections to
ensure terminations are secured properly. Check wire routing to ensure
wires are not in contact with tubing, sheet metal, etc.
Step 9 – Compressor Stator Heat
This unit has an internal stator heating function that will be energized
during the off cycle. Furnish power to the unit a minimum of 24 hours
before starting the unit for the first time.
The internal stator heating function is intelligently demanded by the
system to prevent the compressor from being the coldest part of the
system and, thus, enhancing the reliability. The stator heat will function
as needed any time the outdoor unit is powered. The indoor unit and
Infinity® System Control do not need to be installed for the stator heat to
operate properly.
Step 10 – Install Accessories
There are no refrigeration circuit or electrical accessories required or
available for installation within the unit. External to the unit, the same
accessories such as the liquid line solenoid, support feet, snow rack,
wind baffle etc., are available on other Carrier units can also be used on
this line of product. Refer to the individual Installation Instructions
packaged with kits or accessories when installing.
WARNING
!
PERSONAL INJURY AND/OR PROPERTY DAMAGE
HAZARD
Failure to follow this warning could result in personal injury and/or
property damage.
For continued performance, reliability, and safety, the only approved
accessories and replacement parts are those specified by the equipment
manufacturer. The use of non-manufacturer approved parts and
accessories could invalidate the equipment limited warranty and result
in fire risk, equipment malfunction, and failure.
Please review the manufacturer's literature and replacement parts
catalogs available from your equipment supplier.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Step 11 – Start-Up & Charging
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may result in minor personal injury,
equipment damage or improper operation.
Observe the following:
1. Do not overcharge system with refrigerant.
2. Do not operate unit in a vacuum or at negative pressure.
3. Do not disable low pressure transducer or system safety devices
such as discharge line thermistor or the high pressure switch.
4. Dome temperatures may be hot.
5. Discharge line thermistor is engaged tight on the discharge tube.
!
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
Wear safety glasses, protective clothing, and gloves when handling
refrigerant and observe the following:
– Front seating service valves are equipped with Schrader valves.
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental damage.
Federal regulations require that you do not vent
refrigerant to the atmosphere. Recover during system
repair or final unit disposal.
!
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal injury or death.
Do not use power tools to open and close service valves.
Power tools can cause valve stem to suddenly be ejected from the valve
body followed by a high pressure refrigerant leak.
Factory charge amount and desired subcooling are shown in the
Infinity® System Control. To properly check or adjust charge,
conditions must be favorable for subcooling charging in cooling mode.
Favorable conditions exist when the outdoor temperature is between
65°F (18°C) and 105°F (40.6°C) and the indoor temperature is between
65°F (18°C) and 80°F (26.7°C). If the temperatures are outside of these
ranges, weigh-in charge only. To confirm system charge level, you may
return to installation site and verify the subcooling when the
temperatures are in the desired range.
Unit is factory charged for 15 ft (4.57 m) of lineset and for the smallest
internal volume AHRI rated indoor coil combinations. If any refrigerant
charge adjustment is required based on the selected indoor coil
combination, lineset dimensions, environment, and outdoor unit coil
material; the Infinity® System Control will calculate and display the
target subcooling and the amount of additional charge to be added.
Therefore the Infinity® System Control is the source of information for
charging the system and is critical to accurately input system
configuration parameters to ensure proper system operation. Perform a
final charge check only when in cooling and OD is between 65°F (18°C)
and 105°F (40.6°C).
Table 2 can be used as a guideline for determining which climate zone to
select during system configuration setup.
8
CAUTION
CAUTION
CAUTION
WARNING