Step 8 - Compressor Internal Crankcase Heater; Step 9 - Install Accessories; Step 10 - Start- -Up - Carrier 24VNA9 Infinity 19VS Installation Instructions Manual

Step 8 — Compressor Crankcase Heater
This compressor has an internal crankcase heater. Furnish power
to the unit a minimum of 24 hours before starting the unit for the
first time.
To furnish power to heater only, set thermostat to OFF and close
electrical disconnect to outdoor unit.
Power is not required to the indoor unit or User Interface for proper
operation of heater.
energized as needed between operations, even when the UI or
thermostat and indoor unit is not installed, as long as there is power
to the outdoor unit.
Airflow Setup for Infinity Furnace or FE Fan Coil
(communicating)
This system can only be installed with Infinity- -capable indoor and
Infinity Touch User
SYSTXCCITW01 or SYSTXCCITN01 with software version 11
or newer. Version 12 or newer software required on model size 13.
When using an Infinity Touch User Interface, airflow is
automatically selected based on equipment size. The user has the
option of selecting Comfort, Efficiency and Max airflow for
Cooling modes. These should be selected based on balance
between the homeowner's comfort and energy consumption
expectations. See User Interface Installation Instructions for
additional available adjustments.
Due to using a communicating control with the fan coil or the
furnace, dip switch adjustments are not necessary. The outdoor
unit configuration and the indoor airflows are determined by
communicating control setup.
Airflow Setup for Non- -communicating Fan Coil
The system can be installed with a standard 2- -stage thermostat and
FV4C fan coil without additional accessories. Select appropriate
unit size on fan coil Easy select board.
NOTE: FK4 and 40FK require a TXV change. See accessory list
for approved TXV.
NOTE: 24VNA913 is AHRI rated with communicating indoor
units only due to low stage airflow requirements.
Airflow Setup for Non- -communicating Furnaces
For installations with non- -communicating furnaces, set airflows to
350- -400 cfm/nominal ton in high stage and 70- -80 percent of high
stage airflow in low stage.
Step 9 — Install Accessories
No refrigeration circuit accessories are required or are available for
installation within the unit.
accessories such as support feet, snow rack, wind baffle etc.,
available on other Carrier units, can also be used on this line of
product. For models utilizing 23 inch x 23 inch base pans, it is
recommended to use 5 support feet in order to fully support unit.
See Fig. 9. Refer to the individual Installation Instructions
packaged with kits or accessories when installing.
Fig. 9 - - Recommended Support Feet Location
(for 23 x 23 basepans)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Crankcase heater will be intelligently
Interface (UI) SYSTXCCITC01,
External to the unit, the same
Step 10 — Start- -Up
!
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 thermistor or the high pressure
switch.
4.Dome temperatures may be hot.
5.Discharge 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.
!
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.
Follow these steps to properly start up the system:
1. After system is evacuated, close the disconnects to energize
indoor unit, outdoor unit, and User Interface (UI). Do not
attempt to operate the system in heating or cooling mode at
this time. Mode: OFF.
2. Navigate to the service area by pressing MENU from main
screen. Scroll down to service icon and hold until icon
turns green. Once in the Installation and Service menu, se-
lect Refrigerant Charging, then select Charging Cooling.
A14008
8
CAUTION
CAUTION
CAUTION
Fig. 10 - - Service Icon
Catalog No: 24VNA9--- 3SI (rev 1)
Replaces: 24VNA9--- 2SI
A14566