Carrier 24VNA9 Infinity 19VS Instruction Manual

Application Guideline
24VNA9 Infinityr19VS Variable Speed Air Conditioner
with PuronrRefrigerant
The Infinity19VS variable speed air conditioner provides a flexible alternative to high‐priced
variable speed systems on the market today,as well as 2‐stage products currently being
offered.Its highly efficient,smaller and lighter design offers many benefits to dealers and
homeowners alike. This document outlines the recommended application parameters and
differences from other products.
Overview
The Infinity19VS is an inverter‐driven variable speed air conditioner designed for the
ducted residential market. Its size and weight advantage makes it easier for dealers to
handle and stock, and allows for high-efficiency installations in tighter spaces than previously
possible.It is designed to complement the dealer’s product offering by adding a new, unique
variable speed air conditioner to compete in this expanding market.
Benefits of Variable Speed
Variable speed systems provide several benefits to the homeowner. The capacity range of
the system allows it to more closely match the home’s needs as conditions change. This
increases indoor comfort by running longer comfort cycles at lower speeds thus eliminating
up and down temperature swings. Longer cycles at lower speeds also translate into higher
efficiency,and lower overall sound levels both indoors and outside. The wide capacity range
also improves zoning and dehumidification capability compared to 2‐stage and 1-stage
systems.

Comparison to Infinity®17 SEER 2-stage Air Conditioner Systems
With the introduction of the Infinity 19VS heat, you now have a variable speed option in
a straight-cool product. This new model offers several benefits compared to two-stage
systems. Below is a comparison of the new 19VS compared to the Infinity ® 17 two-
stage model:
Infinity 19VS with Touch Control
24VNA9
Infinity 17 two-stage
24ANB7
SEER
Up to 19
Up to 17
EER
Up to 12.5
Up to 13.3
Compressor
Type
Variable-speed Rotary
2-stage Scroll
Compressor
Stages
5 stages as low as 25%
2 stages as low as 70%
Line length
Up to 100ft equivalent length
Up to 250ft equivalent length
Fan motor
Compact ECM(Brushless DC)
No module attached
Inverter driven
Standard PSC
Ambient range
Cool: 40º-115ºF communicating
(4.4º-46.1ºC)
Cool: 55º-115ºF non-communicating
(12.8-46.1ºC)
Not initially qualified for Low
ambient cooling
Cool: 55º-125ºF (12.8º-51.7C)
Low ambient cooling capable
with Infinity Control or kit
Sound
56dBA –72 dBA
67dBA –72 dBA
Basepan sizes
2 and 3 ton - 23”x23”
4 and 5 ton –31.25” x 31.25”
2 ton - 31.25 x 31.25
3-5 ton - 35”x35”
AHRI Ratings
with
Infinity Communicating indoor for
full 5-stage functionality with Touch
Control
Infinity Communicating indoor
for 2-stage functionality with
Touch Control
Performance™2-stage indoor for 2-
stage functionality with 2-stage non-
communication thermostat
Performance™2-stage indoor
for 2-stage capability with 2-
stage non-communicating
thermostat
2

Infinity® 19VS System matching
This air conditioner unit provides the most customer benefit and highest efficiency when
installed as a complete Infinity system including Infinity Touch Control.
Acceptable system combinations will be listed in the AHRI and in My Carrier Ratings
database on HVACpartners.
For increased system flexibility, and increased replacement opportunities, this outdoor
unit is also designed to work with standard non-communicating thermostat inputs.
Combination ratings are available with some non-communicating 2-stage indoor units
such as the FV4C fan coil and 2-stage furnace/coil combinations. When utilizing this
type of indoor unit, a standard non-communicating 2-stage thermostat is required, and
the system will operate with 2-stage functionality.
Compatibility with existing indoor equipment (also see attached flowchart)
Because this unit is designed to work with communicating or standard thermostat
inputs, it opens up opportunities for replacement applications. However, the indoor
components must be of suitable size and configuration.
Existing Infinity communicating indoor equipment
The 19VS is backward compatible with all Infinity communicating indoor
equipment. However, the old style Infinity wall control is not compatible with the
19VS unit in communicating mode (See Figures 1 and 2). The software in the old
style control will not recognize the outdoor unit. For full system capability with
older indoor equipment, the wall control must be upgraded to the Infinity Touch
control with appropriate software.
Figure 1. Old style control Figure 2. Touch control
Check ratings for system matches with FE fan coil. These ratings can be applied
to old and new FE fan coils units.
Old style control
Not compatible with 19VS
Touch Control
Compatible with 19VS
3

For existing furnace applications, the furnace must have a suitable blower size.
Furnace coils built in 2006 or newer can be straight matched to the outdoor unit
tonnage or one size larger*. A Puron®refrigerant TXV is required on the furnace
coil. Furnace coils built between 2005 and 1992 may be straight matched, one or
two tonnage sizes larger than the outdoor unit tonnage*. A Puron refrigerant TXV
must be added to the indoor coil.
Existing 2-stage indoor equipment
The 19VS is capable of operating with a standard 2-stage thermostat and non-
communicating 2-stage indoor equipment. In this case, the outdoor unit will be
wired as a 2-stage system, and will operate as a 2-stage system. Combination
ratings will be available with some furnace/coil and FV4C fan coil combinations.
These ratings will apply to both new and existing equipment of like model
numbers.
An older FV4(A,B) of like size may be used. Unlike the 18VS heat pump, the
model plug in the outdoor unit does not need to be changed in straight-cool
applications.
An older FK or 40FK fan coil may be used with the addition of a Puron refrigerant
TXV. The model plug in the outdoor unit does not need to be changed in straight-
cool applications
For existing furnace applications with the 19VS, the furnace must have a suitable
blower size and staging capability. Furnace coils built in 2006 or newer may be
straight matched to the outdoor unit tonnage or one size larger*. A Puron
refrigerant TXV is required on the furnace coil. Furnace coils built between 2005
and 1992 may be straight matched, one or two sizes larger than the outdoor unit
tonnage*. A Puron refrigerant TXV must be added to the indoor coil.
* Examples
Straight matched to outdoor unit tonnage –3-ton 19VS unit with 3-ton furnace or fan coil
One size larger indoor –3-ton 19VS with 3.5 ton furnace or fan coil
2 sizes larger indoor –3-ton 19VS with older 4 ton furnace coil
4

Existing 1-stage indoor equipment
The 19VS will work with a 1-stage thermostat as a 1-stage system with suitable indoor
coil and fan until the indoor components can be upgraded to provide full variable speed
functionality.
If the indoor furnace coil was built in 2006 or after, it may be straight matched or one
size larger than the outdoor unit tonnage*. If the furnace coil was built between 2005
and 1992, the furnace coil may be straight matched, one or two sizes larger than the
outdoor unit tonnage*. A Puron®refrigerant TXV is required on the indoor coil.
In existing fan coil applications, if the unit was built in 2006 or after, it may be straight
matched or one size larger than the outdoor unit tonnage*. If the fan coil was built
between 2005 and 1992, it may be straight matched, or one size larger tonnage than
the outdoor unit tonnage*. A Puron refrigerant TXV is required on the indoor coil.
Line set limitations
The 19VS is qualified for line sets up to 100ft. equivalent length
Lift limitations:
Outdoor above indoor: 100 ft.
Outdoor below indoor:
2 ton
3 ton
4 ton
5 ton
80ft
80ft
70ft
60ft
See Product Data for line set diameter requirements
Sound
The 19VS uses a pressure equalizer valve (see Figure 3). It is designed to equalize
pressures across the rotary compressor in the off-cycle to ensure easier starting. During
the equalization process, a hissing sound may be heard by customers. This sound is
normal, but the customer should be made aware to avoid nuisance callbacks.
Figure 3. Pressure Equalizer Valve
*Examples
Straight matched to outdoor unit tonnage –3-ton 19VS unit with 3-ton furnace or fan coil
One size larger indoor –3-ton 19VS with 3.5 ton furnace or fan coil
2 sizes larger indoor –3-ton 19VS with older 4 ton furnace coil
5

EER Rating vs. Equipment payback
The published EER rating represents efficiency of cooling products at peak load, or 95ºF
(35ºC). This rating is driven by utility companies that are concerned with power
consumption at peak demand periods. In most locations, peak load is experience for a very
short time during a year (see charts below). The Infinity® 19VS system is designed for high
efficiency at lower load conditions, which represents the vast majority of the cooling season.
This is why the SEER ratings are high, but the EER is not as high on all sizes as other high-
efficiency products. Focusing on SEER allows the smaller unit design, and competitive price
compared to high EER variable speed products. Some incentives and local rebates contain
an EER requirement, while others do not.
A cost payback analysis should be done to compare benefit of a rebate with higher EER
component vs. initial cost and energy savings. Things to consider regarding rebates
containing EER requirements:
(Cost of qualifying EER equipment) –(rebate amount) = ______________
Cost of Infinity 19VS equipment = _____________
Yearly operating cost of qualifying EER equipment using Opcost calculator = __________
Yearly operating cost of 19VS equipment using Opcost calculator = _____________
(Difference in system cost) /( yearly operating cost of 19VS –yearly operating cost from
high EER equipment) = _____
The end number above represents number of years for payback of the additional
investment for equipment to achieve the rebate.
2.22% 0.18% 0.08%
27.00%
6.25%
0.72%
7.83%
1.22% 1.47% 0.42%
St Louis, MO Baltimore, MD Orlando, FL Phoenix, AZ Dallas Ft
Worth, TX
Minneapolis,
MN
Sacramento,
CA
Portland, OR Richmond, VA Atlanta, GA
Avg. Percent of Hours 95°F and Above
97.8% 99.8% 99.9%
73.0% 93.7% 99.3% 92.2% 98.8% 98.5%
St Louis, MO Baltimore, MD Orlando, FL Phoenix, AZ Dallas Ft Worth,
TX Minneapolis, MN Sacramento, CA Portland, OR Richmond, VA
Avg. Percent of Cooling Hours 70°to 90°F
6

Infinity®19VS Air Conditioner System Matching with Existing Indoor Equipment
Infinity® 19 VS AC
w/ Existing Indoor
System
Fan Coil or
Furnace?
Fan Coil
Furnace
2006-Present or
1992-2005?
Not Compatible
Before 1992
Multi-Stage or
Single Stage
Fan Coil?
Multi-Stage or
Single Stage
Fan Coil?
2006 –
Present
1992-
2005
VS, 2-Stage N.C.,
or Single Stage?
 Backward Compatible to any Infinity Capable furnace  Infinity® Touch Required for Communicating
Operation
 Infinity® Touch SW Update may be required  Full functionality with Infinity® Touch Control
 2-Stage Operation with 2-Stage Thermostat  Check AHRI Ratings for current furnaces  High Speed Airflow; 350-400 cfm/ton  Low Speed Airflow; 70-80% of High Stage
 1-Stage Operation until Indoor can be upgraded  1-Stage Operation with 1-Stage Thermostat  Set airflow to 350-400 cfm/ton
Variable Speed
Communicating
2-Stage
Non-Communicating
Single
Stage
Indoor Coil
2006-Present or
1992-2005?
Not Compatible
Before 1992
2006 –
Present
1992-
2005
 See ratings for FV4C, FE matches  5 stages with FE and Touch Control  2 stages with FV and 2-stage stat  Puron® refrigerant TXV required on indoor
 Straight Match or one
size larger than outdoor tonnage
 Puron ® Refrigerant TXV
required
 Straight match, 1, or 2
sizes larger than outdoor unit tonnage
 Puron ® Refrigerant
TXV required
Multi-Stage
Fan Coil
 One stage of operation with stat until indoor
can be upgraded
 Straight match or one size larger indoor  Puron® refrigerant TXV required on indoor  Wire as single stage unit.  Set airflow to 350-400 cfm/ton
Single-Stage
Fan Coil
Multi-Stage
Fan Coil
Single-Stage
Fan Coil
 See ratings for FE matches  Model plug change not required for FV4B/FK/
40FK indoor in cooling only applications
 FV/FK - match size same as current FV  Puron® refrigerant TXV required on indoor  2 stages with FV/FK and 2-stage stat
 One stage of operation until indoor can be upgraded  Indoor straight matched or one size larger than
outdoor
 Puron® refrigerant TXV required on indoor  Wire as single stage unit.  Set airflow to 350-400 cfm/ton
* Examples
 Straight matched to outdoor unit tonnage –
3-ton 19VS with 3-ton furnace or fan coil
 1 size larger indoor –3-ton 19VS with
3.5 ton furnace or fan coil
 2 sizes larger indoor –3-ton 19VS with
older 4 ton furnace coil
7

Copyright 2016 Carrier Corp. S7310 W. Morris St. SIndianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No. 24VNA9---01AG
Replaces: New
Edition Date: 05/16
8