York N1VSD10A06, N1VSD14A06, N2VSD20A06 Installation Instruction

®

TYPE OF APPLICATIONS

UPFLOW DOWNFL OW

HORIZONTAL

ELECTRIC FURNACE

WITH 018 - 024 COIL

WITH 030 - 061 COIL

*

*Right hand ret urn may be used by remov ing Horizo ntal Drain Pa n

WITH 024 COIL

VARIABLE SPEED AIR HANDLERS

FOR USE WITH SPLIT SYSTEM COOLING AND HEAT PUMP

CAUTION

THE ENCL OSED I NST AL LAT I ON INSTRUCTI ONS AND ANY APPL I CABL E

LOCAL , STATE, AND NATIONAL CODES INCLUDING, BUT NOT LIMITE D

TO, BUIL DING, ELECTRICAL, AND MECHANICAL CODES.

T HIS PRODUCT MUST BE INSTALLED IN STRICT COMPL IANCE WITH

WARNING

OPERATION OF THE PRODUCT COULD CAUSE PERSONAL INJURY
OR PROPERTY DAM AGE.

INCORRECT INSTALLA TION MAY CREATE A CONDITION WHERE THE

INSTALLATION INSTRUCTION

GENERAL

This instruction covers the installation of the following variable
speed blower sections.

N1VSD10A06
N1VSD14A06
N2VSD20A06

The blower section is the basic component of an indoor modular
system which may be combined with various accessories listed
below to make an evaporator blower, evaporator blower with
electric heat, heat pump blower, and heat pump blower with
electric heat.

Because of the many ways this Air Handler may be applied and
the large variety of available accessories, the indoor portion of the
cooling or heat pump system comes to you in modules. These
modules must be field assembled to meet the specific needs of
the owner.

If this variable speed air handler is installed with a two stage
(H*DS) outdoor condensing unit, a thermal expansion valve kit
must be installed on the indoor side.

Check modules (accessories, etc.) received, against plans to be
sure all required modules are available for assembly .

Supersedes: 535.03-N1Y (1293)

N*VS BLOWER SECTIONS

CAUTIONS
WARNINGS

and/or equipment damage may result if installation procedures
are not handled properly .

535.03-N1Y (594)

035-10809

are given to prevent equipment damage.

are given to alert the installer that personal injury

INSPECTION

As soon as a unit is received, it should be inspected for possible
damage during transit. If damage is evident, the extent of the
damage should be noted on the carrier’s freight bill. A separate
request for inspection by the carrier’s agent should be made in
writing. See Form 50.15-NM for more information.

REFERENCE

This instruction should be used in conjunction with installation
instructions supplied with each accessory as well as the matching
outdoor section.

Installer should pay particular attention to the words: NOTE,
CAUTION and WA RNING.

NOTES

are intended to clarify or make the installation easier.

FIGURE 1 - Typical Component Application

535.03-N1Y

LIMIT ATIONS

These units must be wired and installed in accordance with all
national and local safety codes.

Voltage limits are as follows:

Air Handler

Voltage

208/230 (06) 187-253

*Utilization range “A” in accordance with ARI Std. 110.

Air flow must be within the minimum and maximum limits ap­proved for electric heat, evaporator coils and outdoor units.

Entering Air Temperature Limits

Wet Bulb Temp. °F Dry Bulb Temp. °F

MIN. MAX. MIN. MAX.

57 72 65 95

*Normal Operating

Voltage Range

3. Precautions should be taken to locate the unit and ductwork
so that supply air does not short circuit to the return air.

4. If evaporator coil is used, locate to permit installation of a
trapped condensate line to an open drain.

5. When an evaporator coil is installed in an attic or above a
finished ceiling, an auxiliary drain pan should be provided
under the coil as is specified by most local building codes.

If the coil is provided with a secondary drain it should be
trapped and piped to a location that will give the occupant a
visual warning that the primary drain is clogged. If the secon­dary drain is not used it must be capped.

6. If unit is located in an area of high humidity, ie. an uncondi­tioned garage or attic, nuisance sweating of casing may
occur. On these installations a wrap of 2" fiberglass insulation
with vinyl vapor barrier should be used.

7. Proper electrical supply must be available.

CLEARANCE

Clearance must be provided for:

1. Refrigerant piping and connections - minimum 12"
recommended.

2. Maintenance and servicing access - minimum 36" from front
of unit recommended for blower motor / coil replacement.

3. Condensate drain line.

4. Filter removal - minimum 36" recommended.

LOCA TION

Location is usually predetermined. Check with owner’s or dealer’s
installation plans. If location has not been decided, consider the
following in choosing a suitable location:

MINIMUM CLEARANCE
OF 1" ALL SIDES

8. Clearances must also be taken into consideration, and pro­vided for as follows:

a. Maintenance and servicing thru the front or access side of

unit with both sides and rear of unit having zero inch
clearance.

b. When no electric heat is used, the unit as well as all duct

work and plenum are designed for zero clearance to
combustible material.

c. If electric heat is used or anticipated, be sure a minimum

clearance of one inch is allowed on all sides of the supply

FLEXIBLE
DUCT

3’

COLLAR

FIGURE 2 - Duct Clearance

1. Select a location with adequate structural support, space for
service access, clearance for air return and supply duct
connections.

2. Normal operating sound levels may be objectionable if the air
handler is placed directly over some rooms such as bed­rooms, study, etc. A flexible duct collar is recommended as
shown in Figure 2 to minimize noise.

2 Unitary Products Group

FIGURE 3 - Typical Wiring and Piping

air duct and plenum. This clearance must be maintained
up to 3 feet a long the supply air duct. See Figure 2.

535.03-N1Y

liquid line connection and distributor . The orifice is identified on a
label next to the liquid connection.

When a discharge plenum forms part of the duct work, it too must
have one inch clearance on all sides.

DUCT CONNECTIONS

NOTE: The electric heat accessory should be installed before the

supply air duct is attached to the supply air openings.

Air supply and return may be handled in one of several ways best
suited to the installation. See Figure 4 for Air Handler inlet and
outlet dimensions. Inlet dimensions of Air Handler are the same
as coil casing outlet dimensions.

The vast majority of problems encountered with combination
heating and cooling systems can be linked to improperly designed
or installed duct systems. It is therefore highly important to the
success of an installation that the duct system be properly de­signed and installed.

Use flexible duct collars to minimize the transmission of vibra­tion/noise into the conditioned space. If electric heat is used
non-flammable material must be used.

Where return air duct is short, or where sound is liable to be a
problem, sound absorbing glass fiber should be used inside the
duct. Insulation of duct work is a must where it runs through an
unheated space during the heating season or through an un­cooled space during the cooling season. The use of a vapor
barrier is recommended to prevent absorption of moisture from
the surrounding air into the insulation.

The supply air opening on the fan unit should be enlarged to the
proper duct size by use of a transition. All ducts should be
suspended using flexible hangers and never fastened directly to
the structure.

Duct work should be fabricated and installed in accordance with local
and/or national codes. This includes the standards of the National
Fire Protection Association for Installation of Air Conditioning and
Ventilating Systems, NFPA No. 90A and Warm Air Heating and Air
Conditioning Systems, NFP A No. 90B.

INDOOR UNIT PREPARATION

Prepare Air Handler for installation as follows:
Each accessory is provided with its own instruction.

1. Attach coil casing to blower section in a way appropriate to
indoor unit application.

See Form 535.01-N5V for G*HC or G*FC Coils and
Form 535.01-N6V for G*HT Coils

Confirm the orifice size before connecting line. The G*HC and
G*FC coils will have an orifice installed in the fitting between the

The orifice that is shipped with the coil is based on the “most sold”
combination, but it may have to be changed, depending on the
capacity and efficiency of the outdoor unit, elevation differences,
and/or long total line lengths. See coil instruction and Application
Data (Form 690.01-AD1V) for detailed piping guidelines.

If a thermal expansion valve kit is installed, the orifice must be
removed.

The G*HT coils have a thermal expansion valve installed in the
liquid line. An orifice is not included in this coil. Be sure the G*HT
coil has been listed as a matched coil in the outdoor unit technical
guide.

NOTE: If a humidistat accessory is installed with the system, a

thermal expansion valve kit or G*HT coil must be installed
on the indoor side.

If a two stage (H*DS) outdoor condensing unit is installed with this
variable speed air handler a thermal expansion valve kit must be
installed.

2. Install Combustible Floor Base accessory if applicable. The
floor base is required on blower-heater combinations with
greater than zero clearance in a downflow position on a
combustible floor.

See Form 535.01- N1.5V

NOTE: Instructions for installing accessories are included with the

accessories.

3. Attach Filter Rack Accessory if applicable. The filter rack is
designed for use with G*HC, G*FC or G*HT coil or blower
section.

See Form 535.01- N1.4V

CAUTION: Equipment should never be operated without filters.

4. Attach Suspension Kit if applicable. The suspension kit is
designed to be used with all sizes of air handlers whenever
the application requires horizontal or vertical suspension of
the unit.

See Form 535.01 - N1.3V

5. Install Air Handler operating controls. A transformer accessory
or an electric heater accessory must be supplied for the
operation of the Air Handler .

See Form 535.03 - N1.1V
See Form 535.01 - N4.1V

Unitary Products Group 3

024

535.03-N1Y

NOTES: Power wiring may be brought into the unit through one of the knockouts in either the top or the right side panel.
Multiple knockouts are provided to accommodate all of the electric heat and transformer accessories that are available.
Use the knockouts that provide the best wire routing for the accessory being used.

024

024

Coil

Model

Blower

*

**G*HT coil models o nly.

GHC,

Size

GFC,

GHT

024

D10

030 14-1/4 22-3/4 54-1/2 3-1/4 6-3/8 14-7/8 16-7/8
036

D14

042 20-1/4 27-7/8 59-5/8 6 8-1/8 20 22
048
060

D20

60D**

061**

G*HT coils are available as sweat connect only.

A B C D E F G H J K L M Liquid Vapor Liquid Vapor

16-1/4 1 12-1/8 3-7/8 12-1/8

22-1/4 3-5/8 14-7/8 3-7/8 12-1/8

26-1/4 5-5/8 14-7/8 3-7/8 12-1/8 24-1/4

Dimensions

14-1/4 22-3/4 54-1/2 3-1/2 1-1/2 1-3/4 3-1/2

20-1/4 22-3/4 54-1/2 6 7-3/8 14-7/8 16-7/8

27-7/8 59-5/8 8 6-3/4 20 22
31-3/8 63-1/8 7-1/4 7-5/8 23-1/2 25-1/2

Refrigerant*

Connections

Quick

Connect

F-6 F-11

Line

Sizes

5/16 5/8
5/16 3/4

3/8 7/8

FIGURE 4 - DIMENSIONS

4 Unitary Products Group