York Sun Select YV28 User manual

5759090-YIM-A-0320
Revision: A-0320
York International Corporation, 5005
York Drive, Norman, OK 73069
www.york.com
2020-05-01
Johnson Controls Ducted Systems
Installation Manual: YORK® Sun™ Select
YV28 to YV50

Tested in accordance with:

Contents
ContentsGeneral........................................................................... 5
Safety considerations............................................. 5
Inspection................................................................ 6
Reference................................................................. 6
Renewal parts.......................................................... 6
Approvals................................................................. 6
Nomenclature................................................................ 8
Installation..................................................................... 9
Installation safety information.............................. 9
Limitations............................................................... 9
Requirements in the U.S.A............................... 9
Requirements in Canada.................................. 9
Unit components.................................................. 11
Unit limitations...................................................... 12
Location.................................................................. 12
Clearances.............................................................. 12
Rigging and handling........................................... 13
Weights and dimensions...................................... 14
Rain hood dimensions.................................... 16
Economizer outdoor air hood assembly...... 16
Manual damper outdoor air hood
assembly........................................................... 18
Exhaust air hood assembly............................ 20
Pressure line connections for VAV................ 22
Utilities entry.................................................... 24
Condensate drain line installation................ 24
Accessory weights........................................... 26
Roof curbs........................................................ 27
Ductwork................................................................ 29
Placing the equipment over a Trane curb.......... 29
Compressors.......................................................... 29
Converting between 2-in. and 4-in. filters ......... 30
Dirty filter switch pressure setting...................... 31
Power and control wiring..................................... 31
Power wiring detail......................................... 32
Thermostat wiring........................................... 33
Toolless access handle installation..................... 35
Convenience outlet cover installation................ 36
Electrical data........................................................ 38
Constant volume standard static.................. 38
Constant volume medium static................... 40
Constant volume high static.......................... 42
VFD Two-stage standard static...................... 44
VFD Two-stage medium static....................... 46
VFD Two-stage high static.............................. 48
VFD Four-stage standard static..................... 50
VFD Four-stage medium static...................... 52
VFD Four-stage high static............................. 54
VFD Customer supplied standard static....... 56
VFD Customer supplied medium static........ 58
VFD Customer supplied high static............... 60
Physical data.......................................................... 62
Optional gas heat.................................................. 66
Gas piping.............................................................. 66
Gas connection...................................................... 68
Propane units, tanks, and piping........................ 69
Flue exhaust hood................................................ 69
Economizer sequences......................................... 71
Economizer minimum position..................... 71
Free cooling operation................................... 71
Dry bulb changeover...................................... 72
Single enthalpy changeover.......................... 72
Dual enthalpy changeover............................. 72
Auto................................................................... 72
Free cooling operation......................................... 72
Thermostat....................................................... 72
Sensor............................................................... 72
Power exhaust....................................................... 73
Setpoints.......................................................... 73
Inputs................................................................ 73
Outputs............................................................. 73
Operation......................................................... 73
Modulating power exhaust with VFD................. 73
Setpoints and related data............................. 73
Inputs................................................................ 73
Outputs............................................................. 73
Operation......................................................... 73
Smart Equipment™ economizer board.............. 74
Indoor air quality.................................................. 77
Phasing................................................................... 77
Blower rotation..................................................... 77
Adjusting the belt tension.................................... 77
Drive selection....................................................... 79
Airflow performance................................................... 80
Air balance............................................................. 81
Checking air quantity............................................ 82
Johnson Controls Ducted Systems
Installation Manual: YORK® Sun™ Select YV28 to YV50 3

Supply air drive adjustment.......................................... 83
Operation.............................................................................. 84
Cooling sequence of operation.................................... 84
Compressor Operation.................................................. 84
2 Stage Cooling........................................................ 84
4 Stage Cooling........................................................ 84
Gas heat sequence of operation.................................. 84
Two Stage gas heat Ignition Control Board
function............................................................................ 85
Ignition Control Board on standby........................ 85
Pressure switch proving.......................................... 85
Pre-purge.................................................................. 85
Ignition trial period.................................................. 85
Flame stabilization period....................................... 85
Main Burner operation............................................ 85
Post Purge................................................................. 86
Lockout...................................................................... 86
High temperature limit switch................................ 86
Roll-out switch.......................................................... 86
Power interruptions................................................. 86
Flame present with gas off..................................... 86
Welded gas valve relay response........................... 86
Cooling start-up................................................................... 87
Cooling pre-start checklist............................................ 87
Operating the unit......................................................... 87
Post-start checklist......................................................... 87
Gas heat start-up................................................................. 88
Gas heat pre-start checklist.......................................... 88
Operating instructions.................................................. 88
Gas heat post-start checklist........................................ 88
Shutting down the unit................................................. 88
Checking Gas Heat Input.................................................... 90
To determine the rate of gas flow at Second Stage
(full input)........................................................................ 90
To determine the rate of gas flow at First Stage
(minimum input)............................................................. 90
Manifold Gas Pressure Adjustment............................. 91
Two Stage........................................................................ 91
Adjustment Of Temperature Rise................................ 91
Burners/Orifices Inspection/Servicing........................ 92
Charging tables.................................................................... 93
Smart Equipment™ unit control board............................. 96
Four-stage board............................................................... 101
Cable recommendations............................................. 103
Start-up sheet..................................................................... 104
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

General
Safety considerations
This is a safety alert symbol. When you
see this symbol on labels or in manuals,
be alert to the potential for personal
injury.
Understand and pay particular attention the
signal words DANGER, WARNING or CAUTION.
DANGER indicates an imminently hazardous
situation, which, if not avoided, will result in
death or serious injury.
WARNING indicates a potentially hazardous
situation, which, if not avoided, could result in
death or serious injury.
CAUTION indicates a potentially hazardous
situation, which, if not avoided may result in
minor or moderate injury. It is also used to alert
against unsafe practices and hazards involving
only property damage.
WARNING
Improper installation may create a condition
where the operation of the product could cause
personal injury or property damage. Improper
installation, adjustment, alteration, service
or maintenance can cause injury or property
damage. Refer to this manual for assistance
or for additional information, consult a qualified
contractor, installer or service agency.
CAUTION
This product must be installed in strict
compliance with the installation instructions and
any applicable local, state and national codes
including, but not limited to building, electrical,
and mechanical codes.
WARNING
This unit is not intended for use by persons
(including children) with reduced physical,
sensory or mental capabilities, or lack of
experience and knowledge, unless they have
been given supervision or instruction concerning
use of the appliance by a person responsible for
their safety.
Children should be supervised to ensure they do
not play with the unit. Cleaning and maintenance
shall not be performed by children without
supervision.
WARNING
Before you perform service or maintenance
operations on the unit, turn off the main
power switch to unit. Electrical shock could
cause personal injury. Improper installation,
adjustment, alteration, service or maintenance
can cause injury or property damage. Refer
to this manual. For assistance or additional
information consult a qualified installer, service
agency, or the gas supplier.
WARNING
ELECTRICAL SHOCK, FIRE, OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in dangerous operation, serious injury,
death or property damage.
Improper servicing could result in dangerous
operation, serious injury, death, or property
damage.
*Before servicing, disconnect all electrical power
to the furnace.
*When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
*Verify proper operation after servicing.
5
Installation Manual: YORK® Sun™ Select YV28 to YV50
Johnson Controls Ducted Systems

CAUTION
This system uses R-410A refrigerant which operates
at higher pressures than R-22. No other refrigerant
may be used in this system. Gage sets, hoses,
refrigerant containers and recovery systems must be
designed to handle R-410A. If you are unsure, consult
the equipment manufacturer. Failure to use R-410A
compatible servicing equipment may result in property
damage or injury.
WARNING
FIRE OR EXPLOSION HAZARD
If the information in this manual is not followed
exactly, a fire or explosion may result causing property
damage, personal injury or loss of life.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch
• Do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
Due to system pressure, moving parts, and electrical
components, the installation and servicing of
air conditioning equipment can be hazardous.
Only qualified, trained service personnel must
install, repair, or service this equipment. Untrained
personnel can perform basic maintenance functions
of cleaning coils and filters, and replacing filters.
Observe all the precautions in the literature, labels,
and tags that accompany the equipment whenever
you work on air conditioning equipment. Be sure to
follow all other applicable safety precautions and
codes including ANSI Z223.1 or CSA-B149.1- latest
edition.
Wear safety glasses and work gloves. Use
quenching cloth and have a fire extinguisher
available during brazing operations.
This unit is classified as APPLIANCE NOT ACCESSIBLE
TO GENERAL PUBLIC.
Inspection
As soon as you receive a unit, you must inspect
it for possible damage during transit. If damage
is evident, note the extent of the damage on the
carrier’s freight bill. You must make a separate
request for inspection by the carrier’s agent in
writing.
CAUTION
This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state and national codes including,
but not limited to, building, electrical, and mechanical
codes.
The furnace and its individual shut-off valve must
be disconnected from the gas supply piping system
during any pressure testing at pressures in excess of
1/2 psig. Pressures greater than 1/2 psig will cause
gas valve damage resulting in a hazardous condition.
If it is subjected to a pressure greater than 1/2 psig,
the gas valve must be replaced.
The furnace must be isolated from the gas supply
piping system by closing its individual manual shut-
off valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
1/2 psig.
Reference
Additional information is available in the following
reference forms:
• Technical Guide - 5759098
• General Installation - 5759090
• Smart Equipment™ Control Quick Start Guide -
1136326
Renewal parts
Contact your local York® parts distribution center
for authorized replacement parts.
Approvals
The design is certified by CSA as follows:
• For use as a cooling only unit, cooling unit
with supplemental electric heat, or a forced air
furnace.
• For outdoor installation only.
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

• For installation on combustible material and
may be installed directly on combustible
flooring or, in the U.S., on wood flooring
or Class A, Class B or Class C roof covering
materials.
• For use with natural gas. The unit can be
converted to LP with a kit.
CAUTION
This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state, and national codes including,
but not limited to, building, electrical, and mechanical
codes.
WARNING
Improper installation may create a condition where the
operation of the product could cause personal injury
or property damage.
CAUTION
This system uses R-410A refrigerant which operates
at higher pressures than R-22. No other refrigerant
may be used in this system.
Installation Manual: YORK® Sun™ Select YV28 to YV50 7
Johnson Controls Ducted Systems

Nomenclature
Figure 1: Product nomenclature
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

Installation
Installation safety information
Read the following instructions before you install
this appliance. This is an outdoor combination
heating and cooling unit. The installer must ensure
that these instructions are made available to the
consumer. The installer must instruct the consumer
to retain the instructions for future reference.
• Refer to the unit rating plate for the approved
type of gas for this product.
• Install this unit only in a location and position
as specified in the Location section.
• Never test for gas leaks with an open flame.
Use commercially available soap solution
made specifically for the detection of leaks
when you check all connections.
• Always install the furnace to operate within
the furnace's intended temperature-rise
range with the duct system and within the
allowable external static pressure range. This
information is specified on the unit name/
rating plate. See Adjustment Of Temperature
Rise.
• This equipment is not to be used for the
temporary heating of buildings or structures
under construction.
• Provide adequate combustion and ventilation
air to the furnace space as specified in the
Clearances section.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warning exactly could
result in serious injury, death, or property damage.
Never test for gas leaks with an open flame. Use
a commercially available soap solution made
specifically for the detection of leaks to check all
connections. This may result in a fire or explosion,
causing property damage, personal injury, or loss of
life.
Limitations
These units must be installed in accordance with
national wiring regulations and the following
standards.
Requirements in the U.S.A.
• National Electrical Code, ANSI/NFPA No. 70 -
latest edition
• National Fuel Gas Code, ANSI Z223.1 - latest
edition
• Gas-Fired Central Furnace Standard, ANSI
Z21.47a. - latest edition
• Local building codes
• Local gas utility requirements
Requirements in Canada
• Canadian Electrical Code, CSA C22.1
• Installation Codes, CSA - B149.1
• Local plumbing and waste water codes
• Other applicable local codes
Refer to unit application data found in this
document.
After the installation is complete, you must adjust
gas fired units to obtain a temperature rise within
the range specified on the unit rating plate.
If components are added to a unit to meet local
codes, they are installed at the dealer’s and/or
customer’s expense.
The size of the unit for the proposed installation
must be based on a heat loss/heat gain calculation
made according to the methods of the Air
Conditioning Contractors of America (ACCA).
This furnace is not to be used for temporary heating
of buildings or structures under construction.
Installation Manual: YORK® Sun™ Select YV28 to YV50 9
Johnson Controls Ducted Systems

NOTICE
The Smart Equipment™ control board used in this
product can effectively operate the cooling system
down to 0°F when this product is applied in a comfort
cooling application for people. An economizer is
typically included in this type of application. When you
apply this product for process cooling applications
(such as computer rooms or switchgear), call the
applications department for Ducted Systems at
1-877-874-SERV for guidance. Additional accessories
may be needed for stable operation at temperatures
below 30°F.
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

Unit components
Figure 2: Component location
Table 1: Component location table
Item Description Item Description
A Belt drive blower motor with dual centrifugal fan design G Optional variable frequency drive location (VFD not
shown)
BOptional staged gas heat with aluminized or stainless steel heat
exchanger H Copper tube/aluminum fin evaporator coil
CSmart Equipment™ controls IOptional economizer. Optional manual outside air
dampers not shown
D Full perimeter base rails with attached lifting lugs J Optional powered exhaust or barometric relief location
(not visible)
E Filter access, 2-in. or 4-in. filter options K
Scroll compressors in various arrangements to produce
two stages or four stages of cooling, depending on the
selected model
F Condenser fans L Microchannel condenser coils
Installation Manual: YORK® Sun™ Select YV28 to YV50 11
Johnson Controls Ducted Systems

Unit limitations
Table 2: YV28 to YV50 unit limitations
Applied voltage Outdoor DB
temperature
Unit voltage
Minimum Maximum Maximum (°F)
208/230-3-60 187 252 125
460-3-60 432 504 125
575-3-60 540 630 125
Location
Use the following guidelines to select a suitable
location for these units:
• The unit is designed for outdoor installation
only.
• Condenser coils must have an unlimited
supply of air. Where a choice of location is
possible, position the unit on either the north
or east side of the building.
• Suitable for mounting on roof curb.
• For ground level installation, use a level
concrete slab with a minimum thickness of
4 in. The length and width must be at least
6 in. greater than the unit base rails. Do not
tie the slab to the building foundation.
• Roof structures must be able to support
the weight of the unit and its options and
accessories. The unit must be installed on a
solid, level roof curb or appropriate angle iron
frame.
Maintain level tolerance to 1/2 in. across the entire
width and length of the unit.
WARNING
Excessive exposure of the furnace to contaminated
combustion air will result in safety and performance
related problems. Typical contaminates include the
following items:
• Permanent wave solution
• Chlorinated waxes and cleaners
• Chlorine based swimming pool chemicals
• Water softening chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (for example, perchloroethylene)
• Printing inks
• Paint removers
• Varnishes
• Hydrochloric acid
• Cements and glues
• Anti static fabric softeners for clothes dryers
• Masonry acid washing materials
Clearances
All units require particular clearances for proper
operation and service. The installer must make
provisions for adequate combustion and ventilation
air in accordance with section 5.3 of Air for
Combustion and Ventilation of the National Fuel Gas
Code, ANSI Z223.1 – latest edition (in the U.S.A.), or
Sections 7.2, 7.3, or 7.4 of Gas Installation Codes,
CSA-B149.1 (in Canada) - latest edition, and/or
applicable provisions of the local building codes. See
the Unit clearances table for the clearances required
for combustible construction, servicing, and proper
unit operation.
Detailed unit clearances are available in the Weights
and dimensions section.
WARNING
Do not permit overhanging structures or shrubs
to obstruct the condenser air discharge outlet,
combustion air inlet, or vent outlets.
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

Rigging and handling
Exercise care when you move the unit. Do not
remove any packaging until the unit is near the
place of installation. To rig the unit, attach chain or
cable slings to the lifting holes provided in the base
rails. You must use spreader bars across the top of
the unit. The spreader bars must have a length that
exceeds the largest dimension across the unit.
CAUTION
If a unit is installed on a roof curb other than a YORK
roof curb, you must apply gasketing to all surfaces
that come in contact with the unit underside.
CAUTION
Before lifting the unit, make sure that the unit weight is
distributed equally on the rigging cables so that it lifts
evenly.
CAUTION
All panels must be secured in place when the unit is
lifted. The condenser coils must be protected from
rigging cable damage with plywood or other suitable
material.
Installation Manual: YORK® Sun™ Select YV28 to YV50 13
Johnson Controls Ducted Systems

Weights and dimensions
Figure 3: YV28 to YV35 physical dimensions
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

Figure 4: YV40 to YV50 physical dimensions
Installation Manual: YORK® Sun™ Select YV28 to YV50 15
Johnson Controls Ducted Systems

Rain hood dimensions
Figure 5: 27.5 ton to 35 ton rain hood dimensions
Item Description
AEconomizer and manual damper rain
hood
B Power exhaust rain hood
Figure 6: 40 ton to 50 ton rain hood dimensions
Item Description
AEconomizer and manual damper rain
hood
B Power exhaust rain hood
Economizer outdoor air hood assembly
About this task:
After a unit with an economizer is installed in the
field, you must assemble the economizer outdoor
air hood.
To install the outdoor air hood, complete the
following steps.
1. While transporting the unit, the hood top
panel is used as a shipping cover attached to
the unit exterior as shown in Figure 7.
Figure 7: Hood top panel
Item Description
A Screws
B Hood top panel
2. Remove the screws and the hood top panel
as shown in Figure 7 and Figure 8. Keep both
the screws and the top panel for use in a later
step.
Figure 8: Removing the corner screws and top
panel
3. The additional outdoor air hood assembly
parts are shipped behind the top panel
removed in the previous step. This location is
shown in Figure 9.
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

Figure 9: Economizer hood assembly parts
location
Item Description
AEconomizer hood assembly parts
shipping location
4. Using two no. 10 screws that were removed in
Step 2, attach the left side panel and right side
panel to the unit as shown in Figure 10.
Figure 10: Left side and right side panel
mounting
Item Description
A Left side panel
B Right side panel
5. Taking the hood top panel that was removed
in step 2, slide the flange under the lip at the
top of the hood assembly. Lay the panel on
top of the left side and right side panels.
6. Take the small top panel provided with the
assembly components and mount it at the
end of the hood top panel covering the
remainder of the left side and right side
panels. Starting with the small top panel,
attach the two top panels to the left side and
right side panels using the screws provided.
See Figure 11.
Figure 11: Top hood assembly
Item Description
A Hood top panel
B Small top panel
7. To assemble the filter tracks and secure the
filters, insert the first filter track so that the
channel is facing away from the unit.
8. Place the first three filters in the assembly
as shown in Figure 12. Make sure that the
filters rest within the first filter track with
the outdoor edges on top of the L brackets
attached to the inside of the left side and right
side panels.
Installation Manual: YORK® Sun™ Select YV28 to YV50 17
Johnson Controls Ducted Systems

Figure 12: Filter assembly
Item Description
A Filters
B Filter tracks
9. Place the next filter track with the channel
facing the filters just installed, to secure them
in place.
10. Repeat Step 7 through Step 9 with the
second set of filter tracks and filters. The final
assembly can be seen in Figure 12.
11. Attach the left side and right side filter
supports as shown in Figure 13. The
completed assembly will resemble Figure 14.
Figure 13: Filter support assembly
Item Description
A Filter support
B Screws
Figure 14: Completed economizer outside air
hood assembly
Item Description
A Economizer outdoor air hood assembly
Manual damper outdoor air hood
assembly
About this task:
After a unit with a manual damper is installed in
the field, you must assemble the manual damper
outdoor air hood.
To install the outdoor air hood, complete the
following steps.
1. While transporting the unit, the hood top
panel is used as a shipping cover attached to
the unit exterior as shown in Figure 15.
Figure 15: Manual damper hood top panel
Item Description
A Hood top panel
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems

2. Remove the screws and the hood top panel as
shown in Figure 15 and Figure 16. Keep both
the screws and the top panel for use in a later
step.
Figure 16: Removing the screw and top panel
Item Description
A Screws
B Hood top panel
3. The additional outdoor air hood assembly
parts and filters are shipped inside the unit's
return air section. The hardware bag is
shipped in the base of the unit control box.
These locations are shown in Figure 17.
Figure 17: Manual damper hood assembly parts
location
Item Description
A Hardware bag shipping location
BFilter and assembly components
shipping location
4. Using three of the no. 10 screws that were
removed in Step 2, attach the left side panel
and right side panel to the unit as shown in
Figure 18 and Figure 19.
Figure 18: Left side panel mounting
Item Description
A Screws
B Left side panel
Figure 19: Right side panel mounting
Item Description
A Screws
B Right side panel
5. As shown in Figure 20, attach the left side
and right side filter support brackets to the
bottom of the side panels using the screws
provided in the hardware bag.
Installation Manual: YORK® Sun™ Select YV28 to YV50 19
Johnson Controls Ducted Systems

Figure 20: Filter support bracket mounting
Item Description
A Filter support brackets
6. Insert the filters into the channel created
between the side panel and the filter support
bracket.
Figure 21: Filter assembly
Item Description
A Filters
7. Taking the hood top panel that was removed
in Step 2, slide the flange under the lip at the
top of the hood assembly and lay the panel
on top of the left side and right side panels.
Secure the top panel to the side panels using
the remaining screws in the hardware bag as
shown in Figure 22. The completed assembly
will resemble Figure 23.
Figure 22: Attaching the hood top panel
Item Description
A Screws
B Hood top panel
Figure 23: Completed manual damper outdoor
air hood assembly
Item Description
AManual damper outdoor air hood
assembly
Exhaust air hood assembly
About this task:
After a unit with barometric relief or power exhaust
is installed in the field, you must asseble the exhaust
hood.
To install the exhaust hood, complete the following
steps.
Installation Manual: YORK® Sun™ Select YV28 to YV50
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Johnson Controls Ducted Systems