UPG YZE03811 SERIES Installation Manual

INSTALLATION MANUAL

R-410A
OUTDOOR SPLIT-SYSTEM
HEAT PUMP

MODELS: 18 SEER - YZE03811 SERIES
3 TON

TABLE OF CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

INSTALLATIONS REQUIRING TXV . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

LIST OF FIGURES

Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Tubing Hanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Typical Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CFM Selection Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Thermostat Wiring – Two-Stage Heat Pumps -

Two-Stage Variable Speed Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . 7

Thermostat Wiring – Two-Stage Heat Pump -

Two-Stage Variable Speed Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . 8

LISTED

EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

INSTRUCTING THE OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Thermostat Wiring – Two-Stage Heat Pump -

Variable Speed Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Thermostat Wiring – Two-Stage Heat Pump -

Variable Speed Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Thermostat Wiring – Two-Stage Heat Pump -

Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . .11

Thermostat Wiring – Two-Stage Heat Pump -

Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . .12

Heat Pump Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

ISO 9001

Certified Quality

Management System

LIST OF TABLES

Defrost Initiate Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 R-410A Saturation Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

SECTION I: GENERAL

The outdoor units are designed to be connected to a matching indoor
coil with sweat connect lines. Sweat connect units are factory charged
with refrigerant for the smallest rated indoor coil plus 15 feet of field
supplied lines.

Matching indoor coils are available with a thermal expansion valve or
an orifice liquid feed sized for the most common usage. The orifice size
and/or refrigerant charge may need to be changed for some indoor-out­door unit combinations, elevation differences or total line lengths. Refer
to Application Data covering “General Piping Recommendations and
Refrigerant Line Length” (Part Number 036-61920-001).

SECTION II: SAFETY

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 to 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
alert against unsafe practices and hazards involving only property dam­age

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.

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.

R-410A systems operate at higher pressures than R-22 systems.
Do not use R-22 service equipment or components on R-410A
equipment. Service equipment

Must Be Rated for R-410A.

. It is also used to

361819-YIM-A-0208

361819-YIM-A-0208

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 delivery receipt. A separate request for
inspection by the carrier’s agent should be made in writing. See Local
Distributor for more information.

Requirements For Installing/Servicing R-410A Equipment

• Gauge sets, hoses, refrigerant containers, and recovery system
must be designed to handle POE oils, and the higher pressures
of R-410A.

• Manifold sets should be 800 PSIG high side and 250 PSIG low
side with 550 PSIG low side restart.

• All hoses must have a 700 PSIG service pressure rating.

• Leak detectors should be designed to detect HFC refrigerant.

• Recovery equipment (including refrigerant recovery containers)
must be specifically designed to handle R-410A.

• Do not use an R-22 TXV.

• A liquid-line filter drier is required on every unit.

LIMITATIONS

The unit should be installed in accordance with all National, State and
Local Safety Codes and the limitations listed below:

1. Limitations for the indoor unit, coil and appropriate accessories
must also be observed.

2. The outdoor unit must not be installed with any duct work in the air
stream. The outdoor fan is the propeller type and is not designed
to operate against any additional external static pressure.

3. The maximum and minimum conditions for operation must be
observed to assure a system that will give maximum performance
with minimum service.

AIR TEMPERATURE DB AT

OUTDOOR COIL, °F

Min. Max. Min. Max.

Cool Heat Cool Heat

50 -10 115 75 57

1. Operation below this temperature is permissible for a short period of
time, during morning warm-up.

4. This unit is not designed to operate with a low ambient kit. Do not
modify the control system to operate with any kind of low ambient
kit.

5. The maximum allowable line length for this product is 75 feet.

AIR TEMPERATURE AT

INDOOR COIL, °F

°WB
Cool

°DB

Heat

50

1

°WB
Cool

72 80

°DB

Heat

SECTION III: UNIT INSTALLATION

LOCATION

Before starting the installation, select and check the suitability of the
location for both the indoor and outdoor unit. Observe all limitations and
clearance requirements.

The outdoor unit must have sufficient clearance for air entrance to the
condenser coil, for air discharge and for service access. See Figure 1.

NOTE: For multiple unit installations, units must be spaced a minimum

of 18 inches apart. (Coil face to coil face.)

If the unit is to be installed on a hot sun exposed roof or a black-topped
ground area, the unit should be raised sufficiently above the roof or
ground to avoid taking the accumulated layer of hot air into the outdoor
unit.

Provide an adequate structural support.

ADD-ON REPLACEMENT/RETROFIT

When this unit is being used as a replacement for an R-22 unit, it is
required that the outdoor unit, indoor coil, and metering device all be
replaced. The following steps should be performed in order to insure
proper system operation and performance. Line-set change out is also
recommended.

1. Change-out of the indoor coil to an approved R-410A coil/ con­densing unit combination with the appropriate metering device.

2. Change-out of the line-set when replacing an R-22 unit with an
R410-A unit is highly recommended to reduce cross-contamina­tion of oils and refrigerants.

3. If change-out of the line set is not practical, then the following pre­cautions should be taken.

• Inspect the line set for kinks, sharp bends, or other restrictions,
and for corrosion.

• Determine if there are any low spots which might be serving as oil
traps.

• Flush the line set with a commercially available flush kit to
remove as much of the existing oil and contaminants as possible.

• Install a suction line filter-drier to trap any remaining contami­nants, and remove after 50 hours of operation.

4. If the outdoor unit is being replaced due to a compressor burnout,
then installation of a 100% activated alumina suction-line filter
drier in the suction-line is required, in addition to the factory
installed liquid-line drier. Operate the system for 10 hours. Monitor
the suction drier pressure drop. If the pressure drop exceeds 3
psig, replace both the suction-line and liquid-line driers. After a
total of 10 hours run time where the suction-line pressure drop has
not exceeded 3 psig, replace the liquid line drier, and remove the
suction-line drier. Never leave a suction-line drier in the system
longer than 50 hours of run time.

TO INDOOR
BLOWER

TO COIL

SEAL OPENINGS WITH
PERMAGUM OR EQUIVALENT

NOTE: ALL OUTDOOR WIRING MUST BE WEATHERPROOF

FIGURE 1: Typical Installation

2 Unitary Products Group

THERMOSTAT

NEC CLASS 2
WIRING

18” FRONT

& SIDES

NEC CLASS 1

WIRING

DISCONNECT SWITCH

WEATHERPROOF

48” OVERHEAD
CLEARANCE

24” SERVICE
ACCESS
CLEARANCE

361819-YIM-A-0208

GROUND INSTALLA TION

The unit may be installed at ground level on a solid base that will not
shift or settle, causing strain on the refrigerant lines and possible leaks.
Maintain the clearances shown in Figure 1 and install the unit in a level
position.

Normal operating sound levels may be objectionable if the unit is placed
directly under windows of certain rooms (bedrooms, study, etc.).

Condensate will drain from beneath the coil of the outdoor unit during
the defrost cycle. Normally this condensate may be allowed to drain
directly on the ground.

The outdoor unit should not be installed in an area where mud or
ice could cause personal injury. Remember that condensate will
drip from the unit coil during heat and defrost cycles and that this
condensate will freeze when the temperature of the outdoor air is
below 32°F.

Elevate the unit sufficiently to prevent any blockage of the air entrances
by snow in areas where there will be snow accumulation. Check the
local weather bureau for the expected snow accumulation in your area.

Isolate the unit from rain gutters to avoid any possible wash out of the
foundation.

ROOF INSTALLATION

When installing units on a roof, the structure must be capable of sup­porting the total weight of the unit, including a pad, lintels, rails, etc.,
which should be used to minimize the transmission of sound or vibra­tion into the conditioned space.

UNIT PLACEMENT

1. Provide a base in the pre-determined location.

2. Remove the shipping carton and inspect for possible damage.

3. Compressor tie-down bolts should remain tightened.

4. Position the unit on the base provided.
NOTE: Heat pumps will defrost periodically resulting in water drainage.

The unit should not be located where water drainage may freeze
and create a hazardous condition - such as sidewalks and
steps.

LIQUID LINE FILTER-DRIER

The heat pumps have a solid core bi-flow filter/dryer located on the liq­uid line.

NOTE: Replacements for the liquid line drier must be exactly the same

as marked on the original factory drier. See Source 1 for O.E.M.

replacement driers.

Failure to do so or using a substitute drier or a granular type may
result in damage to the equipment.

R-410A / R-22

Filter-Drier

Source 1 Part No.

026 - 25512 - 000 All Sizes

Apply with Models

YZE

PIPING CONNECTIONS

This system uses R-410A refrigerant which operates at higher pres­sures than R-22. No other refrigerant may be used in this system.
Gauge sets, hoses, refrigerant containers, and recovery system
must be designed to handle R-410A. If you are unsure, consult the
equipment manufacturer.

Never install a suction-line filter drier in the liquid line of an R-410A
system. Failure to follow this warning can cause a fire, injury or
death.

The outdoor unit must be connected to the indoor coil using field sup­plied refrigerant grade copper tubing that is internally clean and dry.
Units should be installed only with the tubing sizes for approved system
combinations as specified in Tabular Data Sheet. The charge given is
applicable for total tubing lengths up to 15 feet. See Application Data
Part Number 036-61920-001 for installing tubing of longer lengths and
elevation differences.

NOTE: Using a larger than specified line size could result in oil return

problems. Using too small a line will result in loss of capacity
and other problems caused by insufficient refrigerant flow. Slope
horizontal vapor lines at least 1" every 20 feet toward the out­door unit to facilitate proper oil return.

PRECAUTIONS DURING LINE INSTALLATION

1. Install the lines with as few bends as possible. Care must be taken

not to damage the couplings or kink the tubing. Use clean hard
drawn copper tubing where no appreciable amount of bending
around obstruction is necessary. If soft copper must be used, care
must be taken to avoid sharp bends which may cause a restriction.

2. The lines should be installed so that they will not obstruct service

access to the coil, air handling system or filter.

3. Care must also be taken to isolate the refrigerant lines to minimize

noise transmission from the equipment to the structure.

4. The vapor line must be insulated with a minimum of 1/2" foam rub-

ber insulation (Armaflex or equivalent). Liquid lines that will be
exposed to direct sunlight and/or high temperatures must also be
insulated.

Tape and suspend the refrigerant lines as shown. DO NOT allow tube
metal-to-metal contact. See Figure 2.

5. Use PVC piping as a conduit for all underground installations as

shown in Figure 3. Buried lines should be kept as short as possible
to minimize the build up of liquid refrigerant in the vapor line during
long periods of shutdown

6. Pack fiberglass insulation and a sealing material such as perma-

gum around refrigerant lines where they penetrate a wall to reduce
vibration and to retain some flexibility.

7. See Form 690.01-AD1V for additional piping information.

Sheet Metal Hanger

Liquid
Line

Incorrect

Unitary Products Group 3

Correct

FIGURE 2: Tubing Hanger

Tape

Insulated Vapor Line

361819-YIM-A-0208

TO INDOOR COIL

LIQUID LINE

PVC

CONDUIT

INSULATED

VAPOR LINE

TO O UT DO OR U NI T

CAP

FIGURE 3: Underground Installation

PRECAUTIONS DURING BRAZING OF LINES

All outdoor unit and evaporator coil connections are copper-to-copper
and should be brazed with a phosphorous-copper alloy material such
as Silfos-5 or equivalent. DO NOT use soft solder. The outdoor units
have reusable service valves on both the liquid and vapor connections.
The total system refrigerant charge is retained within the outdoor unit
during shipping and installation. The reusable service valves are pro­vided to evacuate and charge per this instruction.

Serious service problems can be avoided by taking adequate precau­tions to assure an internally clean and dry system.

Dry nitrogen should always be supplied through the tubing while it
is being brazed, because the temperature required is high enough
to cause oxidation of the copper unless an inert atmosphere is pro­vided. The flow of dry nitrogen should continue until the joint has
cooled. Always use a pressure regulator and safety valve to insure
that only low pressure dry nitrogen is introduced into the tubing.
Only a small flow is necessary to displace air and prevent oxidation.

PRECAUTIONS DURING BRAZING SERVICE VALVE

Wrap a wet rag around the service valve as shown in Figure 4 to pre­vent heat damage. Also, protect all painted surfaces, insulation, and
plastic base during brazing. After brazing cool joint with wet rag.

This is not a backseating valve. The service access port has a
valve core. Opening or closing valve does not close service access
port.

If the valve stem is backed out past the chamfered retaining wall,
the O-ring can be damaged causing leakage or system pressure
could force the valve stem out of the valve body possibly causing
personal injury.

Valve can be opened by removing the plunger cap and fully inserting a
hex wrench into the stem and backing out counter-clockwise until valve
stem just touches the chamfered retaining wall.

Connect the refrigerant lines using the following procedure:

1. Remove the cap and Schrader core from both the liquid and vapor
service valve service ports at the outdoor unit. Connect low pres­sure nitrogen to the liquid line service port.

2. Braze the liquid line to the liquid valve at the outdoor unit. Be sure
to wrap the valve body with a wet rag. Allow the nitrogen to con­tinue flowing. Refer to the Tabular Data Sheet for proper liquid line
sizing.

3. Carefully remove the rubber plugs from the evaporator liquid and
vapor connections at the indoor coil.

FIGURE 4: Heat Protection

The evaporator is pressurized.

4. Braze the liquid line to the evaporator liquid connection. Nitrogen
should be flowing through the evaporator coil.

5. Slide the grommet away from the vapor connection at the indoor
coil. Braze the vapor line to the evaporator vapor connection. After
the connection has cooled, slide the grommet back into original
position. Refer to the Tabular Data Sheet for proper vapor line siz­ing.

6. Protect the vapor valve with a wet rag and braze the vapor line
connection to the outdoor unit. The nitrogen flow should be exiting
the system from the vapor service port connection. After this con­nection has cooled, remove the nitrogen source from the liquid fit­ting service port.

7. Replace the Schrader core in the liquid and vapor valves.

8. Go to “SECTION IV” for TXV installation.

9. Leak test all refrigerant piping connections including the service
port flare caps to be sure they are leak tight. DO NOT OVER­TIGHTEN (between 40 and 60 inch - lbs. maximum).

10. Evacuate the vapor line, evaporator and the liquid line, to 500
microns or less.

NOTE: Line set and indoor coil can be pressurized to 250 psig with dry

nitrogen and leak tested with a bubble type leak detector. Than
release the nitrogen charge.

NOTE: Do not use the system refrigerant in the outdoor unit to purge or

leak test.

11. Replace cap on service ports. Do not remove the flare caps from
the service ports except when necessary for servicing the system.

Do not connect manifold gauges unless trouble is suspected.
Approximately 3/4 ounce of refrigerant will be lost each time a stan­dard manifold gauge is connected.

12. Release the refrigerant charge into the system. Open both the liq­uid and vapor valves by removing the plunger cap and with an
allen wrench back out counter-clockwise until valve stem just
touches the chamfered retaining wall. See Page 4 "PRECAU­TIONS DURING BRAZING SERVICE VALVE".

13. Replace plunger cap finger tight, then tighten an additional 1/12
turn (1/2 hex flat). Cap must be replaced to prevent leaks.

4 Unitary Products Group

Never attempt to repair any brazed connections while the system is
under pressure. Personal injury could result.

See "System Charge” section for checking and recording system
charge.

SECTION IV: INST ALLA TIONS REQUIRING
TXV

For installations requiring a TXV, the following are the basic steps for
installation. For detailed instructions, refer to the Installation Instructions
accompanying the TXV kit.

Install TXV kit as follows:

1. First, relieve the holding charge by depressing the Schrader valve
located in the end of the liquid line.

2. After holding charge is completely discharged, loosen and remove
the liquid line fitting from the orifice distributor assembly. Note that
the fitting has right

3. Remove the orifice from the distributor body using a small diame­ter wire or paper clip. Orifice is not used when the TXV assembly
is installed.

4. After orifice is removed, install the thermal expansion valve to the
orifice distributor assembly with supplied fittings. Hand tighten and
turn an additional 1/8 turn to seal. Do not overtighten fittings

5. Reinstall the liquid line to the top of the thermal expansion valve.
Hand modify the liquid line to align with casing opening.

6. Install the TXV equalizer line into the vapor line as follows:
a. Select a location on the vapor line for insertion of the equal-

izer line which will not interfere with TXV bulb placement.

b. Use an awl to punch through the suction tube and insert the

awl to a depth to achieve a 1/8” diameter hole.

7. Install TXV equalizer line in 1/8” hole previously made in vapor
line. Equalizer line should not be bottomed out in vapor line. Insert
equalizer line at least 1/4” in the vapor line. Braze equalizer line
making sure that tube opening is not brazed closed.

Dry nitrogen should always be supplied through the tubing while it
is being brazed, because the temperature required is high enough
to cause oxidation of the copper unless an inert atmosphere is pro­vided. The flow of dry nitrogen should continue until the joint has
cooled. Always use a pressure regulator and safety valve to insure
that only low pressure dry nitrogen is introduced into the tubing.
Only a small flow is necessary to displace air and prevent oxidation.

All connections to be brazed are copper-to-copper and should be
brazed with a phosphorous-copper alloy material such as Silfos-5 or
equivalent. DO NOT use soft solder.

Install the TXV bulb to the vapor line near the equalizer line, using the
two bulb clamps furnished with the TXV assembly. Ensure the bulb is
making maximum contact. Refer to TXV installation instruction for view
of bulb location.

hand threads.

.

361819-YIM-A-0208

b. If bulb installation is made on a vertical run, the bulb should

be located at least 16 inches from any bend, and on the tub­ing sides opposite the plane of the bend. The bulb should be
positioned with the bulb tail at the top, so that the bulb acts as
a reservoir.

c. Bulb should be insulated using thermal insulation pro vided to

protect it from the effect of the surrounding ambient tempera­ture.

SECTION V: ELECTRICAL CONNECTIONS

GENERAL INFORMATION & GROUNDING

Check the electrical supply to be sure that it meets the values specified
on the unit nameplate and wiring label.

Power wiring, control (low voltage) wiring, disconnect switches and over
current protection must be supplied by the installer. Wire size should be
sized per NEC requirements.

All field wiring must USE COPPER CONDUCTORS ONLY and
be in accordance with Local, National Fire, Safety & Electrical
Codes. This unit must be grounded with a separate ground
wire in accordance with the above codes.

The complete connection diagram and schematic wiring label is located
on the inside surface of the unit service access panel and this instruc­tion.

FIELD CONNECTIONS POWER WIRING

1. Install the proper size weatherproof disconnect switch outdoors
and within sight of the unit.

2. Remove the screws at the bottom of the corner cover. Slide corner
cover down and remove from unit. See Figure 5.

3. Run power wiring from the disconnect switch to the unit.

4. Remove the service access panel to gain access to the unit wiring.
Route wires from disconnect through power wiring opening pro­vided and into the unit control box.

5. Install the proper size time-delay fuses or circuit breaker, and
make the power supply connections.

6. Energize the crankcase heater if equipped to save time by pre­heating the compressor oil while the remaining installation is com­pleted.

SERVICE
ACCESS
PANEL

In all cases, mount the TXV bulb after vapor line is brazed and has
had sufficient time to cool.

a. Bulb should be installed on a horizontal run of the vapor line if

possible. On lines under 7/8" OD the bulb may be installed on
top of the line. With 7/8" OD and over, the bulb should be
installed at the position of about 2 or 10 o'clock.

Unitary Products Group 5

CONTROL
WIRING

POWER
WIRING

FIGURE 5: Typical Field Wiring

CORNER
COVER