Aire-Flo 18 Installation Instructions Manual Download Page 15

Page 15

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1/12 TURN

A service port cap protects the service port core from contamination
and serves as the primary leak seal.

1 - Remove service port cap with an appropriately sized wrench.

2 - Connect gauge set to service port.

3 - When testing is completed, replace service port cap and tighten as

follows:

With torque wrench: Finger tighten and
torque cap per table 2.

Without torque wrench: Finger tighten and
use an appropriately sized wrench to turn
an additional 1/6 turn clockwise.

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1/6 TURN

Reinstall Stem Cap:

Stem cap protects the valve stem from damage and serves as the
primary seal. Replace the stem cap and tighten as follows:

With Torque Wrench: Finger tighten
and then torque cap per table 2.

Without Torque Wrench: Finger
tighten and use an appropriately
sized wrench to turn an addition­
al 1/12 turn clockwise.

TO ACCESS SERVICE PORT:

FIGURE 16

Checking and Adding System Charge

This unit is factory-charged with enough HFC-410A
refrigerant to accommodate a 15-foot length of refrigerant
piping. Charge should be checked and adjusted using the
tables provided on the charging procedure sticker located
on the unit access panel.

Homeowner Information

CAUTION

Before attempting to perform any service or mainte­
nance, turn the electrical power to unit OFF at dis­
connect switch.

In order to ensure peak performance, your system must be
properly maintained. Clogged filters and blocked airflow
prevent your unit from operating at its most efficient level.

Homeowner Maintenance

The following maintenance may be performed by the
homeowner.

Contact a licensed professional HVAC technician to
schedule a yearly inspection and maintenance
appointment for your equipment.

Check the indoor unit filter each month and replace the
filter, if necessary.
Have your installer show you where your indoor unit filter
is located. It will be either at the indoor unit (installed
internal or external to the cabinet) or behind a return air

grille in the wall or ceiling. Check the filter monthly and
clean or replace it as needed.
Disposable filters should be replaced with a filter of the
same type and size.

Check the indoor unit drain line for obstructions monthly
during the cooling season. 
The indoor evaporator coil is equipped with a drain pan
to collect condensate formed as your system removes
humidity from the inside air. Have your installer show you
the location of the drain line and how to check for
obstructions. (This would also apply to an auxiliary drain,
if installed.)

Check the area around the outdoor unit monthly and
remove any obstructions that may restrict airflow to the
outdoor unit. This would include grass clippings, leaves,
or papers that may have settled around the unit.

Trim shrubbery away from the unit and periodically check
for debris which collects around the unit.

During the winter months, keep the snow level below the
louvered panels.

NOTE

 

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 The filter and all access panels must be in place

any time the unit is in operation. If you are unsure about the
filter required for your system, call your installer for
assistance.

IMPORTANT !

Sprinklers and soaker hoses should not be installed
where they could cause prolonged exposure to the
outdoor unit by treated water. Prolonged exposure
of the unit to treated water (i.e., sprinkler systems,
soakers, waste water, etc.) will corrode the surface
of steel and aluminum parts, diminish performance
and affect longevity of the unit.

Thermostat Operation

See the thermostat homeowner manual for instructions on
how to operate your thermostat.

Pre-Service Check

If your system fails to operate, check the following before
calling for service:

Verify room thermostat settings are correct.

Verify that all electrical disconnect switches are ON.

Check for any blown fuses or tripped circuit breakers.

Verify unit access panels are in place.

Verify air filter is clean.

If service is needed, locate and write down the unit
model number and have it handy before calling.

Professional Maintenance

Your heating and air conditioning system should be
inspected and maintained yearly (before the start of the
cooling and heating seasons) by a licensed professional
HVAC technician. You can expect the technician to check
the following items. 

These checks may only be

conducted by a licensed professional HVAC
technician.

Summary of Contents for 18

Page 1: ...vice clearance of 30 in 762 mm must be maintained on one of the sides adjacent to the control box Clearance to one of the other three sides must be 36 in 914 mm Clearance to one of the remaining two sides may be 12 in 305 mm and the final side may be 6 in 152 mm A clearance of 24 in must be maintained between two units 48 in 1219 mm clearance required on top of unit See NOTES See NOTES See NOTES S...

Page 2: ...all unit level or if on a slope maintain slope tolerance of 2 degrees or 2 inches per 5 feet 50 mm per 1 5 m away from building structure GROUND LEVEL MOUNTING SLAB BUILDING STRUCTURE DISCHARGE AIR SLAB MOUNTING FIGURE 3 STEP 2 REFRIGERANT PIPING Flush ing Existing Line Set and Indoor Coil Flush the existing line set per the following instructions CAUTION DO NOT attempt to flush and re use existin...

Page 3: ...en low pressure rises above 40 psig DO NOT REPLACE COMPRESSOR LIQUID LINE FILTER DRIER INSTALLATION The provided filter drier must be field installed in the liquid line between the outdoor unit s liquid line service valve and the indoor coil s metering device fixed orifice or TXV as illustrated in figure 4 This filter drier must be installed to ensure a clean moisture free system OUTDOOR UNIT LIQU...

Page 4: ...IQUID LINE TO THE SUCTION LINE FLOOR JOIST OR ROOF RAFTER REFRIGERANT LINE SET INSTALLING HORIZONTAL RUNS NOTE Similar installation practices should be used if line set is to be installed on exterior of outside wall PVC PIPE FIBERGLASS INSULATION CAULK OUTSIDE WALL SUCTION LINE WRAPPED WITH ARMAFLEX LIQUID LINE OUTSIDE WALL LIQUID LINE SUCTION LINE WOOD BLOCK BETWEEN STUDS STRAP WOOD BLOCK STRAP S...

Page 5: ... unit s liquid line orifice housing LOW HIGH EXISTING INDOOR UNIT GAUGE MANIFOLD CYLINDER CONTAINING CLEAN HCFC 22 TO BE USED FOR FLUSHING Positioned to deliver liquid refrigerant LIQUID LINE SERVICE VALVE INLET DISCHARGE TANK RETURN CLOSED OPENED RECOVERY CYLINDER RECOVERY MACHINE NEW OUTDOOR UNIT SUCTION LINE SERVICE VALVE SUCTION LIQUID 1 A HCFC 22 cylinder with clean refrigerant positioned to ...

Page 6: ...ur the ends The pipe must remain round Do not crimp end of the line Remove service cap and core from both the suction and liquid line service ports 1 2 ANGLE TYPE SERVICE VALVE SERVICE PORT CORE SERVICE PORT CAP SERVICE PORT CORE SERVICE PORT CAP CUT AND DEBUR LINE SET SIZE MATCHES SERVICE VALVE CONNECTION COPPER TUBE STUB SERVICE VALVE CONNECTION REFRIGERANT LINE DO NOT CRIMP SERVICE VALVE CONNEC...

Page 7: ...ve all water saturated cloths WHEN BRAZING LINE SET TO SERVICE VALVES POINT FLAME AWAY FROM SERVICE VALVE PREPARATION FOR NEXT STEP 7 WRAP SERVICE VALVES To help protect service valve seals during brazing wrap water saturated cloths around service valve bodies and copper tube stubs Use additionalwater saturated cloths underneath the valve body to protect the base paint 4 FLOW NITROGEN Flow regulat...

Page 8: ...ard either the flare seal cap or flare nut with copper flare seal bonnet from the equalizer line port on the suc tion line as illustrated in the figure below B Remove the field provided fitting that temporarily reconnected the liquid line to the indoor unit s distributor assembly INDOOR EXPANSION VALVE INSTALLATION C Install one of the provided Teflon rings around the stubbed end of the check expa...

Page 9: ...unit E After a few minutes open one of the service valve ports and verify that the refrigerant added to the system earlier is measurable with a leak detector F After leak testing disconnect gauges from service ports After the line set has been connected to the indoor and outdoor units check the line set connections and indoor unit for leaks Use the following procedure to test for leaks A Connect t...

Page 10: ...g off the vacuum pump and closing the manifold gauge valves F When the absolute pressure requirement above has been met disconnect the manifold hose from the vacuum pump and connect it to a cylinder of HFC 410A positioned to deliver liquid refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor unit G Perform the following A Connect low side ...

Page 11: ... Use copper wire only with this product CAUTION Failure to use properly sized wiring and circuit breaker may result in property damage Size wiring and circuit breaker s per unit rating plate CAUTION ELECTROSTATIC DISCHARGE ESD Precautions and Procedures Electrostatic discharge can affect electroniccomponents Takecareduring unitinstallationandservice toprotectthe unit s electronic controls Precauti...

Page 12: ...tat wire control wires gauge per table above NOTE Do not bundle any excess 24VAC control wires inside control panel Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated A Run 24VAC control wires through hole with grommet and secure with provided wire tie B Make 24VAC thermostat wire connections Locate the two wires from the contactor and make con...

Page 13: ... wiring for loose connections 3 After evacuation is complete open the liquid line and suction line service valve stems to release the refrigerant charge contained in outdoor unit into the system 4 Replace the stem caps and tighten to the value listed in table 2 5 Check voltage supply at the disconnect switch The voltage must be within the range listed on the unit s nameplate If not do not start th...

Page 14: ...ly use a manifold gauge set that features low loss anti blow back fittings Manifold gauge set used with HFC 410A refrigerant systems must be capable of handling the higher system operating pressures The gauges should be rated for use with pressures of 0 800 psig on the high side and a low side of 30 vacuum to 250 psig with dampened speed to 500 psi Gauge hoses must be rated for use at up to 800 ps...

Page 15: ... it as needed Disposable filters should be replaced with a filter of the same type and size Check the indoor unit drain line for obstructions monthly during the cooling season The indoor evaporator coil is equipped with a drain pan to collect condensate formed as your system removes humidity from the inside air Have your installer show you the location of the drain line and how to check for obstru...

Page 16: ... loose worn or damaged connections Confirm proper voltage plus amperage indoor unit 2 Inspect and clean or replace air filters in indoor unit 3 Check the cleanliness of indoor blower and clean blower if necessary 4 Inspect the evaporator coil Indoor drain pans and condensate drains for rust debris obstructions leaks or cracks Pour water in pans to confirm proper drainage from the pan through to th...

Page 17: ...y Air Temperature Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s information on unit or installation instructions for required subcooling and approach temperatures Subcooling A B SUBCOOLING Saturated Condensing Temperature A minus Liquid Line Temperature B Approach A B APPROACH Liquid Line Temperature A minus Outdoor Air Temperature B Indoor Coil Tempe...

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