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Aire-Flo 18, Installation Instructions Manual, Page: 12 / 17

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Page 12

STEP 4 -- ELECTRICAL (CONTINUED) -- High Voltage and Field Control Wiring

The following illustration provide an example of control wiring connections when using standard thermostat.

Any excess high voltage field wiring should be
trimmed and secured away from any low voltage field
wiring. To facilitate a conduit, a cutout is located in the
bottom of the control panel. Connect conduit to the
control panel using a proper conduit fitting.

NOTE

 - Wire tie provides low voltage control wire strain

relief and maintains separation of field-installed low and
high voltage circuits.

NOTE

 - For proper voltages, select thermostat 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
connection using field-provided wire nuts:

●

Yellow to Y1

●

Black to C (common)

ROUTING HIGH VOLTAGE, GROUND AND CONTROL WIRING

WIRE RUN LENGTH

AWG#   INSULATION TYPE

LESS THAN 100' (30 METERS)

18      TEMPERATURE RATING

MORE THAN 100' (30 METERS) 16       35ºC MINIMUM.

HIGH VOLTAGE / GROUND WIRES

FIELD CONTROL WIRING

W1

Y

G

C

R

Y

G

C

THERMOSTAT

INDOOR UNIT

POWER

HEAT

COOLING

INDOOR BLOWER

COMMON

OUTDOOR UNIT

Y1

C

W

R

YELLOW

BLACK

FIGURE 12

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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