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4

INSTALLATION/VERIFICATION OF THE 

SYSTEMS EXPANSION DEVICE

After outdoor and indoor unit placement has been determined, 

refer to the Quick Reference Data sheet for information 

on the appropriate fixed orifice metering device to use for 

the equipment.  Verify that the installed expansion device 

matches those requirements or install the correct expansion 

device.  Note: Some outdoor units may include the correct 

indoor orifice expansion device for the installation application 

but is dependent upon the actual unit match.  The correct 

expansion device or kit is available for all approved Nortek 

listed applications from the parts department.

Connecting Refrigerant Tubing Between the Indoor 

& Outdoor Unit

 CAUTION:

When connecting refrigerant line-sets together, 

it is highly recommended that dry nitrogen be 

flowing through the joints during brazing to 

prevent internal oxidation and scaling.  Copper 

oxides, internal to the system can damage the 

compressors bearings and seals, block small 

orifices and microchannels or otherwise damage 

components.

 CAUTION:

When performing brazing operations always 

protect the system components and  seals from 

the possibility of heat damage.  Remove all 

caps, plugs and Schrader valve cores on piping 

system components just prior to assembly and 

brazing.  Use good brazing practices to protect 

components from the heat and flame of the 

brazing torch.

After outdoor and indoor unit placement has been determined, 

route refrigerant tubing between the equipment in accordance 

with sound installation practices.
• Refrigerant tubing should be routed in a manner that 

minimizes the length of tubing and the number of bends 

in the tubing. If precise forming of refrigerant lines is 

required, a copper tubing bender is recommended. Avoid 

sharp bends and contact of the refrigerant lines with metal 

surfaces.

•  Refrigerant tubing should be supported in a manner that the 

tubing will not vibrate or abrade during system operation.

• Tubing should be kept clean of foreign debris during 

installation.

•  Every effort should be made by the installer to ensure that 

the field installed refrigerant containing components of 

the system have been installed in accordance with these 

instructions and sound installation practices to insure 

reliable system operation and longevity.

•  The maximum recommended interconnecting refrigerant 

line lengths is 75 ft. and the vertical elevation difference 

between the indoor and outdoor sections should not exceed 

20 ft.

•  A filter dryer is provided with the unit and must be installed 

in the liquid line of the system. If the installation replaces a 

system with a filter dryer already present in the liquid line, 

the filter dryer must be replaced with the one supplied with 

the unit. The filter dryer must be installed in strict accordance 

with the manufacturer’s installation instructions.

•  Optional equipment such as liquid line solenoid valves, 

low ambient, etc., should be installed in strict accordance 

with the manufacturer’s installation instructions.

•  After the completion of all brazing operations and when 

the components have been properly cooled, replace all the 

seals, Shrader cores and caps which had been previously 

removed.  It is recommended that all seals be either 

lubricated with a light coat of refrigerant oil.  Always verify 

that oil applied matches the oil type listed on the compressor 

nameplate.  A thread sealant which is compatible with 

the system refrigerant and oil can be sparingly applied if 

desired.

 CAUTION:

If repairs are necessary to the refrigerant line-

set or indoor setup after the initial installation, 

then when servicing, cover or seal openings to 

minimize the exposure of the refrigerant system 

to air to prevent accumulation of moisture and 

other contaminants.

Содержание 1SN18K

Страница 1: ...stallation Return these instructions to the customer s package for future reference DO NOT DESTROY PLEASE READ CAREFULLY KEEP IN A SAFE PLACE FOR FUTURE REFERENCE IMPORTANT SAFETY INFORMATION 2 AIR CO...

Страница 2: ...checkout of the equipment When refrigerant tubing and electrical wiring penetrates a structures envelope the openings should be made to be suitably water tight after their installation This unit is de...

Страница 3: ...for unobstructed airflow through the outdoor coil must be maintained in order to achieve rated performance See Figure 1 for minimum clearances to obstructions Overhead obstructions Figure 1 poorly ve...

Страница 4: ...nds and contact of the refrigerant lines with metal surfaces Refrigeranttubingshouldbesupportedinamannerthatthe tubing will not vibrate or abrade during system operation Tubing should be kept clean of...

Страница 5: ...quire modification to the expansion device and refrigerant charging procedures for proper and efficient system operation Therefrigerantchargecanbecheckedandadjustedthrough the service ports provided e...

Страница 6: ...ccordance with the unit wiring diagram and the unit rating plate Connect the line voltage leads to the terminals on the contactor inside the control compartment Use only copper wire for the line volta...

Страница 7: ...al and Figure 3 for panel installation Inspect the electrical connections for tightness at the beginning of each heating and cooling season Service as necessary Do not attempt to add additional oil or...

Страница 8: ...erify that the thermostat is set to the stand by or off setting And the fan switch is set to automatic or off Start Up Procedures The thermostat s function mode should be set to OFF and the fan mode s...

Страница 9: ...troubleshooting a system The system should be charged to match the superheat or subcooling targets as previously noted and not to match the system pressures Follow the same procedure described in 4b a...

Страница 10: ...Quick Reference Data sheet 2 Calculate the amount of additional refrigerant needed for thelinesetlengthoftheactualinstallation Thisinformation is on the first page of the unit s QRD Quick Reference Da...

Страница 11: ...itable for 105 deg C 5 For ampacities and overcurrent protection see unit rating plate 6 Connect to 24 VAC 40VA class 2 circuit See furnace airhandler installation instructions for control circuit and...

Страница 12: ...llon MO Nortek Global HVAC LLC 2022 All Rights Reserved REPLACEMENT PARTS Replacement parts are available through your distributor Please have the complete model and serial number of the unit when ord...

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