26SPA6: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
Notes:
1.Do not apply capillary tube indoor coils to these units.
2.For Tubing Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35
ft.(11 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length, refer to the
Residential Piping and Long Line Guideline – Air Conditioners and Heat Pumps using
Puron Advance™ refrigerant.
3.For alternate liquid line options, see Product Data or Residential Piping and Long Line
Application Guideline
Mechanical Line Set Connections
If using mechanical or crimp-type line set connections, follow crimp tool
manufacturer's instructions. Mechanical fittings are only permitted if
approved for field installation by the supplier.
NOTE: Failure of the fittings or failure of the equipment due to use of
mechanical fittings would not be covered under the equipment limited
warranty.
Install Liquid-Line Filter Drier Indoor
Refer to Fig. 4 and install filter drier as follows:
1. Braze 5-in. liquid tube to the indoor coil.
2. Wrap filter drier with damp cloth.
3. Braze filter drier to above 5-in. (127 mm) liquid tube. Flow arrow
must point towards indoor coil.
4. Connect and braze liquid refrigerant tube to the filter drier.
A05178
Fig. 4 – Liquid Line Filter Drier
Evacuate Refrigerant Tubing and Indoor Coil
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate triple
evacuation method may be used (see triple evacuation procedure in
service manual). Always break a vacuum with dry nitrogen.
Leak Check
The deep vacuum method requires a vacuum pump capable of pulling a
vacuum of 500 microns and a vacuum gauge capable of accurately
measuring this vacuum depth. The deep vacuum method is the most
positive way of assuring a system is free of air and liquid water. A tight
dry system will hold a vacuum of 1000 microns after approximately 7
minutes. See Fig. 5
A95424
Fig. 5 – Deep Vacuum Graph
Mandatory Requirements
Pressure Proof Check
Refrigerant tubes and indoor coil should be pressure tested with an inert
gas such as nitrogen. Pressurize the system with the inert gas to the Low
Side Test Pressure listed on the outdoor unit rating plate.
1. Pform a pressure check of the unit with a nitrogen charge of about
200psi.
2. The Nitrogen holding charge must NOT decrease in pressure for 1
hour, as indicated by the test gauge. The measuring test gauge
resolution not exceeding 5% of the holding charge.
WARNING
!
FIRE HAZARD
Failure to following this warning could result in personal injury, death
and/or property damage.
Refrigerant and oil mixture could ignite and burn as it escapes and
contacts brazing torch. Make sure the refrigerant charge is properly
removed from both the high and low sides of the system before brazing
any component or lines.
CAUTION
!
BURN HAZARD
Failure to follow this caution may result in personal injury
Components will be HOT after brazing. Wear appropriate personal
protective equipment and allow to cool before handling parts and
equipment.
Table 1 – Refrigerant Connections and Recommended Liquid and
Vapor Tube Diameters (In.)
UNIT SIZE
LIQUID
*
RATED VAPOR
*
*.Units are rated with 25 ft. (7.6 m) of lineset. See Product Data sheet for performance
data when using different size and length linesets.
Tube Diameter
Connection
Diameter
Tube Diameter
18 3/8 3/4 5/8
24, 30 3/8 3/4 3/4
36, 42, 48 3/8 7/8 7/8
60 3/8 7/8 1-1/8
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
1. Installation of filter drier in liquid line is required.
2. Filter drier must be wrapped in a heat-sinking material such as a wet
cloth while brazing.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Never use the system compressor as a vacuum pump.
WARNING
!
EXPLOSION HAZARD
Failure to follow this warning could result in death,
serious personal injury and/or property damage.
Never exceed the test pressures listed on the rating
plate when pressure testing an outdoor unit.
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