TXV–CLP-KIT (07/15)
Page 27
TXV Kit Installation: Non-ETI Brand Air Handler or Cased Coil
Before ANY air handler or cased coil brand other than EarthLinked
®
can be utilized with an
EarthLinked
®
heating and cooling system; the coil must meet the following requirements:
Other brands of air handlers and cased coils can be utilized successfully with the EarthLinked
®
system if they meet the above criteria, and are converted in the field, in accordance with the
following procedure:
Thermostatic Expansion Valve (TXV)
If the air handler or cased coil is equipped with a TXV,
the TXV must be removed
so the
liquid refrigerant flows unrestricted and directly to the distributor. The distributor is modified
as described below.
Orifice Metering Device
If the air handler or cased coil has an orifice metering device in the distributor
, the orifice
metering device must be removed.
The distributor is modified as described below.
Distributor Modification
With the TXV (or the orifice) removed, the remaining shoulder in the distributor must be
removed to reduce pressure drop. The shoulder is drilled out.
For system capacities of 1.5 to 3.0 Tons, drill the distributor out using a 5/16” drill bit.
For system capacities of 3.5 to 6.0 Tons, drill the distributor out using a 3/8” drill bit.
Do not allow drilled cuttings or debris to fall into the distributor or the feeder tubes.
Important!
A TXV Kit installed on a Non-ETI brand air handler or cased coil must be
pre-approved by ETI and installed in accordance with the foregoing
instructions for ETI Classic and Prime Series products.
Important!
A TXV Kit installed on a NON-ETI brand air handler or cased coil must be
pre-approved by ETI Technical Support and installed in accordance with
the foregoing instructions for AVS and CCS Series products, and the
instructions that follow.
For an air handler or cased coil to qualify for conversion and use with an
EarthLinked
®
system, the ACR copper feeder tubes must be at least
0.144 inches OD, and 0.1875 inches OD (3/16”) is preferable.
If the ACR copper feeder tubes are smaller OD, the coil should not be
considered for use with the EarthLinked
®
system.
Any air handler or cased coil used in an EarthLinked
®
system should
deliver 400 cfm per nominal ton of capacity. Lower air flow will
negatively impact system performance.
