Is a TXV important?

[Squire]

I am planning to purchase an Amana AMV9/ASX14. Does anyone know if this has a TXV and is this something I should be looking for?

Thanks.

[udarrell]

I am planning to purchase an Amana AMV9/ASX14. Does anyone know if this has a TXV and is this something I should be looking for
Thanks.

AMV9 Gas Furnace Up to 95% AFUE Performance. AMV9/ACV9 multi-position, two-stage, variable-speed gas furnaces. Two stage gas valve, variable-speed circulator blower.

ASX14 Air Conditioner - R-410A refrigerant -Copeland® scroll compressor, usually don't need a start kit with a Scroll compressor using a TXV.
Has several other good features...

I really like that combination.
I found the Expanded Data.

The 1.5-Ton shows the TXV, the other tonnages don't show it & show shipped orifice sizes.

I would try to get it with a TXV metering device.

Did you get an evaporator model number & what tonnage is the condenser & evaporator coil? - Darrell

[Squire]

The proposed coil is CAPF3642.
The furnace is AMV90704CX, 70,000 BTU
AC is ASX1430, 2.5ton, 30,000BTU


I'd like to know if a TXV is an important consideration or not something I should worry about. I understand what it does, I just don't understand the added benefit. Thanks.

[beenthere]

A TXV can help to remove more moisture, so your home has a lower RH. And helps to reduce the risk of liquid refrigerant flood back. If you use a humidistat to slow the blower to control humidity in the summer.

That coil comes with a piston.

[udarrell]

The proposed coil is CAPF3642.
The furnace is AMV90704CX, 70,000 BTU
AC is ASX1430, 2.5ton, 30,000BTU

I'd like to know if a TXV is an important consideration or not something I should worry about. I understand what it does, I just don't understand the added benefit. Thanks.
It doesn't list it with a TXV, however, the TXV kit is model: TX3N4²

A TXV maintains a set superheat irrespective of normal variances in outdoor & indoor temp conditions.

There are other advantages including beenthere's statement on humidity control & liquid slugging.

The orifice number 0.063 that comes with the 2.5-Ton condenser must be installed in place of the larger numbered orifice in the larger tonnage coil.

However, the two speed condenser fan motor that drops the speeds at lower outdoor temps & your indoor blower features, may help it perform closer to a TXV regarding humidity control in milder weather, than would other combinations.

The important thing, with a fixed orifice, is an accurate superheat charge & to keep a good CFM heatload going through the evaporator coil to prevent liquid slugging of the compressor.

Under differing indoor heatload conditions, the TXV controls the superheat & therefore the rate of liquid entering the evaporator coil. A TXV helps protect the compressor among other things.

The two things I would demand be on my own system, would be a Copeland Scroll compressor & a TXV metering device. (You have one & can have the other one.)

Discuss the TXV vs piston/orifice issue with your contractor. - Darrell

[gary_g]

The proposed coil is CAPF3642.
The furnace is AMV90704CX, 70,000 BTU
AC is ASX1430, 2.5ton, 30,000BTU


That system is AHRI rated without a TXV.

AHRI Reference# 923172. 28,800 btu cooling, 15 SEER, 12.5 EER.

I would get a TXV, for the reasons listed above by BT and DarrellU. I have one for my 14 SEER R22 Goodman heat pump.

Take care.