MACS Monthly Newsletter - 2020 - OCT2

single condenser / compressor construction is utilized. Since this article is all about TXVs, you might
ask, "Why not just use two TXVs?" Well, this can
get to be complex because remember, each TXV is
fighting for control of the refrigerant flow and we
don't want just one evaporator to perform well, we
want both evaporators to perform well.
This can require some special valves in order to
pull this off and make them operate properly. The
first valve we should talk about is the "bypass"

Dianetti/Milliman

Obviously using an orifice tube in combination
with the TXV can be a bit odd but in some cases,
this might be the best option. Take for instance
some older automotive applications where two
evaporators are used. The condenser / compressor
architecture is the same as any other system, but
the front and rear evaporators use different control
devices (Figure 1).
There are other cases of this in automotive applications where two evaporators are used and the

Figure 2: Valves having nicked seats or bypass bleeds were designed to reduce oil drop out and pooling of refrigerant in rear or dual evaporator
systems.

October 2020	

2	

MACS Service Reports



MACS Monthly Newsletter - 2020

Table of Contents for the Digital Edition of MACS Monthly Newsletter - 2020

MACS Monthly Newsletter - 2020 - JAN1
MACS Monthly Newsletter - 2020 - JAN2
MACS Monthly Newsletter - 2020 - JAN3
MACS Monthly Newsletter - 2020 - JAN4
MACS Monthly Newsletter - 2020 - JAN5
MACS Monthly Newsletter - 2020 - JAN6
MACS Monthly Newsletter - 2020 - JAN7
MACS Monthly Newsletter - 2020 - JAN8
MACS Monthly Newsletter - 2020 - FEB1
MACS Monthly Newsletter - 2020 - FEB2
MACS Monthly Newsletter - 2020 - FEB3
MACS Monthly Newsletter - 2020 - FEB4
MACS Monthly Newsletter - 2020 - FEB5
MACS Monthly Newsletter - 2020 - FEB6
MACS Monthly Newsletter - 2020 - FEB7
MACS Monthly Newsletter - 2020 - FEB8
MACS Monthly Newsletter - 2020 - MAR1
MACS Monthly Newsletter - 2020 - MAR2
MACS Monthly Newsletter - 2020 - MAR3
MACS Monthly Newsletter - 2020 - MAR4
MACS Monthly Newsletter - 2020 - MAR5
MACS Monthly Newsletter - 2020 - MAR6
MACS Monthly Newsletter - 2020 - MAR7
MACS Monthly Newsletter - 2020 - MAR8
MACS Monthly Newsletter - 2020 - APR1
MACS Monthly Newsletter - 2020 - APR2
MACS Monthly Newsletter - 2020 - APR3
MACS Monthly Newsletter - 2020 - APR4
MACS Monthly Newsletter - 2020 - APR5
MACS Monthly Newsletter - 2020 - APR6
MACS Monthly Newsletter - 2020 - APR7
MACS Monthly Newsletter - 2020 - APR8
MACS Monthly Newsletter - 2020 - MAY1
MACS Monthly Newsletter - 2020 - MAY2
MACS Monthly Newsletter - 2020 - MAY3
MACS Monthly Newsletter - 2020 - MAY4
MACS Monthly Newsletter - 2020 - MAY5
MACS Monthly Newsletter - 2020 - MAY6
MACS Monthly Newsletter - 2020 - MAY7
MACS Monthly Newsletter - 2020 - MAY8
MACS Monthly Newsletter - 2020 - JUN1
MACS Monthly Newsletter - 2020 - JUN2
MACS Monthly Newsletter - 2020 - JUN3
MACS Monthly Newsletter - 2020 - JUN4
MACS Monthly Newsletter - 2020 - JUN5
MACS Monthly Newsletter - 2020 - JUN6
MACS Monthly Newsletter - 2020 - JUN7
MACS Monthly Newsletter - 2020 - JUN8
MACS Monthly Newsletter - 2020 - AUG1
MACS Monthly Newsletter - 2020 - AUG2
MACS Monthly Newsletter - 2020 - AUG3
MACS Monthly Newsletter - 2020 - AUG4
MACS Monthly Newsletter - 2020 - AUG5
MACS Monthly Newsletter - 2020 - AUG6
MACS Monthly Newsletter - 2020 - AUG7
MACS Monthly Newsletter - 2020 - AUG8
MACS Monthly Newsletter - 2020 - SEP1
MACS Monthly Newsletter - 2020 - SEP2
MACS Monthly Newsletter - 2020 - SEP3
MACS Monthly Newsletter - 2020 - SEP4
MACS Monthly Newsletter - 2020 - SEP5
MACS Monthly Newsletter - 2020 - SEP6
MACS Monthly Newsletter - 2020 - SEP7
MACS Monthly Newsletter - 2020 - SEP8
MACS Monthly Newsletter - 2020 - OCT1
MACS Monthly Newsletter - 2020 - OCT2
MACS Monthly Newsletter - 2020 - OCT3
MACS Monthly Newsletter - 2020 - OCT4
MACS Monthly Newsletter - 2020 - OCT5
MACS Monthly Newsletter - 2020 - OCT6
MACS Monthly Newsletter - 2020 - OCT7
MACS Monthly Newsletter - 2020 - OCT8
MACS Monthly Newsletter - 2020 - DEC1
MACS Monthly Newsletter - 2020 - DEC2
MACS Monthly Newsletter - 2020 - DEC3
MACS Monthly Newsletter - 2020 - DEC4
MACS Monthly Newsletter - 2020 - DEC5
MACS Monthly Newsletter - 2020 - DEC6
MACS Monthly Newsletter - 2020 - DEC8
MACS Monthly Newsletter - 2020 - DEC9
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https://www.nxtbook.com/nxtbooks/macs/servicereports_2019
https://www.nxtbook.com/nxtbooks/macs/servicereports_2018
https://www.nxtbook.com/nxtbooks/macs/servicereports_2017
https://www.nxtbook.com/nxtbooks/macs/servicereports_2016
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