Trane Ascend ACR Series User Manual

AC-SVX001A-EN
75
Normal Shutdown to Stopped or Run
Inhibit
The following diagram shows the Transition from
Running through a Normal (friendly) Shutdown. The
dashed lines on the top attempt to show the final mode
if stop is selected via various inputs.
Figure 57. Sequence of events: normal shutdown to stopped or run inhibit
* Note: Operational Pumpdown is required if the Outdoor Air Tem perature is less than 50F.
**
Note: Operational Pumpdown is Terminated Normally when the Evaporator Refrigerant
Pressure is at or below 20 PSIA.
The Maximum Allowed Tim e for Operational Pumpdown is 2 Minutes.
6
/
1
2
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2
0
1
2
-
8
/
1
5
/
2
0
1
2
S h u ttin g D o w n
R u n n ing C irc u it M o d e s: S h u ttin g D ow n
S ubM o d e : O p erational P um pdow n
*
8
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1
5
/
2
0
1
2
1
2
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1
1
/
2
0
1
2
6
/
1
3
/
2
0
1
2
O p e ra tio nal Pum pdow n
(0 S e conds to 2 M in u te s)
Fully C lo se E X V
P erfo rm O p erational
P um pdow n for A ll
R u n n ing C irc u its if
R equired
*
IF*
C lo se E X V
(0 to 2 5 S eco n d s )
0
0
1
2
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2
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2
0
1
2
-
1
2
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1
1
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0
1
2
C h eck for
N o rm al P u m p d o w n
Term inatio n C rite ria M et
**
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5
5
5
5
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/
/
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2
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2
2
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
N o P u m p do w n R eq u ire d
P um pdo w n
R eq uired
E vap o rato r P u m p O ff D elay
(A d ju stable 1 to 3 0 M in u tes)
S end S to p C o m m and to
A ll
R u n n ing C o m pre ssors
E nergize A ll H e a ters
Fully C lo se B o th E X V s
Turn O ff A ll R u n n in g
C irc u its C o n d e n ser F ans
D e-E n erg ize E vap o rato r
W ater P u m p R elay
S topp e d
or
R un In h ib it
O n e or
M o re
C irc u its
R un n in g
N orm a l P u m pd ow n T e rm in a tion **
C riteria is M et fo r A ll C ircu its
Lo c al Sto p
C h iller Le ve l D iag n ostic – N o rm al Shutd o w n L a tch ed
C h iller Le ve l D iag n ostic – N o rm al Shutd o w n N o n la tched
B u ilding A u tom ation S y stem S top
E xtern al Auto -S top
8
r
r
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a
a
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a
a
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s
s
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ss
0
M
M
1
M
M
2
e
e
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t
t
1
f
f
0
oo
/
r
r
1
A
A
/
A
A
2
l
l
l
l
0
C
C
C
C
2
i
i
S h u ttin g D o w n
C irc u it M o d e s :
A uto
1
0
/
1
6
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2
0
1
2
-
1
2
/
1
1
/
2
0
1
2
S top p ed o r R un In h ib it
C irc u it M o d e s :
S topp e d or A u to
1
0
/
1
7
/
2
0
1
2
2
*Note: Operational Pumpdown is required if the
Outdoor Air Temperature is less than 50°F.
** Note: Operational Pumpdown is terminated
normally when the Evaporator Refrigerant Pressure
is at or below 20 psia.
The Maximum Allowed time for Operational Pumpdown
is 2 minutes.
SSttaarrtt--uupp aanndd SShhuuttddoowwnn

Trane Ascend ACR Series Specifications

General

Brand	Trane
Model	Ascend ACR Series
Category	Chiller
Language	English