Trane Ascend ACR Series User Manual

70
AC-SVX001A-EN
Power Up to Starting
The following diagram shows the timing from a power
up event to energizing the first compressor. The
shortest allowable time would be under the following
conditions:
• No motor restart inhibit time left from subsequent
starts
• Evaporator Water flow occurs quickly with pump on
command
• Power up Start Delay set to 0 minutes
• Need to cool (differential to start) already exists
• Oil level is detected immediately
The above conditions would allow for a minimum
power up to starting the first compressor time of about
45 seconds (variations may exist due to options
installed). Note that it is not advisable to start a chiller
“cold”, the oil heaters should be in operation for a
sufficient length of time prior to first start.
Figure 52. Sequence of events: power up to starting
6
/
1
2
/
2
0
1
2
-
1
2
/
1
1
/
2
0
1
2
Confirm Presence
of Oil W ithin
90 Seconds
6
/
1
1
5
5
55
5
5
/
2
2
2
2
2
2
0
0
0
0
0
0
0
C
0
0
1111
1
1
1
C
2222
2
2
2
o
Power
Applied
6
66
6
6
6
6
6
/
/
//
/
/
/
/
/
1
1
1
1
1
1
111
1
2
2
2
2
2
2
2
2
/
/
/
/
/
/
/
/
/
2
2
2
2
2
2
2
2
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
-
-
-
-
7
7
7
7
7
7
7
7
/
/
/
/
/
/
/
/
/
3
3
3
3
3
3
3
3
/
/
//
/
/
/
/
/
2
2222
2
2
0
1
2
Power
Up
6
/
1
3
/
2
0
1
2
UC800
Boot Tim e
(25 Sec)
Auto Mode com m anded
by Front Panel or BAS
EXVs self-
close on
power up
Confirm Evaporator Water Flow
(6 Second Filter)
Enforce Restart Inhibit Timer
(0 to 1 minute)
Power Up Delay Inhibit Tim er
(User Adjustable 0 to 30 m inutes)
7
7
7
7
7
/
/
/
/
/
2
2
2
2
2
/
/
/
/
/
2
2
2
2
2
0
0
0
0
0
1
1
1
1
1
2
2
2
2
2
-
-
-
-
9
9
9
9
9
/
/
/
/
/
3
3
3
3
3
/
/
/
/
/
2
2
2
2
2
0
0
0
0
0
1
1
1
1
1
2
2
2
2
2
Auto
Energize Evaporator
Water Pum p Relay
6
/
1
2
/
2
0
1
2
-
1
2
/
1
1
/
2
0
1
2
Confirm Evaporator Water
Flow W ithin 20 minutes
(6 Second Filter)
Oil Heaters
Always Energized
when Compressor
is De-energized
6
/
/
1
1
4
4
4
/
2
2
2
0
W
1
W
2
a
7
7
/
/
3
3
3
/
/
2
2
2
0
E
E
1
2
f
f
a
s
s
d
E
E
(
(
f
E
E
n
n
0
0
EXV remains closed
Wait for Need
To Cool
(Diff to Start)
9
9
9
9
9
9
///
/
/
/
/
/
/
/
/
2
2
2
2
2
/
/
/
/
/
2
2
2
2
2
0
0
0
0
0
1
1
1
1
1
2
2
2
2
2
-
-
-
-
1
1
1
1
1
0
0
0
0
0
/
/
/
/
/
2
2
2
2
2
/
/
/
/
/
2
2
2
2
2
0
0
0
0
0
1
1
1
1
1
2
2
2
2
2
Auto
9
/
3
/
2
2
0
0
1
1
(
(
2
2
a
s
s
d
f
Call for Cooling
(Differential to Start is met)
1
1
1
1
1
1
1
1
00
0
0
0
0
0
0
0
0
0
0
/
/
/
/
/
/
/
/
1
1
1
1
1
1
1
/
/
/
/
/
/
/
/
2
2
2
2
2
2
2
0
0
0
0
0
0
0
1
1
1
1
1
1
1
2
2
2
2
2
2
2
-
-
-
-
1
1
1
1
1
1
1
0
0
0
0
0
0
0
/
/
/
/
/
/
/
/
3
3
3
3
3
3
3
1
1
1
1
1
1
1
/
/
/
/
/
/
/
/
2
2
2
2
2
2
2
0
0
0
0
0
0
0
1111
1
1
2
Waiting
To Start
1
0
/
2
/
2
0
1
2
a
s
d
f
Confirm
Presence of Oil
(0 to 90 seconds)
1
1
1
1
1
1
1
0
0
0
0
0
0
0
/
/
/
/
/
/
/
/
3
3
3
3
3
3
3
0
0
0
0
0
0
0
/
/
/
/
/
/
/
/
2
2
2
2
2
2
2
0
0
0
0
0
0
0
1
1
1
1
1
1
1
2
2
2
2
2
2
2
-
-
-
-
1
1
1
1
1
1
1
2
2
2
2
2
2
2
/
/
/
/
/
/
/
/
1
1
1
1
1
1
1
1
1
1
1
1
1
1
/
/
/
/
/
/
/
/
2
2
2
2
2
2
2
0
0
0
0
0
0
0
1
1
1
1
1
1
1
2
2
2
2
2
2
2
Waiting
To Start
1
0
/
3
1
/
2
0
1
2
a
s
d
f
1
2
/
1
1
/
2
0
1
2
a
s
d
f
EXV m oving to
Preposition
0 to 25 Seconds
Send Start Command
to Lead Com pressor*
Transition to
Running
Start Control of
Condenser Fan Flow
Pre-Position EXV of
Lead Circuit
666
6
6
6
6
6
6
///
/
/
/
/
/
/
111
1
1
1
1
1
333
3
3
3
3
3
3
///
/
/
/
/
/
/
222
2
2
2
2
2
000
0
0
0
0
0
0
111
1
1
1
1
1
222
2
2
2
2
2
-
-
-
-
111
1
1
1
1
1
222
2
2
2
2
2
///
/
/
/
/
/
/
111
1
1
1
1
1
000
0
0
0
0
0
0
///
/
/
/
/
/
/
222
2
2
2
2
2
000
0
0
0
0
0
0
111
1
1
1
1
1
222
2
2
2
2
2
Check Evap Pressure for
Low Pressure Cutout
/
1
1
1
4
/
/
2
P
0
r
1
e
2
P
L
* Lead compressor (and its lead circuit) is
determined by staging algorithm - “Fixed Staging”
or “Balanced Wear” selection - also influenced by
lockouts, restart inhibit, or diagnostics present.
SSttaarrtt--uupp aanndd SShhuuttddoowwnn

Trane Ascend ACR Series Specifications

General

Brand	Trane
Model	Ascend ACR Series
Category	Chiller
Language	English