Trane Tracer TD7 User Guide

RLC-
S
VU006A-E
4
1
1
The following equations apply for EDLS:
Volta
g
e Si
g
na
l
Current Si
g
nal
As
g
enerated from
external sourc
e
VDC+0.133*
(
%
)
-6.
0
mA=0.266*
(
%
)
-12.
0
As processed by
U
C
M
%=7.5*(VDC)+45.
0
%=3.75*(mA)+45.
0
If the EDLS input develops an open or short, the LLID
will report either a very high or very low value bac
k
to
the man processor. This will generate an in
f
ormational
diagnostic and the unit will de
f
ault to using the Front
Panel
(
Tracer TD7
)
Current Limit Setpoint
.
The Tracer™ TU
S
ervice T
oo
l must be used t
o
set the
input si
g
nal type
f
rom the
f
actory de
f
ault o
f
2-10 VDC to
that
of
4-20 mA current. Tracer TU must be als
o
be used
to install or remove the External Demand Limit
S
etpoint
O
p
tion for fi eld installation, or can be used to enable or
disable the feature
(
if installed
)
.
EDL
S
and ECW
S
Analo
g
Input
S
i
g
nal Wirin
g
Details
:
Both the ECW
S
and EDL
S
can be connected and setup
as either a 2-10 VDC (factor
y
default), 4-20 mA, or
resistance input
(
also a form of 4-2OmA
)
as indicated
b
elow.
D
ependin
g
on the type to
b
e used, the
T
racer
TU
S
ervice Tool must be used to confi
g
ure the LLID and the
MP for the proper input type that is bein
g
used. This is
accomplished by a setting change on the Custom Tab o
f
the Confi
g
uration View within Tracer TU.
Important:
For proper unit operation, BOTH the EDLS
:
a
nd ECW
S
settin
g
s MU
S
T be the sam
e
(
2-10 VDC or 4-20mA), even if only on
e
i
nput is to
b
e used.
T
he
J
2-3 and
J
2-6 terminal is chassis grounded and
terminal J2- 1 and J2-4 can be used to source 12 VD
C
.
The ECL
S
uses terminals J2-2 and J2-
3
. ECW
S
uses
terminals
J
2-5 and
J
2-6.
B
oth inputs are only compati
b
le
with high-side current sources.
Figure 2. Wiring examples for EDLS and ECWS
J2-1 & 4 Dual
J2-2 & 5 Analog
J2-3 & 6 I/O LLID
J2-1 & 4 Dual
J2-2 & 5 Analog
J2-3 & 6 I/O LLID
J2-1 & 4 Dual
J2-2 & 5 Analog
J2-3 & 6 I/O LLID
Resister
2-10 VDC, 4-20mA
I = 20/(R + 200)
I
Chilled Water Reset (CWR
)
U
C800 resets the chilled water tem
p
erature set
p
oint
based on either return water tem
p
erature, or outdoor air
tem
p
erature. Return Reset is standard, Outdoor Reset is
optional.
The following shall be selectable:
•
O
ne of three Reset Types: None, Return Water
Temperature Reset,
O
utdoor Air Temperature Reset, or
C
onstant Return Water Temperature Reset.
•
Reset Ratio Set Points
.
For outdoor air tem
p
erature reset there shall be both
p
ositive and ne
g
ative reset ratio’s
.
•
Start Reset Set Points
.
•
Maximum Reset
S
et Points.
The equations
f
or each type o
f
reset are as
f
ollows:
R
eturn
CWS’ = CWS + RATIO
(
START RESET -
(
TWE - TWL
))
a
nd CW
S
’ > or = CW
S
a
nd CW
S
’ - CW
S
< or = Maximum Reset
O
utd
oo
r
CWS’ = CWS + RATIO *
(
START RESET - TOD
)
a
nd CW
S
’ >
o
r = CW
S
a
nd CW
S
’ - CW
S
< or = Maximum Reset
wh
e
r
e
CWS’ is the new chilled water set point or the “reset
CW
S
”
CW
S
is the active chilled water set
p
oint before any reset
h
as occurred, e.g. normally Front Panel, Tracer, or ECW
S
RESET RATI
O
is a user adjustable gain
S
TART RE
S
ET is a user adjustable reference
T
O
D is the outdoor temperature
TWE is enterin
g
evap. water temperature
TWL
is leaving evap. water temperature
MAXIMUM RESET is a user adjustable limit providing
the maximum amount of reset. For all types of reset,
CW
S
’ - CW
S
<
o
r = Maximum Reset.
R
an
ge
I
ncrement
R
e
s
et
Typ
e
R
e
s
et
R
ati
o
S
tart
R
e
s
et
M
ax
R
e
s
et
IP
U
nit
s
SI
U
nit
s
F
actor
y
D
efa
u
lt
R
et
u
rn
10
t
o
120
%
4
t
o
30
F
0
t
o
20
F
1
%
1
%
50
%
(
2.2 to
1
6.7 C
)
(
0.0 to
1
1.1 C
)
Ou
t
doo
r
8
0 to
-
80%
50
t
o
130
F
0
t
o
20
F
1
%
1
%
10
%
(
10 to
54.4 C
)
(
0.0 to
1
1.1 C
)
I
nstallation El
e
ctrical

Trane Tracer TD7 Specifications

General

Brand	Trane
Model	Tracer TD7
Category	Controller
Language	English