Trane CVRE User Manual

Installation
CDUB-SVN002B-EN 19
High Accuracy, Customer Meter Option
The high accuracy customer meter option provides an
analog input/output LLID to monitor a customer provided
high accuracy meter 0-10 Vdc or 4 – 20 mA outputs.
(Rosemont, etc.) This option allows monitoring of
condenser, evaporator flow and auxiliary heat
exchangers.
Install needed DAIO LLID(s) (
BRD04875) in CVRF control
panel
1. LLID (1A21) is needed for EVAP
and COND
water flow.
Connect flow meter wires to 1A21-J2-1 and 1A21-J2-1
for EVAP, 1A21-J2-4 and 1A21-J2-5 for COND.
2. LLID (1A28) is need for HR
Aux/COND wa
ter flow.
Connect flow meter wires 1A28-J2-1 and 1A28-J2-1 for
HR flow or Aux COND.
High accuracy, customer meter f
l
ow meter wiring, ref.
50712795, 50712799, 50712802, 50712805 or 50712806
depend on different unit. For details, see Table 3, p. 27.
Figure 27. Schematic of flow meter option
1A21 DUAL ANALOG I/O
OPTIONAL
INPUT 1
OUTPUT 1
2
1
GND
INPUT 2
OUTPUT 2
GND
4
3
J2
5
6
COND FLOW METER
5B2 CUSTOMER PROVIDE
4-20mA
FLOW
METER
OUTPUT
EVAP FLOW METER
5B1 CUSTOMER PROVIDE
SIGNAL
24VDC
1A2 J3-1
0V
4-20mA
FLOW
METER
24VDC
1A1 J3-1
0V
1A2 J3-2
1A1 J3-2
OUTPUT
SIGNAL
WATER PRESSURE
EVAP ENTERING
OPTIONAL
TRANSDUCER
WATER PRESSURE
EVAP LEAVING
OPTIONAL
TRANSDUCER
WATER PRESSURE
COND ENTERING
OPTIONAL
TRANSDUCER
WATER PRESSURE
COND LEAVING
OPTIONAL
TRANSDUCER
IPC BUS
AND WATER FLOW DETECTION
EVAP/COND FLOW METER
DIFFERENT PRESSURE
4B2 COND WATER
4-20mA
PRESSURE
TRANSDUCER
DIFFERENT PRESSURE
4B1 EVAP WATER
BRN
GRN
4-20mA
PRESSURE
TRANSDUCER
BRN
GRN
INPUT 1
OUTPUT 1
2
1
GND
INPUT 2
OUTPUT 2
GND
4
3
J2
5
6
1A21 DUAL ANALOG I/O
OPTIONAL
IPC BUS
4
4
RED
J11
1
J1
1
EVAP/COND WATER FLOW METER
CUSTOMER PROVIDE 4-20MA INPUT
-
Pg
+
SIG
4B1
-
Pg
+
SIG
4B2
-
Pg
+
SIG
4B3
-
Pg
+
SIG
4B4
DIFFERENT PRESSURE INPUT
2
Figure 28. Schematic of high accuracy meter option

Trane CVRE Specifications

General

Brand	Trane
Model	CVRE
Category	Controller
Language	English