ONICON System-10 BTU - Manual (Page 17)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727) 442-5699 • [email protected]
System-10 BTU Meter Manual 03/15 - 0651-16 / 18323 Page 17
OPERATING FROM 24 VAC POWER
IMPORTANT NOTE
This option is not field selectable. Contact ONICON if you need to change the input voltage rating.
i
The SYSTEM-10 BTU Meter can be configured to operate from 24 ±4 V 50/60 Hz power.
Connect the 24 volt power source to the System-10 using the pre-drilled conduit or strain
relief opening located at the bottom of the enclosure. Do not connect the 24 volt source
until all signal connections have been made and verified. Connect 24 VAC wires to the
appropriate screw terminals as shown. Connect the protective earth wire as shown. Do not
exceed 13 in-lb (1.5 Nm) of torque when tightening.
As power is initially applied to the System-10, immediately confirm that the power light is
illuminated and the display is scrolling through the character diagnostic test. The test will
begin by indicating the letter P in every position followed by a countdown from 9 to 0 for
each digit. If this does not occur, disconnect power immediately and re-verify all wiring
connections. Contact ONICON if the problem persists.
!
J1
5
G 60 HZ
1
J2-1
+15 +24
J2-12
G G
10
R7
H3
R1
20075-50 REV. A
LED1
T1
D1
D2
VAR1
F1
TB1
D4
D3
H1
1
R1
20075-50 REV. A
F1
TB1
3/4 AMP
3/4 AMP
L1 N
Not Used
L1 N Not Used
CAUTION
This product must be connected to earth ground for proper operation. Failure to do so may result
in erratic operation.
Protective Earth
Ground