
SV2 Series Safety Shut-off Valves
67
V2F, V2V
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
13.5-14.5 Nm (120-128 in-lbf). The last step is to install and tighten the remaining screws, first on the top remaining slots
then second on the bottom remaining slots, tightening to the recommended torque.
NOTES:
• Ensure the gap left between the flanges when installed on the pipes does not exceed the valve body width otherwise the
valve piping may be over-stressed.
• Follow the flange and valve install instructions as outlined in the SV2 Series Valves Installation Instructions, 32-00018 or
the applicable flange kit installation instruction. The methodology is different for each valve body size.
• 1 ½ and 2 inch (DN40 and DN50) valves may require extra bracing due to their weight, depending on the application.
Replacement Electronics
Specifications
SOLENOID 1
PROOF OF CLOSURE
POC 1
POC 2
SOLENOID 2
MAINS
SUPPLY
L1 N
MAINS CHASSIS
GROUND
ILK ILK VPS POC MV2 MV1
OUT IN SW
CONTROL WIRING
RS-485
MODBUS
+
–
C
OFF
BIAS
TERMIN.
BIAS
ON
1
2
3
MODBUS
GND IN1 GND IN2
A
N
A
L
O
G
FIRE RATE O2 SENSOR
MOTOR
PRESSURE
FUEL/AIR
MCR35488A
Open
Closed
Self Test
Fault
LGP
HGP
Open
Closed
Reset
Open
Closed
Self Test
Fault
LGP
HGP
Open
Closed
Reset
MCR35487
SOLENOID 1
SOLENOID 2
L1 N
MAINS
SUPPLY
MAINS CHASSIS
GROUND
ILK ILK VPS POC MV2 MV1
OUT IN
RS-485
MODBUS
+
–
C
OFF
BIAS
TERMIN.
BIAS
ON
1
2
3
MODBUS
GND IN1 GND IN2
A
N
A
L
O
G
FIRE
RATE
O2
SENSOR
MOTOR
PRESSURE
FUEL/AIR
Models:
NEMA 1 / IP20 and NEMA 4 / IP66
Voltages: 24, 100-240VAC
Mounting:
Two (2) #6 x ¾ in Plastite® slotted Torx™ screws
Retaining tabs embedded into valve electrical enclosure
Documentation:
32-00039, Replacement Electronics Installation Instructions
Introduction and Replacement Assembly Selection
The SV2 Series valves were designed for application flexibility, including modular components that could be replaced in the
field, should the necessity occur, without replacing the entire valve. The internal valve electronics assembly can be field replaced.
Acting as the master control center, the electronics assembly contains customer line voltage inputs, wiring terminals to and
from the burner management system, Modbus connection and bias resistors as well as factory connections for the solenoids,
proof of closure switches, fuel/air module, pressure module and fuel/air modulating motor. Any intelligent features utilized are
programmed via the Modbus connection to the SV2 Series HMI or PC Tools. Intelligent features include valve Modbus a
communication speed, low gas pressure, high gas pressure, VPS (valve proving sequence), fuel/air ratio, leak detection sequence
and metering. Once programmed and verified, the electronics and internal software operate the valve as required.
Replacement electronics assembly part numbers are identified by ‘REL’, followed by the NEMA rating, the maximum voltage and
the valve intelligence (IQ) level. Each applicable replacement electronics assembly will work on all valve sizes and models as
indicated in
Table 14
.
As the various valve intelligence levels are released, the associated replacement electronics assemblies will also be released.