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IMPORTANT
• Use only flexible conduit with the SV2 Series valve NEMA 4 / IP66 enclosures
• Wiring must comply with all applicable electrical codes, ordinances and regulations.
• Wiring must comply with NEC Class 1 (line voltage) wiring.
• Use lead wire which can withstand 90°C (194°F) ambient temperatures.
• Voltage and frequency of the power supply connected to this control must agree with those marked on the device.
• Loads connected to the VPS (valve proving sequence) Switch and/or POC (proof of closure) contacts, if used, must not
exceed the ratings given in Table 6 in the SV2 Series Safety Shut-Off Valves installation instructions, document 32-00018.
• Separate line and low voltage to avoid signal interference. If using conduit, run line voltage and low voltage wiring in
separate conduit.
Removal of Original Electronics Assembly
1.
Ensure that:
a. The line voltage has been removed from the valve.
b. The gas supply is turned off and that the manual safety shut-off valve(s) are closed.
2.
Remove the valve front electrical enclosure retaining screws with the appropriate tool to access
the customer wiring terminals.
3.
Make note of the following:
a. Solenoid connector and proof of closure connector arrangement (if applicable) relative to:
i. SOLENOID 1/2 and POC 1/2 markings on the electrical assembly. Refer to Fig. 2.
ii. Gas flow directional arrow plus valve seat 1/2 markings embedded in valve casting.
b. Modbus BIAS / TERM. / BIAS resistor settings.
NOTE: For detailed information regarding terminal usage, wiring and ratings, refer to the SV2 Series Safety Shut-Off
Valves Installation Instructions, document 32-00018.
4.
Disconnect all applicable connectors from their sockets inside the main valve electrical enclosure. Refer to Fig. 2.
MAINS
SUPPLY
GROUND
L1
N
MAINS CHASSIS
Fig. 2.
NEMA 4 / IP66 STANDARD (6) or ENHANCED (7) electronics interface.
5.
Remove the electronics assembly retaining screws with the appropriate tool.
6.
Remove the original electronics assembly by first lifting the top portion and then sliding the assembly upward to remove
it from the retaining slots.
7.
Properly dispose of the original electronics assembly.
SV2 Series Replacement Electronics
REL4NxxxVxQ, REL1NxxxVxQ
CONTROL WIRING
ILK ILK VPS POC MV2 MV1
OUT IN SW
LGP
Open
Fault
Self Test
Closed
SV2 SERIES REPLACEMENT ELECTRONICS INSTALLATION INSTRUCTIONS
SOLENOID 1
SOLENOID 2
HGP
Open
Reset
Closed
GND IN1 GND IN2
MOTOR
FUEL/AIR
PRESSURE
FIRE RATE O2 SENSOR
3
PROOF OF CLOSURE
POC 1
POC 2
RS-485
MODBUS
+
–
C
MODBUS
OFF
ON
BIAS
1
TERMIN.
2
BIAS
3
A
N
A
L
O
G
MCR35488A
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