Sheet 1597-5 Page 2
• Make sure the O-rings are clean and in good condition. • Remove the G 1⁄8 plugs from the port 1 and port 1 of the valve with a 3 mm hex key wrench. • Make sure that the surface is clean and in good condition. If neces- sary clean the surfaces. • Mount the Valve Proving Device onto the ports using the M4 15 mm socket head screws. • Make sure that the O-rings are located in the grooves. • Tighten the screws snugly, not exceeding 22 lb-in. • Perform a leak test to verify that no leakage occurs around the O- rings. • Disconnect all power to the Valve Proving Device before beginning the wiring to prevent electrical shock and equipment damage. • All wiring must comply with local electrical codes, ordinances, and regulations.
L2
L1
Main Power 120 Vac 60 Hz
VPS 504
N
L1
ALARM
T3
Alarm
RUN
1CR
T5
Flame Safeguard
Blower
Burner Start
1CR1
Low Gas
High Gas
Pilot Valve
L1
SSOV
Alarm
Air
Diagram 1 Typical Wiring with VPS 504 Test on Start-up
• CAUTION : Frequency converters with insufficient shielding can cause faults in the Valve Proving Device as the result of transients. Make sure that the equipment is provided with sufficient shielding.
Black Cap
Gray Cover
Port 2
Port 1
O-ring
Test Port 3
Test Port 4
WIRING
• Do not exceed the terminal ratings given in the specifications and on the Valve Proving Device. • Remove the black cap on top of the Valve Proving Device. • Loosen the screw which secures the gray cover. • Remove the cover. • Route the wires through the conduit connector. • Connect the wiring to the appropriate screw terminals on the terminal strip. • Replace the gray cover, the screw, and the black cap. A typical wiring diagram for operating the Valve Proving Device on burner start-up only is shown in diagram 1. • A typical wiring diagram for operating the Valve Proving Device on burner start-up and shutdown is shown in diagram 2. The interface equipment (1CR, 2CR, 3CR, 1TD, 2TD), the flame safe- guard and auxiliary equipment shown in the wiring diagrams are customer supplied.
Diagram 2 Typical Wiring with VPS 504 Test on Start-up and Shut-down
required if resetting the flame safeguard in an alarm dœs not de-energize 1CR
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