Dungs VPS 504 Installation Manual

VPS 504
Installation Manual
The Valve Proving System VPS 504 checks that both safety shutoff valves in a DMV 700 combustion gas train are fully
closed before either a system start-up or after shutdown when wired and interlocked with a suitable flame monitoring
relay as shown in the wiring diagrams on page 2. The VPS 504 will halt the start-up sequence to a burner if it detects an
open safety shutoff valve, thus preventing ignition under dangerous conditions.
Gas
natural gas, propane, noncorrosive gases, and air
Maximum Operating Pressure
7 psi
Electrical Rating
120 Vac / 60 Hz
Power Consumption
during pump period 60 VA
during standby 17 VA
Contact Rating
Run T5: 4 A res, 2 FLA @ 120 Vac / 60 Hz
Alarm T3: 1 A res, 0.5 FLA @ 120 Vac / 60 Hz
Enclosure
NEMA 12
Ambient/Fluid Temperature
5° F to 140° F
Materials in Contact with Gas
housing:
rubber components:
l Read these instructions carefully.
l Failure to follow them and/or improper installa-
tion may cause explosion, property damage and
injuries.
l Installation must be done with the supervision of
a licensed burner technician.
l The system must meet all applicable national and
local code requirements.
l Check the ratings given in the specifications and
on the Valve Proving System to make sure that it is
suitable for your application.
Location
The VPS 504 can be mounted directly to the DMV 700 ports
1 & 2.
Mounting Holes
SPECIFICATIONS
cast aluminum
NBR-based rubber
INSTALLATION
DMV
Port 2
Port 1
Karl Dungs Inc.
Controller Duty Factor
100% duty cycle
maximum 20 test cycles / hour
Test Volume
less then 0.14 cft
Test Period
~10 sec. for test volume < 0.5 cft
> 10 sec. for test volume > 0.5 cft
maximum test period = 26 seconds
Maximum Allowable Leakage Under Worst Case
Conditions
1 cft / hour
Mounting Position
upright vertical to horizontal
Approvals
UL Recognized Component: File No. MH 17004, Guide
No. MJAT2
l Never perform work if gas pressure or power is
applied, or in the presence of an open flame.
l Protect surfaces. Make sure that seals and O-
rings are clean and in good condition.
l Once installed, perform a complete checkout in-
cluding a gas leak test.
l Label all wires prior to disconnection when ser-
vicing VPS 504. Wiring errors can cause improper
and dangerous operation.
l Verify proper operation after servicing.
Mounting
The gas supply must be shut off and the DMV 700 series
valve must be de-energized before mounting the VPS 504.
Disconnect all power to the valves and the valve proving
system before beginning to prevent electrical shock and
equipment damage.
Recommended Mounting Procedure
• Use the M 4 x 15 mm self tapping socket head screws
supplied with the VPS 504 to cut the threads in the 4
predrilled holes in the side of the DMV valve body at the
desired mounting position.