Dekker Vmax User manual

Installation
Operation
and
Maintenance
Manual
Oil-sealed
liquid ring vacuum pump systems
SERIAL NO.:___________________________ June, 2006/13

OIL-SEALED LIQUID RING VACUUM PUMP SYSTEMS
TABLE OF CONTENTS
INTRODUCTION 3
Safety 3
STORAGE 3
INSTALLATION 3
Unpacking 3
Lifting 3
Location 3
Mounting 3
Ventilation 4
Electrical preparation 4
Vmax-VFD operational instructions 5
Vmax-VFD value chart 6
Pipe connections and sizing 7
Inlet piping 7
Discharge piping 7
Cooling water piping (water-cooled systems only) 7
THEORY OF OPERATION 8
START-UP PROCEDURES 8
SHUT-DOWN PROCEDURES 10
SEQUENCE OF OPERATION 10
SYSTEM ALARM CONDITIONS 11
MAINTENANCE 11
Bearing lubrication – Pump 11
Bearing lubrication – Motor (where required) 12
Inlet filter 13
Seal fluid 13
Devarnishing 13
Seal fluid strainer 13
Spin-on oil filter (if installed) 14
Separator element 14
Separator element oil return line 14
Mechanical shaft seals 14
MAINTENANCE SCHEDULE 14
ELECTRICAL CONTROLS 15
ACCESSORIES AND PROTECTIVE DEVICES 16
Accessories 16
Protective devices 19
TROUBLE SHOOTING 20
Trouble shooting guide 20
CUSTOMER SERVICE AND INFORMATION 22
Order information 22
WARRANTY POLICY 23
Dekker Vacuum Technologies, Inc. – Vmax/13 2

INTRODUCTION
The Vmax oil-sealed liquid ring vacuum pump system have been designed to give you safe, reliable trouble-free
service, provided some of the basic maintenance guidelines as set out in this manual are followed. Compared
with other vacuum pump systems the Vmax oil-sealed liquid ring vacuum pump system offers the advantages of
no metal-to-metal contact between the impeller and casing. Grease lubricated bearings are mounted external to
the pumping chamber, isolated by mechanical shaft seals. This means that the pump requires no internal
lubrication. However, a vacuum pump is a rotating piece of equipment and operators must exercise good
judgment and follow proper safety procedures to avoid damage to the equipment or personal injury. Please
review and follow all instructions in this manual before attempting to install, start or operate equipment.
Safety
All products offered by DEKKER have been designed and manufactured for safe operation. However, the
responsibility for safe operation rests with those who use and maintain these products. Your safety department
should establish a safety program based on OSHA, federal, state and local codes. It is important that due
consideration be given to hazards which arise from the presence of electrical power, hot liquids, toxic gases and
rotating equipment. Proper installation and care of protective devices is essential to safe system operation. These
safety procedures are to be used in conjunction with the instructions contained in this manual.
STORAGE
Keep the system in a cool dry environment and close the seal fluid isolation valve. Plug all open ports to keep
out dirt and foreign objects. Every 2 - 3 months rotate the impeller by rotating the shaft by hand.
INSTALLATION
The design of the piping system, foundation layout and plant location are the responsibility of the purchaser.
Dekker Vacuum Technologies, Inc. and its representatives may offer advice but cannot assume responsibility for
operation and installation design.
Please consult an authorized dealer or a specialist skilled in the design of plant layout, system piping design and
foundation design. The installer should carefully read this manual before installing the equipment. DEKKER or
your local dealer can provide start up assistance in most instances at reasonable cost.
Unpacking
Upon receipt of pump or system, immediately inspect for signs of damage. Carefully remove packing or
crating from around pump or system. Be sure to keep equipment in upright position. DEKKER products ship
F.O.B. factory, which means that any damage is the responsibility of the carrier and should be reported to them.
Lifting
Lift the equipment carefully and with weight evenly distributed. DEKKER is not responsible for equipment that has
been damaged through mishandling or dropping.
Location
Install the unit in a well ventilated and dust free area. The pump or system should be a minimum distance of 3
feet from surrounding walls to allow for checking fluid level, temperatures, pressures and general servicing.
Mounting
The pump or system must be installed on a level surface in a horizontal position. The foundation must be
designed to support the total unit weight, without any settlement or crushing, be rigid and substantial
enough to absorb any equipment vibration, maintain true alignment with any drive mechanism, and must
permanently support the system baseplate at all points. The vacuum system must be leveled and secured
with foundation bolts. Foundation bolts must be of adequate size to withstand the mechanical stresses
exerted on it.
Systems larger than 40 HP should also be grouted into position. The foundation should be constructed to
allow for ¾ to 1-½ inch of grout. The baseplate is set on shims and the grout is poured between the
foundation and the baseplate. To have the required body to support the baseplate, grout should be at least
¾ inch thick.
The number and location of shims will be determined by the design of the baseplate. Firm support should
be provided at points where weight will be concentrated at the anchor bolt locations. Use enough, and large
enough shims to provide rigid support. Baseplates are usually designed with openings to allow pouring
grout. When the baseplate has been shimmed and leveled and the anchor bolts have been snugly
tightened, a dam is constructed around the foundation to contain the grout. The dam level should be at
least ½ inch above the top surface of the shims. Grout should be poured inside and around the outside of
the baseplate and leveled. Allow the grout to dry for a minimum of 48 hours before tightening the anchor
bolts.
Please note that the pump/motor coupling and V-belt units will need to be realigned prior to start-
up, except with monoblock units.
Dekker Vacuum Technologies, Inc. – Vmax/13 3

Ventilation
Locate the vacuum system in an area with sufficient airflow and accessibility. To prevent excessive
ambient temperature rise it is imperative to provide adequate ventilation. Cooling is an important aspect of
reliable equipment operation and it is therefore important to install the unit in a reasonably cool area where
the temperature does not exceed 110°F (43°C). For higher ambient temperatures contact the factory.
For water-cooled vacuum systems it is necessary to check cooling water supply. A proper, consistent
water flow must be maintained for adequate cooling.
Electrical Preparation
All system wiring is performed at the factory if a control panel is supplied. Check area classification to
ensure all electrical enclosures comply to code. Required customer wiring is minimal, but should be done
by a qualified electrician in compliance with OSHA, National Electric Code and any other applicable local
electrical code concerning switches, fused disconnects, etc. DEKKER includes a wiring diagram in the
control panel for use by the installer. DEKKER recommends that a main disconnect switch be fitted
between the vacuum system and the incoming power.
Wire Size Chart
(
AWG
)
b
y
Vmax Horse
p
ower
Recommended Wire Size and Disconnect Size for Vmax S
y
stems
Vmax
System
Serv Full Load Amperage at Volt. Copper AWG (kcmil) Recommended Conduit
Size in Inches Recommended Disconnect (Amps) Recommended Class J Fuse
Model No. HP Fact 200V 230V 460V Tol. 200V 230V 460V 200V 230V 460V 200V 230V 460V 200V 230V 460V
VMX0023MA1 1.5 1.15 4.0 2.0 ±13%
VMX0023KA1 1.5 1.15 3.8 1.9 ±10% 15 15 9 5
VMX0036MA1 3 1 7.8 3.9 ±13%
VMX0036KA1 3 1.15 7.2 3.6 ±10%
14
25 15 17.5 8
VMX0063MA1 5 1.15 14.4 7.2 ±13%
VMX0063KA1 5 1.4 13.8 12.0 6.0 ±10%
VMX0083MA1 5 1.15 14.4 7.2 ±13% 40 20 25 15
VMX0083KA1 5 1.4 13.8 12.0 6.0 ±10%
10
40 40 20 30 25 15
VMX0103MA1 7.5 1 18.8 9.4 ±13% 8 60 35 40 20
VMX0103KA1 7.5 1.3 22.0 19.0 9.5 ±10% 10 60 60 35 40 35 20
VMX0153MA1 10 1 24.8 12.4 ±13% 8 60 35 45 25
VMX0153KA1 10 1.28 27.6 24.0 12.0 ±10% 10
1/2"
70 60 35 50 45 25
VMX0203KA1 15 1.3 45.0 39.0 19.5 ±10% 6 3/4" 100 100 60 80 70 35
VMX0303KA1 20 1.25 58.4 50.8 25.4 ±10% 125 110 60 100 90 45
VMX0303KA1-20 20XP 1.15 50.8 25.4 ±10% 4 1”
VMX0453KA1 25 1.3 74.6 62.0 31.0 ±10%
VMX0453KA1-20 25XP 1.15 83.0 72.2 36.1 ±10% 2 1-1/4”
150 150 70 125 110 60
VMX0553KA1 40 1.3 114.0 99.0 49.5 ±10% 00 4 1-1/4” 1” 200 200 100 200 175 90
VMX0553KA1-20 40XP 1.15 142.3 123.4 61.9 ±10%
VMX0753KA1 50 1.28 142.3 123.8 61.9 ±10% 4 1” 250 225 150 250 200 100
VMX1003KA1 60 1.15 169.7 146.8 73.4 ±10%
000 00
2
2” 1-1/4”
300 250 150 300 250 125
VMX1103KA1 75 1.15 200.0 174.0 87.0 ±10% 250 0000 2 350 300 150 350 300 150
VMX1203KA1 100 1.15 266.8 232.0 116.0 ±10% 400 350 0
2-1/2”
1-
1/2
” 450 400 200 450 400 200
NOTES: 1. Based on no more than three single insulated conductors rated 0-2000 volts.
2. Conduit sizes shown does include ground conductor if required (over 60 amperes).
3. Wire sizes are based on THHN 75 deg. C rated conductors.
4. Approved trade size conduit or metal tubing.
5. Motors with voltage tolerance of +/-13% have a voltage range of 200-260V, and 400-520V. Use the disconnect and fuse corresponding to the 230V or 460V range
6. Above information is general information. Please confirm actual motor full load amperage before proceeding.
After the electrical wiring connections are completed, check the incoming voltage to make sure that the incoming
voltage is the same as the vacuum system voltage. Line voltage should be within the voltage tolerance as
specified on the motor. Check the system for proper motor rotation. The direction of rotation is always clockwise
when looking at the shaft of the pump and is marked by an arrow on the motor or pump housing. Jog the motor
by pressing the START button, and then the STOP button. If the rotation is incorrect switch any two of the three
main power leads on the contactor inside the control panel. Failure to do so could result in serious equipment
damage.
WARNING: Install, ground, and maintain equipment in accordance with the National Electrical Code
and all applicable federal, state and local codes.
WARNING: For NFPA 99 hospital and generator applications: please shut down the vacuum pumps
prior to generator testing. The rapid stop and restart may cause damage to the pump and/or motor.
Dekker Vacuum Technologies, Inc. – Vmax/13 4

Vmax-VFD Operational Instructions
Some systems are equipped with a Variable Frequency Drive (VFD) with an Operator Interface Module
(OIM) remote keypad.
Following are brief general instructions and charts. Please refer to Vmax-VFD system-specific
operation instructions included with each Vmax-VFD system.
On systems with a VFD, remember to open the seal fluid valve located under the separator tank before
startup. Upon power up of the system, the VFD will go thru an initial self-check, and the remote OIM will
display the main menu.
There are two custom windows that will display on the OIM (Operator Interface Module) screen by pressing
the ESC/PROG button on the keypad. The first screen shows three items, the first item is total run hours
that the motor has run, second is Torr set point (vacuum level set point) and finally Torr feed back (vacuum
level pump is at) (Torr (mmHg) = 760 – (“HgV x 25.4). When you press F3 again, the second screen shows
HP (horse power), AMPS, and Hz (Hertz). Pressing F3 again will bring you back to the first display screen.
The High Temperature light will be on. You must push the Alarm Condition Reset button before you can
place the system in the required mode of operation.
In Manual Mode, the system will run at a constant RPM. In Auto Mode, the system will monitor a set point
that the operator sets. The vacuum set point for the system is achieved by using the Operator Interface
Module (OIM) on the front door of the control panel (some models may have the OIM inside the front door
of the panel). Using the up and down arrows on the keypad, a window will pop up displaying the (% OIM
Ref). By pressing the up or down arrow key, the % value will increase or decrease to the required
percentage of the transducer output signal (preset to 26.33% = 22” HgV).
The VFD chart on the next page gives you the % VFD value that is associated with the transducer voltage
which then correlates to a vacuum level. The VFD will maintain the vacuum level at the set point by
increasing or decreasing the RPM of the motor. To verify whether the VFD is in Auto or Manual mode, look
in the upper right-hand corner of the screen. If it is in Manual mode it will display Man, and if it is in Auto
mode it will display Auto. To change the desired mode, press the F1 button in the main menu screen.
All system wiring is performed at the factory. Check area classification to ensure all electrical enclosures
comply to code. Required customer wiring is minimal, but should be done by a qualified electrician in
compliance with OSHA, National Electric Code and any other applicable local electrical code concerning
switches, fused disconnects, etc. DEKKER includes a wiring diagram in the control panel for use by the
installer. DEKKER recommends that a main disconnect switch be fitted between the vacuum system and
the incoming power.
Wire Size Chart
(
AWG
)
b
y
Vmax-
V
FD Horse
p
ower
Recommended Wire Size and Disconnect Size for Vmax-
V
FD S
y
stems
Vmax-VFD
System Serv.
Full Load Amperage at Volt. Copper AWG (kcmil) Recommended Conduit Size in Inches Recommended Disconnect (Amps) Recommended Class J Fuse (Amps)
Model No. HP Fact. 230V 460V Tol. 230V 460V 230V 460V 230V 460V 230V 460V
VMX-VFD0063KA1 5 1.0 12.0 6.0 ±10% 12 16 20 15 15 10
VMX-VFD0083KA1 5 1.0 12.0 6.0 ±10% 12 16 20 15 15 10
VMX-VFD0103KA1 7.5 1.0 19.0 9.5 ±10% 10 14 30 20 25 15
VMX-VFD0153KA1 10 1.0 24.0 12.0 ±10% 10 12
½”
35 25 30 20
VMX-VFD0203KA1 15 1.0 39.0 19.5 ±10% 8 10 ¾” 60 30 50 25
VMX-VFD0303KA1 20 1.0 50.8 25.4 ±10% 6 10 60 35 60 30
VMX-VFD0453KA1 25 1.0 62.0 31.0 ±10% 4 8 1” 80 40 70 35
VMX-VFD0553KA1 40 1.0 99.0 49.5 ±10% 1 6 125 70 125 60
VMX-VFD0753KA1 50 1.0 123.0 61.9 ±10% 1/0 4 1-1/4” 150 80 150 70
VMX-VFD1003KA1 60 1.0 146.8 73.4 ±10% 2/0 4
1” 200 100 175 90
VMX-VFD1103KA1 75 1.0 174.0 87.0 ±10% 3/0 2 2” 200 100 200 100
VMX-VFD1203KA1 100 1.0 232.0 116.0 ±10% 250 1 2-1/2” 1-1/4” 250 150 250 125
NOTES: 1. Based on no more than three single insulated conductors rated 0-2000 volts.
2. Conduit sizes shown does include ground conductor if required (over 60 amperes).
3. Wire sizes are based on THHN 75 deg. C rated conductors.
4. Approved trade size conduit or metal tubing.
5. Use the disconnect and fuse corresponding to the 230V or 460V range
6. Above information is general information. Please confirm actual motor full load amperage before proceeding.
Dekker Vacuum Technologies, Inc. – Vmax/13 5

V
FD value , transducer voltage and vacuum level chart
VFD
Value %
Transd.
Voltage Vac.lvl. Torr Vac.lvl. "HgV VFD Value % Transd. Voltage Vac.lvl. Torr Vac.lvl. "HgV
10.00 1.00 0.00 29.92 56.00 5.60 349.60 16.16
11.00 1.10 7.60 29.62 57.00 5.70 357.20 15.86
12.00 1.20 15.20 29.32 58.00 5.80 364.80 15.56
13.00 1.30 22.80 29.02 59.00 5.90 372.40 15.26
14.00 1.40 30.40 28.72 60.00 6.00 380.00 14.96
15.00 1.50 38.00 28.42 61.00 6.10 387.60 14.66
16.00 1.60 45.60 28.12 62.00 6.20 395.20 14.36
17.00 1.70 53.20 27.83 63.00 6.30 402.80 14.06
18.00 1.80 60.80 27.53 64.00 6.40 410.40 13.76
19.00 1.90 68.40 27.23 65.00 6.50 418.00 13.46
20.00 2.00 76.00 26.93 66.00 6.60 425.60 13.16
21.00 2.10 83.60 26.63 67.00 6.70 433.20 12.87
22.00 2.20 91.20 26.33 68.00 6.80 440.80 12.57
23.00 2.30 98.80 26.03 69.00 6.90 448.40 12.27
24.00 2.40 106.40 25.73 70.00 7.00 456.00 11.97
25.00 2.50 114.00 25.43 71.00 7.10 463.60 11.67
26.00 2.60 121.60 25.13 72.00 7.20 471.20 11.37
27.00 2.70 129.20 24.83 73.00 7.30 478.80 11.07
28.00 2.80 136.80 24.53 74.00 7.40 486.40 10.77
29.00 2.90 144.40 24.24 75.00 7.50 494.00 10.47
30.00 3.00 152.00 23.94 76.00 7.60 501.60 10.17
31.00 3.10 159.60 23.64 77.00 7.70 509.20 9.87
32.00 3.20 167.20 23.34 78.00 7.80 516.80 9.57
33.00 3.30 174.80 23.04 79.00 7.90 524.40 9.28
34.00 3.40 182.40 22.74 80.00 8.00 532.00 8.98
35.00 3.50 190.00 22.44 81.00 8.10 539.60 8.68
36.00 3.60 197.60 22.14 82.00 8.20 547.20 8.38
37.00 3.70 205.20 21.84 83.00 8.30 554.80 8.08
38.00 3.80 212.80 21.54 84.00 8.40 562.40 7.78
39.00 3.90 220.40 21.24 85.00 8.50 570.00 7.48
40.00 4.00 228.00 20.94 86.00 8.60 577.60 7.18
41.00 4.10 235.60 20.64 87.00 8.70 585.20 6.88
42.00 4.20 243.20 20.35 88.00 8.80 592.80 6.58
43.00 4.30 250.80 20.05 89.00 8.90 600.40 6.28
44.00 4.40 258.40 19.75 90.00 9.00 608.00 5.98
45.00 4.50 266.00 19.45 91.00 9.10 615.60 5.68
46.00 4.60 273.60 19.15 92.00 9.20 623.20 5.39
47.00 4.70 281.20 18.85 93.00 9.30 630.80 5.09
48.00 4.80 288.80 18.55 94.00 9.40 638.40 4.79
49.00 4.90 296.40 18.25 95.00 9.50 646.00 4.49
50.00 5.00 304.00 17.95 96.00 9.60 653.60 4.19
51.00 5.10 311.60 17.65 97.00 9.70 661.20 3.89
52.00 5.20 319.20 17.35 98.00 9.80 668.80 3.59
53.00 5.30 326.80 17.05 99.00 9.90 676.40 3.29
54.00 5.40 334.40 16.76 100.00 10.00 684.00 2.99
55.00 5.50 342.00 16.46
Dekker Vacuum Technologies, Inc. – Vmax/13 6

Pipe Connections and Sizing
Before installation, remove all protective inserts on the pump suction and discharge. Piping connected to
the system must be installed without imposing any strain on the system components. Improperly installed
piping can result in misalignment, general operating problems and pump failure. Use flexible connectors
where necessary. Piping must be cleaned of debris before installation.
Inlet Piping
Note: Install a temporary screen at the pump inlet flange at first start-up to protect the unit against
carry over of pipe debris and welding slag. The screen must be removed after the initial run in
period.
Inlet piping should be at least the size of the pump inlet. Install the system as close as possible to the
process to minimize losses due to the length of the suction line. If the system has to be installed further
away from the process, be sure that the inlet piping is oversized accordingly to minimize the overall line
pressure drop. For more information consult your dealer or call the factory.
Pump systems operating in parallel on a common manifold must each have a manual or automatic shut-off
valve and a suitable check valve installed in the suction line close to the pump suction flange. This allows
each individual system to be isolated when it is not in operation. The line size of the manifold should be a
minimum equal to the sum of the individual system pipe areas.
Vmax systems are supplied with an inlet check valve as standard. This valve provides a minimum of
resistance close to the pump suction flange to prevent back flow of process gas and seal fluid when the
pump is stopped.
If the inlet gas pumped contains dust or foreign particles, a suitable 10 micron (or finer) inlet filter should be
installed at the inlet port
If the possibility exists that the pump inlet can become closed during operation it will be essential to install
some type of vacuum relief valve (anti-cavitation valve) so that air can enter the pump inlet. Never run a
pump with a closed suction, which causes cavitation and will damage the pump.
Discharge Piping
Discharge piping should be at least the size of the separator discharge. Do not discharge the exhaust
gases from the pump system into the area where the system is installed. Vapors pulled over from the
process could be hazardous. Install an exhaust line of at least the same diameter as the discharge
connection on top of the separator reservoir leading outside. Install a dripleg with tee on the discharge line
to prevent condensables from draining back into the separator reservoir. See the “Discharge piping
diagram” on the next page.
For pump systems operating in parallel on a common discharge, we recommend the installation of a
suitable check valve close to the separator discharge flange of each unit. When discharging more than one
pump in a common discharge line and/or over a long distance, oversize pipe accordingly.
Discharge piping diagrams
Cooling water piping (water cooled systems only)
Water-cooled systems require an adequate supply of cooling water at a maximum of 85°F and a minimum
supply pressure of 20 psig. If the cooling water temperature is higher or available pressure lower, consult
your dealer or call the factory.
The cooling water outlet connection of the heat exchanger may be fitted with an optional automatic
temperature control valve, which regulates the cooling water flow rate depending on pump operating
temperature. The valve is preset at the factory. To raise the system operating temperature, turn the valve-
adjusting screw counter-clockwise. To lower operating temperature, turn clockwise. Normal system
operating temperature is between 140° - 185° F. The valve will only open when the system operating
temperature is reached.
Dekker Vacuum Technologies, Inc. – Vmax/13 7

THEORY OF OPERATION
The DEKKER Vmax oil-sealed liquid ring vacuum pump system includes our high efficiency liquid ring
vacuum pump. The liquid ring vacuum pump is known for its simplicity in design and low maintenance
requirements, due to the absence of wearing parts such as pistons, sliding vanes and internal bearings.
The impeller assembly is the only moving part, which rotates freely in the casing without metal-to-metal
contact. This means that no internal lubrication is required. The function of the sealing liquid is to create a
liquid piston action used to produce vacuum and to remove the heat of compression. The seal fluid in the
system circulates in a closed loop passing through an air- or water-cooled heat exchanger that removes the
heat of compression. The discharge separator/reservoir holds the seal fluid and incorporates the DEKKER
patented high-efficiency separator arrangement to separate the seal fluid from the air or gases discharged
by the pump. See “Piping and Instrument Diagram” of the Vmax oil-sealed liquid ring vacuum pump system
below.
START UP PROCEDURES
1 Ensure seal fluid isolation valve is open. This
valve is located below the separator and/or
before the strainer.
2 Jog the motor briefly and check direction of
rotation. The correct direction of rotation is
marked by an arrow on the motor or pump
housing. If direction is incorrect switch any
two of the three leads at the power
connection. The correct direction of rotation is
clockwise facing the pump from the drive end
and counter-clockwise if viewed from the non-
drive end.
3A Check drive coupling alignment. Angular
alignment should be within .035” - .175”.
Parallel alignment should be within .010” -
.025”. Consult the factory for specific system
size alignment. Mono-block units do not
require any field adjustment (motors are C-
face mounted).
Dekker Vacuum Technologies, Inc. – Vmax/13 8

3B For units utilizing V-belt drives, make sure the
sheaves are properly installed and aligned
before attempting to tension the drive. The V-
belts should be placed over the sheaves and
in the grooves without forcing them over the
sides of the grooves. The tensioning steps 1,
2, 3 and 4 can be used for all types of V-
belts, all cross sections and number of belts
and all types of construction.
Avoid excessive heat (140oF and higher);
belt life will be shortened. Never switch or
mix belts from one groove to another on the
sheaves. Do not use belt dressing. Sheaves
should remain free of oil and grease. When
replacing belts install an identical set.
For more specific V-belt tensioning guidelines
consult factory.
1. With all belts in their grooves, adjust
centers to take up the slack until they are
fairly taut. Use standard V-belt tensioning
guidelines.
2. Start the drive and continue to adjust until
the belts have only a slight bow on the
slack side while operating with load
conditions.
3. After several days of operation, the belts
will seat themselves in the sheave
grooves. Further tensioning may be
necessary to the point that the drive
shows a slight bow in the slack side.
Insufficient tension is often evidenced by
slipping (squealing) at start-up.
4. If the unit is idle for an extended period of
time, the tension on the belts should be
removed.
4 Check fluid level in separator reservoir. The
fluid level should be at the FILL LINE on the
sight gauge. Add oil if necessary.
5 If your system contains an inlet valve, set it to
approximately 3/4 closed, and start pump. If
valve is not supplied, one should be installed.
6 Run the pump for a few minutes, then turn it
off.
7 With the pump shut off, check fluid level
again. The fluid level should be at the FILL
LINE on the sight gauge. Add fluid if
necessary.
Warning: never remove the oil fill plug
while the pump is running.
8 Start pump again and check that discharge
pressure on the separator pressure gauge
does not exceed 2 psig when operating under
vacuum conditions. A pressure higher than 2
psig is a sign of high back-pressure in the
discharge pipe system. Pressure gauge might
show a higher pressure at start-up at low
vacuum (0-10" Hg).
Dekker Vacuum Technologies, Inc. – Vmax/13 9

9 Check the voltage and motor current, they
should be within the specifications for the
motor. Standard motors have a 1.15 S.F.
(Service Factor).
Note: This test should also be performed
under normal system operating conditions.
DANGER: HIGH VOLTAGE!
Lethal shock hazard present.
USE EXTREME CAUTION!
10 After 15-30 minutes of operation, check pump
operating temperature, which should be in the
140° to 185° F range. Some smaller units may
run cooler.
SHUT DOWN PROCEDURE
To stop the pump system follow the procedure as lined out below.
Push the STOP button, or turn switch to the OFF position. The inlet check valve will prevent fluid from the
system being sucked back into the inlet manifold.
Note: If inlet piping could be under vacuum for an extended period of time without the pump
running, inlet piping should be vented to atmosphere.
Note: Close the seal fluid isolation valve and the pump inlet isolation valve during extended periods
of storage or when transporting. Open valves before starting system.
SEQUENCE OF OPERATION
The following sequence of operation is a description of how the Vmax oil-sealed vacuum pump system
should operate. The description is general to cover simplex to multiplex (more than one pump) systems. It
is assumed that all start-up procedures have been followed. Ensure that pump reservoirs are filled with oil
(See “Start-up Procedures”, page 5). Make sure that the seal fluid isolation valve is in the open position. If
unsure about the function of one of the electrical controls mentioned below, see the "Electrical Controls"
section (page 10) for a description of the component. If any of the below do not occur, see the "Trouble-
shooting " section (page 12).
Once the power connection to the system has been made, the following should occur:
♦If disconnects or circuit breakers are installed on the control panel, and are turned to the ON position,
the system will be energized. If POWER ON indicating lights are installed on the panel, the lights will be
illuminated.
♦If any other lights are illuminated, see the "Trouble-shooting" section (page 12).
♦If HAND-OFF-AUTO selector switches are installed and are turned to the HAND mode, the pump(s) will
immediately start. If PUMP ON light(s) are installed on the panel, they should light up to indicate pump
operation. We suggest that each pump be tested ("bump started") in the HAND mode initially to check
rotation of the pump. When facing the drive end of the pump, the correct rotation is clockwise. When in
HAND mode, the pumps will run continuously unless an alarm condition is triggered. If such a condition
occurs, see the "Trouble-shooting " section.
♦When the HAND-OFF-AUTO selector switch is placed in the AUTO mode, the pumps will operate from
vacuum switches (if installed). In multiplex pump systems, each vacuum switch is set with a differential
as well as an offset relative to the next switch. The switches should not be set identically. The
differential is usually between 3 to 6” Hg. For details on setting the vacuum switches, see the
“Accessories and Protective Devices” section on page 11. Below is an example for a duplex system.
The differential for each switch is 4"Hg, the offset between the two switches is 2"Hg.
PUMP PUMP ON PUMP OFF
Pump 1 (lead pump) @ 21"Hg @ 25"Hg
Pump 2 (lag pump) @ 19"Hg @ 23"Hg
Dekker Vacuum Technologies, Inc. – Vmax/13 10

♦The switches are set in this manner so that if pump 1 (lead pump) cannot satisfy demand and the
vacuum level drops below 21"Hg, the lag pump (2) will start-up when the vacuum level reaches 19"Hg
and stops at 23” Hg.
♦All multiplex systems are supplied with "Automatic alternation" and "Frequent stop/start protection"
unless otherwise specified.
♦"Automatic alternation" allows the pumps to operate equally (even run time) by alternating each pump
whenever the pump(s) shut down. When alternation occurs, the "lead" pump becomes the "lag" pump
and the "lag" pump becomes the "lead" pump.
♦"Frequent stop/start protection" is used to allow the pump(s) to operate a minimum amount of time.
The time period is factory-set at 10 minutes. This allows the pump(s) to warm up and eliminate frequent
starting of the pump(s) which can cause premature coupling failure and breakdown of electrical
components. The pump(s) will continue to operate after the vacuum level has been satisfied. If the
possibility exists that the pump could work with a closed suction, a relief valve must be installed to
prevent cavitation.
♦If the pump(s) are not alternating and/or are frequent starting, one of the electrical components may be
defective. Contact the factory for more information.
SYSTEM ALARM CONDITIONS
The following is a description of how alarm conditions will affect the operation of the system.
♦If a "Lag pump in operation" alarm is installed in the panel, observe the following. Such an alarm is
usually only supplied with medical packages. The alarm consists of a warning light and an audible
alarm. The alarm will trigger when the "lag" pump starts up. The alarm will not affect the operation of
the system. The light will illuminate and the alarm will sound. The audible alarm can only be silenced by
physically (or remotely) pushing the ALARM SILENCE button. This will not stop the LAG PUMP ON
light from illuminating. The light can be reset by physically (or remotely) pressing the ALARM RESET
button.
Note: If the lag pump is still operating when the ALARM SILENCE or ALARM RESET buttons are
pressed, the alarm will continue to sound. The alarm will only reset if the lag pump is not running.
♦"Transformer failure" light (optional). Only installed if more than one control voltage transformer is
supplied. If the TRANSFORMER FAILURE light is illuminated, one of the transformers has
malfunctioned and the second one has picked up. As long as a back-up transformer is available, the
above alarm will not affect the operation of the system. If both transformers fail, the system will shut
down.
♦"High temperature" light. If the HIGH TEMPERATURE light illuminates, the affected pump will shut
down unless otherwise specified at time of purchase of the equipment. The back-up pump(s) will
continue to operate unless a high temperature (or other) alarm occurs in those pump(s).
♦"Low level" light (optional). If the LOW OIL LEVEL light is illuminated, the affected pump will shut
down. The back-up pump(s) will continue to operate unless a similar condition occurs in those pump(s).
MAINTENANCE
As you proceed in reading this section, it will become clear that the “Maintenance Schedule” for DVT Vmax
oil-sealed liquid ring vacuum pump systems is quite minimal. The use of the service gauges will alert you
when service is required.
WARNING: Before attempting any maintenance such as changing the fluid, disconnect all power
from the system by switching off the main breaker or disconnect switch. This will prevent the
system from automatically starting from a vacuum switch.
Bearing Lubrication - Pump
The .25 – 20 HP Titan-series single-stage liquid ring vacuum pumps are installed with sealed bearings that
require no field lubrication.
The 25 – 40 HP Titan-series single-stage liquid ring vacuum pumps which are belt-driven, the 50 – 100 HP
Titan-series single-stage pumps and the 2 – 60 HP two-stage Titan-series pumps require lubricating every
3000 hours. Extreme operating conditions may require more frequent lubricating. Grease fittings are
located on the top of each bearing housing.
For Titan-series two-stage pumps 100 HP and up, please consult Factory.
Dekker Vacuum Technologies, Inc. – Vmax/13 11

The Maxima-K series of large capacity single-stage liquid ring vacuum pumps require lubricating every
1500 hours of operation. Grease fittings are located on the top of each bearing housing.
Use a good quality high temperature lithium based grease of #2 consistency. Typical products are Texaco
Premium RB and Chevron SR1 #2.
Pump bearing lubricating schedule
Pump type Pump HP Greasing schedule
Titan-series single-stage .25 - 20 none required
Titan-series single-stage 25 – 100 every 3000 hours
Titan-series two-stage 2 – 60 every 3000 hours
Titan-series two-stage 100 - up consult factory
Maxima-K-series large capacity 50 - up every 1500 hours
Bearing Lubrication – Motor (where required)
The motors are shipped from the factory with the bearings properly packed with grease. During extended
storage of 6 months or greater, the ball-bearings should be re-lubricated prior to starting with a good quality
high temperature lithium based grease of #2 consistency. Typical products are Texaco Premium RB and
Chevron SR1 #2. Roller-bearings (V-belt drive systems) use the Texaco Premium RB or Chevron Black
Pearl EP #2.
The bearings may be lubricated with the motor running or stationary. Stationary with the motor warm is
preferred. Locate the grease inlets – there is one on each end of the motor.
Note: This is generally the case with domestic motors. European motors use sealed bearings and
do not require lubrication. Consult Factory with any questions.
Clean the area and replace the pipe plug with a grease fitting as generally they are not equipped with a
grease fitting. Remove the grease drain plug, located at the lower portion of each motor face (typically a
plastic plug), and loosen any hardened grease that may block the drain. Add the recommended volume of
the previously described grease using a hand operated grease gun. Run the motor for two hours. Replace
the pipe plug in grease drain.
Mixing of lubricants is not recommended due to possible incompatibility. Signs of incompatibility are
extreme soupiness from the grease relief drain or from the shaft opening. If changing a lubricant, grease
and then re-grease after 100 hours of service.
Frequency/volume of greasing is based on service conditions, speed and frame size. See table below.
Standard conditions: 8 hour day operation, normal or light loading, clean environment at a 100 ºF
maximum ambient temperature.
Severe conditions: 24 hour operation or shock loading, vibration, dirty or dusty environment, running at a
100 ºF to 120 ºF ambient temperature.
Extreme conditions: heavy shock, vibration, or dust.
See table below for lubricating details.
Motor bearing lubricating schedule
Lubrication Frequency – Ball Bearings
Roller bearings – divide time by 2
Lubrication
Volume
NEMA VolumeSpeed
(RPM)
NEMA
Frame
Standard
Conditions
Severe
Conditions
Extreme
Conditions Frame (Cubic inches)
1800 182-215 3 years 1 year 6 months 182-215 0.5
1800 254-365 2 years 6-12 months 3 months 254-286 1.0
1800 404-449 1 year 6 months 1-3 months 324-365 1.5
3600 ALL 6 months 3 months 1 month 404-449 2.5
Dekker Vacuum Technologies, Inc. – Vmax/13 12

Inlet Filter (if installed)
Check after first 8 hours of operation. Clean or replace inlet filter element every 1000 to 3000 hours
depending on application or if excessive pressure drop is noticed. In some applications it may be
necessary to clean inlet filter more often.
CAUTION: Be careful not to allow accumulated foreign material to fall in the pump suction opening
when removing the filter cartridge. Horizontal filter installation is recommended to prevent this.
Filters must be disposed of properly as they might contain toxic substances carried over from the
process.
Seal Fluid
The system(s) are shipped with our especially formulated Vmaxol seal fluid. These fluids are specifically
designed for use in our Vmax systems, providing low viscosity, excellent water separating qualities, anti-
foaming and low oxidation. We recommend that our Vmaxol sealing fluids be used for obtaining ultimate
performance from your Vmax vacuum pump system and to guarantee the extended 3-year warranty period.
Container
Size
Standard
Vmaxol
(10,000 hours of operation)
Synthetic/Food grade
Long-life Vmaxol
(15,000 hours of operation)
5 Gallon Container 5220-0050-000 5220-0050-001
55 Gallon Drum 5220-0550-000 5220-0550-001
Material Safety Data Sheets available upon request
When using Standard Vmaxol it is recommended that the seal fluid be changed every 10,000 hours of
operation or once a year, whichever comes first. When using Synthetic/Food grade Long-life Vmaxol,
seal fluid may be changed every 15,000 hours of operation or once a year, whichever comes first. Extreme
operating conditions may require more frequent changes.
To change the fluid, first make sure there is no power to the system and the pump is off. Drain the fluid
reservoir, vacuum pump and heat exchanger using the drain valves. We recommend that the fluid be
changed when the system is at operating temperature.
When charging the system with new fluid, make sure that the pump is filled with oil to the shaft centerline
level. Do not fill the pump above the shaft centerline. Starting the pump with oil level above the shaft
centerline may result in shaft or impeller damage or failure. You can add oil by removing the suction or
discharge flange and pouring oil through pump suction or discharge port.
Fill the reservoir to the FILL LINE on the sight gauge. Open the air bleed valve on the heat exchanger to
remove all air from the system. Run the pump for a few minutes, stop and check fluid level again. If
required, add additional fluid to the reservoir. Be sure not to overfill.
Check seal fluid level in the reservoir. A high fluid level could mean a build-up of water in the reservoir,
which should be drained. Check every 500 hours.
Devarnishing
The operating life of the unit is greatly enhanced based on the quality of the seal fluid. Oxidized or
darkened seal fluid is a sign of trouble. Plugged filters reduce performance and may damage pump.
Periodic maintenance will offer the best protection for your equipment.
DEKKER offers a specially formulated devarnishing compound Proclean 39V for oil-sealed liquidring
pumps and systems. Procedure for using Proclean 39V and MSDS sheet are included with the product.
The compound is available in the following quantities:
Proclean 39V (part no.: 5230-0010-000) – 1 gallon
Proclean 39V (part no.: 5230-0050-000) – 5 gallon
Proclean 39V (part no.: 5230-0055-000) – 55 gallon
NOTE: Varnished pumps are not covered under warranty.
Seal Fluid Strainer
After the first 50 hours of operation, clean the strainer in the seal fluid line. This is done to remove any
debris carried over into the system from the process. Clean and inspect the strainer every 1000-3000
hours depending on application or if excessive oil discharge temperature (above 185°F) is indicated. An
increase in pump discharge oil temperature is an indication of low oil flow and normally is an indication of
Dekker Vacuum Technologies, Inc. – Vmax/13 13

strainer blockage. If cleaning of strainer does not decrease temperature check the seal fluid line for
blockage.
Spin-on Oil Filter (if installed)
If you notice that the operating temperature of your system steadily increases, change the spin-on filter.
Separator Element
The separator elements are located in the separator reservoir. Its purpose is to remove the oil from the
discharge air. Replace the element every 10,000 hours or once a year. Earlier replacement may be
necessary when the back-pressure is higher than 4 psig. High back-pressure is a result of dirt build-up on
the separator element due to oil varnish, or contaminated inlet gas stream. Replacement may vary
depending on application.
NOTE: Thread-in style filters are installed hand-tight as an oil filter. Do not over-tighten with a
wrench.
Separator Element Oil Return Line
The separator element oil return lines are 1/4” to 3/8” transparent tubing. The purpose of these lines is to
remove excessive oil build-up from inside the separator and separator element. If excessive smoking or oil
mist is present, check the oil return lines for blockage and replace if necessary. Also check that the steel
section of oil return line located on top of the separator reservoir is cut at a 45° angle and is touching the
bottom of the separator element.
Mechanical Shaft Seals
All DEKKER oil-sealed liquid ring vacuum pumps are fitted with mechanical shaft seals. Mechanical seals
do not require maintenance unless there is more than a small amount of leakage. To define this we
differentiate between the following:
Weepage: Mechanical seals work by having two flat surfaces pushed together by axial force from the
closing mechanism and by product pressure in the seal chamber. When the seal is in operation, the seal
fluid lubricates the tow faces. This thin film of lubrication protects the faces of the seal from heat and
excessive wear, but it can also allow for a small amount of leakage across the seal face. This small
leakage is called a “weep”. While a weep has rather arbitrary limits, it is commonly considered to be a
leakage rate of less than one drop of liquid every minute. Seal weeps are not covered under warranty.
Leakage: a leakage rate of more than one drop per minute is considered to be a “leak”. Seal leakage is
normally a result of a build-up of abrasive particles carried over in the pump suction. These particles cause
excessive wear on the seal faces. Leakage caused by wear and tear is not covered under warranty.
Seal replacement is addressed in the assembly and disassembly instruction for the specific pump model
used. Consult factory for assistance.
MAINTENANCE SCHEDULE
To help ensure trouble free system operation, a basic maintenance schedule consisting of the following
system checks is recommended.
First 8 hours operation
Check oil level and inlet filter element if installed. Clean strainers and remove temporary inlet screen.
Check for water in sight gauge and drain if necessary. Check piping for signs of oil leakage and tighten if
necessary.
500 hours operation
Under normal operating conditions repeat 8 hour check procedure as described above
1000 hours operation
Check back-pressure on separator element; it should not exceed 4 psig. Change separator element if back-
pressure exceeds 4 psig. Also check discharge pipe system for blockage.
Clean or replace inlet filter element every 1000 to 3000 hours depending on application or if excessive
pressure drop is noticed.
Remove debris from pump housing, motor fan guard and heat exchanger.
1,000-3,000 hours of operation
Applicable to pumps equipped with grease fittings located on each bearing housing. Grease bearings with
a #2 quality lithium grease. Do not over-grease, 3 to 4 pumps with a grease gun is sufficient under normal
conditions.
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10,000 hours of operation
Or once per year, change seal fluid. Use DEKKER Vmaxol seal fluid. Life of Standard Vmaxol is 10,000
hours of operation. Synthetic/Food grade Long-life Vmaxol may be changed every 15,000 hours of
operation or once a year, whichever comes first.
Change separator element if back- pressure exceeds 4 psig.
Check coupling element for wear. Replace if worn.
Clean strainer in seal fluid line.
30,000 hours of operation
Or every 5 years, it is recommended that you replace the vacuum pump’s mechanical seals and bearings
as preventative maintenance. This should be done by a DEKKER authorized distributor or properly trained
service technician.
ELECTRICAL CONTROLS (if included)
♦Disconnect Handles: must be turned on to energize the system. The handles must be turned off to
open control panel.
♦CAUTION: High voltage, main disconnect must be off when servicing panel.
♦HOA (Hand-Off-Auto) Selector Switches: are supplied only if vacuum switches are supplied. Pump
units will start in HAND mode (unless units are in a shutdown alarm condition). The pumps will bypass
vacuum switches. AUTO mode, allows units to start upon contact closure of the vacuum switch.
♦Stop/Start Push Buttons: are included if HOA selector switch is not installed.
♦Reset Button: is used to reset the starter overloads.
♦Power On Light: indicates that power is on in panel.
♦Pump Running Light: indicates a pump is operating.
♦High Temperature Overload Light: indicates a pump has overheated and shuts the pump down.
The ALARM RESET button needs to be pressed to reset the alarm condition. If high temperature
condition has not been fixed, the alarm will not reset.
♦High Back-pressure Light: indicates the exhaust filter element in the vacuum pump needs to be
replaced. Alarm does not shut down the pump. Replace element as soon as possible.
♦Transformer Failure Light: indicates transformer failure. If alternate transformers are included in the
panel, the alternate transformer will pick up. The pump will shut down if only one transformer is
present and fails.
♦Lag Pump In Operation Light: When the light illuminates, the lag pump is in operation.
♦Audible Alarm: signals that the lag pump is in operation. The alarm can be silenced by pressing the
ALARM SILENCE button. The audible alarm may also be used to signal other alarm conditions, such
as high temperature, low oil level or high back pressure.
♦Alarm Silence Button: is used to silence the audible alarm, but the light will remain on unless alarm
condition has been corrected.
♦Alarm Reset Button: is used to reset an alarm condition when the condition has been rectified. The
ALARM RESET button will stop the light and alarm if alarm condition has been corrected.
♦Hour Meter: is a running clock that indicates how many hours each pump has been operating. It
should be used to determine when the oil in the pump and the discharge filter element needs to be
replaced. See Maintenance Schedule (page 9) for oil life.
ACCESSORIES AND PROTECTIVE DEVICES (if included)
Accessories
The following accessories are available for Vmax oil-sealed liquid ring vacuum pump systems.
♦Flexible Connectors (optional): are used in piping systems to eliminate vibration transmission from
machinery throughout the piping network. If ordered, DEKKER uses braided flexible connectors on the
Vmax oil-sealed vacuum pump systems.
Dekker Vacuum Technologies, Inc. – Vmax/13 15

♦Vibration Isolators (optional): are used to eliminate vibrations, noise and shock transmission from
machinery to the floor. Floor-mount type vibration isolators are used for Vmax vacuum pump systems.
The vibration isolators have a steel top plate, threaded insert and steel base, both totally imbedded in
an oil-resistant neoprene. The isolators bolt onto a tank or base-frame with one bolt and have two
mounting bolts to mount to the foundation or floor.
♦System Isolation Valve (optional): may be installed on the vacuum receiver tank or vacuum pump
manifold. Usually the valve is used to isolate the vacuum system from the piping network.
♦Inlet Filter (optional): An inlet filter may be installed on the Vmax oil-sealed vacuum pump systems
to prevent carry-over of particles into the pump.
♦Vacuum Relief Valve (optional): This valve may be installed on the pump suction manifold or on the
receiver. The vacuum relief valve is used to protect the vacuum pump from closed suction which can
damage the pump.
♦Vacuum Switch (optional): is used to automatically switch the vacuum pump ON and OFF, based on
demand. This switch is standard on all multiplex systems.
Switches are factory preset for your application and it is NOT RECOMMENDED to adjust the
vacuum switch. Each switch is labeled as LEAD or LAG and is marked with the corresponding PUMP
ON and PUMP OFF points.
If the vacuum switch must be adjusted, please follow these instructions:
1. To increase the point at which the vacuum pump turns
ON, turn the RANGE ADJUSTMENT SCREW (R) counter-
clockwise. See the range scale on switch for
approximation. Use vacuum gauge to observe actual
PUMP ON and PUMP OFF point.
2. To increase the differential, which is the difference between
the PUMP ON and PUMP OFF point, turn the
DIFFERENTIAL ADJUSTMENT SCREW (D) counter-
clockwise. To obtain the correct PUMP OFF point observe
the physical opening of the contact switch as compared to
the vacuum gauge reading. The vacuum pump will not stop
running, because all systems are equipped with “10 minute
mimum run” timers.
3. Remember you will need to vary the vacuum level in the
receiver or manifold to see a change in the vacuum level,
and to adjust the switches.
♦Microprocessing Controller (optional): system may be equipped with this very reliable and compact
Controller module for controlling and monitoring basic machinery functions. The following instructions
should help guide the end user to perform simple changes to the Controllers’ pre-programmed
settings. The specific preset areas that may be modified are outlined below.
Set the Internal Clock:
Upon powering the system control panel, the installation technician must ensure that the internal clock
in the Controller has been set to the current military time setting. The Controller is equipped with an
internal capacitor that will hold the time for approximately 80 hrs. If your system has not been installed
within the allotted time frame, the alternation of the automatic mode will not occur and only one of the
pumps will function until the time parameter has been updated. Refer to the following instructions for
access to and changing of the parameters.
Sequence of Operation Automatic Mode:
The switch on the front of the system control panel must be placed in the automatic mode before the
Controller program will initiate. Upon starting the system, all pumps should come on line and run for a
minimum of 10 minutes each. As the demand for the vacuum pumps change, the individual units will
turn off and on as required, each time running for a minimum of 10 minutes after initial start. If all the
individual pumps are not placed in automatic mode simultaneously, there may be a pump that does
not ramp up to speed with the lead pump. This does not mean that there is a problem with your
vacuum system. The reason for this can be the switch settings for lead and lag pumps. When the
system is started and individual units are placed in automatic mode at different times, the demand for
lag pump may not be present due to the time lapse between placing the various pumps in automatic
mode.
Dekker Vacuum Technologies, Inc. – Vmax/13 16

After 24 hours of operation (1 calendar day), the lead pump will become the lag pump and the
remaining pumps will shift one spot forward, keeping the same on and off switch settings as before.
The alternation of the vacuum pumps will allow equal usage of the equipment and will increase the life
expectancy of the system. If the demand for the remaining pumps needs to change, you must enter
the necessary value in the Controller for the level of vacuum you wish to maintain as a
minimum/maximum for each on/off switch point. If there is not a demand for the lag pump(s) they will
never run with the lead pump. Every day the lead pump will change.
When the lead pump cannot handle the demand of the system, the remaining pump(s) will turn on. For
medical packages: when the last pump in the system is required to operate, the alarm condition will
trigger the audio or visual signal that the lag pump is operating, and the system is near full capacity.
The alarm reset button should be pressed and the light or audible sound will stop.
Manual Modes:
Any pump can be independently started manually by placing the system in manual mode. All high
temperature and low/high level switches will still be monitoring the equipment, thus ensuring the safe
operation of your Vacuum system. The Controller program will not initiate and the automatic
alternation will not function. The cost of operating the system will be considerably higher than in
automatic mode.
Switching to parameterization mode:
In order to change any of the preset values in the Controller, the initial procedure is the same:
1. Turn on power to the Controller.
2. Place pump(s) in manual (Hand) mode. This is done so vacuum will be maintained, otherwise
when saving changes, the pump(s) will shut down.
3. Press ESC, then scroll down to “Set Param”, then push OK.
The Controller switches to parameterization mode and displays the parameterization menu. The operator
can now access the various menus by using the up or down arrows to toggle to desired menu.
Selecting a parameter:
The following can be parameters:
•The delay times of a time relay.
•The switching times of an alternation time switch.
•The threshold value of a counter.
•The monitoring time of an operating hours counter (internal clock).
•The switching thresholds of a vacuum switch.
To select a parameter, proceed as follows:
1. Select the “Set Param” option from the parameterization menu. (UP or DOWN arrows)
2. Once you have the cursor (>) on the desired parameter, press OK.
The Controller displays the first parameter. If parameters cannot be set or modified, you can use ESC
to return to the parameterization menu. The ESC key can be used at any time to leave the
parameterization mode and return to the running mode.
3. Select the desired parameter by using the UP or DOWN arrows to toggle through until the
desired parameter is displayed in the window.
4. To change a parameter, you must select it and press OK.
Changing a parameter:
To change a parameter, you first must select it as shown above. Once you have selected the desired
parameter, you can change the value by moving the cursor to the desired location with the <or >
arrows. The actual value is changed by using the UP or DOWN arrow. The steps are as follows:
1. Move the cursor to the point at which you want to make the change. (<or >arrows)
2. Change the value. (UP or DOWN arrows)
3. Accept the value. (OK)
Once all parameters are modified, you’ll need to exit the “Set Param” mode by followings these steps:
1. Press ESC until you reach the screen that has STOP.
2. Arrow up to STOP and press OK.
3. When prompted Stop Prg, use arrow UP or DOWN to Yes and press OK.
4. Arrow down to Start and press OK. (This will save the changes)
5. Turn pump(s) to Automatic mode.
Vacuum pump ON/OFF settings for Microprocessing Controller (Vacuum in “Hg):
When setting the ON and OFF switch points in your Controller, use the following table for reference:
Dekker Vacuum Technologies, Inc. – Vmax/13 17

Inches of HgV PLC Setting
29 234
28 488
27 742
26 996
25 1250
24 1504
23 1758
22 2012
21 2266
20 2520
19 2775
18 3028
17 3282
16 3536
15 3790
14 4044
13 4298
12 4552
11 4806
10 5060
This table will apply to all single and multiplex systems equipped with a Controller after 5/15/02 (all units
supplied with a Controller prior to this date must contact the Service or Engineering department with
serial number of supplied equipment for assistance). These values are entered directly into the
Controller in the appropriate block number for lead and lag pumps. Refer to the specific instruction set
provided with the IOM for block number identification.
- The correct value can also be determined by the following formula:
7600 – (Inches of HgV x 254) = Controller setting
Example: SW↑= 3282 – switch pump on at 17”HgV (7600 – (17 x 254) = 3282)
SW↓= 2520 – switch pump off at 20”HgV (7600 – (20 x 254) = 2520)
- To determine the vacuum point displayed on the LED of the Controller unit use the following
formula:
“HgV = 29.92 – (Displayed Value/254)
Please note that the values you are working with are Torr values multiplied by 10.
A perfect vacuum is approaching a setting of 0 and at atmospheric pressure at sea-level the setting is
at 7600 (760 Torr x 10).
Settings for Simplex Systems:
- Unless otherwise noted, the standard switch points for a Simplex System will be set at:
Lead pump ON at 17”HgV – OFF at 20”HgV
- Specific block numbers for Simplex Controller Program:
Lead pump =B15
Setting for Duplex Systems:
- Unless otherwise noted, the standard switch points for a Duplex System will be set at:
Lead pump ON at 17”HgV – OFF at 20”HgV
Lag pump ON at 16”HgV – OFF at 19”HgV
- Specific block numbers for Duplex Controller Program:
Lead pump =B15
Lag pump =B16
Alarm visual/audible =B13 (Typically set to come on and off with lag pump settings)
Setting for Triplex Systems:
- Unless otherwise noted, the standard switch points for a Triplex System will be set at:
Lead pump ON at 17”HgV – OFF at 20”HgV
Mid pump ON at 16”HgV – OFF at 19”HgV
Lag pump ON at 15”HgV – OFF at 18”HgV
- Specific Block number for Triplex Controller Program:
Lead Pump =B15
Mid pump =B16
Lag pump =B23
Alarm visual/audible =B13 (Typically set to come on and off with lag pump settings)
Dekker Vacuum Technologies, Inc. – Vmax/13 18

Protective Devices
The following protective devices are available to protect the unit from being damaged and to help with
maintenance.
♦High Temperature Switch (standard except on VmaxLT): will signal when the temperature of the oil
is exceeding the shut-down level. The switch will shut the unit down. The unit will not restart until the
alarm condition is acknowledged and is reset. The switch is a “snap disc” type of switch that is
normally closed. When the temperature reaches the maximum setpoint, the switch will open. Once
the switch has opened, there is a 10-20oF differential that the temperature will need to drop to, in order
for the switch to close.
♦High Back-pressure Switch (optional): is installed on the discharge of the separator. When the
back-pressure reaches a pre-determined level (4 psi), the switch will signal the control panel. A high
back-pressure light may be installed on the control panel, which, when illuminated, signals that the
exhaust element in the vacuum pump needs to be replaced. Note that the high back-pressure switch
will not shut the unit down, but the exhaust element must be replaced as soon as possible.
♦Lag Pump On Alarm (optional): An NFPA 99 requirement on medical systems. This is an
audio/visual alarm that signals lag pump operation. Once the alarm triggers, the alarm must be
acknowledged and reset. The alarm will not reset if the lag pump is still in operation. This alarm
indicates vacuum is greater than the supply of the lead pump only.
♦Transformer Failure Light (optional): All standard medical NFPA 99 oil-sealed liquidring vacuum
pump systems are supplied with two (2) control voltage transformers (one primary and one for
backup). If indication is desired in the event that the primary transformer fails and the backup
transformer picks up, a TRANSFORMER FAILURE light will be necessary. The defective transformer
should be replaced as soon as possible. When the primary transformer fails, the operation of the
system will not be interrupted. If the backup transformer also fails, the system will shut down.
♦Low Oil Level Switch (optional): This switch is installed in the separator/reservoir of the liquidring
vacuum pump. It is a float type of switch. If the level switch is triggered, the affected pump will shut
down. The LOW OIL LEVEL light on the control panel will be illuminated. The low level switch will be
wired into the main alarm of the panel. The alarm will have to be reset to restart the pump. When
filling the system with oil, make sure that the power to the pump is off because if the alarm
reset button has been reset and the level switches contacts close while filling the pump, the
pump will start-up automatically.
♦Frequent Stop/Start Protection (standard on multiplex systems): Allows each pump to run a
minimum amount of time. Frequent stopping/starting can reduce coupling life and is also less efficient
from a power consumption standpoint.
♦Automatic Alternation (standard on multiplex systems unless otherwise specified): Allows the
pumps to alternate. The primary feature of automatic alternation is to equalize the running time on all
the pumps.
Dekker Vacuum Technologies, Inc. – Vmax/13 19

TROUBLE-SHOOTING
Following is a basic trouble-shooting guide. We recommended that you consult your local dealer for
service. Each Vmax system is tested and checked at the factory. Always indicate system model and serial
number when calling.
WARNING: Before attempting any repairs, disconnect all power from the system by switching off
the main breaker or disconnect switch. This will prevent the system from automatically starting
from a vacuum switch.
TROUBLE SHOOTING FAQS (Frequently Asked Questions)
VMAX OIL-SEALED LIQUID RING VACUUM PUMP SYSTEMS
START-STOP PROBLEMS:
System will not start in HAND or AUTO position: (Vmax)
1. Check if the disconnect or circuit breaker is switched on.
2. Check the overload setting on the starter and fuses.
3. Check alarm reset, light should be off.
4. Ensure that the proper voltage is supplied and that the wire size is correct.
5. Check electrical control panel (if installed). Make sure that all wires are tight. Wires may vibrate loose during shipment or
operation.
6. Check low oil level switch (if installed). Add oil to reservoir if needed.
7. Check if the pump has seized by rotating the coupling by hand (disconnect power first). If a rubbing noise or
binding is observed, contact authorized dealer.
8. Check the high temperature switch, which should be set for 225oF.
9. Check if pump operates against high back-pressure (> 4 psig), if so replace oil separator element.
10. Check vacuum switch (if installed).
System shuts down while running: (Vmax)
1. Check oil temperature gauge for operating temperature.
2. Check the overload setting on the starter and fuses.
3. Ensure that the proper voltage is supplied and that the wire size is correct.
4. Check for loose electrical connections.
5. Check the vacuum switch setting (if installed).
6. Check low oil level switch (if installed), add oil to reservoir if needed.
7. Check if the pump has seized by rotating the coupling by hand (disconnect power first). If a rubbing noise or
binding is observed, contact authorized dealer.
8. Check high temperature switch, which should be set for 225oF.
9. Clean oil strainer.
10. Check if pump operates against high back-pressure (> 4 psig), if so replace oil separator element.
11. Check the overload setting on the starter and fuses.
VACUUM PROBLEMS:
System operates, but does not achieve desired vacuum level: (Vmax)
1. Stop system and disconnect power.
2. Check if the inlet valve is open and inlet filter is clean.
3. Ensure that no lines are open to the atmosphere, causing loss of vacuum.
4. Check for leaks in piping systems, using conventional leak detection methods.
5. Ensure that the oil level is correct and that the pump is primed and filled with oil to the shaft centerline only.
6. Check if the oil isolation valve is open.
7. Check if the oil solenoid valve (if installed) is working.
8. Check the vacuum switch setting (if installed).
9. Check setting of vacuum relief valve (if installed) and adjust as needed.
10. Check if the motor rotation is correct. Rotation should be clockwise (facing pump from motor side) and marked by
an arrow on the motor or pump housing. If incorrect, switch any two of the three main power leads on the
contactor inside the control panel.
Dekker Vacuum Technologies, Inc. – Vmax/13 20