VTS Medical Systems WPG Series Guide

Water pump group
Technical documentation
WPG-OEM-v.1.0 (07.2019)

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CONTENTS
1. INTRODUCTION ......................................................................................................................................... 2
1.1. Precautions, requirements, recommendations ................................................................................... 2
1.2. Transport and storage ........................................................................................................................ 2
2. APPLICATION AND D SIGN ........................................................................................................................ 2
2.1. Technical parameters ......................................................................................................................... 4
2.2. Pump groups characteristic ................................................................................................................ 5
3. INSTALLATION ........................................................................................................................................... 6
3.1.Hydraulic installation .......................................................................................................................... 6
3.2. lectric installation .............................................................................................................................. 7
4. OP RATION AND MAINTANANC .............................................................................................................. 9

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1. INTRODUCTION
1.1. Precautions, requirements, recommendations
Detailed analysis of this documentation, as well as assembly and use of equipment, according to the
descriptions contained therein, and following all safety requirements, is the basis for the correct and
safe operation of the device.
Producer won´t be responsible for damages caused by wrong usage or unrespect of the instructions
given in this manual.
This technical documentation must be delivered together with the device. The documentation
contains information concerning all possible configurations of water pump group, examples of
installation, as well as activation, use, repair and maintenance. This instruction manual is an
essential component of the product and should be placed near the device and be readily available to
the service team.
Manufacturer reserves the right to introduce changes to the instruction, as well as changes to the
device that affect its operation, without prior notice. VTS shall be are no responsibility for on-going
maintenance and damage, caused by standstills of equipment related to the waiting for warranty
services, all and any damage related to the Client’s property, other than the device in question, as
well as malfunctions that result from incorrect installation or improper use of the device.
1.2. Transport and storage
Prior to the installing and taking the device out of the cardboard box, it is required to check whether
the cardboard box has not been damaged in any way.
2. PPLIC TION ND DESIGN
The water pump group (WPG) it is the set of connected elements designed for control of the water
heater capacity.
VTS offer two types of the pump groups: first one (WPG) is the fully assembled, ready to connect
to the water coil, set of the pump, mixing valve and by-pass with shutting boll valves (Fig.1a) and
the second (WPG.S) it's the more simple and cheaper configuration of the mixing valve and
circulation pump (Fig.1b). The second one needs more actions and use additional hydraulic fittings
to inbuilt in the water heater supply installation.
Both are divided on 9 sizes. That are combination of 5 tree-way mixing valves with 3 sizes of water
pump.
The main elements of the pump circuits that are: circulating water pump, three-way valve with
actuator, filter, and two manometers.

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WP
a) WPG b) WPG.S
Fig.1. Structure of water pump group
1 – tree-way valve with actuator, 2- pump, 3 – thermomanometer, 4- ball valve, 5 – ball valve with filter, 6 – casing
Fig.2. showing the simple example of application with the Air Handling unit and control elements.
Fig.2. Operation diagram with full WPG (a), and simple WPG.S (b)
b)
B1
–
supply temperature sensor
VFD – frequency converter
T S2F – anti frost thermostat
B3 – external temperature sensor
1Y1 – damper actuator
ΔP – pressure guard
S3F – back water temperature sensor
Y1 – 3-way valve actuator
M1 – fan motor
M2 – pump motor
1 - casing
2 - thermomanometer
3 – circulation pump
4 - filter
5 – 3-way valve with actuator
a)

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2.1. Technical parameters
Table.1. Dimension and connection diameter
Pump circuit type
Foam
casing
type
Circuit casing dimension [mm] Connection diameter * Circuit set dimension [mm]
Lc Wc Hc [inch] DN L W H
WPG - 25-06 - 2.5 E
S 540 305 230
3/4" 20 436 135 165
WPG - 25-06 - 4.0 E 1" 25 448 135 176
WPG - 25-06 - 6.3 E 1" 25 448 135 176
WPG - 25-08 - 4.0 E
L 690 355 270
1" 25 498 135 182
WPG - 25-08 - 6.3 E 1" 25 498 135 182
WPG - 25-06 – 10 E 1 1/4" 32 516 191 195
WPG - 25-08 – 10 E 1 1/4" 32 566 191 200
WPG - 25-08 – 16 E 1 1/4" 32 566 191 220
WPG.S - 25-06 - 2,5 E
- - - -
3/4" 20 410 - 165
WPG.S - 25-06 – 4 E 1" 25 418 - 176
WPG.S - 25-06 - 6,3 E 1" 25 418 - 176
WPG.S - 25-08 – 4 E 1" 25 468 - 182
WPG.S - 25-08 - 6,3 E 1" 25 468 - 182
WPG.S - 25-06 – 10 E
- - - -
1 1/4" 32 460 - 195
WPG.S - 25-08 – 10 E 1 1/4" 32 530 - 200
WPG.S - 25-08 – 16 E 1 1/4" 32 530 - 220
* female thread diameter
Table.2.Technical data
Pump 3 way valve Actuator
Type mass
[kg] Voltage P max. [W]
Max.
current
[A]
Max.
water
temp.
[C]
Ambient
temp.
[C]
Max
work.
Pressure
[bar]
Overload
protection
IP k
vs
Max.
water
temp
[C]
IP Voltage
WPG - 25-06 - 2.5 E 5,4
1 x
230V/50Hz
37 0,29
110 0..40 10 integrated 44
2,5
120 54 24VAC
WPG.S - 25-06 - 2,5 E 4,2
WPG - 25-06 - 4.0 E 6,2
4
WPG.S - 25-06 - 4.0 E 5,1
WPG - 25-06 - 6.3 E 6,4
6,3
WPG.S - 25-06 - 6,3 E 5,3
WPG - 25-06 - 10 E 8,9
10
WPG.S - 25-06 - 10 E 6,8
WPG - 25-08 - 4.0 E 6,6
80 0,61
4
WPG.S - 25-08 - 4 E 5,7
WPG - 25-08 - 6.3 E 6,8
6,3
WPG.S - 25-08 - 6,3 E 5,9
WPG - 25-08 - 10 E 10,9
10
WPG.S - 25-08 - 10 E 9,1
WPG - 25-08 - 16 E 11,8
16
WPG.S - 25-08 - 16 E 9,5
*Additional information for the elements of the group can find in the suppliers manuals.

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2.2. Pump groups characteristic
The below characteristic concerning to the clean water. The pumps groups may be used in heating
systems containing glycol based anti-freeze with corrosion inhibitors, up to a maximum of 35%
solution. Depending on the type of glycol, the mixture and the liquid temperature, the viscosity will
increase with water as medium. This will influence the pressure loss of the system as well as the
efficiency, performance and load of the pump.
Fig.3. Characteristics of water pump groups
0
2
4
6
8
0 0,5 1 1,5 2 2,5 3 3,5 4 4,5
H [m]
Q [m3/h]
25-6
06_vlv.2,5
06_vlv.4
06_vlv.6,3
06_vlv.10
0
2
4
6
8
10
012345678
H [m]
Q [m3/h]
25-8
08_vlv.4
08_vlv.6,3
08_vlv.10
08_vlv.16

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3. INST LL TION
3.1.Hydraulic installation
The water pump group must always be installed where the pump motor shaft is in the horizontal
position. Before installing the system should be flushed out thoroughly to clear all foreign matter
such as solder, steel wool, copper filings.
The pump group must be connected to the installation with thermomanomeher from the water
heater side and valves from the net side, like in the below example.
Connection to the exchanger and installation should be carried out so as not to allow for stresses
which may result in mechanical damages or leakage. The pipeline should be supported in some
place to avoid the pass of weight and thermal stresses onto the exchanger's connections.
Ends of the groups are ended with an internal thread. To provide the seal, connection should be
made with using teflon tape or other sealing material. During assembly of the system to the pump
groups, counter the connection with additional wrench.
Fig.4. Example of installation
The pipe lines and place of water pump group should be planned so as it does not collide with the
other AHU sections and make possible inspection them without necessity disassembly.
Applied method of pump group installation with the supply system should allow for an easy
pipeline disassemble in order to remove the exchanger from the AHU.
Below drawing shows the available positions.
Fig.5. Position of the water pump group.

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Group cannot be subjected to very high temperatures, such as occur during eg. welding or
soldering. It should be installed only after the finished such work.
After assembly of the group, pressure test must be performed in order to check the tightness in
the threaded connections.
After connection water pump group to the installation make electrical connection of the pump and
valve actuators and assembly the casing.
3.2.Electric installation
The electrical connection should be carried out by an authorized electrician in accordance with
local regulations.
Do not remove motor terminal box covers, electrical cables or any other electrical
protective covering without first ensuring that the electrical supply is suitably isolated. Do
not attempt to supply electricity to the pump without ensuring that all electrical fittings,
cables and enclosures are intact and suitably electrically isolated from human touch
during operation.
Electric connection for the pump
The pump requires no external motor protection. Check that the supply voltage and frequency correspond to the values
stated on the nameplate.
The pump must not be used with an external speed control which varies the supply voltage, for example phase-cut or
pulse-cascade control.
The supplied pumps are delivered with molex 3-pin plug and cable to moved out of the pump group casing . Connect
power supply to the three leads L, N and P .
The cable size to be used is 3 core 0.75mm2. The cable should be capable of withstanding a
minimum temperature of 100°C.
Line/phase: L (brown)
Neutral : N (blue)
Protective earth: (yellow/green )

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Electric connection for the valve actuator
To make electrical connection of the valve actuator use cable 3x 075mm2 according to below
scheme
In the any other option refer to the manual delivered with valve actuator.
Both of them can be connected to VTS control system in case of ordering VTS AHU with full
automation.
Notes
11. Connect via safety isolation transformer.
12. Direction of rotation switch is covered.
Factory setting: Direction of rotation Y2 Control of controller
Meassuring voltage for reset
signal
Direction of rotation
Wiring diagram Standard connection

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4. OPER TION ND M INTEN NCE
Start-up of the pump
Do not start the pump until the system has been filled with liquid and vented. Being self-venting,
the rotor can does not require venting before start-up. Air inside the pump will be transported by
the medium into the system during the first minutes after pump start-up.
The system cannot be vented through the pump. As the pump is self-venting, it does not need to
be vented before start-up. however, it is recommended to vent pumps installed in systems where
the pumped medium is very dirty, as well as after service of the pump. The screw may be loosened
to check if the system has been vented completely.
When loosening the air-venting/de-blocking screw, be aware of hot, spraying water.
Operation panel
After power on, displayer in location 1 and location 2 works.
Failure that disables normal running of the pump (such as stagnation) will be displayed as “three green lights on”.
If failure displays, it has to cut off the power supply to troubleshoot. After troubleshooting, power on and start the pump.
Ι Mode display area in the pump
Ⅱ Button to select pump settings in the pump
Ⅲ Gear display area in the pump

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Lighting area that shows pump settings
Circulating pump has seven settings, which can be achieved through buttons.
Pressing times Lighting area Description Displayer icon
0 CS III
(Factory setting) Constant speed curve, speed III
1 PP I Proportional pressure curve, speed I
2 PP II Proportional pressure curve, speed II
3 PP III Proportional pressure curve, speed III
4 CS I Constant speed curve, speed I
5 CS II Constant speed curve, speed II
6 CS III Constant speed curve, speed III
7 PWM Automatic swich to this mode when
accsessing PWM signal
Trouble shooting
Ensure that the power supply is cut off and will not be accidentally swiched on before preparing any
maintenance and repair of the pump
Control panel Causes Troubleshooting method
Indicator lights off
a) fuse burned Replace the fuse
b) braker is off Put the braker on
c) pump is broken Replace the Pump
Three green lights on
simultaneously
over voltage or under
voltage
Check whether the power supply is
within the specified range
pump is blocked remove impurities
Lacking phase replace the pump
syort circuit Replace the Pump
Note: When the pump is running, the display panel will go out after 10s no operating, and then press any button to display again.

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It is forbidden to place, dispose of and store worn-out electric and electronic
equipment, together with other waste. Dangerous compound contained in electronic
and electric equipment have a very adverse impact on plants, micro-organisms, and,
most importantly, on humans, as they damage our central and peripheral nervous
system, as well as circulatory and internal system. Additionally, they cause serious
allergic reactions. Worn-out equipment is to be delivered to a local collection point for
used electric equipment, which carries out a selective collection of waste.
REMEMBER!
The user of equipment intended for households, and which has been worn out, is
obliged to transfer such equipment to a collecting unit that collects worn-out electric
and electronic equipment. The selective collecting and further processing of waste
from households contributes to the protection of environment, reduces the
penetration of hazardous substances into the atmosphere and surface waters.