VENCO VHR Series Manual

INSTALLATION –OPERATION &
MAINTENANCE INSTRUCTION
HEAT PUMP HEAT RECOVERY UNITS VHR MODELS
VENCO Havalandırma ve Makina San.ve Tic. A.Ş.
2004. Cad. No:5 45400 OSB Turgutlu –MANISA / TURKEY
Tel: [phone] Fax: [phone]
www.venco.com.tr [e-mail]
2015.09

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Index
1. INTRODUCTION...................................................................................................................................3
2. HEAT RECOVERY UNITS and VHR MODELS.....................................................................................3
Figure 2.1.1 VENCO VHR DX HEAT PUMP HEAT RECOVERY UNIT.....................................................3
Figure 2.2.1 Heat Pump Heat Recovery Units Parts .................................................................................4
3. TECHNICAL SPECIFICATION for HEAT RECOVERY UNITS..............................................................5
Table 3.1. VHR DX Heat Pump Heat Recovery Unit Technical Specifications ..........................................5
Table 3.2. Dimensions for VHR DX Heat Pump Heat Recovery Unit.........................................................6
4. WORKING CONDITIONS......................................................................................................................7
5. TRANSPORTATION –STORAGE –INSTALLATION...........................................................................7
5.1.Transportation ........................................................................................................................................7
Figure 5.1.1 Lifting Schema ......................................................................................................................7
5.2Storage..............................................................................................................................................7
5.3 Installation..........................................................................................................................................8
Figure 5.3.1. Connection Schema.............................................................................................................8
Figure 5.3.2. Installation Schema..............................................................................................................8
Figure 5.3.3. Installation Schema..............................................................................................................9
6. CONNECTIONS..................................................................................................................................10
6.1. Duct Connections.............................................................................................................................10
Figure 6.1.1 In.Free Outlet......................................................................................................................10
Figure 6.1.2. Ducted Outlet.....................................................................................................................10
Figure 6.1.3. Unit Duct Connection .........................................................................................................10
6.2. Drain Connections ...........................................................................................................................11
6.3. Electrical Connections......................................................................................................................11
7. SAFETY REQUIREMENTS.................................................................................................................12
7.1. Warnings and Precautions...............................................................................................................12
7.2. Warning Labels................................................................................................................................12
Figure 7.2.1. Manuel Label......................................................................................................................12
Figure 7.2.2. Electrical Warning Label.....................................................................................................12
Figure 7.2.3. Temperature Warning Label...............................................................................................12
Figure 7.2.4. Repair Warning Label.........................................................................................................13
Figure 7.2.5. Wiring Diagram Label.........................................................................................................13
Figure 7.2.6. Ground Label .....................................................................................................................13
Figure 7.2.7. Fan(Spinning) Label........................................................................................................13
Figure 7.2.8. Electrical warning Label...............................................................................................13

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Figure 7.2.9. Access door label...............................................................................................................13
Figure 7.2.10. Filter Access door label....................................................................................................13
Figure 7.2.11. Drain label........................................................................................................................13
Figure 7.2.12. Fresh Air label..................................................................................................................13
Figure 7.2.13. Exhaust air label...............................................................................................................13
8. CONTROLS BEFORE START UP ......................................................................................................13
8.1. Body ................................................................................................................................................13
8.2. Filters...............................................................................................................................................13
8.3. Heat Recovery Exchanger...............................................................................................................14
8.4. Fans and Motors..............................................................................................................................14
9. SAFETY WARNINGS..........................................................................................................................15
9.1. USING THE UNIT............................................................................................................................15
9.2. Warning Signs .................................................................................................................................16
9.3. Training of Technicians....................................................................................................................16
9.4. General Hazards Prevention............................................................................................................16
Table 9.4.1. General Hazards.................................................................................................................16
10. START-UP AND OPERATING.........................................................................................................17
10.1. Commissioning.............................................................................................................................17
10.2. Operating .....................................................................................................................................17
11. ELECTRONIC CONTROLLER BOARD...........................................................................................19
11.1. DX Controller................................................................................................................................19
Figure 11.1.1. DX Controller....................................................................................................................19
Table 11.1.1. DX Key Pads Controls.......................................................................................................19
12. MAINTENANCE...............................................................................................................................21
13. COMMISSIONING AND START UP................................................................................................21
14. SERVICE.........................................................................................................................................24
14.1. After Sales Service.......................................................................................................................24
15. APPENDIX.......................................................................................................................................25
15.1. DHR DX 3.0 Electrical Wiring Diagram (5-7-10-15-20-21-30 DX).................................................25
15.2. DHR DX 3.0 Electrical Wiring Diagram (40 DX)............................................................................26
15.3. DHR DX 3.1 PRO Electrical Wiring Diagram (40 DX)...................................................................27
16. Fuse and wiring selection ....................................................................................................................28

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1. INTRODUCTION
Installation, Operation and Maintenance Instruction concerns VHR DX heat pump heat recovery units
manufactured by VENCO. It consists of basic information and recommendation concerning the design,
technical specifications, installation, operation and maintenance of the heat pump heat recovery unit which
shall be obeyed to ensure proper operation of the unit. The key to proper and safe operating of the unit, read
thoroughly this instruction, use the unit according to guidelines given in it and follow all safety requirements.
The instruction should always be in proximity of the unit and within easy reach of the service technician.
2. HEAT RECOVERY UNITS and VHR MODELS
VENCO Heat Recovery Units are classified 8 different models; VHR 05 DX –07 DX –10 DX –15 DX - 20
DX –21 DX –30 DX –40 DX (Figure 2.1.). In all models, the housing is made from epoxy coated galvanized
sheet metal and the cabinet is fully insulated for sound and heat isolation.
Figure 2.1.1 VENCO VHR DX HEAT PUMP HEAT RECOVERY UNIT
READ THE INSTRUCTION BEFORE START-UP THE UNIT and KEEP THE MANUAL
CLOSE TO THE UNIT FOR EASY REACH OF SERVICE TECHNICIAN.
THE UNIT MUST BE OPERATED APPROPRIATE APPLICATIONS FOR PURPOSES
DESIGN AND TECHINICAL SPECIFICATIONS OTHERWISE THE REPONSIBILITY OF
ANY PROBLEM WILL NOT BE IN WARRANTY TERMS
THE UNIT MUST NOT USED IN THE ENVIROMENTS WHERE CORROSION and
EXPLOSIVE GAS EXIST
THE APPLIER WILL BE RESPONSIBLE FOR DEFECTS OCCURED DUE TO
OPERATING THE UNIT BY NOT AUTHORIZED PERSON or USING THE SPARE
PARTS WHICH ARE NOT ORIGINAL.

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Heat Pump Heat Recovery Units as standard consist of seven different parts as described; These parts
Exhaust Fan, Supply Fan, Fresh Air Filter, Exhaust Air Filter, Plate Type Heat Exchanger, Exhaust Coil and
Fresh Air Coil part, Compressor and Electrical Connection Box.
Figure 2.2.1 Heat Pump Heat Recovery Units Parts
DX Electronic Controller;
VHR DX type heat pump heat recovery units controlled by DX controller. The supply air fan and return air fan
are driven as 5 speeds with separately and with optionally added electrical heater can be set up with
electronic controller. Moreover electrical heater runs automatically through DX controller. Fresh air fan stop
running 30 seconds after to cool the electrical heater when the unit switch off.
DX controller has a protection system (optional) against the frost formation at the temperatures below -5°C,
and Pressure Sensor (optional) for clogged filter.
Moreover to DX, CO2sensor or air quality sensorcould be optionally connected. The fan speed automatically
changes by regarding to the sensor value.
Building Automation System;
DX controller has a digital input for Building Management System or VRF (VRV) System and also has a digital
output for the unit status information. Moreover, the unit can be controlled for all functions by the BMS or VRF
main control system through MODBUS.
Exhaust Air
Filter and
Fan Part
Compressor
Part
Fresh Air
Filter and
Fan Part
Heat Exchanger
Exhaust
Air Coil
Fresh Air
Coil
Electrical
Connection
Box

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3. TECHNICAL SPECIFICATION for HEAT RECOVERY UNITS
Technical specifications, which are valid for the heat pump heat recovery units are given in the table
below.
Table 3.1. VHR DX Heat Pump Heat Recovery Unit Technical Specifications
MODEL
VHR 05
DX
VHR 07
DX
VHR 10
DX
VHR 15
DX
VHR 20
DX
VHR 21
DX
VHR 30
DX
VHR 40
DX
Air Flow
m³/h
500
750
1000
1500
2000
2000
3000
4000
External Static Pressure(0
Pa)
Pa
165
188
223
226
181
262
168
300
ELECTRICAL DATA
Electrical Data
230Volt / 50Hz
400 Volt / 50 Hz
Fan Absorbed Power
W
2x102
2x155
2x225
2x515
2x515
2x550
2x550
2x1400
Cooling
Compressor
Absorbed Power
W
1050
1050
1400
2250
2800
2800
3410
4640
Total Absorbed
Power
W
1254
1360
1850
3270
3820
3820
4430
7040
Total Cooling
Capacity
W
3488
3751
4615
7460
9552
9552
13430
18460
Btu/h
11900
12800
15750
26070
32600
32600
45833
63000
Heating
Compressor
Absorbed Power
W
686
541
805
1362
1456
1456
2740
3370
Total Absorbed
Power
W
890
841
1425
2382
2476
2476
3760
5570
Total Heating
Capacity
W
5660
6760
8660
13910
17930
17930
24350
32240
Btu/h
19300
23050
29550
47450
61180
61180
83080
110000
Air Filter
Placed at fresh and exhaust air inlet - Cassette Filter

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Table 3.2. Dimensions for VHR DX Heat Pump Heat Recovery Unit
VENCO MODEL
VHR 05
DX
VHR 07
DX
VHR 10
DX
VHR 15
DX
VHR 20
DX
VHR 21
DX
VHR 30
DX
VHR 40
DX
Length [mm]
L
1140
1315
1350
1615
1810
1910
2000
2000
Width [mm]
W
900
950
1080
1330
1375
1525
1650
1650
Height [mm]
H
390
440
440
460
610
610
735
735
Duct Connection
[mm]
ød
200
200
250
300
355
355
400
450
Weight [kg]
89
112
165
263
300
325
420
520
Dimensions [mm]
W1
180
180
225
300
300
320
415
410
W2
395
415
450
382
410
410
357
378
W3
180
180
225
300
300
320
415
410
W4
385
415
450
356
413
410
357
378
Service Clearance
[mm]
Ls
700
700
700
800
900
900
1000
1000
4
L
W
H
W1
W2
W3
W4
ød
Ls
Indoor
Outdoor
Exhaust
Fresh Air
Exhaust
Fresh Air

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4. WORKING CONDITIONS
VENCO VHR DX heat pump heat recovery units effectively work at -5°C and +45°C for outdoor
conditions . The unit is not applicable to apply for the corrosive conditions. For different working conditions,
please contact with VENCO.
There is a frost protection kit exist to prevent freezing in heat exchanger at heat pump heat recovery units.
With the frost protection case; if the exchanger thermostat senses below -5°C, fresh air fan jumps to highest
speed, and exhaust fan drops to lowest speed. And there is a warning message “Frost Protection” popups
on the controller screen. The unit functions and the controller screen rolls back to normal situation, when the
exchanger thermostat senses above -5°C.
5. TRANSPORTATION –STORAGE –INSTALLATION
5.1.Transportation
All the products tests have done by VENCO before the product send to the customer. During
transportation, lifting and landing, heat recovery units are damaged especially due to wrong methods
usage. Appropriate lifting methods should be used in order to minimize any possible damage. Trans pallet
or forklift can be used for lifting or transporting small units. Lifting and transportation should be done with
trained and experienced personnel and security precautions should be taken to prevent the unit to fall over
or slide. During lifting and transportation of the unit, nobody should stay under the unit or in the front of the
unit (Figure 5.1.1) During the carriage, prevent any possible pressure can occure on top of the surface or
side covers of the device.
.
Figure 5.1.1 Lifting Schema
5.2 Storage
VENCO heat recovery units have to be kept in a closed area where the heat should be between –20 ºC
and + 40 ºC and relative humidity should not exceed 80%. Also the unit should be kept away from dust, gas,
corrosive streams and effects causing corrosion. Prepare the package considering to prevent any resulting
damage of electrical assembly, air inlet and outlet. Prepare a different package for more sensitive parts as
filters.

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5.3 Installation
VENCO rules should be implemented during the final assembly. Before the installing of heat recovery units,
customers should control whether weight and dimensions of the stations are suitable for the places from
where stations will pass through and assembly will be carried out. The unit has to be install horizontally, any
angle installation will cause a problem. There should be sufficient amount of place around the unit to be able
to give service and for piping connections. Heat recovery units should be assembled onto a hard and flat
base.
Damages due to wrong transportation-storage-installation are not covered under warranty.
Figure 5.3.1. Connection Schema
Figure 5.3.2. Installation Schema
INDOOR
Fresh Air
Flow
INDOOR
Exhaust
Suction
OUTDOOR
Fresh Air
Suction
OUTDOOR
Exhaust
Flow
Duct Type
Electrical
Heater
Connection Part
L = 2 D
Rot
Compressor
Cover
FAN and Filter
Service Cover
Electrical
Connection Box

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Figure 5.3.3. Installation Schema
Fan service
cover(Model 1)
Filter service
cover
Fan service
cover (Model 2)
Filter service
cover

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6. CONNECTIONS
6.1. Duct Connections
Return air, fresh air, exhaust air and supply air ducts should be fixed (connected) to the unit with flexible
connection. Required leak-proofing should be obtained in order to ensuredesirable air flow. Having improper
(bad) unit –duct connections and wrong dimension, shape and duct fragments inside of the connection may
cause turbulence.
Free Flowing Status; Centrifugal fan which is outgoing directly, is a poor efficient exhausting system That
turbulence can disappear with an additional duct or with an additional expansion part. It is more important
when the applications for orifice and distributor which use laminar method for pressure calculation.
Turbulence causes increasing the pressure loses. ( Figure 6.1.1).
Figure 6.1.1 In.Free Outlet
It is very important to make the connection between flowing the unit connection and flexible connection
carefully to prevent noise and vibration Fan input and duct axis have to be proper and flexible connection
should not be an accordion. Air passage has to be smooth. (Figure 6.1.2).
Figure 6.1.2. Ducted Outlet
.
Figure 6.1.3. Unit Duct Connection
When air flow direction is changed at fan blowing outlet, excessive losses may occur. If this is compulsory,
connections should be done as Figure 6.1.4. The length of duct, before the elbow or electrical heater, should
be double of the outlet-diameter

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Figure 6.1.4. Unit Outlets when the air flow direction change
6.2. Drain Connections
The diameter of drain pipe should be equal the diameter of drain pipe on the unit.
Drainage pipe and drain pan connections should be made by ripple and flange to
be able to dismantle pipe connections easily in order to clean up the residue
occurred on drain pan and pipes.
The pipe coming out of the drain pan should be connected to a U or P shaped
flusher pipe and should be filled with water in order to not to cause air suction as
described left side.
6.3. Electrical Connections
The electrical materials, cables and all relevant control and remote control equipment should be chosen and
designed suitable to unit requirements. All the cables belong to equipment’s has to set properly not to give
any damage to the product. Puncture of product can cause water leakage or air leakage. Repairment of the
ALL ELECTRICAL CONNECTIONS SHALL BE DONE ACCORDING TO EN 60204-1
BY TRAINNED AND AUTHORIZED PERSONEL
ALL HEAT RECOVERY UNITS HAVE ENERGY CABLE ON THEM. PLUG, PLUG FUSE
AND CABLE CROSS SECTION HAVE TO BE CHOSEN PROPERLY.
THE GROUND CONNECTION HAS TO BE DONE. UNIT GROUND CONNECTION HAS
TO BE DONE ON ENERGY CABLE AND IT HAS TO BE DONE FROM GROUND
CAPSCREW ON THE BODY.

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inside insulation has to be done immediately if any damage occurs. The particles have to be removed if there
is any inside the unit. These kind of products cause corrosion especially in the high humidity conditions. For
unit electrical connections, put the safety fuse to the main supply board.(for capacity list , go to document
APPENDIX-4 )
All the electrical connections have to be appropriate to given document APPENDIX-4.
7. SAFETY REQUIREMENTS
7.1. Warnings and Precautions
All the safety precautions were taken for usage of these devices. However, the unit can be dangerous if
the unit is not used or the service is given by non trained and unexperienced technicians, and indicated
security precautions are not followed. For this reason, the necessity was felt to explain security rules of heat
pump heat recovery units and explain possible dangers and precautions.
–Never expose the unit to moisture, strokes and external effects.
–Don’t use your products in explosive and corrosive conditions.
–The unit should be maintained by trained technicians.
–Do not repair or adjust, while the unit is running.
–Turn the electrical switch off and wait for the motor blades stop, before open the unit. Waitfor two minutes
minimum
–Never expose fans, cables and connections to the water.
–If the outsidetemperature is less than -30°C, the unit must be stopped. The condense water can be frozen
at the temperature less than -30°C, it can be damaged to the exchanger.
–Do not operate the unit, when the access doors are open and the duct connections are not completed.
7.2. Warning Labels
Necessary warning labels are placed on to unit for the users or service personnel. When the unit is put into
the operation, following stickers have to be controlled whether they are existing or not.
Safety Labels:
Figure 7.2.1. Manuel Label
Figure 7.2.2. Electrical Warning
Label
Figure 7.2.3. Temperature
Warning Label

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Figure 7.2.4. Repair Warning
Label
Figure 7.2.5. Wiring Diagram
Label
Figure 7.2.6. Ground Label
Figure 7.2.7. Fan(Spinning)
Label
Figure 7.2.8. Electrical warning
Label
Figure 7.2.9. Access door label
Figure 7.2.10. Filter Access door
label
Figure 7.2.11. Drain label
Figure 7.2.12. Fresh Air label
Figure 7.2.13. Exhaust air label
Figure 7.2.14. Air flow direction
label
8. CONTROLS BEFORE START UP
Please make sure that all electricity cables are made according to (EN 60204 -1) standards and security
and protection units belong to all elements. Please make sure that all parts of the unit are clean. There
can be duct insulation residuals, bands etc.
8.1. Body
Please check the inside of product, are there any particles which can damage the unit. Please check both
inside and outside of product are there any damages were happened because of mechanical reasons. If yes,
please note the main reason and apply the precautions not to go wider. If necessary please contact with
VENCO.
8.2. Filters

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Maintenance of the filters should be done regularly. Dirty filters can decrease air flow and
consequently the capacity. Synthetic or metal filters can be cleaned or washed. However it is advised to
change synthetic filters every two years.
8.3. Heat Recovery Exchanger
Is controlled before transportation. The plates of heat recovery exchanger should be checked, after
transportation.
8.4. Fans and Motors
Wiring shall be done, according to international standards. The turning way of fan-blades should be
checked, according to the air-flow direction label on the fan.

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9. SAFETY WARNINGS
VENCO heat pump heat recovery units are produced in accordance with EN 60204-1 standards and to
fulfill the requirements MD 98/37 of the European Directives. The products have CE mark.
This user manual is prepared to provide correct usage and assembling of the heat recovery unit and warn
the maintenance personnel for the possible dangers they may occur. Apart from instructions and warnings of
the producers, legal rules and standards have to be taken into consideration as well.
The moving parts inside the unit (fan, motor, etc.) and electrical components where regions are considered
to be hazardous areas. Appropriate equipment and protective materials should be used in these areas to
work
Potential hazards related to heat recovery units evaluated in three groups.
–.The hazards for operator
–The hazards for unit damages.
–The hazards for unit working efficiency
9.1. USING THE UNIT
VENCO Heat Pump Heat Recovery Ventilation units, as well as providing energy savings, has been
designed to achieve a high quality of indoor air. Use for other purposes is deemed as illegal. In such cases,
the user will be completely responsible any possible damages that will arise.
The unit cannot be used to ventilate flammable and combustible gases. Transportation, installation and
operating instructions must be followed carefully in order to use the unit specified.
Commissioning and installation procedures must comply with the standards in force in the country of the
user. User is responsible to fulfill all requirements mentioned in this manual. Moreover the users have to
hesitate any kind of working method which contains risks. Any changes on the device by the user or the
operator are strictly prohibited. Warranty does not cover any type of damage will be caused by the changes
Installation, start up, and maintenance works can only be done by authorized and trained technicians. The
technician has to be informed by the owner of the unit or it’s user about possible dangers.
Electrical fuse must be off during the maintenance activities.

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9.2. Warning Signs
Warning labels are put on the unit for operating and maintenance persons. Check the location of labels
when the devices are ready to start up, are they appeal or not.
–Repair and maintenance is ban label while unit is operating
–Power cut off warning label on the device before opening the door
–Electrical parts warning label
9.3. Training of Technicians
Installation, start-up and maintenance works can only bedone byauthorized andtrainedtechnicians. The
technician has to be informed by the owner of the unit or its user about possible dangers he/she may face
during following phases:
Electrical Connections
Duct Connections
Putting Into Operation
Maintenance
For the continuity of the warranty, control and maintenance responsibilities have to be accepted and followed
strictly. You can apply to VENCO A.S. to train your authorized technicians.
9.4. General Hazards Prevention
Heat recovery units service cover is screwed to the unit. Thus, with the danger of unauthorized persons
are prevented to reach inside the unit. The most important potential hazards to human life and health are
described below. Units are manufactured in accordance with the Machinery Directive 89/392/EEC. If the user
wants to take further precautions to avoid possible damages the following table must be considered.
Table 9.4.1. General Hazards
HAZARD TYPE
HAZARD SOURCE
HAZARD
Don’t touch moving parts
Fan, electrical motors
İnjury Risk
Don’t touch which is
electrical
Electrical parts electrical
cables
Vital Risk

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10. START-UP AND OPERATING
10.1. Commissioning
Instructions have to be followed before operating the unit for the first time (or after yearly
maintenance). Additionally, following checks have to be done.
Please make sure that all parts of the unit are clean. There can be duct insulation residuals, bands etc.
Please make sure that all electrical cables are connected according to (EN 60204-1) standards and
security and protection units belong to all elements
CABINET; Make sure that the clean up all the parts of heat recovery unit. Check the service covers are
installed at the correct places.
FILTERS;. All filters must be put inside the unit.
HEAT RECOVERY EXCHANGER;. Check the surface of battery if any pieces on it. Fill the pan with water
to control the draining and make sure that the siphon is not obstructed.
FAN and MOTOR GROUP; Before commissioning of unit, the fan and motor mounting screws should be
checked carefully. After switching on the unit, the sound should be listened. Motor current values should be
checked with label values whether it is appropriate.
10.2. Operating
After maintenance and service manufacturer's instructions should be followed. In addition please check
the below introductions
–. Check the fan and the motor spins freely.
–Check the fan at the entrance for any residual.
–Fan and motor connections.
–Check duct connections in accordance with manufacturer recommendations and check if they are
designed in accordance with acceptable engineering practice.
–Check the service doors closed and the filters are installed. If the unit will start up while the service doors
are open, the fans will take excessive current and fan motors may burn out.
Check the following points carefully: Provide electricity and run the fan to operate in the highest speed.
–Check unexpected noise
–Motor current and voltage values
Stop the operation immediately if any problem appears. Turn off the power. Please check the reason of the
problem and, correct it. Check the motor current, and check whether it matches the value on the motor label.

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WARNING:
Check whether any changes at the fan. A more detailed explanation of the problems and the possible causes
of these problems is given in "troubleshooting" section. For questions about the changes during periodic
observations, you can contact VENCO or other competent adviser.
Make the fan stop until to fix if any vibration appears at fan.
–The changes of sound level at fan can be a sign to fix a failure.
–Changes in current drawn by the motor indicate a problem with the system. Increase at the current, the
system may indicate that large-scale changes.

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11. ELECTRONIC CONTROLLER BOARD
11.1. DX Controller
VENCO DX heat recovery device used to control the fresh air fan FAN1 (5 step+auto), the exhaust air
fan FAN2 (5 step+auto), the selection of mode (heating cooling, fan and auto). İnformation on the control
keys are given in the following template.
Figure 11.1.1. DX Controller
Table 11.1.1. DX Key Pads Controls
Button
Name
Description
ON / OFF
Unit will be ON or OFF.
MODE
Select Running Status
(Cool , Heat Fan ,Auto)
FAN
Fan1 and FAN2 stepped control
button.
Value Increase
Increases of the set value.
Increases the value of selected by
fan button area.
Value Decrease
Decreases of the set value.
Decreases the value of selected by
fan button area.