Enviro-tex EVI35000 User manual

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Enviro-tex Commercial EVI Series - Air Source Heat Pumps
Installation and Users Guide
IMPORTANT SAFETY INSTRUCTIONS
READ AND FOLLOW ALL INSTRUCTIONS
RETAIN THIS GUIDE FOR FUTURE REFERENCE

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Enviro-Tex Commercial EVI Series
Installation and User Guide
Customer Service
If you have any questions about ordering Air Source Heat Pump replacement parts and products,
please get in touch.
Customer Service and Technical Support
(Open from 9am-4pm Monday- Friday)
Phone: [phone]
Email: [e-mail]
Address: 169-177 Cleethorpe Road, Grimsby, DN31 3AX
Website:
www.enviro-tex.co.uk

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Table of Contents
IMPORTANT SAFETY PRECAUTIONS............................................................................................... 5
Health and Safety (Materials)................................................................................................... 5
Important End User Safety Information................................................................................... 7
Section 1........................................................................................................................... 8
Introduction................................................................................................................................... 8
Product Overview..................................................................................................................... 8
General Features....................................................................................................................... 8
Section 2........................................................................................................................... 9
Installation..................................................................................................................................... 9
Materials needed for installation.............................................................................................. 9
Installation of Outdoor Unit.................................................................................................... 10
Suggested Installation Methods............................................................................................. 11
Water Connections................................................................................................................. 14
Plumbing Installation Requirements....................................................................................... 14
Electrical Connections............................................................................................................. 15
General Information............................................................................................................... 15
Electrical Wiring Diagram........................................................................................................ 16
Power Supply.......................................................................................................................... 17
Grounding and Over Current Protection................................................................................ 17
Controller PC Board Setting.................................................................................................... 17

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Section 3......................................................................................................................... 18
Operating Heat Pump................................................................................................................... 18
LCD User-Friendly Interface Controller................................................................................... 18
General Instruction................................................................................................................. 18
Controller Panel...................................................................................................................... 18
Controller Set-up.....................................................................................................................19
1. Temperature Setting........................................................................................................ 19
2. System Status Display Value............................................................................................. 20
3. Clock Setting..................................................................................................................... 21
4. Timer Setting.................................................................................................................... 22
5. Manual/Forced Defrosting............................................................................................... 23
General Operating Guide..................................................................................................................... 23
Users Guide.......................................................................................................................................... 24
Product Protection............................................................................................................................... 24
Section 4......................................................................................................................... 26
General Maintenance.................................................................................................................. 26
Controller Error Codes........................................................................................................... 26
Inspection and Service........................................................................................................... 27
Owner Inspection................................................................................................................... 27
Trouble Shooting.................................................................................................................... 27
Problems and Corrective Action............................................................................................. 28
Section 5......................................................................................................................... 35
Components Assembly................................................................................................................. 35

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HEALTH AND SAFETY INFORMATION
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INFORMATION FOR INSTALLER AND SERVICE ENGINEERS
Under the Consumer Protection Act 1987 and the Health and Safety at Work Act 1974, it is required
to provide information on substances hazardous to health (COSHH Regulations 1998).
Enviro-Tex takes every reasonable care to ensure that these products are designed and constructed
to meet these general safety requirements, provided they are properly installed and used.
To fulfil this requirement, products are comprehensively tested and examined before dispatch.
When working on the appliance, it is the responsibility of the user/engineer to ensure that any
necessary personal protective clothing or equipment is worn when appropriate for parts, which
could be considered hazardous or harmful.
This appliance may contain some of the items below:
Refrigerants
The appliance contains R407c refrigerant. The constituents of R407c are HFC’s R125, R134a and R32,
all of which have low toxicity levels.
When handling, avoid inhalation and contact with the skin and eyes. Suitable personal protective
equipment (PPE) must be worn (gloves, overalls, eye protection) and a comprehensive first aid kit
(containing eyewash) should be easily available.
Site engineers should have a certificate of competence and should know and understand the
properties and hazards before handling liquid refrigerants.
When the appliance has come to the end of its life span, an approved engineer must dispose of the
equipment and refrigerants in accordance with the EU laws.
Seek urgent medical attention if in haled or digested. Exposure to eyes and skin should be followed
by immediate cleansing of the affected areas and medical attention if necessary.
Insulation
Fibre insulation may be irritating to the skin, eyes, nose and throat. When handling, avoid inhalation
and contact with the eyes. Use disposable gloves, facemasks and eye protection.
After handling, wash hands and other exposed parts. When disposing, reduce dust with water spray
and ensure all parts are securely wrapped.
Glue, Sealants and Paints
Glue, sealants and paints are used in this appliance and present no known hazards when used in the
manner of which they are intended.

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IMPORTANT SAFETY INFORMATION FOR THE END-USER
•Installation of the appliance must only be carried out by persons with suitable
engineering qualifications.
•Do not attempt to modify, repair or service the appliance yourself.
•Do not insert body parts or any other items into the air inlet or outlet.
•Do not start or stop the unit by removing the power cable; always use the controls
and switches provided.
•If installed outside, ensure the appliance is protected from prolonged exposure to
large quantities of water.
•Do not operate the unit or the programmer with wet fingers.
•Upon replacement of the fuse, ensure an adequate replacement is used (e.g not
fuse wire)
•Keep the programmer unit of out of reach of children.
•The electrical supply must be isolated during a heightened risk of lightning strikes.
•Do not attempt to move the appliance once it is installed; this must be carried out
by a qualified engineer.
•Isolate the electrical supply to the appliance if an odour presents, or scorching is
detected.
•Only use this appliance for the purpose intended.
•Ensure the area around the appliance is clean, well-ventilated and kept free of all
obstructions.
•Do not keep items on top of the appliance or use it to support other appliances.
•Do not under any circumstances stand on the appliance.
•Isolate the electrical supply to the appliance if it is to be switched off for a period
of more than two weeks.
•Drain the water from the water circuit if power to the unit is to be switched off
during very cold weather.
•Periodically check the condition of any supports for deterioration.
•Do not wash the unit with water, alcohol, benzene, thinner, glass cleaner, polish or
powders.
•During cleaning, isolate the electrical supply to the appliance.

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Section 1
Introduction
Product Overview
Air Source Heat Pumps transfer heat from the ambient air to water, providing high-temperature hot
water up to 60°C. The unique Enviro-tex heat pump is widely used for house heating.
With our innovative & advanced technology, the EVI range of heat pumps can operate very well at
-25°C ambient temperature with high output temperatures up to 60°C, which ensures the
compatibility with normal sized radiator based systems without supplementation. Compared with
traditional oil/LPG boilers, Enviro-Tex high-temperature heat pump produces up to 50% less CO²
whilst saves up to 80% on running costs. Enviro-Tex heat pumps are not only highly efficient, but
also easy and safe to operate.
General Features
1. Low running costs and high efficiency.
•A high coefficient of performance (COP) of up to 5, results in lower running costs
compared with traditional ASHP technology.
•No immersion heater supplement is required.
2. Reduced Capital Costs.
•Simple installation
•Compatible with traditional radiator systems, eliminating the expense of installing
under floor heating or changing to oversized radiators.
3. High Comfort Levels.
•High storage temperature results in increased hot water availability.
4. No potential danger of any inflammable, gas poisoning, explosion, fire, electrical shock
which are associated with other heating systems.
5. A digital controller is incorporated to maintain the desired water temperature.
6. Long-life and corrosion resistant composite cabinet stands up to severe climates.
7. The latest EVI compressor ensures outstanding performance, ultra energy efficiency,
durability and quiet operation.
8. Self-diagnostic control panel monitors and troubleshoots heat pump operations to ensure
safe and reliable operations.
9. Intelligent digital controller with friendly user interface and blue LED back light.
10. Separate isolated electrical compartment prevents internal corrosion and extends heat
pump life.
11. The heat pump can operate down to ambient air temperature of -25°C.

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Section 2
Installation
The following general information describes how to install the air source heat pump.
Note: Before installing this product, read and follow all warning notices and instructions. Only a
qualified / competent person should install the heat pump.
Materials needed for Installation:
The following items are needed and are to be supplied by the installer for all heat pump
installations:
1. Plumping fittings.
2. Level surface for proper drainage.
3. Ensure that a suitable electrical supply cable is provided. See the rating plate on the heat
pump for electrical specifications. Please take a note of the specific current rating. No
junction box is needed at the heat pump; Connections are made inside of the heat pump
electrical compartment. Conduit may be attached directly to the heat pump jacket.
4. It is advised to use PVC conduit for the electrical supply cables.
5. Use a correctly sized water pump to obtain minimum water flow rate.
6. A filter on the water inlet is needed.
7. The plumbing should be insulated to reduce heat losses.
Note: We recommend installing shut-off valves on the inlet and outlet water connections for ease of
serviceability.
Enviro-tex EVI Series Air Source Heat Pump Specification
Model EVI35000 EVI65000 EVI80000
Water Outlet Temp at 35/45°C
Ambient
Temp.
(20°C)
Normal Capacity
kW
35/33
64.9/59.8
79.3/72
Power Input
kW
8.52/9.3
16.4/18
19.8/21.8
COP
4.1/2.65
4.1/3.7
4.2/3.66
Ambient
Temp.
(7°C)
Normal Capacity
kW
29.1/27
54.5/50
68.5/62
Power Input
kW
8.2/9
15.8/17.5
19.4/21
COP
3.6/3.2
3.5/3.3
3.6/3.2
Max Power Input kW 11.5 21.8 42/46
Power Supply V/Ph/Hz 380~415/3/50 380~415/3/50 380~415/3/50
Rated Current A 12.7 24.3 30.3
Rated Water Flow m³/H 6.5 11.5 18.3
Rated Water Temp. °C 55
Max Water Temp. °C 60
Refrigerant R407C/2x4/0kg R407C/2x7.2kg R407C
Compressor
Copeland Scroll EVI
Net Weight
Kg
258
459
820
Dimensions
mm
1420x810x1050
1980x970x2070
1980/980/2070
Water Connections:
2”
3”
4”
Ambient Temp.
°C
-25~40
Noise
dB(A)
≤67
≤69
≤69
Note: The above design and specifications are subject to change without prior notice for product
improvement. For detailed specifications of the units please refer to name plate on the units.

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Correct installation is required to ensure safe operation. The requirements for Enviro-Tex heat
pumps include the following:
1. Appropriate site location and clearances.
2. Wiring to conform to 17th edition wiring regulations.
3. Adequate water flow.
This manual provides the information needed to meet these requirements. Review all application
and installation procedures completely before continuing the installation.
Installation of Outdoor Unit
The heat pump should be installed on a solid level base that can take the weight, preferably a
concrete foundation. If concrete slabs are used they must rest on asphalt or shingle.
The heat pump should not be positioned next to sensitive walls, for example, next to a bedroom.
Also ensure that the placement does not inconvenience the neighbours. The heat pumps must not
be placed so that recirculation of the outdoor air can occur; this causes lower output and impaired
efficiency.
Large amounts of condensation water as well as melted waters from
defrosting can be produced. Condensation water must be led off to a
drain or similar.
The outdoor unit should be installed in a ventilated place, with enough
space for air inlet and outlet, while without thermal radiation or other
heat source. The air outlet should not be against the wind.
Generally, horizontal air flow type heat pump does not need sheltering.
The structure design has protected all internal components against rain
and sunshine. A shelter is necessary to avoid snow burying the heat
pump in heavy snow areas.
Please make sure the standardized voltage 380-415v is available to the
heat pump, otherwise the performance would be influenced and could affect your warranty.

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The foundation of the heat pump can be a cement or steel structure. Anti-vibration rubber feet and
a flat foundation are generally required. The foundation structure can be flexibly designed according
to the working weight of the heat pump. (Please see the technical data in this manual.)
Water drainage should be available near the installation location for draining water in an effective
way. Do not install the heat pump in a place where there is polluting or corrosive materials like oil,
flammable and explosive gas and sulphide ect. Keep it far away from sands, falling leaves and area
with high-frequency equipment.
Installation on a balcony or on a roof-top must be in accordance with the allowable stress of the
building structure.
The installation space should be referred as follows:
Intake and outlet should not be obstructed. The wall the unit is to be mounted on should be strong
enough to bear the weight and vibrations of the unit.
Allow for proper clearances around the unit. Location should allow easy access for maintenance.
For any further guidance on heat pump installations for planning purposes, please consult the latest
version of the MCS guidelines or your local authority.

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Suggested Installation Methods
1. For hot water only / buffer tank, low loss header or thermal store installations, with or
without a coil. (See Figure 3)
The system is controlled by the programmer supplied and the thermostat probe only.
Please ensure this is properly located within the buffer or header.
(Figure 3)

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2. For direct heating only installation (See Figure 4)
The system is controlled by the programmer supplied and the thermostat probe only.
Please ensure this is properly located within the buffer or header.
The water flow rate through the unit must meet the minimum amount set.
(Figure 4)
Water Connections
Water connections at the heat pump
Flexible pipe fittings are recommended to be installed on the flow and return connections. (See
Figure 3).
(Figure 5)

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The water inlet and outlet connections to the heat pump, accept standard BSP threaded fittings.
CAUTION – Make sure that water flow rates can be maintained with the installation of
additional heat pumps and plumbing restrictions.
Plumbing Installation Requirements
1. Water pressure should not exceed 3 Bar.
2. Each part connected to the unit needs to be connected with method of loose jointing and
installed with intermediate valves.
3. Ensure that all plumbing has been properly flushed and tested.
4. All pipelines and pipe fittings must be insulated to prevent heat losses.
5. Install a drain valve at the lowest point of the system to enable the system to be drained
fully.
6. Install a check valve on the water outlet connection in back siphoning could occur.
7. In order to reduce the back pressure, the pipes should be installed horizontally.
8. Install an automatic bypass valve when connecting directly to a system (no buffer).

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Electrical Connections
WARNING – Risk of electrical shock or electrocution.
Ensure that all high voltage circuits are disconnected before commencing heat pump installation.
Contact with these circuits could result in death or serious injury to users, installers or others.
CAUTION – Label all wires prior to disconnection when servicing the heat pump. Wiring errors
can cause improper and dangerous operation. Check and ensure proper operation after servicing.
General Information
Wiring connections must be done according to the wiring diagram found on the inside of the heat
pump access panel or see addendum A for reference.
The heat pumps must also be earthed. A ground lug is provided on the inside of the heat pump
electrical compartment.
The supplied controller is pre-wired using a low voltage low loss cable and can be easily moved and
located where required.
The controller plugs directly onto the cable supplied with no additional wiring required.
If you wish to extend this cable or any of the sensor cables, please use a shielded low loss cable.

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Wiring Diagram
Three Phase: EVI35000

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Three Phase: EVI65000/ EVI80000
Power Supply

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1. If the supply voltage is too low or too high, it can cause damage and/or result in unstable
operation of the heat pump unit, due to high in rush currents on start up.
2. The minimum starting voltage should be above 90% of rated voltage. The acceptable
operating voltage range should be within ±10% of the rated voltage. When heat pump units
are installed in parallel, ensure that the voltage difference, between these units, is within
±2% of each other. The voltage difference between phases of a three phase power supply
should be within ±2%.
3. Ensure the cable specifications meet the correct requirements for the specific installation.
The distance between the installation site and the mains power supply will affect the cable
thickness. Follow the 17th edition wiring regulations to select the cables, circuit breakers and
circuit breakers.
Earthing and Over Current Protection
In order to prevent electrical shock in case of leakage from unit, install the heat pump according to
current electrical wiring regulations.
1. Do not frequently interrupt the voltage supply to the heat pump as this may result in a
shorter life expectance of the heat pump.
2. When installing over current protection, ensure that the correct current rating is met for this
specific installation.
3. The compressor, fan coil unit and heat pump water pump all have AC- contactors and
thermo relay protection. Therefore, in the process of installation and debugging, firstly
measure each of the aforementioned components’ current, and then adjust the current
protection range of the thermo relays.
Controller PC board Settings
The Controller PCB has a pin selectable toggle switch which must be set according to the specific
installation requirement.
Note: Before any changes are made to the pin settings, ensure that the mains supply
power is OFF at the circuit breaker or physically disconnected from the mains supply.

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Section 3
Operating Your Heat Pump
LCD User-Friendly Interface Controller
General Instructions
The operation panel features:
1. Capacitive touch keys for higher operating sensitivity and unlimited key operations.
2. Minimal electromagnetic susceptibility and interference.
3. Stylish appearance of easy viewing purposes.
4. Dust and Water Proof.
5. Install on wall indoor for convenient operation.
6. Automatic Key Lock Function (AKL).
Controller Panel
Operating Controller
Operation Guide
When the power supply to the heat pump is switched on for the first time, an audible tone is heard
from the controller. The LCD will be displayed in a dimming mode (no back light). At this time the
touch keys are locked (see “lock key display” symbol).

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Keys Explanation:
Unlocking Keys: Press the “power” key for 3 seconds until you hear the audible tone, then release
the key. The backlight of the LCD display will turn on and the key pad is locked with no “lock key
display” symbol. The key pad will automatically lock after 60 seconds, displaying the “lock key
display” symbol.
“Power” keys: By pressing the “power” key, the unit can be switched ON and OFF.
“▲” and “▼” keys: Press to increase and decrease values.
“Setting” key: Press for inquiry, parameter and password setting.
“Timer” key: Press for timer setting, timer eliminate and clock settings.
Controller Set-Up
1. Temperature Setting:
Make sure key-pad is unlocked. Press the “▲” key, “temperature setting” symbol is flashing and
the set temperature is displayed. Press the “▲” key again, the displayed temperature will
increase. Press the “▼” key, “temperature setting” symbol is flashing and the set temperature is
displayed. Press the “▼” key again, the displayed temperature will decrease. The range of water
temperature can be set from 20°C (68°F) to 60°C (140°F) (default = 60°C (140°F)).
NOTE:
•It is recommended that the maximum setting temperature to 60°C

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2. System Status display values:
Make sure key-pad is unlocked. Press the “setting” key and enter into the inquiry panel with
“inquire” symbol on display.
On the state of power on, press the “setting” key for more than 3 seconds, until an audible tone is
heard and enter into the setting panel with “setting” symbol on display. After parameter set, press
the “setting” key again for next parameter setting, after all parameters set, exit the setting panel.
Details are shown as follows:
Code Name Range Default
Water tank temperature setting 20℃─60℃55, Change to 20 for no
domestic hot water function
(Method 3.)
L1 Temperature difference between
hot water and indication
0℃─15℃0
L2 Decreasing water temperature
difference to restart Compressor
3—18 4
L3 Inlet water temperature of heating 20℃─55℃35, Set to 20 for no heating
function. (Method 2.)
L4 Maximal water tank temperature 30--99 55
L5 Ambient temperature to start
electric heating
0℃─35℃7
L6 NO NO NO
L7 NO NO NO
L8
Compressor overload current
setting
0~33A XX, (where 0 means no current
protection)
L9
NO NO NO
h1
Defrosting period 20─99min 40 min
h2
Ambient temperature to start
defrosting function
-15℃─1℃-1℃