Mitsubishi Electric EHST20 Series Installation manual

CYLINDER UNIT
EHPT20 series
EHST20 series
ERPT20 series
INSTALLATION MANUAL
FOR INSTALLER
For safe and correct use, read this manual and the indoor unit installation manual thoroughly before installing
the cylinder unit. English is original. The other languages versions are translation of the original.
INSTALLATIONSHANDBUCH
FÜR INSTALLATEURE
Aus Sicherheitsgründen und zur richtigen Verwendung vor der Installation des Speichers die vorliegende Bedienungsanleitung und die
Installationsanleitung der Inneneinheit gründlich durchlesen. Das Original ist in Englisch. Die anderen Sprachversionen sind vom Original übersetzt.
MANUEL D’INSTALLATION
POUR L’INSTALLATEUR
INSTALLATIEHANDLEIDING
VOOR DE INSTALLATEUR
MANUAL DE INSTALACIÓN
PARA EL INSTALADOR
MANUALE DI INSTALLAZIONE
PER L’INSTALLATORE
MANUAL DE INSTALAÇÃO
PARA O INSTALADOR
INSTALLATIONSMANUAL
TIL INSTALLATØREN
INSTALLATIONSMANUAL
FÖR INSTALLATÖREN
Pour une utilisation correcte et sûre, lisez soigneusement ce manuel et le manuel d’installation de l’appareil l’intérieur avant d’installer
le module hydraulique combiné. L’anglais est l’original. Les versions fournies dans d’autres langues sont des traductions de l’original.
Lees voor een veilig en juist gebruik deze handleiding en de installatiehandleiding van de binnen-unit aandachtig door voordat u
met de installatie van de cilinder-unit begint. Het Engels is het origineel. De andere taalversies zijn vertalingen van het origineel.
Para un uso correcto y seguro, lea detalladamente este manual y el manual de instalación de la unidad interior antes de instalar la
unidad cilindro. El idioma original del documento es el inglés. Las versiones en los demás idiomas son traducciones del original.
Per un utilizzo sicuro e corretto, prima di installare l’unità del bollitore leggere attentamente questo manuale e quello di installazione
dell’unità interna. Il testo originale è redatto in lingua Inglese. Le altre versioni linguistiche rappresentano traduzioni dell’originale.
Para uma utilização segura e correcta, leia este manual e o manual de instalação da unidade interior antes de
instalar o cilindro. O idioma original é o inglês. As versões em outros idiomas são traduções do idioma original.
Af hensyn til sikker og korrekt brug skal denne vejledning og vejledningen til indendørs installation læses omhyggeligt,
inden cylinderenheden installeres. Engelsk er originalen. De andre sprogversioner er oversættelser af originalen.
För säker och korrekt användning, läs denna manual och inomhusenhetens installationsmanual innan du
installerar tanken. Engelska är originalspråket. De övriga språkversionerna är översättningar av originalet.
INSTALLERINGSHÅNDBOK
Deutsch
Français
Nederlands
Español
Italiano
Português
Dansk
Svenska
FOR MONTØREN
For å sikre en trygg og riktig bruk skal du lese denne håndboken og installeringshåndboken for innendørsenheten grundig
før du monterer sylinderenheten. Originalspråket er engelsk. De andre språkversjonene er oversettelser av originalen.
ASENNUSOPAS
English
Norsk
ASENTAJALLE
Lue turvallista ja asianmukaista käyttöä varten tämä opas ja sisäyksikön asennusopas huolellisesti ennen
varaajayksikön asentamista.
Suomi
Contents
1. Safety Notices ................................................... 3
2. Introduction....................................................... 4
Water Circulation Pump Characteristics ....................... 13
Safety Device Connections ........................................... 13
Overview of the System .................................................. 4
How the Heat Pump Works............................................. 4
Overview of the Controls ................................................ 5
4.4 Safety Device Discharge Arrangements (G3).........14
4.5 Refrigerant Pipe work ........................................ 15
3. Technical Information ...................................... 6
4.6 Electrical Connection ......................................... 16
Product specification ....................................................... 6
Component Parts ............................................................ 7
Technical Drawings ......................................................... 9
Unit Compatibility .......................................................... 10
4. Installation....................................................... 11
4.1 Location ...............................................................11
Transportation and Handling ..........................................11
Suitable Location ...........................................................11
Service access diagrams ...............................................11
Room Thermostat ..........................................................11
Repositioning .................................................................11
4.2 Water Quality and System Preparation ............11
General ..........................................................................11
New Installation .............................................................11
Existing Installation ........................................................11
How to access Internal Components and Control Box...... 12
4.3 Water Pipe work................................................. 12
Hot Water Pipe work ..................................................... 12
Cold Water Pipe work ................................................... 12
Pipe work Connections ................................................. 12
Insulation of Pipe work .................................................. 12
Filling the System (Primary Circuit)............................... 12
Sizing Expansion Vessels ............................................. 12
Accessories (Included)
Main controller cover
Adjustable feet
Precautions ................................................................... 15
Connecting Pipes .......................................................... 15
5. System Set Up ................................................ 20
5.1 DIP Switch Functions ......................................... 20
5.2 Connecting external input/output ........................ 21
5.3 Remote Controller Options ............................... 22
Remote Installation of Main Controller .......................... 23
5.4 Main Controller ................................................... 24
Setting the Main Control ............................................... 26
Initial Settings .............................................................. 26
Main Settings Menu ...................................................... 26
Mode 1 - DHW/Legionella Prevention .......................... 27
Mode 2 - Heating/Cooling ............................................. 28
Mode 3 - Schedule ........................................................ 30
Service Menu ................................................................ 31
6. Commissioning............................................... 35
Pre-commissioning Checklist ........................................ 35
7. Service and Maintenance............................... 36
Basic Troubleshooting for Cylinder Unit ........................ 36
Annual Maintenance ..................................................... 36
Error Codes................................................................... 37
Engineers Forms .......................................................... 38
Annual Maintenance Log Book ..................................... 39
Immersion heater boss tool
E******-*M*H*
model only
1
4
1
Abbreviations and glossary
Abbreviations/Word
Description
Ambient temperature
Freeze stat. function
ASHP/HP
COP
Cylinder unit
DeltaT
DHW mode
Flow rate
Flow temperature
FTC3
Compensation curve mode
Heating mode
Legionella
LP mode
Packaged model
Refrigerant
Split model
TRV
UFH
The outdoor temperature
Heating to prevent water pipes freezing
Air source heat pump
Coefficient of performance the efficiency of the heat pump
Indoor unvented DHW tank and component plumbing parts
Difference in temperature between two variables
Domestic hot water heating mode for showers, sinks, etc
Speed at which water circulates around the primary circuit
Temperature at which water is delivered to the primary circuit
Flow temperature controller, the circuit board in charge of controlling the system
Space heating incorporating outdoor temperature compensation
Space heating through radiators or UFH
Bacteria potentially found in plumbing, showers and water tanks that may cause Legionnaires disease
Legionella prevention mode – a function on systems with tanks to prevent the growth of legionella bacterium
Plate heat exchanger in the outdoor heat pump unit
A compound used within the a heat cycle that goes through a phase change from gas to liquid
Plate heat exchanger in the indoor unit
Thermostatic radiator valve – a valve on the entrance or exit of the radiator panel controlling the heat output
Under floor heating – a system of water carrying pipes under the floor, that warms the floor surface
2
1 Safety Notices
Please read the following safety precautions carefully.
WARNING:
Precautions that must be observed to prevent injuries or death.
CAUTION:
Precautions that must be observed to prevent damage to unit.
This installation manual along with the user manual should be left with the product after installation for future reference.
Mitsubishi Electric is not responsible for the failure of locally supplied parts.
WARNING
Mechanical
The cylinder and outdoor units must not be installed, disassembled, relocated, altered or repaired by the user. Ask an installer or an authorised technician. If the unit is
installed improperly or modified after installation by the user water leakage, electric shock or fire may result.
The outdoor unit should be securely fixed to a hard level surface capable of bearing its weight.
The cylinder unit should be positioned on a hard level surface capable of supporting its filled weight to prevent excessive sound or vibration.
Do not position furniture or electrical appliances below the outdoor unit or cylinder.
The discharge pipework from the emergency devices of the cylinder should be installed according to local law.
Only use accessories and replacement parts authorised by Mitsubishi Electric ask a qualified technician to fit the parts.
Electrical
All electrical work should be performed by a qualified technician according to local regulations and the instructions given in this manual.
The units must be powered by a dedicated power supply and the correct voltage and circuit breakers must be used.
Wiring should be in accordance with national wiring regulations. Connections must be made securely and without tension on the terminals.
Earth unit correctly.
General
Keep children and pets away from both the cylinder and outdoor units.
Do not use the hot water produced by the heat pump directly for drinking or cooking. This could cause illness to the user and corrosion damage to the heating system.
Do not stand on the units.
Do not touch switches with wet hands.
Annual maintenance checks on both the cylinder and the outdoor unit should be done by qualified person.
Do not place containers with liquids in on top of the cylinder unit. If they leak or spill onto the cylinder unit damage to the unit and or fire could occur.
Do not place any heavy items on top of the cylinder unit.
CAUTION
Use clean water that meets local quality standards on the primary circuit.
The outdoor unit should be installed in an area with sufficient airflow according to the diagrams in the outdoor unit installation manual.
The cylinder unit should be located inside to minimise heat loss.
Water pipe-runs on the primary circuit between outdoor and indoor unit should be kept to a minimum to reduce heat loss.
Ensure condensate from outdoor unit is piped away from the base to avoid puddles of water.
Remove as much air as possible from the primary and DHW circuits.
Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378-1.
Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.
Never put batteries in your mouth for any reason to avoid accidental ingestion.
Battery ingestion may cause choking and/or poisoning.
Install the unit on a rigid structure to prevent excessive sound or vibration during operation.
Do not transport the cylinder unit with water inside the tank or coil. This could cause damage to the unit.
If power to the cylinder unit is to be turned off (or system switched off) for a long time, the water should be drained.
Preventative measures should be taken against water hammer, such as installing a Water Hammer Arrestor on the primary water circuit, as directed by the manufacturer.
WARNING (SPLIT MODELS ONLY)
Do not discharge refrigerant into the atmosphere if refrigerant leaks during installation, ventilate the room.
Use appropriate tools for high pressure refrigerant.
When pumping down refrigerant , stop the compressor before disconnecting the refrigerant pipes.
During installation securely fasten the refrigerant pipes before starting the compressor.
Check that refrigerant gas does not leak after the completion of installation.
3
2 Introduction
The purpose of this installation manual is to instruct competent persons how to
safely and efficiently install and commission the cylinder system. The target readers of this manual are competent plumbers and/or refrigeration engineers who
have attended and passed the requisite Mitsubishi Electric product training and
have appropriate qualifications for installation of an unvented hot water cylinder
specific to their country.
Overview of the System
The Mitsubishi Electric Air to Water (ATW) for heat pump system with cylinder unit
consists of the following components; outdoor heat pump unit and indoor cylinder
unit incorporating the main controller.
How the Heat Pump Works
Space heating and DHW
Heat pumps take electric energy and low grade heat energy from the outdoor air
to heat refrigerant which in turn heats water for domestic use and space heating.
The efficiency of a heat pump is known as the Coefficient of Performance or COP
this is the ratio of heat delivered to power consumed.
The operation of a heat pump is similar to a refrigerator in reverse. This process
is known as the vapour-compression cycle and the following is a more detailed
explanation.
1. Compressor
The first phase begins with the refrigerant being cold and low pressure.
1. The refrigerant within the circuit is compressed as it passes through the compressor. It becomes a hot highly pressurised gas. The temperature also rises
typically to 60°C.
2 kW
1 kW
3. Expansion valve
4. Evaporator
(Outdoor unit air heat exchanger)
Low temperature renewable heat
energy taken from the environment
Electrical energy
input
2. Condenser
(Indoor unit plate heat exchanger)
Heat energy output
3 kW
2. The hot refrigerant gas is then condensed as it passes across one side of a
plate heat exchanger. Heat from the refrigerant gas is transferred to the cooler
side (water side) of the heat exchanger. As the temperature of the refrigerant
decreases its state changes from a gas to a liquid.
3. Now as a cold liquid it still has a high pressure. To reduce the pressure the liquid passes through an expansion valve. The pressure drops but the refrigerant
remains a cold liquid.
4. The final stage of the cycle is when the refrigerant passes into the evaporator
and evaporates. It is at this point when some of the free heat energy in the outside air is absorbed by the refrigerant.
It is only the refrigerant that passes through this cycle; the water is heated as it
travels through the plate heat exchanger. The heat energy from the refrigerant
passes through the plate heat exchanger to the cooler water which increases in
temperature. This heated water enters the primary circuit and is circulated and
used to serve the space heating system and DHW cylinder.
4
2 Introduction
Overview of the Controls
Built into the front of the indoor unit is the Flow Temperature Controller3 (FTC3).
This device controls the function of both the outdoor heat pump unit and the
indoor unit. The advanced technology means that by using an FTC3 controlled
heat pump you can not only make savings compared to traditional fossil fuel type
heating systems but also compared to many other heat pumps on the market.
As explained in the earlier section, ‘How the Heat Pump Works,’ heat pumps are
most efficient when providing low flow temperature water. The FTC3’s sophisticated technology enables the room temperature to be kept at the desired level
whilst utilising the lowest possible flow temperature from the heat pump.
The controller uses temperature sensors around the heating (cooling) system to
monitor the air and flow temperatures. This data is regularly updated and compared to previous data by the controller to predict changes in room temperature
and adjust the heat pump output accordingly. By monitoring not only the outdoor
ambient, but the room and water circuit temperatures, the heating (cooling) is
more consistent and sudden spikes in required heating (cooling) are reduced.
This results in a lower overall flow temperature being required.
FTC3
Room temp sensor
20°C
Ambient
temp
sensor
Flow temp sensor
Return temp sensor
<How it works>
Temperature data is regularly received by the FTC3 from temperature sensors
around the heating (cooling) system. The most recent data is used with the previous temperature readings to predict the flow temperature required to keep the
room temperature constant.
The room temperature sensor can either be wired or the Mitsubishi wireless remote controller can be used as it incorporates a temperature sensor. For more
information on room temperature sensor options see section ‘Remote Controller
Options’. (Page 22)
5
6
DHW tank
Booster heater
Water circuit
Optional extras
• Wireless Remote Controller
• Wireless Receiver
• Immersion heater (1 Ph 3kW)
• EHPT Accessories for UK
Solar (ancillary) connection
Electrical data
Standing heat loss (W/L)
Tank performance
Operating ambient condition
Connections
Primary circuit circulating Pump
Safety device
Unvented expansion vessel
(Primary heating)
—
345 kg
130 kg
116 kg
329 kg
9.52 mm
15.88 mm
9.52 mm
15.88 mm
9.52 mm
15.88 mm
9.52 mm
—
0 - 35°C ( 80 %)
15.88 mm
PAR-WT40R-E
PAR-WR41R-E
PAC-IH03V-E
PAC-WK01UK-E
Immersion heater
Booster heater
—
114 kg
—
327 kg
114 kg
—
327 kg
114 kg
—
5-25°C
327 kg
—
—
13 A
16 A
Current
Breaker
32 A
26 A
<Table 3.1>
PAC-SE41TS-E
PAC-SH50RJ-E
PAC-SH30RJ-E
3 kW
Capacity
• Remote sensor
• Joint pipe (15.88 → 12.7)
• Joint pipe (9.52 → 6.35)
16 A
13 A
~/N, 230 V, 50 Hz
32 A
Breaker
Power supply
(Phase, voltage, frequency)
26 A
Current
—
—
—
—
16 A
13 A
32 A
26 A
16 A
9A
2 kW
16 A
13 A
3 kW
~/N, 230 V, 50 Hz
32 A
26 A
16 A
13 A
32 A
26 A
—
—
—
—
16 A
13 A
32 A
26 A
2 kW+4 kW 3 kW+6 kW 2 kW+4 kW 3 kW+6 kW 2 kW+4 kW
2 kW+4 kW 3 kW+6 kW 2 kW+4 kW 3 kW+6 kW 2 kW+4 kW
—
Capacity
—
~/N, 230 V, 3~, 400 V, ~/N, 230 V, 3~, 400 V, ~/N, 230 V, ~/N, 230 V, ~/N, 230 V, 3~, 400 V, ~/N, 230 V, 3~, 400 V, ~/N, 230 V,
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
10A
Breaker (*when powered
from independent source)
—
Power supply
(Phase, voltage, frequency)
~/N, 230 V, 50 Hz
Power supply
(Phase, voltage, frequency)
0.69
23 min
Gas
20.5 min
9.52 mm
15.88 mm
Liquid
Time to reheat 70% of DHW tank to 65°C
Control board
—
116 kg
329 kg
28 mm compression primary circuit/ 22 mm compression DHW circuit/22 mm compression solar thermal (Ancillary heating) circuit
Time to raise DHW tank temp 15 - 65°C
Refrigerant
(R410A)
116 kg
329 kg
Grundfos UPSO 25-70 180
90°C/
0.7 MPa
(7 bar)
Water
40 - 70°C
Temp & pressure relief valve (UK model only)
90°C
122°C
Thermal Cut Off (for dry run prevention)
Control thermistor
80°C
Manual reset thermostat
Min flow 5.5 l/min
Control thermistor
Flow switch
—
Cooling
0.3 MPa (3 bar)
25 - 60°C
Heating
Pressure relief valve
Control thermistor
12 L
—
345 kg
130 kg
1 bar
—
345 kg
130 kg
Charge pressure
—
347 kg
132 kg
Nominal volume
—
347 kg
Plate heat exchanger
132 kg
Weight (full)
1600 x 595 x 680 mm (Height x Width x Depth)
200L
EHST20C- EHST20C- EHST20C- EHST20C- EHST20C- EHPT20X- EHPT20X- EHPT20X- EHPT20X- EHPT20X- ERPT20XVM6HA
YM9HA
VM6A
YM9A
VM6SA
VM2HA
VM6HA
YM9HA
VM6A
YM9A
VM6SA
Weight (empty)
Overall unit dimensions
Nominal domestic hot water volume
Model name
3 Technical Information
Product specification
3 Technical Information
Component Parts
<EHPT20X- *M*H*/*M**> (Packaged model system)
A
Number
F
1
B
2
E
3
G
4
H
5
6
8
17
Automatic air vent
2
Pressure relief valve and manometer
3
Expansion vessel
4
Main controller
5
Control and electrical box
6
Temperature and pressure relief valve (not visible)
(Only for EHPT20X-VM2HA)
7
Immersion heater (Only for EHPT20X-*M*H*)
8
DHW tank
9
3-way valve
10
Water circulation pump
11
Manual air vent
Booster heater
13
Drain cock (Booster heater)
10
14
Strainer
12
15
Flow switch
16
Drain cock (Primary circuit)
17
Drain cock (DHW tank)
7
13
15
14
1
12
9
11
Component
16
A
DHW outlet connection
B
Cold water inlet connection
E
Space heating return connection
F
Space heating flow connection
G
Flow from heat pump connection
H
Return to heat pump connection
<Table 3.2>
<Figure 3.1>
<EHST20C-*M***> (Split model system)
Number
A
F
Automatic air vent
2
Pressure relief valve and manometer
3
Expansion vessel
2
4
Main controller
5
Control and electrical box
3
7
Immersion heater (Only for EHST20X-*M*H*)
8
DHW tank
1
B
E
J
4
K
5
Manual air vent
Booster heater
13
Drain cock (Booster heater)
14
Strainer
15
Flow switch
16
Drain cock (Primary circuit)
17
Drain cock (DHW tank)
7
18
Plate heat exchanger
12
A
DHW outlet connection
B
Cold water inlet connection
E
Space heating return connection
10
13
15
14
18
3-way valve
Water circulation pump
11
9
17
9
10
12
8
11
Component
1
16
F
Space heating flow connection
J
Refrigerant (Gas)
K
Refrigerant (Liquid)
<Table 3.3>
<Figure 3.2>
7
3 Technical Information
Number
<ERPT20X-VM6SA> (Solar packaged model system)
A
Automatic air vent
2
Pressure relief valve and manometer
3
Expansion vessel
4
Main controller
2
5
Control and electrical box
8
DHW tank
3
9
3-way valve
10
Water circulation pump
F
B
1
C
D
E
G
H
Component
1
4
11
Manual air vent
12
Booster heater
13
Drain cock (Booster heater)
14
Strainer
8
15
Flow switch
9
16
Drain cock (Primary circuit)
17
Drain cock (DHW tank)
A
DHW outlet connection
5
11
10
B
Cold water inlet connection
C
Solar (ancillary heat source) connection
12
D
Solar (ancillary heat source) connection
13
15
E
Space heating return connection
F
Space heating flow connection
G
Flow from heat pump connection
H
Return from heat pump connection
17
14
16
<Table 3.4>
<Figure 3.3>
Number
<EHST20C-VM6SA> (Solar split model system)
A
B
F
1
C
2
D
E
3
J
4
Component
1
Automatic air vent
2
Pressure relief valve and manometer
3
Expansion vessel
4
Main controller
5
Control and electrical box
8
DHW tank
9
3-way valve
10
Water circulation pump
11
Manual air vent
12
Booster heater
13
Drain cock (Booster heater)
14
Strainer
8
15
Flow switch
9
16
Drain cock (Primary circuit)
17
Drain cock (DHW tank)
18
Plate heat exchanger
A
DHW outlet connection
K
5
11
10
17
14
B
Cold water inlet connection
12
C
Solar (ancillary heat source) connection
13
15
D
Solar (ancillary heat source) connection
E
Space heating return connection
16
18
F
Space heating flow connection
J
Refrigerant (Gas)
K
Refrigerant (Liquid)
<Table 3.5>
<Figure 3.4>
8
3 Technical Information
Technical Drawings
Pressure relief valve
Rc1/2
Air vent
595
445.4
100
91.5
680
Main controller
1600
1
183
Terminal block
Front panel
<Left side>
<Front>
<Right side>
C
47.1
0
550.2
541.1
522.8
470.8
454.5
Letter
0
63.3
67.8
123
A
D
E
G/J
B
F
449.7
491.1
509.7
561.7
Η/Κ
L
<Top>
Pipe description
Connection size/type
A
DHW outlet connection
22 mm/Compression
B
Cold water inlet connection
22 mm/Compression
C/D
Solar (ancillary heat source) connection
22 mm/Compression
E
Space heating return connection
28 mm/Compression
F
Space heating flow connection
28 mm/Compression
G
Flow from heat pump connection
(No plate heat exchanger)
28 mm/Compression
H
Return to heat pump connection
(No plate heat exchanger)
28 mm/Compression
J
Refrigerant (GAS)
(With plate heat exchanger)
15.88 mm/Flare
K
Refrigerant (LIQUID)
(With plate heat exchanger)
9.52 mm/Flare
L
Electrical cable inlets
—
* The leftmost hole is for
wireless receiver (option)
(PAR-WR41R-E)
<Table 3.6>
9
3 Technical Information
Unit Compatibility
Cylinder unit EHST20C- EHST20C- EHST20C- EHST20C- EHST20C- EHPT20X- EHPT20X- EHPT20X- EHPT20X- EHPT20X- ERPT20XVM6HA
YM9HA
VM6A
YM9A
VM6SA
VM2HA
VM6HA
YM9HA
VM6A
YM9A
VM6SA
Outdoor unit
Packaged - type
Split - type
PUHZ-W50-85
PUHZ-HW112-140
PUHZ-RP35-140
PUHZ-HRP71-125
<Table 3.7>
Packaged model system
1.
2.
3.
Cold
water
DHW
14
12
15
8
9
7
Drain
6
1
2
3
10
10
4
13
11
12.
13.
14.
15.
13
Outdoor unit
11
10
10
5
Cylinder unit
Note
• To enable draining of the cylinder unit an
isolating valve should be positioned on both
the inlet and outlet pipework.
• Be sure to install a strainer, on the inlet pipe
work to the cylinder unit.
• Suitable drain pipe work should be attached
to all relief valves in accordance with your
country’s regulations.
• A backflow prevention device must be installed on the cold water supply pipework
(IEC 61770)
• When using components made from different metals or connecting pipes made of different metals insulate the joints to prevent
a corrosive reaction taking place which will
damage the pipework.
10
10
12
Water Drain
supply
<Figure 3.5>
Split model system
Cold
water
DHW
14
12
9
15
8
7
Drain
6
1
10
11
2
3
13
4
Outdoor unit
10
5
Cylinder unit
Flare connection
10
10
12
<Figure 3.6>
10
4.
5.
6.
7.
8.
9.
10.
11.
Outdoor unit
Plate heat exchanger
Interconnecting pipe work
Packaged model system—Water
Split model system—Refrigerant
Booster heater
Water circulation pump
3-way valve
DHW Tank
Cold water inlet
DHW outlet connection
Isolating valve
Heat emitters
(E.g. Radiator, Floor heating, Fan coil)
Back flow prevention device (field supply)
Strainer
Pressure relief valve
Drain pipe (field supply)
Water Drain
supply
11
4 Installation
4.1 Location
Service access diagrams
Transportation and Handling
Service access
Fr
on
t
Front
Parameter
a
b
c (distance behind unit not visible
in Figure 4.1.2)
d
Dimension (mm)
300
150
10
500
<Table 4.1.1>
Sufficient space MUST be left for the provision of discharge pipework as detailed
in National and Local building regulations.
a
b
Handle
b
Leg
<Figure 4.1.1>
Cylinder unit is delivered on a wooden pallet base with cardboard protection.
Care should be taken when transporting the cylinder unit that the casing is not
damaged by impact. Do not remove the protective packaging until cylinder has
reached its final location. This will help protect the structure and control panel.
d
<Figure 4.1.2>
Service access
• The cylinder unit can be transported either vertically or horizontally. If transported
horizontally the panel marked ‘Front’ must be facing UPWARDS <Figure 4.1.1>.
• The cylinder unit should ALWAYS be moved by a minimum of 2 people.
• When carrying the cylinder use the handles provided.
• Before using the handles, make sure they are securely attached.
• Please remove handles, fixing legs, wooden base and any other packaging once the unit is in installation location.
Suitable Location
Before installation the cylinder unit should be stored in a frost-free weatherproof location. Units must NOT be stacked.
• The cylinder unit should be installed indoors in a frost free weather proof location.
• The cylinder unit should be positioned on a level surface capable of supporting
it’s filled weight. (Adjustable feet (accessory parts) can be used to ensure unit is
level)
• When using the adjustable feet, ensure that the floor is strong enough.
• Care should be taken that minimum distances around the unit for service access are observed <Figure 4.1.2>.
• Secure the cylinder unit to prevent it being knocked over accidentally or during
earthquakes.
The cylinder unit must be located indoors, for example in a utility room, to
minimise heat loss from stored water.
Room Thermostat
If fitting a new room thermostat for this system;
•
•
•
•
•
Position out of direct sunlight and draughts
Position away from internal heat sources
Position in a room without a TRV on the radiator
Position on an internal wall
Position approx. 1.5 m from floor level
Repositioning
If you need to move the cylinder unit to a new position FULLY DRAIN the cylinder
and the internal coil before moving to avoid damage to the unit.
4.2 Water Quality and System Preparation
General
• Water quality should be to European Directive 98/83 EC standards.
► pH value of 6.5-8.0
► Calcium ≤ 100 mg/l
► Chlorine ≤ 100 mg/l
► Iron/Manganese ≤ 0.5 mg/l
New Installation
• Before connecting outdoor unit, thoroughly cleanse pipe work of building debris,
solder etc using a suitable chemical cleansing agent.
• Flush the system to remove chemical cleanser.
• For all packaged systems add a combined inhibitor and anti-freeze solution to
prevent damage to the pipe work and system components.
• For split systems the responsible installer should decide if anti-freeze solution is
necessary for each site’s conditions. Corrosion inhibitor however should always
be used.
Existing Installation
• Before connecting outdoor unit the existing heating circuit MUST be chemically
cleansed to remove existing debris from the heating circuit.
• Flush the system to remove chemical cleanser.
• For all packaged systems add a combined inhibitor and anti-freeze solution to
prevent damage to the pipe work and system components.
• For split systems the responsible installer should decide if anti-freeze solution is
necessary for each site’s conditions. Corrosion inhibitor however should always
be used.
When using chemical cleansers and inhibitors always follow manufacturer’s
instructions and ensure the product is appropriate for the materials used in
the water circuit
11
4 Installation
How to access Internal Components and Control Box
<A>
<B>
<C>
<A> Opening the front panel
1. Remove the two lower screws.
2. Slide front panel upwards to remove.
<B> Opening the control box cover
1. Remove the four screws.
2. Remove the control box cover.
Screws
Hinges
Screws
Open
<C> Accessing the back of the control box
The control box is hinged on the left hand side and has two holding screws on the right.
1. Remove the two holding screws on the control box.
2. The control box can then be swung forward on the left hand hinges.
Front
panel
Screws
4.3 Water Pipe work
Hot Water Pipe work
Cold Water Pipe work
The cylinder unit is UNVENTED. When installing unvented hot water systems building regulations part G3 (England and Wales), P3 (Scotland) and P5
(Northern Ireland) should be adhered to. If outside of the UK please adhere
to your own country’s regulations for unvented hot water systems.
Cold water of a suitable standard (see section 4.2) should be introduced to the
system by connecting pipe B (Fig 3.1) using appropriate fittings.
Connect the flow for the DHW to pipe A (Component diagrams).
The function of the following safety components of the cylinder should be
checked on installation for any abnormalities;
• Pressure relief valve
• Temperature and pressure relief valve (EHPT20X-VM2HA ONLY)
• Expansion vessel pre-charge
Connections to the cylinder unit should be made using the 22 mm or 28 mm compression as appropriate.
Do not over-tighten compression fittings as this will lead to deformation of the olive ring and potential leaks.
The instruction on the following pages regarding safe discharge of hot water from
Safety devices should be followed carefully.
• The pipe work will become very hot, so should be insulated to prevent burns.
• When connecting pipe work, ensure that no foreign objects such as debris or
the like do not enter the pipe
• All exposed water pipe work should be insulated to prevent unnecessary heat
loss and condensation. To prevent condensate entering the cylinder unit, the pipe
work and connections at the top of the cylinder unit should be carefully insulated.
• Cold and hot water pipe work should not be run close together where possible,
to avoid unwanted heat transfer.
• Pipe work between outdoor heat pump unit and cylinder should be insulated
with suitable pipe insulation material with a thermal conductivity of 0.04 W/m.K.
Pipe work Connections
Insulation of Pipe work
Filling the System (Primary Circuit)
Filling
1. Check all connections including factory fitted ones are tight.
2. Insulate pipe work between cylinder and outdoor unit.
3. Thoroughly clean and flush, system of all debris. (see section 4.2 for detailed
instructions.)
4. Fill cylinder with potable water. Fill primary heating circuit with water and suitable anti-freeze and inhibitor as necessary. Always use a filling loop with
double check valve when filling the primary circuit to avoid back flow
contamination of water supply.
• Anti-freeze should always be used for package systems. It is the responsibility of the installer to decide if anti-freeze solution should be used in split
systems depending on each site’s conditions. Anti – freeze solution should
always be used in package systems. Corrosion inhibitor should be used in
both split and package systems.
• When connecting metal pipes of different materials insulate the joints to
prevent a corrosive reaction taking place which will damage the pipework.
5.
6.
7.
8.
Check for leaks. If leaks are found, retighten the screws on the connections.
Pressurise system to 1 bar.
Release all trapped air using air vents during and following heating period.
Top up with water as necessary. (If pressure is below 1 bar)
Sizing Expansion Vessels
To size the expansion vessel for the heating circuit the following formula and
graph can be used.
Expansion vessel sizing
ε×G
P + 0.098
1 + P¹ + 0.098
²
Where;
V : Necessary expansion vessel volume
ε : Water expansion coefficient
G : Total volume of water in the system
P¹ : Expansion vessel setting pressure
P² : Max pressure during operation
Graph below is for the following values
ε : at 65 °C = 0.0198
P¹ : 0.1 MPa
P² : 0.3 MPa
*A 30% safety margin has been added.
12
Expansion vessel volume [L]
25
V=
20
15
10
5
0
0
50
100
150
200
250
System water volume [L]
<Figure 4.3.1>
300
350
400
4 Installation
<Second pump >
If a second pump is required for the installation please read the following carefully.
If a second pump is used in the system it can be positioned in 2 ways.
The position of the pump influences which terminal of the FTC3 the signal cable
should be wired to. If the additional pump(s) have current greater than 1A please
use appropriate relay. Pump signal cable can either be wired to TBO.1 1-2 or
CNP1 but not both.
Option 1 (Space heating only)
If the second pump is being used for the heating circuit only then the signal cable
should be wired to TBO.1 terminals 3 and 4 (OUT2). In this position the pump can
be run at a different speed to the cylinder unit’s in-built pump.
Option 2 (Primary circuit DHW and space heating)
If the second pump is being used in the primary circuit between the cylinder unit
and the outdoor unit (Package system ONLY) then the signal cable should be
wired to TBO.1 terminals 1 and 2 (OUT1). In this position the pump speed MUST
match the speed of the cylinder unit’s in-built pump.
Outdoor heat pump unit
Packaged
PUHZ-W50
PUHZ-W85
PUHZ-WH112
PUHZ-WH140
Split
PUHZ-RP35
PUHZ-RP50
PUHZ-RP60
PUHZ-(H)RP71
PUHZ-(H)RP100
PUHZ-(H)RP125
PUHZ-RP140
Water flow rate range [L/min]
7.1 - 14.3
10.0 - 25.8
14.4 - 27.7
17.9 - 27.7
7.1 - 11.8
7.1 - 17.2
8.6 - 20.1
10.2 - 22.9
14.4 - 27.7
17.9 - 27.7
20.1 - 27.7
<Table 4.3.1>
* If the water flow rate is less than 7.1 L/min, the flow switch will be activated.
If the water flow rate exceeds 27.7 L/min, the flow speed will be greater than 1.5 m/s,
which could corrode the pipes.
Water circulation pump characteristics
External static pressure
[kPa]
Water Circulation Pump Characteristics
Pump speed can be selected on the pump (see <Figure 4.3.2>).
Adjust the pump speed setting so that the flow rate in the primary circuit is appropriate for the outdoor unit installed see Table 4.3.1. It may be necessary to add
an additional pump to the system depending on the length and lift of the primary
circuit.
80
70
60
50
40
30
20
10
0
Speed3
Speed1
0
Speed2
15
20
10
Flow rate [L/min]
5
25
30
<Figure 4.3.2>
EHPT20X-VM2HA (for UK)
Safety Device Connections
The pressure relief valve, situated at the top of the cylinder unit, and the temperature and pressure relief valve*, situated part way down the tank on the right hand
side, both need appropriate discharge pipe work. In accordance with building
regulations a tundish must be fitted into the pipework within 500 mm of the safety
device. Due to the distance between the two safety devices it is necessary to fit
each safety device with its own tundish before you run the pipework together to a
safe discharge (see Figure 4.3.3). The right side panel has a window so that connection can be made to the temperature and pressure relief valve. If you wish to
make the connection in a different position you will have to cut a hole in the side
panel yourself. However it remains necessary that the drainage parameters outlined in the appropriate building regulations are complied with.
DHW
Pressure relief valve
(Water circuit)
Tundish
Temperature and
pressure relief valve
(Tank)
Tundish
*Temperature and pressure relief valve fitted on EHPT20X-VM2HA ONLY.
Diagram Description
part No.
2
6
Connection Connection
size
type
Pressure relief valve
Rc 1/2
Temperature and pressure relief 15 mm
valve
Female
Compression
Other models
Pressure relief valve
(Tank) *field supply
<Table 4.3.2>
DHW
Always refer to local regulations when installing discharge pipework.
Install discharge pipe work in a frost-free environment.
It is necessary to provide appropriate drainage from the pressure relief valve
situated on top of the cylinder to prevent damage to the unit and the surrounding area from any steam or hot water released. Relief valves MUST
NOT be used for any other purpose.
<Figure 4.3.3>
For UK use WK01UK-E kit, for other countries please see below;
• A field supplied pressure relief valve must be installed in accordance with local
and national regulations. Maximum opening pressure must be ≤10 bar.
• Any discharge pipework should be capable of withstanding discharge of hot
water. Discharge pipework should be installed in a continuously downward direction. Discharge pipework must be left open to the environment.
13
4 Installation
4.4 Safety Device Discharge Arrangements (G3)
i. Ideally below a fixed grating and above the water seal in a trapped gully.
The following instructions are a requirement of British building regulations
and must be adhered to. For other countries please refer to local legislation.
If you are in any doubt please seek advice from local building planning office.
ii. Downward discharges at low level; i.e. up to 100 mm above external surfaces
such as car parks, hard standings, grassed areas etc. are acceptable providing
that where children may play or otherwise come into contact with discharges a
wire cage or similar guard is positioned to prevent contact, whilst maintaining
visibility.
iii. Discharges at high level; e.g. into a metal hopper and metal down pipe with
the end of the discharge pipe clearly visible (tundish visible or not) or onto a
roof capable of withstanding high temperature discharges of water and 3 m
from any plastics guttering system that would collect such discharges (tundish
visible).
1. Position the inlet control group so that discharge from both safety valves can
be joined together via a 15 mm end feed Tee.
2. Connect the tundish and route the discharge pipe as shown in Figure 4.4.1.
3. The tundish should be fitted vertically and as close to the safety device as possible and within 500 mm of the device.
4. The tundish should be visible to occupants and positioned away from electrical
devices.
5. The discharge pipe (D2) from the tundish should terminate in a safe place
where there is no risk to persons in the vicinity of the discharge, be of metal
construction and:
A) Be at least one pipe size larger than the nominal outlet size of the safety device unless its total equivalent hydraulic resistance exceeds that of a straight
pipe 9 m long i.e. discharge pipes between 9 m and 18 m equivalent resistance length should be at least two sizes larger than the nominal outlet size
of the safety device, between 18 and 27 m at least 3 sizes larger, and so on.
Bends must be taken into account in calculating the flow resistance. Refer to
Figure 4.4.1, Table 4.4.1 and the worked example. An alternative approach
for sizing discharge pipes would be to follow BS 6700: 1987 specification for
design installation, testing and maintenance of services supplying water for
domestic use within buildings and their cartilages.
B) Have a vertical section of pipe at least 300 mm long, below the tundish before
any elbows or bends in the pipe work.
C) Be installed with a continuous fall.
D) Have discharges visible at both the tundish and the final point of discharge but
where this is not possible or is practically difficult there should be clear visibility
at one or other of these locations. Examples of acceptable discharge arrangements are:
iv. Where a single pipe serves a number of discharges, such as in blocks of flats,
the number served should be limited to not more than 6 systems so that any
installation discharging can be traced reasonably easily. The single common
discharge pipe should be at least one pipe size larger than the largest individual discharge pipe (D2) to be connected. If unvented hot water storage systems
are installed where discharges from safety devices may not be apparent i.e.
in dwellings occupied by blind, infirm or disabled people, consideration should
be given to the installation of an electronically operated device to warn when
discharge takes place.
Note: The discharge will consist of scalding water and steam. Asphalt,
roofing felt and nonmetallic rainwater goods may be damaged by
such discharges.
Worked example: The example below is for a G½ temperature relief valve with
a discharge pipe (D2) having 4 No. elbows and length of 7 m from the tundish to
the point of discharge.
From Table 1: Maximum resistance allowed for a straight length of 22 mm copper discharge pipe (D2) from a G½ temperature relief valve is: 9.0 m subtract the
resistance for 4 No. 22 mm elbows at 0.8 m each = 3.2 m. Therefore the maximum permitted length equates to: 5.8 m. 5.8 m is less than the actual length of
7 m, therefore calculate the next largest size. Maximum resistance allowed for a
straight length of 28 mm pipe (D2) from a G½ temperature relief valve equates to:
18 m
Subtract the resistance for 4 No. 28 mm elbows at 1.0 m each = 4 m. Therefore
the maximum permitted length equates to: 14 m. As the actual length is 7 m, a
28 mm (D2) copper pipe will be satisfactory.
Metal discharge pipe (D1)
temperature relief valve to tundish
Safety device
(e.g. temperature
relief valve)
500 mm maximum
Tundish
300 mm
minimum
Discharge below fixed grating
(Point 5.D gives alternative points
of discharge)
Metal discharge pipe (D2) from tundish,
with continuous fall. See Point 5.D i-iv,
Table 1 and worked example
Fixed grating
Trapped gulley
<Figure 4.4.1>
Valve outlet
size
G 1/2
Minimum size of
discharge pipe D1
15 mm
G 3/4
22 mm
G1
28 mm
Minimum size of
discharge pipe D2 from tundish
22 mm
28 mm
35 mm
28 mm
35 mm
42 mm
35 mm
42 mm
54 mm
Maximum resistance allowed, expressed as a
length of straight pipe (no elbows or bends)
Up to 9 m
Up to 18 m
Up to 27 m
Up to 9 m
Up to 18 m
Up to 27 m
Up to 9 m
Up to 18 m
Up to 27 m
<Table 4.4.1>
14
Resistance created
by each elbow or bend
0.8 m
1.0 m
1.4 m
1.0 m
1.4 m
1.7 m
1.4 m
1.7 m
2.3 m
4 Installation
4.5 Refrigerant Pipe work
(Split Model Systems only)
0.5
A
ø9.52
For devices that use R410A refrigerant
• Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigeration
oil applied to the flared sections.
• Use C1220 copper phosphorus for copper and copper alloy seamless pipes, to
connect the refrigerant pipes. Use refrigerant pipes with the thicknesses specified in the table below. Make sure the insides of the pipes are clean and do
not contain any harmful contaminants such as sulfuric compounds, oxidants,
debris, or dust.
Warning:
When installing or moving the air conditioner, use only the specified refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other
refrigerant and do not allow air to remain in the lines. Air enclosed in the
lines can cause pressure peaks resulting in a rupture and other hazards.
RP35, 50
ø6.35 thickness 0.8 mm
ø12.7 thickness 0.8 mm
Flare cutting dimensions
Flare nut tightening torque
Precautions
Liquid pipe
Gas pipe
45 2
.8
R0
.4~
R0
Gas side pipe size (mm) Liquid side Pipe size (mm)
ø15.88
90
Installation of refrigerant pipe work MUST only be done by a technician with relevant qualifications. Installation requirements may differ depending on the outdoor
unit selected. Please also refer to outdoor unit installation manual when connecting refrigerant pipe work.
<Figure 4.5.1>
Flare cutting dimensions
Copper pipe O.D.
(mm)
ø 6.35
ø9.52
ø12.7
ø15.88
Flare dimensions
øA dimensions (mm)
8.7 - 9.1
12.8 - 13.2
16.2 - 16.6
19.3 - 19.7
B
RP60-140/HRP71-125
ø9.52 thickness 0.8 mm
ø15.88 thickness 1.0 mm
• Do not use pipes thinner than those specified above.
Connecting pipes (Figure 4.5.1)
• When commercially available copper pipes are used, wrap liquid and gas
pipes with commercially available insulation materials (heat-resistant to 100 °C
or more, thickness of 12 mm or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening flare nut.
• Use two wrenches to tighten piping connections.
• Use refrigerant piping insulation to insulate indoor unit connections.
Flare nut tightening torque
Copper pipe O.D.
(mm)
ø6.35
ø6.35
ø9.52
ø12.7
ø12.7
ø15.88
ø15.88
Flare nut O.D.
(mm)
17
22
22
26
29
29
36
Tightening torque
(N·m)
14 - 18
34 - 42
34 - 42
49 - 61
68 - 82
68 - 82
100 - 120
Apply refrigerating machine oil over the entire flare seat surface.
Use correct flare nuts matching the pipe size of the outdoor unit.
Die
Copper pipe
<Figure 4.5.2>
Copper pipe O.D.
(mm)
ø6.35 (1/4")
ø9.52 (3/8")
ø12.7 (1/2")
ø15.88 (5/8")
B (mm)
Flare tool for R410A
Clutch type
1.0 - 1.5
1.0 - 1.5
1.0 - 1.5
1.0 - 1.5
A
B
<Cylinder unit side>
<Extension pipe side>
<Figure 4.5.3>
Match the outer diameter of the refrigerant pipe between the outdoor unit and cylinder unit with that of the refrigerant pipe on the outdoor unit.
If they do not match, connect the following adapter to the refrigerant pipe on the
cylinder unit.
Model name
PAC-SH50RJ-E
PAC-SH30RJ-E
Connected pipes
diameter (mm)
ø15.88 → ø12.7
ø9.52 → ø6.35
Diameter A
(mm)
ø15.88 (5/8 F)
ø 9.52 (3/8 F)
Diameter B
(mm)
ø12.7 (1/2 F)
ø 6.35 (1/4 F)
15
4 Installation
4.6 Electrical Connection
The cylinder unit can be powered in two ways.
1. Power cable is run from the outdoor unit to the cylinder unit.
2. Cylinder unit has independent power source
All electrical work should be carried out by a suitably qualified technician. Failure
to comply with this could lead to electrocution, fire, and death. It will also invalidate product warranty. All wiring should be according to national wiring regulations.
Breaker abbreviation
ECB1
ECB2
TB1
Connections should be made to the terminals indicated in the following figures
depending on the phase.
Meaning
Earth leakage breaker booster heater
Earth leakage breaker immersion heater
Terminal bed 1
Booster heater and immersion heater should be connected independently from
one another to dedicated power supplies.
ECB1 ECB2
ECB1 ECB2
A
A
F
E
F
E
B
D
Locally supplied wiring should be inserted through the inlets situated on the
top of the cylinder unit.
Wiring should be fed down the right hand side of the electrical box and
clamped in place using clips provided.
The wires should then be inserted through the cable inlets on the base of the
electrical box.
Connect the outdoor unit – cylinder unit connecting cable to TB1.
Connect the power cable for the booster heater to ECB1
If immersion heater is present, connect the power cable to ECB2.
B
C
D
TB1
Make sure that ECB1 and ECB2 are ON.
C
TB1
<1 phase (with immersion heater)>
<3 phase (with immersion heater)>
Cylinder unit
Option 1: Cylinder unit powered via outdoor unit
<1 phase>
Power
supply
~/N
230V
50Hz
Outdoor unit
Wiring
circuit
breaker
or
Isolating
switch
Earth
leakage
breaker
TB1
L
S1
S1
N
S2
S2
S3
S3
ECB1
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
L
N
ECB2
L
N
To control
board
ELB for
booster
heater
(Primary circuit)
ELB for
immersion
heater
(DHW tank)
* Affix label A that is included with the manuals near each wiring diagram for cylinder unit and outdoor units.
<Figure 4.6.1>
Electrical connections 1 phase
Description
Power supply
Capacity (Indoor unit Ref.) Breaker
~/N 230 V 50 Hz
Immersion heater (DHW tank)
~/N 230 V 50 Hz
Circuit
rating
Wiring
Wiring No.
× size (mm²)
Booster heater (Primary circuit)
2 kW (E******-VM2**)
6 kW (E******-VM6**)
3 kW (E******-VM*H*)
Cylinder unit - Outdoor unit
*2
3 × 1.5 (polar)
Cylinder unit - Outdoor unit earth
*2
1 × Min. 1.5
Cylinder unit - Outdoor unit S1 - S2
*3
AC230V
Cylinder unit - Outdoor unit S2 - S3
*3
DC24V
16 A *1
32 A *1
16 A *1
Wiring
2.5 mm²
6.0 mm²
2.5 mm²
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
16
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4 Installation
<3 phase>
Cylinder unit
Outdoor unit
Power
supply
3N~
400V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Earth
leakage
breaker
TB1
L1
S1
S1
L2
S2
S2
L3
S3
S3
To control
board
N
ECB1
Power
Supply
3~
400V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Power
Supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
L1
L2
L3
ECB2
L
N
ELB for
booster
heater
(Primary circuit)
ELB for
immersion
heater
(DHW tank)
* Affix label A that is included with the manuals near each wiring diagram for cylinder unit and outdoor units.
<Figure 4.6.2>
Electrical connections 3 phase
Description
Circuit
rating
Wiring
Wiring No.
× size (mm²)
Booster heater (Primary circuit)
Immersion heater (DHW tank)
Power supply
Capacity (Indoor unit Ref.) Breaker
3~ 400V 50Hz
~/N 230 V 50 Hz
9 kW
3kW (E******-VM*H*)
Cylinder unit - Outdoor unit
*2
3 × 1.5 (polar)
Cylinder unit - Outdoor unit earth
*2
1 × Min. 1.5
Cylinder unit - Outdoor unit S1 - S2
*3
AC230V
Cylinder unit - Outdoor unit S2 - S3
*3
DC24V
16 A *1
16 A *1
Wiring
2.5 mm²
2.5 mm²
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
17
4 Installation
N
CNO1
S1
YELLOW
• Cylinder unit electrical box connector connections changed (see Figure
4.6.3)
• Outdoor unit DIP switch settings changed to SW8-3 ON
YELLOW
Initial settings
(Power supplied
by outdoor unit)
BLACK
L
If the cylinder and outdoor units have separate power supplies, the following requirements MUST be carried out:
BLACK
Option2: Cylinder unit powered by independent source.
Black
CNO1
Cylinder unit
control board
S2
S3
If the cylinder power supply terminal kit is used some of the wiring in the electrical
box will need to be altered as shown in Figure 4.6.4.
N
S2
CNO1
BLACK
YELLOW
S1
BLACK
Modified settings
(Separate power
supply to
the cylinder unit)
YELLOW
L
Black
CNO1
Cylinder unit
control board
S3
<Figure 4.6.3>
<1 phase>
Cylinder unit
TB1
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Earth
leakage
breaker
L
N
Outdoor unit
Power
supply
~/N
230V
50Hz
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
L
S1
S1
N
S2
S2
S3
S3
ECB1
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
L
N
ECB2
L
N
To control
board
ELB for
booster
heater
(Primary circuit)
ELB for
immersion
heater
(DHW tank)
* Affix label B that is included with the manuals near each wiring diagram for cylinder unit and outdoor units.
<Figure 4.6.4>
Electrical connections 1 phase
Description
Power supply
Capacity (Indoor unit Ref.) Breaker
Booster heater (Primary circuit)
~/N 230 V 50 Hz
Immersion heater (DHW tank)
~/N 230 V 50 Hz
Circuit
rating
Wiring
Wiring No.
× size (mm²)
Cylinder unit power supply
Cylinder unit input capacity
Main switch (Breaker)
Cylinder unit power supply
Cylinder unit power supply earth
Cylinder unit - Outdoor unit
Cylinder unit - Outdoor unit earth
Cylinder unit L - N
Cylinder unit - Outdoor unit S1 - S2
Cylinder unit - Outdoor unit S2 - S3
2 kW (E******-VM2**)
6 kW (E******-VM6**)
3kW (E******-VM*H*)
16 A *1
32 A *1
16 A *1
Wiring
2.5 mm²
6.0 mm²
2.5 mm²
~/N 230 V 50 Hz
*1
*2
*3
*3
*3
16 A
2 × Min. 1.5
1 × Min. 1.5
2 × Min. 0.3
—
AC230V
—
DC24V
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 120 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
18
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4 Installation
<3 phase>
Cylinder unit
TB1
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Earth
leakage
breaker
L
N
Outdoor unit
Power
supply
3N~
400V
50Hz
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
L1
S1
S1
L2
S2
S2
L3
S3
S3
To control
board
N
ECB1
Power
supply
3~
400V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
~/N
230V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
L1
L2
L3
ECB2
L
N
ELB for
booster
heater
(Primary circuit)
ELB for
immersion
heater
(DHW tank)
* Affix label B that is included with the manuals near each wiring diagram for cylinder unit and outdoor units.
<Figure 4.6.5>
Electrical connections 3 phase
Description
Booster heater (Primary circuit)
Immersion heater (DHW tank)
Power supply
Wiring
Wiring No.
× size (mm²)
Cylinder unit power supply
Cylinder unit input capacity
Main switch (Breaker)
Cylinder unit power supply
Cylinder unit power supply earth
Cylinder unit - Outdoor unit
Cylinder unit - Outdoor unit earth
Cylinder unit L - N
Cylinder unit - Outdoor unit S1 - S2
Cylinder unit - Outdoor unit S2 - S3
Circuit
rating
Capacity (Indoor unit Ref.) Breaker
3~ 400V 50Hz
~/N 230 V 50 Hz
9 kW
3kW (E******-VM*H*)
16 A *1
16 A *1
Wiring
2.5 mm²
2.5 mm²
~/N 230 V 50 Hz
*1
*2
*3
*3
*3
16 A
2 × Min. 1.5
1 × Min. 1.5
2 × Min. 0.3
—
AC230V
—
DC24V
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 120 m
*3. The values given in the table above are not always measured against the ground value.
Notes:
1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
19
5 System Set Up
5.1 Dip Switch Functions
Located on the FTC3 printed circuit board are 5 sets of small white switches
known as Dip switches. The Dip switch number is printed on the circuit board
next to the relevant switches. Printed on the circuit board and on the Dip switch
block itself is the word ON. To move the switch you will need to use a pin or the
corner of a thin metal ruler or similar.
SW1
SW2 SW4
Dip switch settings are listed below in Table 5.1.1.
SW3
<Figure 5.1.1>
Dip switch
SW1
—
55 °C
Default (Indoor unit Ref.)
OFF
WITHOUT DHW tank
WITH DHW tank
SW1-4
Immersion heater
WITHOUT immersion heater
WITH immersion heater
SW1-5
Booster heater
WITHOUT booster heater
WITH booster heater
OFF:E******-*M**
ON :E******-*M*H*
ON
SW1-6
Booster heater function
For heating only
For heating and DHW
ON
SW1-7
Outdoor unit type
Split type
Packaged type
WITHOUT wireless remote controller WITH wireless remote controller
OFF:E*S****-*M**
ON :E*P****-*M**
OFF
60 °C
OFF:E*S****-*M** ( 1)
ON :E*P****-*M**
ON
SW1-8
Wireless remote controller
SW2-1
Room thermostat input (IN1) logic change Operation stop at thermostat short
Operation stop at thermostat open
OFF
SW2-2
Flow switch input (IN2) logic change
Failure detection at short
Failure detection at open
ON
SW2-3
Booster heater capacity restriction
Inactive
Active
OFF
ON: EHPT20X-VM2HA
OFF:EH*****-*M**
ON :ER*****-*M**
OFF
—
—
—
Temperature control interval
(Room temperature control heating and
cooling)
SW2-5
SW2-6
Setting
OFF
OFF
10 min
ON
OFF
20 min
OFF
ON
30 min
ON
ON
60 min
Flow temperature upper limit
(Room temperature control heating)
SW2-7
SW2-8
Setting
OFF
OFF
35°C
ON
OFF
40°C
OFF
ON
50°C
ON
ON
60°C
OFF
SW3-1
SW3-2
Flow temperature lower limit
(Room temperature control heating)
SW3-1
SW3-2
Setting
OFF
OFF
25°C
ON
OFF
30°C
OFF
ON
35°C
ON
ON
40°C
ON
SW3-3
Heating and DHW simultaneous operation Inactive
SW2-5
SW2-6
SW2-7
SW2-8
SW3-4~8
SW4
ON
—
SW1-3
SW2-4
SW3
OFF
—
Heat pump maximum outlet water
temperature
DHW tank
SW1-2
SW2
Function
SW1-1
SW4-1~4
SW4-5
SW4-6
Active
—
—
—
—
Emergency mode (Heater only operation) Normal
—
ON
OFF
OFF
—
OFF
—
OFF
Emergency mode (Heater only operation)
(To be activated only when powered
ON)
—
OFF
—
OFF ( 2)
OFF
<Table 5.1.1>
Notes:
20
1. For packaged model system max outlet water temperature is always 60°C so default Dip switch SW1-2 is ON.
For split model system the max outlet water temperature is usually 55°C except in the case of PUHZ-HRP outdoor model where max outlet water
temperature is 60°C and DIP switch SW1-2 should be changed to ON.
2. If emergency mode is no longer required, please turn off both outdoor and indoor unit power supply before returning SW4-5 to OFF position.
5 System Set Up
5.2 Connecting external input/output
CN01
5
3
1
CN3C
1
3
1
1
14
CNM
SW4
1
Connect the terminals by using the ring terminals and also insulate the cables of adjoining terminals when wiring to terminal block.
8
6
TBI.2
LED1
FTC3
CNRF 5
SW2
1
SW3
SW1
8
LED3
8
1
1
LED2
14
12
10
8
6
4
2
13
11
9
7
5
3
1
CN22
CN2F
2
1
2
1
THW3
2
1
TBI.1
TBO.1
2
1
CNP1
1
3
4
3
TBO.2
6
5
8
7
10 12 14
䋹
11 13
4
1
CNV1
1
2
5
TBO.3
3
6
5
8
7
2
10 12 14
9
CNBC
CNBHT
1 3
1 3
11 13
CNBH
1 3 5 7
1
4
3
6
5
CNIHT
1
3
8
7
10 12 14
9
11 13
CNIH
1
3
14
13
12
11
10
9
8
7
6
5
4
3
2
1
6
THW5
THW12
TH2
TH1
1
4
1
2
1
2
1
<Figure 5.2.1>
External input
Name
IN1
IN2
IN3
IN4
Terminal block
TBI.2 5-6
TBI.2 7-8
—
TBI.2 13-14
Connector
—
CN2F
—
—
Item
Room thermostat input
Flow switch input
—
Heat source OFF
OFF (Open)
Refer to SW2-1 (Page 20)
Refer to SW2-2 (Page 20)
—
Normal
ON (Short)
—
Heat source OFF
Wiring specification and field supply parts
Item
Name
Model and specifications
External input External input Use sheathed vinyl coated cord or cable.
function
signal wire
Max. 10 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to 1.25 mm²
Solid wire: ø 0.65 mm to ø1.2 mm
Switch
Non-voltage “a” contact signals
Remote switch: minimum applicable load DC 12V, 1mA
External output
Name
OUT1
Terminal block Connector
TBO.1 1-2
CNP1
OFF
OFF
ON
ON
OFF
ON
—
CNV1
—
CNBH 1-3
Item
Water circulation pump1(AC) output
(Space heating & DHW)
Water circulation pump2(AC) output
(Space heating ONLY)
—
3-way valve1 output
—
Booster heater1 output
OUT2
TBO.1 3-4
—
OUT3
OUT4
OUT5
OUT6
—
TBO.1 7-9
—
TBO.2 5-6
—
Heating
—
OFF
—
DHW
—
ON
OUT7
TBO.2 7-8
CNBH 5-7
Booster heater2 output
OFF
ON
OUT8
TBO.2 9-10
—
Booster heater2+ output
OFF
ON
OUT9
TBO.3 5-6
CNIH
Immersion heater output
OFF
ON
—
—
—
—
Error output
Defrost output
—
Normal
Normal
—
Error
Defrost
OUT10 —
OUT11 TBO.2 11-12
OUT12 TBO.2 13-14
Wiring specification and field supply parts
Item
Name
Model and specifications
External output External output Use sheathed vinyl coated cord or cable.
function
signal wire
Max. 50 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to 1.25 mm²
Solid wire: ø 0.65 mm to ø1.2 mm
Relay, etc.
AC 230V signal 0.5 A or less
Signal/Max current
AC230V 1.0A Max Do not connect to the terminals that
are indicated as “-” in the “Terminal
block” field.
AC230V 1.0A Max
—
AC230V 0.1A Max
—
AC230V 0.5A Max
(Relay)
AC230V 0.5A Max
(Relay)
AC230V 0.5A Max
(Relay)
AC230V 0.5A Max
(Relay)
—
AC230V 0.5A Max
AC230V 0.5A Max
Notes:
1. When connecting a pump with an electric current of ≥1 or multiple
pumps, use (a) relay(s).
2. Do not connect pumps to both TBO.1 1-2 and CNP1 at the same time.
<When connecting field supply optional pumps please note the following>
Option 1. (Power supply from outdoor unit)
If the total current for optional parts is ≥3A then the fuse on the OUTDOOR
unit PCB will blow.
Option 2. (Independent power supply)
If the total current for optional pumps is ≥3A the fuse on the cylinder unit
(FTC3) PCB will blow. The total current allowed for optional parts is 3A.
Therefore if the total current for the optional pumps is ≤2A then the total
current for all other optional parts should not exceed 1A.
To avoid the fuses blowing please avoid having a total current of 3A or
greater.
21
5 System Set Up
5.3 Remote Controller Options
Factory supplied standard
The cylinder unit comes factory fitted with a main controller. This incorporates a
thermistor for temperature monitoring and a graphical user interface to enable
set-up, view current status and input scheduling functions. The main controller is
also used in servicing through the password protected service menus.
To provide the best efficiency Mitsubishi Electric recommends using automatic
adaptation function based on room temperature. To use this function a room thermistor needs to be present in a main living area. This can be done in a number of
ways the most convenient are detailed below.
Refer to heating and cooling section of this manual for instructions on how
to set compensation curve, flow temp or room temp (Auto adaptation).
For instructions on how to set the thermistor input for the FTC3 please refer
to initial settings section.
FTC3
Outdoor unit
Cylinder
The factory setting for space heating(/cooling) is room temp (auto adaptation).
If there is no room sensor present in the system, this setting must be changed
to either compensation curve mode or flow temp mode.
Control option A
Wireless receiver (optional part) Wireless remote controller
This option features the main controller and the Mitsubishi Electric wireless remote
controller. The wireless remote controller is used to monitor room temperature and can
be used to make changes to the space heating settings, boost DHW and switch to holiday mode without having to directly use the main controller.
20°C
FTC3
20°C
If more than one wireless remote controller is used, the most recent temperature settings entered will be used regardless of which controller is used to enter the settings.
The wireless receiver must be connected to the FTC3 as detailed in the wireless controller instruction manual.
DIP SW1-8 should be ON. Before operation wireless controller should be configured
to transmit and receive data as detailed in the wireless controller installation manual.
Max
8
20°C
Outdoor unit
Main controller
Cylinder
20°C
Room
Control option B
This option features the main controller and the Mitsubishi Electric thermistor wired to
the FTC3. The thermistor is used to monitor room temperature but can not make any
changes in control operation. Any changes to DHW must be made using main controller mounted on the cylinder unit.
FTC3
Room
temperature
thermistor
The thermistor is wired to the FTC3 using TH1 terminal on the terminal block TBI.1.
Only 1 room temperature thermistor can be connected to the FTC3 at 1 time.
Outdoor unit
Main controller
Cylinder
Room
Control option C
This option features the main controller and locally supplied thermostat wired to the
FTC3. The thermostat is used to set the upper limit of space heating(/cooling). Any
changes to DHW must be made using main controller mounted on the cylinder unit.
FTC3
The thermostat is wired to the FTC3 using IN1 terminal on the terminal block TBI.2.
Only 1 thermostat can be connected to the FTC3 at 1 time.
Room
temperature
thermostat
(local supply)
Outdoor unit
Main controller
Cylinder
Room
Control option D
This option features the main controller being removed from the cylinder unit and situated in a different room. All features of the main controller are still available and the inbuilt thermistor can be used for monitoring the temperature of the room in which it is
installed for Auto Adaptation function.
FTC3
Main controller
(remote position)
The main controller and the FTC3 are connected by a 2 core, 0.3 mm² , non polar cable (local supply) maximum length of 500 m.
If using the sensor in the main controller it should be detached from cylinder unit. Otherwise it will detect the temperature of cylinder unit instead of room temperature. This
will influence the output of the space heating.
Outdoor unit
Cylinder
Mitsubishi Electric main control cover blank should be used to fill the resultant gap on
the cylinder left by the removal of the control panel.
22
Room
5 System Set Up
Remote Installation of Main Controller
The following instructions are related to a system controlled as in Control option D.
<Accessory>
Main controller cover
<Removing the main controller from the cylinder unit>
1. Open front panel of cylinder unit.
2. Remove the four screws from the metal back plate of main controller using a
screwdriver.
3. Untwist wire clip and lift off the metal back plate.
4. Gently pull apart the clips holding the main controller in place. Be careful not
to use too much force as this may break the holding clips.
Main controller
5. Lift out the main controller from the front panel of the cylinder unit.
After removing the main controller, fill the resulting hole using the main controller
cover.
<Figure 5.3.1>
Removing main controller
6. Separate the back and front panel using a flat head screwdriver as shown in
Figure 5.3.
Terminal block for controller -FTC3
connection cable
Front plate
Back plate
<Figure 5.3.2>
Opening the main controller
7. Fix the 2 core cable from the FTC3 into the terminal. Ensure the wires make
good contact and are securely screwed into the terminal block.
8. The inner core wires should not be visible from the outside of the back plate.
9. The sheathed cable should be pressed into the sunken channel so it is flush
with the base plate.
10. Once the connection cable is in place screw the back plate to the wall using
screws suitable for use on the chosen wall (local supply).
10 mm
6 mm
<Figure 5.3.3>
Securing the connection cable
11. Finally replace the front cover plate.
Note:
Wiring for main controller cable shall be (5 cm or more) apart from power
source wiring so that it is influenced by electric noise form power source
wiring. (Do not insert main controller cable and power source wiring in the
same conduit.)
<Figure 5.3.4>
Securing the base plate to the wall
23
5 System Set Up
5.4 Main Controller
<Main controller parts>
A
F1
F2
F3
C
Name
Function
A
B
Screen
Menu
C
D
E
Back
Confirm
Power/Holiday
F1-4
Function keys
Screen in which all information is displayed
Access to system settings for initial set up and
modifications.
Return to previous menu.
Used to select or save. (Enter key)
If system is switched off pressing once will turn system on. Pressing again when system is switched on
will enable Holiday Mode. Holding the button down
for 3 secs will turn the system off. (*1)
Used to scroll through menu and adjust settings.
Function is determined by the menu screen visible
on screen A.
F4
*1
When the system is switched off or the power supply is disconnected, the
cylinder protection functions (e.g. freeze stat. function) will NOT operate.
Please beware that without these safety functions in operation the cylinder
may be damaged.
E
B
Letter
D
<Main screen icons>
Icon
Description
2
Legionella
prevention
Heat pump
3
Electric heater
4
Target
temperature
When this icon is displayed ‘Legionella prevention
mode’ is active.
When this icon is displayed the ‘Heat pump’ is in
use.
When this icon is displayed the ‘Electric heaters’ are
in use.
Target flow temperature
5
OPTION
6
7
8
+
Information
9
Space heating
(cooling) mode
1
12
11
2
1
3
10
4
9
10
11
12
DHW mode
Holiday mode
Target room temperature
Pressing the function button below this icon will display the quick view menu.
Increase desired temperature.
Decrease desired temperature.
Pressing the function button below this icon displays
the information screen.
Heating mode
Cooling mode
(This mode is not available on all models)
Normal or ECO mode
When this icon is displayed ‘Holiday mode’ activated.
Timer
Prohibited
Stand-by
8
7
6
5
Stop
Operating
24
5 System Set Up
<Main Controller Menu Tree>
Unrestricted access
Installer only
Initial
Main screen F1
Information
Option
F4
F1
F2
F3
F4
Forced DHW
DHW
Heating/Cooling
Holiday
ON/OFF
ON/OFF/Timer
ON/OFF/Timer
Active/Non active
Set time
Main menu
DHW
Normal
Eco
Edit
DHW max. temp
DHW temperature drop
DHW max. operation time
DHW mode restriction
Legionella
Active/Non active
Edit
Hot water temp. setting
Frequency setting
Start time setting
Max. operation time setting
Duration of max. temp. setting
Heating
Flow temp
Room temp
Compensation curve
Cooling
Flow temp
Room temp
Heating/Cooling mode
F2 (PREVIEW)
F3 (EDIT)
Compensation curve preview
Compensation curve edit
F2
F4
Curve parameters
Adjustment
Schedule timer menu
Heating
Day select
Time select
Time setting
Cooling
Schedule timer preview
DHW
Temp. setting
Holiday setting
F1
DHW active /non active
F2
Heating/Cooling active/non active
F3 (EDIT)
Holiday menu
Heating room temp.
Heating flow temp.
Cooling room temp.
Cooling flow temp.
Initial settings
Date/Time
yyyy/mm/dd/hh:mm
Language
ENG/GER/FR/NL/SP/IT/PT/DA/SW/NOR/FIN
°C/°F
°C/°F
Temp. display
Yes/No
Contact number
Time display
hh:mm/hh:mm AM/AM hh:mm
Room sensor setting
Sensor setting
TH1/Main controller/Room RC1-8
Select time/zone setting
Service menu (Password protected)
Manual operation
Function setting
Thermistor adjustment
Auxiliary setting
Electric heater
On
Delay timer
Economy setting for pump
On
Delay timer
Freeze stat function
Flow temp
Min. ambient temp protection
Heat source setting
Standard (Heat pump & electric heaters)
Heater (Electric heaters only)
Multiple unit control
Running information
Thermistor reading
Summary of setting
Error history
Password protection
Main controller
Yes/No
Manual reset
FTC
Yes/No
}
25
5 System Set Up
Setting the Main Controller
After the power has been connected to the outdoor and cylinder units (See chapter 4.6) the initial system settings can be entered via the main controller.
1. Power supply
i. Check all breakers and other safety devices are correctly installed and turn
on power to the system.
ii. Main controller will automatically start up.
Wait approximately 2 mins whilst the control menus load.
2. Controller settings
When the controller is ready a blank screen with a line running across the top
will be displayed.
i. Press button E (Power)
If this is the first time the controller has been switched on you will automatically be directed to the Initial settings menu.
* When the system is off, freeze stat. function is not performed.
Initial Settings
From the initial settings menu the installer can set the language, date/time, temperature unit (°C/°F), emergency contact number, room sensor setting, and display options.
1. Use buttons F1 and F2 to move scroll through the menu list. When the title is
highlighted press CONFIRM to edit.
2. Use function buttons appropriate to edit each setting then press CONFIRM to
save the setting.
3. For room sensor setting it is important to choose the correct room sensor depending on the heating or cooling mode the system will operate in.
Control option (p22)
A
B
C
D
Corresponding initial settings room sensor
Room RC1-8 (only 1 can be selected)
TH1
N/A (Option C uses a thermostat with off/on signal only,
temperature is not detected by FTC3)
Main controller
NOTE
If you wish to operate in time/zone mode please select this from the room sensor setting menu then edit the schedule under ‘Select Time/Zone’ to reflect which
room sensor you want operational for the given time period.
Once the controller initial settings are complete, settings for the main modes can
be entered. To return to the main settings menu screen from the initial settings
screen, press the BACK button.
Main Settings Menu
The main settings menu can be accessed by pressing the MENU button. To reduce the risk of untrained end users altering the settings accidentally there are
two access levels to the main settings; and the service section menu is password protected.
User Level – Short press
If the MENU button is pressed once for a short time the main settings will be
displayed but without the edit function. This will enable the user to view current
settings but NOT change the parameters.
Installer Level – Long press
If the MENU button is pressed down for 3 secs the main settings will be displayed
with all functionality available.
Icon
Description
Hot water (DHW)
The following items can be viewed and/or edited (dependent on access level).
• Domestic Hot water (DHW)
• Heating (and Cooling)
• Schedule timer
• Holiday mode
• Initial settings
• Service (Password protected)
Heating/Cooling
Use the F2 and F3 buttons to move between the icons. The highlighted icon will
appear as a larger version in the centre of the screen. Press CONFIRM to select
and edit the highlighted mode.
Initial setting
26
Schedule timer
Holiday mode
Service
5 System Set Up
Mode 1 - Domestic Hot Water (DHW)/Legionella Prevention
The domestic hot water and legionella prevention menus control the operation of
domestic hot water tank heat ups.
<DHW mode settings>
1. Highlight the hot water icon and press CONFIRM.
2. Use button F1 to switch between Normal and ECO heating modes.
3. To edit the mode press F2 to display the HOT WATER (DHW) SETTING menu.
4. Use F2 and F3 keys to scroll through the menu selecting each component in
turn by pressing CONFIRM. See the table below for description of each setting.
5. Enter the desired number using the function keys and press CONFIRM.
Menu subtitle
Function
Range
Unit
Default value
DHW max. temp
DHW max. temperature
drop
DHW max. operation time
DHW mode restriction
Desired temperature of stored hot water
Difference in temperature between DHW max. temp and the temperature at which DHW mode starts
40–60
5–30
°C
°C
50
10
min
min
30
30
Max time allowed for stored water heating DHW mode
30–120
The time period after DHW mode when space heating has priority over DHW mode temporarily 30–120
preventing further stored water heating
(Only when DHW max. operation time has passed.)
<Explanation of DHW operation>
• When the tank temperature drops below the ‘DHW max. temp.’ set by the installer, DHW mode operates and the flow from the primary heating circuit is
diverted to heat the water in the storage tank.
• When the temperature of the stored water reaches the ‘DHW max. temp.’ set by
the installer or if the ‘DHW max. operation time’ set by the installer is exceeded
DHW mode ceases to operate.
• Whilst DHW mode is in operation hot water is not directed to the space heating
circuit.
• Directly after DHW mode operation ‘DHW mode restriction’ will operate. The duration of this feature is set by the installer and during its operation DHW mode
can not be reactivated, allowing time for the system to deliver hot water to the
space heating if required.
• After the ‘DHW mode restriction’ operation the DHW mode can operate again
and tank heating will continue according to system demand.
Tank temp.
Stop
DHW max.
temp.
DHW max.
temp. drop
DHW
start temp.
Restart
Start
Time
DHW mode
DHW mode
Tank temp.
<Eco mode>
DHW mode can run in either ‘Normal’ or ‘Eco’ mode. Normal mode will heat the
cylinder quickly using the full power of the heat pump. Eco mode takes a little
longer to heat the cylinder but the energy used is reduced. This is because heat
pump operation is restricted using signals from the FTC3 based on measured
cylinder temperature.
Stop
DHW max.
temp.
Stop
Restart
DHW max.
temp. drop
DHW
start temp.
Note:
The actual energy saved in Eco mode will vary according to outdoor temperature.
Start
DHW max.
operation time
DHW mode
restriction DHW mode
Time
Return to the DHW/legionella prevention menu.
Legionella Prevention Mode settings
1. Use button F3 to chose legionella mode active YES/NO.
2. Use button F4 to edit the legionella function.
3. Use F2 and F3 keys to scroll through the menu selecting each subtitle in turn
by pressing CONFIRM. See the table below for description of each setting.
4. Enter the desired number using the function keys and press CONFIRM.
During Legionella Prevention Mode the temperature of the stored water is increased above 60°C to inhibit legionella bacterium growth. It is strongly recommended that this is done at regular intervals. Please check local regulations for
the recommended frequency of heat ups.
Menu subtitle
Function
Range
Unit
Default value
Legionella hot water temp.
Frequency
Start time
Max. operation time
Duration of max. temp.
Desired temp of stored hot water
Time between LP mode tank heat ups
Time when LP mode will begin
Maximum time allowed for LP mode tank heat
The time period after LP mode max. water temp has been reached
60–70
1–30
0:00–23:00
1–5
1–120
°C
day
65
15
03:00
3
30
hour
min
27
5 System Set Up
<Explanation of Legionella Prevention Mode operation>
• At the time entered by the installer ‘Start time’ flow useful heat from the system
is diverted to heat the water in the storage tank.
• When the temperature of the stored water exceeds the ‘Hot Water temp.’ set by
the installer (above 65°C) water is no longer diverted to the tank.
• Whilst LP mode is in operation hot water is not directed to the space heating
circuit.
• Directly after LP mode operation ‘Duration of max. temp’ will operate. The duration of this feature is set by the installer and during its operation stored water
temperature will be monitored.
• If stored water temperature should drop to LP restart temp, LP mode will restart
and water flow from the plate heat exchanger will be directed to the tank to
boost the temperature. Once the set time for Duration of Max. temp has passed
LP mode will not recur for the set interval (set by installer).
• It is the responsibility of the installer to ensure the settings for legionella prevention are compliant with local and national guidelines.
Tank temp.
Stop
Stop
Restart
Stop temp.
Hot water temp.
Restart temp.
Start
LP mode
Space
Heating LP mode
Mode
finish
Time
Duration of Max. temp.
( LP mode : Legionella Prevention Mode )
Please note that LP mode uses the assistance of electric heaters (if present)
to supplement the energy input of the heat pump. Heating water for long
periods of time is not efficient and will increase running costs. The installer
should give careful consideration to the necessity of legionella prevention
treatment whilst not wasting energy by heating the stored water for excessive
time periods. The end user should understand the importance of this feature.
ALWAYS COMPLY WITH LOCAL AND NATIONAL GUIDANCE FOR YOUR
COUNTRY REGARDING LEGIONELLA PREVENTION.
Forced DHW
The forced DHW function is used to force the system to operate in DHW mode. In
normal operation the water in the DHW tank will be heated either to the set temperature or for the maximum DHW time, whichever occurs first. However should
there be a high demand for hot water ‘Forced DHW’ function can be used to
prevent the system switching to space heating (/cooling) and continue to provide
DHW tank heating.
Forced DHW mode is activated by pressing button F1 when the ‘Option Screen’
is displayed.
Mode 2 - Heating/Cooling
The heating and cooling menus deal with space heating and cooling using either
a radiator or under-floor system depending on the installation.
Cooling is only available on ERPT models. Cooling menus will not be displayed
unless the cylinder unit is an ERPT model.
From the main settings menu
1. Use F1 and F2 buttons to highlight heating/cooling icon then press CONFIRM.
2. The heating and cooling menu will be displayed.
3. To select the sub-menus press the function button below the icon required.
E.g. for MODE change press F1
Heating/Cooling
1. Under this sub-menu the mode of heating or cooling is selected.
2. For HEATING choose between
• Flow temperature ( )
)
• Room temperature (
)
• Compensation curve (
3. For COOLING choose between
If using an under floor system in cooling mode the flow temperature must be
selected and it should be set to avoid creating condensation.
• Flow temperature ( )
)
• Room temperature (
4. To choose between the different modes for heating and cooling highlight the
mode preferred and press select.
5. Press the BACK button to return to the heating and cooling menu.
If compensation curve mode was selected as the heating mode please read the
following instructions.
28
5 System Set Up
<Compensation curve setting>
1. From the heating/cooling menu select edit using the F3 function button.
2. The compensation curve setting screen will be displayed.
3. Press F2 to alter the Hi parameter (when flow temp is maximum and outdoor temp is minimum).
4. Press F3 to alter the Lo parameter (when flow temp is minimum and outdoor temp is maximum).
5. Press F4 to add an extra point (adjust).
Pressing F2-4 will cause the relevant edit screen to be displayed. Editing Lo and
Hi parameters is done in the same way; please see the following for more detailed explanation of parameter editing.
In the parameter (Lo/Hi) edit screen the flow temperature and outdoor temperature for the compensation curve graph can be set and altered for the 2 extremes
of Hi and Lo.
1. Press F1 and F2 to change the flow temperature (y-axis of compensation
curve).
2. Pressing F1 will raise the flow temperature for the set outdoor temperature.
3. Pressing F2 will lower the flow temperature for the set outdoor temperature.
4. Press F3 and F4 to change the outdoor temperature (x-axis of compensation curve).
5. Pressing F3 will lower the outdoor temperature for the set flow temperature.
6. Pressing F4 will raise the outdoor temperature for the set flow temperature.
< Explanation of compensation curve >
During late spring and summer usually the demand for space heating is reduced.
To prevent the heat pump from producing excessive flow temperatures for the
primary circuit the compensation curve mode can be used to maximise efficiency
and reduce running costs.
The compensation curve is used to restrict the flow temperature of the primary
space heating circuit dependent on the outdoor temperature. The FTC3 uses
information from both an outdoor temperature sensor and a temperature sensor
on the primary circuit supply to ensure the heat pump is not producing excessive
flow temperatures if the weather conditions do not require it.
<Holiday mode>
Holiday mode can be activated in 2 ways. Both methods will result in the holiday
mode activation screen being shown.
Option 1.
From the main menu screen button E should be pressed. Be careful not to hold
down button E for too long as this will turn off the controller and system.
Option 2.
From the main menu screen press button F4. The current settings screen will be
displayed. Press button F4 again to access the holiday mode activation screen.
Once the holiday mode activation screen is displayed you can activate/deactivate
and select the duration that you would like holiday mode to run for.
• Press button F1 to activate or deactivate holiday mode.
• Use buttons F2, F3 and F4 to input the date which you would like holiday
mode to activate or deactivate for space heating (cooling).
<Editing holiday mode>
To change the holiday mode settings e.g. the flow temp, you must access the
holiday mode menu from the main settings menu.
1. From main menu screen press button B.
2. Use buttons F2 and F3 to scroll through menu until Holiday Mode is highlighted.
3. Press CONFIRM button.
4. The holiday mode status screen is displayed.
5. To change the flow temperature or room temperatures on heating (or cooling)
mode (if available) press button F3.
6. A list of variables will be displayed. Choose the one you wish to modify using
buttons F1/F2 then press CONFIRM.
7. Adjust the temperature using buttons F3 and F2 and press CONFIRM button
to save changes.
Holiday Mode activation screen
Holiday Mode status screen
29
5 System Set Up
Mode 3 - Schedule timer
The schedule timer mode allows daily and weekly space heating/cooling and
DHW patterns to be entered.
1. From the main settings menu use F2 and F3 to highlight the schedule timer
icon then press CONFIRM.
2. The schedule timer sub menu will be displayed. The icons show the following
modes;
• Heating
• Cooling [if available]
• DHW
3. Use F2 and F3 buttons to move between mode icons press CONFIRM to be
shown the PREVIEW screen for each mode.
The PREVIEW screen allows you to view the current settings. Days of the week
are displayed across the top of the screen. Where day appears underlined the
settings are the same for all those days underlined.
Hours of the day and night are represented as a bar across the main part of the
screen. Where the bar is solid black heating/DHW (whichever is selected) is allowed.
<Setting the schedule timer>
1. In the PREVIEW menu screen press F4 button.
2. First select the days of the week you wish to schedule.
3. Press F2/F3 buttons to move between days and F1 to check or uncheck the
box.
4. When you have selected the days press CONFIRM.
5. The time bar edit screen will be displayed.
6. Use buttons F2/F3 to move to the point at which you do not want the selected
mode to be active press CONFIRM to start.
7. Use F3 button to set the required time of inactivity the press CONFIRM.
8. You can add up to 4 periods of inactivity within a 24 hour interval.
9. Press F4 to save settings.
When scheduling heating/cooling, button F1 changes the scheduled variable
between time and temperature. This enables a lower temperature to be set for a
number of hours e.g. a lower temperature may be required at night when the occupants are sleeping.
Notes:
• The schedule timer for space heating and DHW are set in the same way.
However for DHW only time can be used as scheduling variable.
• A small rubbish bin character is also displayed choosing this icon will delete the last unsaved action.
• It is necessary to use the SAVE function F4 button to save settings CONFIRM does NOT act as SAVE for this menu.
30
5 System Set Up
Service Menu
The service menu provides functions for use by installer or service engineer. It
is NOT intended the home owner alters settings within this menu. It is for this
reason password protection is required to prevent unauthorised access to the
service settings.
1. From the main setting menu use F2 and F3 to highlight the service icon then
press CONFIRM.
2. You will be prompted to enter a password. THE FACTORY DEFAULT PASSWORD IS 0000.
3. Press CONFIRM.
(It takes approx. 30 secs to load the service menu.)
The service menu is navigated using the F1 and F2 buttons to scroll through the
functions. The menu is split across two screens and is comprised of the following
functions;
1. Manual operation
2. Function setting
3. Thermistor adjustment
4. Auxiliary setting
5. Heat source setting
6. Multiple unit control (This function is not available for cylinder unit.)
7. Running information
8. Thermistor reading
9. Summary of setting
10. Error history
11. Password protection
12. Manual reset
In this Installation Manual instructions will be given only for the following functions;
1. Auxiliary setting
2. Manual operation
3. Heat source setting
4. Password protection
5. Manual reset
Screen 1 of service menu
Screen 2 of service menu
Information on the other functions can be found by consulting the technical or
service manuals.
<General operation>
Many functions can not be set whilst the indoor unit is running. The installer
should turn OFF the unit before trying to set these functions. If the installer attempts to change the settings whilst the unit is running the main controller will
display a reminder message prompting the installer to stop operation before continuing. By selecting Yes the unit will cease operation and changes can be made
to the service settings.
If text is displayed in white on a black background CONFIRM button must be
pressed to save this choice.
System off prompt screen
Action requires confirmation
Action is confirmed
31
5 System Set Up
Auxiliary Setting
This function is used to set the parameters for any auxiliary parts used in the system.
From the service menu use F1 and F2 buttons to highlight Auxiliary setting then
press CONFIRM.
Auxiliary setting menu screen
<Electric heater setting>
1. From the Auxiliary setting menu highlight Electric Heater.
2. Press CONFIRM.
3. The electric heater screen will be shown.
4. Press button F1 to switch ON/OFF an immersion heater.
5. Press button F2 to switch ON/OFF an booster heater for space heating.
6. Use buttons F3 and F4 to adjust the time period the booster heater will assist
in space heating. (5 ~ 180 min)
Electric heater screen
<Economy settings for pump>
1. From the Auxiliary setting menu highlight Economy Settings for pump.
2. Press CONFIRM.
3. The economy settings for pump screen will be displayed.
4. Use button F1 to switch the pump ON/OFF.
5. Use buttons F3 and F4 to adjust the time the pump will run. (3 ~ 60 min)
Economy settings for pump screen
<Frost prevention>
1. From the Auxiliary setting menu highlight Freeze Stat Function.
2. Press CONFIRM.
3. The freeze stat function screen will be displayed.
4. Use buttons F3 and F4 to adjust the minimum outdoor temperature which
freeze stat function will begin to operate, (5 ~ 20 °C) or choose .
If asterisk ( ) is chosen freeze stat function is deactivated.
32
5 System Set Up
<Manual operation>
During the filling of the system the pump and 3-way valve can be manually overridden using manual operation mode.
When manual operation is selected a small timer icon appears in the screen. The
function selected will only remain in manual operation for a maximum of 2 hours.
This is to prevent accidental permanent override of the FTC3.
1. From the service menu use F1 and F2 buttons to scroll through list until Manual Operation is highlighted.
2. Press CONFIRM.
3. Manual operation menu screen is displayed.
4. To activate manual operation press the function button under the desired part.
5. To return to service menu press MENU or BACK button.
►Example
Pressing F3 button will switch manual operation mode ON for the main 3-way
valve. When filling of the tank is complete the installer should access this menu
again and press F3 to deactivate manual operation of the part. Alternatively after
2 hours manual operation mode will no longer be active and FTC3 will resume
control of the part.
Manual operation menu screen
NOTE:
Manual operation and heat source setting can not be selected if the system
is running. A screen will be displayed asking the installer to stop the system before these modes can be activated.
The system automatically stops 2 hours after last operation.
System off prompt screen
<Heat source setting>
The default heat source setting is heat pump and all electric heaters present in
the system to be operational. This is referred to as Standard operation on the
menu.
1. From the service menu use F1 and F2 buttons to scroll through list until Heat
Source Setting is highlighted.
2. Press CONFIRM.
3. Heat source setting menu screen is displayed.
4. Press F3 button to until preferred heat source is displayed.
5. Press CONFIRM.
6. To return to service menu press MENU or BACK button.
7. If you wish to return to the service menu without saving the setting press return button. You will be asked if you are sure you wish to cancel the changes.
Choose Yes or No as appropriate.
Heat source setting screen
Cancel last action screen
33
5 System Set Up
<Password protection>
Password protection is available to prevent unauthorised access to the service
menu by untrained persons.
1. From the service menu use F1 and F2 buttons to scroll through list until Password protection is highlighted.
2. Press CONFIRM.
3. When password input screen is displayed use buttons F1 and F2 to move left
and right between the four digits, F3 to lower the selected digit by 1, and F4 to
increase the selected digit by 1.
4. When you have input your password press CONFIRM.
5. The password verify screen is displayed.
6. To verify your new password press button F3.
7. Your password is now set and the completion screen is displayed.
8. To return to service menu press MENU or BACK button.
Password input screen
<Resetting the password>
If you forget the password you entered, or have to service a unit somebody else
installed, you can reset the password to the factory default of 0000.
1. From the main settings menu scroll down the functions until Service Menu is
highlighted.
2. Press CONFIRM.
3. You will be prompted to enter a password.
4. Hold down buttons F3 and F4 together for 3 secs
5. You will be asked if you wish to continue and reset the password to default setting.
6. To reset press button F3.
7. The password is now reset to 0000.
Password verify screen
Completion screen
<Manual reset>
Should you wish to restore the factory settings at any time you should use the
manual reset function. Please note this will reset ALL functions to the factory default settings.
1. From the service menu use F1 and F2 buttons to scroll through list until Manual Reset is highlighted.
2. Press CONFIRM.
3. The manual reset screen is displayed.
4. Choose either Manual Reset for FTC or Main Controller.
5. Press F3 button to confirm manual reset of chosen device.
34
6 Commissioning
Pre-commissioning Checklist
Before commissioning the cylinder system complete the following table to ensure
the necessary checks are carried out.
No
System commissioning checklist
Notes
1
2
Installation location
Air flow around the unit
Maintenance access
3
4
5
Pipe work
Total pipe length
Height difference
System chemically cleansed and
flushed
Insulation type and thickness
Correct cables used
Electrical maintenance access
Connection of mains power source Outdoor unit electric cable
6
7
8
9
Electrical wiring
Outdoor unit
Cylinder unit
Outdoor unit
Outdoor to indoor
Outdoor to indoor
Good/Poor
Good/Poor
Good/Poor
m
m
Yes/No
Good/Poor
Type
Size
Indoor unit electric cable
Type
Size
10
11
12
13
14
Connection of control cable
Anti-freeze
Refer to product guidelines.
Check pre-charge in the expansion vessel(s)
Pressurise circuit to 1 bar
Release air from system
%
Yes/No
Yes/No
Yes/No
Outdoor unit (PACKAGE type) operation checklist
15
16
17
18
19
Outdoor unit details
Power source (V)
Model No.
L-N
L1 - L2
Excessive vibration/noise
Compressor
Fan
Unit mounted on anti-vibration pads (Tico Pads)
Provision made for condensate removal
1ø
3ø
Serial No.
L2 - L3
Yes/No
Yes/No
L3 - L1
Yes/No
Yes/No
Notes/Comments:
35
7 Service and Maintenance
The indoor cylinder unit is UNVENTED. Under UK law* the system must be
serviced once a year by a qualified individual. Servicing and maintenance of the
outdoor unit should only be done by a Mitsubishi Electric trained technician with
relevant qualifications and experience. Any electrical work should be done by a
tradesperson with the appropriate electrical qualifications. Any maintenance or
‘DIY’ fixes done by a non-accredited person could invalidate the Warranty and/or
result in damage to the cylinder unit and injury to the person.
* Building regulations – England & Wales Part G3, Scotland P3, Northern Ireland
P5. If outside of the UK please refer to local building regulations regarding unvented hot water storage.
Basic Troubleshooting for Cylinder Unit
Fault symptom
Possible cause
Cold water at tap
Direct – Booster heater cut out has triggered.
Solution
Check booster heater thermostat and press reset button if safe.
Reset button is covered with white rubber cap see component
parts diagram page 7 for position.
Direct – Booster heater breaker (ECB1) has tripped.
Check the cause of the trip and reset if safe.
Direct – The booster heater thermal cut-out has operated and can Check the resistance of the thermal cut out, if 0 then the connecnot be reset using the Manual reset button.
tion is broken and the booster heater will have to be replaced.
Please contact your Mitsubishi Electric dealer.
Direct – Immersion heater cut out has triggered.
Check immersion heater thermostat and press reset button, located on immersion heater boss, if safe. If the heater has been
operated with no water inside it may have failed, so please replace
it with a new one.
Direct – Immersion heater breaker (ECB2) has tripped.
Check the cause of the trip and reset if safe.
Indirect – 3-way valve fault
Check plumbing/wiring to 3-way valve.
Indirect – Heat Pump not working.
Check heat pump – consult outdoor unit service manual.
All hot water used.
Ensure DHW mode is operating and wait for tank to re-heat.
Water discharges from expan- If continual – locally supplied pressure reducing valve not working. Check function of pressure reducing valve and replace if necessary.
sion relief valve
If continual – expansion relief valve seat may be damaged.
Remove cartridge – check seat and renew if necessary.
If intermittent – expansion vessel charge may have reduced/blad- Check pressure in expansion vessel. Recharge to 1 bar if necesder perished.
sary. If bladder perished replace vessel.
Unit is being back pressurised.
With cylinder cold check pressure in cylinder. If this is the same as
the incoming mains pressure then you are getting backfeed. Install
a balanced cold supply.
Water discharges from tempera- Unit has overheated – thermal controls have failed.
Switch off power to the heat pump and immersion heaters. Leave
ture and pressure relief valve
water supply on. Wait until discharge stops. Isolate water supply
(EHPT20X-VM2HA only)
and replace if faulty.
Milky/Cloudy water
Oxygenated water
Water from any pressurised system will release oxygen bubbles
when flowing. The bubbles will settle out.
No hot water flow
Cold main off.
Check and open stop cock.
Strainer blocked .
Isolate water supply and clean strainer.
Noise during hot water draw off Loose airing cupboard pipework.
Install extra pipe fastening clips.
typically worse in the morning
Noisy pump
Air in pump.
Use manual and automatic air vents to remove air from system.
Top up water if necessary to achieve 1bar on primary circuit.
Pump runs for a short time for no Pump jam prevention mechanism to inhibit the build up of scale.
Normal operation no action necessary.
reason.
Hot or warm water from cold tap If tap runs cold after a minute or so the pipe is picking up heat from Insulate/re-route pipe work.
heating pipe work.
Heating system does not get up Prohibit, schedule timer or holiday mode selected.
Check settings and change as appropriate.
to set temperature.
Incorrectly sized radiators
Contact installer
The room in which the temperature sensor is located is at a differ- Reposition the temperature sensor to a more suitable room.
ent temperature to the rest of the house.
Battery problem *wireless control only
Check the battery power and replace if flat.
Mechanical noise heard coming Heaters switching on/off
Normal operation no action required.
from the cylinder unit.
3-way valve changing position between DHW and heating (cooling) Normal operation no action necessary.
mode.
After DHW operation room tem- At the end of the DHW mode operation the 3-way valve diverts hot Normal operation no action necessary.
perature rises a little.
water away from the cylinder into space heating/cooling circuit.
This is done to prevent the cylinder unit components from overheating. The amount of hot water directed into the space heating
circuit is dependent on the type of system and the pipe run between the plate heat exchanger and the cylinder unit.
Annual Maintenance
It is essential that the cylinder unit is serviced at least once a year by a qualified
individual any spare parts required should be purchased from Mitsubishi Electric.
NEVER bypass safety devices or operate the unit without them being fully operational.
<Draining the cylinder unit>
WARNING: DRAINED WATER MAY BE VERY HOT
1. Before attempting to drain the cylinder isolate from the electrical supply to prevent the immersion and booster heaters burning out.
2. Isolate cold water feed to tank.
3. Attach a hose to the tank drain cock (No. 17 on Figure 3.1). The hose should
be able to withstand heat as the emptied water could be very hot. The hose
should drain to a place lower than the tank bottom to encourage siphoning.
Open a hot water tap to start draining without a vacuum.
4. When the tank is drained close drain cock and hot tap.
5. Attach hose to booster heater drain cock and water circuit drain cock (No.13
and No. 16 on Figure 3.1). The hose should be able to withstand heat as the
emptied water could be very hot. The hose should drain to a place lower than
the booster heater drain cock to encourage siphoning.
36
<Annual maintenance points>
Use the Annual Maintenance Log Book as a guide to carrying out the necessary
checks on the cylinder and outdoor unit.
7 Service and Maintenance
Error Codes
Code
Error
L1
Booster heater overheat detection
L2
L3
L4
L5
L6
L7
Booster heater thermistor (THW3) failure
Circulation water temperature overheat protection
Tank water temperature overheat protection
Indoor unit temperature thermistor (TH1, TH2, THW1, THW2, THW5B) failure
Circulation water freeze protection
3-way valve failure (Valve direction defaults to DHW circuit)
Flow water temperature thermistor (THW1) detached from water pipe
Tank water temperature thermistor (THW5B) detached from DHW tank
L8
L9
Low primary circuit flow rate detected by flow switch
J0
Signal transmission failure between FTC3 and wireless receiver
J1 - J8
Communication failure between wireless receiver and wireless remote controller
E0 - E5
Communication failure between main controller and FTC3
E6 - EF
Communication failure between FTC3 and outdoor unit
E9
Outdoor unit receives no signal from indoor unit.
U*, F*
Outdoor unit failure
Action
Flow rate may be reduced check for;
• Water leakage
• Strainer blockage
• Pump function (Error code may display during filling of primary circuit,
complete filling and reset error code.)
Check the resistance of the thermistor.
See Action for L1.
Check the immersion heater and it’s contactor.
Check the resistance of the thermistor.
See Action for L1.
Check the motion of the 3-way valve.
Re-attach any thermistors that have become dislodged.
See Action for L1. If the flow switch itself does not work, replace it.
The pump valves may be hot, please take care.
Check connection cable for damage or lose connections.
Check wireless remote controller’s battery is not flat.
Check the pairing between wireless receiver to wireless remote controller.
Test the wireless communication. (See the manual of wireless system)
Check connection cable for damage or loose connections.
Check that the outdoor unit has not been turned off.
Check connection cable for damage or loose connections.
Refer to outdoor unit service manual.
Check both units are switched on. Check connection cable for damage or
loose connections. Refer to outdoor unit service manual.
Refer to outdoor unit service manual.
Note: To cancel error codes please switch system off (Press button E, on Main Controller, for 3 secs).
37
7 Service and Maintenance
Engineers Forms
Commissioning/Field settings record sheet
Parameters
Main
Option
Setting
DHW
Legionella prevention
Heating/Cooling
Compensation
curve
Lo set point
Hi set point
Adjust
Schedule timer
Holiday
Initial settings
Service menu
Forced DHW operation
DHW
Heating/Cooling
Holiday mode
Operation mode
DHW max. temp
DHW temperature drop
DHW max. operation time
DHW mode restriction
Active
Hot water temp
Frequency
Start time
Max. operation time
Duration of max. operation time
Operation mode
Heating
Cooling
Heating room temp
Heating flow temp
Cooling room temp
Cooling flow temp
Outdoor ambient temp
Flow temp
Outdoor ambient temp
Flow Temp
Outdoor Ambient Temp
Flow temp
Active
DHW
Heating/Cooling
Heating room temp
Heating flow temp
Cooling room temp
Cooling flow temp
Language
°C/°F
Temp display
Time display
Room sensor setting
Manual operation
Thermistor adjustment
Auxiliary setting
Electric heater
Economy setting for pump
Freeze stat
function
Heat source setting
38
Default
setting
On/Off
On/Off/Timer
On/Off/Timer
Active/Non active/Set time
Normal/Eco
40°C – 60°C
5°C – 30°C
30 – 120 mins
30 – 120 mins
Yes/No
60°C – 70°C
1 – 30 days
00.00 – 23.00
1 – 5 hours
1 – 120 mins
Flow temp/Compensation curve/Room temp
Flow temp/Room temp
10°C – 30°C
25°C – 60°C
10°C – 30°C
5°C – 25°C
-15°C – 35°C
25°C – 60°C
-15°C – 35°C
25°C – 60°C
-15°C – 35°C
25°C – 60°C
Yes/No
Active/Non active
Active/Non active
10°C – 30°C
25°C – 60°C
10°C – 30°C
5°C – 25°C
ENG/PT/NOR/FIN/NL/DA/IT/SP/SW/GER/FR
°C/°F
On/Off
hh:mm/hh:mm AM/AM hh:mm
TH1/Main RC/Room RC1-8/(Time/Zone)
Supplementary pump or 3 way valve On/Off
-10°C — +10°C
DHW: Used/Not Used
Space heating: Used/Not Used
Electric heater delay timer (5-180 mins)
Active/Not active
Time before pump switched off (3-60 mins)
Outdoor ambient temperature (5-20°C)
Off
On
On
Non active
Normal
50°C
10°C
30 mins
30 mins
Yes
65°C
15 days
03.00
3 hours
30 min
Room temp
Standard/Heater
Standard
20°C
45°C
25°C
15°C
35°C
25°C
-15°C
60°C
—
—
No
Non active
Active
15°C
35°C
30°C
25°C
ENG
°C
Off
—
TH1
Off
0°C
Used
Used
30 mins
Active
5 mins
5°C
Field
setting
Notes
7 Service and Maintenance
Annual Maintenance Log Book
Contractor name
Site name
Cylinder maintenance record sheet
Warranty number
No.
Mechanical
Turn OFF water supply, drain tank, remove mesh from strainer clean and
1
replace in strainer.
Keep water supply OFF, open hot water taps and check the expansion
2
vessel charge pressure. Top up if necessary (1 bar).
Turn water supply ON, open the pressure relief valve and then the
expansion valve in turn. Check for unrestricted discharge to the tundish
3
and that the valves reseat correctly. Check there are no blockages in the
tundish and associated pipe work.
4
In hard water areas de-scaling of the immersion heaters may be required.
Drop the primary/heating system pressure to zero check and if necessary
5
top up the expansion vessel (1 bar).
Check and if necessary top up the concentration of anti-freeze/inhibitor (if
6
used in the system).
Top up the primary/heating system using the filling loop and re-pressurise
7
to 1 bar.
Heat system and check pressure does not rise above 3 bar and no water
8
is released from the safety valves.
9
Release any air from the system.
Refrigerant SA models only
1
Refer to outdoor unit manual.
Electrical
1
Check condition of cables.
2
Check rating and fuse fitted on the electricity supply.
Controller
1
Check field settings against factory recommendations.
2
Check operation of motorized valves ensure they reseat correctly.
3
Check battery power of wireless thermostat and replace if necessary.
Outdoor heat pump unit maintenance record sheet
Model number
Mechanical
1
Inspect grill and air inlet for trapped debris/damage.
2
Check condensate drain provision.
3
Check integrity of water pipe work and insulation.
4
Check all electrical connections.
5
Check and record the operation voltage.
Engineer name
Site number
Model number
Serial number
Frequency
Notes
Frequency
Notes
Frequency
Notes
Frequency
Notes
Serial number
Frequency
Notes
* Checks should be carried out once a year.
Note:
Within the first couple of months of installation, remove and clean the strainer. This is especially important when installing on an existing system.
39
EC DECLARATION OF CONFORMITY
EG-KONFORMITÄTSERKLÄRUNG
DÉCLARATION DE CONFORMITÉ CE
EG-CONFORMITEITSVERKLARING
DECLARACIÓN DE CONFORMIDAD CE
DICHIARAZIONE DI CONFORMITÀ CE
DECLARAÇÃO DE CONFORMIDADE CE
EU-OVERENSSTEMMELSESERKLÆRING
EG-DEKLARATION OM ÖVERENSSTÄMMELSE
CE-ERKLÆRING OM SAMSVAR
CE-VAATIMUSTENMUKAISUUSVAKUUTUS
MITSUBISHI ELECTRIC AIR CONDITIONING SYSTEMS EUROPE LTD.
NETTLEHILL ROAD, HOUSTOUN INDUSTRIAL ESTATE, LIVINGSTON, EH54 5EQ, SCOTLAND, UNITED KINGDOM
Akio FUKUSHIMA
President
hereby declares under its sole responsibility that the heating/cooling system components described below for use in residential, commercial and light-industrial environments:
erklärt hiermit auf seine alleinige Verantwortung, dass die unten beschriebenen Zubehörteile für das Heizungs- / Kühlungs-System zur Benutzung im häuslichen, kommerziellen und
leicht-industriellen Umfeld:
déclare par la présente et sous son entière responsabilité que les composants du système de chauffage/refroidissement décrits ci-dessous pour l’utilisation dans des environnements
résidentiels, commerciaux et d’industrie légère :
verklaart hierbij als enige verantwoordelijke dat de componenten van het verwarmings-/koelsysteem die hieronder worden beschreven, bedoeld zijn voor gebruik in woonomgevingen
en in commerciële en licht industriële omgevingen:
declara por la presente bajo su responsabilidad exclusiva que los componentes del sistema de calefacción/refrigeración descritos a continuación para su uso en zonas residenciales,
comerciales y para la industria ligera:
con la presente dichiara, sotto la sua esclusiva responsabilità, che i componenti dell’impianto di riscaldamento/raffreddamento descritto di seguito, destinato all’uso in ambienti
residenziali, commerciali e industriali:
através da presente declara sob sua única responsabilidade que os componentes do sistema de aquecimento/arrefecimento abaixo descritos para uso residencial, comercial e de indústria ligeira:
erklærer hermed under eneansvar, at de herunder beskrevne komponenter til opvarmning/køling til brug i privat boligbyggeri, erhvervsområder og inden for let industri:
intygar härmed att uppvärmnings/nedkylningssystemkomponenterna som beskrivs nedan är för användning i bostäder, kommersiella miljöer och lätt industri:
erklærer hermed som sitt ansvar, ene og alene, at komponentene i varme- og kjølesystemet som beskrives nedenfor og som er beregnet for bruk i bolig-, forretnings- og lettindustrimiljøer:
vakuuttaa täten asiasta yksin vastuussa, että alla kuvatut lämmitys/jäähdytysjärjestelmän osat, jotka on tarkoitettu käytettäviksi asuin-, toimisto- ja kevyen teollisuuden ympäristöissä:
MITSUBISHI ELECTRIC, EHST20C-VM6HA, EHST20C-YM9HA, EHST20C-VM6A, EHST20C-YM9A, EHST20C-VM6SA,
EHPT20X-VM2HA, EHPT20X-VM6HA, EHPT20X-YM9HA, EHPT20X-VM6A, EHPT20X-YM9A,
ERPT20X-VM6SA
Note: Its serial number is on the nameplate of the product.
Hinweis: Die Seriennummer befindet sich auf dem Kennschild des Produkts.
Remarque : Le numéro de série de l’appareil se trouve sur la plaque du produit.
Opmerking: het serienummer staat op het naamplaatje van het product.
Nota: El número de serie se encuentra en la placa que contiene el nombre del producto.
Nota: il numero di serie si trova sulla targhetta del prodotto.
Directives
Richtlinien
Directives
Richtlijnen
Directivas
Direttive
Nota: o número de série encontra-se na placa que contém o nome do produto.
Bemærk: Serienummeret står på produktets fabriksskilt.
Obs: Serienumret finns på produktens namnplåt.
Merk: Serienummeret befinner seg på navneplaten til produktet.
Huomautus: Sen sarjanumero on tuotteen nimikilvessä.
Directivas
Direktiver
Direktiv
Direktiver
Direktiivit
2006/95/EC: Low Voltage
2006/42/EC: Machinery
2004/108/EC: Electromagnetic Compatibility
Our authorized representative in EU, who is authorized to compile the technical file, is as follows.
Unser autorisierter Vertreter in der EU, der ermächtigt ist die technischen Daten zu kompilieren, ist
wie folgt.
Notre représentant agréée dans L’UE, qui est autorisé à compiler le fichier technique, est le suivant.
Onze geautoriseerde vertegenwoordiger in de EU, die gemachtigd is het technische bestand te
compileren, is als volgt.
Nuestro representante autorizado en la UE, que está autorizado para compilar el archivo técnico, es
el siguiente.
Il nostro rivenditore autorizzato nell’UE, responsabile della stesura della scheda tecnica, è il seguente.
MITSUBISHI ELECTRIC EUROPE, B.V.
HARMAN HOUSE, 1 GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K.
Masami KUSANO
Product Marketing Director
O nosso representante autorizado na UE, que está autorizado para compilar o ficheiro técnico, é o
seguinte:
Vores autoriserede repræsentant i EU, som er autoriseret til udarbejdelse af den tekniske fil, er
følgende.
Vår EG-representant som är auktoriserad att sammanställa den tekniska filen är följande.
Vår autoriserte EU-representant, som har autorisasjon til å utarbeide denne tekniske filen, er som følger.
Valtuutettu edustajamme EU:ssa, jolla on lupa laatia tekninen tiedosto, on seuraava.
This product is designed and intended for use in the residential,
commercial and light-industrial environment.
The product at hand is based on
• Low Voltage Directive 2006/95/ EC
the following EU directives:
• Electromagnetic Compatibility Directive
2004/108/EC
Installers: Please be sure to put your contact address/telephone number on
this manual before handing it to the customer.
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Authorized representative in EU: MITSUBISHI ELECTRIC EUROPE B.V.
HARMAN HOUSE, 1 GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K.
This product is made by Mitsubishi Air Conditioning System Europe Ltd.: NETTLEHILL Rd, HOUSTOUN IND ESTATE,
LIVINGSTON, EH54 5EQ, UK
BH79D188H01
Printed in UNITED KINGDOM