Mitsubishi Electric PUHZ-HW140YHA-BS Installation manual

Mitsubishi Electric
Pre-Plumbed Cylinder
With FTC-4 Control System
Installation Manual
IMPORTANT!
This manual contains
commissioning and
maintenance records
and must be left with
the equipment.
Contents
1
Introduction
Page 4
2
Key Facts
Page 5
3
Equipment Checklist
Page 6
4
Cylinder Installation Requirements
Page 7
5
Pipework Configuration
Page 8
6
Heat Pump System Overview
Page 9
7
How a Heat Pump Works
Page 10
8
Cylinder Technical Data
Page 11
9
Ecodan® Technical Data
Page 12
10
Ecodan Capacity Drop Offs
Page 13
11
Low Noise Mode
Page 14 - 15
12
Dimensional Drawings
Page 16 - 17
13
Heat Emitters
Page 18 - 19
14
Ecodan Only System Schematics
Page 20
15
Fossil Fuel Boiler and Ecodan System Schematics
Page 21
16
Controller Options
Page 22 - 23
17
Cylinder and Hydraulic Components Install Guidance
Page 24 - 25
18
Automatic Bypass
Page 26
19
Circulation Pumps
Page 27
20
Expansion Vessel
Page 28
21
Ancillary Components
Page 29
22
Discharge Arrangement
Page 30 - 31
23
Ecodan Installation
Page 32 - 36
24
Electrical Installation
Page 37 - 50
25
General Commissioning
Page 51
26
Main Controller
Page 52 - 66
27
SD Card Function
Page 67
28
Error Codes
Page 68 - 69
29
Trouble Shooting
Page 70 - 75
30
Spare Parts
Page 76
31
Fernox Protector HP-5C
Page 77
32
Annual Service Tasks
Page 78
33
Ecodan® Service Record
Page 79
34
Mains Pressure Hot Water Storage System Service Record
Page 80
35
Commissioning Checklist
Page 81
36
Air to Water Heat Pump Commissioning Checklist
Page 82
®
®
®
®
Contents
3
Introduction
1
Important Note to the installer
The Mitsubishi Electric pre-plumbed cylinder is specifically designed to be installed in conjunction with an air source
heat pump. The Mitsubishi Electric pre-plumbed cylinder is available with either an indirect single or twin coil.
Please read these instructions before commencing installation. Unvented cylinders are a controlled service as
defined in the latest edition of the building regulations and should only be fitted by a qualified installer.
The relevant regulations are: England and Wales - Building Regulation G3, Scotland - Technical Standard Section 4,
N Ireland - Building Regulation Part F.
After installation the benchmark log book and included commissioning sheets must be completed and left along
with these instructions, with the householder for future reference. To be installed in accordance to BS6700.
Any water distribution and central heating installation must comply with the relevant recommendation of the current
version of the Regulations and British Standards listed below:
• Building Regulations
• I.E.E Requirements for Electrical Installations (BS 7671)
• Water Regulations
• Manual Handling Operations Regulations
• British Standards BS 6798, BS 5449, BS 5546, BS 5540:1, BS 5440:2, CP331:3, BS 6700,
BS 7593 and BS 7671
• Health and Safety Document No. 635
Only Mitsubishi Electric Accredited Ecodan® Installers (AEI) should install the Ecodan® system.
Mitsubishi Electric’s notes must not be taken as overriding statutory obligations.
When installing unvented hot water systems section G3 of the building regulations should be adhered to.
An annual inspection would also be required to ensure safe, long term operation.
The information in this manual is provided to assist generally in the selection of equipment. The responsibility for
the selection and specification of the equipment must however, remain with the installer and any designers or
consultants concerned with the design and installation.
Please note: Mitsubishi Electric does not therefore accept any responsibility for matters of design, selection or
specification or for the effectiveness of an installation containing one of its products unless specifically requested
to do so at production stage.
All goods are sold subject to the condition of sale
Important Note: Included with the Ecodan® product is the Mitsubishi Electric homeowner guarantee registration
card. Please use this card to register within 30 days of commissioning (occupation if new build), and ensure the
homeowner benefits from Mitsubishi Electric homeowner 3 year guarantee for the Ecodan® heat pump boiler.
This needs to be completed by both the Accredited Ecodan® Installer and the current homeowner (or signatures
of developer if new build). The registration card is free post and is logged by our warranty department. In the
unlikely event of failure of the Ecodan® heat pump boiler, return of the card ensures the homeowner’s warranty
claim is hassle free. For additional supplies of the 3 year guarantee card please contact the heating department
on 01707 278666.
Please note - if you do not complete and return the registration card the product will only be under warranty of 12 months.
4
FTC-4 Installation Manual
2
Key Facts
This version of the Mitsubishi Electric pre-plumbed cylinder is the fourth generation in terms of its control systems
and the design of key mechanical components.
As you would expect there have been many technological changes based around our experience of producing
premium quality cylinders optimised to work with our Ecodan® range of air source heat pumps.
For those familiar with previous generations of our cylinders the most obvious change is the addition of a larger,
FTC-4 control centre providing greater flexibility and additional functionality when compared with the outgoing
FTC-2 versions. Some Key FTC-4 features are shown below.
Weather Compensation
2 Heating Zones
Backup Heater Control Option
Adaptive Room Compensation
Built in Immersion Control
SD Card Commissioning
Intelligent Fossil Fuel Boiler Control
Multiple Unit Control
Wi-Fi Ready
High Limit Control
FTC-2
FTC-4
✓
✓
✓
✓
✗
✗
✗
✗
✗
✗
✗
✓
✓
✓
✓
✓
✓
✓
✓
✓
The main controller replaces the room thermostat, timeclock and commissioning controller previously supplied.
In ‘Room Compensation’ mode this controller measures and records actual and target room temperature which
when combined with other sensor readings allow the system to calculate the minimum required flow temperature,
meaning the Ecodan® is heating the property in the most efficient way possible. This controller is supplied loose
and is intended to be used as the main thermostat. It should not be installed within the cylinder cupboard.
FTC-4 based systems also have the ability to control multiple Ecodan® units or to integrate fossil fuel boilers into
a single system. Further details of how to achieve these types of setup can be found later in this manual.
Precise control of any immersion heater fitted is now available directly from FTC-4 so there is no need to add
any third party relays as was the case with FTC-2 systems. Immersion heater strategy can be edited in terms
of maximum temperature, frequency, start time and duration of maximum temperature to ensure that the
pasteurisation cycle consumes the minimum amount of electricity and can be tailored for any installation.
The TH5 sensor now takes on the role of not just the control stat but also the high limit stat, in the very unlikely
event of a high temperature failure, power will be cut to the heat source and mechanical isolation will be provided
by closing of the hot water valve.
Other features such as SD card input and the potential for Wi-Fi connectivity will mean that commissioning
and fault finding on FTC-4 based systems will become quicker and easier.
FTC-4 Installation Manual
5
Equipment Checklist
3
You will receive the following components fitted to every Mitsubishi Electric Pre-plumbed Cylinder
Factory Fitted Components
FTC-4 Control Centre
Zone Valves x 3*
UPS2 25-60 Pumps x 2
Inlet Control Valve
Filling Loop
3kW Immersion Heater
TF1 Compact Filter
Auto Bypass Valve
Temperature and Pressure Relief Valve
Automatic Air Vent
Thermistor Pockets
Tundish
THW5 Dual Cylinder Thermistor
THW1 & THW2 Flow and Return Thermistors
THW3,4,5 and 6 Flow and Return Thermistors**
* 2 on HU150FTC-4ST
** not on HU150FTC-4ST
The components listed above will be supplied loose with every Ecodan®/Cylinder combination
Optional Components
Supplied Loose Components
Main Controller
Fix It Foot
Flexible Connection Pipes
PAC-SE41TS-E Wired Thermistor
Flow Setter Valve
Fernox HP-5C Antifreeze containing biocide 10 Litre
Expansion Vessel (White)
Fernox HP-5C Antifreeze containing biocide 25 Litre
Manuals
PAR-WT50R-E Wireless Remote Controller Transmitter
Warranty Card
PAR-WR51R-E Wireless Remote Controller Receiver
PAC-TH011HT-E Fossil Fuel Boiler Thermistors
PAC-TH011-E Pair of 2 Zone Sensors (2 pairs required)
6
FTC-4 Installation Manual
4
Cylinder Installation Requirements
Water Supply
The water supply should be checked to ensure the pressure and flow rate are suitable for the Mitsubishi Electric
packaged cylinder (Maximum flowrate = 50 litres/minute, Maximum pressure = 3 bar). If necessary consult the local
water company regarding the likely pressure and flow rate availability.
If measuring the water pressure note that a high static (no flow) mains pressure is no guarantee of good flow
availability. In a domestic installation 1.5 bar and 25l/m should be regarded as the minimum pressure/ flowrate.
Consideration should be given to upgrading existing ½” (15mm) cold mains pipework to a larger size, if the
recommended minimum pressure/ flowrate is not being achieved.
Siting the Cylinder
The minimum recommended cupboard floor area is 750mm x 750mm, the minimum height will be dependent on
the size of cylinder used. In all cases an extra 300mm clearance should be allowed from the top of the cylinder for
connection of the hot water draw off pipework.
Outlets above the cylinder will reduce the outlet pressure available by 0.1 bar for every 1m of height difference.
The unit should be protected from frost. Particular care is needed if siting in a garage or outbuilding. All exposed
pipework should be insulated. The cylinder must be installed vertically on a flat base capable of supporting it’s
weight when full.
Access for maintenance of the valves should be considered. The immersion heaters are 375mm long and care
should be taken that they can be withdrawn for servicing if required. The discharge pipework from the safety valves
should fall continuously and terminate safely in accordance with approved document G3 of the current building
regulations.
Solar Connections
Where available these are designed to allow the input of solar thermal to complement the Ecodan®. Dedicated
volumes of water covered by the solar thermal input are shown in the following table. The domestic Heating
Compliance Guide L1A and L1B offer advice on the sizing of solar thermal systems.
Model
HUS210FTC-4ST
Designated Solar Volume
65
Heat Pump Volume
145
Total Volume
210
HUS250FTC-4ST
90
160
250
HUS300FTC-4ST
100
200
300
FTC-4 Installation Manual
7
Pipework Configuration
5
8
FTC-4 Installation Manual
6
Heat Pump System Overview
The Ecodan® air source heat pump extracts thermal energy from the outside air and transfers this into a property in
the form of hot water as a conventional heating system does.
The system works on a hot water priority basis and the pipework configuration is that of a standard S-plan layout.
Hot water mode can be controlled either by the timeclock built into the main controller or can be started and
stopped when a certain drop in cylinder temperature is detected by THW5. It is up to the installer to choose the
setup that best suits their customer’s needs, for example if hot water usage was predictable and small then a timed
schedule would be most suitable. If however, hot water use was unpredictable and large quantities were required
then auto reheat would adapt to the requirements and there would always be plenty of hot water available.
Heating can be controlled in a number of different ways using FTC-4, there is the option for either timed or
constantly on. When running in timed mode it is possible to program setback periods throughout the course of the
day. Either the main controller, a Mitsubishi Electric wireless controller or a Mitsubishi Electric hard wired sensor can
be installed. Multiple sensors can be used on a single system with the ‘master’ sensor being rotated at set times
throughout the day. There is also an input on FTC-4 to accept third party non voltage thermostats or signals from
underfloor heating wiring centres.
In terms of how the heating water temperatures are controlled there are three options. Option 1 is traditional
weather compensation, the installer will input the correct flow temperatures at specific outdoor conditions directly
into the main controller, the FTC-4 will then follow these settings. Option 2 is to run the system at a fixed flow
temperature. This is not recommended as it is the least efficient method of providing space heating. There are
instances whereby it is a useful feature, for example when commissioning a system. Option 3 is known as room
compensation and is only available when using a Mitsubishi Electric thermostat. In this mode the FTC-4 will
calculate the optimum flow temperature.
Each of the three Ecodan® models require sufficient primary flow rate for adequate operation. Due to the large
resistances caused by the plate heat exchanger in the Ecodan®, the Mitsubishi Electric Package Cylinder has two
circulating pumps in series to produce the required flow rates. When in hot water mode only one pump will operate,
whereas due to the higher resistances of the heating circuit when the system is in heating mode both pumps will
operate. These pumps must be set to the same speed or damage to the system may occur.
A flow setter valve is supplied with each system to give an indication of the actual flow rate achieved. It should be
installed in the common flow or return pipe work to the Ecodan®.
Automatic air vents must be installed at the highest point of the primary system. The slightest amount of air in the
system can reduce efficiencies and even cause the Ecodan® to fault.
The primary loop must contain a 20 - 25% antifreeze concentration (or as recommended by the manufacturer) to
avoid possible freezing during periods when the appliance is not being operated. It is recommended that a monopropylene glycol with biocide is used such as Fernox HP-5C or Fernox HP-15C. The hardness of the mains water
(>200ppm) should be checked by the installer and if necessary an in-line scale reducer should be recommended.
To optimise running costs it is advisable to seek the cheapest possible electricity tariff. Although electricity prices
are higher than gas or oil, the efficiency of the system means that it requires less energy to supply the same heating
demands, thus producing cheaper energy bills. Compared to regular electricity bills it will look higher than usual, but
the homeowner should be aware that this bill incorporates heating that is usually achieved through gas or oil.
FTC-4 Installation Manual
9
How a Heat Pump Works
7
The heat pump essentially works in the same way as your refrigerator but in reverse. The Ecodan® is hermetically
sealed (no refrigeration piping involved) with R410A refrigerant, the cycle it completes to produce heat is known
as the vapour compression refrigeration cycle:
Step 1
The first phase begins with the refrigerant being cold and low pressure. 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.
Step 2
The refrigerant is then condensed as it passes across a plate heat exchanger. Having a cooler side to the heat
exchanger it decreases the temperature, so it changes the property of the refrigerant from a gas to a liquid.
Step 3
The refrigerant as a cold liquid still has a high pressure. For expansion to occur it passes through
an expansion valve. The pressure drops but it is still a cold liquid.
Step 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 is
being passed through this cycle; the water is heated up by the plate heat exchanger. The cooler water extracts
energy from the hotter refrigerant, i.e. the water is heated as it passes across the plate heat exchanger. This water
flows towards the heating system and hot water storage tank, where its energy is used to provide domestic hot
water and space heating.
Boiling points:
The refrigerant used within the cycle has a different boiling point to water, which boils (turns from liquid to gas) at
100°C. This is only true at atmospheric pressure. When the pressure increases so does the boiling temperature;
decrease the pressure and boiling temperature drops. Liquid turns to gas at a lower temperature. The boiling point
changes when the pressure changes. Refrigerants have different properties to water and have much lower boiling
temperatures. During the fourth stage of the cycle the outside ambient temperature even in winter is therefore hotter
than the temperature of the refrigerant and will heat it.
"
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10
FTC-4 Installation Manual
7
7
2
*
8
Cylinder Technical Data
HU150FTC-4 ST HU180FTC-4 ST HU210FTC-4 ST HU250FTC-4 ST HU300FTC-4 ST HUS210FTC-4 ST HUS250FTC-4 ST HUS300FTC-4 ST
Nominal domestic hot
water storage volume
(litres)
150
180
210
250
300
210
250
300
1281 x 550
1281 x 550
1469 x 550
1719 x 550
2032 x 550
1719 x 550
1719 x 550
2032 x 550
44.1
49.5
53.3
58.8
67.7
58.9
64.4
76.9
87.4
92.8
97.7
103.2
113
102.2
108.6
122.2
Nominal
Volume
(litres)
12
19
19
19
24
19
19
24
Charge
Pressure
(bar)
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
Mains Inlet
Pressure
Regulator
3.0 bar
3.0 bar
3.0 bar
3.0 bar
3.0 bar
3.0 bar
3.0 bar
3.0 bar
Expansion
Relief Valve
(CW)
6.0 bar
6.0 bar
6.0 bar
6.0 bar
6.0 bar
6.0 bar
6.0 bar
6.0 bar
7.0 bar & 90c
7.0 bar & 90c
7.0 bar & 90c
7.0 bar & 90c
7.0 bar & 90c
7.0 bar & 90c
7.0 bar & 90c
7.0 bar & 90c
Backup Immersion
Heater Rating
3 kW
3 kW
3 kW
3 kW
3 kW
3 kW
3 kW
3 kW
Insulation
Thickness
50mm
50mm
50mm
50mm
50mm
50mm
50mm
50mm
Ozone Depletion
Potential
0
0
0
0
0
0
0
0
Global Warming
Potential
<5
<5
<5
<5
<5
<5
<5
<5
Overall Cylinder
Dimensions
H x D / mm
Cylinder
Weight / kg
Empty
Fully Packaged
Weight / kg
Unvented
Store
Expansion
Vessel
Control / relief valve
pressure settings
P&T
Valve
Heat pump circuit
circulating pump
UPS2 25-60 130 (2no.)
DHW circuit
zone valve
22mm (1no.)
22mm (1no.)
22mm (1no.)
22mm (1no.)
22mm (1no.)
22mm (1no.)
22mm (1no.)
22mm (1no.)
CH circuit
zone valve
22mm (1no.)
22mm (2no.)
22mm (2no.)
22mm (2no.)
22mm (2no.)
22mm (2no.)
22mm (2no.)
22mm (2no.)
1.38
1.63
1.90
2.21
2.43
1.90
2.21
2.43
>65˚C
>65˚C
>65˚C
>65˚C
>65˚C
>65˚C
>65˚C
>65˚C
85 °C ± 5°C
85 °C ± 5°C
85 °C ± 5°C
85 °C ± 5°C
85 °C ± 5°C
85 °C ± 5°C
85 °C ± 5°C
85 °C ± 5°C
Standing
Losses
Control &
overheat safety
thermostat
temperature settings
Control
stat
Overheat
Stat
Wireless Room
Thermostat
OPTIONAL - PAR-WT50R-E
Wireless
Receiver
OPTIONAL - PAR-WR51R-E
Main
Controller
Main RC
FTC-4 Installation Manual
11
Ecodan® Technical Data
9
Model
Dimensions (mm)
PUHZ-W50VHA-BS
PUHZ-W85VHA(2)- BS
PUHZ-HW140VHA(2)- BS/
PUHZ-HW140YHA (2)-BS
Width
950
950
1020
Depth
330+30*
330+30*
330+30*
Height
740
943
1350
64
77
134 / 148
Weight (kg)
Airflow (m3/min)
Nominal sound level (dBA)
Low noise mode (dBA) @ 7°C
Guaranteed operating range (Outdoor)
Electrical Supply
50
55
100
45 ◊
48 ◊
53 ◊
40
42
46
- 15 ~ +35°C
- 20 ~ +35°C
- 25 ~ +35°C
220-240v, 50Hz
220-240v, 50Hz
220-240v, 50Hz / 380-415v, 50Hz
Phase
Single
Single
Single / 3 Phase
Running current (A) [Max]
5.4 [13]
10.3 [23]
14.9 [35] / 5.1 [13]
16
25
40 / 16
Fuse Rating (MCB sizes BS EN 60947-2) (A)
Heating A2/W35
Heating A7/W35
Primary Flow Rate
Capacity (kW)
5.0
8.5
14
COP
3.13
3.17
3.11
Power Input (kW)
1.6
2.68
4.52
Nominal Flow Rate (L/min)
14.3
25.8
40.1
Capacity (kW)
5.0
9.0
14.0
COP
4.1
4.18
4.25
Power Input (kW)
1.22
2.15
3.29
Nominal Flow Rate (L/min)
14.3
25.8
40.1
Maximum (L/min)
14.3
25.8
40.1
Minimum (L/min)
6.5
10
17.9
* Grille
◊ At distance of 1m from the outdoor unit
Eco label models denoted by (2) after product
Table 1.2
14kW Unit
8.5kW Unit
5kW Unit
12
FTC-4 Installation Manual
Ecodan® Capacity Drop Offs
Power (kW)
Ambient Air
Temperature
*W35
*W45
*W55
W35*
W45*
W55*
W35*
W45*
W55*
-15ºC
3.5
3.5
N/A
6.1
6.1
N/A
11
11
11
-7ºC
4.5
4.5
4.5
8
8
8
14
14
14
2ºC
5
5
5
8.5
8.5
8.5
14
14
14
7ºC
5
5
5
9
9
9
14
14
14
PUHZ-W50
PUHZ-W85
PUHZ-HW140
* Where W35 is a flow temperature of 35ºC / Where W45 is a flow temperature of 45ºC / Where W55 is a flow temperature of 55ºC
PUHZ-W50
Capacity at step 7 (kW)
6
PUHZ-W85
W45
4
W55
3
Fig 2.4
2
1
-10.00
-5.00
0.00
Ambient Temp (deg C)
5.00
10.00
10
W35
9
Capacity at step 7 (kW)
Table 2.4
W35
5
0
-15.00
8
W45
7
W55
6
5
Fig 2.5
4
3
2
1
0
-15.00
PUHZ-HW140
-10.00
-5.00
0.00
Ambient Temp (deg C)
5.00
10.00
16
W35
14
Capacity at step 7 (kW)
10
12
W45
10
W55
8
6
Fig 2.6
4
2
0
-15.00
-10.00
-5.00
0.00
Ambient Temp (deg C)
5.00
10.00
FTC-4 Installation Manual
13
Low Noise Mode
11
To activate low noise mode an optional 3 wire adaptor is required (PAC-SC36NA). This can either be wired into a
manual switch or a timed version. The level of low noise mode which will be activated (as shown in the relevant
graphs below and over the page) is determined by the combination of DIP switch settings (SW5-1 and SW5-2) on
the outdoor unit as shown below. As low noise mode reduces maximum capacity it is important that the capacity at
the low noise mode selected is sufficient to overcome the building’s calculated heat losses.
SW5 1 Max. fan step
selection
STEP 9
STEP 9
OFF
Selection of max. fan step
at the silent mode
Always
2
Max. frequency
selection
Middle Level
Low Level
OFF
Selection of compressor
frequency at the silent mode
Always
3
No Function
Do NOT use
PUHZ-W50,85VHA
OFF
-
-
4
No Function
Do NOT use
PUHZ-W50,85VHA
OFF
-
-
PUHZ W50 VHA BS Noise Curve
14
FTC-4 Installation Manual
11
Low Noise Mode
(continued)
PUHZ W85 VHA2 BS Noise Curve
PUHZ HW140 VHA2 BS Noise Curve
FTC-4 Installation Manual
15
Dimensional Drawing of a Standard Cylinder
12
A
Hot Water Outlet
B
Cold Mains Inlet
C
Balanced Outlet
D
Heat Pump Flow
E
Tundish Outlet
F
Automatic Bypass Valve
G
Heating Zone Valve 1
H
Heating Zone Valve 2
I
Heating Return
J
Heat Pump Return
Model
HU150FTC-4ST
A
1291
HU180FTC-4ST
1291
HU210FTC-4ST
1479
HU250FTC-4ST
1729
HU300FTC-4ST
2042
B
921
C
869
D
1176
937
885
1363
1311
1363
1688
*All dimensions are in millimetres
16
FTC-4 Installation Manual
E
417
F
824
G
N/A
H
407
I
66
J
136
1176
605
824
542
407
66
136
1176
1031
824
542
407
66
136
1311
1176
1043
824
542
407
66
136
1636
1176
1356
824
542
407
66
136
12
Dimensional Drawing (Solar Cylinder)
A
Hot Water Outlet
B
Cold Mains Inlet
C
Balanced Outlet
D
Heat Pump Flow
E
Tundish Outlet
F
Automatic Bypass Valve
G
Heating Zone Valve 1
H
Heating Zone Valve 2
I
Solar Connections
J
Heating Return
K
Heat Pump Return
Model
HUS210FTC-4ST
A
1729
A
1370
B
1318
C
1516
D
1031
E
1174
F
892
G
757
H
366
I
416
J
492
HUS250FTC-4ST
1729
1370
1318
1516
1043
1274
892
757
366
416
492
HUS300FTC-4ST
2042
1680
1628
1516
1356
1274
892
757
366
416
492
*All dimensions are in millimetres
FTC-4 Installation Manual
17
Heat Emitters
13
Please note that heat pumps provide lower flow temperatures to radiators than a conventional gas or oil boiler, the
best performance is achieved with lower flow temperatures. Rather than the radiators turning on/off locally as with a
fossil fuel boiler, heat pumps provide a more consistent lower flow temperature which allows for more efficiency and
greater comfort.
Sizing of Radiators
All heat emitters should be selected in order to overcome the heat losses as calculated for the area to be served by
that emitter. In the case of radiators the most important factors which contribute to specific output are the desired
room temperature and the MWT or mean water temperature (flow temperature + return temperature / 2). All radiators
sold in the UK must have their output verified in accordance with BSEN442, a difference between room temperature
and MWT of 50ºC is typically used (bT). A heat pump system will work on a bT of much less than a fossil fuel system,
in the case of a flow temperature of 47.5ºC and a return of 42.5ºC for example a MWT of 45ºC will apply.
At these conditions radiators need to be significantly larger than those used for a conventional fossil fuel based
system. All radiator manufacturers provide adjustment factors so that the correct radiator may be selected when
designing a system to operate at lower flow temperatures, an example of how to use these is given below.
Sizing Example
First the room losses must be established by undertaking a heat loss
calculation to the required standard, in this case room losses are assumed.
T
Adjustment Factor
Room losses = 1200 Watts (at -3°C outdoor and 21°C indoor)
5
0.05
10
0.123
In the case of a fossil fuel system a radiator may be selected directly from
the manufacturer’s brochure.
15
0.209
20
0.304
K2 (double panel/double convector) 450mm x 900mm, output = 1268 Watts
25
0.406
30
0.515
35
0.629
40
0.748
45
0.872
50
1
55
1.132
60
1.267
65
1.406
70
1.549
75
1.694
For a heat pump system with a MWT of 45°C and a target room temperature
of 20°C a ∆T of 25°C will apply, the adjustment table from the relevant
manufacturer should be used as below:
In this example the appropriate adjustment factor for 25°C ∆T should be
used, in this case 0.406 is selected.
To work out the corrected output for an existing radiator, multiply quoted
radiator output by adjustment factor
1268 x 0.406 = 514.8 Watts
This radiator will now produce less than half what is required to adequately
heat the room.
To work out the required output as quoted in the brochure for a new radiator running
at a lower flow temperature, divide quoted radiator output by adjustment factor.
1268 / 0.406 = 3123.1 Watts
To adequately heat the room using a MWT of 45°C a radiator that achieves an output
of at least 3123 Watts in the brochure will be required.
K2 (double panel/double convector) 600mm x 1800mm, output = 3200 Watts (at ∆T 50).
It may not be practically possible to fit a radiator this size in the desired position in which case adding an
additional radiator should be considered in order to achieve the required total output.
18
FTC-4 Installation Manual
13
Heat Emitters
(continued)
Underfloor heating
Heat pumps provide lower flow temperatures than traditional gas fired boilers, this means that the installation
conditions and heat emitters need to be managed carefully. These lower flow temperatures suit the conditions
required for under-floor heating systems and if installed and designed correctly can deliver a more comfortable,
consistent temperature whilst also increasing the efficiency. Some points to note when designing the installation are
• Room by room thermostats ensure adequate control in all rooms, interlocking of controls is essential whether
using multiple thermostats or not.
• Temperature difference across the flow and return should be less than 10ºC (5ºC for the Ecodan®).
• Use of night-set back instead of turning the system to off, reduces the desired temperatures by around
3 - 4ºC from their daytime levels if desired
• Response times from underfloor heating are much slower than radiators and therefore the property will take
longer to heat up initially, making this type of system less suitable for timed heating cycles
• Any additional radiators should be sized on the flow temperatures used for the under-floor heating, this
negates the need for mixing valves, which are detrimental to the efficiency
When specifying under-floor heating there are some important factors to be aware of, as rectifying mistakes will be
costly if not impossible.
• Bad placement of thermostats, where they are affected by external sources of heat or cold temperatures will
lead to poor temperature control.
• Under-floor heating circuits can produce high pressure losses. The pumps provided in our packaged systems
are capable of providing the necessary flow rates on averagely sized primary circuits, but with the inclusion of
under-floor circuits additional pumps may be necessary and potentially a low loss header to ensure the flow
rates remain high across the heat pump (heating and primary circuits in parallel to allow variable flow rate on
heating and constant flow rate on primary).
• The output (W/m2) of under-floor heating is affected by water temperature, flow rate, pipe diameter, spacing
between pipe centres and resistance of floor coverings. If these factors are not considered at the design
stage then the output may not be sufficient at the desired flow temperature negating the benefits of using
underfloor heating systems.
Hydraulic Separators (low loss headers)
These are used to create a neutral point in a hydraulic system and can be advantageous for achieving separated
circuits with varying characteristics.
For connection of multiple heat sources using FTC-4 control systems Mitsubishi Electric recommend the use of
such items. They can also be utilised on heating circuits if for example constant flow rates and variable flow rates
need to be achieved on a single system.
For further information and advice on the selection of hydraulic separators please contact Mitsubishi Electric
pre-sales technical on 01707 278666.
FTC-4 Installation Manual
19
Ecodan® Only System Schematic
14
20
FTC-4 Installation Manual
15
Fossil Fuel Boiler and Ecodan® System Schematics
FTC-4 control systems have the capability to intelligently control the operation of Ecodan® in conjunction with
traditional fossil fuel heat sources. Full details on how to set the system up can be found in the controller
section of the manual, the following diagram shows the pipework layout required to achieve this setup.
*1 note that in the case of fossil fuel boiler connection the factory fitted thermistors THW1 and THW2
will need to be relocated to the primary side of the low loss header as shown in the above schematic.
FTC-4 Installation Manual
21
Controller Options
16
The FTC-4 (cased) 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 for servicing purposes. This facility is accessed via password protected service menus.
To provide the best efficiency Mitsubishi Electric recommends using room compensation function. 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 controller section of this manual for instructions on how to set compensation curve, flow temp, room
compensation or thermistor input.
1-Zone Temperature Control
Control option A
Wireless receiver
(option)
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 (*1) and switch to
holiday mode without having to directly use the main controller.
Wireless remote controller
(option)
20.0°C
FTC-4
(Master)
20.0°C
If more than one wireless remote controller is used, the most recently requested
temperature setting will commonly be applied to all rooms by the central control system
regardless of which wireless remote controller was used. No hierarchy exists across
these remote controllers.
Max. 8
20.0°C
Wire the wireless receiver to FTC-4 (Master) referring to the wireless remote controller
instruction manual. Turn DIP SW1-8 to ON.%HIRUHRSHUDWLRQFRQ¿JXUHWKHZLUHOHVV
remote controller to transmit and receive data referring to the wireless remote
controller installation manual.)
Outdoor unit
Main controller
20.0°C
Room
Control option B
This option features the main controller and the Mitsubishi Electric thermistor wired to
FTC-4 (Master). The thermistor is used to monitor room temperature but can not make
any changes in control operation. Any changes to DHW (*1) must be made using the
main controller mounted on the FTC-4 (Master).
FTC-4
(Master)
Room temperature
thermistor (option)
Wire the thermistor to the TH1 connector on FTC-4 (Master).
The number of room temperature thermistors that can be connected to FTC-4 (Master) is
always one.
Outdoor unit
Main controller
Room
Control option C
This option features the main controller being removed from the FTC-4 (Master) and situated in a different room. A thermistor built in the main controller can be used for monitoring the room temperature for Auto Adaptation function whilst keeping all its features of
the main controller available.
FTC-4
(Master)
Main controller
(remote position)
The main controller and FTC-4 (Master) are connected by a 2-core, 0.3 mm², non-polar
FDEOH¿HOGVXSSO\ZLWKDPD[LPXPOHQJWKRIP
To use the sensor in the main controller the main controller should come off from the
FTC-4 (Master). Otherwise it will detect the temperature of the FTC-4 (Master) instead of
room temperature. This will affect the output of the space heating.
Outdoor unit
Room
Control option D (Flow temp. or compensation curve only)
This option features the main controller and a locally supplied thermostat wired to FTC-4
(Master). The thermostat is used to set the maximum temperature for heating room. Any
changes to DHW (*1) must be made using main controller mounted on the FTC-4
(Master).
FTC-4
(Master)
20.0°C
The thermostat is wired to IN1 in TBI.1 on FTC-4 (Master). The number of thermostats
that can be connected to FTC-4 (Master) is always one.
Room temperature
thermostat
¿HOGVXSSO\
The wireless remote controller can be also used as a thermostat.
Outdoor unit
22
FTC-4 Installation Manual
Main controller
16
Controller Options
(continued)
2-Zone Temperature Control
Control option A
This option features the main controller, the Mitsubishi Electric wireless remote
controller and a locally supplied thermostat.
The wireless remote controller is used to monitor the Zone1 room temperature and the
thermostat is used to monitor the Zone2 room temperature.
The thermostat can be also allocated to Zone1 and the wireless remote controller to
Zone2.
Wireless receiver
(option)
Wire the wireless receiver to FTC-4 (Master) referring to the wireless remote controller
instruction manual. Turn DIP6:WR21%HIRUHRSHUDWLRQFRQ¿JXUHWKHZLUHOHVV
remote controller to transmit and receive data referring to the wireless remote controller installation manual.)
The thermostat is used to set the maximum temperature for heating Zone2 room.
The thermostat is wired to IN6 on FTC-4 (Master). (If the thermostat is allocated to
Zone1, it is wired to IN1 on TBI.1.) (Refer to 4.5.)
20.0°C
FTC-4
(Master)
The wireless remote controller can be also used to make changes to the space heating
settings, boost DHW (*1) and switch to holiday mode without having to use the main
controller.
If more than one wireless remote controller is used, the last temperature setting
adjustment/demand will be applied to ALL rooms in same zone.
Wireless remote controller
(option)
Max. 8
20.0°C
Zone1
Outdoor unit
Main controller
20.0°C
Zone1: Room temp. control (Auto adaptation)
=RQH&RPSHQVDWLRQFXUYHRUÀRZWHPSFRQWURO
Room temperature
thermostat
¿HOGVXSSO\
Zone2
Control option B
This option features the main controller, the Mitsubishi Electric thermistor and a locally
supplied thermostat that are wired to FTC-4 (Master).
The thermistor is used to monitor the Zone1 room temperature and the thermostat is
used to control the Zone2 room temperature.
The thermostat can be also allocated to Zone1 and the thermistor to Zone2.
The thermistor can not make any changes in control operation. Any changes to DHW
(*1) must be made using the main controller mounted on the FTC-4 (Master).
Wire the thermistor to the TH1 connector on FTC-4 (Master).
The number of room temperature thermistors that can be connected to FTC-4 (Master) is
always one.
The thermostat is used to set the maximum temperature for heating Zone2 room.
The thermostat is wired to IN6 on FTC-4 (Master). (If the thermostat is allocated
to Zone1, wire it to IN1 on TBI.1.) (Refer to 4.5)
FTC-4
(Master)
Room temperature
thermistor (option)
Zone1
Outdoor unit
20.0°C
Main controller
Zone1: Room temp. control (Auto adaptation)
=RQH&RPSHQVDWLRQFXUYHRUÀRZWHPSFRQWURO
Room temperature
thermostat
¿HOGVXSSO\
Zone2
Control option C
This option features the main controller (with in-built thermistor) that is removed
from the FTC-4 (Master) to monitor the Zone1 room temperature and a locally supplied
thermostat to monitor the Zone2 room temperature.
The thermostat can be also allocated to Zone1 and the thermistor to Zone2.
A thermistor built into the main controller can be used for monitoring the room temperature for Auto Adaptation function whilst keeping all its features of the main controller
available.
The main controller and FTC-4 (Master) are connected by a 2-core, 0.3 mm², non-polar
FDEOH¿HOGVXSSO\ZLWKDPD[LPXPOHQJWKRIP
To use the sensor in the main controller the main controller should be detached from
the FTC-4 (Master). Otherwise it will detect the temperature of the FTC-4 (Master)
instead of room temperature. This will affect the output of the space heating.
The thermostat is used to set the maximum temperature for heating Zone2 room.
The thermostat is wired to IN6 on FTC-4 (Master). (If the thermostat is allocated
to Zone1, wire it to IN1 on TBI.1.) (Refer to 4.5.)
FTC-4
(Master)
Main controller
(remote position)
Zone1
Outdoor unit
20.0°C
Zone1: Room temp. control (Auto adaptation)
=RQH&RPSHQVDWLRQFXUYHRUÀRZWHPSFRQWURO
Room temperature
thermostat
¿HOGVXSSO\
Zone2
Control option D
This option features the locally supplied thermostats wired to FTC-4 (Master). The
thermostats are individually allocated to Zone1 and Zone2. The thermostats are
used to set each maximum temperature for heating Zone1 and Zone2 rooms.
Any changes to DHW (*1) must be made using the main controller mounted on
the FTC-4 (Master).
FTC-4
(Master)
Room temperature
thermostat
¿HOGVXSSO\
Zone1
The thermostat for Zone1 is wired to IN1 in TBI.1 on FTC-4 (Master).
The thermostat for Zone2 is wired to IN6 in TBI.1 on FTC-4 (Master).
20.0°C
Outdoor unit
Main controller
=RQH=RQH&RPSHQVDWLRQFXUYHRUÀRZWHPSFRQWURO
Room temperature
thermostat
¿HOGVXSSO\
Zone2
*1 If applicable
*2 For the options above, the sensor types can be exchanged between Zone1 and Zone2. (e.g. Wireless remote controller in Zone1 and Room temp thermostat in Zone2 can
be changed to Room temp thermostat and wireless remote controller, respectively).
Also, the wireless remote controller can be used to function as a thermostat as well, if required.
FTC-4 Installation Manual
23
Cylinder & Hydraulic Components Install Guidance
17
Cold Mains Pipework
Run the cold main through the building to the place where the cylinder is to be installed. Take care not to run the
cold pipe near hot water or heating pipe work so that the heat pick up is minimized. Identify the cold water supply
pipe and fit an isolating valve (not supplied). A 22mm BS1010 stopcock can typically be used but a 22mm quarter
turn full bore valve would be better as it does not restrict the flow as much. Do not use a “screwdriver slot” or
similar valves. Make sure the connection to the cold feed of the cylinder incorporates a drain valve. Position the inlet
control just above the Temperature & Pressure Relief Valve (TPRV) mounted on the side of the cylinder. This ensures
that the cylinder does not have to be drained down in order to service the inlet control set. Ensure that the arrow
points in the direction of the water flow. Select a suitable position for the expansion vessel. Mount it to the wall
using the bracket provided. Use the hose to connect to the inlet control group.
Balance Cold Connection
If there are to be showers, bidets or monobloc taps in the installation then a balanced cold supply is necessary.
There is a 22mm balanced connection on the inlet control group.
Hot Water Pipework
Run the first part of the hot water distribution pipework in 22mm. This can be reduced to 15mm and 10mm as
appropriate for the type of tap etc. Your aim should be to reduce the volume of the hot draw off pipework to a
practical minimum so that the time taken for the hot water is as quick as possible. Do not use monobloc mixer taps
or showers if the balanced cold connection is not utilised outlets of this type can back pressurize the unit and result
in discharge. Ensure that the top of the expansion vessel is accessible for servicing.
Primary Connections
Ensure that the manifold for the primary flow pipework is moved from its transport position, the same applies to the
circulation pump and TF1 filter, once all components are in the correct position all factory connections should be
tightened. Connect the primary pipework at the inlet side of pump one on the flow and the return just below the TF1
compact filter. The primary circuit is positively pumped. The primary circuit can be open vented or sealed with up to
a maximum pressure of 3.5 bar. If you seal the primary circuit an expansion vessel and pressure relief valve is
required. Effective thermostatic control of both the primary circuit and the cylinder is incorporated into the FTC-4
circuit board and corresponding thermistors, THW1, THW2 and THW5. The primary coil is intended for connection
of Ecodan® air source heat pumps only, the secondary coil (where included) is intended for solar thermal input.
Although it is in theory possible to use other heat sources it is important to note that uncontrolled heat sources
are not suitable.
Secondary Circulation
The Mitsubishi Electric pre-plumbed cylinder can be used with a secondary circulation pump. An appropriate WRAS
approved bronze circulator should be used in conjunction with a non-return valve to prevent backflow. On large
secondary circulation systems it may be necessary to incorporate an extra expansion vessel into the circuit to
accommodate the increased system water volume, details of how to calculate this are found later in this manual.
Efficient control of any secondary circulation pump fitted is essential, to leave the circulation pump on constantly will
cause the cylinder losses to increase dramatically and excessive hot water heat ups using the Ecodan® to occur, if
timed hot water heat ups are being used then a lack of hot water is another impact of poor secondary return pump
control. Timing the secondary return pump to run at times of peak hot water usage provides a slightly more efficient
method of controlling the secondary return pump. The most efficient way to control the secondary return pump is to
ensure that it only runs when required, i.e. when the bathroom is occupied, this can be achieved through use of
passive infra-red sensors. In any case all secondary return pipework should be heavily insulated, with an insulation
of at least the same thermal quality as that used on the primary pipework (thermal conductivity = 0.04W/m.K or less
at 0ºC). A secondary return boss is fitted as standard on 210, 250 and 300L. On smaller sizes tee in between the
cold feed pipe above the drain and the hot water draw off before the first outlet.
24
FTC-4 Installation Manual
17
Cylinder & Hydraulic Components Install Guidance
(continued)
Immersion Heaters
Only immersion heaters with a thermal high limit cut-out may be used. To help ensure this the immersion heaters
have a 2¼” BSP thread. They are rated at 3kW at 240 V and are of low noise construction. They have both a
control thermostat and a high limit cut-out. Please order the correct replacement, fitting non-approved immersions
may affect your guarantee. When fitting, ensure the ‘O’ ring is positioned correctly on the head of the immersion
heater and lubricate before fitting. Fit it by hand until almost home and then tighten gently as the ‘O’ rings will seal
easily. The electrical supply to each immersion heaters must be fused spur rated at 16A via a double pole isolating
switch to BS 3456. The cable must be at least 2.5mm² heat resistance (85°C HOFR) sheathed flex complying to BS
6141:1981. In all cases it is the responsibility of the electrician to select and certify the cabling and fuse rating of the
immersion heater circuit. Do not operate the immersion heater/s until the unit is full of water. Do not operate the
immersion heater if any sterilisation liquid is in the cylinder as this will cause premature failure. To complete the
wiring use the appropriate wiring diagrams in the electrical installation section of this manual. Ensure that if internal
control stat is fitted it is set higher than the target on the main controller.
Connecting To The Cylinder
All of the pipework connections on the cylinder are 22mm compression and supplied complete with gland nuts and
olives in the Accessory Kit box. Only connect 22mm copper tube to these connections. Cut the tube with a pipe
cutter and ensure no sharp edges or burrs protrude. Slide both the gland nut and olive onto the tube and push the
tube fully home into the connection ensuring the tube end fully bottoms on the connection recess. Smear the outer
wall of the olive with plumbing paste and tighten the gland nut in the prescribed manner. Upon filling /
commissioning ensure all connections are completely watertight.
Note: No control or isolation valve should be fitted between the expansion relief valve and the storage cylinder. The
relief valve connections should not be used for any other purpose. Check all the connections for tightness including
any factory made connections
Fernox TF1 Compact Filter
All Mitsubishi Electric pre-plumbed cylinders now have the TF1 compact filter factory fitted on the heat pump return
pipework which is common to both heating and hot water zones. This has been done following feedback from our
installers and in an effort to ensure that every cylinder and Ecodan® combination is adequately protected against
ferrous and non-ferrous material. Periodic servicing of this filter in accordance with the manufacturer’s
recommendations is strongly advised to ensure there are no restrictions to the flow rate. Full technical details on
this product can be found in the accompanying manual.
Zone Valves
All cylinders come with pre-installed Honeywell spring return two port valves, on all models above 150 litres there
are two heating valves serving separate hydraulic zones all models also come with a hot water valve.
FTC-4 Installation Manual
25
Automatic Bypass Valve
18
The Mitsubishi Electric pre-plumbed cylinder
has a spring differential automatic bypass valve
fitted as standard.
This serves two purposes; it allows for the
minimum flow rate of the Ecodan® unit to be
maintained and hence eliminates the possibility
of high pressure or temperature faults due to
insufficient flow rate. It will also ensure that in
the event of a pump overrun occurring when
the demand for heating or hot water has been
satisfied that the primary circulation pump
(heat pump flow) is able to bypass the zone
valves and hence no pump damage will occur.
The diagram to the left shows the position
which the field supplied pipework must exit the
bypass valve and join onto the space heating
return. It is important that this diagram is
adhered to; any deviation could cause the
bypass valve not to operate correctly. The
bypass should be connected to the space
heating return at least 300mm away from
the suction side of the circulation pump
where possible.
The automatic bypass valve should be set so
as to open at the minimum flow rate achieved
for the Ecodan® unit in question.
In situations where an adequate bypass has
been provided elsewhere on the system it is
important to cap the factory fitted auto bypass
valve. Installation of a suitable flow setter (0-10
L/min) on the bypass pipework may help with
commissioning. If you have any questions
about the fitting and commissioning of this
component please contact Mitsubishi Electric
Presales Technical Support on 01707 278666
26
FTC-4 Installation Manual
300mm
As the valve works on differential pressure and
two circulation pumps are being utilised for an
adequate pressure difference to exist the
pipework routing shown ensures that on the
inlet side of the bypass valve there is greater
pressure than on the outlet side which is
connected behind the space heating
circulation pump.
19
Circulation Pumps
All Mitsubishi Electric pre-plumbed cylinders with FTC-4 control systems come with 2 ‘A rated’ Grundfos UPS2
25 - 60 circulating pumps fitted. One pump is located on the heat pump flow and the other is located on the space
heating return. In hot water mode only the pump on the heat pump flow will energise, whereas in heating mode
both pumps will energise in order to overcome the additional resistance of the heat emitter circuit and associated
pipework. This will ensure the required flow rate is maintained for each mode whilst consuming the minimum
amount of energy possible. The minimum flow rate for each Ecodan® system can be found in the design section of
this manual. If minimum flow rate cannot be achieved with the pumps on speed 3 then additional pumping capacity
may be required – please contact Mitsubishi Electric Pre Sales Technical Support (01707 278666) for further advice.
The second (space heating) circulation pump is controlled by the 2 port valve motor outputs for all 2-zone systems
as shown by the below wiring diagram.
FTC-4 Installation Manual
27
Expansion Vessel
20
Each Mitsubishi Electric pre-plumbed cylinder is supplied with a suitably sized expansion vessel (white) for the
associated volume of potable water.
Model
HU150FTC-4ST HU180FTC-4ST HU(S)210FTC-4ST HU(S)250FTC-4ST HU(S)300FTC-4ST
Expansion Vessel Size
12 Litres
19 Litres
19 Litres
19 Litres
24 Litres
In the case of a sealed primary circuit an additional expansion vessel will be required, this needs to be sized to
accommodate the expansion within the entire heat emitter circuit and associated pipework. The installer will need
to make this selection based upon the below sizing equation.
Where:
V : Necessary expansion vessel volume
ε : Water expansion co-efficient
G : Total volume of water in the system
P1 : Expansion vessel setting pressure
P2 : Max pressure during operation
Expansion Vessel Sizing
Graph above is for the following values:
ε : at 70ºC = 0.0229
P1 : 0.1MPa
* 30% safety margin is added
28
FTC-4 Installation Manual
P2 : 0.3MPa
21
Ancillary Components
Flow Setter Valve
A flow setter valve is provided with every packaged cylinder to give an indication of the water flow rate through the
primary pipework. Each model of Ecodan® has a minimum and a maximum flow rate shown in the below table, flow
rate must be within these limits for the system to operate correctly.
Model
PUHZ-W50VHA-BS
PUHZ-W85VHA(2)-BS
Minimum Flow Rate (L/m)
6.5
Maximum Flow Rate (L/m)
14.3 *
10
25.8 *
PUHZ-HW140VHA(2)-BS
17.9
40 *
PUHZ-HW140YHA(2)-BS
17.9
40 *
* To achieve good system efficiencies higher flow rates are recommended.
The flow setter valve should be fitted to either the common flow or return field installed pipework, care should be
taken to ensure that the flow setter is installed the correct way around, there is an arrow indicating the direction of
flow embossed into the main body. The flow rate can be altered using the screw adjuster on the front of the unit
however, it is always recommended that this is done as a last resort and that flow rate is adjusted on pump speed
initially. Closing the adjuster screw too much can cause unwanted noise to occur as the water accelerates through
the restriction created by closing the valve. Flow rate should always be read from the bottom section of the float, in
some instances this can be viewed more clearly by shining a torch through the viewing window.
Pipework
In order to achieve the high flow rates required for optimum efficiency appropriate pipework sizes need to be
considered. Selection of pipework will be based upon the resistance of the heating circuit including all emitters (in
most cases higher than the hot water circuit) and Ecodan® heat exchanger. Typical pipe sizes are as follows - these
need to be confirmed by the installer as they are specific to the system in question. Copper pipework should be
used where possible although plastic pipework is acceptable.
Example pipework diameter between Ecodan® and Mitsubishi Electric pre-plumbed cylinder
Model
PUHZ-W50VHA-BS
Pipework size
22mm
PUHZ-W85VHA(2)-BS
22mm/28mm
PUHZ-HW140VHA(2)-BS
28mm/35mm
PUHZ-HW140YHA(2)-BS
28mm/35mm
Anti-Vibration Equipment
Flexible hoses are supplied with the Ecodan® package and should be installed to connect the heat pump to the
system pipework .Anti-vibration mountings (i.e. Tico-pad) should be installed under the mountings of the heat pump
to prevent excessive vibration. Rubber anti-vibration fix it feet can be purchased from Mitsubishi Electric which have
the dual purpose of raising the unit from ground level (useful in snow prone locations) and reducing vibration.
FTC-4 Installation Manual
29
Discharge Arrangement
22
Position the inlet control group so that the discharge from both safety valves can be joined together via a 15mm
end feed Tee. Connect the Tundish and route the discharge pipe. The discharge pipework must be routed in
accordance with Part G3 of schedule 1 of the Building Regulations. The information that follows is not exhaustive
and if you are in doubt you should seek advice. The two safety valves will only discharge water under fault
conditions. When operating normally water will not be discharged. The tundish should be vertical, located in the
same space as the unvented hot water storage system and be fitted as close as possible to, and lower than, the
safety device, with no more than 600mm of pipe between the valve outlet and the tundish.
Any Discharge should be visible at the tundish. The tundish should be located such that any discharge is visible.
In addition, where discharges from safety devices may not be apparent, e.g. people with impaired vision or mobility,
consideration should be given to the installation of a suitable safety device to warn when discharge takes place,
e.g. electronically operated.
Note: The discharge will consist of scalding water and steam. Asphalt, roofing felt and non-metallic rainwater
goods may be damaged by such discharges.
Note: D2 pipe from tundish is now allowed to be installed in soil stacks within premises. This activity is not
recommended as discharge from T&P may continue for long periods of time. It is the installer’s responsibility
to ensure the discharge pipework can support the discharge for prolonged periods. If used follow guidance
on mechanical seal without water trap given in G3 Building Regulations. As discharge can be in excess of
90ºC discharge into plastic pipework is also not recommended
The discharge pipe (D2) from the tundish should:
A) Have a vertical section of pipe at least 300mm long, below the tundish before any elbows or bends
in the pipework.
B) Be installed with a continuous fall of at least 1 in 200 thereafter.
30
FTC-4 Installation Manual
22
Discharge Arrangement
(continued)
The discharge pipe (D2) from the tundish should be of metal or other material that has been demonstrated to be
capable of withstanding temperatures of the water discharged.
The discharge pipe (D2) should 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 9m long i.e. discharge pipes between
9m and 18m equivalent resistance length should be at least two sizes larger than the nominal outlet size of the
safety device, between 18 and 27m at least 3 sizes larger, and so on. Bends must be taken into account in
calculating the flow resistance. Refer to diagram 1, Table 1 and the worked example. An alternative approach for
sizing discharge pipes would be to follow BS6700 Specification for design installation, testing and maintenance of
services supplying water for domestic use within buildings and their curtilages.
The discharge pipe (D2) should terminate in a safe place where there is no risk to persons in the vicinity of the
discharge. Examples of acceptable discharge arrangements are:
• To a trapped gully with the end of the pipe below the fixed grating and above the water seal.
• Downward discharges at a low level; i.e. up to 100mm above external surfaces such as car parks, hard
standings, grassed areas etc. are acceptable providing that where children play or otherwise come into
contact with discharges, a wire cage or similar guard is positioned to prevent contact whilst maintaining
visibility.
• Discharges at a high level; e.g. in to metal hopper and metal down pipe with the end of the discharge pipe
clearly visible or onto a roof capable of withstanding high temperature discharges of water and 3m from any
plastic guttering systems that would collect such discharges.
• Device to warn when discharge takes place.
WORKED EXAMPLE
The example below is for a G1/2 temperature relief valve with a discharge pipe (D2) having 4 No. elbows
and length of 7m from the tundish to the point of discharge.
Maximum resistance allowed for a straight length of 22mm copper discharge pipe (D2) from a G1/2 temperature
relief valve is: 9.0m. Subtract the resistance for 4 No. 22mm elbows at 0.8m each = 3.2m. Therefore the maximum
permitted length equates to: 5.8m. 5.8m is less than the actual length of 7m therefore calculate the next largest
size. Maximum resistance allowed for a straight length of 28mm pipe (D2) from a G1/2 temperature relief valve
equates to: 14m. As the actual length is 7m, a 28mm (D2) copper pipe will be satisfactory.
Sizing of copper discharge pipe ‘D2’ for a temperature relief valve with a G1/2 outlet (as supplied)
Size of discharge
pipework
Maximum length of straight
pipe (no bends or elbows)
Deduct the figure below from the maximum length
for each bend or elbow in the discharge pipe
22mm
Up to 9m
0.8m
28mm
Up to 18m
1m
35mm
Up to 27m
1.4m
FTC-4 Installation Manual
31
Ecodan® Installation
23
Safety Precautions:WARNING:
Precautions that must be observed to prevent injuries or death.
CAUTION:
Precautions that must be observed to prevent damages to the unit. After installation, perform the test run to ensure
normal operation. Then explain to your customer the “Safety Precautions” use and maintenance of the unit based
on the information in the Operation Manual.
Indicates a part which must be grounded.
WARNING:
Carefully read the labels attached to the unit.
WARNING:
The unit must not be installed by the user. Only Accredited Ecodan® installers can install the unit. If the unit is
installed improperly, water leakage, electric shock or fire may be caused.
The unit must be installed according to the instructions in order to minimize the risk of damages by earthquakes,
typhoons or strong winds. An improperly installed unit may fall down and cause damages or injuries. The unit must
be securely installed on a structure that can sustain its weight. If the unit is mounted on an unstable structure, it
may fall down and cause damage or injury.
All electric work must be performed by a qualified electrician according to local regulations and the instructions
given in this manual. The units must be powered by dedicated power lines and the correct voltage and circuit
breakers must be used. Power lines with insufficient capacity or incorrect electrical work may results in electric
shock or fire. Only the specified cables can be used for wiring, Connections must be made securely without tension
on the terminals. If cables are connected or installed improperly, it may result in overheating or fire. Terminal block
cover panel of the outdoor unit must be firmly fixed. If the cover panel is mounted improperly, dust and moisture
may enter the unit, and it may cause electric shock or fire. Make sure to use accessories authorized by Mitsubishi
Electric and ask an installer or authorized electrician to install them. If accessories are improperly installed, it may
cause water leakage, electric shock or fire.
Do not remodel the unit. Consult an installer for repairs. If alterations or repairs are not performed correctly, it may
cause water leakage, electric shock or fire.
The user should never attempt to repair the unit or transfer it to another location. If the unit is installed improperly, it
may cause water leakage, electric shock or fire. If the air to water heat pump needs to be repaired or moved, ask
an installer or an authorized electrician.
After installation has been completed, make sure that refrigerant does not leak. If refrigerant leaks and comes into
contact with a flame, poisonous gases will be released.
Use clean water which meets water quality standards. The deterioration of water quality may result in the system
breakdown or water leakage.
Never use anything other than water as a medium. It may cause a fire or an explosion.
Do not use heated water that is produced by the heat pump directly for drinking or cooking. There is a risk to
damage your health. There is also a risk that installing the water heat exchanger may corrode if the necessary water
quality for the air to water heat pump system cannot be maintained. If you wish to use the heated or cooled water
from the heat pump for these purposes, take measures such as to isolate the second heat exchanger within the
water piping system.
BEFORE INSTALLATION CAUTION:
Do not use the unit in an unusual environment. If the heat pump is installed exposed to steam, volatile oil (including
machine oil), sulphuric gas, exposed to briny air, or covered with snow, the performance can be significantly
reduced and the internal parts can be damaged.
32
FTC-4 Installation Manual
23
Ecodan® Installation
(continued)
Do not install the unit where combustible gas accumulates around the unit, it may cause fire or explosion. The
outdoor unit produces condensation during the heating operation. Make sure to provide drainage around the
outdoor unit if such condensation is likely to cause problems such as freezing over in cold weather. When installing
the unit within the grounds of a hospital or a building where communication equipment is installed, you may need to
take measures to reduce noise and electronic interference.
When installing the outdoor unit on a rooftop or other location where the unit is exposed to strong wind, do not face
the air outlet of the unit directly into the winds. Strong wind entering the air outlet may impede the normal airflow
and it may result in a malfunction.
The following shows three examples of precautions against strong winds. Face the air outlet towards the nearest
available wall keeping about 50cm distance (fig 3.8) Install an operational air guide if the unit is installed in a location
where strong winds such as a typhoon, etc, may directly blow to the air outlet. Position the unit so that the outlet air
can blow at a right angle to the seasonal wind direction, if possible.
NECESSARY SPACE TO INSTALL
When installing a single outdoor unit. When installing multiple outdoor unit
Installation Procedure:
Be sure to install the unit on a solid, level surface to prevent rattling noises during operation. Make sure that the
length of the foundation bolt is within 30mm from the surface of the base.Secure the base of the unit firmly with 4
M10 foundation bolts in solid locations.
INSTALLING THE OUTDOOR UNIT
Do not block the vent. If the vent is blocked, operation will be hindered and the unit may breakdown. If additional
fixation of the unit is necessary, use the installation holes on the back of the unit to attach wires, etc, with self-tapping
screws (Ø5 x 15mm or less).
WARNING:
The unit must be securely installed on a structure that can sustain its weight. If the unit is mounted on an unstable
structure, it may fall down and cause damage or injuries. The unit must be installed according to the instructions in
order to minimize the risk of damage by earthquakes, typhoons, or strong winds. An improperly installed unit may
fall down and cause damage or injuries.
Drainage Piping Work:
Outdoor unit pipe connection. When drain piping is necessary, use the drain socket or the drain pan (option)
*There is no optional drain pan for the PUHZ-HW140VHA(2)/YHA(2).
Optional Parts Name
Model Name
Drain Socket
PAC-SH71DS-E
Drain pan for 50/85
PAC-SG64DP-E
C ,C 0
C ,C 3
FTC-4 Installation Manual
33
Ecodan® Installation
23
(continued)
Foundation Specification
Foundation bolt
M10 (3/8”)
Thickness of concrete
120mm
Length of bolt
70mm
Weight-bearing capacity
320kg
Water Piping Work:WATER PIPING CONNECTION:
Connect the water pipes to the outlet and inlet pipes (ISO 228/1-G1B). Inlet and outlet pipes position is shown on
install the hydraulic filter at the water intake. Maximum allowance torque at the water piping connection is 50N/m
Check if water leaks after installation. Inlet water gauge pressure must be between 0-0.3MPa. Use the inlet water of
higher than 5°C and lower than 55°C.
"&R#&5,3+ &
34
>
FTC-4 Installation Manual
23
Ecodan® Installation
(continued)
Note: The water velocity in pipes should be kept within certain limits of the material to avoid erosion, corrosion and
excessive noise generation. Be aware, and take care of velocities in small pipes, bends and similar obstructions that
can exceed the values above. E.g.) Copper : 1.5m/s
WATER QUALITY CONDITION:
The water in a system should be clean and with a pH value of 6.5-8.0
The following are the maximum values:
Calcium: 100mg/L
Chlorine: 100mg/L
Iron/Maganese: 0.5mg/L
Note: Make sure to perform the frozen prevention measure for water pipe system. (Water piping insulation, back-up
pump system, using of a certain % ethylene glycol instead of normal water). Insulate the water piping properly. The
performance can be poor if the insulation is insufficient.
WARNING
A the outlet water temperature can reach 60°C at maximum, do not touch the water piping directly with a bare hand.
Electrical Work:
OUTDOOR UNIT: Remove the service panel Wire the cables referring to the Fig 3.12 and the Fig 3.13
5
;5
/
C ,C :
FTC-4 Installation Manual
35
Ecodan® Installation
23
(continued)
Location Requirements
Minimum Requirements for location of Ecodan®. Figures stated are in mm’s, figures in brackets are for
PUHZ-HW140 VHA(2)/YHA(2) units.
"
A
) $ $. <
2
>/
$
2
$$F 2
"&R#&5,3+ &
>=&
2
?
C
1
C
C ,C0+
C ,C0
C ,C00
C ,C06
C ,C08
C ,C0:
36
FTC-4 Installation Manual
C ,C03
C ,C0,
C ,C04
C ,C09
24
Electrical Installation
Electrical Supply – FTC-4 Circuit Board
All electrical work should be carried out by a suitably qualified electrician. Failure to comply with this could lead to
electrocution, fire, or death. It will also invalidate the product warranty. All wiring should be according to national
wiring regulations.
If FTC-4 and outdoor units have separate power supplies (prefered option), the following MUST be carried out:
• FTC-4 unit electrical box connector connections changed (see below diagram)
• Outdoor unit DIP switch settings changed to SW8-3 ON
• Turn on the outdoor unit before the FTC-4.
FTC-4
(MASTER)
FTC-4
(MASTER)
*If powering FTC-4 from Ecodan® via S1, it must be
stated on the FTC-4 - “Warning 2 points of isolation”
Cable Specifications – FTC-4 Circuit Board
The below table gives an indication of the cable specifications required for FTC-4 connections, final specification
will always be the liability of the electrical technician and must be in accordance with national wiring regulations.
Cable Specifications
FTC-4 power supply
230V 50Hz
16A
FTC-4 input capacity breaker *
1
Number of Cores x Size (mm2)
Circuit Rating
FTC-4 power supply
2 x min 1.5
FTC-4 power supply (earth)
1 x min 1.5
FTC-4 – outdoor unit *2
2 x min 0.3
FTC-4 master L – N *
AC230V
FTC-4 – outdoor unit (S2 – S3) *3
DC24V
3
*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.
FTC-4 Installation Manual
37
Electrical Installation
24
(continued)
• Wiring size must comply with the applicable local and national codes.
• FTC-4 unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible
cord. (Design 60245 IEC 57) FTC-4 (Master) unit power supply cords shall not be lighter than
polychloroprene sheathed flexible cord. (Design 60227 IEC 53).
• Install an earth longer than other cables.
• Please keep enough output capacity of power supply for each individual heater.
Insufficient power supply capacity might cause chattering.
Cable Routing
•
•
•
•
Do not run the low voltage cables through a slot that the high voltage cables go through.
Do not run other cables through a slot that the wireless receiver’s cable goes through.
Do not bundle power cables together with other cables.
Bundle cables as figure above by using clamps.
1. High voltage cables (OUTPUT)
2. Low voltage cables (INPUT)
3. Wireless receiver’s cable
4. Thermistor cables
5. Power cables
38
FTC-4 Installation Manual
24
Electrical Installation
(continued)
Electrical Supply – Ecodan® (Outdoor Unit)
A mains supply rated to suit the capacity of the Ecodan® is required, this must have a means of isolation within 1
metre of the appliance itself (IP rated lockable rotary isolator). The circuit and heat pump should be protected by a
30mA rated RCD. This appliance MUST BE EARTHED.
All external wiring to the appliance must be in accordance with the latest I.E.E. Wiring Regulation, and any local
regulations which may apply.
The appliance shall be supplied from a suitably rated double pole isolator with a contact separation of at least 3mm
in both poles.
In the event of an electrical fault after installation of the appliance, electrical checks must be carried out i.e. Earth
Continuity, Short Circuit, Polarity, and Resistance to Earth. The heat pump MUST BE DISCONNECTED BEFORE
these tests are carried out.
The 2 core interconnecting cable between the FTC-4 and Ecodan® (S2 and S3) does not carry 240V potential
Care should be taken not to run communication cables (flow sensor, remote controller cable) close to or with mains
240 volt cables.
FTC-4 (MASTER)
FTC-4 Installation Manual
39
Electrical Installation
24
A.
B.
C.
D.
E.
(continued)
Earth terminal
Terminal block
Clamp
Service panel
Wire the cables so
that they do not contact
the centre of the service
panel
Outdoor Model Number
PUHZW50VHA-BS
PUHZW85VHA(2)-BS
Outdoor unit power supply
~/N (single),
~/N (single),
~/N (single),
3N (3 phase),
50Hz, 230V
50Hz, 230V
50Hz, 230V
50Hz, 415V
16 A
32 A
40 A
16 A
3 x Min. 2.5
3 x Min. 4
3 x Min. 6
5 x Min. 2.5
2 x 1.5
2 x 1.5
2 x 1.5
3 x 1.5
Outdoor unit Circuit Breaker Capacity
Wiring Wire
No. x size
(mm²)
*1
Outdoor unit power supply
including earth
Interface unit/flow temp.
*2
controller– outdoor unit
(polar)
(polar)
(polar)
(polar)
Remote controller-Interface
2 x 0.3
2 x 0.3
2 x 0.3
2 x 0.3
unit/ Flow temp. controller
Circuit
Rating
PUHZPUHZHW140VHA(2)-BS HW140YHA(2)-BS
Outdoor unit L-N (single)
(non-polar)
(non-polar)
(non-polar)
(non-polar)
*3
AC 230 V
AC 230 V
AC 230 V
AC 415 V
*3
DC 24 V
DC 24 V
DC 24 V
DC 24 V
*3
DC 12 V
DC 12 V
DC 12 V
DC 12 V
Outdoor unit L1-N, L2-N,
L3-N (3 phase)
Interface unit/Flow temp.
controller-outdoor unit
S2-S3
Remote controller-Interface
unit/Flow temp.
controller
40
*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.
FTC-4 Installation Manual
24
Electrical Installation
(continued)
Main Controller
The main controller is supplied loose with each cylinder package; it acts as both the commissioning tool and end
user interface (timeclock and thermostat). If the main controller is to be utilised as a thermostat then it is essential
that it is correctly located, this may require the cable to be extended, and it must not be left in the cylinder
cupboard. Only when the main controller is not to be utilised as a thermostat may it be installed in the cylinder
cupboard. When placing as a thermostat choose a suitable location that is not likely to be influenced by heat
sources or cold spots (i.e. near radiator/window)
Connect the main controller cable to 11 and 12 on the terminal block (TBI. 2) on the FTC-4 (Master) controller.
When wiring to TBI.2, use ring or fork type terminals .The 10m controller cable is supplied loose. This can be
extended to a maximum of 500 m using the same specification of cable.
The main controller can be installed either in the switch box or directly on the wall. Regardless of whether installing
the main controller either directly on the wall or in the switch box the following clearances should be achieved.
FTC-4 Installation Manual
41
Electrical Installation
24
1.
(continued)
Removing the front cover
Once the front and back covers are separated the back cover can be positioned and holes for the cable and
securing of the back cover/switch box can be drilled
2.
Connecting cable to the back cover
Connect the main controller cable to the terminal block on the back cover and thread the cable from behind the back
cover to the FTC-4 circuit board. Seal the gap between the cable and the hole through which the cable is threaded.
42
FTC-4 Installation Manual
24
Electrical Installation
3.
(continued)
Install switch box/ back cover
Install the back cover either directly to the wall or using a switch box as shown in the examples below
4.
Join the front and back cover
The cable connector should now be connected to the front cover jack and the front and back covers joined
together using the securing tabs.
FTC-4 Installation Manual
43
Electrical Installation
24
Function
OFF
ON
Default
Single
Zone
Default
Two
Zone
SW1-1
Boiler
WITHOUT Boiler
WITH Boiler
OFF
OFF
SW1-2
Maximum HP water temperature
55ºC
60ºC
ON
ON
SW1-3
DHW tank
WITHOUT DHW tank
WITH DHW tank
ON
ON
SW1-4
Immersion heater
WITHOUT Immersion
heater
WITH Immersion
heater
ON
ON
SW1-5
Booster heater
WITHOUT Boost
heater
WITH Boost
heater
OFF
OFF
SW1-6
Booster heater function
For heating only
For heating and DHW
ON
ON
DIP Switch
SW1
SW2
SW3
SW4
44
(continued)
SW1-7
Outdoor unit type
Split type
Packaged type
ON
ON
SW1-8
Wireless controller
WITHOUT Wireless
controller
WITH Wireless
controller
OFF
OFF
SW2-1
Room thermostat 1 (IN1)
logic change
Zone 1 operation stop Zone 1 operation stop OFF
at thermostat close
at thermostat open
OFF
SW2-2
Flow switch 1 (IN2) logic change
Failure detection
at close
SW2-3
SW2-4
Failure detection
at open
OFF
OFF
Booster heater capacity restriction Inactive
Active
OFF
OFF
Cooling mode function
Inactive
Active
OFF
OFF
SW2-5
Automatic switch to backup
heat source (O/U error)
Inactive
Active *
OFF
OFF
SW2-6
Mixing tank (2 zone)
WITHOUT Mixing
WITH Mixing
OFF
ON*4
SW2-7
2 zone control
Inactive
Active
OFF
ON*4
SW2-8
-
-
-
OFF
OFF
SW3-1
Room thermostat 2 input (IN6)
logic change
Zone 2 operation stop Zone 2 operation stop OFF
at thermostat close
at thermostat open
OFF
SW3-2
Flow switch 2 (IN3) logic change
Failure detection
at close
Failure detection
at open
OFF
OFF
SW3-3
Flow switch 3 (IN7) logic change
Failure detection
at close
Failure detection
at open
OFF
OFF
SW3-4
Cooling operation in zone 2
Not in use
In use
OFF
OFF
SW3-5
Heating mode function
Inactive
Active
OFF
OFF
SW3-6
-
-
-
OFF
OFF
SW3-7
-
-
-
OFF
OFF
SW3-8
-
-
-
OFF
OFF
SW4-1
Multiple outdoor unit control
Inactive
Active
OFF
OFF
SW4-2
Position of multiple outdoor
unit control *2
Slave
Master
OFF
OFF
SW4-3
-
-
-
OFF
OFF
SW4-4
-
-
-
OFF
OFF
SW4-5
Emergency mode
(heater only operation)
Normal
Emergency mode
(activated)
OFF*3
OFF*3
SW4-6
Emergency mode
(boiler operation)
Normal
Emergency mode
(activated)
OFF*3
OFF*3
FTC-4 Installation Manual
1
24
Electrical Installation
(continued)
DIP Switch Settings - FTC-4
Located on the FTC-4 printed circuit board are 4 sets of small white switches known as DIP switches. The DIP
switch number is printed on the circuit board next to the relevant switches. The word ON is printed on the circuit
board and on the DIP switch block itself. To move the switch you will need to use a pin or the corner of a small flat
headed electrical screwdriver or similar.
DIP switch settings are listed below. Make sure to turn off both indoor unit and outdoor unit power supplies before
changing the switch settings.
For multiple outdoor units control with FTC-4 (Slave), see separate manual supplied with the FTC-4 (Slave) circuit board.
Notes
*1.
OUT11 will be available. For safety reasons, this function is not available for certain errors. (In that case,
system operation must be stopped and only the water circulation pump keeps running.)
*2.
SW4-2 is available only when SW4-1 is ON.
*3.
If emergency mode is no longer required, return the switch to OFF position.
*4.
All pre-plumbed cylinders except for the 150 litre model come with DIP switches pre-set for 2 zone
function, in the case that only one zone is to be utilised you MUST turn OFF SW 2-6 and SW 2-7.
FTC-4 Installation Manual
45
Electrical Installation
24
(continued)
FTC-4 Terminals
N
L
FTC-4 (MASTER)
46
FTC-4 Installation Manual
24
Electrical Installation
(continued)
Signal Inputs
Name
Terminal
TBI.1 1-2
Room thermostat 1 input
IN2
TBI.1 3-4
Flow switch 1 input
IN3
TBI.1 5-6
Flow switch 2 input (Zone 1)
Refer to SW3-2
Refer to SW3-2
IN4
TBI.1 7-8
Demand control input
Normal
Heat source OFF/Boiler
operation *2
IN5
TBI.1 9-10
Outdoor thermostat input (*1)
Standard operation
Heater operation/Boiler
operation *2
IN6
TBI.1 11-12
Room thermostat 2 input
Refer to SW3-1
Refer to SW3-1
IN7
TBI.1 13-14
Flow switch 3 input (Zone 2)
Refer to SW3-3
Refer to SW3-3
IN1
*1.
*2.
Function
OFF (Open)
ON (Short)
Refer to SW2-2
Refer to SW2-2
Refer to SW2-1
Refer to SW2-1
If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts
may be reduced.
To turn on the boiler operation, use the main controller to select ‘Boiler’ in ‘External input setting’ screen in
the service menu.
Wiring Specification for Signal Inputs
Name
ON (Short)
Signal input wire
Use sheathed vinyl coated cable
Maximum 10m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5mm2 to 1.25mm2
Non voltage ‘a’ contact signals
Remote switch: Minimum applicable load 12V DC, 1mA
Switch (or Thermostat)
Thermistor Inputs
Name
Terminal
-
CN20
Connector
Item
TH2
-
CN21
Thermistor (Ref liquid temp) *
THW1
-
CNW12 1-2
Thermistor (Flow water temp)
-
TH1
Optional Part
Thermistor (Room temp) *1
PAC-SE41TS-E
-
2
THW2
-
CNW12 3-4
Thermistor (Return water temp)
THW5
-
CNW5
Thermistor (DHW tank water temp) *1
THW6
TBI.2 7-8
-
Thermistor (Zone1 flow water temp) *
THW7
TBI.2 9-10
-
Thermistor (Zone1 return water temp)*1
THW8
TBI.2 1-2
-
Thermistor (Zone2 flow water temp) *1
THW9
TBI.2 11-12
-
Thermistor (Zone2 return water temp)*
-
Thermistor (Boiler flow water temp)*1
THWB1 TBI.2 3-4
PAC-TH011TK-E
PAC-TH011-E
1
PAC-TH011-E
1
PAC-TH011HT-E
Do not splice the wiring to extend or shorten it as this could affect correct monitoring of each temperature. If the
wiring is too long, bundle it with a strap to adjust the length. When the wires are wired to adjacent terminals, use
ring terminals and insulate the wires.
*1. The maximum length of the thermistor wiring is 5m.
*2. Except PAC-IF052B
FTC-4 Installation Manual
47
Electrical Installation
24
(continued)
Signal Inputs
Name
Terminal
Connector Function
OFF
ON
Signal/Max
Current
OUT1
TBO.1 3-4
-
Pump 1 (CH & DHW)
OFF
ON
230V AC 1A Max
OUT2
TBO.1 5-6
-
Pump 2 (CH zone 1)
OFF
ON
230V AC 1A Max
OUT3
TBO.1 7-8
-
Pump 3 (CH zone 2)
OFF
ON
230V AC 1A Max
OUT4
TBO.1 9-11
-
2 way valve 1
Heating
DHW
230V AC 0.1A Max
OUT5
Max
Total
Current
3 A (a)
3 A (b)
TBO.1 12-13
-
Mixing valve
Stop
Close
230V AC 0.1A Max
TBO.1 13-14
-
Mixing valve
Stop
Open
230V AC 0.1A Max
OUT6
TBO.3 1-2
-
Boost heater 1
OFF
ON
230V AC 0.5A Max
(relay)
OUT7
TBO.3 3-4
-
Boost heater 2
OFF
ON
230V AC 0.5A Max
(relay)
OUT8
TBO.2 11-12
-
Boost heater 2+
OFF
ON
230V AC 0.5A Max
(relay)
OUT9
TBO.2 9-10
CNIH
Immersion heater
OUT11
TBO.2 1-2
-
Error output
Normal
Error
230V AC 0.5A Max
(relay)
OUT12
TBO.2 3-4
-
Defrost output
Normal
Defrost
230V AC 0.5A Max
(relay)
OUT13
TBO.2 7-8
-
2 way valve 2
DHW
Heating
230V AC 0.1A Max
BC
TBO.3 5-6
-
Boost heater
protection
OFF
(BHT
open)
ON
(BHT
closed)
230V AC
0.5A Max
(relay)
OUT10
TBO.1 1-2
-
Boiler output
OFF
ON
Non voltage contact
*220-240V AC (30V
DC) 0.5A or less
*10mA 5V DC or
more
-
BHT
TBO.2 13-14
CNBHT
Thermostat for boost
heater
Thermostat Normal:
open
-
short/ High temp:
-
230V AC 0.5A Max
(relay)
Notes
1. Do not connect multiple water circulation pumps directly to each output (OUT1, OUT2, and OUT3). In such
a case, connect them via (a) relay(s).
2. Connect an appropriate surge absorber to OUT10 (TBO.1 1-2) depending on the load at site.
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FTC-4 Installation Manual
24
Electrical Installation
(continued)
Fossil Fuel Boiler Connection
As shown on the schematic for Ecodan® and fossil fuel boiler connection, it is possible to combine the two
technologies into a common system.
This setup provides the option for the FTC-4 to intelligently control and prioritise either heat source, dependant on
either an outdoor temperature, energy use, cost or CO2 emissions. Full instructions are provided with the boiler
control thermistors (PAC-TH011HT-E) which must be purchased separately and are required for this type of
installation.
Only space heating operation can be supplemented by the boiler; hot water mode is not possible directly from the
FTC-4. When installing a boiler and Ecodan® in conjunction with a Mitsubishi Electric pre-plumbed cylinder, the
position of the low loss header means that both heat sources will be common to both DHW and space heating.
However, please note the boiler will only operate in space heating mode. Please refer to the schematic earlier in
this manual for clarification.
As boiler operation commences, pump overrun will occur meaning that all circulators will be energised. This
continues for a time dictated by the settings entered under ‘economy setting for pump’. As detailed in the ‘main
controller operation’ section this should always be set to 3 minutes with this option turned on via the tick box.
It is assumed the boiler will have its own dedicated circulation pump which is interlocked with the boiler not the
FTC-4. Once the pump overrun period has ended, the main circulation pump on the cylinder (OUT1) and the
dedicated Ecodan® circulation pump (OUT1 with relay protection) will de-energise meaning that the space heating
circulator and the boiler circulator are providing flowrate on each side of the low loss header.
The boiler control output (OUT10) has no voltage across it, unlike the other 240V outputs. It MUST be decided
prior to installation if the boiler in question can be controlled by this method or if a control voltage (AC/DC) is
required when boiler operation is ON.
For more details, refer to the installation manual of PAC-TH011HT-E.
Installation & System set up
1.
Set Dip-SW 1-1 to ON "With boiler" and SW2-6 to ON “With Mixing tank”.
2.
Install the thermistors THWB1 (Flow temp.) and THWB2 (return temp.) *1 on the boiler circuit.
3.
Connect the output wire (OUT10: Boiler operation) to the signal input (room thermostat input)
on the boiler. *2
Remote controller settings
1.
Go to Service menu > Heat source setting and choose “Boiler” or “Hybrid”. *3
2.
Go to Service menu > Operation settings > Boiler settings to make detailed settings for “Hybrid” above .
*1 The boiler temp. thermistor is an accessory.
*2 OUT10 has no voltage across it.
*3 The “Hybrid” automatically switches heat sources between heat pump and boiler.
FTC-4 Installation Manual
49
Electrical Installation
24
(continued)
2 Zone Control
The FTC-4 factory manual uses a different method of 2 zone control to that commonly seen in the UK.
A low loss header or mixing tank is used to separate the hot water zone and the heat pump from the two
space heating zones; no zone valves are used on the output side of the header. Instead additional circulation
pumps are employed, one on each zone. There is also the option for different flow temperatures on each zone.
An example of this arrangement is shown below:
This setup cannot be integrated onto a pre-plumbed cylinder without drastically increasing physical size and costs.
Therefore the hydraulic and electrical configuration on the Mitsubishi Electric pre-plumbed cylinder has been tailored
to suit common UK 2 zone applications with a motorised valve controlling each zone directly connected to the
primary circuit.
All thermistors and valves are prewired from the factory; all that is required to activate 2 zone control is the addition
of a thermostat to control the second zone. This thermostat must be a third party item and connects to IN6, SW3-1
MUST be turned ON if IN6 is to be utilised.
Please note that the flow switches will be turned off via DIP switches as will the mixing valve control as shown in the
above diagram.
All pre-plumbed cylinders except for the 150 litre model come with DIP switches pre-set for 2 zone function; in the
case that only one zone is to be utilised you MUST turn OFF SW2-6 and SW2-7.
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General Commissioning
Before Filling
Check and tighten all mechanical joints prior to commissioning. Cap and seal 2nd heating zone valve outlet if not in
use to avoid potential leaks on models 180 and above. Check all controllers are commissioned and DIP switches
are set correctly.
Filling The Cylinder
Check the pressure in the expansion vessel is 3 bar (45PSI), i.e. the same as the setting of the pressure reducing
valve. The valve is of the car tyre (Schrader) type. Check all the connections for tightness including any factory made
connections such as the immersion heater and the temperature and pressure relief valve. Before filling open the hot
tap furthest away from the Mitsubishi Electric pre-plumbed cylinder to let air out. Open the cold main isolation valve
and allow the unit to fill. When water flows from the tap allow it to run for a short while to flush through any dirt,
swarf or flux residue. Close the tap and open every other hot tap in turn to purge all remaining air. Check the
cylinder target temperature programmed on the main controller is set to 55ºC.
Filling The Primary Circuit
Ensure the lever on the two port valve(s) is set to the filling position. When full, move the lever back to the auto
position. Switch the main controller to Domestic Hot Water (DHW) mode and allow the cylinder to start to heat,
ensure a complete cylinder heat up is observed and that switchover to heating mode is then tested.
Safety Valve Checks
During heat-up there should have been no sign of water coming from either the expansion relief valve or the
temperature / pressure relief valve. Now hold both of these safety valves fully open allowing as much water as
possible to flow through the tundish. Check that your discharge pipework is free from debris and is carrying the
water away to waste efficiently. Release the valves and check that they reseat properly.
Emitter Circuit
Check Primary flow rate is acceptable for the Ecodan® model in question with all zones/circuits open; confirm that
all valves are fully open and that strainers are clear before adjusting pump speed and hence primary flow rate. It
may be necessary to run the system in fixed flow temperature mode during this period to ensure that temperatures
requested can be achieved and maintained.
With radiator systems start to adjust lockshields so that all radiators are balanced and reaching an even
temperature, usually the first radiators on the circuit will become hotter fastest and need their flow rate restricting,
the opposite applies to those radiators further away from the heat source. When commissioning underfloor heating
circuits the balancing is carried out by adjusting the flow rate for each zone at the relevant manifold, the designer
will have specified a required flow rate for each zone which must be adhered to.
Antifreeze
Must be added to the required concentration (20-25%) and must have biocide protection. Mitsubishi Electric can
supply this item in 10 and 25 litre containers (SAP 246670 and SAP 246671).
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51
Main Controller
26
Main Controller Operation and Commissioning
It is advised that main controller settings are programmed for the specific installation to ensure the system can
operate to its full efficiency and the end user’s requirements are met. Some key points when setting up the main
controller for the first time are described in this section:
*1 when the system is switched off or the power supply is
disconnected, the water circuit protection functions (e.g. freeze
stat. function) will NOT operate. This will not cause an issue for
UK installations as the system will be treated with antifreeze.
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Main Controller
(continued)
Setting the Main Controller
After the power and communication have been connected to the Ecodan® and Mitsubishi Electric pre-plumbed
cylinder the initial system settings can be entered via the main controller.
1. Check all breakers and other safety devices are correctly installed and turn on power to the system.
2. When the main controller switched on for the first time, the screen automatically goes to Initial settings
menu, Language setting screen and Date/Time setting screen in order.
3. Main controller will automatically start up. Wait approximately 6 minutes whilst the control menus load.
4. When the controller is ready a blank screen with a line running across the top will be displayed.
5. Press button E (Power) to turn on the system. Before turning on the system, perform initial settings as
instructed below.
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 seconds the
main settings will be displayed with all functionality
available. The arrows shown at the bottom of the display
screen will invert colours and additional edit menus will be
displayed.
The following items can be viewed and/or edited
(dependent on access level).
• Domestic Hot Water (DHW)
• Heating/Cooling
• Schedule timer
• Holiday mode
• Initial settings
• Service (Password protected)
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.
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Main Controller
26
(continued)
Initial Settings
From the Initial settings menu the installer can set the following:
• Date/Time
• Language
• ºC/ºF
• Temp. display
• Contact number
• Time display
• Room sensor settings
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.
Room temperature sensor
Please ensure that when using room control mode this sensor is set
to represent whichever Mitsubishi Electric room sensor is to be used,
i.e. ‘Main RC’ if the main controller is to be used, ‘TH1’ for fixed wall
mounted sensor or ‘Room RC1’ if the first wireless controller is to be
used. Time/Zone control is a function which allows up to eight room
sensors to operate on a single hydraulic circuit/zone rotating which
has priority at different times during the day, to activate this function
please go to the following screen.
1. Go to ‘room sensor settings’ sub menu.
2. When 2-zone temperature control is active or wireless
remote controllers are available, from Room RC
zone select screen, select zone no. to assign to each
remote controller.
3. From Sensor setting screen, select a room sensor to be
used for monitoring the room temperature from Zone 1
and Zone 2 separately.
4. From Sensor setting screen, select Time/Zone to make it
possible to use different room sensors according to the
time schedule set in the Select Time/Zone menu. The
room sensors can be switched up to 4 times within
24 hours.
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26
Main Controller
(continued)
Hot Water And Heating Modes
Many options are available to suit the requirements of the end user, separate end user manuals and online
homeowner portals are available and it is part of the AEI terms and conditions that a thorough handover to the end
user is carried out. Hot water mode can be set to timed or auto reheat, the latter is more suitable for unpredictable
hot water usage patterns. When running the heating in timed mode setback periods can be entered throughout the
day, for example during unoccupied hours, for a heat pump system this is recommended as oppose to turning the
system off entirely. Setback temperatures in heating mode should not be less than 4ºC of the highest target
temperature.
Domestic Hot Water (DHW)/Legionella Prevention
The domestic hot water and legionella prevention menus control the operation of DHW tank heat ups. To set the
domestic hot water parameters first ensure the system is in installer mode so that the edit function appears.
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.
Explanation of DHW operation
•
When the DHW tank temperature drops from “DHW max. temp” by more than the “DHW max.
temperature drop” (set by installer), DHW mode operates and the flow from the primary heating circuit
is diverted to heat the water in the DHW 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 primary hot water is not directed to the space heating circuit.
•
Directly after DHW max. operation time ‘DHW mode restriction’ will routinely operate. The duration of
this feature is set by the installer and during its operation DHW mode cannot (normally) be reactivated,
allowing time for the system to deliver primary hot water to the space heating if required. However, if at
this time there is no current demand for space heating, the system will automatically resume DHW
mode. This will continue until it receives a demand for space heating.
•
After the ‘DHW mode restriction’ operation the DHW mode can operate again and DHW tank heating
will continue according to system demand.
DHW mode can run in either ‘Normal’ or ‘Eco’ mode. Normal mode will heat the water in the DHW tank more
quickly using the full power of the heat pump. Eco mode takes a little longer to heat the water in the DHW tank but
the energy used is reduced. This is because heat pump operation is restricted using signals from the
FTC-4 based on measured DHW tank temperature.
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Main Controller
26
(continued)
Legionella Prevention Mode settings (LP mode)
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.
1. Use button F3 to choose legionella mode active YES/NO.
2. Use button F4 to edit the legionella function.
3. Use F1 and F2 keys to scroll through the menu selecting
each subtitle in turn by pressing CONFIRM.
4. Enter the desired number using the function keys and
press CONFIRM.
Explanation of Legionella Prevention Mode operation
1. At the time entered by the installer ‘Start time’
flow of useful heat from the system is diverted
to heat the water in the DHW tank.
2. When the temperature of the stored water
exceeds the ‘Hot Water temp.’ set by the
installer (above 65°C) primary circuit water
is no longer diverted to heat the DHW tank.
3. Whilst LP mode is in operation hot water is
not directed to the space heating circuit.
4. 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.
5. If stored water temperature should drop to LP
restart temp, LP mode will restart and primary
water flow from the heat source(s) will be directed
to the DHW 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).
6. It is the responsibility of the installer to ensure the settings for
Legionella Prevention are compliant with local and national guidelines.
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Main Controller
(continued)
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 from routinely
switching to space heating and continue to provide DHW tank heating. Forced DHW operation is activated by pressing
button F1 and Back button in the ‘Option Screen’. After DHW operation finishes, the system will automatically return to
normal operation. To cancel forced DHW operation hold down button F1 in the ‘Option Screen’.
Heating
The heating menu deals with space heating, using either a radiator or underfloor system depending on the
installation. The system can run in one of three modes, weather compensation, room compensation or fixed flow
temperature. When using Mitsubishi Electric thermostats/sensors it is recommended that room compensation
mode is used. When using third party thermostats for example on a multi-zone underfloor heating system either
weather compensation mode or room compensation mode can be used. Weather compensation mode must be
programmed to suit the system design for the building in question. Fixed flow temperature mode is a function that
is utilised for commissioning only.
From the main settings menu
1. Use F2 and F3 buttons to highlight heating/cooling icon then press CONFIRM.
2. The heating menu will be displayed.
3. To select the sub-menus press the function button below the icon required. E.g. for mode change
of Zone1 press F1
Heating
1. Under this sub-menu the mode of heating is selected.
2. Choose between
•
Heating flow temperature
•
Heating room temperature
•
Heating compensation curve
Heating room temperature cannot be selected both in Zone1 and Zone2. To choose between the different modes
for heating, highlight the mode preferred and press select.
If the compensation curve mode is selected as the heating mode please read the following instructions over leaf.
FTC-4 Installation Manual
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Main Controller
26
(continued)
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 ambient temperature. The FTC-4 uses information from
both an outdoor ambient temperature sensor and temperature sensors on the primary circuit supply to ensure the
heat pump is not producing excessive flow temperatures if the weather conditions do not require it.
Compensation Curve Setting
1.
2.
3.
4.
5.
6.
From the heating menu select edit using the F3 function button.
The compensation curve setting screen will be displayed.
In 2-zone heating operation, press F1 to switch between Zone1 and Zone2.
Press F2 to alter the Hi parameter (when flow temp is maximum and outdoor ambient temp is minimum).
Press F3 to alter the Lo parameter (when flow temp is minimum and outdoor ambient temp is maximum).
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 ambient temperature for the compensation curve graph can be set and
altered for the 2 extremes of Hi and Lo.
1.
2.
3.
4.
5.
6.
Press F1 and F2 to change the flow temperature (y-axis of compensation curve).
Pressing F1 will raise the desired flow temperature for the set outdoor ambient temperature.
Pressing F2 will lower the desired flow temperature for the set outdoor ambient temperature.
Press F3 and F4 to change the outdoor ambient temperature (x-axis of compensation curve).
Pressing F3 will lower the outdoor ambient temperature for the set flow temperature.
Pressing F4 will raise the outdoor ambient temperature for the set flow temperature.
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.
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Main Controller
(continued)
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.
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.
•
•
•
•
•
•
•
From main menu screen press button B.
Use buttons F2 and F3 to scroll through menu until Holiday Mode is highlighted.
Press CONFIRM button.
The holiday mode status screen is displayed.
To change the flow temperature or room temperatures on heating mode press button F3.
A list of variables will be displayed. Choose the one you wish to modify using buttons F1/F2 then
press CONFIRM.
Adjust the temperature using buttons F3 and F2 and press CONFIRM button to save changes.
Schedule timer
The schedule timer mode allows daily and weekly space heating 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
• Hot Water (DHW)
3. Use F2 and F3 buttons to move between mode icons then press CONFIRM to be shown the preview
screen for each mode.
The preview screen allows you to view the current settings. In 2-zone heating operation, press F1 to switch
between Zone1 and Zone2. 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, space heating/DHW (whichever is selected) is
allowed.
FTC-4 Installation Manual
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Main Controller
26
(continued)
Setting the Schedule Timer
1. In the preview menu screen press F4 button.
(* In the case of 2-zone system, press F1 button to
switch between Zone1 and Zone2).
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
then 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, 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.
Note:
•
•
•
60
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.
FTC-4 Installation Manual
26
Main Controller
(continued)
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.
•
•
•
•
From the main setting menu use F2 and F3 to highlight the service icon then press CONFIRM.
You will be prompted to enter a password. THE FACTORY DEFAULT PASSWORD IS “0000”.
Press CONFIRM. (It takes up to 30 seconds to load the service menu.)
To reset the password hold down F3 and F4
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 settings
3. Thermistor adjustment
4. Auxiliary settings
5. Heat source setting
6. Operation settings
7. External input settings
8. Running information
9. Thermistor reading
10. Summary of settings
11. Error history
12. Password protection
13. Manual reset
14. SD card
In this Installation Manual, instructions will be given only for the following functions;
1.
2.
3.
4.
5.
6.
7.
Manual operation
Auxiliary settings
Heat source setting
Operation settings
External input settings
Password protection
SD card
Note:
Many functions cannot 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.
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Main Controller
26
(continued)
Manual Operation
During the filling of the system the water circulation pump and zone valve(s) 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 FTC-4.
•
•
•
•
From the service menu use F1 and F2 buttons to scroll through list
until manual operation is highlighted.
Press CONFIRM.
Manual operation menu screen is displayed.
To activate manual operation press the function button under the
desired component.
NOTE: Manual operation and heat source setting cannot 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.
Auxiliary Settings
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 settings then press CONFIRM.
Electric Heater (Heating)
1.
2.
3.
4.
5.
From the Auxiliary settings menu highlight Electric heater (heating).
Press CONFIRM.
The Electric heater (heating) screen is displayed.
Press F1 button to switch the function ON/OFF.
Use F3 and F4 buttons to adjust the time period of heat pump only
operation before the booster heater will assist in space heating
(5 -180mins).
Economy Settings for Pump
It is necessary for there to be some degree of pump overrun on all FTC-4
systems once the demand has been met so that various sensor readings can
be accurately stored during this period. Under the sub menu ‘economy setting
for pump’ this function should always be turned on via the tick box, simply
turning this option off will result in the pump having no economy setting and
running continuously. The delay should always be reduced to the minimum (3
minutes). Meaning that during the 3 minutes after the heating or hot water
demands have been satisfied the pump will run, making it essential that the
automatic bypass valve is installed and commissioned as previously described
in this manual.
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Main Controller
1.
2.
3.
4.
5.
(continued)
From the Auxiliary settings menu highlight Economy Settings for water circulation pump.
Press CONFIRM.
The economy settings for water circulation pump screen are displayed.
Use button F1 to switch the water circulation pump ON/OFF.
Use buttons F3 and F4 to adjust the time the water circulation pump will run. (3 - 60 mins)
Electric Heater (DHW)
1.
2.
3.
4.
5.
From the Auxiliary settings menu highlight Electric heater (DHW).
Press CONFIRM.
The Electric heater (DHW) screen is displayed.
Press F1 button to switch the function ON/OFF.
Use F3 and F4 buttons to adjust the time period of heat pump only operation before the booster
heater and the immersion heater (if present) will assist in DHW heating. (15 -30mins)
Mixing Valve Control
This function is not applicable to the Mitsubishi Electric pre-plumbed cylinder.
Pump Speed
This function is not available via the main controller, pump speed on the ‘Mitsubishi Electric pre-plumbed cylinder’
is adjusted via the speed selector on the pump body, for further details please see the circulation pump section in
this manual.
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. Electrical heaters are turned on and off separately so
in the case that all heaters are turned off ‘standard’ will refer to heat pump only operation.
1. From the service menu use F1 and F2 buttons to scroll through
list until Heat Source Setting is highlighted.
2. Press CONFIRM. Heat source setting menu screen is displayed.
3. Press F3 button until preferred heat source is displayed.
4. Press CONFIRM.
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.
Operation Settings
1. To access the Operation settings menu use F1 and F2 buttons to scroll through the service menu
until Operation settings is highlighted.
2. Press CONFIRM.
3. Operation settings menu is displayed.
Freeze Stat Function
UK Ecodan® systems must have antifreeze added; this ensures a failsafe against freezing circuits is achieved.
A split in the outdoor unit plate heat exchanger is a very expensive failure as is split pipework within the property.
The freeze stat function is a generic feature that must be turned off to avoid unnecessary power consumption.
As all UK systems must have antifreeze added this feature is redundant. Under the ‘freeze stat function’ sub menu
reduce the outdoor temperature until **ºC is displayed; this will ensure the function is turned off.
FTC-4 Installation Manual
63
Main Controller
26
(continued)
1. From the Auxiliary settings menu highlight Freeze Stat Function.
2. Press CONFIRM. The freeze stat function screen will be displayed.
3. Use buttons F3 and F4 to adjust the minimum outdoor ambient temperature at which freeze stat
function will begin to operate, (3 - 20 °C).
4. If (**) is chosen freeze stat function is deactivated.
Note:
When the system is turned off, freeze stat function is not enabled.
Simultaneous Operation
For periods of very low outside temperature this mode can be used. Simultaneous operation allows both DHW and
space heating to run together by using the heat pump and/or booster heater to provide space heating whilst only
the immersion heater provides heating for DHW. This operation is only available if BOTH a DHW
tank AND immersion heater are present on the system.
1. From the Operation settings menu use F1 and F2 buttons to scroll through the list until Simultaneous
operation is highlighted.
2. Press CONFIRM.
3. Simultaneous operation screen is displayed.
4. To switch simultaneous operation ON/OFF press F1.
5. To alter the temperature at which simultaneous operation starts use F3 and F4.
Note:
Range of outdoor ambient temperature is −15°C to 10°C (default −15°C). The system shall automatically return to
routine operation. This will happen when the outdoor ambient temp rises above the selected temp for this specific
mode of operation.
Cold Weather Function
For extremely low outdoor ambient temperature conditions when the heat pump’s capacity is restricted, the heating
or DHW is provided only by the electric booster heater (and immersion if present). This function is intended for use
during extreme cold periods only. Extensive use of direct electrical heaters ONLY will result in higher electric usage
and may reduce working life of heaters and related parts.
1. From the Operation settings menu use F1 and F2 buttons to scroll through the list until Cold weather
function is highlighted.
2. Press CONFIRM.
3. Cold weather function screen is displayed.
4. To switch Cold weather function ON/OFF press F1.
5. To alter the temperature at which heater switching function starts use F3 and F4.
Note:
Range of outdoor ambient temperature is −15°C to −10°C (default −15°C). System shall automatically return to
routine operation. This will happen when the outdoor ambient temp rises above the selected temp for this specific
mode of operation.
Flow Temperature Range (Heating)
This function allows operational setting of flow temperature range from the Ecodan® and also the time interval at
which the FTC-4 collects and processes data for the auto adaptation mode. The lower and upper limits entered
here will dictate the flow temperature range at which the system will be able to operate.
64
FTC-4 Installation Manual
26
Main Controller
(continued)
Default settings are 30ºC (lower limit) to 50ºC (higher limit), the installer will be required to judge for the installation in
question whether these settings are appropriate. Systems with low volume in properties of modern insulation
standards will require consideration to the lower limit to ensure the lower temperature can be maintained at the
Ecodan® minimum capacity.
1. From the Operation settings menu use the F1 and F2 buttons to scroll through the list until room temp.
control (HEATING) is highlighted.
2. Press CONFIRM.
3. Use F1 and F2 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.
Floor Dry up Function
The Floor dry up function automatically changes the target hot water temperature in stages to gradually dry
concrete when this particular type of underfloor heating system is installed.
1. Turn off the system using the main controller.
2. From the Operation settings in the service menu, use F1 and F2 buttons to scroll through the list until
Floor dry up function is highlighted.
3. Press CONFIRM to display the FLOOR DRY UP screen.
4. To change settings, press F4. For details on settings, refer to the table overleaf.
5. To start the Floor dry up operation, press F1 button to check a box below “Active” and press CONFIRM.
NOTE: *1. Upon completion of the operation the system stops all the operations except the Freeze stat operation.
*2. For Floor dry up function, the target flow temp of Zone1 is the same as that of Zone2.
*Mitsubishi Electric can not be held liable for improper use of this function that results in any loss or damage.
FTC-4 Installation Manual
65
Main Controller
26
(continued)
External Input Settings
From the service menu use F1 and F2 buttons to highlight External
input settings then press CONFIRM.
Demand Control (IN4)
From the External input settings menu highlight Demand control (IN4).
Press CONFIRM.
1. The Demand control screen is displayed.
2. Press F3 button to select Heat source OFF or Boiler.
3. Press CONFIRM.
Note:
The selection of “OFF”, whilst a signal is being sent to IN4, forcefully
stops all the heat source operations and the selection of “Boiler” stops
operations of heat pump and electric heater and performs boiler
operation.
Outdoor Thermostat (IN5)
From the External input settings menu highlight Outdoor thermostat
(IN5). Press CONFIRM.
1. The Outdoor thermostat screen is displayed.
2. Press F3 button to select Heater or Boiler.
3. Press CONFIRM.
Note:
The selection of “Heater”, whilst a signal is being sent to IN5, performs
electric-heater-only operation and the selection of “Boiler” performs
boiler operation.
66
FTC-4 Installation Manual
27
SD Card Function
SD Card
FTC-4 is equipped with an SD memory card interface. Using
an SD memory card can simplify main controller settings and
can store operating logs (2Gb will store up to 30 days
operation data).*1
1.
Use an SD memory card that complies with
the SD standards.
2.
SD memory cards to the SD standards include
SD, SDHC, miniSD, micro SD, and microSDHC
memory cards. The capacities are available up
to 32 GB. Ensure the chosen SD card maximum
allowable temperature of 55ºC.
3.
When the SD memory card is a miniSD, miniSDHC, microSD, or micro SDHC memory card,
use an SD memory card converter adapter.
4.
Before writing to the SD memory card, release the write-protect switch.
5.
Before inserting or ejecting an SD memory card, make sure to power off the system. If an SD memory
card is inserted or ejected with the system powered on, the stored data could be corrupted or the SD
memory card be damaged.
6.
The read and write operations have been verified using the following SD memory cards, however, these
operations are not always guaranteed as the specifications of these SD memory cards could change.
7.
How To Check Read And Write Operations
a) Check for correct wiring of power supply to the system. (Do not power on the system at this point.)
b) Insert an SD memory card.
c) Power on the system.
d) The LED4 lamp lights if the read and write operations are successfully completed. If the LED4
lamp continues blinking or does not light, the SD memory card cannot be read or written to by
the FTC-4 controller.
8.
Make sure to follow the instruction and the requirement of the SD memory card’s manufacturer.
9.
Format the SD memory card if determined unreadable in step (6). This could make it readable.
Download an SD card formatter from the following site.SD Association homepage:
https://www.sdcard.org/home/
10. FTC-4 supports FAT file system but not NTFS file system.
11. Mitsubishi Electric is not liable for any damages, in whole or in part, including failure of writing to an SD
memory card, and corruption and loss of the saved data, or the like. Back up saved data as necessary.
12. Do not touch any electronic parts on the FTC-4 control board when inserting or ejecting an SD memory
card, or else the control board could fail.
Please contact Mitsubishi Electric Pre Sales Technical on 01707 278666 for further information
*1. To edit main controller settings or to check operating data, an Ecodan® service tool (for use with PC) is required.
*2. An SD memory card is live for a while after the system is powered off. Before insertion or ejection wait until the LED lamps on the
FTC-4 control board are all off.
*3. Mitsubishi Electric is not liable for any damages, in whole or in part, including failure of writing to an SD memory card, and corruption
and loss of the saved data, or the like. Back up saved data as necessary.
FTC-4 Installation Manual
67
Error Codes
28
Error Codes
Code
Error
Action
L3
Circulation water temperature overheat protection
Flow rate may be reduced check for:
• Water leakage
• Blocked strainer
• Water circulation pump function
L4
DHW tank water temperature overheat protection
Check immersion heater and its
contactor
L5
Indoor unit temperature thermistor failure *1
Check resistance across thermistor
L6
Circulation water freeze protection
See action for L3
L8
Heating operation error
Re-attach any thermistors that have
become dislodged
L9
Low primary circuit flow rate detected by flow switch *1
See action for L3, check DIP switches,
replace flow switch
LC
Boiler circulation water temperature overheat protection
Check that target temperature of boiler
exceeds the restriction (See manual for
thermistors PAC-TH011HT-E)
LD
Boiler temperature thermistor failure *1
Check resistance across thermistor
LE
Boiler operation error
See action for L8. Check status of
the boiler
LH
Boiler circulation water freeze protection
See action for L3
LL
Settings errors of DIP switches on FTC-4 control board
For boiler operation check that DIP
SW1-1 is set to ON and DIP SW2-6 is set
to ON. For 2 zone control, check that DIP
SW2-6 and SW 2-7 are set to ON.
J0
Communication failure between FTC-4 and wireless receiver
Check connection cable for damage
or loose connections
P1
Room temperature thermistor failure *1
Check resistance across thermistor
P2
Refrigerant temperature thermistor failure *
Check resistance across thermistor
P6
Antifreeze protection of plate heat exchanger
See action for L3
J1-J8
Communication failure between wireless receiver and
wireless remote controller
Check remote controller battery, check
pairing between remote controller and
receiver, test the wireless connection
J9
Communication failure between main controller and
FTC-4 slave board
Check connection cable for damage or
loose connections
E0–E5 Communication failure between main controller and
FTC-4 master board
Check connection cable for damage or
loose connections
E6–EF Communication failure between FTC-4 and outdoor unit
Check outdoor unit is not turned off,
check connection cable for damage or
loose connections, refer to outdoor
unit service manual
E9
Check both units are switched on,
Check connection cables for damage
or loose connections, refer to outdoor
unit service manual
See action for L3
1
Outdoor unit receives no signal from outdoor unit
U*, F* Outdoor unit error
68
FTC-4 Installation Manual
Refer to outdoor unit service manual
28
Error Codes
(continued)
Note:
To cancel error codes please switch system off (Press button E, on Main Controller, for 3 secs).
For description of each LED (LED1 to 3) provided on the FTC-4, refer to the following table.
LED
Meaning
LED 1
Indicates whether power is supplied to FTC-4. Make sure this LED is always lit
LED 3
Indicates state of communication between FTC-4 and outdoor unit. Make sure this LED is always blinking
LED 2
Indicates whether power is supplied to the main controller.
After completing installation and the wiring and piping of the local application and outdoor units, check for
refrigerant leakage, looseness in the power supply or control wiring, wrong polarity, and that the power cable is
securely connected.
Use a 500-volt megohmmeter to check that the resistance between the power supply terminals and ground is at
least 1.0MΩ.
Warning:
Do not use the system if the insulation resistance is less than 1.0MΩ.
Caution:
Do not carry out this test on the control wiring (low voltage circuit) terminals.
When an error occurs when power is applied or during operation
•
Indication of error details
The code, unit, address, and telephone number are displayed.
The telephone number is displayed if registered.
•
Resetting the error
Press the F4 (RESET) button, and the F3 (Yes) button to reset the current error.
FTC-4 Installation Manual
69
Troubleshooting
29
No. Fault Symptom
1
2
Main controller display
is blank.
“Please Wait” remains
displayed on the main
controller.
Possible Cause
Explanation - Solution
1. There is no power supply to
main controller.
1.
2. Power is supplied to main
controller, however, the display
on the main controller does not
appear.
2.
1. "Please Wait" is displayed for up to
6 minutes.
1.
2. Communication failure between
the main controller and FTC-4
(Master).
3. Communication failure between
FTC-4 (Master) and outdoor unit.
70
3
The main screen
appears with a press
of the “ON” button, but
disappears in a second.
The main controller operations do not
work for a while after the settings are
changed in the service menu. This is
because the system takes time to apply
the changes.
4
LED2 on FTC-4 (Master)
is off.
When LED1 on FTC-4 (Master) is also off.
Check LED2 on FTC-4 (Master).
(i) When LED2 is lit.
Check for damage or contact failure of the main controller wiring.
(ii) When LED2 is blinking.
Refer to No. 5 below.
(iii) When LED2 is not lit.
Refer to No. 4 below.
Check the following:
• Disconnection between the main controller cable and the FTC-4
(Master) control board
• Failure of the main controller if “Please Wait” is not displayed.
• Refer to No. 2 below if “Please Wait” is displayed.
Normal operation.
2, 3. Main controller start up checks/procedure.
(i) If “0%” or “50-99%” is displayed below "Please Wait" there is a
communication error between the main controller and the FTC-4
(Master) control board.
• Check wiring connections on the main controller.
• Replace the main controller or the FTC-4 (Master) control board.
(ii) If “1-49%” is displayed there is a communication error between
the outdoor unit's and FTC-4 (Master) control boards.
• Check the wiring connections on the outdoor unit control board
and the FTC-4 (Master) control board.
(Ensure S1 and S2 are not cross-wired and S3 is securely wired
with no damage.
• Replace the outdoor unit's and/or the FTC-4 (Master) control boards.
The indoor unit is applying updated settings made in the service menu.
Normal operation will start shortly.
<FTC-4 (Master) powered via outdoor unit.>
1. The outdoor unit is not supplied at
the rated voltage.
1.
2. Defective outdoor controller circuit
board.
2.
3. FTC-4 (Master) is not supplied with
220 to 240V AC.
3.
4. FTC-4 (Master) failure.
4.
5. Faulty connector wiring.
5.
FTC-4 Installation Manual
Check the voltage across the terminals L and N or L3 and N on the
outdoor power board.
• When the voltage is not 220 to 240V AC, check wiring of the
outdoor unit and of the breaker.
• When the voltage is at 220 to 240V AC, go to “2.” below.
Check the voltage across the outdoor unit terminals S1 and S2.
• When the voltage is not 220 to 240V AC, check the fuse on the
outdoor control board and check for faulty wiring.
• When the voltage is 220 to 240V AC, go to “3.” below.
Check the voltage across the indoor unit terminals S1 and S2.
• When the voltage is not 220 to 240V AC, check FTC-4 (Master)outdoor unit wiring for faults.
• When the voltage is 220 to 240V AC, go to “4.” below.
Check the FTC-4 (Master) control board.
• Check the fuse on FTC-4 (Master) control board.
• Check for faulty wiring.
• If no problem found with the wiring, the FTC-4 (Master) control
board is faulty.
Check the connector wiring.
• When the connectors are wired incorrectly, re-wire the connectors
referring to electrical installation section
29
Troubleshooting
XXXXXXXX
No. Fault Symptom
4
LED2 on FTC-4 (Master)
is off.
(continued)
Possible Cause
Explanation - Solution
<FTC-4 (Master) powered on
independent source>
1. FTC-4 (Master) is not supplied with
220 to 240V AC.
1.
Check the voltage across the L and N terminals on the indoor power
supply terminal block. (See section 4.1.)
• When the voltage is not 220 to 240V AC, check for faulty wiring to
power supply.
• When the voltage is 220 to 240V AC, go to 2. below.
2. There are problems in the method
of connecting the connectors.
2.
Check for faulty wiring between the connectors.
• When the connectors are wired incorrectly re-wire them correctly
referring to below. (See section 4.1 and a wiring diagram on the
control and electrical box cover.)
• If no problem found with the wiring, go to 3. below.
3. FTC-4 (Master) failure.
3.
Check the FTC-4 (Master) control board.
• Check the fuse on FTC-4 (Master) control board.
• Check for faulty wiring.
• If no problem found with the wiring, the FTC-4 (Master) control
board is faulty.
When LED1 on FTC-4 (Master) is lit.
Recheck the refrigerant address setting on the outdoor unit.
Incorrect setting of refrigerant address for
Set the refrigerant address to “0”.
outdoor unit.
(Set refrigerant address using SW1(3 - 6) on outdoor controller circuit board.)
(None of the refrigerant address is set to"0".)
5
LED2 on FTC-4
(Master) is blinking.
When LED1 is also blinking on FTC-4
(Master).
Faulty wiring between FTC-4 (Master)
and outdoor unit
Check for faulty wiring between FTC-4 (Master) and outdoor unit.
When LED1 on FTC-4 (Master) is lit.
1. Faulty wiring in main controller
Multiple indoor units have been
wired to a single outdoor unit.
1.
2. Short-circuited wiring in main
controller
2.,3. Remove main controller wires and check LED2 on FTC-4 (Master).
• If LED2 is blinking check for short circuits in the main controller wiring
• If LED2 is lit, wire the main controller again and:
- if LED2 is blinking, the main controller is faulty;
- if LED2 is lit, faulty wiring of the main controller has been corrected.
3. Main controller failure
6
7
LED4 on FTC-4
(Master) is off.
Check for faulty wiring in main controller.
The number of indoor units that can be wired to a single outdoor unit
is one. Additional indoor units must be wired individually to a single
outdoor unit.
1. SD memory card is NOT inserted
into the memory card slot with
correct orientation.
1.
Correctly insert SD memory card in place until a click is heard.
2. Not an SD standards compliant
memory card.
2.
Use an SD standards compliant memory card. (Refer to P.67)
LED4 on FTC-4
(Master) is blinking.
1.
2.
3.
4.
Full of data.
Write-protected.
NOT formatted.
Formatted in NTFS file system.
1.
2.
3.
4.
Move or delete data, or replace SD memory card with a new one.
Release the write-protect switch.
Refer to P.67
FTC-4 is Not compatible with NTFS file system. Use an SD memory
card formatted in FAT file system.
No water at hot tap.
1. Cold main off
2. Strainer (field supply) blocked.
1.
2.
Check and open stop cock.
solate water supply and clean strainer.
FTC-4 Installation Manual
71
Troubleshooting
29
XXXXXXX
XXXXXXXX
No. Fault Symptom
8
9
10
Cold water at tap.
Water heating takes
longer.
Temperature of DHW
tank water dropped.
(continued)
Possible Cause
Explanation - Solution
1. Hot water run out.
1.
Ensure DHW mode is operating and wait for DHW tank to re-heat.
2. Prohibit, schedule timer or holiday
mode selected.
2.
Check settings and change as appropriate.
3. Heat pump not working.
3.
Check heat pump – consult outdoor unit service manual.
4. Booster heater cut-out tripped.
4.
Check booster heater thermostat and press reset button if safe.
Reset button is located on the side of booster heater, covered with
white rubber cap. See component parts diagram (Installation manual of
Hydrobox, section 3.) to find out its position.
5. The earth leakage circuit breaker for
booster heater breaker (ECB1) tripped.
5.
Check the cause and reset if safe.
6. The booster heater thermal cut-out
has tripped and cannot be reset
using the manual reset button.
6.
Check resistance across the thermal cut-out, if open then the
connection is broken and the booster heater will have to be replaced.
Contact your Mitsubishi Electric dealer.
7. Immersion heater cut-out tripped.
7.
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.
8. Immersion heater breaker (ECB2)
tripped.
8.
Check the cause and reset if safe.
9. Motorised valve fault
9.
Check plumbing/wiring to motorised valve.
(i) Manually override motorised valve using the main controller. (Refer to
<Manual operation> in section 7.2.) If the valve does not still
function, go to (ii) below.
(ii) Replace motorised valve coil. If the valve does not still function,
go to (iii) below.
(iii) Replace motorised valve. (Refer to the service manual.)
1. Heat pump not working.
1.
Check heat pump – consult outdoor unit service manual.
2. Booster heater cut-out tripped.
2.
Check booster heater thermostat and press reset button if safe.
Reset button is located on the side of booster heater, covered with
white rubber cap. See component parts diagram (Installation manual
of Hydrobox, section 3.) to find out its position.
3. Booster heater breaker tripped.
3.
Check the cause and reset if safe.
4. The booster heater thermal cut-out
has tripped and cannot be reset
using the manual reset button.
4.
Check resistance across the thermal cut-out, if open then connection
is broken and the booster heater will have to be replaced. Contact your
Mitsubishi Electric dealer.
5. Immersion heater cut-out has been
triggered.
5.
Check immersion heater thermostat and press reset button located on
immersion heater boss, if safe. If the heater kept running with no water
inside, this may have resulted in failure, so replace it with a new one.
6. Immersion heater breaker tripped.
6.
Check the cause and reset if safe.
1.
Take the following measures.
• Retighten the nuts holding the pipes onto the DHW tank.
• Replace seal materials.
• Replace the pipes.
2.
Fix insulation.
3.
Check plumbing/wiring to motorised valve.
(i) Manually override 3-way valve using the main controller. (Refer to <Manual
operation> in section 7.2.) If the valve does not still function, go to (ii) below.
(ii) Replace motorised valve coil. If the valve does not still function, go to (iii) below.
(iii) Replace motorised valve. (Refer to the service manual.)
When DHW operation is not running, the
DHW tank emits heat and the water
temperature decreases to a certain level. If
water in the DHW tank is reheated frequently
because of a significant drop in water
temperature, check for the following.
1. Water leakage in the pipes that connect
to the DHW tank
2. Insulation material coming loose or off.
3. Motorised valve failure
72
FTC-4 Installation Manual
29
Troubleshooting
XXXXXXX
XXXXXXXX
No. Fault Symptom
(continued)
Possible Cause
Explanation - Solution
11
Hot or warm water
from cold tap.
Heat of hot water pipe is transferred to cold
water pipe
Insulate/re-route pipework.
12
Water leakage
1. Poorly sealed connections of water
circuit components
1.
Tighten connections as required.
2. Water circuit components reaching the
end of life
2.
Refer to PARTS CATALOG in the service manual for expected part lifetimes
and replace them as necessary.
1. Prohibit, schedule timer or holiday mode
selected.
1.
Check settings and change as appropriate.
2. Check settings and change as
appropriate.
2.
Check the battery power and replace if flat.
3. The temperature sensor is located in a
room that has a different temperature
relative to that of the rest of the house.
3.
Relocate the temperature sensor to a more suitable room.
4. Heat pump not working.
4.
Check heat pump – consult outdoor unit service manual.
5. Booster heater cut-out tripped.
5.
Check booster heater thermostat and press reset button if safe.
Reset button is located on the side of booster heater, covered with white
rubber cap. (See component parts diagram in Installation manual of Hydrobox,
section 3. for position.)
6. Booster heater breaker (ECB1) tripped.
6.
Check the cause of the trip and reset if safe.
7. The booster heater thermal cut-out
tripped and can not be reset using the
manual reset button.
7.
Check resistance across the thermal cut-out, if open then the connection is
broken and the booster heater will have to be replaced. Contact your
Mitsubishi Electric dealer.
8. Incorrectly sized heat emitter.
8.
Check the heat emitter surface area is adequate Increase size if necessary.
9. Motorised valve failure
9.
Check plumbing/wiring to motorised valve.
10. Battery problem (*wireless control only)
10.
Check the battery power and replace it flat.
11. If a mixing tank is installed, the flow rate
between the mixing tank and the
hydrobox is less than that between the
mixing tank and the local system.
11.
Increase the flow rate between the mixing tank and the hydrobox decrease
that between the mixing tank and the local system.
1. When Zone1 and Zone2 are both in
heating mode, the hot water temperature
in Zone2 does not exceed that in Zone1.
1.
Normal action no action necessary.
2. Faulty wiring of motorized mixing valve
2.
Refer to "5.3 Wiring for 2-zone temperature control".
3. Faulty installation of motorized mixing
valve
3.
Check for correct installation. (Refer to the manual included with each
motorized mixing valve.)
4. Incorrect setting of Running time
4.
Check for correct setting of Running time.
5. Motorized mixing valve failure
5.
Inspect the mixing valve. (Refer to the manual included with each motorized
mixing valve.)
13
14
Heating system does
not reach the set
temperature.
In 2-zone temperature
control, only Zone2 does
not reach the set
temperature.
15
When a PUHZ-FRP
outdoor unit is
connected, DHW or
Heating operation
cannot run.
The outdoor unit is set to have operation of
Turn ON Electric heater (Heating) or Electric heater (DHW) using the main controller.
the indoor unit of air conditioner take
precedence over that of the hydrobox, and in
the main controller settings "Electric heater
(Heating)" or "Electric heater (DHW)" is turned
off.
16
When a PUHZ-FRP
outdoor unit is connected
and is in heat
recovery operation,
the set temperature
is not reached.
When the outdoor unit is set to have cooling
operation of the indoor unit of air conditioner
take precedence over that of the hydrobox,
the outdoor unit controls the frequency of the
compressor according to the load of air
conditioner. The DHW and heating run
according to that frequency.
Normal operation no action necessary. If Air-to-Water system is given priority in
operation, comp Hz can be regulated depending on the load of DHW or Heating. For
more details, refer to the PUHZ-FRP installation manual.
FTC-4 Installation Manual
73
Troubleshooting
29
XXXXXXX
XXXXXXXX
No. Fault Symptom
Possible Cause
Explanation - Solution
17
After DHW operation
room temperature
rises slightly.
At the end of the DHW mode operation the
motorised valve diverts hot water away from
the DHW circuit into space heating circuit.
This is done to prevent the hydrobox
components from overheating. The amount
of hot water directed into the space heating
circuit varies according to the type of the
system and of the pipe run between the
plate heat exchanger and the hydrobox.
Normal operation no action necessary.
18
The room temperature
rises during DHW
operation.
Motorised valve failure
Check the motorised valve.
19
Water discharges
from pressure relief
valve. (Primary circuit)
1. If continual – pressure relief valve may
be damaged.
1.
Turn the handle on the pressure relief valve to check for foreign objects in it. If
the problem is not still solved, replace the pressure relief valve with a new one.
2. If intermittent – expansion vessel charge
may have reduced/bladder perished.
2.
Check pressure in expansion vessel.
Recharge to 1 bar if necessary.
If bladder perished replace expansion vessel with a new one.
Water discharges
from pressure relief
valve (field supplied
item).
(Sanitary circuit)
1. If continual – field supplied pressure
reducing valve not working.
1.
Check function of pressure reducing valve and replace if necessary.
2. If continual – pressure relief valve seat
may be damaged.
2.
Turn the handle on the pressure relief valve to check for foreign objects inside.
If the problem is not still solved, replace the pressure relief valve.
3. If intermittent – expansion vessel charge
may have reduced/bladder perished.
3.
Check gas-side pressure in expansion vessel.
Recharge to correct precharge pressure if necessary.
If bladder perished replace expansion vessel with a new one with appropriate
precharge.
4. DHW tank may have subjected to
backflow.
4.
Check gas-side pressure in DHW tank. If pressure in DHW tank is similar to
that in incoming mains, cold water supply that merges with incoming mains
water supply could flow back to DHW tank. Investigate source of back-feed
and rectify error in pipework/fitting configuration. Adjust pressure in cold
supply.
20
21
Noisy water circulation
pump
Air in water circulation pump .
Use manual and automatic air vents to remove air from system.
Top up water if necessary to achieve 1 bar on primary circuit.
22
Noise during hot
water draw off
typically worse in the
morning.
1. Loose airing cupboard pipework.
1.
Install extra pipe fastening clips.
2. Heaters switching on/off.
2.
Normal operation no action necessary.
Mechanical noise
heard coming from
the hydrobox.
1. Heaters switching on/off.
Normal operation no action necessary.
Water circulation
pump runs for a
short time unexpectedly
.
Milky/Cloudy water
(Sanitary circuit)
Water circulation pump jam prevention
mechanism (routine) to inhibit the build-up of
scale.
Normal operation no action necessary.
Oxygenated water
Water from any pressurised system will release oxygen bubbles when water is
running. The bubbles will settle out.
26
Heating mode has been on
standby for a long time
(does not start operation
smoothly.)
The time of “Delay” set in “Economy settings
for pump” is too short. (Go to “Service
menu” → “Auxiliary settings” → “Economy
settings for pump”).
Increase the time of “Delay” in “Economy settings for pump” .
27
The hydrobox that was
The hydrobox is designed to run in an
running in the heating mode operation mode with a higher priority (i.e.
before power failure is
DHW mode in this case) at power recovery.
running in the DHW mode
after power recovery.
23
24
25
74
(continued)
2. motorised valve changing position
between DHW and heating mode.
FTC-4 Installation Manual
•
•
Normal operation.
After the DHW max. operation time has elapsed or the DHW max.
temperature has been reached, the DHW mode switches to the other
mode (ex. Heating mode).
29
Troubleshooting
XXXXXXX
XXXXXXXX
No. Fault Symptom
(continued)
Possible Cause
Explanation - Solution
28
Cooling mode is NOT
available.
Dip SW2-4 is OFF.
Turn Dip SW2-4 to ON. (Refer to “5.1 Dip Switch Functions” in this manual.)
29
The cooling system
does not cool down to
the set temperature.
1. When the water in the circulation circuit
is unduly hot, Cooling mode starts with a
delay for the protection of the outdoor
unit.
1.
Normal operation.
2. When the outdoor temperature is lower
than the preset temperature below which
the freeze stat. function is activated,
Cooling mode does not start running.
2.
To run Cooling mode overriding the freeze stat. function, adjust the preset
temperature below which the freeze stat. function is activated. (Refer to
“<Freeze stat function>” on Page 49.
30
The electric heaters are
activated shortly after DHW
or LP mode starts running
after Cooling mode.
The setting time period of Heat-pump-only
operation is short.
Adjust the setting time period of Heat-pump only operation. (Refer to “<Electric
heater (DHW)> on Page 47.
31
During DHW or LP mode
following the cooling mode,
error L6 (circulation water
freeze protection) occurs
and operation stops
frequently.
If the preset temperature below which the
freeze stat. function is activated is low, error
L6 is more likely to occur interruption
operation before the freeze stat. function is
activated.
Adjust the preset temperature below which the freeze stat. function is activated.
(Refer to “<Freeze stat function>” on Page 49.
FTC-4 Installation Manual
75
Spare Parts
30
SAP No.
Part Code
PUMPUPS22560
GRUNDFOS CIRC PUMP - UPS2 25-60
268228
VALVEABVDU145
HONEYWELL AUTO BYPASS VALVE DU145
268325
VALVE2PORTH
HONEYWELL - 2 PORT ZONE VALVE
261080
TBC
FERNOX TF1 MAGNETIC COMPACT FILTER
268227
Description
Non Stock Spare Parts
VALVEGPV22
GATE TYPE PUMP ISOLATING VALVE 22mm COMP
VALVEGPV28
28MM GATE TYPE PUMP VALVE
EXPVESB12ALT
12L EXPANSION VESSEL C/W BRKT
EXPVESB19ALT
19L EXPANSION VESSEL C/W BRKT
EXPVESB24ALT
24L EXPANSION VESSEL C/W BRKT
IMHTRSS
1.3/4" IMM HEATER SGL PHASE SS
TUNDPL15ALT
ACETAL TUNDISH 15mm INLET 22mm OUTLET
AIRVENTBOT1/2
AUTOMATIC AIR RELEASE VALVE 1/2"
CONTSETALT533K
ALTECNIC INLET CONTROL SET TYPE 533 KS
VALVEPRALT533K
ALTECNIC 6BAR PRES. RELIEF VALVE SPARE
VALVETP1/2ALT
TEMP AND PRESSURE RELIVE VALVE 7 BAR
PIPEMAIN
PREFAB PIPE COIL MAIN
PIPECOILOUT
PREFAB PIPE COIL OUTLET MITSI
PIPECOILIN
PREFAB PIPE COIL INLET MITSI
PIPEINLET180
PREFAB PIPE INLET 180 MITSI
PIPEINLET210
PREFAB PIPE INLET 210 MITSI
PIPEINLET300
PREFAB PIPE INLET 300 MITSI
PIPEINLET210S
PREFAB PIPE INLET 210S MITSI
PIPEINLET250S
PREFAB PIPE INLET 250S MITSI
PIPETUNDISH150
PREFAB PIPE TUNDISH 150 MITSI
PIPETUNDISH210S
PREFAB PIPE TUNDISH210S MITSI
FLOOP2
FILLING LOOP - NEW VALVE DESIGN
All non Stock Spare Parts are available upon request.
Please contact the Spares Department on 0161 8666089 (Option 2) for all enquiries.
76
FTC-4 Installation Manual
31
Fernox Protector HP-5c
Product Uses
Fernox HP-5c is a concentrated heat transfer fluid capable of frost protection from -4ºC
$ #3TPumps
#,3Tand underfloor heating
to -14ºC especially formulated for use in Air Source2 Heat
•
circuits. Fernox HP-5c also provides long term protection from damage caused by
corrosion, limescale and bacteria and maintains a stable pH across a range of
operational temperatures. Fernox
is compatible with all materials commonly used
2 $ #3THP- 5c
#,3T
• Pumps and underfloor heating systems.
in Heat
• Concentrated heat transfer fluid suitable for use in Air
Source Heat Pumps and underfloor heating systems
• Frost protection from -4°C to -14°C
• Protects against corrosion, limescale
and bacterial contamination 4
• Non-toxic
• Compatible with all materials commonly found in Heat Pump and underfloor heating systems
• pH stable
A& #
A& #
Physical
Properties
4
Composition
Anaquepus solution of monopropylene glycol with specifically
formulated inhibitors, stabilisers and biocides
Odour
Characteristics
Form
Liquid
Appearance
Clear, blue liquid
Density
1.03 - 1.05
pH
6-7
<
?
'
* $ $ $Q #
Application and Dosage
Dilute before use with mains water. In order to ensure adequate corrosion and biocidal protection, the minimum
“in-use” concentration of the product is 10%. Maximum “in-use” concentration is 30%. Upon dilution Fernox HP-5C
will provide frost protection according to the table below:
Concentration
10%
Frost Protection
-4°C
<
20%
-9·C
?
'
* $ $ $Q #
20%
P
-14°C
Frost protection level can be checked using a
Fernox Refractometer. Existing heating systems
should be cleaned of sludge and limescale
deposits with a suitable Fernox Heat Pump
Cleaner before adding Fernox HP-5c.
Available from Mitsubishi Electric in the following quantities
Quantity
SAP No.
10 litre
246670
25 litre
246671
FTC-4 Installation Manual
77
P
Annual Service Tasks
32
Ecodan®
Model No.
Ecodan®
Serial No.
MECHANICAL TASKS
1
Inspect and clean evaporator fins. Repair damaged fins using a fin comb if required
2
Check visually for signs of oil leaks which may indicate a refrigerant leak (check for leaks if necessary)
3
Check integrity of water pipe work and lagging, repair lagging if required
4
Check system operation
5
Check the antifreeze and if necessary top up the concentration as per manufacturers recommendations
6
Check and clean the fernox TF1 magnetic particle filter
7
Check system pressure
8
Release any air from the primary/heating systems
CONTROLLER TASKS
9
Check for the correct operation and temperature setting of the thermostats
10
Check the operation of the zone valves
11
Check the operation and the timing of the immersion heater
On completion check that the whole system is working satisfactorily
Mitsubishi Electric recommends that the frequency of maintenance visits to be a maximum of 12 months
between inspections.
Frequency of maintenance may increase dependent upon the equipment and local water conditions e.g. hard water,
scale forming, water containing a high proportion of solids.
Failure to maintain the system to the above minimum recommendations could result in the warranty becoming null
and void.
Please fill in the Service Record sheet to confirm the above tasks have been carried out on the Ecodan® outdoor unit.
78
FTC-4 Installation Manual
33
Ecodan® Service Record
It is recommended that your Ecodan® is serviced regularly and that the appropriate Service Interval Record is completed.
Service Provider
Before completing the appropriate Services Interval Record below, please ensure you have carried out the service as
described in the manufacturer’s instructions.
Only use genuine spare parts made by Mitsubishi Electric.
SERVICE 1
SERVICE 2
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
Comments:
Sig.
Date:
Sig.
SERVICE 3
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
AEI No.
AEI Telephone No.
Comments:
Sig.
Date:
Sig.
SERVICE 5
Date:
SERVICE 6
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
AEI No.
AEI Telephone No.
Comments:
Sig.
Date:
Sig.
SERVICE 7
Date:
SERVICE 8
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
AEI No.
AEI Telephone No.
Comments:
Sig.
Date:
Sig.
SERVICE 9
Date:
SERVICE 10
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
AEI No.
Comments:
Comments:
Sig.
Date:
SERVICE 4
AEI Engineer Name:
AEI Telephone No.
AEI No.
AEI Telephone No.
Date:
Sig.
Date:
FTC-4 Installation Manual
79
Mains Pressure Hot Water Storage System Service Record
34
It is recommended that your Ecodan® is serviced regularly and that the appropriate Service Interval Record is completed.
Service Provider
Before completing the appropriate Services Interval Record below, please ensure you have carried out the service as
described in the manufacturer’s instructions.
Only use genuine spare parts made by Mitsubishi Electric.
SERVICE 1
SERVICE 2
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
Comments:
Sig.
Date:
Sig.
SERVICE 3
Date:
SERVICE 4
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
AEI No.
AEI Telephone No.
Comments:
Sig.
Date:
Sig.
Date:
SERVICE 6
SERVICE 5
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
AEI No.
AEI Telephone No.
Comments:
Sig.
Date:
Sig.
SERVICE 7
Date:
SERVICE 8
AEI Engineer Name:
AEI Engineer Name:
AEI Company Name:
AEI Company Name:
AEI No.
AEI Telephone No.
Comments:
AEI No.
AEI Telephone No.
Comments:
Sig.
Date:
Sig.
SERVICE 9
AEI Engineer Name:
AEI Company Name:
AEI Telephone No.
AEI Company Name:
AEI No.
FTC-4 Installation Manual
AEI Telephone No.
AEI No.
Comments:
Comments:
Sig.
Date:
SERVICE 10
AEI Engineer Name:
80
AEI No.
AEI Telephone No.
Date:
Sig.
Date:
35
Commissioning Checklist
Mains Pressure Hot Water Storage System
This Commissioning Checklist is to be completed in full by the competent person who commissioned the storage system as a means of demonstrating compliance with the
appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturers
instructions may invalidate the warranty but does not affect your statutory rights.
Customer Name
Address
Tel No.
Cylinder Make & Model
Cylinder Serial No.
Commissioned By (print name)
Company Address
Reg Operative ID No.
Customer Name
Commissioning Date
To be completed by the customer on receipt of a Building Regulations Compliance Certificate*
Building Regulations Notification No. (if applicaable)
ALL SYSTEMS PRIMARY SETTINGS
(indirect heating only)
1 Is the primary circuit a sealed or open vented system?
Tick the appropriate boxes if applicable
Open
Sealed
2 What is the maximum primary flow temperature?
°C
ALL SYSTEMS
Tick the appropriate boxes if applicable
1 What is the incoming static cold water pressure at the inlet to the system?
bar
2 Has a strainer been cleaned on installation debris (if fitted) ?
Yes
No
3 Is the installation in a hard water area (above 200ppm) ?
Yes
No
4 If Yes, has a water scale reducer been fitted ?
Yes
No
5 What type of scale reducer has been fitted ?
6 What is the hot water thermostat set temperature ?
°C
7 What is the maximum hot water flow rate at set thermostat temperature (measured at high flow outlet) ?
l/min
8 Time and temperature controls have been fitted in compliance with Part L of the Building Regulations?
9 Type of control system (if applicable)
Y Plan
10 Is the cylinder solar (or other renewable) compatible ?
Yes
Yes
Other
S Plan
No
11 What is the hot water temparature at the nearest outlet ?
°C
12 All appropriate pipes have been insulated up to 1 metre or the point where they become concealed
Yes
UNVENTED SYSTEMS ONLY
Tick the appropriate boxes if applicable
1 Where is the pressure reducing valve situated (if fitted) ?
2 What is the pressure reducing valve setting ?
bar
3 Has a combined temperature and pressure relief valve and expansion valve been fitted and discharge tested ?
Yes
4 The tundish and discharge pipework have been connected and terminated to Part G of the Building Regulations
Yes
5 Are all energy sources fitted with a cut out device ?
Yes
6 Has the expansion vessel or internal air space been checked ?
Yes
THERMAL STORES ONLY
No
No
No
Tick the appropriate boxes if applicable
1 What store temperature is achievable ?
°C
2 What is the maximum hot water temperature ?
°C
ALL INSTALLATIONS
Tick the appropriate boxes if applicable
1 The hot water system complies with the appropriate Building Regulations
Yes
2 The system has been installed and commissioned in acordance with the manufacturer’s instructions
Yes
3 The system controls have been demonstrted to and unstood by the customer
Yes
4 The manufacturer’s literature, including Benchmark Checklist and Service Record, has been explained and left with the customer
Yes
Customer
Name Engineers Signature
Commissioning
Customer’s Signature (to confirm satisfactory demonstration and receipt of manufacturer’s literature)
* All installations in England and Wales must be notified to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme.
A Building Regulations Compliance Certificate will the be issued to the customer.
© Heating and Hotwater Industry Council (HHIC)
www. centralheating.co.uk
FTC-4 Installation Manual
81
Air To Water Heat Pump Commissioning Checklist
36
This Commissioning Checklist is to be completed in full by the AEI who commissioned the Ecodan® and associated equipment as a means of demonstrating compliance with
the appropriate Building Regulations and then handed to the customer to keep for future reference. For further information, please refer to Mitsubishi Electric training literature
and installation manual. Failure to install and commission this equipment to the manufacturers instructions may invalidate the warranty but does not affect statutory rights.
Customer Name
Address
Tel No.
Ecodan® Model
Ecodan® No.
Commissioned By (print name)
Commissioning Date
AEI Company Name & Address
AEI No.
Tel No.
Building Regulations Notification No. (if applicable)
CONTROLS - SYSTEM AND HEAT PUMP
Tick the appropriate boxes if applicable
1 Time & Temperature
Control To Heating
Room Thermostat &
Programmer/Timer
2 Time & Temperature Control To Hot Water
Cylinder Thermostat & Programme Timer
Combined with heat pump main controls
3 Heating Zone Valves (including underfloor loops)
Fitted
Not Required
4 Hot Water Zone Valves
Fitted
Not Required
5 Thermostatic Radiator Valves
Fitted
Not Required
6 Heat Pump Safety Interlock
Built in
Provided
7 Flow & Cylinder temperature sensors correctly positioned?
Yes
8 Automatic Bypass System
Programmable
Room state
Yes
No
Not Required
9 Weather Compensation Settings (if applicable)
°C flow at
°C outdoor &
10 Control System
FTC-2
FTC-3
Yes
12 Are the third party controls correctly interlocked?
Yes
Optimum Start
Control
No
Fitted
11 Third Party Controls?
Weather
Compensation
°C oflow at
°C outdoor &
FTC-4
No
Manufacturer Name & Model
No
ALL SYSTEMS
Tick the appropriate boxes if applicable
1 The heating system has been filled and pressure tested
Yes
2 Expansion vessel for heating is sized, fitted & charged in accordance with manufacturer’s instructions
Yes
3 The heat pump is fitted on a solid/stable surface capable of taking its weight
Yes
4 The system has been flushed and cleaned in accordance with BS7593 and heat pump manufacturer’s instructions
Yes
5 What system cleaner was used?
6 Outdoor fuse rating
A
Type
7 Cylinder coil surface area
M2
Not available heating only
8 What antifreeze was used
9 What is the concentration level?
% or down to
10 Legionella protection
°C every
°C
days
11 Ciculating pump(s) speed settings?
Domestic hot water
12 Measured flowrate
13 Measured steady state delta T (Flow and Return)
Heating
Litres/min
°C
Flow Temperature
°C
OUTDOOR UNIT
Yes
No
2 Is the fan free from obstacles and operational? Adequate airflow?
Yes
No
3 Has suitable consideration been made for condensate discharge?
Yes
No
4 Flow and return isolation valves fitted?
Yes
No
5 Anti-Vibration mounting pads fitted?
Yes
No
HEATING MODE
°C
Tick the appropriate boxes if applicable
1 Heating Temperatures
Heating Flow Temperature
2 Emitter type
underfloor heating
Yes
°C
radiators
Heating Return Temperature
Yes
towel rail
°C
Yes
Yes
3 Emitters balanced?
Yes
4 Air removed from system?
Tick the appropriate boxes if applicable
Measure and Record
1 Is the heat pump connected to a hot water cylinder?
Unvented
Vented
°C (maximun 55°C)
2 Domestic hot water target temperature
3 Hot water has been checked at all outlets
Yes
4 Have Thermostatic blending valves been fitted?
Yes
Not Connected
Cylinder heat up
Tick the appropriate boxes if applicable
1 Additional heat sources connected
Gas Boiler
Oil Boiler
Electric Heater
2 Remove & clean line strainer if present
Yes
No
Not Applicable
3 The operation of the heat pump and system controls have been
demonstrated to the customer
Yes
No
Not Applicable
Customer
Name Engineers Signature
Commissioning
FTC-4 Installation Manual
minutes
Not required
ADDITIONAL SYSTEM INFORMATION
82
Litres/min
Tick the appropriate boxes if applicable
1 Is all external pipework insulated?
DOMESTIC HOT WATER MODE
Return Temperature
Solar Thermal
Customer’s Signature (to confirm demonstration of equipment and receipt of appliance instructions)
Other
Telephone: 01707 278666
After Sales Service: 0161 866 6089
email: heating@meuk.mee.com
web: heating.mitsubishielectric.co.uk
UNITED KINGDOM Mitsubishi Electric Europe Living Environmental Systems Division
Travellers Lane, Hatfield, Hertfordshire, AL10 8XB, England
General Enquiries Telephone: 01707 282880 Fax: 01707 278881
IRELAND Mitsubishi Electric Europe Westgate Business Park, Ballymount, Dublin 24, Ireland
Telephone: Dublin (01) 419 8800 Fax: Dublin (01) 419 8890 International code: (003531)
Country of origin: United Kingdom – Japan – Thailand – Malaysia. ©Mitsubishi Electric Europe 2013. Mitsubishi and Mitsubishi Electric
are trademarks of Mitsubishi Electric Europe B.V. The company reserves the right to make any variation in technical specification to the
equipment described, or to withdraw or replace products without prior notification or public announcement. Mitsubishi Electric is constantly
developing and improving its products. All descriptions, illustrations, drawings and specifications in this publication present only general
particulars and shall not form part of any contract. All goods are supplied subject to the Company’s General Conditions of Sale, a copy of
which is available on request. Third-party product and brand names may be trademarks or registered trademarks of their respective owners.
Printed in June 2013 SAP No. 268685