Alpha Pre-Plumb 20 User guide

Installation and Servicing
Instructions
Pre-Plumb 200
Pre-Plumbed cylinder with Hydro heat pump
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
For Technical help or for Service call ...
ALPHA HELPLINE Tel: [phone]
website: www.alpha-innovation.co.uk
Leave these instructions with the User
These instructions have been carefully prepared but we reserve the right
to alter the specification at any time in the interest of product improvement.
© Alpha Therm Limited 2023.
Part No. 1.047798 ST.0006834/001
0623/D460

Alpha Pre-Plumb 200 - Introduction
CONTENTS
1 Introduction.............................................2
2 Safety symbols .......................................3
3 Safety notices.........................................4
4 Technical data ........................................5
5 General package information .................6
6 Connections and clearances ..................7
7 Electrical connection ..............................10
8 Safety discharge.....................................12
9 Heat pump primary circuit ......................14
10 Pump performance.................................15
11 Commissioning.......................................16
12 Instructions for use .................................18
13 Programming parameters.......................23
14 Parameter and information menus .........30
15 Maintenance and checks........................33
16 Fault codes and diagnosis......................36
17 Wiring diagrams .....................................42
18 Energy classification...............................51
19 Benchmark commissioning ....................52
1 INTRODUCTION
The Alpha range of factory built pre-plumbed and wired unvented heat pump cylinders are designed for use with the Alpha
Hydro range of monobloc air source heat pumps.
The cylinder is manufactured in high grade stainless steel with manifold, pump, and zone valves pre-fitted. The unit also has
a pre-wired control panel for all connection and settings according to the system requirements.
The cylinder is fitted with a built-in immersion heater for hot water back up and legionella protection when required.
The cylinder is supplied with all the necessary safety devices to conform with G3 building regulations for unvented cylinders.
High grade insulation is fitted to the cylinder to meet the highest possible heat loss standard.
The unvented cylinder is supplied with an expansion vessel for the domestic water system to be mounted adjacent to the
cylinder in a suitable position.
A separate primary heating expansion vessel must be used according to the overall volume of the primary system. This is
normally calculated when the system heat loss requirements are designed, and the design flow temperature is calculated. A
primary circuit pressure relief valve is pre-fitted to the cylinder.
2

Alpha Pre-Plumb 200 - Safety Symbols
ELECTRICAL HAZARD
Strictly follow all of the indications next to the symbol. The symbol indicates the appliance’s electrical
components or, in this manual, identifies actions that can cause an electrical hazard.
WARNING FOR INSTALLER
Read the instruction manual carefully before installing the product.
EARTH TERMINAL CONNECTION
The symbol identifies the appliance’s earth terminal connection point.
INFORMATION
Indicates useful tips or additional information.
SAFETY GLOVES
SAFETY GOGGLES
The user must not dispose of the appliance at the end of its service life as municipal waste, but send it to
appropriate collection centres.
GENERIC HAZARD
Strictly follow all of the indications next to the symbol. Failure to follow the indications can generate hazard
situations resulting in possible harm to the health of the operator and user in general, and/or property damage.
PERSONAL PROTECTIVE EQUIPMENT
2 SAFETY SYMBOLS
SAFETY FOOTWEAR
LOW FLAMMABILITY MATERIAL
The symbol indicates that the appliance contains low flammability material.
WARNINGS
Strictly follow all of the indications next to the symbol. Failure to follow the indications can generate hazardous
situations resulting in possible minor injuries to the health of both the operator and user in general, and/or
slight material damage.
ATTENTION
Read and understand the instructions of the appliance before carrying out any operation, carefully follow the
instructions given. Failure to observe the instructions may result in malfunction of the unit.
HOT SURFACES
The symbol indicates the appliance’s very hot components that can cause burns.
SHARP SURFACES
The symbol indicates the appliance’s components or parts that can cause cuts if touched.
3

3.1 Mechanical work
The Pre-plumbed cylinder must be connected to a correctly specified Hydro heat pump to achieve the
required output and performance for the building.
The cylinder and heat pump must be installed by a correctly qualified installer with all the necessary certification for the
individual units. If the package is incorrectly installed there is a risk that water leaks, shock or fire may result.
Both the outdoor heat pump and the Pre-plumbed cylinder must be correctly mounted on a base suitable of withstanding the
final weight.
The outdoor unit must be mounted on anti-vibration mounts and the base or bracket correctly selected to prevent noise and
vibration transfer.
The outdoor heat pump must be connected to the primary circuit using insulated flexible connecting hoses.
The position of the outdoor unit must be suitably selected to comply with the regulations in force and be at least 1 m away
from a neighbouring boundary.
The pipework distance between the Pre-plumbed cylinder and the outdoor heat pump should be kept to the minimum
distance possible and not be more than 10 m total pipe distance for either flow or return pipes. All pipework between the
outdoor heat pump and the Pre-plumbed cylinder must be a minimum of 28 mm diameter to allow the correct volume and
flow rates required.
All safety devices and discharge pipework must be correctly installed according to the required regulations for unvented hot
water and sealed heating systems.
Only use accessories and replacement parts approved by Alpha for suitability with the package.
All exposed pipework and fittings must be insulated with suitable 19 mm thickness insulation.
Outdoor pipe and fittings must have UV and water resistant insulation.
3.2 Electrical work
All electrical work must be undertaken by a suitably qualified electrician. All wiring must be in accordance with the relevant
regulations and the guidance within these instructions.
The necessary DNO approval must be sort and a dedicated electrical supply with MCB installed for the outdoor heat pump
unit.
The Pre-plumbed cylinder can be fitted on a 13 A fused spur connection or dedicated MCB connection with 16 A rating.
3.3 General
Keep children and pets away from both the outdoor heat pump unit and the Pre-plumbed cylinder.
Carry out the correct annual maintenance checks to maintain correct function and warranty of the units. All checks must be
undertaken by a suitable qualified engineer.
All external pipework must be fully insulated including fittings and valves to prevent heat loss and freezing in extreme cold
conditions.
The package must be correctly commissioned after final installation to enable correct operation and maintain the warranty.
All parts of the system must be correctly maintained and serviced to ensure correct operation and maintain the warranty.
This appliance is classified as not accessible to the general public. Operation is only permitted through the user interface.
All internal connections and components must only be serviced by a suitable qualified engineer.
Alpha Pre-Plumb 200 - Safety Notices
3 SAFETY NOTICES
4

4 TECHNICAL DATA
Alpha Pre-Plumb 200 - Technical Data
4.1 TECHNICAL DATA
Technical Data Ref. Value
Cylinder water storage capacity 207 l
Domestic water main maximum pressure 12 bar (1.2 MPa)
Domestic water maximum pressure 6 bar (0.6 MPa)
Domestic water maximum temperature 90 °C
Domestic water temperature range 30-60 °C (65°C during legionella protection)
Primary heating maximum temperature 65 °C
Primary heating maximum pressure 3 bar (0.3 MPa)
Standing energy loss of the cylinder EN 12897 56 W
Standing energy loss of the cylinder EN 12897 1.344 kWh/24h (Class B)
Maximum volume of mixed water available at 40°C EN 12897 290.3 l
Domestic hot water expansion vessel capacity 12 l
Vessel pre-charge 2.5 bar (0.25 MPa)
Empty cylinder package weight 65 Kg
Cylinder weight when full 272 Kg
Electrical supply 230 V ~ 50 Hz
Electrical max power input 2400 W
Electrical power consumption - Standby 5 W
Electrical power consumption - Pump 130 W
Nominal power absorption 10.5 A
Degree of protection IPX4D
Cylinder dimensions (h x w x d) 1330 x 762 x 772 mm
DHW connections 1'' BSP - 22 mm
Cylinder material AISI316L
Cylinder thickness 1.5 mm
Maximum ambient temperature +35 °C
Primary Coil
Coil material AISI316L
Coil diameter 25 mm
Coil thickness 0.8 mm
Coil length 19.34 m
Coil exchange surface 1.52 m2
Coil capacity 8.7 l
Maximum primary coil pressure 6 bar (0.6 MPa)
Coil exchange power EN 12897 44.5 kW
Coil design flow rate EN 12897 2100 l
Coil design ∆T EN 12897 18.3 °C
4.2 DATA PLATE - Located on the cylinder on the heat pump flow/return connection plate
5

Alpha Pre-Plumb 200 - General Package Information
5 GENERAL PACKAGE INFORMATION
IMPORTANT: This appliance can be used by children 8 years and above and persons with reduced physical
sensory or mental capabilities or lack of experience and knowledge if they have been given supervisory or
instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not
play with the appliance.
Cleaning and User maintenance shall not be made by children without supervision.
WARNING: Do not switch on if there is a possibility that the water in the heater is frozen
5.1 COMPONENT CHECK LIST
Before commencing installation check that all the components for your Air Source Heat Pump cylinder are contained in the
package. The following components are supplied with your unit :
Factory fitted
Temperature and Pressure Relief Valve (set at 90°C/7 bar)
lmmersion heater and over-temperature cut-out
Expansion relief valve (comprises expansion valve and check valve)
Primary circulating pump
Primary circuit filling loop
Primary circuit pressure gauge
Automatic air vent
Control panel assembly
DHW zone valve
Flow meter
CH zone valve
Drain valve
Supplied loose
Potable water expansion vessel and bracket
Cold water combination valve (comprises pressure reducing valve, strainer and check valve)
Tundish, cold inlet and safety valve group
5.2 STORAGE AND HANDLING
Prior to installation the Pre-plumbed cylinder unit must be stored vertically upright on a secure, level surface in a
dry, frost free environment. Take note of the weight of the product and follow safe working practices when lifting,
moving or manipulating into position. DO NOT lift by the Pre-plumbed pipework manifold.
5.3 SITING THE UNIT
The Pre-plumbed cylinder unit must be vertically floor mounted. lt can be placed anywhere convenient provided
the discharge pipe(s) from its safety valves can be correctly installed and all pre-fitted ancillary parts can be
accessed for servicing and/or maintenance. Areas that are subject to freezing must be avoided. Ensure that the floor is of
sufficient strength to support the 'full' weight of the unit (Section 4, Technical Data). Pipe runs should be kept as short as
possible for maximum economy.
Additional automatic air vents (AAV) (not supplied) may be required at high points in the primary system where pipework is
located above the level of the cylinder. After filling the system (primary circuit), release all trapped air using air vents during
and following heating period and top up with water as necessary. After removing the air, automatic air vent(s) MUST be
closed.
5.4 WATER SUPPLY
Bear in mind that the water supply to the property will be supplying both the hot and cold water requirements
simultaneously.
It is recommended that the maximum water demand is assessed and the water supply checked to ensure this demand can
be satisfactorily met.
Note: A high water pressure will not always guarantee high flow rates.
Wherever possible the cylinder supply pipe should be 22 mm We suggest the minimum supply requirements should be 1.5
bar pressure and 20 litres per minute flow rate. However, at these values outlet flow rates may be poor if several outlets are
used simultaneously. The higher the available pressure and flow rate the better the system performance.
The cylinder has an operating pressure of 3 bar which is controlled by the cold water combination valve assembly. The cold
water combination valve assembly can be connected to a maximum inlet pressure of 12 bar.
Where mixing taps and thermostatic or mixing showers are installed a balanced pressure cold supply must be used.
6

6 CONNECTIONS AND CLEARANCES
Alpha Pre-Plumb 200 - Connections and Clearances
6.1 DIMENSIONS
Fig. 6.1
990
840
683
256 225
340
54
7

Alpha Pre-Plumb 200 - Connections and Clearances
6.2 CONNECTIONS
Fig. 6.2
MHT Heat pump flow RHT Heat pump return MZ1 Main zone 1 heating circuit flow MZ2 Zone 2 heating circuit return (optional - remove blanking cap) RZ1 Main zone 1 heating circuit return RZ2 Zone 2 heating circuit return (optional - remove blanking cap) CW Cold water in HW Hot water out
762
860
209
620
165
100
560
760
100
100
78 217 772
352
MZ2
MZ1
MHT
RHT
RZ1
RZ2
HW
CW
8

Alpha Pre-Plumb 200 - Connections and Clearances
6.3 CLEARANCES REQUIRED
Fig. 6.3
200 200
50
250
9

7 ELECTRICAL CONNECTION
Alpha Pre-Plumb 200 - Electrical Connections
7.1 ELECTRICAL CONNECTION
The manufacturer declines any responsibility for damage or physical injury caused by failure to connect
the indoor unit to an efficient earthing system or failure to comply with the IEC reference standards.
The pre-plumbed cylinder unit has IPX4D degree of protection - electrical safety of the appliance is achieved only when it is
connected to an earthing circuit as specified by current safety standards.
Remove the screws securing the front control panel cover to access the electrical connections
Follow the electrical connection diagrams in Section 17 for connection details.
Connect a dedicated power supply to the pre-plumbed cylinder using 2.5 mm² flexible heat resistant cable.
Connect the BUS communication cable from the outside heat pump using 0.75 mm² twin core cable.
Where the cable run is close to power cables or other cables, shielded type cable is recommended.
Connect the thermostat controls according to the control type. Refer to the relevant wiring diagram in Section17.
The power supply cable must be connected to a 230V ±10% / 50Hz mains supply respecting
L-N polarity and earth connection, this network must also have a multi-pole circuit breaker with
class III overvoltage category in compliance with installation regulations.
To protect from possible dispersions of DC voltage, it is necessary to provide a type A differential safety device.
If the power cable is damaged, contact a qualified company (e.g. the Authorised Technical Assistance Centre) for
its replacement to avoid a hazard.
It is recommended to contact a qualified company (e.g. the Authorised After-Sales Technical Assistance Centre) for
replacement to avoid a hazard.
The power cable must be connected as shown (Fig. 17.3 or 17.4).
If the fuses on the circuit boards need to be replaced, this must also be done by a qualified person, use a F3.15A H250V
fuse on the PCB.
For the main power supply to the appliance, never use adapters, multiple sockets or extension leads.
Make the various electrical connections according to your needs (Section 17).
Outdoor unit electrical connection
The indoor unit must be coupled to an outdoor unit by connecting terminals F1 and F2 as shown in the wiring diagrams
(Figs. 17.5 and 17.6). The indoor unit is powered at 230 V, regardless of the outdoor unit.
Configure the indoor unit parameters as indicated in paragraph (Section 14).
7.2 EXTERNAL TEMPERATURE PROBE (OPTIONAL)
The outdoor unit has a standard external probe that can be used as an external probe of the heat pump.
If the outdoor unit is positioned in an area that is not suitable for temperature reading, it is advisable to use an additional
external probe (Fig. 7.1) which is available as an optional kit.
Refer to the relative instruction sheet for positioning of the external probe.
For the proper operation of the optional probe it must be connected and then it must be enabled (Parameter R01).
Once the probe is enabled, switch the appliance off and back on.
10

Alpha Pre-Plumb 200 - Electrical Connections
The presence of the external probe allows the system flow temperature to be set automatically based on the outdoor
temperature.
The system flow temperature is determined by the setting on the 'Heat regulation' menu and by the 'User' menu for the offset
values based on the curves shown in Fig. 7.2.
If the system is divided into two or three zones, the flow temperature is calculated based on the zone with the
higher temperature in central heating mode.
The electric connection of the external probe must be made on terminals 38 and 39 on the terminal board on the indoor unit
control panel.
The outdoor temperature is automatically detected by the external probe on the outdoor unit with the unit powered back on
and the parameter R01 set to IU..
45
31
58
Fig. 7.1
7.3 OPERATING LIMITS
The system was designed to work in a specific range of temperatures and at a specific maximum flow temperature. The
charts (Fig. 7.2) shows these limits.
Heat pump
operating limits in CH mode
Fig. 7.2
TE = External temperature
TM = Flow temperature
TB = Storage tank temperature
A = With integration electrical resistance (optional)
B = DHW
DHW mode operating limits
A
B
TE (°C)
TM (°C)
65
50
40
20
035100-20-25
TE (°C)
65
TB (°C)
55
35
10
0
-30 0-25 -5 35 46 60
10
60
B
A
11

Alpha Pre-Plumb 200 - Safety Discharge
8 SAFETY DISCHARGE
It is a requirement of Building Regulation G3 that any discharge from an unvented system is conveyed
to where it is visible, but will not cause danger to persons in or about the building. The tundish and
discharge pipes should be fitted in accordance with the requirements and guidance notes of Building
Regulation G3. The G3 Requirements and Guidance section 3.50 - 3.63 are reproduced in the
following sections of this manual. For discharge pipe arrangements not covered by G3 Guidance advice should be sought
from your local Building Control Officer. Any discharge pipe connected to the pressure relief devices (Expansion Valve and
Temperature/Pressure Relief Valve) must be installed in a continuously downward direction and in a frost free environment.
Water may drip from the discharge pipe of the pressure relief device. This pipe must be left open to the atmosphere. The
pressure relief device is to be operated regularly to remove lime deposits and to verify that it is not blocked.
8.1 G3 REQUIREMENT
''...there shall be precautions...to ensure that the hot water discharged from safety devices is safely conveyed to where it is
visible but will not cause danger to persons in or about the building."
Notes:
Discharge pipe-work D2 can now be a plastic pipe but only pipes that have been tested to a minimum 110 °C must be used,
Discharge pipe D2 can now be plumbed into the soil stack but only soil stacks that can handle temperatures of 99 °C or
greater should be used.
The following extract is taken from the latest G3 Regulations.
Discharge pipe D1
3.50 Safety devices such as temperature relief valves or combined temperature and pressure and pressure relief valves (see
paragraphs 3.13 or 3.18) should discharge either directly or by way of a manifold via a short length of metal pipe (Dl ) to a
tundish.
3.51 The diameter of discharge pipe (Dl) should be not less than the nominal outlet size of the safety device, e.g.
temperature relief valve.
3.52 Where a manifold is used it should be sized to accept and discharge the total discharge form the discharge pipes
connected to it.
3 53 Where valves other than the temperature and pressure relief valve from a single unvented hot water system discharge
by way of the same manifold that is used by the safety devices, the manifold should be factory fitted as part of the hot water
storage system unit or package.
Tundish
3.54 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 valve, with no more than 600 mm of pipe between the valve outlet and the tundish
(Fig. 8.1 & Table).
Note: To comply with the Water Supply (Water Fittings) Regulations, the tundish should incorporate a suitable air gap.
3.55 Any discharge should be visible at the tundish. In addition, where discharges from safety devices may not be apparent,
e.g. in dwellings occupied by 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.
Discharge pipe D2
3.56 The discharge pipe (D2) from the tundish should:
(a) have a vertical section of pipe at least 300 mm long below the tundish before any elbows or bends in the pipework (see
Diagram 1, G3), (Fig. 8, page 21); and
(b) be installed with a continuous fall thereafter of at least 1 in 200.
3.57 The discharge pipe (D2) should be made of:
(a) metal; or
(b) other material that has been demonstrated to be capable of safely withstanding temperatures of the water discharged
and is clearly and permanently marked to identify the product and performance standard (e.g. as specified in the relevant
part of BS 7291-1:2006 Thermostatic pipes and fittings for hot and cold water for domestic purposes and heating installations
in buildings, General requirements).
3.58 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 9 m long, i.e. for discharge pipes between 9 and 18 m
the equivalent resistance length should be at least two sizes larger than the nominal outlet size of the safety device; between
18 and 27 m at least 3 sizes larger, and so on; bends must be taken into account in calculating the flow resistance.
12

Fig. 8.1
Alpha Pre-Plumb 200 - Safety Discharge
Sizing of copper discharge pipe D2 for common temperature relief valve outlet sizes from G3 requirements.
Valve outlet size Minimum size of
discharge pipe D1
Minimum size of
discharge pipe D2
from tundish
Maximum resistance
allowed, expressed
as a length of straight
pipe (i.e. no elbows or
bends)
Resistance created by
each elbow or bend
G 1/2 15 mm 22 mm
28 mm
35 mm
Up to 9 m
Up to 18 m
Up to 27 m
0.8 m
1.0 m
1.4 m
G 3/4 22 mm 28 mm
35 mm
42 mm
Up to 9 m
Up to 18 m
Up to 27 m
1.0 m
1.4 m
1.7 m
G 1 28 mm 35 mm
42 mm
54 mm
Up to 9 m
Up to 18 m
Up to 27 m
1.4 m
1.7 m
2.3 m
300 mm
minimum
600 mm maximum
Tundish
Safety device
(e.g. temperature
relief valve) Metal discharge pipe (D1) from
temperature relief valve
Discharge pipe (D2 from tundish,
with continuous fall. See Building
Regulation G3 section 3.56,
Table 4 and worked example)
Discharge below
fixed grating
(Building Regulation
G£ section 3.61 gives
alternative points
of discharge)
Fixed grating
Trapped
gully
Note: The above table is based on copper tube. Plastic pipes may be of different bore and resistance. Sizes and maximum
lengths of plastic should be calculated using data prepared for the type of pipe being used.
Fig. 7.1 shows a typical discharge pipe arrangement (extract from the latest Building Regulation G3 Guidance section 3.5)8
13

9 HEAT PUMP PRIMARY CIRCUIT
Alpha Pre-Plumb 200 - Heat Pump Primary Circuit
Fig. 9.1
AC Hot water outlet AF Cold mains inlet AV Automatic air vent BY Optional by-pass (≥ 0.6 bar) CV Cold inlet isolation valve (not supplied) DC Drain cocks DE Domestic water expansion vessel DI Domestic water immersion heater DS Domestic water sensor EL Back up electric immersion (optional) FL Filling loop FM Flow meter HE Heating expansion vessel - To be supplied
separatly according to system volume
AC
AF
RZ2
RZ1
MZ1
MZ2
AV HZ
PR
FM
PU
MG
DC
BY
HE
VL
EL
DI
OS
TP
DE
TD
FL
DC
SG
CV
HZ Hot water zone valve MG Inline filter (28 mm) MZ1 Main zone 1 heating circuit flow MZ2 Zone 2 heating circuit return (optional - remove blanking cap) PR Primary pressure relief valve PU System pump RZ1 Main zone 1 heating circuit return RZ2 Zone 2 heating circuit return (optional - remove blanking cap) SG Inlet safety group TD Tundish TP Temperature and pressure relief valve VL Circuit volume buffer (optional)
14

10 PUMP PERFORMANCE
Alpha Pre-Plumb 200 - Pump Performance
10.1 CIRCULATION PUMP
The appliance is supplied with a variable speed pump which operates as follows:
Fixed ('A 05' = 0): The pump speed is fixed and corresponds to parameter 'A 04'.
∆T constant ('A 05' = 5 K): The pump speed varies to maintain the ∆T = 5K constant between the system flow and return
Also, you can adjust the pump operating range, by setting the maximum speed 'A 04' and the minimum speed 'A 03'.
For proper system operation, make sure that the minimum flow rate in operating conditions never drops below
500 l/h.
Fig. 10.1
10.2 PRE-PLUMBED WITH HYDRO 5-8 PUMP PERFORMANCE
0
10
20
30
40
50
60
70
80
90
100
110
120
130
0
20
40
60
80
100
120
140
160
180
200
Pump Power Consumption - W
Available Head - kPa
FlowRate - l/h
Pre-Plumbed 5-8 Prev. ZN1 (pdc UI+UE) -PWM 100%
Pre-Plumbed 5-8 Prev. ZN1 (pdc UI+UE) -PWM 70%
SET 100%
SET 70%
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000
10.3 PRE-PLUMBED WITH HYDRO 12-16 PUMP PERFORMANCE
Fig. 10.2
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000
0
20
40
60
80
100
120
140
160
180
200
0
10
20
30
40
50
60
70
80
90
100
110
120
130
Pump power consumption - W
Available Head - kPa
Pre-Plumbed 12-16 Prev. ZN1 (pdc UI+UE) -PWM 100%
Pre-Plumbed 12-16 Prev. ZN1 (pdc UI+UE) -PWM 70%
SET 100%
SET 70%
FlowRate - l/h
15

11 COMMISSIONG
Alpha Pre-Plumb 200 - Commissioning
At the time of commissioning, please ensure a Commissioning Checklist is completed for the installation.
11.1 Installation Checks
• The heat pump is positioned correctly with the required clearances and within permitted development rules.
• The heat pump is installed using suitable insulated flexible connection hoses (28 mm – 1").
• System flushed and Glycol (Anti-Freeze) with Inhibitor added at the correct concentration.
• Primary expansion vessel is fitted for the required volume of the system (1 Litre expansion for every 10 L of system volume).
• In-line filter connected to the return of the heat pump (28 mm filter must be used).
• Insulation fitted to all external pipes and internal cylinder pipes and connections.
• System has been correctly set and commissioned.
• Customer has been shown on the system operation.
• All safety valves are connected according to the G3 unvented requirements.
• There is an open circuit in the heating system (radiator without TRV) and a system bypass fitted.
• The heating system has a minimum of 30 L water content (If not a volumizer is required).
• A building heat loss has been established and correctly sized emitters for the flow temperature are installed.
• The heat pump is correctly supported on anti-vibration mounts.
• The heat pump is positioned to allow easy access for service and maintenance.
11.2 FILLING THE UNIT WITH WATER
Before filling check and tighten all mechanical joints and connections in case these have loosened during transit.
• Check expansion vessel pre-charge pressure. The vessel is supplied pre-charged to 2.5 bar to match the control
pressure of the pressure reducing valve, The pre-charge pressure is checked using a car tyre gauge by unscrewing the
plastic cap opposite the water connection
• Check all connections for tightness including the immersion heater.
• Ensure the drain cock is CLOSED.
• Open a hot tap furthest from the cylinder.
• Open the cylinder isolating valve to fill the unit. When water flows from the tap,allow it to run for a few minutes to
thoroughly flush through any residue, dirt or swarf, then close the tap.
• Open successive hot taps to purge the system of air.
• Make sure the cylinder and system are filled and vented before switching on the power supply.
11.3 SYSTEM CHECKS
• Check all water connections for leaks and rectify as necessary.
• Turn off the water supply to the cylinder.
• Manually open, for a few seconds, each relief valve in turn, checking that water is discharged and runs freely through
the tundish and out at the discharge point.
• Ensure that the valve(s) re-seat satisfactorily.
11.4 PRIMARY CIRCUIT
Fill the primary circuit following the Air Source Heat Pump commissioning instructions. Vent any trapped air and, if necessary,
re-pressurise the system. After removing the air, check the primary system for leaks and rectify as necessary. Thoroughly
cleanse the primary pipework to remove any debris, solder, fluxes, etc. using a suitable chemical cleansing agent. Flush the
system to remove the chemical cleanser. Add a combined inhibitor and anti-freeze solution to prevent damage to the pipework
and system components. A corrosion inhibitor should always be used. When using chemical cleansers and inhibitors always
follow the manufacturer’s instructions and ensure the product is appropriate for the materials used in the water circuit.
Switch on the electrical supply to the Air Source Heat Pump and cylinder. Programme the Air Source Heat Pump controller
as detailed in Sections 12 and 13. Set the controller for hot water operation only. After a short delay the primary pump on the
return to the Heat Pump should run and the Heat Pump operate. The temperature of the primary flow to the cylinder should
increase, if it does not, check for a wiring or piping error.
Allow the unit to heat up.
Select the heating only function on the controller.The primary pump should run and the Heat Pump operates.The primary flow to
the cylinder primary pipe work manifold and the radiator circuit should become hot, if it does not check for a wiring or piping error.
The recommended minimum hot water setting is 40 °C and the maximum hot water setting is 60 °C. In hard water areas a
maximum of 50 °C is recommended.
When the heating and hot water temperatures are reached, the pumps should stop running and the Heat Pump stop operating.
Check that no water is discharged from either the expansion valve or temperature and pressure relief valve during the
heating cycle. lf the user temperatures or 'On' and 'Off' times have been adjusted for commissioning purposes, the controller
should be reset to the desired settings.
The operation of the controller should be demonstrated to the user and the controller installation and user instructions left
with them for future reference.
16

11.5 TEMPERATURE CONTROL SETTING
By setting the parameters in the 'Heat regulation' menu, you can adjust how the system operates.
The curves (Fig. 11.1 and 11.2) show the default settings in the various operating modes available both with external probe
and without.
These parameters must be set according to the building heat loss design.
Flow temperature in central heating mode
with external probe
(default setting - recommended)
Flow temperature in central heating mode
without external probe
(not recommended)
Fig 11.1 Fig 11.2
TM (°C)
TE (°C)
55
50
45
40
35
30
25
20
-10 -5 0510 15 20 25 30 35
R04
R05
R02 R03
U03
1
TM (°C)
TE (°C)
-10 -5 0510 15 20 25 30 35
55
50
45
40
35
30
60
Z1
Alpha Pre-Plumb 200 - Commissioning
11.6 SETTING THE HEAT PUMP FOR HEATING AND HOT WATER
Heat pumps operate most efficiently when maintaining a steady temperature. Turning a heat pump off when the property is
unoccupied or at night can use more energy than leaving it on. It is recommended to have a set back temperature during the
night and when the property is unoccupied.
A typical set back temperature for the property should be 16 °C with a comfort temperature of around 19 °C.
It is also recommended to time the hot water heating during periods when comfort heating is not essential to enable the heat
pump to heat the hot water cylinder without interruption to heating.
Therefore, during the day when the property is empty or during the night are the recommended times to heat the hot water.
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12.1 GENERAL RECOMMENDATIONS
Alpha Pre-Plumb 200 - Instructions For Use
Never expose the indoor unit to direct vapours from a hob.
The device can be used by children at least 8 years old as well as by persons with reduced physical, sensory or
mental capabilities, or lack of experience or required knowledge, provided that they are under surveillance, or after
they have been instructed relating to the safe use and have understood the potential dangers.
Children must not play with the appliance.
Cleaning and maintenance destined to be performed by the user can not be carried out by unsupervised children.
If temporary shutdown of the indoor unit is required, proceed as follows:
a) drain the heating system if antifreeze is not used.
b) shut off the electrical and water supply.
Never clean the appliance or connected parts with easily flammable substances.
Never leave containers or flammable substances in the same environment as the appliance.
Do not open or tamper with the appliance.
Do not climb on the appliance, do not use the appliance as a support base.
Only use the user interface devices listed in this section of the booklet.
The use of components involving use of electrical power requires some fundamental rules to be observed such as:
Do not touch the appliance with wet or moist parts of the body.
Do not touch when barefoot.
Never pull electrical cables or leave the appliance exposed to atmospheric agents (rain, sunlight, etc.).
The appliance power cable must not be replaced by the user.
In the event of damage to the cable, switch off the appliance and contact exclusively qualified staff for replacement.
If the appliance is not to be used for a certain period, disconnect the main indoor unit external switch.
Water at a temperature of more than 50 °C can cause serious burns.
Always check the water temperature before any use.
The temperatures indicated by the display have a tolerance of +/- 3°C due to environmental conditions that cannot
be blamed on the indoor unit.
At the end of its service life, the appliance must not be disposed of like normal household waste nor abandoned in
the environment, but must be removed by a professionally authorised company as required by current legislation.
Contact the manufacturer for disposal instructions.
12 INSTRUCTIONS FOR USE
18

To preserve the integrity of the system and keep the safety features, performance and reliability, unchanged over
time, you must complete maintenance operations on a yearly basis in compliance with the instructions given in
Section 14 'Maintenance and Checks', in compliance with national, regional, or local standards in force.
Alpha Pre-Plumb 200 - Instructions For Use
12.2 CLEANING AND MAINTENANCE
12.3 CONTROL PANEL
1 - Operating mode (Winter - Summer - Stand-by - Off)
and parameter confirm button
2 - Menu selection button
3 - Reset and exit menu button
4 - Domestic hot water temperature selection buttons
5 - Heating system temperature selection buttons
6 - Primary unit pressure gauge (located on cylinder
manifold)
7 - Remote control connection (optional)
8 - Outdoor unit in operation
9 - Not used on this model
10 - Dispensed output level
11 - Operation with external temperature probe active
(optional)
Fig. 12.1
12 - Connection to other Alpha units
13 - Central heating mode function active
14 - Temperature indicator, indoor unit info and error
codes
15 - Operation in winter mode
16 - Operation in summer mode
17 - Stand-by mode
18 - Not used on this model
19 - Blocked indoor unit, it needs to be unblocked by
pressing the 'RESET' button
20 - DHW production phase operating mode active
45
6
321
78910 11 12
20
19 18 17 16 15
13
14
RESET MENU MODE
OKESC
bar
19

Alpha Pre-Plumb 200 - Instructions For Use
12.4 SYSTEM USE - Refer to Figs. 12.1 to 12.3 as necessary for item numbers and symbol
• Press the button (item 1) until the display switches on. The system now goes back to the state prior to switch-off. (During
start up, the display shows in sequence: display segments all lit, parameter A011, parameter A013).
• If the indoor unit is in stand-by, press the button (item 1) again to activate it. If this is not the case, go to the next point.
• Then press the button (item 1) in sequence and set the system to summer , winter .
Summer
In this mode, the system only works to produce domestic hot water, the temperature is set using the buttons (item 4) and the
corresponding temperature is shown on the display by the indicator (item 14).
Before operation, make sure the system is full of water, checking that the pressure gauge needle (item 6) points
to a value between 1 and 1.2 bar and make sure that the heat pump circuit has been filled as described in the
outdoor unit instructions booklet.
Winter
In this mode, the system works both to product domestic how water and room central heating.
The temperature of the DHW is always regulated via buttons (item 4), the central heating temperature is regulated via
buttons (item 5) and the relative temperature is shown on the display by the indicator (item 14).
Fig. 12.2
Fig. 12.3
RESET MENU MODE
OKESC
RESET MENU MODE
OKESC
Operation with external probe
The system is set up to use the outdoor unit external probe or an optional external probe.
With the external probe connected, the system flow temperature for room heating is managed by the external probe based
on the outdoor temperature measured.
You can change the flow temperature by choosing the offset value in the specific user menu.
Summer and DHW heating in progress mode
Winter and central heating in progress mode
20