Mira Mira 1.5 User manual

1
Mira 1.5 bar Twin Ended Pump
Mira 2.0 bar Twin Ended Pump
These instructions must be left with the user
Installation and User Guide

2
WARNING!
1. Products manufactured by us are safe and risk free, provided that they are
installed, used and maintained in good working order, in accordance with our
instructions and recommendations.
2. Children should be supervised to make sure that they do not play with the
appliance.
3. This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning
the use of the appliance by a person responsible for their safety.
4. Isolate the electrical and water supplies before commencing installation. The
electricity must be turned off at the mains and the appropriate circuit fuse
removed, if applicable.
5. THIS APPLIANCE MUST BE EARTHED. MAKE SURE SUPPLEMENTARY
BONDING COMPLIES WITH THE "REQUIREMENTS FOR ELECTRICAL
INSTALLATIONS" BS 7671.
6. This appliance is intended to be permanently connected to the xed electrical
wiring of the mains system.
7. This appliance must be provided with means for disconnection that is
incorporated into the xed wiring in accordance with the relevant local wiring
regulations.
8. A separate, permanently connected supply to the appliance must be through
a double-pole switch, which has at least 3 mm contact separation.
9. Make sure all electrical connections are tight, to prevent overheating.
10. DO NOT switch on the electrical supply until the plumbing has been completed.
11. DO NOT switch on if there is a possibility that the water in the appliance is
frozen. Allow the appliance to thaw and check for leaks before using.
12. DO NOT operate this appliance if water leaks from the unit.
13. In the interests of electrical safety, a 30 mA Residual Current Device (RCD) is
recommended as part of the electrical circuit. This may be part of the consumer
unit or a separate unit.
14. The supply cable is not designed to be replaced. If the supply cable is damaged
contact Mira Customer Services department for guidance.
15. If any of the following conditions occur, isolate the electricity and water supplies
and refer to "To Contact Us", on the back cover of this guide:
15.1. If the pump body or electrical cover is damaged.
15.2. If the appliance begins to make an odd noise, smell or smoke.
15.3. If the appliance shows signs of a distinct change in performance,
indicating a need for maintenance.
15.4. If the appliance is frozen.
IMPORTANT SAFETY INFORMATION

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INTRODUCTION
Thank you for purchasing a quality Mira product. To enjoy the full potential of your
new product, please take time to read this guide thoroughly, having done so, keep
it safe for future reference.
DESCRIPTION
Mira 1.5 bar Twin Ended Pump
Mira 2.0 bar Twin Ended Pump
An electric motor driven twin ended peripheral pump complete with an automatic
control system, consisting of ow switches and electronic controls.
CAUTION!
1. Read all of these instructions and retain this guide for later use.
2. Follow all warnings, cautions and instructions contained on the appliance.
3. DO NOT t the appliance where it may be exposed to freezing conditions.
4. The appliance is not suitable for areas with high humidity (i.e. steam rooms).
5. The electrical installation must comply to "BS 7671 (commonly referred to
as the IEE Wiring Regulations) and all relevant building regulations, or any
particular regulations or practices specied by the local electricity supply
company.
6. The plumbing installation must comply with all national or local water
regulations and all relevant building regulations, or any particular regulation
or practice specied by the local water supply company.
7. To avoid damage to the appliance when soldered ttings are used, pre-solder
the pipework and ttings before connecting them to the exible hoses.
8. To make sure the appliance and supplied ttings are not put under strain
during installation, always provide mechanical support when making plumbing
connections. Upon completion of the installation, make sure the connections
are not under any stress due to misaligned pipework or electrical cables.
9. DO NOT commission this appliance if water leaks from the pump or exible
hoses.
10. DO NOT run the pump dry.
11. There are no serviceable components within this appliance.
12. When this appliance has reached the end of its serviceable life, it should
be disposed of in a safe manner, in accordance with current local authority
recycling, or waste disposal policy.

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APPLICATION
Mira twin ended pumps are designed for pressure boosting applications in vented
stored water systems, inlet pressures to the pump and ambient temperatures must not
exceed the values given in the technical specications. (See "SPECIFICATIONS".)
Storage
If the pump is not to be installed immediately on receipt, make sure that it is stored
in a dry, frost free and vibration free environment in its original packaging.
Guarantee
For domestic installations, Mira Showers guarantee the Mira 1.5 bar Twin Ended
Pump and the Mira 2.0 bar Twin Ended Pump against any defect in materials or
workmanship for a period of two years from the date of purchase.
For Terms and Conditions refer to the back cover of this guide.
Recommended Usage
Domestic ü
Light Commercial û
Heavy Commercial û
Healthcare û
If you experience any difculty with the installation or operation of your new
appliance, then please refer to "FAULT DIAGNOSIS", before contacting Mira
Showers. Our contact details can be found on the back cover of this guide.

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PACK CONTENTS
Check the contents of the pack and tick the appropriate boxes to familiarise
yourself with the part names and to conrm that all parts are included.
ü
1 x Mira 1.5 or 2.0 bar
Twin Ended Pump
(only one supplied)

4 x Flexible Hoses 
4 x Sealing Washers 


Documentation
1 x Installation and User Guide
1 x Customer Support Brochure
Electrical Supply Lead

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DIMENSIONS
231
166
96 132
38
103.5
All dimensions are nominal and in millimetres
Fig. 1
Electrical Supply Lead
1500 mm (1.5 m)

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SPECIFICATIONS
Pump Model 1.5 bar 2.0 bar
Pressures
Minimum Inlet Pressure 5 kPa (0.05 bar) = 0.5 m
Maximum Static Pressure 100 kPa (1 bar) = 10 m
Supply Pressure Differential Nominally Equal
Temperatures
Maximum Water Temperature * 65 °C
Minimum Water Temperature 4 °C
Maximum Ambient Temperature 40 °C
Electrical
Power Supply (Volts/phase frequency) 230 V / 50 Hz
Protection Rating IPX2
Type of Motor Induction
Power Consumption 385 W 420 W
Full Load Current 1.7 A 1.8 A
Rating Int (S3) 30 mins on/30 mins off @ 9 l/min
(Both ends pumping)
Maximum Number of Starts Per Hour 60
* In normal circumstances the temperature of stored water should never exceed
65 °C. A stored water temperature of 60 °C is considered sufcient to meet all normal
requirements and will minimize the build up of scale in hard water areas.
Note:
These specications are to be used in conjunction with the rating label attached to
the pump.

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Mira 1.5 & 2.0 bar Twin Ended Pumps Performance Graph
0
5
10
15
2.0 bar
1.5 bar
20
0 5 10 15 20 25 30 35 40
FLOW (l/min)
HEAD (metres)
0.0
0.5
1.0
1.5
HEAD (bar)

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INSTALLATION
Installation must be carried out in accordance with these instructions, and
must be conducted by designated, qualied and competent personnel.
Pump Location
1. The preferred pump location is at oor level next to the hot water cylinder
or a level that is below the tapping that feeds the pump. This will ensure
access to an air free water supply which is important for the pump to
operate reliably. (See Fig. 2.)
2. The pump must NOT be located where the static inlet pressure is
greater than permitted and within the values given. (See Fig 3 & 4 and
'SPECIFICATIONS' or rating label attached to the pump.)
3. Water pumps can develop leaks and should, therefore, not be located
where seepage may go undetected or cause damage. The pump must
be installed such that it is accessible for servicing or removal. When
servicing or disconnecting, small amounts of water may drain from the
unit and pipework.
4. To allow servicing of this product 4 x full bore servicing valves MUST
be tted close to the exible connections on the inlets and outlets
5. Take care to protect the pump from frost and freezing, particularly when
located in an unheated area.
6. Make sure adequate ventilation is provided (minimum clearance of
80 mm around all sides of the pump). The pump should be installed in
a low dust area.
15 mm Diameter Pipe 22 mm Diameter Pipe
Float Type Automatic Air Vent
(Bottle Valve)
Domestic Hot Water
Shower Handset
Mixing Valve
Servicing Valve
Pressure Accumulator
Pressure Switch
Fixed Shower Head
Check Valve
Float Operated Valve
DHW
Key to symbols used in the system layouts:

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7. The motor casing can become very hot under normal operating
conditions. Make sure the pump cannot be touched during operation. If
installed in an airing cupboard, make sure no fabrics come in contact
with the pump.
8. Location must be DRY and FROST FREE and NOT EXPOSED TO WATER
SPRAY.
9. The pump must be sited as low and as close as possible in relation to
the water source and mounted in a horizontal position with the outlet
connection vertically upwards. The operation of the ow switch will be
impaired in any other position. Do not rigidly secure the pump to the
mounting surface.
10. The pump must have a minimum ooded suction head of 0.5 metres at all
times.
11. The pump must be installed in a positive head position, a gravity ow of
approximately 1.0 l/min is required from the highest outlet. This is normally
achieved with a static head of 100 mm from the base of the header tank to
the highest position of the shower tting. (See Fig. 2.)
System Layout for Mira Twin Ended Pump
Fig. 2
Minimum
1.5 m
with other
simultaneous
hot water
services
Cistern
Warning Pipe
(Overow)
Other Hot Water Services
DHW Pump
30 to 60°
Air Separation Connections
DHW Cylinder
Feed
25 mm
Cold Feed to
Mixing Valve
90°
Minimum 100 mm
Electrical Supply Lead
(1.5 m)
Full bore Isolator valves
MUST be tted to inlets
and outlets

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System Layout for Mira Twin Ended Pump
Fig. 3
Cistern
DHW Pump
Mixing Valve
System Layout for Mira Twin Ended Pump
Fig. 4
DHW Pump
Mixing Valve
Cistern
Max. Inlet Head = 10 m
Max. Inlet Head = 10 m Min. Inlet Head = 0.5 m
Min. Inlet Head = 0.5 m
Full bore Isolator valves
MUST be tted to inlets
and outlets
Full bore Isolator valves
MUST be tted to inlets
and outlets

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DHW
Pump
Unsuitable Layout for Mira Twin Ended Pump
Fig. 5
Cistern
Mixing Valve
Cistern
Unsuitable Layout for Mira Twin Ended Pump
Fig. 6
DHW Pump
Mixing Valve

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Unsuitable Layout for Mira Twin Ended Pump
Fig. 7
Cistern Pump
DHW
Mixing Valve
11. The anti-vibration mounting feet and exible hoses are supplied to reduce
noise transmission, the exible hoses supplied may be bent to an angle of 30º
Max. (See Fig 10.) Make sure that any noise is not amplied through loose
panels, pipework or other xtures and ttings in close proximity.
12. Either end of the pump is suitable for hot or cold water.
13. Do not t a non-return valve in suction line (inlet) pipework to the pump. The
pump must be free to vent to the supply tanks at all times.
14. Avoid long pipe-runs and make sure pipework is adequately sized for the
minimum ow demand.
15. Pipework congurations which can allow air locks to form should be avoided.
For inlet pipework, this should be achieved by utilising pipe-runs with a
continuous fall. For outlet pipework, either provide a continuously rising
pipe-run, or if an "up and over" pipe-run is unavoidable, t a oat type automatic
air vent at the highest point as shown (See Fig 3 & 4).
16. The hot feed from the cylinder must be as illustrated in Fig 2. Side entry cylinder
bosses are not recommended. A drop in cylinder water level could expose a
top entry immersion element. Air in water gathers at the edge of the cylinder,
and in the centre, during the heating process, before travelling up the vent.
17. Care should be taken when using soldering ux. Protect the pump from damage
whilst making soldered connections as some uxes cause damage to plastic
components.
18. All connection pipework must be adequately supported.

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19. Do not rigidly secure pump unit to the mounting surface.
Plumbing - push-in connectors
1. Do not use stainless steel, chrome or nickel plated pipe with the exible
hose push-in plumbing connections.
2. Do not introduce solder ux into the joint or surrounding area as
connectors will be attacked and may fail.
All solder joints should be completed and ux residues removed before
nal connection to push-in connections, on the exible hose.
3. Do not allow contact with oil or cellulose based paints, paint thinners
or strippers, acid based descalents or aggressive cleaning agents.
4. Flush all pipework thoroughly before connecting to the pump.
Fitting the Hose to Pipework
The hoses are tted with plastic push-in connectors, which must only be connected
with the following:
a) 15 mm diameter copper pipe to BS EN 1057 - R250 (half hard) - Table 3.
b) 15 mm plastic pipe to BS 7291 part 1 and part 2 (Table 1), or part 3 (Table 1)
plus internal support sleeve*.
c) Appropriate plumbing tting that provides a leak tight connection.
* The internal bore of the plastic pipe must be supported against collapse with the
pipe manufacturer's recommended support sleeve (pipe insert).
5. Make sure the pipe is free from all scoring marks and deformities in the area
of the insertion depth (see Fig. 8) and cut the pipe square, removing all burrs
and sharp edges to prevent damage to the sealing 'O'-ring.
Pencil Mark
15 mm Pipe
Insertion Depth
31 mm
Nylon Washer
Pipe Stop
'O' Seal
Collet
Hose
Fig. 8

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Pump Fitting
Sealing
Washer
Fig. 9
6. Prior to inserting the pipe, mark the insertion depth with a soft pencil at a
distance of 31 mm from the end to be inserted (see Fig 8).
7. Check in the mouth of the tting that the 'O'-ring, nylon washer and collet are
in position as shown (see Fig. 8).
8. Push the pipe rmly into the tting, until the pencil mark is level with the top
of the collet. At the same time the pipe should hit the internal stop inside the
tting.
9. To release the joint, push pipe rmly into the tting, hold the collet down and
gently remove the pipe. If the system has been lled with water, care should
be taken to isolate the pump and towels used to absorb any spilled water.
10. Make sure that any pipework that could become frozen is properly insulated.
Fitting the Hose to Pump
The pump inlet and outlet ports have factory assembled ttings which are specically
designed for connection to the G ¾ female captive nut on the exible hoses.
The hose end is tted with a rubber sealing washer which is held captive within the
nut assembly.
11. Locate the hose into position and screw the nut fully onto the pump tting by
hand. Use a spanner or appropriate grip tool to make a water tight seal.
Do not overtighten!

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15 mm PIPE
22 mm PIPE
30º Max
22 mm PIPE
Fig. 10
Plumbing Connections
ANTI-VIBRATION FOOT
PUMP BODY
FLEXIBLE HOSES
(Do not kink or twist)

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Electrical
Electrical Connection
The pump is provided with a factory tted supply cord. This must be permanently
connected to the xed wiring of the mains supply. Means of disconnection must
be incorporated in the xed wiring in accordance with the current electrical wiring
regulations. A double poled switched, fuse connection unit is suitable for this purpose.
This switch must comply with BS1363-4, protected with a 5 Amp fuse and should
be mounted in an easily accessible position. The switch should also be labelled,
particularly when located near to any other electrical isolating switches.
1. The electrical installation must comply to "BS 7671 (commonly referred
to as the IEE Wiring Regulations) and all relevant building regulations, or
any particular regulations or practices specied by the local electricity
supply company. The installation must be carried out by a competent
person.
2. In the interests of electrical safety, a 30 mA Residual Current Device
(RCD) is recommended to be installed in the supply circuit. This may
be part of the consumer unit or a separate unit.
3. Before starting work on the electrical installation, make sure the power
supply is isolated.
4. This appliance must be earthed.
5. The motor and wiring must not be exposed to water.
6. Do not allow the supply cord to come in contact with any hot surfaces,
including the motor housing, pump body or pipework. The cord should
be safely routed and secured with suitable cable clips.
Connecting the Supply Lead
7. The wires in the supply lead are coloured in accordance with the following
code:
8. Make sure all electrical connections are tight, to prevent overheating.
GREEN/YELLOW = EARTH ( )
BLUE = NEUTRAL (N)
BROWN = LIVE (L)

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Earthing
9. This appliance must be earthed via the
supply cord, which must be correctly
connected to the earth point located in
the terminal box.
10. Copper or metallic pipework must have
supplementary earth bonding where the
continuity has been broken by exible
hoses or plastic components. Adjacent
suction and delivery pipes should be
tted with earthing clamps to BS 951 and
connected with earthing wire size 4 mm²
(see Fig. 11).
11. Certain installations may require
additional earthing arrangements such as
equipotential bonding. Reference should
be made to the relevant regulations
concerning this subject to make sure of
compliance. Fig. 11

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COMMISSIONING
Commissioning must be carried out in accordance with these instructions, and must
be conducted by designated, qualied and competent personnel.
1. The motor casing can become very hot under normal operating
conditions, care should be taken to make sure it cannot be touched
during operation.
2. The pump chamber must be full of water at all times. Seal damage will
result if the pump is allowed to run dry.
3. Do not operate the pump with any inlet or outlet isolating valves in the
"OFF" position. Damage to the pump will result.
Before commissioning the pump, make sure the following points have been observed
in the installation:
• The plumbing system that feeds the pump has been ushed
thoroughly.
• There is always enough stored water to meet the demand.
• The minimum ow rate required to operate the pump is
always present. (1 litre/min from the highest outlet.)
WARNING! Do Not switch on if there is a possibility that the
water in the appliance is frozen.
4. With the electrical supply isolated, prime the pump by turning on the water
supply. Vent the pump by opening an outlet (e.g. shower control). The pump
will ll with water, check for any leaks around the pump and hose connections.
The pump is primed when water runs from the outlet at gravity pressure.
5. Keeping the outlet open, switch on the power supply to the pump. Pump will
start automatically, allow to run until all the air is purged from the outlet.
6. Check the pump, hoses and pipework for leaks.
7. Turn off the outlet, the pump will stop automatically. Operate the outlet to test
that the pump starts and stops automatically.
8. Check for further leaks when the pump is both running and stationary.
9. If the pump does not operate, repeat the commissioning procedure and refer
to section "Fault Diagnosis".
10. Having completed the installation, make sure that the user is familiar with the
operation of the appliance.

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FAULT DIAGNOSIS
Symptom Cause Rectication
1. Pump does not
start.
(a) No power supply. 1. Check all fuses and RCD. Make
sure power supply is available at
the double pole isolator switch. If
fuse "blows" repeatedly, contact
Mira Customer Service Dept.
Details on the back cover of this
guide.
(b) No/low ow
through outlet
(tap/shower)
1. Clean the shower head and make
sure the ow controls are operating
correctly.
2. Check and clean the inlet filters
(pump and tap/shower). Refer to
outlet manufacturer's installation
instructions.
3. Check the system for air locks and
recommission the pump, refer to
section "Commissioning".
4. Check the isolating valves are fully
open and other restrictions.
5. Check the system has adequate
ow rate for the pump to operate,
refer to section "Installation".
6. The flow switch mechanism is
sticking. Contact Mira Showers (see
back cover) to arrange service visit.
(c) Internal problem. 1. Contact Mira Customer Service
Dept. Details on the back cover of
this guide.
The pump has
started but
stopped within a
short period.
(d) Motor thermal
switch tripped.
1. Allow the motor to cool, up to 1 hour,
refer to symptom 5 (c).
2. The pump
operates
momentarily
when not
required.
(a) Flow-switch
operating due to
water movement
in pipework.
1. Air pocket after pump. Make
sure plumbing complies with
recommended layout (Fig. 2, 3 & 4).
2. Air pocket in the pump supply (hot)
expanding due to system heating.
Correct the pipework layout to
eliminate thermal expansion, t a
single check valve close to and
AFTER PUMP OUTLET, refer to