Armstrong 3760 Pro Series User manual

Installation and
operating
instructions
3760 Pro & Midi Range
Pressurisation Equipment
3760 Pro 1LP/1MP/1HP/
2LP/2MP/2HP models
3760 Midi 1LP/1MP/2LP/2MP
models
File No: 37.206
Date: july 10, 2023
Supersedes: new
Date: new

contents
Pressures in a sealed system 4
About this Manual 5
Conventions used in this Manual 5
Typography 5
Equipment Overview 6
Principal of Operation 6
Installation 7
Pipe Connections 7
Typical Installation Diagram 8
Flow Restrictors (Midi Models Only) 9
Electrical Power Supply 12
Micro Controller 13
Fault contacts 13
Commissioning 14
Pre-Commissioning Checklist 14
Controller Overview 15
Controller Programming 16
Program Parameter List 17
Hydraulic Commissioning 18
1. Float valve setting 18
2. Bleeding Pumps 18
3. Forcing Pumps to Run 20
4. Initial Start-up 21
5. Testing 21
Operation 22
Fault Codes 22
Shutdown procedure 23
Start-up Procedure 23
Maintenance 24
Visual Inspection 24
Interrogate Controller 24
Test Unit Operation 24
Check Float Valve Operation 25
Check Float Switch Operation 25
Check Break Tank Water Condition 25
Check Strainer 25
Check Expansion Vessel Pre-Charge 25
Troubleshooting 27
Warranty Details 30
Warranty - What Is Covered? 30
Warranty - What Is Not Covered? 30
Conditions of warranty 30
Contact Details 30
Statement of compliance 31

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
4
Safety Relief Valve Setting
Maximum Working Pressure High Pressure Alarm
Low Pressure Alarm
Cold Fill Pressure
Expansion Vessel & Pressurisation Unit Location
Static Pressure (Static Height)
Above Expansion Vessel & Pressurisation Unit
10m = 1 bar
Sealed System Expansion Vessel Working Limits
Dierential Venting Allowance
Topup Pump Stop
Topup Pump Start
Pressures in a sealed system
Below is an overview of how the settings on a pressurisation unit must be considered for normal operation. Close,
conflicting or overlapping settings will cause system instability and nuisance alarm conditions. If in any doubt please
seek advice from a Sealed System professional.
A typical venting allowance is 0.3 bar, added to the static height to give the cold fill pressure.
The Dierential setting represents the allowable pressure loss before the pump activates and restores the cold fill
pressure. The Dierential setting must not be greater than the system venting allowance. This will ensure that the
system remains fully flooded during normal topup conditions.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
5
About this Manual
This Operation and Maintenance Manual contains all the necessary information to install, commission, operate and
maintain 3760 Midi & Pro pressurisation equipment.
It is recommended to read all parts of this manual before undertaking any work on the equipment.
Conventions used in this Manual
This manual makes use of symbols to identify key pieces of information. Please take note of the following symbols
and their meaning:
DANGER – Important safety related information intended to prevent injury and/or damage to the
equipment, system or property.
CAUTION - Important information intended to prevent damage to the equipment, system or property.
IMPORTANT - Important information intended to ensure that the equipment functions correctly.
USEFUL – Useful information which may be helpful, but is not necessarily required for the unit to
function correctly.
Typography
This manual makes use of dierent typography to identify dierent types of information.
Italics Key words and phrases
(Round Brackets) Used to identify a button on the digital controller
[Square Brackets] A parameter on the digital controller
<Inequality Symbols> A message/fault code displayed on the digital controller
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 8 / 48
About this Manual
This Operation and Maintenance Manual contains all the necessary information to install, commission, operate
and maintain the Flamco Prestige equipment.
It is recommended to read all parts of this manual before undertaking any work on the equipment.
Conventions used in this Manual
This manual makes use of symbols to identify key pieces of information. Please take note of the following
symbols and their meaning:
DANGER –Important safety related information intended to prevent injury and/or damage to the
equipment, system or property.
CAUTION - Important information intended to prevent damage to the equipment, system or
property.
IMPORTANT - Important information intended to ensure that the equipment functions correctly.
USEFUL –Useful information which may be helpful, but is not necessarily required for the unit to
function correctly.
Typography
This manual makes use of different typography to identify different types of information.
Italics Key words and phrases
(Round Brackets) Used to identify a button on the digital controller
[Square Brackets] A parameter on the digital controller
<Inequality Symbols> A message/fault code displayed on the digital controller
Where to find more Information
For further information please visit the Flamco Limited Website at the following URL:
www.flamco.co.uk
Alternatively, please contact the Flamco Limited office using the details below:
Phone: [phone]
Fax: [phone]
Email: [e-mail] OR [e-mail]

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
6
Equipment Overview
The function of this pressurisation unit is to provide a means of automated water top-up to sealed heating and
cooling systems. The equipment is designed to provide periodic water top-up to compensate for minor losses in
system pressure (e.g. slow leaks, air venting, etc.).
This equipment is not designed to cope with sudden losses of system pressure (e.g. manual draining)
or major water losses (e.g. large leaks). The equipment is also not intended to be used for water
boosting applications.
Principal of Operation
The following schematic shows the internal arrangement of a pressurisation unit:
The pressurisation unit is fitted with a break tank (1) which is filled from the mains water supply (2) via a float
operated valve (3). The break tank is fitted with a warning overflow (4) in case the break tank overfills, and a weir
overflow (5) as the primary backflow protection.
The pressurisation unit is connected into the heating system (6) via an isolation valve (7).
The pressure sensor (8) monitors the system pressure.
If the pressure sensor detects a drop in pressure, the pump (9a) will pump water from the break tank into the
system. Once the required pressure has been reached, the pump will stop.
On twin pump models, a second pump (9b) is provided. The two pumps will run in a duty/standby/automatic
changeover configuration (i.e. the active pump will alternate with each pump start).
The pump(s) are fitted with non-return valves (10a, 10b) to prevent backflow.
A drain valve (11) is provided for draining down the unit and for commissioning purposes.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 8 / 44

The function of this pressurisation unit is to provide a means of automated water top-up to sealed heating and
cooling systems. The equipment is designed to provide periodic water top-up to compensate for minor losses in
system pressure (e.g. slow leaks, air venting, etc.).
This equipment is not designed to cope with sudden losses of system pressure (e.g. manual
draining) or major water losses (e.g. large leaks). The equipment is also not intended to be used
for water boosting applications.
Principal of Operation
The following schematic shows the internal arrangement of a pressurisation unit:
The pressurisation unit is fitted with a break tank (1) which is filled from the mains water supply (2) via a float
operated valve (3). The break tank is fitted with a warning overflow (4) in case the break tank overfills, and a
weir overflow (5) as the primary backflow protection.
The pressurisation unit is connected into the heating system (6) via an isolation valve (7).
The pressure sensor (8) monitors the system pressure.
If the pressure sensor detects a drop in pressure, the pump (9a) will pump water from the break tank into the
system. Once the required pressure has been reached, the pump will stop.
On twin pump models, a second pump (9b) is provided. The two pumps will run in a duty/standby/automatic
changeover configuration (i.e. the active pump will alternate with each pump start).
The pump(s) are fitted with non-return valves (10a, 10b) to prevent backflow.
A drain valve (11) is provided for draining down the unit and for commissioning purposes.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 9 / 48
Equipment Overview
The function of this pressurisation unit is to provide a means of automated water top-up to sealed heating and
cooling systems. The equipment is designed to provide periodic water top-up to compensate for minor losses in
system pressure (e.g. slow leaks, air venting, etc.).
This equipment is not designed to cope with sudden losses of system pressure (e.g. manual
draining) or major water losses (e.g. large leaks). The equipment is also not intended to be used
for water boosting applications.
Principal of Operation
The following schematic shows the internal arrangement of a pressurisation unit:
The PressDS Plus unit is fitted with a break tank (1) which is filled from the mains water supply (2) via a
float operated valve (3). The break tank is fitted with an overflow (4) in case the break tank overfills, and a
weir overflow (5) in case the primary overflow fails. Also fitted is an additive tank (14). Additive tank is
filled with either Additive or additive, to add to the system a required mixture is required. To do this two
balancing valves are placed after each of the tanks to control the mixture water (12) and Additive (13).
(See mixture table)
Water is allowed into the Vacuum cylinder through a safety solenoid (18b), a pressure reducing valve (17)
and a special variable bypass valve (16).

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
7
Installation
This pressurisation unit is not designed to be installed in an outdoor environment. The unit must be
installed in a frost free environment, away from precipitation and water sprays/jets. If there is a risk of
flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed / sited
where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of the
pressurisation unit. The conditions at the point of connection to the system must not exceed these
values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before connection to
the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape. If PTFE tape is
used, care must be taken to ensure that the tape does not obstruct the orifice of the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure sensor
from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same point,
to provide a neutral pressure reading. This point of connection should be in the system return, on the
suction side of the circulation pump.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 11 / 48
Installation
This equipment is not designed to be installed in an outdoor environment. The unit must be
installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a
risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Connections to the return header of the system must be made in the horizontal plane, to prevent
system borne debris entering the equipment. Where 2 connections are required to the system
return header, they must join the header at 2 distinctly separate points at least 500 mm apart
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 11 / 48
Installation
This equipment is not designed to be installed in an outdoor environment. The unit must be
installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a
risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Connections to the return header of the system must be made in the horizontal plane, to prevent
system borne debris entering the equipment. Where 2 connections are required to the system
return header, they must join the header at 2 distinctly separate points at least 500 mm apart
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 11 / 48
Installation
This equipment is not designed to be installed in an outdoor environment. The unit must be
installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a
risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Connections to the return header of the system must be made in the horizontal plane, to prevent
system borne debris entering the equipment. Where 2 connections are required to the system
return header, they must join the header at 2 distinctly separate points at least 500 mm apart
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 11 / 48
Installation
This equipment is not designed to be installed in an outdoor environment. The unit must be
installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a
risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Connections to the return header of the system must be made in the horizontal plane, to prevent
system borne debris entering the equipment. Where 2 connections are required to the system
return header, they must join the header at 2 distinctly separate points at least 500 mm apart
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 11 / 48
Installation
This equipment is not designed to be installed in an outdoor environment. The unit must be
installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a
risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Connections to the return header of the system must be made in the horizontal plane, to prevent
system borne debris entering the equipment. Where 2 connections are required to the system
return header, they must join the header at 2 distinctly separate points at least 500 mm apart
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 11 / 48
Installation
This equipment is not designed to be installed in an outdoor environment. The unit must be
installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a
risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Connections to the return header of the system must be made in the horizontal plane, to prevent
system borne debris entering the equipment. Where 2 connections are required to the system
return header, they must join the header at 2 distinctly separate points at least 500 mm apart
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 11 / 48
Installation
This equipment is not designed to be installed in an outdoor environment. The unit must be
installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a
risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Connections to the return header of the system must be made in the horizontal plane, to prevent
system borne debris entering the equipment. Where 2 connections are required to the system
return header, they must join the header at 2 distinctly separate points at least 500 mm apart

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
8
© 2023 aalberts hydronic flow control
. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Page 10 / 40
Installation
This pressurisation unit is not designed to be installed in an outdoor environment. The unit must
be installed in a frost free environment, away from precipitation and water sprays/jets. If there is
a risk of flooding, the unit must be installed on a raised plinth.
The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed /
sited where damage to the local environs can occur on water egress
Please refer to the appropriate datasheet for the maximum working pressure and temperature of
the pressurisation unit. The conditions at the point of connection to the system must not exceed
these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the orifice of
the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed between the
pressurisation unit and the heating/cooling system. These devices will prevent the pressure
sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the same
point, to provide a neutral pressure reading. This point of connection should be in the system
return, on the suction side of the circulation pump.
Typical Installation Diagram
Typical Installation Diagram
Top fill vessels
Expansion Vessel
Mains Water Feed
Isolation Valve
System Return Drain Valve
Drain
Isolation Valve
Pressurisation
Unit
MAINS WATER
OVERFLOW
SYSTEM
Tundish
= Filling Loop (Optional)
Automatic Air Vent (AAV)
Bottom fill vessels

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
9
Flow Restrictors (Midi Models Only)
Pressurisation equipment fitted with a plastic, side-entry torbeck valve must be fitted with a filter and
– depending on the mains water pressure – a flow restrictor. Failure to do this may result in damage to
the equipment.
Two dierent flow restrictors are supplied with the equipment, both of which include an integral filter. The selection
of the appropriate flow restrictor is based on the maximum mains water pressure at the point of installation. Please
refer to the following table for selection.
If no restrictor is required, the filter must be removed from one of the restrictors and installed on its own. The
following diagram shows how to remove the filter:
To install the flow restrictor/filter, hold it by the tab and push it into the opening of the float valve connection, as
shown in the diagram below:
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 10 / 44
ȋƬȌ
Pressurisation equipment fitted with a plastic, side-entry torbeck valve must be fitted with a filter
and –depending on the mains water pressure –a flow restrictor. Failure to do this may result in
damage to the equipment.
Two different flow restrictors are supplied with the equipment, both of which include an integral filter. The
selection of the appropriate flow restrictor is based on the maximum mains water pressure at the point of
installation. Please refer to the following table for selection.
Mains Water Pressure
Requirement
Below 1 Bar
No Restrictor. Install Filter Only
1 –4 Bar
Low Pressure Restrictor (coloured)
Above 4 Bar
High Pressure Restrictor (white)
If no restrictor is required, the filter must be removed from one of the restrictors and installed on its own. The
following diagram shows how to remove the filter:
To install the flow restrictor/filter, hold it by the tab and push it into the opening of the float valve connection,
as shown in the diagram below:
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 12 / 52
ȋȌ
Pressurisation equipment fitted with a plastic, side-entry torbeck valve must be fitted with a filter
and –depending on the mains water pressure –a flow restrictor. Failure to do this may result in
damage to the equipment.
Two different flow restrictors are supplied with the equipment, both of which include an integral filter.
The selection of the appropriate flow restrictor is based on the maximum mains water pressure at the
point of installation. Please refer to the following table for selection.
Mains Water Pressure
Requirement
Below 1 Bar
No Restrictor. Install Filter Only
1 –4 Bar
Low Pressure Restrictor (coloured)
Above 4 Bar
High Pressure Restrictor (white)
If no restrictor is required, the filter must be removed from one of the restrictors and installed on its own. The
following diagram shows how to remove the filter:
To install the flow restrictor/filter, hold it by the tab and push it into the opening of the float valve connection,
as shown in the diagram below:
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 10 / 44
ȋƬȌ
Pressurisation equipment fitted with a plastic, side-entry torbeck valve must be fitted with a filter
and –depending on the mains water pressure –a flow restrictor. Failure to do this may result in
damage to the equipment.
Two different flow restrictors are supplied with the equipment, both of which include an integral filter. The
selection of the appropriate flow restrictor is based on the maximum mains water pressure at the point of
installation. Please refer to the following table for selection.
Mains Water Pressure
Requirement
Below 1 Bar
No Restrictor. Install Filter Only
1 –4 Bar
Low Pressure Restrictor (coloured)
Above 4 Bar
High Pressure Restrictor (white)
If no restrictor is required, the filter must be removed from one of the restrictors and installed on its own. The
following diagram shows how to remove the filter:
To install the flow restrictor/filter, hold it by the tab and push it into the opening of the float valve connection,
as shown in the diagram below:
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 10 / 44
ȋƬȌ
Pressurisation equipment fitted with a plastic, side-entry torbeck valve must be fitted with a filter
and –depending on the mains water pressure –a flow restrictor. Failure to do this may result in
damage to the equipment.
Two different flow restrictors are supplied with the equipment, both of which include an integral filter. The
selection of the appropriate flow restrictor is based on the maximum mains water pressure at the point of
installation. Please refer to the following table for selection.
Mains Water Pressure
Requirement
Below 1 Bar
No Restrictor. Install Filter Only
1 –4 Bar
Low Pressure Restrictor (coloured)
Above 4 Bar
High Pressure Restrictor (white)
If no restrictor is required, the filter must be removed from one of the restrictors and installed on its own. The
following diagram shows how to remove the filter:
To install the flow restrictor/filter, hold it by the tab and push it into the opening of the float valve connection,
as shown in the diagram below:

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
10
3760 Pro range Clearance and Connection Requirements – Floor standing
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 11 / 44
–
Connection
Size
Notes
Mains
Water Feed ½” BSP M
An isolation valve must be
installed on the mains water feed
for servicing.
Break Tank
Overflow 22 mm
Guidance on drainage
requirements should be obtained
from the local water authority.
System
Connection
½” BSP M
/ 15mm
The pressurisation unit and
expansion vessel should be
connected to the system at the
same point.
The point of connection should
be in the system return, on the
suction side of the circulation
pump.
Non-return valves, pressure
reducing valves and RPZ valves
must not be used.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
11
3760 Midi models Clearance and Connection Requirements – Wall mounted
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 12 / 44
Ƭ–
Connection
Size
Notes
Mains
Water Feed ½” BSP M
An isolation valve must be
installed on the mains water
feed for servicing.
Break Tank
Overflow 22 mm
Guidance on drainage
requirements should be
obtained from the local water
authority.
System
Connection
½” BSP M
/ 15mm
The pressurisation unit and
expansion vessel should be
connected to the system at the
same point.
The point of connection should
be in the system return, on the
suction side of the circulation
pump.
Non-return valves, pressure
reducing valves and RPZ valves
must not be used.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
12
Electrical Power Supply
This equipment must be electrically isolated before removing the covers. Cables connected to the volt
free contacts may be supplied from another source and may remain live after the unit is isolated. These
must be isolated elsewhere.
All electrical connections must be carried out by a suitably qualified and competent person.
The mains power supply to the pressurisation unit must be connected into the fused terminal block as shown below:
On some larger models, the fused terminal block is replaced by a fused spur. If this is the case, the power supply
must be connected into the fused spur, as shown below:
It is recommended to supply power to the pressurisation unit via a lockable isolator. This should be
installed within 2 m of the equipment.
This equipment can be damaged by the high voltages produced by electrical installation testing
equipment. When performing electrical installation tests, the equipment must be isolated from the
supply.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 13 / 44

This equipment must be electrically isolated before removing the covers. Cables connected to the
volt free contacts may be supplied from another source and may remain live after the unit is
isolated. These must be isolated elsewhere.
All electrical connections must be carried out by a suitably qualified and competent person.
The mains power supply to the pressurisation unit must be connected into the fused terminal block as shown
below:
On some larger models, the fused terminal block is replaced by a fused spur. If this is the case, the power supply
must be connected into the fused spur, as shown below:
It is recommended to supply power to the pressurisation unit via a lockable isolator. This should
be installed within 2 m of the equipment.
This equipment can be damaged by the high voltages produced by electrical installation testing
equipment. When performing electrical installation tests, the equipment must be isolated from
the supply.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 13 / 44

This equipment must be electrically isolated before removing the covers. Cables connected to the
volt free contacts may be supplied from another source and may remain live after the unit is
isolated. These must be isolated elsewhere.
All electrical connections must be carried out by a suitably qualified and competent person.
The mains power supply to the pressurisation unit must be connected into the fused terminal block as shown
below:
On some larger models, the fused terminal block is replaced by a fused spur. If this is the case, the power supply
must be connected into the fused spur, as shown below:
It is recommended to supply power to the pressurisation unit via a lockable isolator. This should
be installed within 2 m of the equipment.
This equipment can be damaged by the high voltages produced by electrical installation testing
equipment. When performing electrical installation tests, the equipment must be isolated from
the supply.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 2.0 Aug-18 Page 11 / 40

This equipment must be electrically isolated before removing the covers. Cables connected to the
volt free contacts may be supplied from another source and may remain live after the unit is
isolated. These must be isolated elsewhere.
All electrical connections must be carried out by a suitably qualified and competent person.
The mains power supply to the pressurisation unit must be connected into the fused terminal block as shown
below:
On some larger models, the fused terminal block is replaced by a fused spur. If this is the case, the power supply
must be connected into the fused spur, as shown below:
It is recommended to supply power to the pressurisation unit via a lockable isolator. This should
be installed within 2 m of the equipment.
This equipment can be damaged by the high voltages produced by electrical installation testing
equipment. When performing electrical installation tests, the equipment must be isolated from
the supply.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 2.0 Aug-18 Page 11 / 40

This equipment must be electrically isolated before removing the covers. Cables connected to the
volt free contacts may be supplied from another source and may remain live after the unit is
isolated. These must be isolated elsewhere.
All electrical connections must be carried out by a suitably qualified and competent person.
The mains power supply to the pressurisation unit must be connected into the fused terminal block as shown
below:
On some larger models, the fused terminal block is replaced by a fused spur. If this is the case, the power supply
must be connected into the fused spur, as shown below:
It is recommended to supply power to the pressurisation unit via a lockable isolator. This should
be installed within 2 m of the equipment.
This equipment can be damaged by the high voltages produced by electrical installation testing
equipment. When performing electrical installation tests, the equipment must be isolated from
the supply.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 2.0 Aug-18 Page 11 / 40

This equipment must be electrically isolated before removing the covers. Cables connected to the
volt free contacts may be supplied from another source and may remain live after the unit is
isolated. These must be isolated elsewhere.
All electrical connections must be carried out by a suitably qualified and competent person.
The mains power supply to the pressurisation unit must be connected into the fused terminal block as shown
below:
On some larger models, the fused terminal block is replaced by a fused spur. If this is the case, the power supply
must be connected into the fused spur, as shown below:
It is recommended to supply power to the pressurisation unit via a lockable isolator. This should
be installed within 2 m of the equipment.
This equipment can be damaged by the high voltages produced by electrical installation testing
equipment. When performing electrical installation tests, the equipment must be isolated from
the supply.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
13
Micro Controller
Fault contacts
There are 6 volt free fault contacts which can be used for connection to a BMS system, located on terminals 1-12 on
the digital controller.
With the exception of the Common Alarm, it is possible to convert all other fault contacts to normally
closed. For further information please refer to the commissioning section of this manual.
The other volt free contacts can be connected to the BMS and when the alarm is triggered this is
shown on the Pressurisation unit and the BMS.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 14 / 44


There are 6 volt free fault contacts which can be used for connection to a BMS system, located on terminals 1-
12 on the digital controller.
With the exception of the Common Alarm, it is possible to convert all other fault contacts to
normally closed. For further information please refer to the commissioning section of this manual.
The other volt free contacts can be connected to the BMS and when the alarm is triggered this is
shown on the Pressurisation unit and the BMS.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 15 / 48
Micro Controller
Fault contacts
There are 6 volt free fault contacts which can be used for connection to a BMS system, located on terminals 1-
12 on the digital controller.
With the exception of the Common Alarm, it is possible to convert all other fault contacts to
normally closed. For further information please refer to the commissioning section of this manual.
The other volt free contacts can be connected to the BMS and when the alarm is triggered this is
shown on the Pressurisation unit and the BMS.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
14
Commissioning
It is highly recommended to have this equipment commissioned by an Armstrong approved engineer. Any
damage or loss incurred through incorrect commissioning by an unapproved engineer will not be covered
by the warranty.
Pre-Commissioning Checklist
The following conditions must be met before starting the commissioning process. Failure to meet these
conditions may result in injury or damage to the equipment, system and property.
Equipment is sited in a frost free area, away from precipitation and water sprays/jets
All necessary pipe/electrical connections have been made to a satisfactory standard
The temperature and pressure at the point of connection are within the operating limits of the pressurisation unit.
The heating/cooling system is fitted with a safety valve and expansion vessel
The following conditions must be met for the pressurisation unit and heating/cooling system to function
correctly. If these conditions have not been met, it is not advisable to proceed with the commissioning
process.
The system connection has been made into the system return header / pump suction
There are no non-return valves, pressure reducing valves or RPZ valves installed between the pressurisation unit
and the heating/cooling system
The expansion vessel is pre-charged to the correct pressure (equal to PU cold fill pressure)
It is advisable to fill the heating/cooling system prior to commissioning. If this is not possible, the
pressurisation unit can be used to fill the system after commissioning (Not possible with Midi Units).
Depending on the size of the system, this may take a considerable amount of time.
The heating/cooling system is filled and pressurised to the required cold fill pressure, with the water at ambient
temperature (approximately).
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 16 / 48
Commissioning
It is highly recommended to have this equipment commissioned by a Flamco approved engineer.
Any damage or loss incurred through incorrect commissioning by an unapproved engineer will not
be covered by the warranty.
Pre-Commissioning Checklist
The following conditions must be met before starting the commissioning process. Failure to meet
these conditions may result in injury or damage to the equipment, system and property.
Equipment is sited in a frost-free area, away from precipitation and water sprays/jets
All necessary pipe/electrical connections have been made to a satisfactory standard
The temperature and pressure at the point of connection are within the operating limits of the
pressurisation unit.
The heating/cooling system is fitted with a safety valve and expansion vessel
The following conditions must be met for the pressurisation unit and heating/cooling system to
function correctly. If these conditions have not been met, it is not advisable to proceed with the
commissioning process.
The system connection has been made into the system return header / pump suction
There are no non-return valves, pressure reducing valves or RPZ valves installed between the
pressurisation unit and the heating/cooling system
The expansion vessel is pre-charged to the correct pressure (equal to PU cold fill pressure)
It is advisable to fill the heating/cooling system prior to commissioning. If this is not possible, the
pressurisation unit can be used to fill the system after commissioning (Not possible with Mini
Units). Depending on the size of the system, this may take a considerable amount of time.
The heating/cooling system is filled and pressurised to the required cold fill pressure, with the water at
ambient temperature (approximately).
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 16 / 48
Commissioning
It is highly recommended to have this equipment commissioned by a Flamco approved engineer.
Any damage or loss incurred through incorrect commissioning by an unapproved engineer will not
be covered by the warranty.
Pre-Commissioning Checklist
The following conditions must be met before starting the commissioning process. Failure to meet
these conditions may result in injury or damage to the equipment, system and property.
Equipment is sited in a frost-free area, away from precipitation and water sprays/jets
All necessary pipe/electrical connections have been made to a satisfactory standard
The temperature and pressure at the point of connection are within the operating limits of the
pressurisation unit.
The heating/cooling system is fitted with a safety valve and expansion vessel
The following conditions must be met for the pressurisation unit and heating/cooling system to
function correctly. If these conditions have not been met, it is not advisable to proceed with the
commissioning process.
The system connection has been made into the system return header / pump suction
There are no non-return valves, pressure reducing valves or RPZ valves installed between the
pressurisation unit and the heating/cooling system
The expansion vessel is pre-charged to the correct pressure (equal to PU cold fill pressure)
It is advisable to fill the heating/cooling system prior to commissioning. If this is not possible, the
pressurisation unit can be used to fill the system after commissioning (Not possible with Mini
Units). Depending on the size of the system, this may take a considerable amount of time.
The heating/cooling system is filled and pressurised to the required cold fill pressure, with the water at
ambient temperature (approximately).
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 16 / 48
Commissioning
It is highly recommended to have this equipment commissioned by a Flamco approved engineer.
Any damage or loss incurred through incorrect commissioning by an unapproved engineer will not
be covered by the warranty.
Pre-Commissioning Checklist
The following conditions must be met before starting the commissioning process. Failure to meet
these conditions may result in injury or damage to the equipment, system and property.
Equipment is sited in a frost-free area, away from precipitation and water sprays/jets
All necessary pipe/electrical connections have been made to a satisfactory standard
The temperature and pressure at the point of connection are within the operating limits of the
pressurisation unit.
The heating/cooling system is fitted with a safety valve and expansion vessel
The following conditions must be met for the pressurisation unit and heating/cooling system to
function correctly. If these conditions have not been met, it is not advisable to proceed with the
commissioning process.
The system connection has been made into the system return header / pump suction
There are no non-return valves, pressure reducing valves or RPZ valves installed between the
pressurisation unit and the heating/cooling system
The expansion vessel is pre-charged to the correct pressure (equal to PU cold fill pressure)
It is advisable to fill the heating/cooling system prior to commissioning. If this is not possible, the
pressurisation unit can be used to fill the system after commissioning (Not possible with Mini
Units). Depending on the size of the system, this may take a considerable amount of time.
The heating/cooling system is filled and pressurised to the required cold fill pressure, with the water at
ambient temperature (approximately).
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 16 / 48
Commissioning
It is highly recommended to have this equipment commissioned by a Flamco approved engineer.
Any damage or loss incurred through incorrect commissioning by an unapproved engineer will not
be covered by the warranty.
Pre-Commissioning Checklist
The following conditions must be met before starting the commissioning process. Failure to meet
these conditions may result in injury or damage to the equipment, system and property.
Equipment is sited in a frost-free area, away from precipitation and water sprays/jets
All necessary pipe/electrical connections have been made to a satisfactory standard
The temperature and pressure at the point of connection are within the operating limits of the
pressurisation unit.
The heating/cooling system is fitted with a safety valve and expansion vessel
The following conditions must be met for the pressurisation unit and heating/cooling system to
function correctly. If these conditions have not been met, it is not advisable to proceed with the
commissioning process.
The system connection has been made into the system return header / pump suction
There are no non-return valves, pressure reducing valves or RPZ valves installed between the
pressurisation unit and the heating/cooling system
The expansion vessel is pre-charged to the correct pressure (equal to PU cold fill pressure)
It is advisable to fill the heating/cooling system prior to commissioning. If this is not possible, the
pressurisation unit can be used to fill the system after commissioning (Not possible with Mini
Units). Depending on the size of the system, this may take a considerable amount of time.
The heating/cooling system is filled and pressurised to the required cold fill pressure, with the water at
ambient temperature (approximately).

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
15
Controller Overview
The following image shows the front of the pressurisation unit digital controller. 4 buttons are provided for
programming, and an LED display which shows scrolling messages.
When the controller is first powered up, it will display the controller version number. This manual
relates to controller version >10.0. If the controller is of a dierent version, there may be dierences in
the menu items available.
When in normal operation, the controller will display the current system pressure. If a fault occurs, the controller will
display a fault code and produce an audible alarm.
In normal operation, the functions of the buttons are as follows:
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 16 / 44

The following image shows the front of the pressurisation unit digital controller. 4 buttons are provided for
programming, and an LED display which shows scrolling messages.
When the controller is first powered up, it will display the controller version number. This manual
relates to controller version >10.0. If the controller is of a different version, there may be
differences in the menu items available.
When in normal operation, the controller will display the current system pressure. If a fault occurs, the
controller will display a fault code and produce an audible alarm.
In normal operation, the functions of the buttons are as follows:
Button
Function
Press
Hold
SET
-
Show Current System Pressure
MUTE
Mute Audible Alarm
Reset Unit
+
-
Enter Programming Menu
-
-
Enter Programming Menu
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 16 / 44

The following image shows the front of the pressurisation unit digital controller. 4 buttons are provided for
programming, and an LED display which shows scrolling messages.
When the controller is first powered up, it will display the controller version number. This manual
relates to controller version >10.0. If the controller is of a different version, there may be
differences in the menu items available.
When in normal operation, the controller will display the current system pressure. If a fault occurs, the
controller will display a fault code and produce an audible alarm.
In normal operation, the functions of the buttons are as follows:
Button
Function
Press
Hold
SET
-
Show Current System Pressure
MUTE
Mute Audible Alarm
Reset Unit
+
-
Enter Programming Menu
-
-
Enter Programming Menu
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 16 / 48
Commissioning
It is highly recommended to have this equipment commissioned by a Flamco approved engineer.
Any damage or loss incurred through incorrect commissioning by an unapproved engineer will not
be covered by the warranty.
Pre-Commissioning Checklist
The following conditions must be met before starting the commissioning process. Failure to meet
these conditions may result in injury or damage to the equipment, system and property.
Equipment is sited in a frost-free area, away from precipitation and water sprays/jets
All necessary pipe/electrical connections have been made to a satisfactory standard
The temperature and pressure at the point of connection are within the operating limits of the
pressurisation unit.
The heating/cooling system is fitted with a safety valve and expansion vessel
The following conditions must be met for the pressurisation unit and heating/cooling system to
function correctly. If these conditions have not been met, it is not advisable to proceed with the
commissioning process.
The system connection has been made into the system return header / pump suction
There are no non-return valves, pressure reducing valves or RPZ valves installed between the
pressurisation unit and the heating/cooling system
The expansion vessel is pre-charged to the correct pressure (equal to PU cold fill pressure)
It is advisable to fill the heating/cooling system prior to commissioning. If this is not possible, the
pressurisation unit can be used to fill the system after commissioning (Not possible with Mini
Units). Depending on the size of the system, this may take a considerable amount of time.
The heating/cooling system is filled and pressurised to the required cold fill pressure, with the water at
ambient temperature (approximately).

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
16
Controller Programming
Do not alter any settings without first understanding the implications of doing so. Incorrect settings
may cause damage to the equipment, wider system or property.
To enter the programming menu, hold the (+) button until “enter code” appears on the screen, followed by “9999”
with a flashing cursor after the first digit.
To gain access to the programming menu, the following code must be entered:
Standard Code Standard set of options 2601
To enter the code, change the first digit with the (+) and (-) buttons, then press (SET) to move onto the next digit.
Repeat for all digits, then once the correct code is shown on the display, press (SET) to enter the programming
menu.
Once a correct code has been entered, the first option PR00 – Language will appear select E and then press and hold
(SET) & (+) to move to next menu.
Once in the menu, the value of the current menu item can be changed using the (+) and (-) buttons. Once the
current value has been set, pressing the (SET) & (+) buttons together to move to the next option or (SET) & (-)
buttons together to move back an option is you made an error.
Once the programming is complete press and hold the (SET) button for few seconds to save the settings.
If the controller loses power while in the programming menu, all changes made up to that point will
be erased. To confirm all changes, the end of the menu must be reached, and press and hold the (SET)
button for few seconds to save the settings
Key:
(SET) & (+) = Move to next menu
(SET) & (-) = Move back to pervious next menu
Hold down (SET) = Hold (SET) button down for few seconds saves the menu
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 18 / 48
Controller Programming
Do not alter any settings without first understanding the implications of doing so. Incorrect
settings may cause damage to the equipment, wider system or property.
To enter the programming menu, hold the (+) button until “enter code” appears on the screen, followed by
“9999” with a flashing cursor after the first digit.
To gain access to the programming menu, one of the following codes must be entered:
Standard Code
Standard set of options
2601
Engineer Code
Full set of options
4706
To enter the code, change the first digit with the (+) and (-) buttons, then press (SET) to move onto the next
digit. Repeat for all digits, then once the correct code is shown on the display, press (SET) to enter the
programming menu.
Once a correct code has been entered, the first option PR00 –Language will appear select E and then press and
hold (SET) & (+) to move to next menu.
Once in the menu, the value of the current menu item can be changed using the (+) and (-) buttons. Once the
current value has been set, pressing the (SET) & (+) buttons together to move to the next option or (SET) & (-)
buttons together to move back an option is you made an error.
Once the programming is complete press and hold the (SET) button for few seconds to save the settings.
If the controller loses power while in the programming menu, all changes made up to that point
will be erased. To confirm all changes, the end of the menu must be reached, and press and hold
the (SET) button for few seconds to save the settings
Key:
(SET) & (+) = Move to next menu
(SET) & (-) = Move back to pervious next menu
Hold down (SET) = Hold (SET) button down for few seconds saves the menu
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 18 / 48
Controller Programming
Do not alter any settings without first understanding the implications of doing so. Incorrect
settings may cause damage to the equipment, wider system or property.
To enter the programming menu, hold the (+) button until “enter code” appears on the screen, followed by
“9999” with a flashing cursor after the first digit.
To gain access to the programming menu, one of the following codes must be entered:
Standard Code
Standard set of options
2601
Engineer Code
Full set of options
4706
To enter the code, change the first digit with the (+) and (-) buttons, then press (SET) to move onto the next
digit. Repeat for all digits, then once the correct code is shown on the display, press (SET) to enter the
programming menu.
Once a correct code has been entered, the first option PR00 –Language will appear select E and then press and
hold (SET) & (+) to move to next menu.
Once in the menu, the value of the current menu item can be changed using the (+) and (-) buttons. Once the
current value has been set, pressing the (SET) & (+) buttons together to move to the next option or (SET) & (-)
buttons together to move back an option is you made an error.
Once the programming is complete press and hold the (SET) button for few seconds to save the settings.
If the controller loses power while in the programming menu, all changes made up to that point
will be erased. To confirm all changes, the end of the menu must be reached, and press and hold
the (SET) button for few seconds to save the settings
Key:
(SET) & (+) = Move to next menu
(SET) & (-) = Move back to pervious next menu
Hold down (SET) = Hold (SET) button down for few seconds saves the menu

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
17
Program Parameter List
The table below gives details of all menu items, in the order that they will appear:
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 18 / 44

The table below gives details of all menu items, in the order that they will appear:
PR No
Customer Code - 2601
Notes
Default
Unit
0 Language
E=English I=Italian D=Deutsch F=French
N=Netherland
E
2
Low Pressure Alarm
0.5 bar less than Fill Pressure
0.5
Bar
STANDARD OPTION
3
Low Pressure Warning
0.6 Bar less than Fill Pressure
0.6
Bar
4
Differential
‘cut-in’ and ‘cut-out’ between pumps
0.2
Bar
5 Fill Pressure
System pressure + 0.3 venting
allowance
1
Bar
6
High Pressure Warning
High pressure alarm –0.1 Bar
2.6
Bar
7
High Pressure Alarm
System safety valve - 10%
2.7
Bar
8
Flood Limit
10
minutes
9
Excessive Start Quantity
0
10
Excessive Start Time
8
hours
28
Fill system
N
45
Service Reminder Y/N
N
48
ID Number
MODBUS ID number
1
49
Review Logs
N
50 (*)
Counter for P1 used for Topup
51 (*)
Hours Run for P1 Topup
52 (*)
Counter for P2 used for Topup
53 (*)
Hours Run for P2 Topup
54 (*)
Total Hours run P1 (inc Degassing)
55 (*)
Total Hours run P2 (inc Degassing)
56 (*)
Alarm Counter
57 (*)
Power interrupted counter
(*)
IF REVIEW LOG IS YES THENPR NUMBER 50 - 57 WILL BE ACTIVE
This menu only brings up standard option for the pressurisation equipment, to set up the degasser option of the
equipment then you need to put in 4706 code and follow the menu list on the next pages.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
18
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 21 / 44

ͳǤ 
Ensure that the break tank float valve is set to its lowest position:
Pro Units Midi Units
If a drain valve is fitted to the break tank, ensure that it is closed. Then, turn on the mains water supply and
allow the break tank to fill.
When the float valve operates for the first time, it may not close immediately, causing the break
tank to overfill. Once the internals of the valve have been fully wetted this should not occur again.
ʹǤ 
This step is only necessary for Pro PU / PUm / PDm units.
Make sure that the internal isolation valve within the pressurisation unit is closed. Failure to do
this may cause injury or damage to the equipment, system or property.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 21 / 44

ͳǤ 
Ensure that the break tank float valve is set to its lowest position:
Pro Units Midi Units
If a drain valve is fitted to the break tank, ensure that it is closed. Then, turn on the mains water supply and
allow the break tank to fill.
When the float valve operates for the first time, it may not close immediately, causing the break
tank to overfill. Once the internals of the valve have been fully wetted this should not occur again.
ʹǤ 
This step is only necessary for Pro PU / PUm / PDm units.
Make sure that the internal isolation valve within the pressurisation unit is closed. Failure to do
this may cause injury or damage to the equipment, system or property.
Hydraulic Commissioning
1. Float valve setting
Ensure that the break tank float valve is set to its lowest position:
If a drain valve is fitted to the break tank, ensure that it is closed. Then, turn on the mains water supply and allow the
break tank to fill.
When the float valve operates for the first time, it may not close immediately, causing the break tank
to overfill. Once the internals of the valve have been fully wetted this should not occur again.
2. Bleeding Pumps
This step is only necessary for Pro & Midi units.
Make sure that the internal isolation valve within the pressurisation unit is closed. Failure to do this
may cause injury or damage to the equipment, system or property.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 23 / 48
Hydraulic Commissioning
1. Float valve setting
Ensure that the break tank float valve is set to its lowest position:
If a drain valve is fitted to the break tank, ensure that it is closed. Then, turn on the mains water supply and
allow the break tank to fill.
When the float valve operates for the first time, it may not close immediately, causing the break
tank to overfill. Once the internals of the valve have been fully wetted this should not occur again.
2. Bleeding Pumps 
Make sure that the internal isolation valve (combined equipment only) within the pressurisation
unit is closed by following the steps below. Failure to do this may cause injury or damage to the
equipment, system or property.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 23 / 48
Hydraulic Commissioning
1. Float valve setting
Ensure that the break tank float valve is set to its lowest position:
If a drain valve is fitted to the break tank, ensure that it is closed. Then, turn on the mains water supply and
allow the break tank to fill.
When the float valve operates for the first time, it may not close immediately, causing the break
tank to overfill. Once the internals of the valve have been fully wetted this should not occur again.
2. Bleeding Pumps 
Make sure that the internal isolation valve (combined equipment only) within the pressurisation
unit is closed by following the steps below. Failure to do this may cause injury or damage to the
equipment, system or property.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
19
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 22 / 44
Locate the bleed screw on the pump. The following diagrams show examples of typical bleed screw locations for
most pumps:
Do not use excessive force when tightening the bleed screw as this may damage the pump casing.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 22 / 44
Locate the bleed screw on the pump. The following diagrams show examples of typical bleed screw locations for
most pumps:
Do not use excessive force when tightening the bleed screw as this may damage the pump casing.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 24 / 48
Attach a length of hose to the drain and open the valve to the system. Remember to close valve once this is
completed
Locate the bleed screw on the pump. The following diagrams show examples of typical bleed screw locations for
most pumps:
Do not use excessive force when tightening the bleed screw as this may damage the pump casing.
Locate the bleed screw on the pump. The following diagrams show examples of typical bleed screw locations for
most pumps:
Do not use excessive force when tightening the bleed screw as this may damage the pump casing.

installation &
operating instructions
3760 Pro & Midi Range
Pressurisation Equipment
20
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Errors and omissions excepted.
Rev 1.0 Aug-18 Page 23 / 44
If the pump has a plastic bleed screw like the one shown below, do not use excessive force or
attempt to use any tools to turn it as this may damage the pump casing. Turn the plastic cap ¼
Anti-clockwise and lift the plug above the gap. Once water slip out push back cap by ¼ turn
clockwise.
͵Ǥ
Turn on the power supply to the digital controller and wait for the system pressure to appear on
the display. Then, enter the code 2601, Language menu will appear as default [E]. Press and hold
(MUTE) & (+) for pump 1 to run and Press and hold (MUTE) & (-) for pump 2 to run
Key: (MUTE) & (+) = Pump 1 Run
(MUTE) & (-) = Pump 2 Run
To bleed the pumps, the pumps must be started. Then while the pump is running, the bleed screw
must be opened until all the air has been removed and only water is being discharged. The bleed
screw can then be closed.
Failure to bleed the pumps may result in damage to the equipment, system and property.
After bleeding the pumps, close the drain valve and remove the hose from the hose tail
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 25 / 48
If the pump has a plastic bleed screw like the one shown below, do not use excessive force or
attempt to use any tools to turn it as this may irreparably damage the pump casing.
͵Ǥ
Turn on the power supply to the digital controller and wait for the system pressure to appear on
the display. Then, enter the code 2601, Language menu will appear as default [E]. Press and hold
(MUTE) & (+) for pump 1 to run and Press and hold (MUTE) & (-) for pump 2 to run
To bleed the pumps, the pumps must be started. Then while the pump is running, the bleed screw
must be opened until all the air has been removed and only water is being discharged. The bleed
screw can then be closed.
Failure to bleed the pumps may result in damage to the equipment, system and property.
After bleeding the pumps, close the drain valve and remove the hose from the hose tail.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 25 / 48
If the pump has a plastic bleed screw like the one shown below, do not use excessive force or
attempt to use any tools to turn it as this may irreparably damage the pump casing.
͵Ǥ
Turn on the power supply to the digital controller and wait for the system pressure to appear on
the display. Then, enter the code 2601, Language menu will appear as default [E]. Press and hold
(MUTE) & (+) for pump 1 to run and Press and hold (MUTE) & (-) for pump 2 to run
To bleed the pumps, the pumps must be started. Then while the pump is running, the bleed screw
must be opened until all the air has been removed and only water is being discharged. The bleed
screw can then be closed.
Failure to bleed the pumps may result in damage to the equipment, system and property.
After bleeding the pumps, close the drain valve and remove the hose from the hose tail.
© 2018 Flamco group. All rights reserved.
We reserve the right to change designs and technical specifications of our products.
Rev 1.0 Aug-18 Page 25 / 48
If the pump has a plastic bleed screw like the one shown below, do not use excessive force or
attempt to use any tools to turn it as this may irreparably damage the pump casing.
͵Ǥ
Turn on the power supply to the digital controller and wait for the system pressure to appear on
the display. Then, enter the code 2601, Language menu will appear as default [E]. Press and hold
(MUTE) & (+) for pump 1 to run and Press and hold (MUTE) & (-) for pump 2 to run
To bleed the pumps, the pumps must be started. Then while the pump is running, the bleed screw
must be opened until all the air has been removed and only water is being discharged. The bleed
screw can then be closed.
Failure to bleed the pumps may result in damage to the equipment, system and property.
After bleeding the pumps, close the drain valve and remove the hose from the hose tail.
3. Forcing Pumps to Run
Turn on the power supply to the digital controller and wait for the system pressure to appear on the
display. Then, enter the code 2601, Language menu will appear as default [E]. Press and hold (MUTE)
& (+) for pump 1 to run and Press and hold (MUTE) & (-) for pump 2 to run
Key: (MUTE) & (+) = Pump 1 Run
(MUTE) & (-) = Pump 2 Run
To bleed the pumps, the pumps must be started. Then while the pump is running, the bleed screw
must be opened until all the air has been removed and only water is being discharged. The bleed screw
can then be closed.
Failure to bleed the pumps may result in damage to the equipment, system and property.
After bleeding the pumps, close the drain valve and remove the hose from the hose tail
If the pump has a plastic bleed screw like the one shown below, do not use excessive force or attempt
to use any tools to turn it as this may damage the pump casing. Turn the plastic cap ¼ Anti-clockwise
and lift the plug above the gap. Once water slip out push back cap by ¼ turn clockwise.