Armstrong 3760 Pro Series Installation And Operating Instructions Manual
Pressurisation equipment
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Summary of Contents for Armstrong 3760 Pro Series
- Page 1 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...
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Page 3: Table Of Contents
contents Pressures in a sealed system Operation About this Manual Fault Codes Conventions used in this Manual Shutdown procedure Typography Start-up Procedure Equipment Overview Maintenance Principal of Operation Visual Inspection Installation Interrogate Controller Pipe Connections Test Unit Operation Typical Installation Diagram Check Float Valve Operation Flow Restrictors (Midi Models Only) Check Float Switch Operation... -
Page 4: Pressures In A Sealed System
i nstall at ion & 3760 Pro & Midi Range o perat ing in str uct ion s Pressurisation Equipment 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. -
Page 5: About This Manual
3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s About this Manual About this Manual This Operation and Maintenance Manual contains all the necessary information to install, commission, operate and This Operation and Maintenance Manual contains all the necessary information to install, commission, operate maintain 3760 Midi &... -
Page 6: Equipment Overview
insta ll at ion & 3760 Pro & Midi Range o pera t in g in str ucti on s Pressurisation Equipment Equipment Overview Equipment Overview The function of this pressurisation unit is to provide a means of automated water top-up to sealed heating and The function of this pressurisation unit is to provide a means of automated water top-up to sealed heating and The function of this pressurisation unit is to provide a means of automated water top-up to sealed heating and cooling systems. -
Page 7: Installation
Installation This equipment is not designed to be installed in an outdoor environment. The unit must be Installation The unit is equipped with a Category 5 Weir overflow arrangement and must not be installed / installed in a frost-free environment, away from precipitation and water sprays/jets. If there is a sited where damage to the local environs can occur on water egress risk of flooding, the unit must be installed on a raised plinth. -
Page 8: Typical Installation Diagram
es, pressure reducing valves and RPZ valves must not be installed between the nit and the heating/cooling system. These devices will prevent the pressure ding the system pressure. i nstall at ion & 3760 Pro & Midi Range o perat ing in str uct ion s Pressurisation Equipment on unit and expansion vessel should be connected to the system at the same e a neutral pressure reading. -
Page 9: Flow Restrictors (Midi Models Only)
3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s Flow Restrictors (Midi Models Only) Pressurisation equipment fitted with a plastic, side-entry torbeck valve must be fitted with a filter Pressurisation equipment fitted with a plastic, side-entry torbeck valve must be fitted with a filter and –... - Page 10 i nstall at ion & 3760 Pro & Midi Range o perat ing in str uct ion s Pressurisation Equipment – 3760 Pro range Clearance and Connection Requirements – Floor standing Connection Size Notes An isolation valve must be Mains ½”...
- Page 11 3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s – 3760 Midi models Clearance and Connection Requirements – Wall mounted Connection Size Notes...
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Page 12: Electrical Power Supply
insta ll at ion & 3760 Pro & Midi Range o pera t in g in str ucti on s Pressurisation Equipment Electrical Power Supply This equipment must be electrically isolated before removing the covers. Cables connected to the This equipment must be electrically isolated before removing the covers. Cables connected to the volt volt free contacts may be supplied from another source and may remain live after the unit is This equipment must be electrically isolated before removing the covers. -
Page 13: Micro Controller
3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s Micro Controller Micro Controller Fault contacts Fault contacts There are 6 volt free fault contacts which can be used for connection to a BMS system, located on terminals 1- There are 6 volt free fault contacts which can be used for connection to a BMS system, located on terminals 1- There are 6 volt free fault contacts which can be used for connection to a BMS system, located on terminals 1-12 on... -
Page 14: Commissioning
Any damage or loss incurred through incorrect commissioning by an unapproved engineer will not It is highly recommended to have this equipment commissioned by an Armstrong approved engineer. Any It is highly recommended to have this equipment commissioned by a Flamco approved engineer. -
Page 15: Controller Overview
All necessary pipe/electrical connections have been made to a satisfactory standard 3760 Pro & Midi Range i nsta l l a t i o n & The temperature and pressure at the point of connection are within the operating limits of the Pressurisation Equipment o p er at i n g i n str u cti o n s pressurisation unit. -
Page 16: Controller Programming
i nstall at ion & 3760 Pro & Midi Range o perat ing in str uct ion s Pressurisation Equipment Controller Programming Controller Programming Controller Programming Do not alter any settings without first understanding the implications of doing so. Incorrect Do not alter any settings without first understanding the implications of doing so. -
Page 17: Program Parameter List
3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s Program Parameter List The table below gives details of all menu items, in the order that they will appear: The table below gives details of all menu items, in the order that they will appear: PR No Customer Code - 2601... -
Page 18: Hydraulic Commissioning
insta ll at ion & 3760 Pro & Midi Range o pera t in g in str ucti on s Pressurisation Equipment Hydraulic Commissioning Hydraulic Commissioning 1. Float valve setting Hydraulic Commissioning 1. Float valve setting Ensure that the break tank float valve is set to its lowest position: Ensure that the break tank float valve is set to its lowest position: Ensure that the break tank float valve is set to its lowest position: Ensure that the break tank float valve is set to its lowest position:... - Page 19 3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s 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.
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Page 20: Forcing Pumps To Run 2
insta ll at ion & 3760 Pro & Midi Range o pera t in g in str ucti on s Pressurisation Equipment If the pump has a plastic bleed screw like the one shown below, do not use excessive force or 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. -
Page 21: Initial Start-Up
3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s 5. Testing 4. Initial Start-up To test the operation of the pressurisation unit while connected to the system, the system pressure must be lowered slowly to simulate a minor leak. -
Page 22: Operation
insta ll at ion & 3760 Pro & Midi Range o pera t in g in str ucti on s Pressurisation Equipment Operation Operation Once commissioned, the pressurisation unit should operate without any user intervention. Once commissioned, the pressurisation unit should operate without any user intervention. Once commissioned, the pressurisation unit should operate without any user intervention. -
Page 23: Shutdown Procedure
Unit need to be restarted Manual Reset Reset Required For practical guidance on diagnosing and rectifying faults, please refer to the Troubleshooting 3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s section of this manual. -
Page 24: Maintenance
i nstall at ion & 3760 Pro & Midi Range o perat ing in str uct ion s Pressurisation Equipment Maintenance Maintenance Due to variations in operating conditions, and the varying loads placed on pressurisation units, it is not feasible to provide accurate predictions of component lifespan. -
Page 25: Check Float Valve Operation
3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s Check Float Valve Operation To test the operation of the break tank float valve, first ensure that the break tank overflow has a suitable path to drain. - Page 26 i nstall at ion & 3760 Pro & Midi Range o perat ing in str uct ion s Pressurisation Equipment Wiring diagram © 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 30 / 44 Errors and omissions excepted.
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Page 27: Troubleshooting
Review unit selection The unit is undersized for the system Review unit selection The FLOOD LIMIT time is too short. Consult Armstrong The FLOOD LIMIT time is too short. Consult Armstrong © 2018 Flamco group. All rights reserved. © 2018 Flamco group. All rights reserved. - Page 28 insta ll at ion & 3760 Pro & Midi Range o pera t in g in str ucti on s Pressurisation Equipment Symptom Problem Solution The PUMP TYPE option is set Review PUMP TYPE setting incorrectly. P1 and/or P2 FAIL is displayed The relevant pump has failed Replace pump P2 FAIL is displayed but the unit...
- Page 29 3760 Pro & Midi Range i nsta l l a t i o n & Pressurisation Equipment o p er at i n g i n str u cti o n s Symptom Problem Solution The wrong/no flow restrictor is Check float valve flow restrictor installed in the float valve (mini and selection (mini and midi units only)
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Page 30: Warranty Details 3
Warranty Details Warranty - What Is Covered? The Armstrong warranty on equipment supplied to distribution and OEM covers manufacturing defects, under our standard terms and conditions of sale. If the unit is identified with a manufacturing defect then no charge is made for correcting the defect. -
Page 31: Statement Of Compliance
& Pressurisation Equipment o p er at i n g i n str u cti o n s Statement of compliance Supplier: Armstrong Fluid Technology 1 Wolverton Street Manchester M11 2ET United Kingdom... - Page 32 t o r o n t o 23 bertrand avenue, toronto, ontario, canada, m1l 2p3 For further information on the 3760 Pressurisation unit range +1 416 755 2291 or to download individual product data sheets please visit: b u f fa lo www.armstrongfluidtechnology.com/en-gb/ 93 east avenue, north products-and-services/heating-and-cooling/...
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