Axis AGSS TERMINAL UNITS

Transcription

1 Axis AGSS TERMINAL UNITS. Unit 8, McKenzie Industrial Park, Tel No.: 44 (0) Bird Hall Lane, Fax No.: 44 (0) Stockport, U.K., SK3 0SB

2 Contents Page Section Page Product Description General 3 First Fix Assembly 3 Second Fix Assembly 3 Operation General 3 Probe Connection/Disconnection 4 Safety General 4 Installation General 4 Assembly 4 Surface Mounting 5 Flush Mounting Solid Wall 5 Flush Mounting Partition Wall 5 Bedhead Mounting 6 Testing General 6 Pressure Testing 6 Setting-up Requirements 6 Maintenance General 7 Preventative Maintenance 7 First Fix Assembly 7 Spare Parts Lists Gas Specific Components 8 General Components Axis AGSS Terminal Units Rev 1

3 1. Product Description 1.1 General Axis AGSS Terminal Units comprise a first fix and a second fix complete with flow adjuster. The first fix assembly includes a copper pipe for brazing to the fixed pipeline system, a NIST connector for connection to a hose assembly or a permanently crimped hose assembly. Terminal units are available for wall mounting (flush or surface), bedhead trunking and pendant mounting. 1.2 First Fix Assembly The first fix assembly comprises of a machined brass block which is mounted in a die cast housing. The unit is indexed to prevent interchangeability with different gas services either during the installation or maintenance of the unit. 1.3 Second Fix Assembly The second fix assembly comprises of a body which accepts and retains the probe. The base of the body is indexed to match the first fix assembly. The front face of the second fix assembly incorporates a colour coded gas identity label. The unit incorporates a check valve complete with flow adjuster to enable flow control as required. 2. Operation 2.1 General Axis AGSS Terminal Units will only accept the appropriate probe complying with BS6834:1987. To restrict the flow, turn the flow adjuster clockwise using the appropriate Allen key. To increase the flow, turn the flow adjuster anti-clockwise. The flow of gas may be inadequate if the probe is not fully inserted into the second fix which could affect the performance of the AGSS system. 2.2 Probe Connection/Disconnection To connect, the appropriate probe is pushed firmly into the second fix and the retaining nut screwed fully onto the second fix. This action opens the check valve and allows gas to flow Axis AGSS Terminal Units Rev 1

4 3. Safety To disconnect, the probe should be held, the retaining nut unscrewed and the probe withdrawn from the second fix. This action releases the probe. When the probe is removed, the check valve closes providing a gas tight seal. 3.1 General This equipment should be installed, operated and maintained by personnel who are suitably trained, are fully conversant with HTM 2022/HTM 02 & BS 6834 and are familiar with this product. This equipment should be kept clean and be free from oil and grease at all times. Oil and grease will ignite spontaneously in the presence of oxygen. If you suspect that any equipment is contaminated, do not use it. No attempt should be made to use or modify this equipment for use with a gas other than as identified. This equipment should not be operated at pressures exceeding those stated in HTM 2022/HTM 02 and BS DO NOT USE CLEANING/DETECTION FLUIDS WHICH CONTAIN COCONUT DIETHANOLAMIDE AS THIS IS HARMFUL TO ENGINEERING POLYMERS SEALS AND METAL PARTS. 4. Installation 4.1 General Terminal units should be mounted at a height of between 900mm and 1400mm above finished floor level and be not less than 200mm from any obstruction. Where more than one terminal unit is to be mounted in one location, these should be mounted at the following spacing; Two terminal units - 150mm centres. Three or more terminal units - 135mm centres. Terminal units mounted in a horizontal array shall be installed in the following sequence when viewed from the front, left to right; O2; N2O; 50% O2/50% N2O; Medical Air; Surgical Air; Vacuum; AGSS 4.2 Assembly 1. Determine the required position of the terminal unit and secure the first fix assembly and wall mounting box, if required, using suitable fixings ensuring that the assembly is horizontal and plumb. 2. Braze the copper stub pipe to the fixed pipeline system. If the joint to be brazed is close to the brass block, remove the internal components during the brazing operation. 3. Fit the first fix test plug into the first fix assembly and pressure test the pipeline system. 4. Upon satisfactory completion of the pressure test, fit a plaster shield if required. 5. When the wall is finished, remove the plaster shield if fitted, remove the test plug and fit the second fix assembly. 6. Fit the fascia and flush surround if required, pressure test and purge the pipeline system. 7. Fit Danger Do Not Use label as required Axis AGSS Terminal Units Rev 1

5 4.3 Surface Mounting 4.4 Flush Mounting Solid Walls 4.5 Flush Mounting Partition Walls Axis AGSS Terminal Units Rev 1

6 4.6 Bedhead Mounting 5. Testing 5.1 General All terminal units should be pressure tested once incorporated into the fixed pipeline system. The testing is split into two phases as detailed below. The second phase of testing can only be carried out when the first phase has been deemed satisfactory and accepted. 5.2 Pressure Testing This pressure test is carried out when the installation has been completed. The required testing pressures are as stated below or as per the contract specification if different. Testing pressures in accordance with HTM 2022 & BS 6834 are; Test at 0.7 barg for 15 minutes with the terminal unit blanked to ensure that the pressure loss does not exceed 0.1 barg. 5.3 Setting-up Requirements The AGSS system is required to have a flow performance as defined in BS This requires that; 1. The extraction flow at each terminal unit shall not exceed 130 l/min when the resistance to flow is such as to produce a pressure drop of 1 kpa, irrespective of the number of terminal units in use. 2. The extraction flow at each terminal unit shall not be lower than 80 l/min when the resistance to flow is such as to produce a pressure drop of 4 kpa, irrespective of the number of terminal units in use. The flow adjuster is very sensitive and adjustments should be made in small increments, checking the performance of the installation after each adjustment. Adjustment should only be made as part of the setting of the complete system and further adjustments may affect the balance of the system as a whole or other terminal units that have not been adjusted. 5.4 Commissioning The terminal unit must not be used until all testing & commissioning procedures for the pipeline system as detailed in HTM 2022 and/or BS 6834 have been satisfactorily completed and accepted Axis AGSS Terminal Units Rev 1

7 6. Maintenance 6.1 General The only maintenance required is to replace parts that will become worn during normal usage, however the use of damaged probes or faulty equipment may require further maintenance to be undertaken. The first fix assembly incorporates o rings that will require replacing periodically. The second fix assembly is generally maintenance free and should be replaced if damaged. Should the external surfaces of the terminal unit require cleaning, we recommend that this is carried out using a damp cloth along with a mild soap solution if required. Do not use abrasive or solvent based cleaning solutions. Do not let any liquid enter the terminal unit. DO NOT USE CLEANING/DETECTION FLUIDS WHICH CONTAIN COCONUT DIETHANOLAMIDE AS THIS IS HARMFUL TO ENGINEERING POLYMERS SEALS AND METAL PARTS. 6.2 Preventative Maintenance Regular inspections and maintenance of the terminal unit will prolong it s life and reduce the possibility of sudden, inconvenient component failures. Terminal units should be subjected to regular inspection and testing as detailed below. Monthly; (a) Visually inspect the terminal unit for signs of damage. (b) Check the second fix assembly operates freely. (c) Any reluctance in the operation of the second fix should result in the removal of the unit for closer inspection/repair/replacement as necessary. Annually; (a) Remove fascia and clean any debris from the mounting box. (b) Remove second fix assembly and replace the first fix o ring. (c) Test second fix for correct operation (connection and disconnection of probe) using a blank probe. 6.3 First Fix Assembly To replace the o ring in the first fix assembly; 1. Isolate the gas supply to the terminal unit. 2. Undo the two screws and remove the fascia and flush surround if applicable. 3. Remove the two Allen head screw that secure the second fix assembly to the first fix assembly. 4. Remove the second fix assembly and place on one side. 5. Remove the o ring from inside the brass block taking care not to damage the groove. Fit new o ring into the groove. 6. Place the second fix assembly in position. Fully tighten the two Allen head screws, alternating between the two, screwing them in a few turns at a time. 7. Turn on the gas supply and check for leaks. 8. Re-fit the fascia and flush surround if applicable Axis AGSS Terminal Units Rev 1

8 7. Spare Parts Lists When ordering spare parts, please use the following component descriptions and part numbers to ensure that you receive the component that you require! 7.1 General Components Description Part Number First Fix Assembly Refer to 7.1 Second Fix Assembly Refer to 7.1 Mounting Box Mounting Box Cover Mounting Box Flush Plate First Fix O Ring First Fix Test Plug Gas Specific Components Description Part Number Flush TU First Fix Assy, 12mm, AGSS Flush TU First Fix Assy, 2 metre 15mm stub pipe, AGSS Bedhead TU First Fix Assy, 12mm, AGSS Bedhead TU First Fix Assy, 2 metre 15mm stub pipe, AGSS LH Bedhead TU First Fix Assy, 12mm, AGSS RH Bedhead TU First Fix Assy, 12mm, AGSS Rear-entry Bedhead TU First Fix Assy, 15mm, AGSS Rear-entry Bedhead TU First Fix Assy, 12mm, AGSS Pendant TU First Fix Assy, Rear-entry NIST, AGSS Pendant TU First Fix Assy, 90 Rear-entry NIST, AGSS Pendant TU First Fix Assy, Rear-entry hose barb, AGSS Surface/Flush TU First Fix Assy, Top-entry NIST, AGSS TU Second Fix Assy, AGSS Due to our policy of continuous product improvement, Phoenix Pipeline Products Ltd. reserve the right to alter dimensions and/or specification without notice although every effort will be made to advise of any such modifications. Certain aspects of P³ Ltd. designs are protected Axis AGSS Terminal Units Rev 1