The TECHFLOW ‘TP’ peripheral pump with integral flow switches has been designed to boost pressure and flow from normal domestic tank fed supplies to single mixing type shower valve applications.

For multi-appliance applications we advise using the Techflow ‘QT’ range of pumps.

It is essential to ensure that a MINIMUM USABLE cold water storage capacity of 50 galls. is available and that the hot water capacity is adequate for the application.

TECHFLOW PUMPS ARE DESIGNED TO COMPLY WITH THE UNITED KINGDOM WATER FITTING BYE LAWS SCHEME AND ALL INSTALLATIONS SHOULD BE CARRIED OUT BY A COMPETENT PERSON IN ACCORDANCE WITH THE RELEVANT WATER BYE LAWS AND REQUIREMENTS OF THE INSTITUTE OF ELECTRICAL ENGINEERS.

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DIM. REF. TP60 A 233 B 280 C 140 D 170 WIDTH 80 ALL DIMENSIONS ARE IN MILLIMETRES

1. SITING

   1. The pump should, for optimum performance, be sited at the base of the HOT WATER cylinder and at least 12" (300 mm ) below the bottom of the cold water storage tank. A minimum gravity flow of 1 litre per minute is required on each side of the pump to activate the flow switches.

   2. The pump must be mounted horizontally on it's four feet on a rigid level surface to facilitate adequate ventilation to the motor.

   3. If installed in the roof space or other unheated areas, adequate protection against frost must be provided whilst maintaining ventilation to the pump motor.

2. PIPE WORK CONNECTIONS

   1. Figs. 1 - 5 show typical installations. The HOT feed to the pump is most important and the following criteria must be met:

      Fig 1	-	The Essex Flange must be either a 15mm or 22mm No Stop type.
      Fig 2	-	The Warix Flange MUST be a 3/4in type.
      Fig 3	-	The Surrey Flange MUST be a 3/4in type.
      Fig 4	-	The Vent/DHWS MUST be run in 22mm (min.). Min. vent height 1metre.
      Fig 5	-	An Essex Flange with AGL MUST be used when the pump is mounted ABOVE the hot water cylinder.

   2. Where possible both HOT and COLD supplies should be dedicated / exclusive to the pump (i.e. not shared with other services ). If it is necessary to ‘Tee’ off existing supplies then the following criteria is required:

      1. Both existing hot and cold supplies MUST be 22mm (min.).

      2. The pump feeds MUST be the first draw-off.

      3. The HOT supply MUST be via. one of the 3/4” anti-aeration flanges detailed.

   3. The HOT WATER feed from the cylinder to the pump should be 3 meters MAX. if run in 15mm or alternatively 6 meters MAX. if run in 22mm pipework.

   4. The COLD WATER connection from the cold water storage tank should be positioned at least 25 mm (1") below the cold water supply pipe to the hot water cylinder.
      NEVER CONNECT COLD WATER MAINS SUPPLIES DIRECTLY TO THE PUMP OR PLACE IT IN THE SAME LINE AS ANOTHER PRESSURE PUMP.

   5. The DOWN SERVICE from the cold water storage tank to the hot water cylinder should be made on the opposite side of the tank from the cold mains inlet (to minimise aeration to the pump) and run in 22mm (min).

   6. Only PLASTIC TUBE or COPPER PIPE to relevant B.S. specification should be used. Wherever possible it is recommended that plastic tube is used as this will reduce even further any resonance or noise levels but adequate support should be provided.

   7. The hot expansion / vent MUST be run in 22mm (min) pipework.

   8. The flexible coupling hoses with 15mm ‘push on’ connectors supplied must be used in all installations. The pump should be sited in a position where these hoses are not bent or deflected by more than 30º from the vertical.

   9. To remove the hoses from the pump or pipework hold the grey collet towards the fitting and pull off the hose.
      NEVER MAKE DIRECT CONNECTIONS TO THE PLASTIC INLETS/OUTLETS OF THE PUMP WITH COMPRESSION TYPE FITTINGS .

   10. Either end of the pump can be used for hot or cold connection. Ensure that the OUTLET pipework is fitted to the connectors marked with the ARROW. cut perpendicular to the length of the pipe.

       
       FIG. 1
       ESSEX FLANGE OR SEC. BOSS

       
       

       
       FIG. 2
       WARIX FLANGE

       
       

       
       FIG. 3
       SURREY FLANGE

       
       

       
       FIG. 4
       TAKE OFF FROM ANGLED VENT

       
       

       
       FIG. 5
       ESSEX FLANGE + A.G.L.

3. ESSEX FLANGE INSTALLATION (See Fig.6)

   NOTE: The dimensions shown below are for a 22mm No Stop Essex flange. The same procedure can be used for a 15mm No Stop Essex Flange but the dimensions will vary. Refer to instructions supplied with flange.

   1. Select a position on the cylinder away from immersion heater port as water drawn from the area around the immersion heater will be aerated.

   2. Mark the centre point of the proposed hole approx. 60mm below seam of cylinder. Cut out a 75mm square of the insulation around the proposed hole position. Lower the water level in the cylinder to below this point.

   3. Mark two concentric circles on the cylinder, the inner circle 40mm dia. and the outer circle 65mm dia.

   4. Cut a hole the size of the inner circle (1 1/2 in. dia.). Clean any burrs from cut edge of hole and remove any limescale deposit from inside face of cylinder to ensure a clean sealing face.

   5. Form the Collector Tube (1) from either 22mm or 3/4in copper tube as shown in the diagram by pulling a 150mm (6 in) radius bend of approx. 45 degrees. Ensure that sufficient parallel section is left on the external side to enable the tube to be held during assembly of the flange. Mark a pencil line or score a line on the top edge of the parallel section to ensure correct orientation of the tube on assembly.

   6. Slide the Flange Body (2) over the parallel section of the Collector Tube (1) and manipulate the flange through the cut hole.

   7. Open up the gap in the Split Washer (3) and slide over Collector Tube (1). Feed split end through cylinder wall and rotate to position on inside of cylinder. Locate on Flange Body (2) and pull tube assembly up against inside wall of cylinder to close up gap in washer.

   8. Now slide Sealing Washer (4) onto Collector Tube (1) and feed through hole to position on inside of cylinder and over Flange Body (2).

   9. Feed second Sealing Washer (5) and Clamp Washer (6) over Flange Body (2) and push up against cylinder wall.

   10. Apply bead of clear silicon sealant around inner diameter of Clamp Washer (6). Fit Nut (7) and hand tighten. DO NOT APPLY SEALANT TO SEALING WASHER (5).

   11. Ensure that the pencil line on tube is positioned uppermost and that the assembly is central within the 65mm circle marked on cylinder. Lightly tighten Nut (7) to clamp up assembly.
       DO NOT OVERTIGHTEN.

   12. Fit compression nut and olive to complete assembly. Grip Flange Body (2) when tightening to avoid rotating flange assembly.

   13. Complete pipework to pump inlet including fitting of isolating valve. With valve closed re-fill cylinder and check for leaks around flange. If necessary tighten Nut (7) to achieve seal.

4. ISOLATING VALVES

   1. 15mm or 22mm GATE TYPE or FULL - BORE LEVER OPERATED BALL TYPE isolating valves MUST be fitted to all inlets and outlets in an accessible position and as close to the pump as possible.
      SERVICE CALLS WILL NOT BE UNDERTAKEN BY TECHFLOW PERSONNEL WHERE ISOLATING VALVES ARE NOT FITTED.

   2. Ballofix and other types of isolating valves MUST NOT be fitted as they can be restrictive resulting in starvation at the pump inlet and subsequent damage to the pump.

      
      FIG. 6
      ESSEX FLANGE INSTALLATION

5. HOT WATER TEMPERATURE

   1. The temperature of the hot supply MUST NOT exceed 65ºc at the pump inlet. A cylinder stat. MUST be fitted to provide adequate temperature control and set to a MAXIMUM temperature of 60ºc.

6. ELECTRICAL INSTALLATION
   THIS PUMP MUST BE EARTHED

   1. The electrical installation MUST be undertaken by a competent person and MUST comply with the relevant IEE regulations.

   2. All pipework must be cross bonded and an RCCB fitted in compliance with IEE regulations.

   3. The 240 volt supply should be taken via a fused spur from the domestic ring main and fitted with a 5 amp fuse. Higher rated fuses should not be fitted.

7. COMMISSIONING

   1. The inlet pipework must be thoroughly flushed to purge the system of any swarf, traces of flux etc. BEFORE connection to the pump.

   2. Having connected both inlet and outlet supplies open all isolating valves.

      CHECK FOR LEAKS.

   3. Open the shower valve or terminal fitting and allow water to flow through the system on GRAVITY for 2/3 minutes. With the shower valve still open switch on the power supply to the pump for 5/10 seconds and then switch off again. Allow a further 30 seconds of GRAVITY flow before switching the pump on to run for 10 seconds. Repeat this cycling until all air is purged from the system. Use the fitted manual finger vents to assist in purging the system.

      NOTE: If a flexible hose and handset shower system is installed remove the handset from the shower hose and lay the hose in the shower tray when purging the system. This ensures maximum gravity flow and will reduce the purging time.

      NEVER ATTEMPT TO OPERATE A DRY PUMP AS THIS WILL CAUSE IRREPARABLE DAMAGE TO CRITICAL INTERNAL SEALS ETC.

8. NEGATIVE HEAD INSTALLATIONS

   A Negative Head situation occurs when the level of cold water in the storage tank falls below the shower head outlet or other taps or appliances resulting in no gravity flow through the system or insufficient flow to operate the integral flow switches fitted in the pump.

   PLEASE NOTE THE REQUIREMENT FOR A MINIMUM 12" (300 mm) GAP BETWEEN THE BOTTOM OF THE COLD WATER TANK AND THE PUMP INLETS STILL APPLIES.

   Negative head versions of the TP60 are available and these are:

   TP60MSP - supplied with pull cord switch to operate

   TP60MSA - supplied with flush-mounting air switch to operate

   Please contact your dealer or telephone the Helpline for further details.

9. SERVICING

   TECHFLOW PUMPS ARE FACTORY SEALED UNITS AND THEREFORE SERVICING OR REPAIRS SHOULD ONLY BE CARRIED OUT BY TECHFLOW OR ITS AUTHORISED SERVICE AGENTS.

   DISMANTLING THE PRODUCT WILL INVALIDATE YOUR WARRANTY.