Tottenham Hale

July 2017 - September 2018

• Stripping out and removal of existing ventilation duct work and equipment
• Amendments to the existing main incoming cold water pipe work to serve operational areas
• Decommissioning of current VRF system
• Decommissioning of CER Airedale system

• installation of Mitsubishi VRF heat recovery system with 3No LUL compliant evaporators and BC box
• Installation of Unitair and Nuaire air handling plant
• Installation of bespoke mechanical LUL compliant control panel
• Installation of Flameshield fire rated duct
• Non-fire rated ductwork and fittings including actionair dampers
• Installation of hot and cold water services including megaflow unvented boiler
• Installation of Zip tea points
• Installation of new above ground foul water drainage pipework
• Installation of new hot water generator cylinder

VRF comfort cooling / heating system was installed to serve a number of rooms. All Mitsubishi, utilising sub-surface approved evaporator units with modified casings and filter sections.

Pipework is insulated in Ultima Armaflex and installed on hot dipped (post galvanised) heavy duty Legrand cable tray.

Pumped condensate drains are installed from each evaporator and condensing units

All refrigeration pipework has been strength and leak tested, and then commissioning carried out in accordance with Mitsubishi procedures.

An arrangement of galvanised ductwork and fire rated provides air distribution for the 2No general AHU and toilet extract system, with grilles complete with opposable blade dampers installed. Wherever the galvanised ductwork crosses a fire compartment, an Actionair motorised smoke/fire damper is installed inline in the ductwork.

The Above ground drainage system complies with BS EN 12056 for the design of above ground gravity drainage systems. The system connects to the existing below ground drainage system at the basement level.

In particular, the system comprises the following new components:

Time saver cast soil pipes, stub stack, waste pipe and rodding eyes and Copper ‘P’ taps in LU Staff Gents and Ladies WCs

Copper condensate drain, tundish and safety valve drain for water heater in the Fan Room

The entire domestic water installation is installed in compliance with BSEN 806.

The cold water service extends from the existing mains cold water supply in the booking hall concourse area.

Hot water to the back of house facilities is provided from a central unvented electric water heater with integral expansion equipment. Hot water to the sanitary fittings and sinks is provided from a flow and return pipework circulation system. At the point of delivery, the hot water is blended with TMV3 mixing valves which are built within the taps

Each item of the sanitary ware and equipment is provided with a service valve for isolation. The entire system is thermally insulated to reduce heat loss and heat gain.

We made a very good collaboration with our client Hochtief.

The installation was completed to a very good standard. This back of house area had to be completed by a certain date so that the temporary staff accommodation could be craned off duration a network rail possession. The mechanical achieved this deadline to allow the changeover to take place.

Tottenham Hale Station Upgrade – Control panel and cabling – 20K

July 2018 – November 2018

Scope of works

• Supply and install of bespoke LUL compliant mechanical operation/fault control panel
• Install of power cabling from the panel to the 2No air handling units and VRF system
• Install of control cabling from panel to AHU dip switches and sensors
• Testing and commissioning

A bespoke mechanical control panel was made by Commander’s panel company. Commander assisted the designers to ensure it was made in accordance with LUL standards.

The panel controls the heaters and summer by-pass to maintain supply air temperature during the heating season and limit supply air temperatures during the summer. The panel provides indication of the status off power supplies and fan operation is accordance with LUL standards.

The panel was installed in the fan room. 225mm galvanised tray for communications was run from the panel to the roof are where it diverted to the AHU’s and VRF air conditioning systems. 20No LSF SWA cables were run for the controls and fault cabling.

A separate 100mm tray was run for the 3No 3 phase power cables feeding the plant

NOWRI inspections took place and check sheets were completed in accordance with the approved ITP that was in place.

The trays on the roof were run on a big foot system.

All controls and ancillaries were run and installed by CBSL.

Once the new cable had been installed and terminated, relevant dead tests were conducted as per BS7671. Live tests were conducted at the load end.

Commander supervised the panel company when commissioning.

All cables and control ancillaries were labelled in accordance with regulations

The control panel was an item that was approved at the end of the works, and close to the handover  deadline. Without the mechanical kit running the station staff would not have been able to changeover from the temporary accommodation and the porta cabin units would not have been crane lifted during the Network Rail possession, forcing them to stay in situ for another 4 months. However, CBSL accommodated the short timescale and achieved the deadline.