B513 Planning Meeting, 26^th October 2001

Present: Tony Cass, Marc Collignon, Anne Funken, Jukka Lindroos, Dave Underhill, Tim Whibley

1. Previous Minutes

• A quote for the removal of the newer existing HVAC unit should be available next week.
• The control panel for the new airconditioning units will be in the new technical area. A door will connect this to the machine room area.
• Still no quote as yet for the removal of the additional electrical supply equipment.
• Before providing a final quote for the lighting, ST wanted to know if the vault could be considered as a “hall” or if the lighting standard should be for “office use”. It was agreed that the “hall” standard is sufficient. A quote should be available for the next meeting.
• It was agreed that underfloor lighting, as installed in B613, is a good idea. However, we need to understand better the level of lighting that is required.;

· Denis Raffourt had provided the following quotes for smoke detection systems:

a. 48,600CHF for three ceiling mounted VESDA detectors (one per zone)

b. 36,600CHF for six detectors to be mounted by the air conditioning units

c. 25,560CHF for underfloor detectors

d. 9,480CHF for additional “standard” detectors for the reworked MG room area.

These prices are very similar to those quoted for B613 (e.g. ~30KCHF for two VESDA systems).

• Investigations since the last meeting have confirmed that we should install a false floor with 60cmх60cm tiles. Following the experience in B613, more attention will be paid to the false floor specification (e.g. specifying that the feet must be bolted to the floor, not glued), but there are no particular requirements in terms of the tiling layout.

· The implications of motorised circuit breakers on all output feeders are not yet fully understood, but those present from IT favoured being able to power on each row of racks independently. In addition to the space requirements for the PDUs, we also need a better understanding of the control system.

• Anne and Jukka have investigated the practicalities of installing coils to pre-heating the fresh air intake. There are major practical difficulties in terms of accessibility and we also need to consider if we wish to install heating coils under the false floor. Tony will discuss the need for these coils again with service providers.

2. Review of Proposed Floor Plan

• It was agreed that any “critical computing infrastructure” in the vault will be located in the rectangle with corners (7.D) and (6,G) in plan co-ordinates. The zone (7,F)/(6,G) will be reserved for network equipment. Marc can now go ahead with the order for fibres and associated equipment.

• Nigel will create a “coordination plan” which shows all of the electrical, air-conditioning and network installations. Marc will give Nigel the current network layout plans. This coordination plan will also show the proposed location of the smoke curtains—agreed to be roughly in line with the pillars at x=5 and x=3.
• Marc and Anne will work out how to route the necessary cables and fibres from the network zone in the vault to the equivalent zone in the machine room.
• The issue of defined zones for silos and servers was discussed again. The air conditioning units are rated at 85kW giving a maximum allowed heat load of 170kW per zone. This is equivalent to 34 racks of 40 PCs. It is possible to fit twice as many racks into the air-conditioning zones so the idea of reserving the area (4,G) to (1’,J) for STK silos is attractive. Tony will discuss this further within IT.
• The need for a finer timescal plan for the conversion works ws raised. The existing storage room in the MG room area will be disturbed during the civil engineering work and temporary storage space will be needed. One likely area is the vault itself, but we need to understand when we can start dismantling the false floor. Tony will confirm the current “access date” of December 3^rd with PDP.

· Anne commented again that 240kW is the maximum additional power available for equipment in the machine and vault until the new substation is in place.

3. HVAC imposed height restrictions

· Jukka pointed out that the smoke extraction duct would reduce clearance

a. to 2.2m in the machine room area by the ramp from the lift and

b. to 2.06m in the storage rooms along the vault wall, and this for a distance of 1m from the wall.

• The 2.2m clearance above the ramp is acceptable as far as equipment installation is concerned. Tony will inform the users of the storage areas about the future height restrictions.

4. Substation Planning

• Some details still remain to be clarified before the substation can be sized exactly. It is hoped that these point can be cleared up over the next week, allowing discussion of this topic at the next meeting.

5. AOB

• Anne would like to test the inrush current when a rack of PCs is switched on. This test is to be planned with Mario Vergari.
• Nigel asks if all the ducts on the Tortella’s side of the building are still necessary. Jukka will look into this.
• Next meeting: 9^th November.