Questions and Answers For ASHE 19-1048 Sustains HVAC Water Filters,Multi, Aviano AB.pdf

Question 1:

please clarify if the ball valves and balancing valves shall be installed ( in the specification ball valves and balancing valve are not mentioned) If yes, please confirm that in the main feeding line shall be used ball valves type.

Moreover since the main pipe sizes are missing, please give us this information of all the main pipes for all the systems to be installed.

Answer 1:

Balancing valve and 2ea ball valves on the main pipe are Not necessary. In fact, this items are not mentioned in the work items.

The diagram shows a typical installation but not necessary in our case.

Question 2:

Where the filtering system shall be installed outside the building close to the chiller, please clarify if

- if the cold water feeding piping is available,

- if the cold water feeder shall be connected inside the building, can the piping be installed exposed to the walls and above ground floor or shall digging, backfilling and floor restoration be provided to connect the line from the chiller to the boiler/mechanical room

Answer 2:

Where the filter is installed for the Chiller unit, Filter, cold water feeder, pump and accessories shall be installed inside the mechanical room to avoid freezing during the winter.

Question 3:

Reference to design drawings – “Special requirements for installation” on each the detail tables: It is indicated “suitable to be measured by device Danfoss PFM100”. Please clarify which valve is referred to.

Answer 3:

Danfoss PFM100 is a portable instrument to measure the Water Flow;

Contractor shall provide only the test points for the connection of the subject instrument.