The client had an application for a replacement chiller.
The existing centrifugal chiller had aged beyond its useful life of
reliable and efficient operation.
Like most large office, hospital or other institutional buildings the
cooling plant is located in the basement of the structure.
Access into the into the basement mechanical room
can be a challenge. In some retrofit cases excavation,
removal of walls, and holes cut into the floors may be
required to remove an install a new chiller.
Multistack has just the ideal solution with their
modular chiller that can be fit through a normal
doorway or freight elevator.
Existing chiller is a 250 ton centrifugal
chiller utilizing R-11 refrigerant and
electro-mechanical type controls. Maintenance
Costs, reliability and equipment efficiency
warranted the opportunity for the upgrade.
The client due to unreliable operation of the chiller had
acquired a rental chiller to provide chilled water to maintain conditions for the visitor’s center and
critical IT operations that are positioned in the building.
A quick installation of modular chiller would also minimize
the equipment rental cost for the client.
Existing chiller cut into sections and
extracted from the mechanical room
(4) Modules – Nominal 70 ton scroll modules
Single Point power connection – junction box with buss-bar
330 MCA / 400 Amp Panel 460 volt / 3 phase
Part Load Performance - IPLV – 0.594 kW/ton
Access to Mechanical Room – each module thru freight elevator
Critical operation – system built up of 4 independent modules
Stocked at Factory – modules are readily available for installation
Complies with ASHRAE – 15: 24 lbs. / R-410a Per Circuit
no ventilation or refrigeration detection system required.
Old Chiller - one last look.
Existing 250 ton Centrifugal Chiller before dismantled and removed.
Mechanical pad clear for installation of the new chiller.
New Multistack Chiller
Electrical Junction Box
Automatic Blow down set by controls
Old Elctro Mechanical Controls
New Chiller Controls Upgrade
Chiller upgraded with state of the art DDC controls that can be integrated with an existing BMS system.