AHI Carrier Catalog | Page 563

WATER-TO-WATER HEAT PUMPS  30XWHV 580-1710 Carrier products and green ­building certification ■■ Introduction Energy usage and costs combined with increasing concerns to reduce CO2 emissions are among the most important environmental challenges in today’s world. New and existing buildings are one area where energy efficiency and the conservation of natural resources is a high priority. ■■ Green building design Design teams increasingly focus on designing “green buildings” to address today’s energy efficiency and environ-mental sustainability needs. A green building is a building that is environmentally sustainable and has been designed, constructed and is operated to minimise the total impact of the environment. Remote management ­ (EMM option) The Energy Management Module offers extended remote control possibilities: -- Room temperature: permits set-point reset based on the building indoor air temperature (with Carrier thermostat) -- Set point reset: ensures reset of the cooling set-point based on a 4-20 mA or 0-10 V signal -- Demand limit: permits limitation of the maximum chiller power or current based on a 0-10 V signal -- Demand limit 1 and 2: closing of these contacts limits the maximum chiller power or current to two predefined values -- User safety: this contact can be used for any customer safety loop; opening the contact generates a specific alarm -- Ice storage end: when ice storage has finished, this input permits return to the second set-point (unoccupied mode) -- Time schedule override: closing of this contact cancels the time schedule effects -- Out of service: this signal indicates that the chiller is completely out of service -- Chiller capacity: this analogue output (0-10 V) gives an immediate indication of the chiller capacity -- Alert indication: this volt-free contact indicates the necessity to carry out a maintenance operation or the presence of a minor fault. C A R R I E R 2 0 1 6 / 2 0 1 7 The main strategies* adopted to achieve a green building design include: -- Sustainable Sites (SS) -- Water Efficiency (WE) -- Energy & Atmosphere (EA) -- Materials & Resources (MR) -- Indoor Environmental Quality (IEQ) -- Innovation in Design (ID) ■■ Green building certification A number of green building certification programs exist in the market and offer third-party assessment of green building measures for a wide variety of building types. Some examples of existing programs include: -- LEED (Leadership in Energy & Environmental Design) -- BREEAM -- ESTIDAMA PEARL -- NABERS (National Australian Built Environment Rating System) ■■ HVAC products and systems Carrier HVAC products are built to high energy efficiency and indoor air quality standards. They assist building designers and owners by offering high-performance heating, ventilation, and air conditioning (HVAC) systems and products with reduced energy consumption and enhanced indoor air quality for the occupants, contributing to optimised green building performance. Each certification program may address and prioritise different green building design strategies according to local and regional needs and legislation. The following example looks at how Carrier’s new 30XWHV range helps customers involved in LEED building certification. * AIR TREATMENT ■■ R-134a refrigerant -- HFC-refrigerant with zero ozone depletion potential ■■ Leak-tight refrigerant circuit -- Reduction of leaks as no capillary tubes and flare connections are used -- Verification of pressure transducers and temperature sensors without transferring refrigerant charge -- Discharge line shut-off valve and liquid line service valve for simplified maintenance. HEATING The underlying principles of this approach: the resulting building will be economical to operate, offer increased comfort and create a healthier environment for the people who live and work there, increasing productivity. Environmentally balanced Source USGBC: LEED Example: 30XWHV and LEED® certification The LEED® (Leadership in Energy and Environmental Design) green building certification programme is a pre-eminent programme to rate the design, construction and operation of green buildings with points assigned in seven credit categories: 563 CONTROLS ■■ Advanced control algorithms combine inverter frequency output with motor input logic to minimise mechanical part stress, resulting in best compression performance and high chiller reliability. The compressor is equipped with bearings with oversized rollers, oil pressure lubricated for reliable and durable operation, even at maximum load. ■■ Other advantages: -- If a fault occurs e.g. if the condenser is fouled or at very high water temperature, the compressor does not switch off, but continues operation at reduced capacity (unloaded mode). -- The silencer in the discharge line considerably reduces discharge gas pulsations for much quieter operation. -- The condenser includes an oil separator that minimises the amount of oil in circulation in the refrigerant circuit and re-directs it to the compressor function.