Melfort Parkland Place

Humidification Conversion
Overview
There are currently four 15 kW electric humidifiers serving each of AHUs 1 through 4 respectively. While the units were new with the facility, they have been prone to problems to the point where none are currently operational. Significant savings could be achieved by replacing the units with natural gas fired models.

Scope
The electric humidifiers on AHUs 2, 3 & 4 will be replaced with natural gas fired models of equal capacity. The location of AHU 1 precluded retrofit of its humidifier, but as this system serves the support services area humidification is not as vital as in the areas with 24/7 occupancy.

Zone Isolation
Overview
Parkland Place has several Fan Coil Units (FCUs) which provide conditioned air to the specific spaces. Each unit has its own manual controller within the space which is in turn connected to the Prairie Controls Building Automation System governing their operation. Some of these FCUs supply spaces that are not consistently occupied during normally occupied hours (such as storage areas) and as such could be shut off until required on a case by case basis being activated either by a push-button or via motionsensor.

Scope
Occupancy sensors will be installed in spaces supplied by the FCUs listed in Table 5.21. The FCUs will be programmed via the Prairie Controls BAS to be normally closed unless activated by the occupancy sensor.

Vending Machine Control
Overview
Cold beverages are available for purchase at this site from a single refrigerated beverage dispensing machine. It has self contained refrigeration and illumination that are currently running constantly, regardless of whether people are in the area to purchase beverages.

Scope
A Vending Miser control will be implemented on refrigerated vending machines within the facility. It will be wall mounted and plugged into the receptacle providing power to the existing vending machine, and the vending machine will then be plugged into the Vending Miser receptacle. It can be relocated with the vending machine.

A passive infra-red sensor detects occupants and allows the machine to power down when the surrounding area is vacant. The device also monitors room temperature and vending machine compressor operation to automatically re-power the cooling system at one to three hour intervals to ensure that drinks remain cool.

Savings result because the machine lighting is only on when the area is occupied, and the compressor does not short cycle, which increases the efficiency and life span of the compressor.
 

Parking Plug Control
Overview
Approximately 24 existing duplex parking plug receptacles are not presently controlled. By implementing controls on these the power delivered to the plugs will be cycled based on outside temperature achieving both electricity consumption and demand savings while maintaining necessary power to the plugs so that users are able to start their vehicles. Time and temperature control will be installed. Plugs will be energized on at temperatures below -30C, alternate in at least 2-banks at 20 minute intervals at temperatures between -15C and -30C, and be off at temperatures above -15C. The lot will function as above to accommodate 24/7 function of the facility. Electrical savings will result from reduced energy consumption and reduced electrical demand.

Scope
IPLC controllers will be installed to replace 11 duplex receptacles and programmed to cycle 40% of the time when the temperature is between -5C and -15C, 70% of the time between -15C and -25C and 100% of the time when the temperature is -25C or colder.
 

Backflow Prevention (VFA)
Overview
Backflow occurs when the water flows in the opposite direction from its normal flow. The cause of a backflow is a change in pressures. This reversed direction of water flow may allow contaminants to enter the drinking water system through cross-connections. Backflow Prevention is a strategy whereby a valve is placed in the domestic water supply line of a given facility in order to prevent contamination by pollutants due to ‘backflow’ in the system. Examples of testable backflow preventers used for medium to high hazard processes include: reduced-pressure principle assemblies, double-check valve assemblies and pressure vacuum breaker assemblies.

Scope
Backflow Prevention double-check valve assemblies will be installed in the fire pump water supply pipes in order to comply with the 1995 National Building Code part 7.6.2.3 and CSA.Z317.1 Canadian Standards Association Special Requirements for Plumbing Installations in Health Care Facilities, Section 6.3.3.5.