Tisdale Hospital

Lighting
The following table provides descriptions of the existing and proposed lighting conditions for different areas of the facility.

Zone Isolation
Overview
The Tisdale Hospital uses a Honeywell BAS to control virtually all of the primarily H.V.A.C functions for the entire facility with ventilation air being provided by two main AHUs. AHU-1 serves is a dual duct system that serves the wards and surgery areas while AHU-2 is a dual duct system serving the administrative and support areas. Treated air is supplied to the spaces by Microcel terminal boxes which temper the air as per input from thermostat controls located the space. Both AHUs are operating on a 24/7 basis and as such significant energy savings can be realized by controlling the individual terminal boxes to minimize supply air to spaces during periods where they are not occupied.

AHU-1
O/R
Overview
The O/R has not been used as an operation theater for some time due to lack of staff. The area is going to be converted to a dialysis unit that will only be occupied during the day and as such supply air to the area can be reduced during un-occupied periods.

Scope
With the existing BAS, schedule mixing box 3-7 closed during unoccupied hours along with a temperature sensor and pushbutton override. Also, interlock ex fan F-22 and associated damper AV3-4 and program to go to full recirculation during the un-occupied period. Also interlock F-22 operation with mixing box 3-7. VSDs will be installed on both the supply and return fans of AHU-1.

AHU-2
Overview
There are several areas supplied by AHU-2 that are not occupied 24/7 yet the associated mixing boxes are currently delivering air on a continuous basis. Significant savings can be achieved by using the existing BAS to close the boxes during unoccupied periods.

Scope
In order to effect these changes a VSD will be installed on both the supply and return fans in order to maintain the necessary air balance.

Kitchen Area
Scope
Interlock operation of ex fan F-19 (dishwasher exhaust) with operation of the dishwasher and schedule the following mixing boxes to open at 6:00am and close at 7:30pm via the existing BAS. Kitchen Hood (F-18) will have to be interlocked with the listed boxes
· Box 6-5 Kitchen
· Box 6-6 Kitchen/Bulk Stores
· Box 6-7 Kitchen
· Box 6-8 Cafeteria

Radiology Area
Scope
Schedule the listed boxes to open at 6:00am and close at 5:30pm via BAS and provide pushbutton overrides for on call work. Interlock ex fan (F-23) with operation of boxes 4-16 and 4-19. Interlock ex fan (F-14) with the operation of boxes 4-11, 4-14, 4-16, 4-18 & 4-19

• Box 4-14 EKG/Ultrasound
• Box 4-16 Radiology - Suite 1
• Box 4-17 Technicians office
• Box 4-19 Radiology - Suite 2
• Box 4-7 Records
• Box 4-1/2 Library
• Box 4-3 Health Ed. Director's Office
• Box 4-10 Exec Admin Office
• Box 4-11 Asst Admin Office
• Box 4-19 Film Processing

Lab Area
Overview
The Lab area has equipment that generates heat which in turn requires constant cooling. Scheduling the area was tried in the past, but was discontinued due to ruined lab cultures.

Scope
Schedule mixing boxes 4-21, 4-22, 4-23, 4-24, 4-25, 4-26, 4-27 & 4-28 to open at 6:00am and close at 5:30pm via BAS and provide pushbutton overrides for on call work. During unoccupied hours the boxes will be programmed to “Cold Deck” only. A VSD will be installed exhaust fan F-25 and an interlock established between it and mixing boxes 4-21 thru 4-28

Home Care
This area was originally designed as the Physio Gym and is equipped with it's own FCU (F-27) that provides heating to the space when required (heating coil supplied by return air)
Scope
Schedule mixing boxes 7-17 & 7-2 to open at 6:30am and close at 5:00pm via BAS and provide pushbutton overrides for on call work

Support Services Area
Scope
Schedule mixing boxes 5-3, 5-4 & 5-11 to open at 6:00am and close at 5:30pm via BAS and provide pushbutton overrides for on call work

Misc Boardrooms & Offices
Scope
Schedule boardroom and committee rooms (boxes 6-10, 6-11 & 6-12) closed all the time with an occupancy sensor in the space to trigger operation of the boxes. A pushbutton override will also be installed. Schedule mixing boxes 6-16 & 6-14 to open at 6:00am and closed at 5:30pm via BAS with provide pushbutton overrides for intermittent use.

Convert Water Cooled Condensers to Air Cooled
Overview
Treated water is a carefully manufactured product, which appears in the facilities only after traveling through many miles of pipeline and lengthy treatment process. It’s a vulnerable resource that shouldn’t be wasted. There is significant use of refrigeration equipment using city water. Currently, city water is used as a heat sink to reject heat from the refrigerant after the compression cycle. In the condenser, the cold water absorbs heat from the high temperature and high pressure refrigerant. Liquid refrigerant from a condenser is then directed to a cooling coil (evaporator) while water is damped to drain. This method of operation wastes a large amount of water and as such, savings can be realized if the water cooled condensers are converted to air-cooled models of equal capacity.
Scope
Water cooled condensers will be upgraded to air cooled models of equal capacity.
 

Water Conservation Measures
Overview
Treated water is a carefully manufactured product, which appears in the facilities only after traveling through many miles of pipeline and lengthy treatment process. It’s a vulnerable resource that shouldn’t be wasted. Significant water savings can be realized by updating water consuming devices such as toilets, faucets and urinals with water saving technologies.

Scope
Water Matrix recommends that 110 faucet head will be equipped with aerators to reduce flow.

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 35 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 35 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.

Upgrade Garage Exhaust (VFA)
Overview
The garage area currently lacks adequate an exhaust system, resulting in potentially dangerous concentrations of CO and CO2.

Scope
A dedicated ventilation fan will be installed, along with CO and CO2 sensors. While this measure will address an important facility issue it will not result in any capital savings and so is considered a capital upgrade
 

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.