Kelvington Hospital

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

Controls Upgrade
Overview
Currently each boiler has its own controller with a steam pressure sensor. A Johnson Controls pneumatic system controls the operation of AHU-1 and rooftop units are controlled by room thermostats
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Scope
A new Honeywell Excel 5000 building automation system will be installed to schedule and control the major HVAC equipment with a networked operator interface that is connected to the main hub in Tisdale. The new controls will improve the control of the heating water, allowing for an outdoor ambient temperature reset schedule. Pumping schedules will also be implemented with the new controls to ensure that the main and subsequent circulation pumps are turn off during non-heating months. Also, air handling units will be scheduled based upon a daily schedule and seasonal schedule.

The boiler plant will be automated with an outside air reset and summer shutdown, and the boilers & heating pumps will operate on an occupied/unoccupied schedule based on OAT. In addition, the chiller plant control will be optimized, the DHW recirculation pump will be placed on a schedule, and the existing control sequence will be reviewed and optimized.

Main AHU
Overview
Ventilation is provided by a main mixed air multi zone AHU (8 zones, heating only) with supply and return fans serving OR, X-Ray lab, nurse station, south administrative offices, staff dining room, observatory, east and west wards.

Scope
4 zone dampers will be installed to serve Zone 2 (X-Ray Lab, Medical clinic), Zone 4 (South Admin office), Zone 5 (Observatory), and Zone 7 (Staff dining room), respectively. Zone 5 and 7 will also have occupancy sensors installed and airflow will be enabled when motion is detected. A new VFD will be installed on supply fan (10hp, 208/3) and return fan (3hp, 208/3, 9 Amp). All necessary DDC controllers and points will be added. The dampers will be programmed to open at 7:00am and close at 6:00pm

2 Heat/Cool Rooftop Units
Overview
There are two 3-ton mixed air rooftop units. One serves the doctor offices and lab area and the other serves the kitchen and dining room. Each of the rooftop units has a packaged D/X cooling system and a gas burner to temper ventilation air and is controlled by a thermostat located in each space. Currently each of these rooftop units operates on a 24/7 basis. The spaces served by these units are largely unoccupied after 5:00pm and as such significant savings can be realized by scheduling these units off during the unoccupied period.

Scope
A programmable thermostat will be installed for each rooftop unit and will be programmed according to the schedule shown in Table 5.17. The thermostat will have an override function to allow for extending the rooftop unit schedule so that staff can activate each system to facilitate after-hours or on-call work.

Domestic Hot Water
Overview
Domestic hot water is provided by an 80 Gal gas fired heater tank rated at 200 MBH with a fractional recirculation pump working on a 24/7 basis. A softening system is used for the domestic water which is also treated by a reverse osmosis filtering system.

Scope
The recirculation pump will be shut down after hours. All necessary DDC controllers and points will be added including a push-button override for after-hours use.
 

Parking Plug Control
Overview
There are 5 duplex parking plugs, serving 10 parking stalls that are fully occupied during the winter months operating with no temperature control.

Scope
IPLC controllers will be installed to replace 5 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.
 

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.
 

Building Envelope Sealing
Overview
An investigation to upgrade the current conditions of the building envelope was conducted by CANAM Building Envelope Specialist. The results of this investigation have uncovered several areas where the building envelope can be upgraded in order to reduce heating costs. Most of the areas where improvements may be made within the confines of the performance contract involve low cost sealing of identified cracks around doorways.

Scope
The scope of work detailed by CANAM recommends the weather sealing of 6 exterior doors and the caulking of perimeters (423’), glazing (648’) and operable portions (270’) of 27 windows.
 

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 both the domestic and 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.