Hudson Bay Health Care Facility

Lighting

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

Boiler Pump Control
Overview
Heating to all areas is provided by hot water supplied by two “Super Hot” gas fired atmospheric boilers with a combined rating of 1920MBH and one “Teledyne Laars” gas fired atmospheric boiler rated at 500 MBH. Boilers were installed in 1988 when facility was constructed and do not appear to be in need of replacement. The system is equipped with Indoor/Outdoor control and boilers are installed between supply and return headers with a pump serving each boiler. A parallel pump configuration is used in the primary loop to pump hot water from the supply header to AHUs and perimeter ceiling radiation panels.

Scope
Boiler pumps P17, 18 & 19 will be cycled with Boilers 1, 2 & 3 respectively. P19 (standby only) is already on Auto mode. Primary loop pumps P2 & P2A are both currently running on ‘hand’ mode due to the current sequence calling for both to be running in order for B2 to start up. The sequence will be optimized to run in lead / standby mode.

Domestic Hot Water Pump and Temperature Control
Overview
Domestic Hot Water (DHW) is provided by two gas-fired water heater rated at 225 MBH each with a recirculation pump running 24/7 and supplies DHW at 164ºF. There is also a booster DHW gas fired heater rated at 199 MBH, which raises water temperature to 210ºF with a recirculation pump also working 24/7. A softening system is used for the domestic water.

Scope
The DHW temperature setpoint will be reduced to 140ºF and the DHW booster heater temperature setpoint will be reduced to 180ºF. The DHW booster pump will be shut off after hours.

AHU Control & Isolation
Overview
A Prairie Controls DDC system controls the operation of Boilers 1, 2 and 3. The chiller is equipped with electric controls, while AHUs have pneumatic controls.

Scope
A new Honeywell Excel 5000 building automation system will be installed to schedule and control the major HVAC equipment. 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 DHW recirculation pump will be placed on a schedule, and the existing control sequence will be reviewed and optimized.

AHU S1 (Acute Care)
Overview
Ventilation for the Acute Care area is provided by a mixed-air AHU S1 with supply and return fans and dual duct distribution system with cold and hot decks. It is located in crawl space. Currently AHU S1 is running 24/7.

Scope
Install CO2 sensor will be installed and a demand control ventilation strategy will be implemented, along with an optimized free cooling mode.

AHU S2 (General Stores)
Overview
Ventilation for the General Stores is provided by mixed-air AHU S2 with supply and return fans and dual duct distribution system with cold and hot decks. It is located in the crawl space. Currently the unit is running 24/7. AHU S2 serves 3 mixing boxes as follows: box 1 serves A143 (General storage), A144 (Soiled linen), and A145 (Clean linen), box 2 serves A149 (Laundry), and box 3 serves A150 (Maintenance office), A151 (Kitchen storage), and A152 (Corridor).

Scope
The unit will be interlocked with the return fan and both will be scheduled off during unoccupied periods (4:00pm to 7:00am).

AHU S3 (Long Term Care)
Overview
Ventilation for the Long Term Care area is provided by mixed-air AHU S3 with supply fan and dual duct distribution system with cold and hot decks. Currently AHU S3 is running 24/7.

Scope
3 zone isolation dampers will be installed to shut off airflow to the selected area during unoccupied periods.

Motion sensors will be installed in rooms B126 (Conference room), B127 (Chapel/Activity room) and C126 (Bath facilities) and airflow will be shut off in these areas when no motion is detected. A new VFD will be installed on supply fan (7.5hp, 208/3, 20 Amp), and the VFD speed will be controlled to maintain a constant supply air static pressure. All necessary DDC controllers and points will be installed.

AHU S4 (Labs & E/R)
Overview
Ventilation for the Labs and E/R area is provided by a mixed-air AHU S4 with supply and return fans and dual duct distribution system with cold and hot decks. It is located in crawl space. Currently AHU S4 is running 24/7.

Scope
Zone isolation dampers will be installed to shut off airflow to the selected areas during unoccupied periods (4:00pm to 7:00am).

Motion sensors will be installed in A110-Multilpurpose room and airflow will be shut off to the area when no motion is detected. New VFDs will be installed on the supply fan (10hp, 208/3, 26 Amp) and return fan (5hp, 208/3). The supply fan VFD speed will be controlled to maintain a constant supply air static pressure. Return fan speed will track supply fan VFD speed. All necessary DDC controllers and points will be added.

AHU S5 (Kitchen)
Overview
Ventilation for the Kitchen area is provided by a 100% outdoor air unit, AHU S5. It is located in the crawl space and is currently running 24/7. Range hood exhaust fan E3 is currently being shut off manually.

Scope
Range hood exhaust fan E3 will be interlocked with the supply fan and the unit will be scheduled off after hours (5:00pm to 7:00am).
 

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.
 

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. Water savings can be realized through a variety of methods including low flow toilets and shower heads as well as sink faucet moderators.

Scope
While some of the toilets at the facility have already been upgraded, a site audit performed by Water Matrix recommends that 16 toilets be upgraded to low flow models, 5 shower heads be replaced with low flow models and 65 sink faucets be fitted with low flow aerators.
 

Parking Plug Control
Overview
There are 32 duplex parking plugs serving 64 parking stalls. They are approximately 70% occupied during the winter months. There are currently no controls on these plugs and they all feed into a central panel located in the basement of the clinic adjacent to the facility.

Scope
IPLC controllers will be installed to replace 32 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.

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 5 exterior doors, installation of bottom sweeps on one set of double doors and weather stripping of 2 interior doors to isolate the loading dock and mechanical room. CANAM also recommends roof/wall sealing at the following locations:

• Seal 45’ of roof/wall at south east corner. This location has condensation issues in the winter. The vapour barrier is not sealed properly below the beam. Seal the block wall to beam joint with two part polyurethane foam.
• Seal 50’ x 3 lines of roof/wall at the northeast corner. There is a roof level change and the vapour barrier is not sealed properly at many locations. Seal the vapour barrier seams and at all locations that it makes contact with the beam and roof deck using two part polyurethane foam.

Upgrade Garage Exhaust (VFA)
Overview
The garage area currently lacks an adequate 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 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.