Facility Forum - Fall 2016 - 27

Wall inlet lines must be blown dry with nitrogen or air. Shop vacs with discharge blower connections will provide sufficient airflow to dry the lines; it's volume, not pressure that is required. It may take several hours per line to fully dry out the system. Once dried, cap off the lines with threaded ABS plastic plugs using Teflon tape to seal the threads. Heaters, boilers, heat exchangers, recirculation pumps, lint traps, filter tanks, pump volutes; all have frost or drain plugs located at the lowest level of the unit. These plugs must be removed, greased and can be re-taped with Teflon, while allowing the unit to drain out completely. Pump seals, motor bearings and filter anodes should be serviced or if necessary, replaced in the fall. Spring start up time is the worst season of the year to seek pool parts and service. Late fall is the best when prices are lower and staff well trained by summer's experience. The most critical and expensive problematic devices in outdoor pool winterizing are the deep end drains. Whenever the drain sumps are more than 3.0  metres below deck level or 2.0 metres below wall inlets, it is usually not necessary to winterize the drains as the frost level will not freeze the water this deep. However, if the pool should suddenly lose water in mid-winter, the water in the sumps could freeze and expand thus fracturing the pipe connections as well as breaking off hydrostat fittings. At some pools, the bottom was fully covered with bales of straw to prevent frost action, but spring cleanup was very messy and costly. In pools with less than 1.5 metres of water cover, it is wise to drain the pool in late fall, blow dry the drain lines and install expandable rubber test plugs to seal off the lines completely once dry. Of course, pool drain fittings or pipe larger than 3.0  inches [7.5  cm] in diameter are not usually threaded on the inside surface so special plumber's test plugs are required. Once the drain lines are dried and sealed, the pool should be re-filled to just below the side wall inlet fittings. When re-filling, the fresh water should be close to the pool tank temperature to avoid thermal shock to the structure and THE RESULT OF THOROUGH CLEANING AND PREPARATION IN THE FALL WILL RESULT IN COST SAVINGS IN THE SPRING WHEN IT MAY NOT EVEN BE NECESSARY TO DRAIN THE POOL FOR SCRUBBING OR PAINTING. coatings. This process is costly and time consuming but to neglect this important step can result in loss of the drain system eventually and unnecessary huge expenses to install new side drains or cut open the main pool floor slab to replace split drain pipe and fractured drain sump pits. As the weight of a pool full of water to operating level weighs less than the ground excavated for its construction, pools tend to float in the soil as geologists tell us it behaves as a fluid. One who doubts this can try floating a soup bowl in a pan of water by adding water into the bowl to see if it will sink. Gases, air, water, ground water, wells, rainfall, washouts under deck, moisture laden clay soils can all contribute to the floating of a concrete pool. Once a pool does lift or shift, it is usually impossible to have it return to the correct location and attitude or level. To help minimize the problem of this phenomenon, 6, 4, 2 or 1 ½ inch inside diameter hydrostatic relief valves are installed through the bottom of each main drain sump pit. These valves are not unlike the concept of a sink stopper. They connect to a perforated pipe or well point that goes well into the sub- soil and are surrounded by a filter fabric material and crusher run washed clear gravel at least ¾ inch in size. Should pressure develop outside the pool shell that exceeds the weight of water in the pool, the valve cap will open to allow the gases or fluids into the pool. Sand, stones or grit can lodge under the gasket or around the "O" ring of this valve and face plate such that when the pressure is equalized, water seeps out of the pool and may wash out the fill under the pool floor creating an even greater problem. In effect, there is now a hole in the ground under the bottom of the pool. Many pool operators replace the hydrostatic valve "O" rings or gaskets each year to ensure a tight fit or waterproof seal and thus reduce loss of water during the operating season. Once the systems are down for the winter, the motor control centre should be de-energized at the fuse or breaker panel having fuses removed and locking out disconnect switches such that motors cannot be inadvertently started which would burn out seals and shafts as no cooling water is in the lines. Preparing for Re-opening By carefully reversing all of the preceding actions, the pool can be placed into operation in spring rather quickly. Remember to make application to the local health unit well in advance of opening day to ensure you have received written permission to open. Water temperature must be monitored if filling a pool quickly by fire hoses or other rapid means. Thermal shock can cause cracking of pool tanks or at least pop out any caulking or waterstop that is not properly placed. Replacement of any major components with other than identical model and size could result in a full compliance order to meet current Regulations for Class "A" and Class "B" pools which again might prove to be extremely costly. Winterizing and summarizing public pools properly requires check lists and directives based on competent and logical experience which varies greatly from pool to pool and community to community. Having stated the above, it is not always in the best community interest to have students who have had a long hot summer's work experience rush about on Labour Day weekend to close a pool and get to the college or school fresh party on time, leaving the outdoor pools in a manner that might result in long term mechanical or structural permanent damage. Don't just turn out the lights and lock the door. When you return next spring, the pool just might not hold water! ■ FACILITY FORUM | 27

Table of Contents for the Digital Edition of Facility Forum - Fall 2016

Industry Watch
Home Run Baseball Hits a Pedestrian
All Granites are Not the Same
Technically Speaking
Risk Management – City Found Not Liable in Skating Injury
Winterizing Pools
Member Profile – Ross Rankin, RA Centre, Ottawa
Use of Medical Marijuana at Work Poses Challenges for Employers
Health & Safety (PSHSA) – Radon - Bill 11 Updates
ORFA’s Original Energy Consultant Writes Memoirs
The Difference between Residential and Commercial Gas Detectors
Energy Champion – Beyond Measurement
Index of Advertisers
Facility Forum - Fall 2016 - ebelly1
Facility Forum - Fall 2016 - ebelly2
Facility Forum - Fall 2016 - cover1
Facility Forum - Fall 2016 - cover2
Facility Forum - Fall 2016 - 3
Facility Forum - Fall 2016 - 4
Facility Forum - Fall 2016 - 5
Facility Forum - Fall 2016 - 6
Facility Forum - Fall 2016 - 7
Facility Forum - Fall 2016 - 8
Facility Forum - Fall 2016 - Industry Watch
Facility Forum - Fall 2016 - Home Run Baseball Hits a Pedestrian
Facility Forum - Fall 2016 - 11
Facility Forum - Fall 2016 - 12
Facility Forum - Fall 2016 - 13
Facility Forum - Fall 2016 - All Granites are Not the Same
Facility Forum - Fall 2016 - 15
Facility Forum - Fall 2016 - 16
Facility Forum - Fall 2016 - 17
Facility Forum - Fall 2016 - 18
Facility Forum - Fall 2016 - 19
Facility Forum - Fall 2016 - 20
Facility Forum - Fall 2016 - Technically Speaking
Facility Forum - Fall 2016 - Risk Management – City Found Not Liable in Skating Injury
Facility Forum - Fall 2016 - 23
Facility Forum - Fall 2016 - Winterizing Pools
Facility Forum - Fall 2016 - 25
Facility Forum - Fall 2016 - 26
Facility Forum - Fall 2016 - 27
Facility Forum - Fall 2016 - 28
Facility Forum - Fall 2016 - Member Profile – Ross Rankin, RA Centre, Ottawa
Facility Forum - Fall 2016 - 30
Facility Forum - Fall 2016 - 31
Facility Forum - Fall 2016 - 32
Facility Forum - Fall 2016 - Use of Medical Marijuana at Work Poses Challenges for Employers
Facility Forum - Fall 2016 - Health & Safety (PSHSA) – Radon - Bill 11 Updates
Facility Forum - Fall 2016 - 35
Facility Forum - Fall 2016 - 36
Facility Forum - Fall 2016 - ORFA’s Original Energy Consultant Writes Memoirs
Facility Forum - Fall 2016 - 38
Facility Forum - Fall 2016 - 39
Facility Forum - Fall 2016 - 40
Facility Forum - Fall 2016 - The Difference between Residential and Commercial Gas Detectors
Facility Forum - Fall 2016 - 42
Facility Forum - Fall 2016 - 43
Facility Forum - Fall 2016 - Energy Champion – Beyond Measurement
Facility Forum - Fall 2016 - 45
Facility Forum - Fall 2016 - Index of Advertisers
Facility Forum - Fall 2016 - cover3
Facility Forum - Fall 2016 - cover4
Facility Forum - Fall 2016 - outsert1
Facility Forum - Fall 2016 - outsert2
Facility Forum - Fall 2016 - outsert3
Facility Forum - Fall 2016 - outsert4
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