THE HK500, HK300 & HK150 MOBILE GLYCOL HEATING SYSTEM

Transcription

1 THE HK500, HK300 & HK150 MOBILE GLYCOL HEATING SYSTEM

2 FASTER, SAFTER, LOWER COSTS WITH HEAT KING GROUND THAWING Tamarack Industries presents the Heat King Mobile Glycol Heating System - a faster, safer way to prepare foundation sites and cure concrete in cold weather. Heat King also saves on labor, speeds preparation, and lowers energy costs by as much as 80%. COMPUTER CONTROL The heart of the Heat King is its computer controlled system makes it simple to operate, continuously monitors all functions, and more efficiency starts the system. The computer sends startup signals at delayed intervals to each component in the system. Once each unit passes its high amp draw startup phase, the next component is powered up. All components are linked to corresponding lights on the control panel giving operators the ability to easily monitor all essential functions. CSA CERTIFIED The entire Heat King system is certified by the CSA and complies with UL standards for quality and safety assurance Evenly place the loops on an area of frozen ground up to 11,000 square feet. Then cover the hoses with a poly vapor barrier and insulating blankets to keep the heat and moisture directed into the ground. The two coil heaters warm the environmentally friendly propylene glycol in the reservoir to 180 degrees F. The field pump then circulates the heated glycol through the field hoses and back to the reservoir for re-heating. Now you are ready to thaw up to one foot of ground per day The environmentally friendly propylene glycol/water mixture is pumped through a continuous loop. Only heat goes into the ground. In the event a hose is cut the need for an environmental cleanup is unlikely Heat King s efficient coil heating system is designed for portability and rugged applications compared to boiler style heaters that are intended for stationary use. The Heat King uses only centrifugal pumps for the field and circulation loops. Safer and more reliable than positive displacement pumps, they are engineered to eliminate dangerous pressure situations. Each Heat King powered reel holds all of the field hoses. Operation is controlled by a heavy duty CSA & UL approved foot switch leaving the operations hands free to control the hose. The Heat King s reservoir is large enough to store all of the glycol in the system. In other systems the hoses are used to hold the glycol. This can pose a problem on concrete curing jobs where the hoses are going to be left in the slab. With the Heat King, the glycol can easily be blown back to the reservoir by using the on board air compressor. The Heat King s trailer features a rugged uni-body design and lb torsion axle for better towing. All doors can be locked during operation, protecting the Heat King and any tools or equipment inside from tampering or theft. Two powerful 250,000 BTUH burners. Fuel oil pre-heaters increase efficiency and insure cold weather startup. The Heat King 500 s design uses two burners rather than one which provides redundancy not found in competitors machines. In the unlikely event that one of the burners go out the second burner can continue running providing enough heat to save the job until both burners are running again. USE YOUR HEAT-KING FOR SPACE HEATING! For even more flexibility add HX-200 Heat Exchangers to your Heat-King System. Place them in the area to be heated, and connect their hoses to your Heat-King. Then heated glycol solution is pumped to the Heat Exchangers where it flows through their radiators and then back outside to the Heat King for reheating. Only clean, dry, safe heat is left in the building. SIMPLE & SAFE USER CONTROLS The Heat King features digital temperature control and monitoring. With the touch of a button on the control panel the Heat King s output temperature can be changed in 1 increments anywhere between degrees F. This provides the exceptional temperature control needed for proper concrete curing. Other machines use manual thermostats, which are inaccurate, difficult to adjust, and do not provide the temperature range to safely cure concrete. The glycol return temperature gauge is also digital thereby providing more precise monitoring of the thawing and curing temperatures. By monitoring the return temperature for changes the operator can tell what, if any, corrective action needs to be taken as weather changes over the course of the job.

3 HEAT DISTRIBUTED MORE EVENLY HEAT KING VS. CONSTRUCTION HEATERS The Heat King can come with 2, 4 or lengths of hose. So by the time the glycol reaches 700 it is back in the system being reheated. With most competitive machines there are only one or two 1500 loops. With more than twice as far to go, the glycol is much cooler in the last half of their loops. By using more lengths of shorter hose the Heat King can provide a higher and more consistent temperature to the field. Having more loops means that you can more easily put the heat where you need it, and each of the 8 loops has its own shut off valve for even greater control. Heat King can thaw up to one foot of frozen ground per day. The Heat King system works so well because it uses the moisture content of the soil to carry the heat down into the ground. Space heaters usually thaw the first foot of ground quickly but further progress is slowed causing time delays and high fuel expense. Another advantage of the Heat King system is that there is no need for expensive enclosures. Simply lay the hoses on the ground with a layer of poly vapor barrier and insulation blankets. Heat King burns a fraction of the fuel of traditional construction heaters and thawing is done in a fraction of the time so crews can get on the job faster. Heat King is also safer because there is no open flame and temperatures and pressures are much lower HEAT KING 2, 4 or LENGTH HOSES COMPETITION 1 or LENGTH HOSE(S) COST COMPARISON Heat King vs. Traditional Space Heaters (Typical cost to thaw 4 of frost on 11,000 sq. ft job) Number of Heaters Number of Days HEAT KING HK500 SPACE HEATERS 1 Heat King 3-500,000 BTUH Heaters Type of Fuel Diesel / Heating Oil Propane Fuel Consumption / Hour Fuel Consumption / Day Fuel Cost / Unit Fuel Cost / Job 2.2 Gallons (at 75% burn time) 23 Lbs / Hr / Heater 53 Gallons 1650 lbs $3.75 / Gallon $1.33 / lb $200 - $800 $43,890 - $65,000 CONCLUSION Of course fuel costs may be different in your area, but the difference in fuel consumption alone pays for the Heat King purchase or rental in no time. Now with a predictable way to thaw ground you can reduce idle labor and equipment costs, more accurately quote a job, and get on with construction up to 6 times faster! QUICK DISCONNECTS ON MANIFOLDS FOR UNPARALLELED FLEXIBILITY GROUND HEATER SYSTEM 6% HEAT LOSS HOT AIR SYSTEM 85% HEAT LOSS The field hoses on the Heat King have quick couplers with check valves at both ends that plug into the supply and return manifolds. This prevents glycol from leaking during connection and disconnection of hoses. Should the Heat King need to be moved during a job simply quick disconnect the hoses from the manifolds and move the unit. The field hoses in many competitive machines are permanently fixed, making them more susceptible to damage when unwinding the hose and very difficult to move in the middle of a job. For further flexibility, a set of remote manifolds can be added to the Heat King, allowing you to run your hoses off of manifolds are up to 100 away from the unit. POLY VAPOR BARRIER 4ft HEAT TRANSFER HOSE HOT SOIL WARM SOIL FROZEN SOIL INSULATION BLANKETS TENT WARM SOIL FROZEN SOIL HEATER PROPANE

4 WILL CHANGE THE WAY YOU FEEL ABOUT WINTER CONSTRUCTION 208 FT 50 FT RETURN MANIFOLD FLUID RETURNS FROM FIELD heat king HEATER PUMP reservoir SUPPLY MANIFOLD DUAL COIL HEATERS FIELD PUMP HEAT KING VS. CONSTRUCTION HEATERS Heat King s unique double loop design provides increased reliability and more consistent heat for better control. The two loops in the system are referred to as the heater loop and the field loop. In the heater loop, glycol is pumped from the reservoir. In the field loop, heated glycol is pumped from the reservoir through the field hoses that are laid out to do the thawing or curing and then back to the reservoir for re-heating. On the output side the large amount of preheated glycol in the reservoir helps to provide tighter control of the temperature for concrete curing applications. Burners cycle on and off according to their temperature control. In competitive heaters, the field temperatures can fluctuate drastically depending on whether the burners are firing or not at a given time. This illustration shows the remarkable coverage you can achieve with the Heat King. From 2,800 sq feet to 11,200 sq feet of thaw power! The Heat King s computer controls the firing of the burners according to the temperature of the glycol in the reservoir not the heater. This reduces the wide temperature fluctuations seen with other heaters and provides the tighter temperature control needed to properly cure concrete. Boiler shock occurs when the difference in temperature between the glycol going into and coming out of heater is too high. This can damage or even destroy the heater. By adding two loops and a large reservoir to our design we have provided a buffer to lower that severe difference in temperature, thereby eliminating this condition. In competitive machines, cooled glycol is pumped directly from the field into the heater, creating a high chance of boiler shock.

5 HK 150 THE HK150 MOBILE GLYCOL HEATING SYSTEM The HK150 is the smallest of the Heat King family. This unit was designed with the residential contractor in mind. Quiet, compact, and efficent, yet powerful enough to thaw ground, cure concrete, or provide temporary heat for up to two new home sites at once. FEATURES Thaw up to 2,800 ft 2 Cure up to 5,600 ft 2 Temporary Heat up to 6,200 ft 2 Computer controlled System Digital Temperature Monitoring Large Glycol Reservoir Large Access Doors Double Loop Technology Enclosed Electric Hose Reel CSA / UL Certified The HK150 has all of the features and technology developed for the HK500 in a smaller package. Bi-directional Powered Reel Large Doors for Easy Access Rubber Torsion Axle Remote Supply & Return Manifolds Durable Coil Style Heater Optional On-Board Air Compressor

6 HK 150 USER FRIENDLY CONTROLS The control panel features large, easy to use switches, digital supply and return temperature controls with warning and operation lights for all components. The entire system is protected by a ground fault interrupt breaker, a large emergency stop button, and is CSA certified for safety assurance. DOUBLE LOOP TECHNOLOGY By using shorter hoses, more fluid, and higher efficiency pumps with increased flow, the Heat King provides more consistent temperature to the field for better concrete curing and ground thawing results. HK150 SPECIFICATIONS Hose Supply Manifold Return Manifold Ground Thawing Capacity Concrete Curing Capacity Temporary Heating Capacity Field Pump Circulating Pump Fuel Tank Run Time ft Field Hoses 2-5/8 & 1-1 1/4 quick connect 2-5/8 & 1-1 1/4 quick connect 2,800 ft 2 5,600 ft 2 6,200 ft 2 (Varies with R-Value) 1/2 Hp Centrifugal 1/7 Hp Centrifugal 92 US GAL Up to 140 Hours Heater Capacity Glycol Tank Electrical Requirements Generator (Optional) Axle Hitch Overall Length Overall Width Overall Height Weight (Fuel Empty/Full) 150,000 BTUH Heating Fuel Input 75 US GAL 1-120V AC 15A Circut 1-3,300W 1-5,000lb Torsion Axle, Brakes 2 Ball (Pintle also available) ,270 / 4,380 lbs P.O. Box 234, Station L Telephone: Winnipeg, Manitoba Toll Free: Canada R3H 0Z5 Fax: Tamarack industries Specifications subject to change without notice. Printed in Canada - May 2011

7 HK 300 THE HK300 MOBILE GLYCOL HEATING SYSTEM The HK300 is the midsize heater of the Heat King family. This unit was designed with the residential contractor in mind. Quiet, compact and efficient, yet powerful enough to thaw ground, cure concrete or provide temporary heat for up to four new home sites at once. FEATURES Thaw up to 5,600 ft 2 Cure up to 11,200 ft 2 Temporary Heat up to 12,000 ft 2 Computer controlled System Digital Temperature Monitoring Large Glycol Reservoir Large Access Doors Double Loop Technology Enclosed Electric Hose Reel CSA / UL Certified The HK300 has all of the features and technology developed for the HK500 in a smaller package. Large Glycol Reserve Large Doors for Easy Access Rubber Torsion Axle Bi-directional Powered Reel Durable Coil Style Heater Optional On-Board Air Compressor

8 HK 300 USER FRIENDLY CONTROLS The control panel features large, easy to use switches, digital supply and return temperature controls with warning and operation lights for all components. The entire system is protected by a ground fault interrupt breaker, a large emergency stop button, and is CSA certified for safety assurance. DOUBLE LOOP TECHNOLOGY By using shorter hoses, more fluid, and higher efficiency pumps with increased flow, the Heat King provides more consistent temperature to the field for better concrete curing and ground thawing results. HK300 SPECIFICATIONS Hose Supply Manifold Return Manifold Ground Thawing Capacity Concrete Curing Capacity Temporary Heating Capacity Field Pump Circulating Pump Fuel Tank Run Time ft Field Hoses 4-5/8 & 1-1 1/4 quick connect 4-5/8 & 1-1 1/4 quick connect 5,600 ft 2 11,200 ft 2 12,000 ft 2 (Varies with R-Value) 1/2 Hp Centrifugal 1/2 Hp Centrifugal 92 US GAL Up to 73 Hours Heater Capacity Glycol Tank Electrical Requirements Generator (Optional) Axle Hitch Overall Length Overall Width Overall Height Weight (Fuel Empty/Full) 273,000 BTUH Heating Fuel Input 96 US GAL 1-120V AC 20A Circut 1-5,000W 1-5,000lb Torsion Axle, Brakes 2 Ball (Pintle also available) ,270 / 4,380 lbs P.O. Box 234, Station L Telephone: Winnipeg, Manitoba Toll Free: Canada R3H 0Z5 Fax: Tamarack industries Specifications subject to change without notice. Printed in Canada - May 2011

9 HK 500 THE HK500 MOBILE GLYCOL HEATING SYSTEM The HK500 is the most powerful of the Heat King family. This unit was designed for big jobs in mind. Quiet and efficent, yet powerful enough to thaw 11,200 ft 2 of ground, cure 22,400 ft 2 of concerete or provide temporary heat for up to 15,000 ft 2. FEATURES Thaw up to 11,200 ft 2 Cure up to 22,400 ft 2 Temporary Heat up to 15,000 ft 2 Computer controlled System Digital Temperature Monitoring Large Glycol Reservoir Large Access Doors Double Loop Technology Enclosed Electric Hose Reel CSA / UL Certified The HK500 features: Large Glycol Reserve Large Doors for Easy Access Rubber Torsion Axle Bi-directional Powered Reel Durable Coil Style Heater On-Board Air Compressor

10 HK 500 USER FRIENDLY CONTROLS The control panel features large, easy to use switches, digital supply and return temperature controls with warning and operation lights for all components. The entire system is protected by a ground fault interrupt breaker, a large emergency stop button, and is CSA certified for safety assurance. DOUBLE LOOP TECHNOLOGY By using shorter hoses, more fluid, and higher efficiency pumps with increased flow, the Heat King provides more consistent temperature to the field for better concrete curing and ground thawing results. HK500 SPECIFICATIONS Hose Supply Manifold Return Manifold Ground Thawing Capacity Concrete Curing Capacity Temporary Heating Capacity Field Pump Circulating Pump Fuel Tank Run Time ft Field Hoses 8-5/8 & 2-1 1/4 quick connect 8-5/8 & 2-1 1/4 quick connect 11,200 ft 2 22,400 ft 2 15,000 ft 2 (Varies with R-Value) 3/4 Hp Centrifugal 1/2 Hp Centrifugal 92 US GAL Up to 60 Hours Heater Capacity Glycol Tank Electrical Requirements Generator (Optional) Axle Hitch Overall Length Overall Width Overall Height Weight (Fuel Empty/Full) 436,000 BTUH Heating Fuel Input 130 US GAL 2-120V AC 15A Circut 1-5,500W 1-7,000lb Torsion Axle, Brakes 2 5/16 Ball (Pintle also available) (Including Heater Vent) 5,500 / 6,250 lbs P.O. Box 234, Station L Telephone: Winnipeg, Manitoba Toll Free: Canada R3H 0Z5 Fax: Tamarack industries Specifications subject to change without notice. Printed in Canada - May 2011

11 GROUND THAWING & CONCRETE CURING REFERENCE GUIDE

12 TABLE OF CONTENTS Principles of Ground Thawing 2 Ground Thawing Illustration 3 Principles of Concrete Curing 5 Slab on Grade Illustration 1 6 Temperature Above 25 F - Hose Reused Slab on Grade Hose Illustration 2 7 Temperature Below 25 F - Hose Abandoned Grade Beams & Walls (up to 10 ) Illustration 8 Temperature Below 10 F - Hose Abandoned Grade Beams & Walls (10-24 ) Illustration 1 9 Temperature Above 10 F - Hose Reused Grade Beams & Walls (10-24 ) Illustration 2 10 Temperature Below 10 F - Hose Abandoned

13 Principles of Ground Thawing The Soil Soil particles do not freeze, it is the moisture around the particles that freezes. Think about a bucket of pea gravel. If it is dry, it can be at 40 F and it is still as easy to move the stones around as if it were +70 F. Now fill the bucket with water to the top of the gravel and let it freeze. Now the whole thing is as hard as a rock! When we are thawing ground, we are thawing the water around the soil particles. It takes a lot of energy to change snow or ice to liquid water. If there is any snow or ice on the thaw site, remove it mechanically. It is far more efficient than trying to melt it with the Heat King. Save all of the energy for thawing the ground, not melting surface ice and snow. Frozen ground is a great barrier for water flow. Complete the Thaw. If you do not let the ground thaw all of the way down, the water that has melted will have no where to go, so it will stay on the surface. Once the frost has been fully removed, the water will drain back down to the water table, and the site will not be as muddy. Heat Transfer Water in its liquid form is a great conductor of heat. It is much better than air. Think about the air in a warm oven. You can put your hands in a warm oven to get out a plate of food, even if the oven is at 200 F. If you put your hands in water that is at 200 F even for a couple of seconds you will scald yourself. The Heat King uses this 2 ways, first to transfer heat from heater to the ground, and then to transfer heat from the surface to the lower levels of ground. Heat does not necessarily rise, it moves from warm things to cold things. Sit on a steel bench in your underwear in winter and you will never forget this fact! The steel is cold, you are warm, the heat goes from you to the bench, even though the bench is below you. Hot air rises because it is lighter than cold air, and this is why some people think heat always rises. It takes a lot of heat energy to change water from liquid to vapor. If this water vapor escapes, it takes all of that heat with it. Rather than let it vent, convert the vapor into water so that it can go back down into the ground and continue the thawing process. When ground thawing, ALWAYS use a vapor barrier. Don t let anyone tell you that because the insulating blankets have poly covering that they are good enough. They probably are not. Few things will slow a thaw more than if water vapor is venting. Another nice benefit is if you put the vapor barrier down before the hoses, it will keep the hoses much cleaner when the thaw is complete. 2

14 GROUND THAWING HEAT KING THAW PLAN Remove all the surface ice and snow from the site Determine the depth of the frost FROST VAPOR BARRIER FROZEN GROUND Place a polyethylene vapor barrier over the frozen ground. Failure to do so will dramatically lengthen the time required to complete the thaw Place hoses on the area to be heated. Spacing the hoses is determined by the frost depth. Generally, use all of the hose on the reel, even if it is not needed. This will speed the thaw. Preheat the Heat King to 180 degrees F. R15 INSULATION BLANKETS VAPOR BARRIER Place insulation blankets over the hoses. Blankets should be poly clad. The more blankets the better, but they should provide an R factor of R15. If it is above 25 F and there is less than 2 feet of frost R10 is recommended. Start the thaw. Do not stop until all of the frost is removed of the water will not be able to drain down to the water table. 3

15 GROUND THAWING HEAT KING THAW PLAN HOSE LAYOUT frost depth hose spacing apart 4 16 apart apart With this configuration and ideal soil conditions you can expect a thaw of 1 per day for the first 3 and 1/2 per day to 6. Some overriding factors which slow the rate of thaw are: Soil Compaction If the area to be thawed is compacted the rate of thaw may slow to 1/2 per day or less. Soil Moisture If the moisture content in the soil is low as in the case of dry clay, the rate will slow to 1/2 per day. The same is true for soil where the moisture content is very high. As in the case of saturated silt, the rate of thaw may slow to 1/2 per day or less. Outdoor Temperature The outdoor temperature can also effect the rate of thaw. If there are high winds and the temperature is at or below -30 F, add hay bales on top of the blankets for further insulation. These are general guidelines to follow for optimum performance of the Heat King under typical operating conditions. Extreme soil or weather conditions may call for different configurations. Call Tamarack Industries if you need further help with your thaw plan. Always have your structural or civil engineer approve your plan. 4

16 Principles of Concrete Curing Concrete does not dry; it cures. This is a chemical reaction that puts out heat, especially during the first day. The warmer the concrete the faster it cures. When it is frozen or is very cold, it stops curing altogether. Concrete goes through several stages during it s use. It comes to the site in a liquid or plastic form when it can be placed, consolidated, screened and bull floated. After an initial set (6-8 hours at F) it can be finished through floating, and troweling or brooming. Final set is usually another 6 hours at 70 F. It is now hard, but far from fully cured. It continues to cure and gain strength as time goes on, so long as it is warm enough. After 6 or 7 days at F concrete has generally achieved 75% of its design strength. At this point forms can be stripped and loads applied. After 28 days concrete has achieved its design strength, although it will continue to cure and gain strength for up to a year. Conditions needed for a good cure Moisture The concrete curing process uses up water, therefore it must have moisture to continue curing. If concrete gets too hot, the moisture will evaporate and it will stop curing. This is why we don t run the Heat King at 180 F during curing. A temperature of F The lower the temperature, the slower the cure. This wastes time on the project. There is also a risk of freezing. If concrete freezes before the final set (about 12 hours at 70 F) it may have to be removed. If concrete freezes after the initial set, it will stop curing. With the Heat King you can protect the concrete from freezing, and maintain the correct temperature to keep the concrete curing. Goals of Concrete Curing The goals in concrete curing in cold conditions are: Don t let the concrete freeze Keep the concrete above 65 F so that it cures properly and quickly Keep the concrete below 80 F so that it won t bake and loose moisture 5

17 CONCRETE CURING SLAB ON GRADE ABOVE 25 DEGREES F (HOSE IS RE-USED) Thaw the ground according to the Heat King Thaw Plan INSULATION BLANKETS VAPOR BARRIER Prepare the ground for concrete Place rebar Preheat the ground, run Heat King at 180 F, place hoses at 24 centers, put on insulating blankets and let the ground heat to at least 85 F Remove insulating blankets and rewind the hoses 75 F CONCRETE Turn the Heat King down to 85 F Bring in the concrete at 75 F Place 75 F concrete GROUND IS F R15 INSULATION BLANKETS VAPOR BARRIER SLAB As soon as the concrete has reached the final set put on a vapor barrier Place hoses at no more than 20 centers, if you have extra hose use it. The more hose that you use, the more even the heat Place R 15 of insulating blankets Monitor the return temperature on the Heat King. Adjust the Heat King until the Return temperature is in the F range Keep the heat on until the desired design strength has been achieved (this will not be less than 7 days This is a general guideline, have your structural or civil engineer approve your plan. 6

18 CONCRETE CURING SLAB ON GRADE BELOW 25 DEGREES F (HOSE ABANDONED) Thaw the ground according to the Heat King Thaw Plan INSULATION BLANKETS VAPOR BARRIER Prepare the ground for concrete Place hoses at 20 centers Start preheating the ground, run Heat King at 180 F Place rebar above hose Put on insulating blankets and let the ground heat to at least 85 F 75 F CONCRETE Remove the insulating blankets Turn the Heat King down to 85 F Bring in the concrete at 75 F Place 75 F concrete on top of hoses GROUND IS F 7 R15 INSULATION BLANKETS VAPOR BARRIER SLAB As soon as the concrete has reached the final set put on a vapor barrier and R 15 insulating blankets Monitor the return temperature on the Heat King. Adjust the Heat King until the return temperature is in the F range Keep the heat on until the desired design strength has been achieved (This will not be less than 7 days) You can now use the system as a temporary radiant floor heating system until the permanent heating system is in place. Do not run the Heat King above 85 F until the concrete is fully cured This is a general guideline, have your structural or civil engineer approve your plan.

19 CONCRETE CURING GRADE BEAMS AND WALLS BELOW 10 DEGREES F (HOSE ABANDONED ) WALLS UP TO 10 THICK HOSE REBAR 4' DISTANCE BETWEEN HOSES Run hose at bottom of wall in the middle of the forms Run another hose through the wall for every 4 of height or portion thereof Run a hose near the top of the wall HOSES 2' APART 180 F INSULATION BLANKETS Run hoses on outsides of form at bottom, and every 2 up the forms (both sides) Put at least R 15 of insulating blankets over forms Run the Heat King at 180 F to preheat forms and rebar for at least 3 hours 75 F CONCRETE Remove the insulating blankets Turn the Heat King down to 85 F Pour 75 F concrete VAPOR BARRIER INSULATION BLANKETS Replace vapor barrier, insulating blankets and wrap tight Monitor the return temperature on the Heat King Adjust the Heat King until the return temperature is in the F range Keep the heat on until the desired design strength has been achieved. (This will not be less than 7 days) This is a general guideline, have your structural or civil engineer approve your plan 8

20 CONCRETE CURING GRADE BEAMS AND WALLS ABOVE 10 DEGREES F (HOSE IS RE-USED ) WALLS THICK HOSES 2' APART REBAR INSULATING BLANKETS Run hoses on outsides of form at bottom, and every 2 up the forms (both sides) Put at least R 15 of insulating blankets over forms 180 F Run the Heat King at 180 F to preheat forms and rebar for at least 3 hours REBAR 75 F CONCRETE HOSES Remove the insulating blankets Turn the Heat King down to 100 F Pour 75 F concrete VAPOR BARRIER INSULATING BLANKETS Cover the forms with a vapor barrier, insulating blankets and wrap tight. It is important that there is an air tight, well insulated envelope around the forms Monitor the return temperature on the Heat King Adjust the Heat King until the return temperature is in the F range Keep the heat on until the desired design strength has been achieved. (This will not be less than 7 days) This is a general guideline, have your structural or civil engineer approve your plan 9

21 CONCRETE CURING GRADE BEAMS AND WALLS BELOW 10 DEGREES F (HOSE ABANDONED ) WALLS THICK REBAR WALL 10" - 24" THICK 4' DISTANCE BETWEEN HOSES Run 2 hoses at bottom of wall in forms within 2 of form Run another 2 hoses through the wall for every 4 of height or portion thereof Run 2 hoses near the top of the wall within 2 of form HOSES 2' APART INSULATING BLANKETS Run hoses on outsides of form at bottom, and every 2 up the forms (both sides) Put at least R 15 of insulating blankets over forms Run the Heat King at 180 F to preheat forms and rebar for at least 3 hours 180 F 75 F CONCRETE Remove the insulating blankets Turn the Heat King down to 85 F Pour 75 F concrete INSULATING BLANKETS Place vapor barrier, replace insulating blankets and wrap Monitor the return temperature on the Heat King Adjust the Heat King until the return temperature is in the F range Keep the heat on until the desired design strength has been achieved. (This will not be less than 7 days) This is a general guideline, have your structural or civil engineer approve your plan tight 10

22 Tamarack industries P.O. BOX 234, Station L Winnipeg, Manitoba Canada R3H 0Z5 Toll-Free Phone Fax