How to change 20 liters per minute into volume in liters per hour

the low pressure/flow minimum is for safety and protection of unit and no adjustment to do so

Hi Sharee:
The square footage is 14 times 70 equals 980 square feet.
That would be the Floor Area.
Air conditioners sometimes need to know the building volume so if you have 8 ft ceilings you would multiple 980 by 8 to get 7,840 CUBIC FEET.
Air exchange is typically are rated at cubic feet per minute and required as "specified Air Changes per Hour.
An example for your trailer would be 1/2 air change per hour required per building code. 7,840 times 1/2 equals 3920 cubic feet per hour. Divide that by 60 to get 65 cubic feet per minute.
That would be the minimum air change capacity for your air conditioner if it was also providing required ventilation.

The voltmeter test provides general indicator of battery condition. Check the voltage of the battery to verify that it is in a 100 per cent fully charged condition. If the open circuit or disconnected voltage reading is below 12.6 V, charge the battery and then recheck the voltage after the battery has set for one to two hours. If the voltage reading is 12.8 V or above, perform the load test described below.



The load test measures battery performance under full current load and is the best indicator of battery condition. Load testing a battery tat is not FULLY CHARGED i.e. at 12.8 VDC can permanently damage it. Fully charge it first and then let it stand for at least an hour before the load test is done. You also need a load tester AND you should know how to perform a load test. Often the best way to load test a battery will be to take it to a battery shop and have it done there.



VOLTAGE and STATE OF CHARGE FOR AGM BATTERIES IS:

12.8 VDC is 100 per cent

12.6 VDC is 75 per cent

12.3 VDC is 50 per cent

12.0 VDC is 25 per cent

11.8 VDC is 0 per cent



COLD CRANKING AMPERAGE (CCA) for a DYNA battery is 270

Battery Charging Rates/Times (Approximate)



FOR A 19 AMP HOUR DYNA AGM BATTERY



BATTERY STATE OF CHARGE is 12.8 VDC is 100 per cent Charge; Rate of Charge is N/A



BATTERY STATE OF CHARGE is 12.6 VDC is 75 per cent Charge; Rate of Charge at 3 AMP is 1.75 hours at 6 AMP is 50 minutes at 10 AMP is 30 minutes at 20 AMP is 15 minutes



BATTERY STATE OF CHARGE is 12.3 VDC is 50 per cent Charge; Rate of Charge at 3 AMP is 3.5 hours at 6 AMP is 1.75 hours at 10 AMP is 1 hour at 20 AMP is 30 minutes



BATTERY STATE OF CHARGE is 12.0 VDC is 25 per cent Charge; Rate of Charge at 3 AMP is 5 hours at 6 AMP is 2.5 hours at 10 AMP is 1.5 hours at 20 AMP is 45 minutes



BATTERY STATE OF CHARGE is 11.8 VDC is 0 per cent Charge; Rate of Charge at 3 AMP is 6 hours, 40 minutes at 6 AMP is 3 hours, 20 minutes at 10 AMP is 2 hours at 20 AMP is 1 hour



The figures listed above assume that the battery is charging at room temperature. If warmer than room temperature, use a slightly shorter charging time. If colder, use a slightly longer charging time.



The use of constant current chargers to charge maintenance free batteries is not recommended. Any overcharge will cause dry out and premature battery failure. If a constant current charger is the only type available, do not exceed the charge times listed above and do not continue charging the battery if it gets hot. When charging, never exceed 15 volts for more than 30 minutes.



If the battery gets hotter than 110 degrees F or 43 degrees C during charging, discontinue charger and allow the battery to cool. Overheating may result in plate distortion, internal shorting, dry out and/or other damage.

I will assume that the percentage is per volume (20% per volume, 40 per volume.
Let x be the number of liters of the 20% solution.
What is the volume of alcohol in x-liters @20%?-----> .2x
What is the volume of alcohol in the 40 liters of solution @ 50%? Obviously 20 liters.
Amount of alcohol in the two solutions =.2x+20
After you mix the two solutions what is the resulting volume?
Resultant volume=x+40
Percentage of alcohol in final solution: 30% or 0.3
Quantity of alcohol in final solution =.3*(x+40)

When mixing the two solutions, no alcohol is lost: The amount of alcohol before mixing is equal to the volume of alcohol after mixing
(.2*x+.5*40) =.3*(x+40)
Solve this equation for x. (Show your work) You get x=36 Liters.
Check the result by replacing x in the equation.

I will assume that the percentage is per volume (20% per volume, 40 per volume.
Let x be the number of liters of the 20% solution.
What is the volume of alcohol in x-liters @20%?-----> .2x
What is the volume of alcohol in the 40 liters of solution @ 50%? Obviously 20 liters.
Amount of alcohol in the two solutions =.2x+20

After you mix the two solutions what is the resulting volume?
Resultant volume=x+40

Percentage of alcohol in final solution: 30% or 0.3
Quantity of alcohol in final solution =.3*(x+40)


When mixing the two solutions, no alcohol is lost: The amount of alcohol before mixing is equal to the volume of alcohol after mixing

(.2*x+.5*40) =.3*(x+40)
Solve this equation for x. (Show your work) You get x=36 Liters.
Check the result by replacing x in the equation.

The milligram is the 1/1000 part of a gram. The gram (g) is a unit of quantity of substance or mass.
The milliliter (or millilitre) is the 1/1000 part of a liter (or litre). The liter is a unit of capacity (or volume).
In truth you cannot compare units of mass and units of volume because each unit measures mass and the other volume. Similarly people express distance (kilometers, or miles) in minutes or hours. How far is the store? Instead of saying 10 or 20 miles they would say half an hour. Well half an hour of driving in the city cover a lot less distance than half an hour on the highway or half an hour for the bullet train.
When you are talking about water in its liquid state (not vapor nor ice) at a temperature of about 4 degrees Celsius, 1 gram of water occupies 1 cm^3 or 1 mL. So 1/1000 of a gram of liquid water occupies 1/1000 of a milliliter or 1/1000 000 of a liter.
A volume of 5 mL of liquid water has a mass of 5 g or 5 000 mg.

The milligram is the 1/1000 part of a gram. The gram (g) is a unit of quantity of substance or mass.
The milliliter (or millilitre) is the 1/1000 part of a liter (or litre). The liter is a unit of capacity (or volume).
In truth you cannot compare units of mass and units of volume because each unit measures mass and the other volume. Similarly people express distance (kilometers, or miles) in minutes or hours. How far is the store? Instead of saying 10 or 20 miles they would say half an hour. Well half an hour of driving in the city cover a lot less distance than half an hour on the highway or half an hour for the bullet train.
When you are talking about water in its liquid state (not vapor nor ice) at a temperature of about 4 degrees Celsius, 1 gram of water occupies 1 cm^3 or 1 mL. So 1/1000 of a gram occupies 1/1000 of a milliliter or 1/1000 000 of a liter.

I cannot find a manual for the Darlac DW253.
It appears the timer is set by moving each selector knob.
http://www.watermate.co.uk/secure/uploads/DW253%20(Small)%20new%20darlac%20pop.jpg

Knob on right is Run Time:
This is how many minutes timer will run each time.
Set run time from 1 minute to 120 minutes.
Knob on right also has ON-OFF override.

Knob on left is Frequency:
This is how frequently the timer will turn ON. Once per hour, once per each 2 hours ... once per 24 hours ... once per 72 hour ... once per week.

So set frequency to 48 and set run time to 20, then every 48 hours the water will turn on for 20 minutes.
To turn timer off, move right knob to OFF.
For continuous watering, turn same knob to ON.

This timer is battery-powered, probably 9 Volt, but maybe AA.
Battery carriage appears to be located on front below the function knobs.
Typically, water timer batteries last one season.

Timer can be connected to household spigot, or connected to any passive water supply for example rain barrel or tank.
Appears to have standard female hose thread on top, or possibly 1/2 pipe thread, and quick connection on bottom.

Plastic water timer exposed to freezing temperatures can crack. Drain water out of timer during cold weather.
Generally if water timer stops working: replace battery, clean battery terminals, and if functionality is not restored, then buy another timer.

Add a comment to fill out the missing details.

The following are examples of expressions:
2
x
3 + 7
2 × y + 5
2 + 6 × (4 - 2)
z + 3 × (8 - z)
Example:
Roland weighs 70 kilograms, and Mark weighs k kilograms. Write an expression for their combined weight. The combined weight in kilograms of these two people is the sum of their weights, which is 70 + k.
Example:
A car travels down the freeway at 55 kilometers per hour. Write an expression for the distance the car will have traveled after h hours. Distance equals rate times time, so the distance traveled is equal to 55 × h..
Example:
There are 2000 liters of water in a swimming pool. Water is filling the pool at the rate of 100 liters per minute. Write an expression for the amount of water, in liters, in the swimming pool after m minutes. The amount of water added to the pool after m minutes will be 100 liters per minute times m, or 100 × m. Since we started with 2000 liters of water in the pool, we add this to the amount of water added to the pool to get the expression 100 × m + 2000.
To evaluate an expression at some number means we replace a variable in an expression with the number, and simplify the expression.
Example:
Evaluate the expression 4 × z + 12 when z = 15.
We replace each occurrence of z with the number 15, and simplify using the usual rules: parentheses first, then exponents, multiplication and division, then addition and subtraction.
4 × z + 12 becomes
4 × 15 + 12 =
60 + 12 =
72
Example:
Evaluate the expression (1 + z) × 2 + 12 ÷ 3 - z when z = 4.
We replace each occurrence of z with the number 4, and simplify using the usual rules: parentheses first, then exponents, multiplication and division, then addition and subtraction.
(1 + z) × 2 + 12 ÷ 3 - z becomes
(1 + 4) × 2 + 12 ÷ 3 - 4 =
5 × 2 + 12 ÷ 3 - 4 =
10 + 4 - 4 =
10.

hope that help you

9-10 litres per minute for <= 125 litre capacity

12-13 litres per minute for 160 to 400 litre capacity

15-17 litres per minute for >= 500 litre capacity