Water Cooled Portables
1-3 Ton Capacity
These types of units need a source of domestic water and drain to facilitate the removal of the heat energy from the space being cooled.
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Placement
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Position the unit in the space to be cooled and in the location it will most effectively distribute cooled air. Consider proximity to people (for both drafts and noise), power source, water source and drain when determining the best location.
Electrical
- Have a licenced electrician hook up the proper cable and breaker combination to electrically power the unit. Some units (1 and 1.5 ton capacity) can run on a 115 volt circuit, others require 220 volts and use a Hubbell twist lock plug.
Setup - Supply Water (Water In) and Return Water (Water Out)
The 1 to 3 ton water cooled portables typically use 3/8” diameter black high pressure water hoses encased over most of their length by a blue sleeve and collectively called a “Hose Bundle”. Occasionally these units could be supplied with individual 3/8” hoses as well, but we’ll assume only Hose Bundle will be used. Though the hoses are all black, they are marked at each end with different colours.
BLUE for Supply Water (Water In)
RED for Return Water (Water Out) which should be warm.
GREEN for Condensate water (Condensate)
The type of fitting on the end of each hose may vary depending on the how it is connected to the water supply. Typical hose bundle lengths are 25 and 50 feet.
- Leaving enough hose to connect to the Water Source (Water In line) and to reach the drain, run the hose bundle from the water source to the unit. To prevent tripping hazards and other problems, it is best to run this bundle through a false ceiling space to keep it out of the way. Make sure that there are no kinks in the hoses that would restrict water flow and that any connections are tight and secure using two wrenches (do not overtighten). Before attaching each of the three lines to the unit, make sure that any excess hose is arranged neatly by the unit and that there are no sharp turns when making the connections to the unit. Again, use two wrenches on each connection to make sure it is secure without overtightening them.
- Return to the water source and connect the Supply Water or Water In line (Blue coded hose) to the water source under the sink using our custom sink kit. We will email or fax copies of a completed installation to you. Secure the Supply Water hose in place, minimizing any impact on the use of the sink. Tie the drain hoses (Return Water and Condensate) in place to make sure that they stay in place and check that the drain is fully open and that the water drains quickly away.
- Turn the Supply Water on to pressurize the hose and CHECK each and every connection carefully to make sure there are no drips or leaks.
Condensate
- All air conditioning units remove humidity or water vapour from the air that they are cooling. This humidity is captured in the form of water and collects inside our equipment in a condensate reservoir.
A condensate pump is used to automatically pump the condensate out of the machine and through the condensate drain line that is included in the hose bundle and colour coded green.
Operation
- When all of the installation requirements have been satisfied, including a check for water leaks, and the unit is powered on, you are ready to operate the machine. These units are controlled by a thermostat mounted on the front of the unit. Our Cool Air technicians can assist with setting of the thermostat if necessary.
Start (assumes use of white Robertshaw thermostat)
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To start the cooling process, the LCD screen of the Thermostat must read COOL. If it does not, then lift up the cover from the bottom and press the MODE button until the screen does read COOL. Assuming that the set point temperature is below the ambient room temperature, the Supply Air fan will start to blow air after a few seconds and the compressor will start after a countdown of up to 2 minutes. The Supply air fan can be set to run independently of the compressor so it will continue running even when there is no demand for cooling by pressing the fan button so that the fan icon appears on the LCD screen.
- Once you have selected the COOL mode, and assuming that the ambient air temperature is higher than the SET POINT temperature indicated by the thermostat, a countdown of up to 2 minutes will begin.
- The initial temperature shown on the LCD display is the actual room temperature. The desired temperature (SET POINT temperature) is set by pushing either of the UP or DOWN arrows.
- After the countdown period has elapsed, the unit will switch the compressor and the condenser fan on, starting the cooling process.
- The Evaporator fan (the one that supplies air to the room) can be set to continuous operation by pushing the fan button until the fan icon is lit in the LCD display. This fan will then operate continuously, regardless of whether the unit is cooling or not.
- Simultaneously press the UP and DOWN arrows to switch the unit between Celsius (C) and Fahrenheit (F) temperature display.
- In the event of a power failure, the unit will restart in the same MODE and at the same SET POINT it was at prior to the power loss.
- The OUTDOOR and DAY/NIGHT buttons are not used in your application.
Stop
- To stop the machine, simply press the MODE button on the Thermostat till it reads OFF and the cooling process will stop. The fan may need to be turned off too if it is set to run continuously. The unit can be restarted immediately but the cooling process will not start until after the mandatory countdown of about 2 minutes.
These are complex machines and if you follow these installation instructions closely you should have trouble free usage. However if something should go wrong with the unit or you are unsure of proper procedures please call us immediately – Cool Air Rentals Ltd – 604.253.4171. Continued improper use of any unit can result in damage to the unit and costly repairs.
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