Hydro kits GH
To avoid discomfort caused by a water temperature drop in the defrost cycle, or tripping of the antifreeze thermostat in small volume installations, it is necessary to use an accumu- lator tank to increase the thermal inertia of the installation.
Water volumes of the GH kits and their compatibility with the
YLCC / | Litres |
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42 | 200 |
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62 | 260 |
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82 | 260 |
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102 | 600 S |
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122 | 600 S |
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152 | 600 P |
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Nevertheless, in each case the minimum volume needed for the installation should be checked.
Circulating pump
For satisfactory operation of the units, it is essential to select an adequate pump to supply sufficient flow and pressure to the hydraulic circuit. Use the following table for this purpose.
YLCC/ | Approximate pump | Minimum pressure supplied | |||
flow ∆t 5°C | by the pump | ||||
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unit |
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l/h | l/s | m WG | kPa | ||
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42 | 6 700 | 1.86 | 15 | 147 | |
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62 | 10 100 | 2.8 | 15 | 147 | |
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82 | 13 500 | 3.75 | 15 | 147 | |
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102 | 17 200 | 4.77 | 15 | 147 | |
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122 | 19 900 | 5.53 | 15 | 147 | |
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152 | 25 800 | 7.16 | 15 | 147 | |
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Flow switch
The hydraulic circuit to which the unit is connected is equipped with a flow switch that avoids operation of the air conditioner without sufficient water flow. The installation of this switch is absolutely indispensable, as well as checking correct setting and operation during installation commissioning.
Application to YLCC/YLCC-H units
These flow switches can be used on water or glycol circulat- ing tubing. They are designed for locking; that is to sea, pro- tection against a lack of liquid circulation. The switch is to be mounted on horizontal tubing, in a section having a straight run of at least five times the tubing diameter on each side of the flow switch. Do not install near valves, elbows or open- ings. Installation should be such that terminals are accessi- ble for easy connection. The switch is marked with the flow direction. For 1" tubing, mount the switch on a standard 1" x 1" x 1" tee joint. Use a reducer tee on larger size tubing to keep the flow switch set to same and achieve an adequate length of the tab in the flow current. Example: use a 2" x 2" x 1" tee for 2" tubing. If a standard tee is used, install a buffer or sleeve at the top of the opening. Adjust the tab length to the tubing size. For 1", 2" or 3" tubing, us the tab segments sup- plied. For example: for 2" tubing remove the 3" tab; for 1 ½” tubing, cut the tab to the tubing size or use the 1" tab.
L/min. flow values needed for switch operation
No part of the tab should touch the tubing or narrowing points of same. Screw flow switch on in a position in which the plane of the tab is in right angle to the flow. The arrow appearing on the side of the box should point in the flow direction.
Setting
This switch is
Flows
This table shows adjustable flows based on real test data, using 1", 2" and 3" vanes for
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| Adjustable flow (litres/minute) | |||
Tubing | Vane |
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| Min. | Max. | ||||
dia. | dia. |
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| Flow | Flow | Flow | Flow |
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| decrease | increase | decrease | increase |
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1" | 1 | 18 | (21) | 45 | (50) | |
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1 1/4" | 1 | 43 | (46) | 100 | (102) | |
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1 1/2" | 1 | 63 | (68) | 140 | (145) | |
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2" | 1 | 105 | (120) | 250 | (255) | |
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2 1/2" | 1 | 195 | (200) | 565 | (570) | |
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3" | 1 | 360 | (370) | 850 | (880) | |
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2" | 2 | 50 | (50) | 150 | (155) | |
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2 1/2" | 2 | 105 | (120) | 355 | (360) | |
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3" | 2 | 170 | (180) | 480 | (490) | |
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Note: Flow decrease: | Flow at which the switch is activated when flow | |||||
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Flow increase: | Flow at which the switch is activated when flow | |||||
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