SINGLE SCREW CHILLERS IMM
Engineered for Flexibility and Performance
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4. Inlet/outlet of the water pipe should be equipped with pressure gauge to calculate the pump
running status according to the characteristics of the pump.
5. Qualified water flow detecting devices must be installed on each chiller water pipe, such as
water flow switch or differential pressure switch interlocked to the chiller controller.
6. The chiller would control the cooling water pump, chilled water pump and cooling tower fan
on and off, so as to achieve best efficiency of energy saving and reliability.
Caution: Chiller flow detecting device shall be interlocked with pumps. When the flow
metering device detects the flow rate is insufficient or no flow, chiller won’t start but trip. If
the flow detecting device is not connected with chiller controller, the protection will not be
active and client must ensure the pump start and flow is established before chiller start.
Otherwise Daikin won’t be responsible for any loss caused by this.
C) Eliminate the impurities in water loop
1. Strainer and drain pipe shall be installed in water loop.
Sand\muck\rust in water loop will corrupt metals such as chiller tubes.
2. The strainer shall be installed near and in the inlet pipe of chiller
Please use 40 mesh filters.
3. Check the filter and drain port periodically.
Consider its service space during installation.
4. In order to easily clean chiller tubes, isolation valves are requested for both inlet and outlet
chiller pipes. To easily remove the water box, please use flexible pipe connection in both
chiller inlet and outlet pipes.
5. Install ventilation valve and draining valve in water loop for water system inspection or
cleaning use. Connect the draining valve and gutter.
D) Prevent air mix in water loop
1. Install ventilation valves to ventilate the air in the system.
Air in water system will reduce chiller efficiency and shorten service life of tubes.
2. Be careful on the water flow rate, too high flow rate will cause tube cavitation, etc.
3. Too much oxygen in water will increase water causticity.
E) Follow the chiller operation guide
1. Please ensure chiller operates within the maximum working pressure.
2. Please execute according to the recommended temperature range of the chiller condenser
stated in [chiller parameters part].
If the temperature does not fall in this range, the performance and the service life of the
chiller will be affected.
F) Pipe and tube internal anti-corruption treatment
1. It is forbidden to install grounding cable on water pipe to prevent electrical erosion.
2. Anti-corruption treatment shall be taken for buried pipes.
3. Prevent condenser and evaporator from water and air interface.
Refer to recommended water quality [Chapter 11.3 Chiller water quality requirement].
4. Add corrosion inhibitor to chilled water (Glycol, CaCl
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