When equipment heat load changes during operation, the chilled water temperature may fluctuate. The system uses a water tank to buffer temperature changes. A larger water tank reduces temperature fluctuation but increases cooling time and occupies more space.
Selection needs to consider:
- Equipment heat load
- Allowed chilled water temperature fluctuation
- Initial water temperature
- Target water temperature
- Cooling time
If heat load fluctuates greatly, a larger water tank or a model with higher cooling capacity can be selected. Provide the heat load curve and allowed temperature range for technical calculation.
The system has a chilled water outlet and return water inlet. Connect them to the equipment water circuit. Before operation, check:
- Water circuit is filled
- No air in the piping
- No leakage at connections
- Water flow direction is correct
- Return water temperature is within the allowed range
If the equipment has an existing water circuit, confirm the connection size and flow demand. SCA series connection size is DN15 to DN40. If the existing piping size does not match, a reducer solution can be discussed at order confirmation.
The system includes high/low pressure, overload, anti-freeze, time delay, over-temperature, and water flow protection. These protections act when water flow stops, ambient temperature is too low, or voltage fluctuates.
Before starting the system, confirm:
- Power supply matches the nameplate
- Water circuit is filled and air is removed
- Ambient temperature is above the anti-freeze set point
- Ventilation around the unit is sufficient
If the water flow protection acts, check the water pump, water circuit valve, and piping blockage before restarting.
Standard Configuration (SCA Air-Cooled Series, Selected Models)
|
Parameter |
Unit |
SCA-01 |
SCA-03 |
SCA-06 |
SCA-10 |
|
Cooling capacity |
kW |
2.7 |
8.5 |
18 |
30 |
|
Power supply |
V/ph/Hz |
220/1/50 |
380/3/50 |
380/3/50 |
380/3/50 |
|
Input power |
kW |
1.34 |
3.19 |
6.13 |
10.54 |
|
Water pump power |
kW |
0.37 |
0.55 |
0.55 |
1.1 |
|
Water tank volume |
L |
20 |
50 |
80 |
200 |
|
Connection size |
DN |
15 |
25 |
25 |
40 |
|
Air flow |
m³/h |
1500 |
4000 |
7500 |
12000 |
|
Refrigerant |
- |
R22/R134a/R404 |
Same |
Same |
Same |
|
Noise |
dB(A) |
58 |
60 |
62 |
65 |
|
Unit weight |
kg |
75 |
150 |
200 |
260 |
|
Dimensions (L×W) |
mm |
600×520 |
1000×550 |
1250×650 |
1650×790 |
Complete parameters for SCA-02, SCA-04, SCA-05, and SCA-08 are available on other product pages or upon inquiry.
|
Symptom |
Check |
|
Water flow protection acts |
Water pump, valve, piping blockage |
|
Cooling capacity drops |
Condenser fin dust, ambient temperature, refrigerant charge |
|
Temperature fluctuation too large |
Water tank volume, heat load change, water flow |
|
Noise increases |
Fan blade, water pump, loose panel |
Daily maintenance:
- Clean condenser fins
- Check water circuit for leakage
- Check pump running current
- Confirm power supply voltage is stable
Q: What should be confirmed before connecting the unit to equipment?
A: Confirm equipment water inlet and outlet size, chilled water flow demand, allowed inlet water temperature, and return water temperature range. Also confirm the site power supply and available space around the unit. If the equipment has a plate heat exchanger or small channel, confirm the water quality and filter requirements.
Q: What causes large chilled water temperature fluctuation during operation?
A: Common causes include: water tank volume too small for the heat load, equipment heat load changes faster than the system response, insufficient chilled water flow, or air in the water circuit. Check the water circuit first, then confirm whether the selected model matches the actual heat load curve.
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