Power Requirements; Operating Instructions; Flow Requirements; Water Quality - Elecro Engineering Nano SPA Heater Installation & Operating Manual

2.5 Power requirements

– 240V 1-Phase Power Output
220
400V 3-Phase Phase Power Output

3. OPERATING INSTRUCTIONS

3.1 Flow requirements

The flow rate of water into the heater must not exceed 17,000 litres per hour (17m
per hour). A higher flow rate will require the installation of a by-pass to prevent damage to the heater
elements.
NOTE: The heater will not operate unless the following minimum flow rates are achieved:

3.2 Water quality

The water quality MUST be within the following limits:
•
PH: 6.8 – 8.0
•
Total Alkalinity (TA): 80 – 140 ppm (parts per million)
•
Chloride Content MAX: 150 mg/litre
•
Free Chlorine: 2.0 mg/litre
•
Total Bromine: Max 4.5 mg/litre
•
Total Dissolved Solids (TDS)/Calcium hardness: 200 – 1,000 ppm
The permitted salt concentration is dependent on the model of heater purchased:
•
Incoloy 825 heating element = Zero salt content permitted
•
Titanium heating element = MAX salt content of 8,000ppm (8g/litre)
•
For salt concentrations greater than 8,000ppm a Titanium flow tube and Titanium heating element
model must be installed.
Upon completion of the installation, run the water-circulating pump to purge the system and heater of air
(i.e. remove any trapped air in the system and heater).
•
Switch on the power supply to the heater. This will be indicated by the illuminated Amber light on
the panel.
•
Turn the thermostat to the desired temperature.
•
The heater will only start heating (red light indicator illuminated) when the following criteria are met:
➢ Water circulating pump is 'On' delivering more than the minimum flow rate of water (see 3.1
flow requirements).
➢ The required water temperature point is set to a higher value than that of the water.
1-kW
2-kW
3-kW
4-kW
4.5-kW
5-kW
6-kW
8-kW
1,000 litres/hour (1m
3
/hour / 220 UK gallons/hour).
Load
5-Amp
9-Amp
13-Amp
18-Amp
20-Amp
22-Amp
27-Amp
Load
20-Amp
3
/hour/3,740 UK gallons
7