7
2.5 Power requirements
220
– 240V 1-Phase Power Output
Load
1-kW
5-Amp
2-kW
9-Amp
3-kW
13-Amp
4-kW
18-Amp
4.5-kW
20-Amp
5-kW
22-Amp
6-kW
27-Amp
400V 3-Phase Phase Power Output
Load
8-kW
20-Amp
3. OPERATING INSTRUCTIONS
3.1 Flow requirements
The flow rate of water into the heater must not exceed 17,000 litres per hour (17m
3
/hour/3,740 UK gallons
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:
1,000 litres/hour (1m
3
/hour / 220 UK gallons/hour).
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
mus
t 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.
