Pipe Installation; Electrical Installation - Pahlen MidiHeat EHA User Manual

MidiHeat EHA
Installation
Pipe routing shall always performed before the electrical installation.
Position the heater so that the front and top can be opened. Install the connections so that the heater can be easily moved for
inspection, cleaning and service.
A non-return valve must be installed AFTER the heater and a shut-off valve BEFORE the heater to allow servicing the heater
without needing to empty the pool.
A by-pass should be installed and adjusted so that the recommended flow through the heater can be attained.
Mount the heater on the floor/foundation with screws/bolts through the four Ø9 mm holes in the bottom.

Pipe installation

Connect the heater to the pool system according to the flow diagram below. The outlet must not be connected to any other type
of tap or connection than those given.
The electric heater has a G2¾" connection for glued attachment of Ø63 mm outer diameter PVC piping.
NOTE! Do not fit a shut-off valve between the heater and swimming pool (fit a non-return valve instead).
Mixing of chlorine, acid or similar in the pool water must always be performed AFTER the heater, to avoid corrosion.
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Electrical installation

• The electrical installation must be performed by an authorized electrician and in accordance with the instructions included
with the heater.
• A main switch must be fitted before all of the heater's electrical connections (L1, L2 L3). This must be a multi-pole switch
that fulfils the demands of IEC/EN 60335-1 sections 7.12.2, 22.2, 24.3.
• We recommend the installation of a residual current device.
• Connect the heater in accordance with the connection drawing, see pages 13 and 14.
• The control voltage is connected to connection block L1 and N from a single phase 230V supply or to L1 and L2 from a
3-phase 230V supply with no N (neutral).
Note that the control voltage must be equipped with separate 5–10 A fuses for the electrical connections (L1, L2).
• The heater must be installed in such a way that it cannot be activated unless circulation pump (sufficient flow) is operational,
i.e. the control voltage to the heater's contactor must be interlocked via the pump's contactor.
• Do not connect the heater to an incorrect power source. Contact the local electrical utility for the correct power source.
The voltage to the heater may not vary by more than +5% to -10% with respect to the model and name plate specification.
• On delivery, the heater is connected for 400V 3-phase, see figure 4 + electrical drawing page 13, but can be reconnected for
230V 3-phase, see figure 5 + electrical drawing page 14 (applies to all variants except 72kW).
• The input cabling for the control circuit must always be fused for 5–10A.
• The input cabling for the contactors shall be fused in accordance with the table for the operating voltage in question,
see figure 4 or 5.
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ENGLISH
1. Skimmer
2. Main drain
3. Inlet
4. JetSwim
5. Light
6. Circulation pump
7. Filter
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8. MidiHeat
9. Non-return valve
10. Drain
11. Bypass valve
12. Shut-off valve
13. Draining valve
Figure 2