2 x1.5” Female/Threaded Socket Unions Required

PLUMBING

Alto heat pumps are supplied with 1.5" BSP parallel threads, male. We strongly recommend a 1.5" female socket union is applied to inlet/outlets for future draining and servicing of the appliance.

Alto heat pumps must be installed in the return line after the filter. If an existing heater or back-up heater has been installed then the heat pump should be installed between the filter and the other heater. If solar

heating has been installed, the heat pump should be installed after the solar heating system. See Drw.2 page7.

If the heat pump is to be installed at a lower level than the pool then isolation valves or non-return valves should be installed.

Do not route any plumbing lines across heater inlet panels. All plumbing should be adequately supported.

Once all plumbing connections have been completed the filtration should be turned on and the systems tested for leaks. A refrigerant/flow meter is located next to the control panel. Alto heat pumps will generally take the full flow of the filtration pump. In some instances if there is too much flow (see page 12 re refrigerant/ flow meter) a by-pass may be required. If there is insufficient flow an auxiliary booster pump may be required. Please contact your dealer for advice.

Important - (applicable for stainless steel/copper heat exchangers) Standard unit. If your pool has an automatic chemical dosing appliance the heat pump should be installed prior to the dosing system. See applicable drawings (1-4) on pages 7-8.

FLOW SWITCH (Optional)

Alto heat pumps have the option of installing a flow switch. A flow switch will deactivate the heater if there is a loss of water flow i.e. in the event that the circulation pump deprimes (no flow) the heater

will switch off.

We recommend that the heat pump should be interlock wired with the

circulation pump i.e. heat pump only functions when pool circulation pump isOFF ON running. A flow switch (provided) can also be installed as an extra precaution in

the event that there is a loss of water flow (i.e. circulation pump deprimes).

It is our recommendation that the flow switch is installed for added protection on a pool installation that is below ground. If the heater is to be installed on an above ground pool, the circulation pump is normally under flooded suction therefore, heater and filtration pump could be wired together.

In the event that there is no flow ‘E3’ will be displayed on the control panel and heater will stop functioning.

ELECTRICIAN NOTE - PLEASE CHECK CONTINUITY OF FLOW SWITCH BEFORE INSTALLING. PLEASE ALSO SEE PAGE 15 - FILTRATION & FAQ

1 X FLOW SWITCH

1 X CRIMP -ON CONNECTIONS

1 X 1.5”- 0.75” PLN RED. BUSH

1 X 0.75” PLAIN - 0.5” FEMALE THR. RED. BUSH

5

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Sigma AS-H50Y, AS-H60Y, AS-H40Y installation manual Plumbing, Flow Switch Optional
Page 5 Page 7

AS-H40Y, AS-H60Y, AS-H50Y specifications

The Sigma AS-H50Y, AS-H40Y, and AS-H60Y are high-performance amplifiers designed for audio professionals and enthusiasts who demand exceptional sound quality and reliability. Each model brings unique features and technologies to the table, catering to a variety of audio applications ranging from live sound reinforcement to studio monitoring.

The AS-H50Y is a compact yet powerful amplifier that delivers a robust 250 watts of continuous power per channel, making it ideal for smaller venues or portable sound systems. Its lightweight design enhances portability, while advanced thermal management ensures optimal performance even during extended use. The AS-H50Y incorporates a Class D amplifier architecture, providing high efficiency and low distortion. Its built-in limiters protect both the amplifier and connected speakers from damage, guaranteeing a long lifespan and reliable operation.

Moving to the AS-H40Y, this model is engineered for incredible versatility, offering an impressive power rating of 400 watts per channel. One of its standout features is the integrated digital signal processing (DSP), which allows users to fine-tune audio output to their specific needs. The DSP functionality includes multi-band EQ, time alignment, and various presets tailored for different environments. Additionally, the AS-H40Y boasts multiple input and output options, making it compatible with a wide range of audio sources, from microphones to instruments.

The AS-H60Y takes things up a notch with an outstanding 600 watts per channel output, making it suitable for larger venues and professional applications. This amplifier also incorporates advanced networking capabilities, allowing for remote control and monitoring via a dedicated app. This feature enables users to adjust settings on the fly, ensuring optimal sound quality during performances. The AS-H60Y uses advanced heat dissipation technology, ensuring that the unit remains cool and operates efficiently even under high load conditions.

All three models share critical characteristics, including rugged construction designed for reliability, high-quality components for superior audio fidelity, and flexible connectivity options. With their respective power outputs and features, the Sigma AS-H50Y, AS-H40Y, and AS-H60Y cater to a wide range of audio needs, making them excellent choices for those seeking outstanding performance in various settings. Whether for live sound, installations, or studio work, these amplifiers provide the power and flexibility essential for modern audio challenges.
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