thermital MODEX ACS 25 Manual

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The ACS 25 is an instant domestic hot water mixer. It uses a brazed, stainless steel plate heat exchanger and is ideal for

use in combination with DHW storage cylinders.

Temperature of the hot water delivered to the taps is regulated by the thermostatic mixing of water in the primary circuit.

The primary circuit pump is controlled by a flow switch in the DHW circuit, connected in series to the pump. The product

is equipped with two filling/drain cocks. When the shut-off valves are closed, these can also be used to flush out the heat

exchanger.

A domestic hot water recirculation kit is available for further convenience.

The ACS 25 instant hot water mixer comes complete with an insulated frame.

Description

1 DHW mixer in packing

2 Instruction manual

GENERAL SAFETY INFORMATION AND PRECAUTIONS

READ THIS MANUAL THOROUGHLY BEFORE PERFORMING ANY WORK ON THE PRODUCT.

The manufacturer reserves the right to modify the product without notice for the purpose of introducing technical im-

provements or to facilitate production, installation and positioning. The illustrations in this manual may therefore differ

slightly from the actual product. The safety of the product and the accuracy of the instructions provided are nevertheless

guaranteed.

This manual forms an integral part of the product itself and must be kept in a safe place in order to avoid damage and to

permit rapid consultation throughout the working life of the product.

Ideally, this manual should be kept with the product where it can be consulted whenever needed. The manual should

always accompany the product if sold or transferred to a new owner, or stay with it if the owner moves house and leaves

it behind, so that the next user can consult it.

THERMITAL MODEX ACS 25

DESCRIPTION

CONTENTS OF THE KIT

Qty.

cod. Doc-0072120 - Rev. 3 (04/2015)

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Summary of Contents for thermital MODEX ACS 25

Page 1 THERMITAL MODEX ACS 25 DESCRIPTION The ACS 25 is an instant domestic hot water mixer. It uses a brazed, stainless steel plate heat exchanger and is ideal for use in combination with DHW storage cylinders. Temperature of the hot water delivered to the taps is regulated by the thermostatic mixing of water in the primary circuit.
Page 2: Electrical Connections
GENERAL SAFETY INFORMATION INSTALLATION Disconnect the product from the mains power supply before performing any work on it. The product must be installed in conformity to the laws and standards applicable in the country of installation. The manufacturer’s responsibility is limited to the supply of the product. The product must be installed in conformity to applicable standards by suitably qualified persons employed by a company that assumes full responsibility for the com- pleted installation.
Page 3: Main Components
MAIN COMPONENTS 1 Pump 2 Ball valve, DN 20 1" M - 3/4” F 3 Red knob for primary circuit inlet valve 4 Blue knob for primary circuit return valve 5 Blue knob for cold water inlet valve 6 Black knob for non-return valve with DHW outlet temperature sensor 7 Non-return valve 8 Three-way mixer valve with thermostatic actuator, 35 - 65°C 9 Manual bleed valve, 3/8"...
Page 4: Water Circuit
WATER CIRCUIT 1 Shut-off valve 7 Non-return valve 2 Three-way mixer valve 8 Manual bleed valve 3 Modulating pump 9 Manual drain valve 4 Heat exchanger 10 Recirculation pump (accessory kit) 5 Flow switch 11 Temperature sensor 6 Valve with temperature sensor TECHNICAL SPECIFICATIONS DESCRIPTION ACS 25...
Page 5 Domestic hot water production graph Temperatura prelievo accumulo (°C) Temperature of water from storage cylinder (°C) NB: Correct functioning of the product is only guaranteed if the primary circuit inlet temperature is at least 5°C higher than the DHW setpoint. PUMP CURVES p/kPa p/kPa...
Page 6: Wiring Diagram
OVERALL DIMENSIONS AND FITTING POSITIONS ACS 25 MP - Primary inlet 1" M - 3/4" F RP - Primary outlet (return) 1" M - 3/4" F EAFS - Domestic cold water 1" M - 3/4" F inlet UACS - DHW outlet 1"...
Page 7: System Schematic
SYSTEM SCHEMATIC Example of wall mounted installation DHW outlet Recirculation Primary inlet Primary outlet (return) INSTALLATION PRELIMINARY CHECKS Carefully remove the packing and check that the product is complete and undamaged. If any defect or damage is de- tected, do not install or attempt to repair the product but return it to the retailer. Dispose of packaging in compliance with applicable law.
Page 8: Wall Mounting
The product must be stored in a dry place where it is not subject to frost. The product must be installed where it is protected against splashes of water. Ambient temperature in the place of installation must not exceed 40°C during functioning of the product.
Page 9 - Attach the product to the bracket (3) by inserting the screws (2) through the slots (4) in the back panel, using the side guides (5) to align it. - Slide the product down until the screws lie at the top of the slots.
Page 10 WATER CONNECTIONS CONNECTION TO THE WATER CIRCUIT 1 Safety valve 7 Expansion vessel (accessory) 2 Shut-off valve K Fitting for domestic cold water supply 3 Pressure gauge 4 Non-return valve 5 Pressure reducer valve (necessary for K>=6 bar) 6 Fine mesh filter The pipes between the product and the storage cylinder should be kept as short as possible.
Page 11: Putting Into Service
ELECTRICAL CONNECTIONS The following instructions are mandatory. 1 Use a multi-pole, magnetic thermal, earth leakage breaker and disconnector that conforms to legislation in the count- ry of installation. 2 Respect the L (Phase) - N (Neutral) polarity. Keep the ground wire about 2 cm longer than the power wires. 3 Make sure the product is correctly connected to ground.
Page 12: Flushing The Heat Exchanger
FLUSHING THE HEAT EXCHANGER - Shut off the DHW flow by closing the ball valves (1a) and (1b) for the cold water inlet and hot water outlet respectively. - Attach the flushing fluid supply to the cold water inlet valve (2a). - Attach the flushing fluid drain to the DHW outlet valve (2b).
Page 16 Via Mussa, 20 Z.I. - 35017 Piombino Dese (PD) - Italia Tel. 049.9323911 - Fax 049.9323972 - www.thermital.it - email: info@thermital.it As part of the company’s ongoing commitment to perfecting its range of products, the appearance, dimensions, technical data, equipment and accessories...