Watermark STM1 User manual

Sparkling, Chilled and Ambient
Water Dispenser
STM1 Installation and Operating Manual
with ST1 and ST2 Tap Options.
Please read these instructions
carefully before i
nstallation.
CopyrightSodatap©2023Page1STM1ManualV10
Thisapplianceincorporatesbackflowprotection
complyingwithAS/NZS3500.1
Nofurtherbackflowprotectionisrequiredforconnection
tothewatersupply.

Table of Contents
Customer Service ............................................................................................................................ 3
Product Specifications .................................................................................................................... 4
Product Dimensions........................................................................................................................ 5
Parts Overview................................................................................................................................ 7
Before Installation........................................................................................................................... 9
Installation Instructions ................................................................................................................ 10
ST1 Tap –Introduction.............................................................................................................. 11
Plumbing Installation –ST1 Tap................................................................................................ 12
ST2 Tap Introduction................................................................................................................. 16
Plumbing Installation - ST2 Tap ................................................................................................ 20
Procedure for CO2cylinder installation .................................................................................... 24
Commissioning of Cold/Ambient Water................................................................................... 25
Commissioning of Soda/Sparkling Water ................................................................................. 26
How to use the tube connection fittings ...................................................................................... 27
Safety Considerations ................................................................................................................... 28
Leakage Detection ........................................................................................................................ 30
Maintenance................................................................................................................................. 31
Filter replacement..................................................................................................................... 31
Gas Replacement –As Required............................................................................................... 34
Troubleshooting............................................................................................................................ 35
Warranty....................................................................................................................................... 36
List of Figures ................................................................................................................................37
ProductInstallationRecord............................................................................................................3
ListofTables.................................................................................................................................37
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Customer Service
© Water Dispenser. The STM1 is
a high performance unit manufactured using quality materials and components.
reliable and trouble-free service.
More information about Sodatap, contact details and access to spare parts can be
found at sodatap.com.au.
Product Installation Record
We suggest completing the following and keeping this page in a safe place for
future reference:
Model Number STM1
Serial / Batch Number
(refer to label on the rear of the unit)
Distributor purchased from
Date of Installation
Installer / Technician Details
Table 1: Product Installation Record
We recommend professional installation by a licensed plumber, who will also
have access to any special tools required to carry out the installation. Faulty
operation due to work by unqualified persons will result in a voided warranty.
Please check laws applicable to your State regarding installation. This product
must be installed in accordance with AS/NZS3500.1 and AS/NZS3500.2.
Onceinstalledcorrectly,andifitismaintainedproperly,itwillgiveyearsof
CongratulationsonyourpurchaseoftheSodatap
CopyrightSodatap©2023Page3STM1ManualV10

Product Specifications
Model Number STM1
Flow Capacity 20 Lph
Max Power Consumption 100 W
Max Water Pressure 500 Kpa
Recommended Water Pressure 350 Kpa
Room Temperature Operating Range 10°C to 40°C
Chilled Temperature 4°C to 10°C
Power Requirements 50 Hz / 220-240 V
Unit Dimensions 435 (H) x 230 (W) x 370 (D) mm
Warranty 2 Years
Table 2: Product Specifications
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Product Dimensions
Figure 1: Dimensions STM1 Unit
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Figure 2: Dimensions ST1 Tap
Figure 3: Dimensions ST2 Tap
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*
*note-somemodelsmaybe20mmtaller

Parts Overview
have been damaged in transport.
Your purchase should include the following parts:
2
Figure 4: Parts Included
Afterunpackingtheequipment,ensureallpartsarepresentandcheckthatnone
PartsexcludeaCO bottle*.Providedthesuppliedpressureregulatorisinstalled,
2CO
CO
TheST2tapisanoptionalsubstitutefortheST1tap.
mostCO bottlescanbeused,includingaregularSodaStreambottlehowever,
most
forbettervalueandeaseofuse,werecommendusinga2.6kgbottleavailablefrom
sodatap.com.auoryourlocalbrewingsupplystore(wheretheycanalsoberefilled).
ThetubingincludedcanbeusedforbothCO2andwaterconnections.Itcanbecut
toanylengthandtheamountsuppliedisampleforregularinstallation. 
CopyrightSodatap©2023Page7STM1ManualV10
seenotebelow^
^ThisapplianceincorporatesbackflowprotectioncomplyingwithAS/NZS3500.1Nofurtherbackflowprotectionrequiredfor
connectiontothewatersupply.
^
*unlessselectedwithyourorder
^a0.9kgbottleisalsoavailableifspaceisrestricted

The following table lists the parts. Item numbers are referenced in some of the
diagrams that follow.
ITEM
NUMBER
PART DESCRIPTION QUAN
TITY
1 ST1 tap 3-Function touch screen tap for chilled
filtered, chilled filtered sparkling and
ambient filtered water.
With wiring loom.
1
1
ST2 tap (when
substituted for
ST1 tap)
5-Function tap for chilled filtered, chilled
filtered sparkling and ambient filtered
water. Connection to existing unfiltered
hot and cold water via braided flexible
hoses.
With wiring loom.
Hot water flexible hose.
Cold water flexible hose.
1
1
1
1
2 ¼ inch push-in
connector
Connects water outlet tube to outlet tap 1
3 ¼ inch LLDPE tube For all water and CO2 connections 3 M
4 3-way valve For connection to water outlet 1
5 350 Kpa pressure
limiting valve
Reduces inlet water pressure when 1
6 STM1 unit Main chiller/filter & carbonation unit 1
7 Pressure regulator
valve
To set and adjust CO2output pressure 1
8 240 V power
supply cable
Connects unit to standard AU 10 A
power outlet
1
9 BC filter 1
1
Table 3: Parts List
10 NSCfilter Nanosilvercarbonultrafinewaterfilter
CopyrightSodatap©2023Page8STM1ManualV10
Blockcarbonwaterfilter
required*(seenotebelowtable)
*ThisapplianceincorporatesbackflowprotectioncomplyingwithAS/NZS3500.1
Nofurtherbackflowprotectionrequiredforconnectiontothewatersupply

Before Installation
VERY IMPORTANT! Carefully read through this instruction manual and check that
all environmental requirements can be met to prevent voiding the warranty.
The installation sequence must be followed in the correct order and as specified
in this user manual. The unit and CO2 bottle must be installed upright as shown in
the diagrams in this manual. In the event of a leak or electrical fault, the unit must
be isolated from both power and water supplies and advice should be sought
from a qualified technician.
Note: To comply with Australian Plumbing Standards, the supplied pressure
limiting valve must be installed. This will prevent damage or malfunction in case
• Caution: The STM1 system is designed for mains/town water supply onlyand
this supply must be microbiologically safe and disinfected if appropriate.
• Check the appliance rating (see specifications for power requirements), and
ensure the correct power supply is available for the appliance and that the
relevant circuit will not be overloaded.
• Check that the unit and tap locations are within reach of each other and within
reach of the power and water connections.
• There must be sufficient room for the appliance inclusive of ventilation
requirements for other appliances within the cupboard and in general. Ensure
that the cupboard is capable of supporting the appliance. Provide for 24 kg, which
includes a gas bottle.
Note: If required, provide additional ventilation within the cupboard before
starting the installation. The aim is to avoid cupboard temperatures reaching 40°C
or above. Inadequate ventilation can lead to malfunction and may as a
consequence void the warranty.
Installation Note: Although failure can happen early due to unforeseen
circumstances, a water filter system like any product, has a limited life and may
eventually fail. To avoid possible property damage, this product should be
regularly examined for leakage and/or deterioration and replaced or serviced
thelinepressureexceeds350kPa,whichistherecommendedlimitfortheSTM1unit.
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when necessary. A drain pan, connected to an appropriate drain or fitted with a
leak detector, should be used in applications where water leakage could cause
property damage. The water and gas supply should be turned off if no one is
home for an extended period of time.
Figure 5: STM1 Unit at a Glance
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Installation Instructions
ST1 Tap –Introduction
The ST1 tap does not replace an existing tap, but augments it with functionality
for dispensing filtered chilled, filtered ambient and filtered chilled sparkling water.
ST1 Tap Operation
Certain ST1 tap models may have a “sleep” mode. This mode is indicated by the
blue LED light (Figure 6: Touch panel buttons and colours - ST1 tap). Press the
desired button once and the LED light will change from blue to green to indicate
that the tap is ready. Press the button again to start dispensing water.
Figure 6: Touch panel buttons and colours - ST1 tap
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Plumbing Installation –ST1 Tap
The following instructions refer to the diagrams in Figure 7: STM1 Unit Plumbing
and Figure 8: Complete STM1 Installation (ST1 tap and parts as listed).
1. A 26 mm hole is required for the ST1 tap (max. 30 mm). Select a suitable
position for the tap on the counter top so that it will dispense into the sink
bowl with ample clearance below the outlet.
2. Isolate the existing water supply. Uninstall the connections on the existing cold
water line and connect the 3-way valve. Reinstall the previous connection to
the 3-way valve.
3. Connect the inlet of the pressure limiting valve to the outlet of the 3-way valve
using a suitable length of the supplied tubing. Observe the water flow
direction as illustrated in Figure 8: Complete STM1 Installation (ST1 tap and
parts as listed).
4. Connect the straight connector to the tube on the tap.
5. Connect the wiring loom to the tap after removing the black plastic nut from
the tap thread. Be sure not to bend or break the pins.
6. Carefully feed the wiring loom, straight adaptor and tap connections through
the tap hole and place the tap in position, ensuring it sits flush with the
counter top.
7. Screw on the tap nut and tighten, making sure the tap is correctly positioned
on the counter top. Installing the tap on a sink instead of a counter top may
require more care to align all the parts. HAND TIGHTEN ONLY - overtightening
may split the plastic nut.
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Water Inlet
¼” PE Inlet
Water Pipe
Tap Wire
Connector
Water Outlet 350 Kpa Pressure
Limiting Valve
Figure 7: STM1 Unit Plumbing
0 = off
1 = on
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8. During and after plumbing installation, ensure that all switches at the rear
panel of the unit remain off.
9. Choose the best position for the unit with the required 150 mm clearance for
ventilation at the rear and at the top of the unit. Allow access room for
changing filters at the top of the unit and a suitable place where water spillage
will not cause damage to property.
Note: If the cupboard does not permit enough space for filter changes, leave
enough tube length to allow the filter system to be removed from the
cupboard to change the filters.
10. With a suitable length of tubing, connect the outlet of the pressure limiting
valve to the water inlet at the back of the unit.
11. With a suitable length of tubing, connect the straight adaptor to the water
outlet, trimming back any excess tubing.
12. Attach the wiring loom from the tap to the unit, taking care not to bend or
break the pins.
13. Connect the power cord at the rear of the unit to the power outlet.
Note: DO NOT turn on the water or power supply, this will be done in the
Cold/Ambient Water Commissioning steps.
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The following diagram illustrates the complete installation of the STM1 unit,
showing the ST1 tap and other parts as in Table 3: Parts List
Figure 8: Complete STM1 Installation (ST1 tap and parts as listed)
CopyrightSodatap©2023Page15STM1ManualV10
Are you a Plumber? Contact us to find out how we can help grow your business! [email protected]
(seenotebelow^)
^ThisapplianceincorporatesbackflowprotectioncomplyingwithAS/NZS3500.1
Nofurtherbackflowprotectionrequiredforconnectiontothewatersupply

ST2 Tap Introduction
The ST2 is an optional substitute for the ST1 tap. The ST2 tap replaces an existing
tap and provides functionality for dispensing regular hot and cold tap water
(right-hand lever), and filtered chilled, filtered ambient and filtered chilled
sparkling water (left-hand controller).
Figure 9: ST2 Tap Parts Overview
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Note‐Ifnocolouredstripes
changeable.
arepresent,theyareinter‐

ST2 Tap Operation –Right-hand side
Figure 10: ST2 Right-hand Tap Instructions
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ST2 Tap Operation –Left-hand side
Figure 11: ST2 Left-hand Tap –Stop Dispensing Positions
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The ST2 left-hand tap operates by turning the controller from the stop positions
to the desired dispensing mode. The controller has 5 positions (refer Figure 11:
ST2 Left-hand Tap –Stop Dispensing Positions. The next two diagrams illustrate
controller positions for the Chilled and Sparkling Water dispensing modes.
Figure 12: ST2 Left-hand Tap Dispensing Modes
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Plumbing Installation - ST2 Tap
1. A hole with a diameter between 32 mm and 35 mm is required for the ST2 tap.
Select a suitable position on the counter top that is more than 50 mm away
from the wall, and for the tap to dispense into the sink bowl with ample
clearance below the outlet.
2. Referring to the diagram below, insert hot and ambient inlet water pipes into
the corresponding holes, then twist the pipes to fix them into the tap body.
Figure 13: ST2 Tap Plumbing (view 1)
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