Smart Hot Water Company Smart Cylinder series User manual

Smart Cylinder User Guide
Version 1.0 –November 2016
Smart Cylinder
Users Guide

Smart Cylinder User Guide
Version 1.0 –November 2016 Page 2
Table of Contents
Introduction................................................................................................................................3
Home Screen.............................................................................................................................4
Set Time and Date.....................................................................................................................5
Set Hot Water Profile .................................................................................................................5
Savings Screen..........................................................................................................................9
Datalogging................................................................................................................................6
7 Day Data...............................................................................................................................10
System (or Tech) Screen.........................................................................................................10
Trouble Shooting......................................................................................................................11
For technical help contact your installer or maintenance technician.
Installer Details:

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Version 1.0 –November 2016 Page 3
INTRODUCTION
Congratulations on having a Smart Cylinder installed
in your home. Welcome to a new way of managing
your hot water heating
There are three parts to a Smart Cylinder
system
1. The Cylinder; where the water is heated
2. The Controller; that controls the heating,
measures the temperature and such
Usually located close to the hot water
cylinder
3. The Display;
your interface to the Smart Cylinder
The Display can be mounted away from
the cylinder
We recommend a hallway or similar as it
can be important to regularly see the
volume of hot water used and stored
The Colour Touch Display enables you to easily set the optimum efficiency for your
ever-changing hot water needs throughout the day, allowing you to create a tailor-made
balance between reserved hot water and power usage. Further it opens a window so
you can see and understand how your system is functioning and why.
The DisplaySmart Plus is user friendly with multiple information screens. We
recommend that you read of all the information screens, accessed via the icon
to gain familiarity with the product.

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HOME SCREEN
The Home screen is generally where most people would leave their display. It gives an
overview of the whole system. From here you can navigate to all the other available screens.
The indicates that everything is OK. If there is an error a will replace the green tick and
the text beside will inform the user on what the error is.
Element Status
Will be in one of the following five states;
Idle : The element is off
Topping Up : The controller has decided the tank needs heating to maintain the user
profile using an electric element (might be upper or lower in the case of a
dual element tank).
Sterilisation : The hot water in the cylinder needs precautionary sterilisation. The
element is heating to keep you safe. This is Senztek’s BioSafe©function
One off Boost : User has pressed the “one off boost” button on the display. The tank will
now heat to the Boost temperature using the electric element
Holiday : User has pressed the “holiday button. The element will not come on
except for sterilisation (typically once per week)
Hot Water Fuel Gauge
This is an estimation of useful hot water stored in your hot water cylinder. Make sure you
constituently keep looking at the gauge before and after your hot water use. This visual
feedback that will help you save hot water, even if you only glance at it. As unlikely as this
sounds this does make a difference for many people as to how much hot water they use*
Screen Brightness;
This will dim after 2 minutes of no activity and become bright again when the screen is touched.
This is to ensure the Display is not distracting within your home especially at night but is still
illuminated enough to be seen at a glance.
Note: On first power-up the waters safety is unknown so a BioSafe©cycle is initiated. Once
complete standard operation will resume. Once heated to 60°C this will last 1 hour at most.
Hot Water
Fuel Gauge
Navigation
Icons
Element
(heating) Status
System
OK

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SET TIME AND DATE
From the Home screen touch the Clock icon
Set the Time and Date by touching the field that you want to update until it starts
flashing and then using the Up/down arrow keys to adjust the value.
Press the Home icon when finished
Your new Date and Time will be displayed on the home screen.
The controller will maintain time keeping for 3 weeks with no power.
SET HOT WATER PROFILE
This is where you set the ‘roadmap’ for it to follow.
It is best to set this on the high side of what you might expect as the ‘savings’ control will
only reduce this profile, not increase.
There are 4 time bands each of which starts at the times in each column. E.g. the first
time is 0700 (7:00 am) so the first time band runs from 7:00am to 8:59am
The different expected levels of hot water needed in each time band will create a daily
profile. In the above example (yours may vary from this);
There will be an expected high use of hot water around 8:00a.m –9:00 am. To
allow for heating up time this is set to start at 7:00am
Then low usage until after 3:00pm. Then it is expected there will be a medium
requirement probably for dinner preparation and activity as people arrive home.
Late at night there is no tank heating at all until the morning.
Note: Min (blank), LOW and MED will tend to maintain hot water the upper ½ of the
cylinder while High (and MAX) will tend to maintain hot water in the entire cylinder.

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If you are not sure then set them all at HIGH (not MAX )
Setting;
A box will be flashing around the first time setting indicating that you can change
it using the up/down arrow keys.
Now set the hot water level in that band by touching the area directly above the
time box. Each time you touch the value will change from Blank through to MAX.
Note: This will be the maximum usage you are expecting. The Savings control
can only decrease this value.
Blank (Clear Bar): Very low hot water usage expected.
(Might partially heat if the entire tank is very cold)
LOW : Low hot water usage expected
MED : Moderate Hot Water usage expected
HIGH : High Hot Water usage expected
MAX : Element always heating to max (no change with Savings control)
To adjust the next time band touch on the time displayed for that band. The white
box will now move to that time and it can be adjusted as above. Repeat the
above steps for all four time bands.
The profile times must always start from earliest to latest left to right (as
demonstrated) If this is not the case the controller might incorrectly execute
heating times
This screen will probably rarely be altered once set up
There are many ways the profiles can be set up depending on what you are trying to
achieve (and why the Smart Cylinder is so powerful). Here are some suggestions;
1. Low Volume Hot Water Users
a. We are aiming to minimise lost heat from the walls of the cylinder in this
application (standing losses)
b. Set the profiles during the day to match you hot water use (not desired
savings but actual use!)
c. The example on the left is a common
profile for many families
d. Once your own profile is set start with
Savings at 0% for while (see savings
control in next section)
e. If you consistently have a hot water
fuel gauge reading surplus hot water
after your peak hot water times, then
start to increase the savings settings
until the fuel gauge readings stay low
and yet you don’t run out of hot
water.

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2. High Volume Hot Water Users
a. This is where lower priced power for water heating is of great value. It is not
uncommon for ½ price power to be available off-peak
b. This usually means using the POWER at an off-peak time and using the HOT
WATER at a more convenient time.
c. Traditionally ‘Night Rate’ power (power is only available to the hot water
element for a few hours late at night) has not been popular because if you
run out of hot water, there is no more until the next day. But with a Smart
Cylinder you can still save with Night Rate and yet have the luxury of a
system that will ensure you don’t run out of hot water. Night Rate requires a
dual element cylinder to work with a Smart Cylinder control.
d. A new and increasing popular alternative is called ‘Time of Use Tariff’ and
utilises a smart electricity meters ability to charge at different rates during
different times of the day, however, power is never removed, just charged at
different rates. Note: these are always at the same time/s of the day.
i. Set the profile for high use during the low cost tariff times. Do not use
MAX setting as this cannot be turned down by the Savings control.
This is important as it is still possible you might need much less than
a full cylinder of hot water
even it was heated at the
low tariff
ii. Set a medium to low setting
for higher cost tariff times
depending on you habits.
Remember the Savings
control can only turn the
profile value down, so a
slightly higher value can
easily be turned down with
the Savings control.
iii. Once your own profile is set start with Savings at 0% for while (see
savings control in next section)
iv. If you consistently have a hot water fuel gauge reading surplus hot
water after your peak hot water times, then start to increase the
savings settings until the fuel gauge readings stay low and yet you
don’t run out of hot water.
3. Solar Hot Water
a. Set profiles lower during daylight
hours to minimize electric boost
heating and give solar best chance
to heat the cylinder. At 5:00pm it
checks if there has been enough
solar gain until the next morning. If
not it intervenes to heat. Remember
these levels are maximums and
increasing the savings setting will
reduce them.

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4. Wetback Hot Water
a. Set profile lower during night hours
(or whenever it is most likely the fire
is burning) to minimize electric
boost heating and give the fire the
best chance of heating the cylinder.
b. It is assumed the fire will be heating
around 5:00 pm
5. Solar Electric (PV) installed, no diverter
a. Set profile high during daylight
hours to maximize PV electric
heating to give solar best chance to
heat the cylinder. At 5:00pm it
checks if there has been enough
solar gain until the next morning. If
not it intervenes to heat. Remember
these levels are maximums and
increasing the savings setting will
reduce them.
b. It might be worth changing 10:00 am slot from HIGH to MAX if the element
kWh is smaller than the Array kWh
6. Solar Electric installed, with diverter on
bottom element, Smart Control on top
element
a. Set profile low during daylight
hours to maximize PV electric
heating with the diverter to give
solar the best chance to heat the
cylinder. At 5:00pm it checks if
there has been enough solar gain
until the next morning. If not it
intervenes to heat. Remember
these levels are maximums and
increasing the savings setting will
reduce them.
b. Controller set to ‘Mid Element’
Note: Mid Element operation must be set by the installer (using installer settings
password) or at the factory.

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SAVINGS SCREEN
If your preset Hot Water Profile ‘roadmap’ matches your actual hot water usage profile,
then you might not even need to adjust the savings control at all from 0%
By observing your hot water fuel gauge especially before and just after high usage times
like morning showers, then you should be able to see if you have too much or too little
reserved hot water. A useful tool to assist with this is the 7 Day Data screen that shows
minimum and maximum stored hot water over the last 7 days (see next page).
To reserve less hot water, increase the Savings control by pressing the
To reserve more hot water, decrease the Savings control by pressing the
You will see the Hot Water Profile bars change in height as you change the
Savings setting. This indicates how your profile is being changed.
Initially it might be best to set the savings at 0%. If you find you regularly have spare hot
water as indicated on the home screen ‘fuel gauge’ then try increasing the Savings
control in say 10% increments until you find the best setting to suit you. This might take
days to establish the best setting.
This way you should find a balance between reserved hot water and hot water needs.
Note: Only after being sure you cannot adjust the savings setting to suit your hot water
needs should you consider adjusting the (preset) profile. A profile change is a big step
Note: We use the % for the savings control as a useful scale; it is not necessarily tied to
the hot water fuel gauge %
Touch to take you into the special element functions.
Boost: This is a one off heat up of the tank to maximum. It will reset once
at the target temperature. Typically 65°C. Might be used for a
special occasion such as visitors coming.
Holiday: Turns off the element/s until pressed again to reset.
Note: BioSafe Legionella protection will override this and keep
the tank safe (usually once a week at most)

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7DAY DATA
You can step through the last week’s recorded data for the various parameters.
To step between screens use
SYSTEM
This screen is a more detailed diagnostic display.
1. Set a Home Owner Password (optional) 
If you do not want anyone except authorised individuals to change your hot water
settings you can set up a password protection by following these instructions:
From the Home screen use the “Diagnostics” Icon followed by the “Lock” icon as
pictured above
Press the “Set User Password” button
Enter a four digit code for your password
You can disable the password from here on by pressing the “Clear User Password” that
will now be visible instead of the “Set User Password” button.
If you forget your password you can clear the password with this Master Clear Password
that will always work “5106”.
Note: The icon is for the system setup and qualified personnel only. It is code protected.

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TROUBLE SHOOTING
Ripple Control (load shedding by power utility).
Symptom: No display, no lights on the controller
Possible reason: If the controller uses the same power as the hot water cylinder element
then it is possible the power has been removed by ripple control.
Only when power is restored can the Smart Controller and display start working again.
Ripple control in New Zealand is usually mainly used in winter and for only a few hours at most.
However in times of power shortage this might be longer and /or more frequent
If your ripple control has removed power for an extended time, especially for 12 hours or even
24 hours then it is possible the ripple has failed to re-energize (a known issue). Contact your
power provider to enquire if ripple control is still active.
Note: It is possible to have the Smart Controller wired so the controller uses non-interruptible
power (so you can still see and use the display) while the hot water element separately uses
ripple controlled power. Talk to your Smart Controller representative if you would like this option
installed.
Another option is to have the ripple control removed; however this might increase your power
costs. Your power utility will be able to help with information on this option.
Symptoms
Possible Causes
Actions
No Display and No lights
on Controller
No power to controller
Faulty controller
(rare event)
Check if circuit breakers tripped
Check with power utility if load
shedding (ripple control is active)
Check if hot water power has been
switched off at the wall. Or changeover
range/hot water switch has not been
returned to ‘hot water’
No Display But lights on
Controller
Cable to Display from
controller cut (white
cable)
Faulty Display
Call authorised service agent for repair
‘Sterilising’ stays on
main screen for more
than a few hours.
Unable to heat entire
cylinder to 60°C
Check if there is a hot water leak
somewhere.
Call authorised service agent for repair
Water frequently cold
Ripple control
interrupting power
Savings control too
high or wrong profile
Use manual boosting in the short term
if ripple events seasonal.
Adjust savings control down
Adjust profile as a last resort
Only qualified persons should directly check mains wiring, voltages or currents.
If replacing a wired fuse (as distinct from a circuit breaker) beware this could explode
on insertion with a live circuit if there is a short circuit. Make sure the power to the
hot water cylinder is turned off at the switch leading to hot water cylinder and the
power is switched off at the switch board before insertion. Use safety glasses. It is
best to call an electrician to be safe