HOT WATER HEAT PUMPS Econergy THD3500 User manual

THD3500 HEAT PUMP WATER
HEATER
USER MANUAL
25072022

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IMPORTANT:
Warranty registration installation declaration form enclosed
separately for installer to complete and return. A copy of this
information is to be completed by installer on the back of this
manual.
Please read and retain this manual in a safe place.
Service phone: 0800 ECONERGY (0800 32 66 27)
Service agents: www.econergy.co.nz
Econergy® THD3500

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CONTENTS
Important Information _____________________________________ 4
About your Econergy Heat Pump ______________________ 4
Installing your Econergy Heat Pump ____________________ 5
Heat Pump Operation ____________________________________ 6
Normal Operation ___________________________________ 6
Solar Mode ________________________________________ 7
Maintenance____________________________________________ 8
Troubleshooting _________________________________________ 9
Heat Pump Specifications ________________________________ 12
Warranty Information ____________________________________ 14
Warranty Registration Installation Declaration _________________ 15
Econergy® THD3500

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IMPORTANT INFORMATION
•This product has a classification of 6.101 for appliances not accessible to the
general public.
•The appliance is not intended for use by young children or infirm persons
without supervision.
•Young children shall be supervised to ensure they do not play with the
appliance.
•If the supply cord is damaged, it must be replaced by the manufacturer or its
service agent.
•The fuse on the electronic controller is 6A/250V. This should only be replaced
by a qualified electrical service technician or electrician.
•Warranty and Support – All Econergy Water Heaters are backed by our
Auckland factory with a 3 year warranty. Warranty does not apply in areas
with corrosive or hard water unless water softener fitted .
About your new Econergy® Heat Pump Water Heater
Congratulations on purchasing an Econergy® THD 3500 heat pump water heater.
Designed to our specifications, the THD3500 heat pump water heaters are a lower
cost version of the Econergy HP4LT .
Econergy® heat pump water heater’s slash your water heating bill by transferring free
renewable energy in the air to heat your hot water. Not only will this save you money
while giving you a reliable supply of hot water - by reducing power consumption you’ll
also be doing your bit for our environment. The Econergy® heat pump water heater
uses electricity to drive a heat pump cycle, which takes the energy in the surrounding
air and transfers it into the water. The process is quite similar to how a refrigerator or
air conditioning unit operates, except the technology has been optimised to produce
a steady supply of reliable hot water at minimum cost.
Econergy® THD3500

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While installation of an Econergy® unit is a straightforward plumbing and electrical
job, installation of your Econergy® heat pump water heater is best carried out by
Econergy - trained trade certified plumbers and registered electricians in accordance
with detailed installation instructions supplied from the factory. This ensures that you
will get the best possible performance from your heat pump water heater, irrespective
of whether the unit is installed in a new or existing dwelling. It also means you will
enjoy the protection of a factory-backed three year parts and labour warranty . (Refer
to page 11 for terms and conditions).
In existing homes, Econergy® heat pump water heaters can be conveniently
retrofitted to your existing electric hot water cylinder where the cylinder is post-1988
and in good condition.
For best performance, the Econergy® heat pump water heater can be connected to
an Econergy® duplex stainless steel heat pump ready hot water cylinder. This will
ensure the last few % savings are achieved and ensure the longest service life of the
total system.
Installing your Econergy® Heat Pump Water Heater
Econergy® THD3500

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HEAT PUMP OPERATION
Under normal operation the main power switch (usually a white 20 amp rocker switch
located next to the hot water cylinder), and the outdoor switch next to the heat pump
unit must be turned on. The two ball valves on the hot water cylinder (on the lines
going to and from the heat pump) must be open to allow water to circulate to and
from the heat pump water heater.
•If power is on to the hot water circuit, the power light on the Status Indicator
(shown on page 6) will be glowing green. (NB: if the power light is not glowing,
the power to the hot water circuit may have been turned off by the power
supply authority, this can happen up to 7 hours per day and is perfectly
normal)
•The status light will be off when the HPWH is not running.
Normal Operation
Your heat pump water heater is supplied with a status indicator and electric backup
unit as shown in the diagram below.
This small grey box is located adjacent to the hot water cylinder. It informs the user of
the status of the heat pump unit and allows the element to be manually switched on if
required for any reason.
Operating your Econergy® Heat Pump Water Heater
Econergy® THD3500
Indicates if backup
element has been
switched on
Indicates Econergy®
unit is in Solar mode
Indicates if the Econ-
ergy® unit is off, run-
ning or has a fault
Allows user
to manually
turn element
on if required:
Position 1:
Power is on
to heat pump,
Position 2:
to backup
element
Indicates that power
is on to Econergy®
HPWH

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•When the water temperature in the bottom of the tank gets below the pre- set
cut-in temperature, by natural heat loss or from running off hot water, the heat
pump will start running.
•The status light will glow solid red while the heat pump is running
•When the whole hot water cylinder is heated and hot water is being drawn
back to the heat pump unit, the heat pump unit and the status light will switch
off until heating is required again
•If the ambient temperature drops below -3°C for a period of time then the hot
water element and backup light will glow red. The hot water element and
backup light will turn off once the ambient temperature rises above -3°C.
Solar mode is a time-clock software update that can be installed during production to
optimise the operating time for photovoltaic (PV) solar power systems. The heat
pump will use its lower tank sensor for regular operation during specified daylight
hours to do a full cylinder reheat. Outside of the timed hours the upper tank sensor is
used (solar mode only works with two sensor systems). When the available hot water
at the top of the cylinder gets low the heat pump will switch on for one hour or until
the top sensor is satisfied. This ensures a limited supply of hot water available in the
morning.
Solar Mode (Optional)
Econergy® THD3500

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MAINTENANCE
Looking after your Econergy® heat pump water heater is a relatively straightforward
job. We recommend the following guidelines be followed:
• Keep the air inlet and outlet (louvre and rear grille) clear of obstructions within
a 400mm distance
• Do not place objects on top of the outdoor unit or stand on it
• Switch off and cover the unit temporarily if mowing or edge trimming next to
the unit, to avoid debris entering the unit.
• Ensure the condensate drain tray is kept clear of debris
• In coastal areas we recommend coating the unit with a protective coating. This
can be supplied from the factory or by your authorized Econergy® agent
• Every 12 months, switch off the unit at the wall and wash the unit with soapy
water. The finned evaporator (gold colour behind rear grille) can be cleaned
by spraying a garden hose in between the fins. NOTE: THE UNIT MUST BE
SWITCHED OFF AT THE WALL DURING ANY CLEANING WITH WATER
Maintaining your Econergy® Heat Pump Water Heater
If going away for an extended period of time, the Econergy® water heater can be
turned off by turning the main isolating power switch off (located adjacent to the hot
water cylinder but not to be confused with the hot water back up box pictured on
page 6). Upon returning, the main white power switch is simply turned on again and
the unit resumes operation automatically.
Note: There may be a time delay of up to 8 minutes until the unit starts heating.
Going Away
Econergy® THD3500

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TROUBLESHOOTING
If abnormal operation occurs with your Econergy® heat pump water heater, please
read the following table to see what action (if any) is required.
If there is no hot water, remember that if the unit is connected to a ripple supply,
or night rate supply, the power company can turn off your hot water supply for
up to 7 hours per day! If the power company is turning off the supply for more than
7 hours per day, or there is a fault with your ripple control relay, please contact your
local power company for service.
If an unrecoverable fault occurs with your Econergy® heat pump unit, then the status
light will flash on and off and an audible alarm will sound. Before calling your local
sales and service agent (refer www.econergy.co.nz for contact details) or the
Econergy® Service team (0800 32 66 37), please check the following:
Fault Possible Cause Things to CHeck
No Hot Water, but heat
pump still running
A) Whole tank has been
drawn off
Estimate water flow volume
being used (a bucket under
the shower head will suffice)
and if approximately equal
to tank capacity then tank is
being dumped. Reduce
shower flow or water usage,
or install larger storage hot
water cylinder.
B Heat Pump has lost
refrigerant charge
Alarm will sound after
several unsuccessful
attempts to heat water.
Switch changeover switch to
position II (Backup element).
Call local service agent
www.econergy.co.nz or
0800 ECONERGY (0800 32
66 37)
Econergy® THD3500

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Fault Possible Cause Things to Check
No Hot Water, lights off
on status indicator
a) No power to hot water
cylinder
Check all switches are on,
there is power to house and
circuit breaker marked “Hot
b) Ripple control activated
Wait several hours until peak
load time is over. If ripple
remains out, contact power
company to address the
problem. If hot water is
immediately required contact
electrician to override ripple
control
Water temperature too
low
a) temperature valve set
incorrectly or
malfunctioning
Remove cap from top of
tempering valve and screw in
to increase water temperature.
Call plumbing installer if
temperature fluctuating or too
low
b) partial loss of refrigerant
or other sealed system
malfunction
Call local sales and service
agent (see
www.econergy.co.nz for local
agent or 0800 ECONERGY
(0800 32 66 37)
Hot Water supply OK
but alarm buzzer
operating and status
light flashing
a) Unit fault has occurred
and element is on
Reset heat pump unit by
switching main (white) switch
off and on again. Green light
should be lit and unit should
start heating again normally.
Check that ball valves are
open. If fault occurs twice in
succession, switch changeover
switch to position II (backup)
and call sales and service
agent refer
www.econergy.co.nz or 0800
ECONERGY (0800 32 66 37)
Econergy® THD3500

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Fault Possible Cause Things to Check
Heat Pump is not
running, status light off
and backup light is on
a) ambient temperature
below -3 degrees Celsius
No action required. Wait unit
temperature rises above -3
deg C and heat pump
operation will recommence
Water is dripping from
rear of unit (behind
finned evaporator)
a) This is normal as the
unit will remove moisture in
the air above 70% RH
(relative humidity)
No action required.
Econergy® THD3500

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ECONERGY® HP SERIES WATER HEATER
SPECIFICATIONS
General THD3500
Height 590 mm
Width 750 mm
Depth 300 mm
Weight 48 kg
Noise rating @ 1.5m 52 dBA
Circuit Breaker 16 amps
Rated Current RLA 4.4 amps
Refrigerant R-134a
Refrigerant quantity 520 gm
Ambient Air Temperature -3 to 40°C
Performance Specifications ** THD3500
Heat output 3000 W
Rated input 930 W
Recovery rate 57 L/hr
Efficiency (COP) 3.22 W/W
Water / Connections THD3500
Min Supply Pressure 50 kPa
Max Supply Pressure 800 kPa
Min/Max Inlet Water Temperature 5 - 50°C
Flow/Return Connections RP1/2” / 15mm
Condensate Drain 15 mm
Max Total Dissolved Solids 250 mg/L
Max saturation index -+0.80
**Rated at Conditions (25˚C / 15˚C / 60˚C /70%) (Cold water/ Ambient Air/ Hot
Water/70%RH )
Econergy® THD3500

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Econergy® THD3500
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HEAT PUMP WATER HEATER—THREE YEAR
WARRANTY INFORMATION
Congratulations on your purchase of a quality Econergy® heat pump water heater.
Econergy has a limited 3 year residential warranty on parts from the date of
installation if the unit has been certified as correctly installed and commissioned to
the current version of the Econergy installation manual by a suitable qualified
installer.
The sealed refrigeration system including the compressor, and the expansion device
have a THREE year parts warranty, including the water system, and electronics.
The comprehensive labour warranty is for 3 years. To be able to claim against this
warranty, the owner must send a completed “Installation Declaration Form”,
supplied with this manual upon completion of installation to:
Hot Water Heat Pumps Ltd, PO Box 21 586, Henderson, Auckland 0650
or email: i[email protected]
Warranty Service Exceptions
a) Travelling costs for repairs in excess of one hour’s drive from the service
agent’s designated place of business.
b) Consequential loss arising from failure of the product.
c) Additional cost of access to the unit, where it has been installed in an unusual
location.
d) Vandalism, accident or Acts of God.
This warranty does not apply to
a) Defects or failures due to incorrect or faulty installation. Please read the
installation instructions in the Installation manual and ensure these are
followed.
b) Defects or failure of the heat exchanger caused by hard or corrosive water.
c) Defects or failure caused by blockage of the unit due to foreign material such
as dust or debris e.g. Dog hair, grass, moss etc.
d) Damage to equipment caused by accessory or component used that is not
specified by Econergy®.
e) Inadequate electrical supply, voltage fluctuations, incorrect external wiring.
f) The product has been relocated to another property.
*This warranty is applicable only in New Zealand. For overseas warranty, please refer
to International Equipment Warranty.
Econergy® THD3500

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Owner’s Name
Product Serial Number Installation Date
Installation Address
Declaration: I have installed and commissioned this Econergy eater heater at the above
address in compliance with the manufacturer’s instruction manual.
COC NO:
Installer Company Name/ Trading Name
Installer Name Installer Email Address
Signed Date
Secondary Installer Company Name/ Trading Name
Secondary Installer Name (electrician or plumber) Installer Email Address
Signed Date
0800 33 66 33 | www.waterheating.co.nz 09 838 9444 | i[email protected]
3 Corban Ave, Henderson, Auckland 0612 |PO BOX 21 586 Henderson, Auckland 0650
WARRANTY REGISTRATION INSTALLATION DECLARATION
Installer to complete for customer warranty record
Econergy® THD3500