TemperZone MAGNUS MWP Series User guide

Heat Pump Water Heaters
Application & Installation
Heating Capacity
26kW – 80kW
MWP Series - Pool Heating models
030-000-246

Page 2 of 24
Heat Pump Water Heaters
for Pools
Contents
MWP SERIES Page
General
Introduction 4
Design 4
Features 5
Application 6
Unit Selection 7
Installation 10
Piping 11
Electrical 12
Controller 13
Alternative Control Wiring 14
Commissioning 15
Maintenance 17
Troubleshooting 18
Servicing 19
Internal Unit Controller (UC8) 20
TZT-100 Operation 22
Commissioning Checklist 24
Overview brochure available
Pool
Heat Pump
Water Heaters
HE AT PU MP WAT ER H EAT ER S
Other relevant documents:
- Specication Sheets

Page 3 of 24
Heat Pump Water Heaters
MWP Series
Magnus®heat pumps water heaters by Temperzone utilise the
highest efficiency technologies to minimize energy consumption.
The MWP Series is specifically designed to deliver heated water
to pool applications. They reduce dependence on combustion of
fossil fuels by using clean energy sources. Durability and
reliability are also key features.

Page 4 of 24
Heat Pump Water Heaters
MWP Series
Introduction
Magnus®hot water heat pumps by Temperzone provide ideal
heating solutions as we move to a sustainable future using
cleaner energy sources.
Magnus Series heat pumps utilize the highest efciency
technologies to minimise energy consumption and are not
dependent on combustion of fossil fuels. They can deliver up to
6 times the heating energy output for every unit of electrical
energy consumed.
Magnus® MWP Series heat pump units are specically designed
to deliver heated water to pool applications only.
The Thermoshell®is designed to operate direct in-line with high
ow pool pumps, have low pressure drop and a low temperature
difference of nominal 3 degree temperature difference across
the heat exchanger.
Magnus®MWP Series heat pumps incorporate the proprietary
UC8 unit control module with sophisticated software installed
specic to the application of pool heating.
Typical applications include:
• Civic swimming pools
• Retirement homes
• Leisure centres
• Water parks
• Hotels and resorts
• Aquaculture
• Hydroponics
General
MAGNUS MWP, delivering
600%heating efficiency*
Heat pump water heaters are the most efcient way to heat a pool. MAGNUS pool heaters
are able to turn one unit of input power into as much as 6 units of output power. The 600%*
efciency compares well with 100% for electric resistance heaters, and 70-90% for gas
systems. The very low cost of operation means MAGNUS heat pump systems are the most
cost effective option for your pool.
5 kW free heat
energy from
environment
1 kW electrical
power input
6 kW heat
energy output
Comparative energy input and output for various pool heating technologies at typical operating conditions*.
MAGNUS Heat Pump
Electric Heater
Gas Heating
input
output
input
output
input
output
Comparing Energy Eciency
* conditions: 27/20°C db/wb outdoor ambient; EWT 27°C; LWT 30°C.
04
Figure 1

Page 5 of 24
Heat Pump Water Heaters
MWP Series
Energy Efficient
Each MWP system is comprised of a
refrigeration system with highly efcient
Thermoshell®heat exchangers to extract
‘free’ heat from the ambient air and
transfer it directly to water, and from there
to your pool.
Performance
For every 1kW of energy input, up to 6 kW
of energy output is produced, depending
on the ambient conditions.
ThermoShell® Technology
The unit includes a compact long life
highly efcient titanium water heat
exchanger design. It is resistant to
chemical corrosion from chlorine or salt
water and has a low pressure drop
compared to plate heat exchangers.
Compressor
Each high efciency compressor is
hermetically sealed, quiet running and
supported on rubber mounts to minimise
vibration.
Soft Starting (MWP 230 model)
Digital compressors are soft starting
therefore have none of the problems
associated with high in-rush current.
Durable
Coil ns are epoxy coated for extra
protection in corrosive environments, e.g.
salt laden sea air. Each MWP unit’s
cabinet is constructed from high grade
galvanised steel - polyester powder
coated (grey) for all weather protection
and is rated IP 44. External fasteners are
SKT® coated steel – marine grade. Heat
exchange coils comprise aluminium
corrugated plate ns on mechanically
expanded ried copper tube.
Insulation
Units are insulated to prevent external
condensation forming on the cabinet
exterior. The insulation is foil faced and
meets re test standards AS 1530.3
(1989) and BS 476 parts 6 & 7. Internal
piping is also insulated to minimise any
heat loss.
Control
Each MWP includes a TZT-100 Controller
which is pre-wired within the unit.
Different control strategies can be
accommodated in conjunction with
ltration and chlorination systems.
BMS control options are available.
Refrigerant
Each MWP unit is shipped from the
factory with a charge of R410A.
Quiet
The unit’s coil design permits low fan
speeds and hence low noise levels. The
compressor is isolated in a built-in,
insulated compartment to minimise
noise.
Unit Protection
Units are tted with a high pressure
lockout that protects the unit in the event
of water ow failure. Sensors protect
against low air coil temperature and loss
of refrigerant. Units include an anti-rapid
cycle timer for compressor on/off
protection.
Provision has been made for a water
pump ow verication input signal that
will protect individual units from a loss of
water ow.
Each compressor has internal overload
protection.
Wiring
A control panel, located in each MWP unit,
is fully wired ready to accept the main
power supply. The electrical supply
required is:
MWP 230KS:
1 phase 230 V a.c. 50 Hz, plus neutral and
earth.
MWP 250, 400, 800 KT
3 phase 400 V a.c. 50 Hz, plus neutral and
earth.
Each system complies with the
requirements of the Regulatory
Compliance Mark (RCM) for electrical
safety (AS/NZS 60335.2.40) and EMC
(AS/NZS CISPR.14).
Provision has been made for compliance
with DRED, ie demand response enabling
device standard AS/NZS 4755.3.1.
Peace of Mind
Temperzone operates a quality
management system that conforms to
AS/NZS ISO 9001:2008. The company’s
products have been selected, against
worldwide competition, for use in some of
the most exclusive projects — chosen
because of their proven efciency,
durability, performance, reliability and
value.
Accessory
1. Drain connection kit (25mm OD) -
supplied.
2. 10m extension lead for TZT-100
relocation, if required.
System Protection
1. HP and loss of refrigerant protection.
2. Anti-rapid cycle timer and internal
overload for
3. Compressor protection.
4. Circuit breaker control circuits.
5. Time-and-temperature controlled
electronic de-ice switch prevents icing
up of the outdoor coil during heating
cycle.
6. Sensor fault indication.
7. Compressor minimum run time to
ensure oil return.
8. 12V control circuit.
Self Diagnostics
The Unit Controller (UC8) has a LED
display to indicate faults and running
conditions.
Features

Page 6 of 24
Heat Pump Water Heaters
MWP Series
Application
Before installing any pool heating, a heat load assessment of
the pool should be rst conducted by consulting with a qualied
engineer. There is no simple ‘rule of thumb’ according to the size
of the pool. The following additional factors must be considered
before selecting a heat pump with appropriate performance to
suit the nature and proposed usage of the pool.
• Is the swim season summer fringe, off season or all year
round?
• What are the climatic conditions at the location of the pool
installation? (Summer/Winter)
• What water temperature is the pool to be maintained at
whilst in use?
• Is the pool in direct sunlight, predominantly shaded or
indoors?
• Is a pool thermal insulation cover to be used correctly while
the pool is not in use?
• If below ground, is it in an alluvial/gravel soil type?
A pool cover is highly recommended for heat retention and
energy savings (Figure 2).
An alternative consideration for selecting heat pump capacity is
the heat-up time from cold. Pools have a huge thermal mass so
pool temperature does not change rapidly with the operation of
the heat pump. A typically sized heat pump could take several
days to elevate the pool temperature from cold to desired
setting. If a pool is only used intermittently through the colder
period, then a selection based on minimum heat-up time may
be required for the heat pump capacity.
Figure 2 Heat Loss
Large heat loss
(Uncovered)
Lower heat loss
(With cover)
Small heat loss
to ground
Magnus heat
input to pool

Unit Selection
As discussed on the previous page, there are many factors that need to be taken into account when sizing a Pool
Water Heater. The minimum information you require to use this Selection Guide are:
i. Your pool surface area,
ii. A prediction of the usage of your pool, and
iii. Location.
The following selection procedure is for OUTDOOR pools. For INDOOR pools, contact Temperzone for a list of additional information
required to make a more accurate unit selection.
STEP 1. Identify the Heating Prole that suits Your Intended Use & Location in Table 1 (proles A to N)
If your city is not listed, use the nearest one, or contact Temperzone Sales.
STEP 2. Determine Required Heating Capacity of MWP unit
by reading from your Pool Surface Area up to your Heating Prole , then go left to the Required Capacity (Graph 1).
STEP 3. Determine which MWP unit meets the capacity requirement
move from Required Heating Output across to the model peak capacity line (Graph 2).
STEP 4. Check other factors that may alter this recommendation up-or-down a model size
refer Notes below and exposure allowances on next page.
Table 1. Outdoor Pool Heating Proles by Location
Usage: Extended Season (October – April) All Year (Peak in July)
Operation: 8am – 6pm (10 hours/day) 8am – 6pm 24 hours
Pool Cover: 4pm – 9am MIN AVG
operating
ambient
No cover used MIN AVG
operating
ambient
4pm – 9am MIN AVG
opertaing
ambient
4pm – 9am MIN AVG
operating
ambient
Pool temp.: 25°C 28°C 32°C 25°C 28°C 32°C 25°C 28°C 32°C 25°C 28°C 32°C
Australia
Adelaide M L J 17 H G E 17 J H G 11 L L K 10
Brisbane N M K 18 J H F 18 L J H 14 M L L 13
Cairns n/a n/a M 26 N L H 26 N M K 22 N N M 20
Canberra M L J 15 H G E 15 J H G 7 L L K 5
Darwin n/a n/a n/a 28 n/a N L 28 n/a N M 27 n/a N N 24
Hobart K J H 14 H F E 14 J H G 8 L L K 7
Melbourne M L J 15 H G E 15 J H G 10 L L K 9
Perth N M K 18 J H F 18 L J H 14 M L L 13
Sydney N L K 17 J H F 17 K J H 13 M L K 11
New Zealand
Auckland L K H 16 H F E 16 J H G 12 L L K 11
Hamilton H F D 13 D B A 13 E D C 7 H E D 5
Taupo H F D 13 D B A 13 E D C 7 H E D 5
Wellington L K H 16 H F E 16 J H G 12 L L K 11
Christchurch H F D 13 D B A 13 E D C 7 H E D 5
Dunedin H F D 13 D B A 13 E D C 7 H E D 5
For other locations, contact your nearest Temperzone Sales ofce.
Note:
1. A thermal pool cover is highly recommended, if not mandatory in some Cities/States when using pool heating devices.
Heating proles for use without a pool cover is more for illustrative purposes to demonstrate heat losses without a cover,
which are signicant.
2. Longer daily operating hours of the heat pump will reduce the output capacity required to maintain pool temperature.
3. Nominal heating proles based on the following operating parameters:
- Hours of use (cover off) from 9 am to 4 pm, 7 hours.
- Nominal Heat Pump operating hours are limited to between 7 am and 5 pm. These may be subject to ltration pump
operating hours.
- 24 hour operation of heat pump (IF PERMITTED) can halve the required heat pump output capacity, eg when a 10 hour
operation of the Heat Pump appears marginal for duty, a couple extra hours operation may satisfy requirements.
4. Adjustment to heating prole requirements can be made for deviation to the tabled specications,
eg for cover off 4 hr/day, deduct 20% from required capacity; for cover off 10hr/day add 10% to required capacity.

OUTDOOR POOL EXPOSURE (allowances made in above heating proles)
- Minor shading up to 25% at peak of winter. For 50% shading, add 10% to required heat pump capacity.
- Moderate exposure to wind. For high wind areas add 25% to required heating capacity. For sheltered areas deduct 25%.
- No allowance for water features. For Innity Edge, add equivalent area to pool surface area. For Waterfall, add 3 times area to pool
surface area.
- Average depth 1.5m nominal in ground pool. Additional heat loss expected for walls exposed to air or ground water.
- Number of swimmers entering pool each day based on 1 per 6m2 pool area, i.e. 10 swimmers per day entering a 60m2pool.
SELECTION EXAMPLE.
50m2 pool, Sydney, 28°C extended season only, no cover gives Prole H; with cover Prole L.
Selection: Given average day temperature during operation of 17°C, with no cover, model MWP 400 falls marginally short, whereas
with a cover a MWP 250 will maintain pool temperature comfortably, with less running hours.
100
90
80
70
60
50
40
30
20
0
Required Capacity (kW)
Pool Surface Area m2
20 40 60 80 1000
K
J
120
F
BH
N
CEG
L
Graph 1 - Pool Heating Profiles
A
M
D
50
10
10 90
70 11030
100
90
80
70
60
50
40
30
20
10
0
Heat Output kW
Average Temperature °C (dry bulb) during operation
10 15 20 25 305
MWP 250
MWP 230
MWP 400
MWP 800
Multiple units
required
Graph 2 - Nominal Output During Operating Hours
7 2717
Unit Selection (continued)
Key
A. 3500–4000 W/m2
B. 2500–3500 W/m2
C. 2100–2500 W/m2
D. 1500–2100 W/m2
E. 1250–1500 W/m2
F. 1000–1250 W/m2
G. 800–1000 W/m2
H. 600–800 W/m2
J. 450–600 W/m2
K. 300–450 W/m2
L. 200–300 W/m2
M. 100–200 W/m2
N. < 100 W/m2
Disclaimer
Temperzone Ltd takes no responsibility for
the completeness, reliability and accuracy
of this information. It is a guide only. Any
action based on this information is strictly
at your own risk. Consult a professional
consultant for the most accurate selection
for your application.

Page 9 of 24
Heat Pump Water Heaters
MWP Series
Application
Magnus heat pumps utilize the refrigeration process to extract
heat from ambient air and deliver that heat to a duty
requirement. The heat pump operates most efciently at the
highest ambient air temperature, so it is best to operate through
the middle of the day rather than in the evenings.
Avoid installation in closed-in areas where the air recirculates
through the unit and a cold micro-climate can develop around
the unit diminishing its performance. If a unit is to be installed in
an enclosed room or space (eg plant room, enclosed courtyard),
then that space should be ventilated to prevent the enclosure
temperature falling to less than 5 degrees below outside
ambient temperature. The fan discharge from the unit may be
ducted directly to outside the enclosure provided the air ow
resistance does not exceed 25Pa. A boost extract fan may be
required. Refer to Temperzone for advice on duct sizing.
The air discharging from the unit is quite cold and possibly
below freezing temperature at low ambient conditions. Care
should be taken that this air is not discharging under windows
or plants which are sensitive to the cold. It is possible that
condensation will form on surfaces above the unit so be
cautious that these surfaces are not sensitive to deterioration
from moisture.
It is a normal process for ice to form on the evaporator coil
during operation at ambient temperatures below 5 degrees.
Each Magnus pool heating unit has a fully automated de-ice
system.
Condensation will run continuously from the unit during
operation – more so after a de-ice cycle has been completed
and a large volume ice has been melted off the coil. Care should
be taken with the installation where this condensate runs off to.
If this condensate is likely to form a hazard on an access path
then the unit should be placed in a drip tray and drained to a
waste point.
Consideration will need to be given when integrating the
operation of the heat pump with automatic chlorination
equipment on the same pool pump to prevent over chlorination.
Longer run time for the heat pump will be required during the
colder months so chlorinator dosage rate will need to be
reduced.
Any application and installation must comply with local/national
codes and regulations.
Piping
Piping
Piping
Piping
PREVAILLING
WIND
FAN
COLD AIR
OUTDOOR AIR
DUCT
Plant room
Enclosed space

Page 10 of 24
Heat Pump Water Heaters
MWP Series
Installation
Follow these Installation Instructions to ensure optimum
performance, reliability and durability.
Units must be installed in accordance with all national and
regional regulations and bylaws. National Health and Safety
regulations must be followed to avoid personal injuries.
The appropriate local permits must be acquired and
adhered to.
Local regulations on maximum boundary noise need to
be considered when positioning the unit.
Remove equipment from packaging and inspect for transit
damage. Report any damage immediately
to Temperzone.
Dispose of packaging in an environmentally
thoughtful manner.
WARNING: Keep appliance area clear and
free from combustible materials, gasoline
and other ammable vapours and liquids.
The Magnus MWP heat pump should be located on a rigid base
or foundation, eg concrete pad, and set on rubber vibration
isolation pads.
Allow sufcient space around the unit to facilitate water pipe
connection, future service, and maintenance requirements,
working space in front of the electrical panel and unobstructed
air ow through the unit. Refer to the minimum clearance
requirements illustrated here (Fig.3a) and pages the relevant
Specication Data sheet supplied for your model.
In all installations it is preferred that the coil be installed
perpendicular to the wall (Fig.3a). In installations where this is
not possible, the unit must be installed with a minimum of
500mm clearance between the coil and the wall (Fig.3b). If
multiple units are installed adjacent there must be 1m clearance
between facing coils.
There must be no restriction to air ow above the unit.
Figure 3a Minimum Clearances
500mm
Set the unit on rubber vibration isolation pads
Minimum
1000mm min. clearance
750 MIN. CLEARANCE
750 MIN. CLEARANCE
1000 MIN. CLEARANCE
500 MIN. CLEARANCE
WATER
CONN’S
ELECTRICAL
PANEL
ACCESS
PANEL
Figure 3b Alternative Orientation

Page 11 of 24
Heat Pump Water Heaters
MWP Series
Piping
The MWP Heat Pump should be located at close proximity to
the pool, pump and lter as practicably possible. Keep pipe
length as short as possible with as few bends and restrictions
as possible. Restricted ow may result in high pressure faults
occurring. Connecting pipework may be insulated to minimize
heat losses and prevent freezing in sub-zero ambient. The Heat
Pump must be installed after the water lter and before the
chlorinator.
The titanium thermoshell heat exchanger has a very low water
pressure drop in operation so a secondary boost water pump
should not be required for most residential applications but may
be required for commercial applications. The pool pump should
be sized to provide sufcient ow for the operation of the heat
pump. If the pump ow is excessive for the heat pump
operation, then that excess ow may be bypassed around the
heat pump via a balancing valve per the included schematic.
Model Water IN & OUT Connections Nominal water ow rate
MWP 230 11/2” (38mm) PVC union 125 l/min. (2.08 l/s)
MWP 250 11/2” (38mm) PVC union 130 l/min. (2.16 l/s)
MWP 400 2” (50mm) PVC union 200 l/min. (3.33 l/s)
MWP 800 2” (50mm) PVC union (2 pair) 400 l/min. (6.66 l/s)
Figure 4 External Piping Schematic
– typical single unit installation
Note: Multiple units, installed in-series or in-parallel, may require
additional pumps to service the ow required.
Installation
MWP unit
Pressure PVC piping
Single MWP Heat Pump Piping
3 way
valve
Flow
Switch Filter
Chlorinator
device
Return
from
Pool
Supply
to Pool
Pool
pump
3 way
valve

Page 12 of 24
Heat Pump Water Heaters
MWP Series
Electrical power wiring must be installed and certied by
persons with appropriate qualications.
• All power wiring is to be done to the appropriate electrical
standard of the country in which the unit is being installed.
• The person installing the wiring is responsible for the correct
selection of wiring size and auxiliary components.
• Wire the unit directly from the electrical Distribution Board.
The unit should have its own dedicated circuit breaker on the
Distribution Board.
• Route the power supply cord through the orice next to the
water connections.
• A signed ‘Certicate of Compliance’ must be left with the unit
for insurance purposes.
Model Power Supply Max. Running
Current
MWP 230 Single Phase 230V ac 50Hz 35 A
MWP 250 Three Phase 400V ac 50Hz 17/15/15 A
MWP 400 Three Phase 400V ac 50Hz 20/18/20 A
MWP 800 Three Phase 400V ac 50Hz 38/36/38 A
Figure 5 Controller Wiring
Electrical
MWP Unit
12
B
A
0V
B2
A2
UC8
12
0V
TZT-100
E
N
L1
L2
L3
Power Supply
1Ø (2 core+E)
or
3Ø (4 core+E)
depending on unit
External
Protection
Isolator
Control
- shielded
twin twisted pair
4 core
T
T
Return Water
Temp. Sensor
B
A
24
24C
T
T
v1
v2 pre-wired inside MWP

Page 13 of 24
Heat Pump Water Heaters
MWP Series
The Magnus MWP Series pool heat pump comes factory tted
with a TZT-100 temperature controller – a multi-function
programmable device that can control the time of operation of
the pool water pump in conjunction with the operation of the
heat pump.
The controller is pre-congured/pre-wired within the electrical
panel, but may be re-located to another location (out of the
weather) within the home or a control room if this is more
convenient to make regular adjustments to the operation, eg
desired pool temperature. (A 10m extension cable is supplied.)
The programmed time of operation function of the TZT-100
may be set up so that the heat pump only operates during the
optimum higher ambient temperature time of day, but not
during the night if the pool pump is programmed to operate at
night.
Install a ow switch in series with the remote on/off input.
Alternatively, a relay that switches when the pump is energized
can be used to only start the unit when the pump is running.
Control Methods
There are three potential types of operation:
Type A: TZT-100 is always ON, however the heat pump
operation is only enabled with the time clock operation of the
external Pool Pump & Filtration/Chlorination system (supplied
by others). (Requires TZT-100’s DIP switch 6 ‘ON’ and DIP switch
8 ‘ON’ for a single set point).
Requires pump relay with dry contacts to make/break remote
ON/OFF on the UC8 control board.
Type B: TZT-100 is enabled using its own time clock, and the
heat pump will operate and provide a signal to operate a
dedicated external pump at the same time. This pump is
independent of ltration and chlorination equipment. (Requires
TZT-100’s DIP switch 6 ‘ON’ and DIP switch 8 ‘ON’ for a single
set point).
Requires dry contacts AUX on UC8 board wired to control relay
coil (12V dc) for external ltration pump relay or dedicated
external boost water pump.
Type C: Manual control, independent of ltration and
chlorination equipment operation. (Requires TZT-100’s DIP
switch 6 ‘OFF’).
Note:
1. The communications cable and sensor wire must be installed
away from any power cables to avoid the possibility of
electrical interference.
2. The unit must NOT be switched off in freezing conditions.
Figure 6. TZT-100
Controller
Features
• LED to indicate status of the unit [Power On/Off].
• Real time clock.
• 12 or 24 hour time display
• 7 day/2 event programmable Start/Stop timer
• °C or °F display
• On demand countdown run timer, up to 9 hours.
• Auto-Restart or No Restart after power failure
• Backlit screen for ease of reading;
• Soft touch tab keys
• PIN protected menus (Installer PIN)
• Keypad and/or temperature lock
• Integrated Modbus option
• Battery backup (Lithium).
• Audible beep to acknowledge key entry
• 24V control cable.

Page 14 of 24
Heat Pump Water Heaters
MWP Series
Other options include:
1. Universal 24V ac or 12V dc dry contact for either compatible thermostat or BMS control via input/output.
2. BMS control via Modbus over RS485.
For a full list of the Modbus control setup, settings and read/write parameters refer Appendix I or contact Temperzone for details or
visit www.temperzone.com; model search ‘BMS’.
Figure 7
Alternative Control Wiring
MWP Unit
12
B
A
0V
B2
A2
UC8
UC8
UC8
UC8
12
0V
TZT-100
T/stat Options
24V AC
option*
Alternative
compatible
thermostat
or
BMS
(independently
powered)
E
N
L1
L2
L3
Power Supply
1Ø (2 core+E)
or
3Ø (4 core+E)
depending on unit
External
Protection
Isolator
COMP
HEAT
On
0V
Optional
Remote On/Off
(remove link if used)
CP
HT
C2
Optional
Communicating
BMS Controller
Modbus RTU
12V DC
option*
B1
A1
0V
B
A
REF
Control
- shielded
twisted pair
2 core + screen
link
Control
- shielded
twin twisted pair
4 core
*Use either option; NOT both.
UC8
(AUX)
Optional
Run Status N/O
C
N/C
12
VC
0V
T
T
Return Water
Temp. Sensor
(located base
of ThermoShell) Ye
Water flow
switch
E
N
A
Pump
Interlock
OR
1
2
1
2

Page 15 of 24
Heat Pump Water Heaters
MWP Series
A Commissioning Checklist is included on the back page to
assist you with the commissioning process.
Power
WARNING! Do not turn the unit on until the external water pump
is switched on and water is owing through the unit.
a. Check the units are electrically connected in accordance
with the wiring diagram (refer Specications Sheet or unit
label).
b. Check all wiring connection and terminal tightness.
c. Check the dip switch settings on the TZT-100 and UC8
controllers match those on the MWP wiring diagram.
d. Remove the shipping blocks from beneath each compressor.
Check that each compressor is securely mounted.
e. Ensure the Temperature Controller (thermostat) is OFF.
f. Switch ON the Mains distribution board circuit breaker, the
internal circuit breakers and the unit’s external ON/OFF
switch.
g. Check the supply voltage.
h. Check the communications cable and sensor wire are
installed away from any power cables to avoid the possibility
of electrical interference.
i. Once started, check for correct rotation of the compressor. If
rotation is incorrect the compressor will not pump, be noisy
and draw low current. To correct motor rotation, swap two
phases at the mains power terminals.
TZT-100 Quick Start Guide
1. Power on the MWP unit at the isolator switch.
2. Push TZT-100 Power button.
3. Push [mode] button and select ‘Heating’.
The MWP unit will operate continuously, rst to reach then
maintain the target temperature. The default target water
temperature suitable for a pool is 28°C (Note, it will take up to 60
hours from cold state to reach and comfortably maintain
temperature – depending on the outdoor ambient and ground
temperatures).
The compressor should start, and after a few seconds the fan
should also start. If not, refer Troubleshooting section.
The unit is programmed to operate on its own based on the
TZT-100 timer settings or using a remote on/off signal.
Refer TZT-100 Operation instructions for more detail (p.20).
TZT-100 Advanced Installer Settings
Advanced Set-up will depend on the control method being
implemented (refer page 10) . A separate ‘Installer manual’ is
supplied with the TZT-100 covering advanced installation and
operation instructions.
Use following instructions for setting up the TZT-100 for the
type of operation required. There are a few factory settings that
must remain unchanged, regardless of the type of control
method to be used.
Dip switches 1, 2, 3, 5, 7 all set to OFF
position.
Dip switch 4 set to ON position.
Dip switches can be viewed by separating
the front interface from the back panel
using a at head screw driver in the base
slot.
1. TZT-100 dip switches 6 & 8, to be set as required, according
to the chosen control method (refer page 10).
2. Enter the Installer menu:-
Press and hold O/RIDE button until the gures ‘88:15’
appears on the display (after about 15 seconds). Adjust this
gure to ‘88:21’ by pressing the up (▲) or down (▼) buttons,
then tap O/RIDE again to enter the menu.
Using the Installer menu, tap O/RIDE button to move forward
through the menu, tap PROG button to move backward
through the menu. Press up (▲) or down (▼) button to
adjust the value of each function.
3. Set the highest water temperature the user is permitted to
set the heat pump to run up to, as follows:-
Move through the Installer menu until HL=35 (default)
appears in the display. Press up (▲) or down (▼) button to
adjust the value in the range: 22°C — 28°C for a typical pool.
4. Check the setting of the T-T terminals that the water
temperature sensor is connected to:-
Move through the Installer menu until ‘tt=RS’ (default)
appears in the display. The default setting is correct for this
application. If the factory default is not showing then scroll
up (▲) or down (▼) until ‘RS’ appears.
5. Check the calibration of the water temperature sensor:-
Move through the Installer menu until the function ‘C1=3.0’
(factory default) appears on the display. If not, adjust ‘0.0’
by pressing the down (▼) button in 0.1 increments.
6. Exit the Installer menu by pressing PROG button.
Commissioning

Page 16 of 24
Heat Pump Water Heaters
MWP Series
Commissioning (continued)
General Checks
a. Check that the air ow over the coil is not restricted and that
the fan is running smoothly.
b. Check the unit is installed level and that condensate drains
freely by pouring some water into the base tray.
c. Check the operation of the thermostat or BMS.
(Satellite symbol on TZT-100 indicates communicating.)
d. Check connection pipes have been insulated.
e. Leave all relevant documentation with the unit.
f. Check for leaks at water connections.
De-Ice Cycle
Under normal operation in cold conditions the coil will at times
change to a white appearance as a frost forms. The unit is
programmed to de-ice no more frequently than once every 50
minutes. At the end of each de-ice cycle, the coil should be
completely clear of ice. Should a layer of clear ice form on the
coil, then contact your Installer or Temperzone Customer
Service (www.temperzone.biz).
Protection Against Freezing
If the outdoor ambient temperature falls close to freezing point
the external pump must continue to circulate water to prevent
freezing, whether heating is called for or not.
At Four Weeks
a. Check compressor compartment for oil stains indicating
refrigerant leaks.
b Check tightness of electrical connections.
Yearly
a. Check tightness of all fan and motor mountings.
b. Check tightness of electrical connections.
c. Check that fan motors are free running.
d. Check condensate drains for free drainage.
e. Check for leaks at water connections.
f. Check and remove as necessary any organic material and
dust accumulation from coil ns and inside the fan chamber
(power off). In corrosive environments, the checking and
cleaning frequency should be increased.
g. Touch up any unit paintwork damage to prevent corrosion.

Page 17 of 24
Heat Pump Water Heaters
MWP Series
Page 17 of 24
Maintenance
At Four Weeks
a. Check compressor compartment for oil stains indicating
refrigerant leaks.
b. Check tightness of electrical connections.
Yearly
a. Check tightness of all fan and motor mountings.
b. Check tightness of electrical connections.
c. Check that fan motors are free running.
d. Check condensate drains for free drainage.
e. Check for leaks at water connections.
f. Check and remove as necessary any organic material and
dust accumulation from coil ns and inside the fan chamber
(power off). In corrosive environments, the checking and
cleaning frequency should be increased.
g. Touch up any unit paintwork damage to prevent corrosion.

Page 18 of 24
Heat Pump Water Heaters
MWP Series
Troubleshooting
Water temperature varies significantly from its setting
• Unit may have been incorrectly sized for the pool.
• Unit may be in a protection or diagnostic failure mode
Unit does not seem to deliver the heating when most
needed
• Heating capacity at design conditions may be incorrect. As the
outside temperature falls, heat losses increase.
• Check the unit’s Specications for information on the
minimum/maximum operating temperatures.
For a new installation, why does it take some days
before the heat pump unit seems to work properly?
• Many new pools have a large amount of concrete and other
structural materials that are generally cold and full of moisture.
This is most evident in the winter when trying to heat the pool
water from scratch.
• Allow sufcient amount of time for unit to heat the pool. This
could be up to 60 hours. Start heating well before you need the
warmth most.
• Units need to be checked regularly to ensure proper operation
and that they are not exceeding operating limits for any length
of time.
Unit runs excessively – the pool temperature remains
too cold in winter.
• Keep doors and windows to indoor pool areas closed. This
area may require heating.
• Apply a pool cover on both indoor and outdoor pools. This will
reduce heat lose and also help keep the pool clean.
• Location of remote temperature sensor may be wrong. (The
standard location is at the base of the ThermoShell.)
• Check top air discharge is unblocked and air ow to the coil
face is clear and not restricted or blocked.
• Check no ice is forming on the coil between de-ice cycles
(Refer 7.10).
TZT-100 displays an error code or doesn’t operate as
expected.
Refer to page 26 for troubleshooting symptoms and faults.
Contact your Installer or Temperzone if problems persist.
Unit Controller (UC8) displays an error code
Refer to UC8 Controller label on the unit for operation & fault
diagnostics information; or visit www.temperzone.com and
model search ‘UC8 Controller’. Here you will also nd a ‘UC8
Troubleshooting Guide’.
Check the UC8 Controller dip switch settings match those on
the wiring diagram.
Unit Does Not Start
• Circuit breaker may have been tripped. Reset circuit breaker.
• Unit may be off or in wall thermostat mode. Check unit is
switched on at the unit, and external temperature controller is
in Heating mode.
• Unit may be in a protection or diagnostic failure mode. Check
for fault code display on unit’s controller board (refer also 6.5).
Water Dripping Outside
Condensation released during unit operation is normal.
If a condensate drain has been installed and it is connected to a
drain system:
• Check gaskets and ttings around drain for leaks and plugs.
• Check drain line is unblocked.
Ice or Frost Forms On Unit’s Coil
Under normal operation in cold conditions the coil will at times
change to a white appearance as a frost forms. The unit is
programmed to de-ice no more frequently than once every 50
min. At the end of each de-ice cycle, the coil should be
completely clear of ice. Should a layer of clear ice form on the
coil, then contact your Installer or Temperzone Customer
Service (www.temperzone.com).
WARRANTY & TECHNICAL SUPPORT
Please refer to the separate warranty document supplied with
the unit, or visit www.temperzone.biz for details.
Australia:
[e-mail]
[e-mail]
Telephone: [phone]
New Zealand:
nztechnical [e-mail]
Telephone: 0800 TZWARRANTY (899 2777)

Page 19 of 24
Heat Pump Water Heaters
MWP Series
Ducted Split Systems R32
Air Conditioners
Servicing
Page 19 of 24
Table1,InformationavailableontheUC8display.
Item
Unit
Abbreviation
Examples
CompressorsuctionlinepressurekPaSLP
Suctionlinepressure1034kPa
Evaporatingtemperature°CEt
Evaporatingtemperature12°C
Compressorsuctionline
temperature
°CSLt
Suctionlinetemperature18°C
Compressorsuctionsidesuperheat K SSH
Suctionsidesuperheat6K
CompressordischargelinepressurekPadLP
Dischargelinepressure2447kPa
Condensingtemperature°CCt
Condensingtemperature42°C
Compressordischargeline
temperature
°CdLt
Dischargelinetemperature70°C
Compressordischargeside
superheat
K dSH
Dischargesidesuperheat28K
Deicesensortemperature
(locatedonfinsoftheoutdoorcoil)
°CICEt
Deicesensortemperature39°C
Capacity % CAP
Capacity100%
Expansionvalve1opening % EE1
Expansionvalve175%open
Expansionvalve2opening % EE2
Expansionvalve275%open



B
A
Ground
+12V DC
B
A
Ground
0-10V out #1
Ground
0-10V out #2
Ground
Water Pump
Sc (Ground)
Remote on/o
Ground
RS485 #1
RS485 #2
Display
Push Button
Internal Unit Controller (UC8)
Heat Pump Water Heaters
MWP Series
Servicing

Page 20 of 24
Heat Pump Water Heaters
MWP Series
The UC8 implements system protection functions such as
indoor coil frost, extreme high and low pressures, rapid
on-off cycling of the compressors, loss of refrigerant and
more.
The following applies to all protection functions except
where otherwise indicated:
Unit operating capacity may automatically be reduced
before a protection function is activated. Such a reduction
may be sufcient to prevent an actual trip from occurring.
When a compressor is stopped by a protection function
it is held off for a period of 3 minutes, after which it is
allowed to restart (provided the cause of the trip has
cleared).
When a protection function is active and when a unit is
locked out the alarm relay output “FLT” is active.
More detailed information about protection functions and
troubleshooting refer to document “UC8 troubleshooting
information”, available for free download from
www.temperzone.biz.
1 High pressure protection (HP)
Units are tted with high pressure transducers connected
to UC8 input HPT. A compressor is switched off when the
discharge line pressure reading exceeds 4238 kPa.
The display shows the letters ‘HP’ when protection
is active.
2 Low pressure protection (LP)
Some units may be tted with low pressure switches.
These switches connect to UC8 inputs IN#2. When a low
pressure switch activates (the electrical circuit opens)
then the compressor is stopped.
Some HWP units are tted with low pressure transducers
connected to UC8 input LPT. A compressor is switched
off when the suction line pressure reading falls below 228
kPa.
The display shows the letters ‘LP’ when protection
is active.
3 High discharge line temperature protection
The controller monitors the compressor discharge line
temperature via a sensor connected to input ‘DL’ (red
wires). The compressor is stopped when:
• The temperature rises above 110°C for longer than 30
minutes.
• The temperature rises above 120°C (immediate action).
The display shows the message ‘Hi-t’ when
protection is active.
4 High discharge superheat protection
Discharge superheat is dened as the difference
between the compressor discharge gas temperature
and the condensing temperature. When this temperature
differential becomes very high it is an indication that
the compressor is being starved of refrigerant gas.
Common reasons for this could be a lack of refrigerant
(under-charged or loss-of-charge) or a problem with the
expansion device (for example a stuck accurator or loose
wiring to an EEV).
The protection is activated when discharge superheat
exceeds 45K for longer than 30 minutes.
The display shows the message
‘Hi-dSH’ when protection is active.
5 Low discharge superheat protection
Discharge superheat is dened as the difference
between the compressor discharge gas temperature
and the condensing temperature. When this temperature
differential stays very low it can be an indication that
the compressor is being ooded with liquid refrigerant.
Common reasons for this could be an excess of
refrigerant (over-charged) or a problem with the
expansion device (for example loose wiring to an EEV).
The protection is activated when discharge superheat
remains below the threshold for longer than 15 minutes.
The threshold varies linearly from 0K at standard mode
minimum capacity (40%) to 10K at nominal capacity
(100%).
This protection function is disabled when a compressor
operates at less than standard mode minimum capacity
(< 40%).
The threshold for a variable speed compressor operated
in boost mode (capacity above 100%) is xed at 10K.
The display shows the message
‘LO-dSH’ when protection is active.
6 High evaporation temperature / high suction line
temperature protection
The unit has a low pressure transducer connected to
the compressor suction line. The controller calculates
the evaporating temperature from the suction line
pressure reading. Additionally the controller monitors
the compressor suction line temperature via a sensor
connected to input ‘SL’ (white wires).
The protection function stops the compressor when:
• The evaporating temperature remains above 27.5°C for
longer than 15 minutes.
• The suction line temperature remains above 30°C for
longer than 15 minutes.
The display shows the message ‘Hi-SL’
when protection is active.
Internal Unit Controller (UC8) Protection Functions
Heat Pump Water Heaters
MWP Series
Servicing