Waterco ElectroheatSubZero User manual

www.waterco.com
WARNING
!
HEAT PUMP
Electroheat
SubZero
Supplementary User
and Care Guide Manual
This equipment must be installed and serviced by a qualified technician.
Improper installation can create electrical hazards which could result in property
damage, serious injury or death. Improper installation will void the warranty.
Notice to Installer
This manual contains important information about the installation, operation and
safe use of this product. Once the product has been installed this manual must
be given to the owner/ operator of this equipment.

Table of
A NOTE TO YOU ----------------------------------------------------- 01
SubZero ------------------------------------------------------------ 01
GENERAL SAFETY INSTRUCTIONS -------------------------- 02
INSTALLATION INSTRUCTIONS ------------------------------- 03
Location of SubZero -------------------------------------------- 03
OPERATION OF YOUR POOL HEATER ---------------------- 04
Operation of Multifunction Electronic Control Panel ---- 04
To start-up the unit ---------------------------------------------- 04
To stop the unit --------------------------------------------------- 04
To raise or lower desired water temperature ------------- 04
Defrost cycle SubZero ----------------------------------------- 05
To select Pool or Spa mode ---------------------------------- 05
Automatic Pool or Spa Mode and Remote Control ----- 05
Winterizing -------------------------------------------------------- 06
Service Analyser Codes --------------------------------------- 07

A NOTE TO YOU
Thank you for buying our Waterco Heat Pump Pool Heater
A heat pump pool heater is a highly efcient, cost effective method of pool heating. Intelligent
operation and care will result in many years of enjoyment and pleasure. Please note that
this handbook is a complement to the general user handbook, therefore this does not
replace it.
SubZero (Technical Features)
Our Waterco SubZero Heatpump was specically developed to heat water through the use
of ambient air to a temperature lower than standard models. The defrost is carried out by
reversing the refrigeration circuit, thereby injecting hot refrigerant into the evaporator. It is
possible to quickly defrost the evaporator even when the temperature in the air is closed to
freezing point. This defrost cycle is not possible with standard machine since it is only carried
out by ventilation system.
It is strongly recommended to install a solar blanket on the swimming pool when the
temperature of the ambiant air is between 0 and 12 degres Celcius in order to limit heat loss
through evaporation. It is very important to understand that when there is a huge difference in
temperature between heated water in the swimming pool (high/hot) and the air temperature
(low/cold), heated water in the swimming pool will cool quickly.
In some case, if you don’t put a solar blanket when the ambiant air is very cold, the evaporation
will be equal to the input of heat from the heatpump. Therefore, the temperature of the water
will not rise.
I pg 01
Heat Pump Swimming Pool Heaters

To ensure your safety and the adequate functioning of your heat pump, all electrical work
should be performed by a fully qualied and licensed electrician in accordance with
local electrical codes.
An adequate circuit breaker and copper wiring must be used. Refer to the electrical installation
diagram found on the inside of the access panel. It may be necessary to install a ground
circuit breaker.
!
VITAL
GENERAL SAFETY INSTRUCTIONS
DO NOT STOP WATER FLOW TO THE HEATER FOR MORE THAN 8 HOURS WITHOUT
DRAINING IT.
WARNING
!
IMPORTANT
DEFROSTING IN LOW AMBIENT AIR TEMPERATURE CAN PROVIDE THE FORMATION
OF ICE AROUND THE HEAT PUMP.
WARNING
!
MAKE SURE THE INSTALLATION IS DONE ACCORDING TO THE INSTRUCTIONS OF THIS
MANUAL. SEE “INSTALLATION” SECTION.
MAKE SURE YOUR HEATER WAS PROPERLY GROUNDED AND BONDED. SEE “BONDING”
AND “BONDING DIAGRAM” SECTIONS IN THE GENERAL OWNER MANUAL .
THE UNIT MUST BE DISCONNECTED BEFORE OPENING THE ACCESS PANEL.
WARNING
!
The power cable ground must be connected to the electrical panel and to the ground
lug of the heat pump. An improper installation may be a potential cause of re, electrical
shock or injury.
WARNING
!

I pg 03
Heat Pump Swimming Pool Heaters
INSTALLATION INSTRUCTIONS
Location of SubZero
The location of the pool heater is very important in keeping installation costs to a minimum,
while providing for maximum efciency of operation as well as allowing adequate service and
maintenance access.
Mount the unit on a sturdy base, preferably a concrete slab or blocks which are elevated
from the ground. For the concrete slab, it is necessary to support the drainage of water by
establishing a gravel tank of 8 inches in width by 5 inches in depth.
The base should be completely isolated from the building foundation or wall to prevent the
possibility of sound or vibration transmission into the building. The size of the base should
not be less than the base of the pool heater.
Your Heat Pump will accumulate condensed water (approx. 1 to 1.5 Gallons or 4 to 6
Litres per hour), therefore causing water to drain out of the unit base.
Air is pulled through the evaporator coil and discharged through the top grill. Clearance
should be allowed in front and around the unit for unrestricted air discharge and service
access. See Figure 1.
IMPORTANT
Fig. 1
Top Discharge Models
1.5 m min.
60 to 91 cm min.
60 to 91 cm min.
60 cm min.
60 to 91 cm min.

OPERATION OF YOUR POOL HEATER
Operation of Multi-Function Electronic Control Panel
The display of the control panel is factory set to show pool water temperature in degrees
FAHRENHEIT. See “To select temperature in °C or °F” section in the general user handbook.
To start-up the unit
When the unit is turned “ON” or after a power shut down, the panel lights up to indicat “OFF”
or the temperature of the pool water circulating inside the heater. Program the desired pool
water temperature.
Once programmed, the fan starts and the compressor will start after a 3 to 5 minute delay.
NOTE: The fan motor and the compressor may start at the same time when the unit has been
stopped for a long period.
To stop the unit
The unit can be stopped by switching off the electrical power supply or by programming the
desired water temperature below actual pool water temperature. The unit will be “OFF” if the
temperature set point is below 15°C. The display indicates “OFF”.
To raise or lower desired water temperature
(Pool or Spa mode)
Push the SET key until you see POL or SPA. Press the UP or DOWN arrow only once and the
programmed temperature is displayed. Press the UP or DOWN arrow to increase or decrease
the temperature setting by one degree at a time. Once the control has been programmed
to the desired pool water temperature, the programmed temperature will be displayed
for approximately 5 seconds, then the digital display will return to the actual pool water
temperature.
• To toggle between
function
• Actual temperature and
setting display
• Pool Mode
• Compressor running
• Spa Mode
• To lower desired temperature
or to change settings
• To raise desired temperature
or to change settings
Touch Pad Description

I pg 05
Heat Pump Swimming Pool Heaters
To Select Pool or Spa Mode
The electronic board has the capability of memorizing two different programmed temperature
settings as follows:
For a pool maximum 35˚C
For a spa maximum 40˚C
To have access to either one of these programs, press the SET key until you see P-S and,
then pressing the UP or DOWN key; you can switch to POL or SPA. Once the heating mode
is programmed, it will be displayed for approximately 5 seconds, then the digital display will
return to the actual pool water temperature. The light on the right side of the display indicates
the chosen heating mode (See touch pad description on previous page).
Automatic Pool or Spa Mode and Remote Control
The digital control has the possibility to switch from Pool to Spa mode automatically using an
external water pressure switch connected to the Spa water line or a remote control. See the
general user handbook for installation instruction. For remote control operation, you will need
to set the Spa temperature to maximum 40°C and the Pool setting to ‘‘OFF’’ so that when the
remote control calls for heat it will activate the Spa mode and start the heater.
Contact us for more details on this feature.
Defrost Cycle SubZero
The interval time between the defrost cycle depends on the temperature of the ambient air
and of the humidity. During the defrost cycle, the ventilator stops functioning and the hot
refrigerant is injected into the evaporator in order to melt the frost. The defrost cycle last from
3 to 4 minutes.
If the heat pump carries out 5 consecutive short heating cycles (i.e. defrost cycles at every
15 minutes or less), the heat pump is then put into protection mode. These short cycles
mean that the conditions of the temperature and humidity do not make it possible to heat the
swimming pool. The heat pump is put into protection mode in order to preserve the consumer
of a non-effective use of electrical energy. In protection mode, the digital will display FS4.
FS4: During the protection mode, the ventilator turns ON for 30 minutes in order to cool the
evaporator. The heat pump restarts automatically when the external temperature is of 15°C.
Press any key to restart the unit.

Winterizing
If the unit is stored in a place where the temperature drops below the freezing point of 0°C, it is
mandatory that the water accumulated in the unit be drained completely before freezing
weather prevails. The water piping MUST be disconnected to drain the heat exchanger in
preparation for winter. Once the piping is disconnected, the unit MUST be emptied by tilting
it (75°) until all the water is out. It is recommended to rinse the inside of the heat exchanger
with a garden hose and to drain the unit once more. With the help of pool return winter plugs,
block the water Inlet and Outlet connections to prevent access by vermin. DO NOT leave the
water piping connected to the unit for the winter.
It is also possible to ll the heat exchanger with pool anti-freeze only, but ensure
that the anti-freeze contains an elevated pH to prevent corrosion. This is optional
and requires appropriate hardware.
!
VITAL
SUBZERO: WHEN CLOSED TO OR UNDER FREEZING POINT, WATER CIRCULATION TO
THE HEAT PUMP MUST NEVER BE STOPPED FOR MORE THEN 5 HOURS WITHOUT
COMPLETELY DRAINING THE HEAT EXCHANGER.

I pg 07
Heat Pump Swimming Pool Heaters
Service Analyser Codes
Most problems will be detected by the service analyser and a code will be displayed on the
digital display of your heater.
DISPLAY MEANING OF CODE
OFF The desired programmed temperature point is lower than 15°C.
LP & LP3 Shortage of refrigerant gas in the unit or faulty low pressure control.
The digital display will show LP3 after 3 LP faults and it will shut down
your pool heater. The pool pump will also be stopped for protection*.
See also FS code. If LP3 occurs you should call for service.
HP & HP3 Low water ow to the unit or faulty high pressure control. Check water
ow. Adjust bypass valves to allow full water ow. Backwash lter. The
unit will show HP3 after 3HP faults. This will stop your heater and the
pool pump for protection.*
Psd Pool Sensor Defective. The water temperature probe is open or
defective. Verify connections.
FLO & FL3 Possible causes:
- FIL parameter must be set to activate pool pump.*
- The lter is in backwash position.
- The lter pump is stopped.
- The lter is dirty.
- Shortage of water to pool pump.
- Water pressure switch must be adjusted or it is defective.
- The unit is in the protection mode and will show FL3, press any key
to restart the unit. FI3 code will stop your heater for protection. It will
also stop the pool pump to protect it from overheating.*
dPd Defrost Probe Defective. Suction temperature probe is open or
defective. Verify connections.
FS & FS4 Unit in the defrosting cycle. (The fan works but the compressor is
stopped). This is normal operation when outside temperatures are
cold.
After unit stop with “FS4” message, the unit is lockout for 30 minutes;
after this period, frost sensor temperature needs to reach 15°C to start
back the unit (over 15°C the “FS4” counter is reset). Pressing any
button will also reset this lockout condition.
* If unit’s internal time clock feature is used.

Waterco Limited ABN 62 002 070 733
(ZZM1332) 03/2010
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