Specifications
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3.5  Water Pump Connection
How do I connect up my new  
EVO heater to my pool or spa?
The EVO JBox is the answer. The JBox 
will save you money on water pumps  
and running costs.
The JBox allows either the heater  
OR the chlorinator to supply power  
to the water pump so each system  
can run independently of the other.
Installation Options
There are 3 methods to install an  
Evo heat pump.
1. Slave Mode
Heater is connected to the ltration  
system but relies on water ow from  
the chlorinator for start and stop times.
Advantages
•  Only 1 pump needed – savings on 
purchase and running costs.
Disadvantages
•  As the heater may need to run 
18+hrs a day the chlorinator will 
need to be adjusted to allow the 
pump to run longer. This can  
cause water chemical balance  
issues resulting from over or  
under chlorinating the pool. You  
will need to constantly monitor  
and ddle with the chlorinator  
output to keep it. 
2. Seperate Systems
Heater runs on a dedicated circuit  
to the ltration system. The heater  
controls the start and stop times  
of this pump.
Advantages
•  Easy to use – set and forget the heater operation and leave your chlorinator to  
work as normal
•  No water balance issues due to adjusting the chlorinator running time.
Disadvantages
•  Purchase of 1 extra water pump at up to $800
•  Electrical use from this pump could add up to over $1000 per year
3. EVO JBox
Heater is connected into the ltration plumbing. After installing the Evo JBox and having your 
electrician hard wire the JBox to the heater, simply plug the water pump into the JBox and 
plug the JBox into the Chlorintor. 
Advantages
•  Only 1 pump needed – savings on purchase and running costs
•  Save up to $1000pa on electricity
•  Easy to use – set and forget the heater operation and leave your chlorinator to  
work as normal
•  No water or chemical balance issues due to adjusting the chlorinator running time
Disadvantages
•  None!
Order an EVO JBox with your heater and relax in your pool while maximising the savings. 
3.6  Drainage
Whilst the heater is operating, water in the air condenses on the ns of the evaporator. In  
the instance of high humidity, the condensate may be several litres per hour. This may give 
the impression that the heater is leaking, however this is a normal function of heat pumps. 
The heater will automatically activate reverse cycle or de-icing mode when required which 
also increases condensate discharge. This normally occurs at temperatures below 8 degC. 
The condensate water will discharge through the base of the heater. As an option a pipe  
can be connected to the drain on the base of the unit to direct condensate water to an  
appropriate location.
Typical Plumbing Layouts
Pool
Chlorinator
Heater
Filter
3 way 
valve
Slave Mode 
Electrical Control
Heater  
Bypass
Pool
Filter
Chlorinator
Heater
Electrical  
Control
Electrical  
Control
3 way 
valve
Heater  
Bypass
Pool
Chlorinator
Heater
JBox
Filter
Electrical  
Control
3 way 
valve
Heater  
Bypass
1. Slave Mode
2. Separate Systems
3. Evo JBox










