Davey QX350P15 (15A) Xcelsior Spa Pool System User Manual
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P/N Q916962-1
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Your Davey Xcelsior Spa Pool System
Congratulations on your purchase of a quality product from the Davey range of Pool and Spa 
Equipment. You are assured of many years of reliable and efficient performance from your 
Davey product backed by Davey’s two year guarantee.
The Davey Xcelsior Spa Pool System has been specially designed to offer optimum 
performance and ample jet pressure in spa pools. It incorporates a thermostatically controlled 
heater element that ensures that the spa pool temperature set by the user is maintained with 
digital accuracy. It should not be used for any other purpose without first consulting your Davey 
Dealer or Davey Customer Service Centre.
The Xcelsior spa pool system is designed for use in spa pools only and is suitable for use in 
both chlorine and salt water spa pools. For models designed for spa bath applications, please 
consult your Davey Customer Service Centre or authorised Davey Water Products Dealer.
At Davey we design and build our own electric motors especially for our pumps. The matched 
motor and pump are designed to provide quiet operation while delivering optimum water flow. 
Davey’s totally enclosed motor incorporates “auto-start” overload protection with a built-in 
automatic thermostat designed to protect the motor from overheating. The excess heat from 
the motor is captured by the water, for a more energy efficient spa experience. 
Operating Instructions
AUTO LED - The orange Auto indicator light will appear on the touch pad whenever 
the system is in full automatic control mode. In this mode the system automatically 
activates the pump and heater to filter the water and maintain the set water 
temperature. If this light is flashing the water sensor is not detecting any water.
PUMP LED - The green Pump indicator light will appear on the touch pad whenever 
the pump is running, in both auto and manual modes. 
 
HEATER LED - The red Heater indicator light will appear on the touch pad whenever 
the heater element is on, in both auto and manual modes. For safety the heater is 
always automatically controlled. Usually switching on the Jet 2 accessory will cause the 
heater to switch off (load shedding). This is in order to keep the total power load to a 
safe level. If this light is flashing the system has detected an error.
JET 2 LED
The Jet 2 indicator LED will appear on the touch pad whenever the Jet 2 output is 
turned on. Note: If the spa does not have a Jet 2 load connected the LED will not 
operate.
Pump on/off
Optional pump or
blower on/off
Single press to
activate lights &
scroll sequences
Hold to scroll
temperature
up/down
LED indicator lights
Display
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Error 6
This error indicates that the safety over temperature cut out on the pump has operated. 
This is not necessarily a problem with the Xcelsior pump. It may have occurred from an air 
lock in the pump or high temperatures during shipping. This cut out can only be reset once 
the pump has cooled. The unit must then be manually reset by pushing the UP, DOWN and 
JET1 buttons simultaneously, before it will resume operation. Note: It is possible to reset the 
safety electromechanical latching cutout when the pump has cooled, without resuming normal 
operation, by pushing the Down button only. This may be useful for fault diagnosis.
Error 7
This error indicates a possible issue with the heater control relay inside the unit. Try to reset 
the spa. If there is still a problem then contact your spa pool supplier.
Error 8
This error indicates a problem with the digital temperature sensor in the pump front. This may 
be caused by the sensor becoming disconnected or by damage to the sensor or its cable. Try 
to reset the spa. If there is still a problem then contact your spa pool supplier.
Error 9
This error indicates a problem with the heater control circuitry inside the unit. Try to reset the 
spa. If there is still a problem then contact your spa pool supplier.
Spa Water Treatment
Recommended Chemical Values
pH.................................. 7.4 - 7.6
Total alkalinity ................ 100 - 120 PPM ( Parts Per Million )
Chlorine......................... 1.5 - 3.0 PPM 
It is important to maintain your spa water chemistry to the above values to ensure a healthy 
experience both for you as bathers and for your spa pool equipment.
PH
This is a measure of how acid or alkaline the spa water is (below 7.0 is acid, above 7.0 is 
alkaline). Low pH will cause corrosion of any metalwork in the water (element, thermostat 
pockets). High pH will cause scale formation and cloudy water.
Total Alkalinity
This is a measure of how resistant your spa water is to change of pH. A low TA (0 - 80 ppm) will 
allow the pH to fluctuate rapidly normally to the acid end and will make it very hard to correct 
the pH back to the ideal range.
Chlorine
Levels of sanitiser are important to prevent the build up of bacteria, and algae in the pool water. 
Chlorine is not the only sanitiser available to do this. Other sanitisers are Bromine, Ozone.
Damage to the element, thermostat pockets and associated metalwork due to the poor 
maintenance of water chemistry is not covered by warranty.
