Maintenance & Service; Periodic Inspection; Water Chemistry - Hayward HP50951T Guide D'installation Et D'utilisation

51300002101 RevA
switch on the heater. In these cases the pump must be run at high speed to operate the heater. If the pump and piping arrangement
are such that the required minimum flow cannot be obtained, do not attempt to operate the heater. Correct the installation.
NOTICE:
Heater installation, checkout, and start-up should now be completed. BE SURE to leave this manual with the pool
owner.
MAINTENANCE & SERVICE
PERIODIC INSPECTION: The heater is designed and built for long performance life when installed and operated according to the
manufacturer's directions. Regular inspection by qualified service personnel is recommended to keep the heater working properly.
The following inspection points are suggested to help maximize heater life.
1. Periodically check the fan discharge area. The fan discharge must never be obstructed in any way and minimum clearances
must be observed. Remember that shrubs grow and in time may obstruct
2. Keep the entire pool heater area clean and free of all debris, corrosive materials, and other flammable vapors and liquids.
Remove any leaves or paper from around the heater.
3. Do not store chlorine, other pool chemicals, or other corrosives in the vicinity of the heater.
4. Do not use the heater if any part has been under water. Contact a qualified service technician to inspect the entire heater and
replace any part of the control system that was under water. If heater has been totally submerged in water it must be removed
and the entire heater must be replaced.
5. An inspection program is a good preventative maintenance measure. Keep this manual in a safe place for future reference for
yourself as well as for a service technician to consult when inspecting or servicing the heater. Additional inspection procedures
to be performed by a qualified service technician.

WATER CHEMISTRY:

WARNING:
WATER CHEMISTRY. Failure to maintain proper water chemistry may cause premature heat exchanger
damage or failure
The heat exchanger in your pool heater is made from the highest quality of materials. The titanium condenser is a premium material
and the processes used to manufacture the heat exchanger are state of the art in pool heater design and manufacture. However, it
remains vital that the heat exchanger be protected from damaging or corrosive chemicals, insufficient water flow or improperly
balanced water chemistry. Heat exchanger damage or failure resulting from improper flow, improperly balanced pool water or the
improper addition of sanitizer into the water is NOT covered under the terms of the warranty. The following factors are critical to
heat exchanger protection. Follow these guidelines to help prevent pre-mature damage or failure to your heater and heat
exchanger.
1. WATER FLOW THROUGH HEATER Water must be flowing through the heater at the minimum rated flow rate during operation.
Check that the pump is operating and the system is filled with water and purged of all air prior to starting the heater. The
minimum rated flow rates are listed in the specifications section. Some installations may require an adjustment to the water
pressure switch for proper low-flow protection. Test your system and if necessary, adjust the water pressure switch as described
in WATER TESTING SECTION OF MANUAL.
Recommended
Chemical
Chlorine 1 - 3 ppm
Bromine 2 - 4 ppm
pH
Total Alkalinity 80 - 120 ppm
Calcium
200 - 400 ppm
Hardness
Salt 2700 - 5000 ppm poor salt chlorinator performance
2. WATER CHEMISTRY The chemistry balance and mineral content of swimming pool and spa water changes rapidly due to the
addition of sanitizing chemicals, user loads, exposed rain, runoff and the amount of sun - to name a few. Improper chemistry
(See Table4) balance and mineral content can cause scaling and deposits to form on pool walls, in the filtration system, in the
heat exchanger tubes and additionally can promote corrosive action to all metals in the water path. Changing spa water regularly
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Table4: Water Chemistry
Effect of Low Levels
Level
hazy water, algae growth,
bacteria causing infections
corrosive to heat exchanger,
7.4 - 7.6
swimmer irritation
corrosive to heat exchanger,
large fluctuations in pH
corrosive to heat exchanger
USE ONLY GENUINE REPLACEMENT PARTS
Effect of High Levels
swimmer irritation, bleaching of
clothes/hair, corrosive to heat
exchanger
cloudy water, scaling of heat
exchanger, reduced sanitizer
effectiveness
scaling of heat exchanger
scaling of heat exchanger
corrosive to heat exchanger