Part 5, Start-up and operation, Part 5 – start-up and operation – HTP SuperStor Ultra Indirect Fired Water Heaters User Manual
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LP-83 Rev. 3.24.14
PART 5 – START-UP AND OPERATION
1. Fill the water heater by opening the cold water shut-off valve. Purge air from the system by opening a hot water outlet at a fixture in a
kitchen or bathroom. When water flows freely from the outlet, the system is purged.
2. Check the system for leaks.
Fix any leaks before continuing the installation. Any leaks can result in serious property damage and personal injury.
3. After ensuring there are no leaks within the system, flush the system to clear any
soldering residue. Many soldering fluxes contain Zinc Chloride, which can corrode
stainless steel.
Draw at least three times the volume of the water heater to properly flush the system.
4. Initiate a call for hot water. Ensure each zone valve or circulator operates only when
its thermostat calls for heat. Purge each zone of air to ensure proper operation.
5. Set the water heater to the desired temperature. Boiler high limit should be set at least
20
o
F higher than the heater temperature. Set the low limit of the boiler control at the
minimum setting
– this will call the burner on only to satisfy the tank control.
We recommend a water heater temperature setting of 120
o
F. However, a lower
temperature setting may be required to comply with local and state codes for normal
operation. The differential should be set at 10
o
to 15
o
F. You may prefer a setting of either
higher or lower water temperature. A mixing valve in conjunction with a high temperature
setting may be used for high demand applications (spas, hot tubs, whirlpools).
6. When the system is completely flushed, purged of air, and the temperature is set, turn
on the boiler. Observe operation. Ensure the boiler shuts down after the indirect water
heater set point is satisfied.
If draining of the heater is necessary, open the temperature and pressure valve or a
hot water tap to prevent vacuum buildup in the tank and piping.
Risk of scald injury increases as you increase water temperature.