Bradley Keltech SNA Serie Manual Del Usuario página 12

SNA-Series Tankless Heater
7
Perform Operational Test No. 1
Ensure the enclosure door is closed prior to
performing operation test.
A
Set the 3-pole switch or circuit breaker to the
ON Position .
Pull out the Emergency Stop Button . Heater
B
will automatically perform a 6 second
discharge from the TepidGuard overshoot
purge system . Wait for purge cycle to complete .
When flow rate reaches approximately 1 .5gpm
(5 .7lpm), the flow sensor recognizes this
condition and begins the heating process .
When the flow sensor activates:
• Green bank energized lights illuminate on the
C front bezel verifying power supply connection to
the heating elements via the solid-state relays .
• Element load lights may be solid or flash
in unison as heating elements modulate
depending on the hot water demand .
• Digital temperature controller shows water
temperature . Additional programming is
not necessary .
If the water flow exceeds maximum heating capacity of the heater, the temperature of water at the
outlet may be lower than the temperature selected on the controller. See below to determine maximum
temperature rise capabilities.
12 6/10/2016
Heaters installed in pump-and-well supplied
water systems may require an operating
pressure adjustment to a differential pressure
of approximately 10 psi. For example, if the
high limit pressure is 40 psi, adjust the low
limit pressure to 30 psi with the pressure
switch located on the supply pump.
Located on the panel are one (36-63kW)
or two (72kW-144kW) green ready lights.
When illuminated, the safety circuit is
engaged and ready for use.
Test water temperature and stability at
D
outlet by viewing the display . Controller
displays (in red) the temperature of water
exiting the heater .
Heater will not energize heating elements if the
inlet water temperature is equal to or greater than
the temperature set on the digital controller.
Deactivate the shower or eyewash . The
flow sensor will electrically open contacts
E
and remove power from the elements and
controller so that the display is blank and
bank lights are off . Power light stays on .
Bradley • 215-1815 Rev. E; ECN 16-17-016
Installation