General
Before removing the front cover, make sure the unit is mounted correctly with the
water fittings at the bottom.
Water in
Water out
Serial number
When correctly mounted, this “ Series Two” water
heating unit should look like the diagram to the
left. ANY other mounting configuration will
prevent the unit from operating properly.
UP
Remove the front cover and observe the
indicator light on the circuit board of each
module.
With the power switched
“ON”
to the unit, run
water through the unit by opening several faucets
supplied by the unit. If any indicator lights
illuminate, note their position and if the
illumination is steady or pulsing.
If there are no indicator lights illuminated, then:
If there are no indicator lights illuminated, measure the flow rate of water going through the unit.
The “
activating flow rate
” varies with each model. You must determine which “Series Two” model
you have. Look at the rating label, find the
order ref. number
and then (From the data) cross
reference the required flow rate to activate the unit.
Measuring Flow Rate:
1) “EFT” requires at least 0.9 gallons per minute to switch on.
Fill a 1-gallon “milk” container and, using only water from the hot water outlet, record the time
(In seconds) required to fill. To calculate the flow rate, divide the number of gallons the
container holds (in this case one gallon) by the time required to fill.
e.g. If it takes 87 seconds to fill the container then the flow rate would be
Flow Rate (gpm)=v/t x 60 = 1 gal./87 seconds x 60 seconds/1 minute=.69 GPM
If there is insufficient water flow to activate the unit, then you must provide more water to the
system by
opening the valves fully.
If there is sufficient water flow and still no indicator lights, then proceed to the next step.
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