Other Water Heaters 4 Ways to Order
Installation and service must be performed by a qualified installer or service
Powerstream Models RP1 / RP2 / RP3 / RP7 / RP9 / RP12
Specifications & Troubleshooting
No Neon Light, No hot water
power and breaker at panel box are on.
||Water supply to unit must
be connected to proper fitting. Fitting closest to drain
||The high temperature
thermal cut-out has been triggered. Turn off power to
unit , remove front cover and reset thermal cut-out.
Location of thermal cut-out Thermal cut-out button
should push in and click, if it does not but rather
feels stiff and wobbly then it is not the problem.
||If the power and reset
are all right then the flow switch in the heater needs
to be inspected. See diagram below. The unit may be
mounted on wall in a different orientation then this
diagram but in this diagram the plastic (white or black)
plunger with screw on the stem needs to move laterally
to the left with sufficient water flow. Best to test by
leaving faucet open and controlling water flow to heater
with an inlet or outlet service valve directly before or
after the heater, this way the flow switch can be
observed. If water continues to flow at sink while
service valve is turned off then this plumbing error
will prevent the flow switch from pressurizing and needs
to be corrected. If plumbing is all right but the flow
switch doesn't move then either the flow is insufficient
or the flow switch is stuck from use or water quality.
Improve flow rate by cleaning filter screen and aerator
screen at sink, also remove aerator screen/restrictor at
sink to improve flow as a test. Location
of filter screen, marked filter plug.
|Water is too hot
water is preheated. This unit does not recognize
preheated water and is designed to be plumbed
with cold water.
will boost inlet water temperature as water
flows through it. To lower outlet temperature
first position the selector screw to the LO
setting. See diagram above with LO and HI
markings. Turn off power, remove front cover,
loosen selector screw and then slide all the way
to LO setting and retighten. Selector screw has
to be positioned to either end of slot, do not
position it midway. If temperatures are now too
cool then it is best to put screw back to HI
setting and follow step 2.
||The rate of water
flow will effect the outlet temperature, the
greater it is the less time the heater is
capable of heating as it passes through it.
Increase flow rate by cleaning filter screen,
aerator screen at sink and check to be sure
inlet and outlet service valves are fully open.
Removing restrictors at faucet will also
increase flow rate. Location
of filter screen, marked filter plug.
|Water is not hot enough
||Check selector screw's position. Turn
off power and remove front cover to check. If on LO then
loosen selector screw and slide all the way to the HI
setting, retighten selector screw.
||Lower the flow rate at the sink to
increase water temperature or adjust the outlet service
valve until the water come out of the tap at the
required temperature. Check possible temperature rise
per model and flow rate at Specification table above.
||Models RP1 / RP2 / RP7 / RP9 have two
venturis which are responsible for activating the heater
when water is turned on. These listed units come with a
3/4 gpm minimum flow rate venturi (activator), which
sits at the top of spring shown below. An alternate 1/2
gpm is also provided in these listed heaters, which sits
at the bottom of spring shown below, and can be swapped
to keep unit activated with a lower flow rate and thus
hotter water. The Model RP3 only has a 1/2 gpm venturi
and the Model RP12 only has a 1 gpm venturi. Remove
drain plug to access, see
|Water Temperatures Fluctuates
||While running hot water
observe the neon light on the front of unit. The light
should remain on during hot water use, if it goes out
then likely the water pressure is fluctuating, flow rate
is barely sufficient and causing the flow switch to
cycle on and off or the inlet water temperature is warm
or hot and the unit is cycling its low thermal cut-out
to prevent the unit from overheating. To improve flow
rate, check to be sure inlet and outlet service valves
are not tightened too much, clean inlet fitler screen
and faucet aerator screen. Removing restrictors at
faucet will also increase flow rate.
Location of filter screen, marked filter plug.
||If inlet water is warm because of
climate or season then it is recommended that the
selector screw in heater be positioned to the LO
setting. Turn off power, remove front cover and loosen
selector screw. Then slide screw to LO setting all the
way and retighten. NOTE: this heater is designed to be
plumbed with cold water and is not designed to be used
as a booster, do not plumb unit with preheated water.