Component Information - Girard Products GSWH-1 Service Manual

COMPONENT INFORMATION

On/Off Switch
• Confirm power on incoming side of switch. No power check for blown fuse, broken or
disconnected wire, low battery Etc.
• Power coming into switch but not coming out, Replace Switch.
RELAY, with on/off switch turned on
• The relay has 4 posts, with wires attached.
Left---Red with jumper Red
Rear---Red
Right---Orange/Black
Front---Orange, power out of the relay
When the on/off switch is turned but water heater not running, 3 of the posts will have power.
Left, rear and right. The flow switch (discussed next) has two small black wires coming out of
it. One black wire goes to ground, the other attaches to the orange wire on the right side of the
relay. When a hot water faucet is opened the flow switch is activated. The black wire going
to the relay loses power and the relay closes. When this happen power flows from the relay
through the front orange wire and into the ECO. If this does not happen, confirm power drop at
black wire. If power does not drop out, suspect flow valve. If power does drop, with no power to
the orange wire, replace relay.
FLOW SWITCH
The flow switch is where the cold water comes into the water heater. As the water flows through
this device a poppet or small cylinder inside the flow switch will move up from the pressure of
the incoming water. A magnet in the poppet will energize, completing the circuit in the relay.
(Discussed above) On a rare occasion the poppet will stick in the flow valve. This is indicated,
when the hot water is turned on, nothing happens. Tap or hit the flow valve to loosen the
poppet. If this fixes the problem it should not have to be replaced. It should not happen again
unless the water heater has been ideal for a long period of time. Even rarer, I have seen times
when the water heater will not shut off when the water is shut off. Again taping the flow valve
will shut the W/H down. If either of these situations happen more than once, replace the flow
valve.
To test the flow valve. Using a multimeter.
Disconnect the small black wire from the relay. Using the meter, set for continuity, attach the
red lead to the wire from the relay and ground the black wire. There will be no continuity. Turn
on the hot water and you should get a reading. If not, replace the flow valve. Another test is to
by-pass the flow switch by disconnecting the black wire from the relay and putting ground on
the relay with another piece of wire.
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