Girard Products GSWH-1 Service Manual page 9

Controlling the Hot Water Temperature
1. The dial makes adjustment to the water temperature very easily. Generally a dial
adjustment is all that is required. Turn the dial clockwise to increase the temperature and
counter-clockwise to reduce the temperature.
2. If additional adjustment is required, increase or decrease the flow of hot water. Increase the
flow to to reduce the temperature slow the flow to increase the temperature.
3. If the water is too hot after making the adjustments mentioned above, you may add a small
amount of cold water to reduce the temperature.
One of the most common complaints is that the water temperature cycles between hot and cold.
The ECO safety switch is designed to OPEN at 131°. When this occurs, the burners will shut
off for a short time until the ECO closes or resets itself, turning the burners back on. There are
several reasons when this may occur:
1. The dial is set too high for the incoming water temperature. Turn dial down.
2. Water lines have not been purged, or completely purged. Purge entire RV again, following
the information discussed above.
3. Incoming water flow very low. The water heater should have at least 1 GPM for proper
operation. Test GPM by setting a 1 gallon container at one of the hot water faucets. If the
container fills in 1 minute, there is at least 1 GPM. If it does not fill, there is less than 1
GPM. If the problem of water flow cannot be resolved, place water in the fresh water tank
and operate and operate off of the pump.
If the customer has attached a flow restrictor, remove water restrictor from incoming water hose.
If a water filter is in use, be sure that the filter media is not reducing flow because it's to dirty.
Girard does not require a By-Pass during the installation. If this is a replacement water heater, or
if the OEM installs a By-Pass, be sure the By-Pass is set for summer usage. We recommend that
the By-Pass stay in this position all year.
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