Truefire
Truefire
I am trying to locate a cost effective means of providing switching of voltage to my onboard shower in my slide in camper. I have a Marey 120v point of use, water heater showerhead that draws 25amps. My water pump is a 12VDC Flojet centrifugal pump that draws approx. 8 amps.
I would like to mount a sealed, waterproof fingertip easy-touchpad (DC) inside the shower area which would draw minimal current using the 12VDC. This touchpad would activate the contact closure for a 12vdc contact to operate the water pump.
The Marey showerhead has to have water inside of its heating unit I would suppose prior to turning on any power. Believe it or not these units are used extensively in Puerto Rico within residential settings. These type shower heads have an enclosed element that would need to be encased about with water void of any air pockets. So, i need to send some water through the head first to pump out the air in the line. I want to have the easytouch switch in the shower due to its minimal amp draw and sealed factors.
I would want the waterpump to come on for just about 2-3 seconds prior to the showerhead point of use heater. Long enough to ensure that water has fully reached the shower head and the head has been purged of any air. Then the 120v, 25 amp circuit to be energized.
I had thought of installing a touch pad to activate a 12v normally open coil, which would activate a time delay relay, which in turn after 3 sec. would feed the closure contact for a 30A, 120V rated coil. Herein is part of my dilemma, i am having difficulty locating any the of the typical coils which could be used with your typical NA, AC line voltages which would accept 12VDC as the relay control voltage. There are plenty with the 24VAC, control voltage which are used extensively for heating and air, just not sure what keyword combinations to search for to locate this type online.
I have thought of using some of the central HVAC relays that have a built in time delay. The first Normally Open contact closes first to run squirrel cage fans then after a short set time the larger ampacity rated contacts are closed which serve to power some furnace or auxiliary heat strips. I suppose it could be used in the capacity that I desire, but then again if I were to go this route, not sure how to locate the appropriate one with the 2-4 second delay. I would assume there are not any perhaps with such short time delay. They more than likely are set to run longer prior to engagement of secondary contacts. Not sure?
I know exactly what I want and need, just not quite sure how to find the items online. Manuf. terms and details can be different than searching 'keywords'.
needing some ideas, possible suggestions.
Thanks, Chris
I would like to mount a sealed, waterproof fingertip easy-touchpad (DC) inside the shower area which would draw minimal current using the 12VDC. This touchpad would activate the contact closure for a 12vdc contact to operate the water pump.
The Marey showerhead has to have water inside of its heating unit I would suppose prior to turning on any power. Believe it or not these units are used extensively in Puerto Rico within residential settings. These type shower heads have an enclosed element that would need to be encased about with water void of any air pockets. So, i need to send some water through the head first to pump out the air in the line. I want to have the easytouch switch in the shower due to its minimal amp draw and sealed factors.
I would want the waterpump to come on for just about 2-3 seconds prior to the showerhead point of use heater. Long enough to ensure that water has fully reached the shower head and the head has been purged of any air. Then the 120v, 25 amp circuit to be energized.
I had thought of installing a touch pad to activate a 12v normally open coil, which would activate a time delay relay, which in turn after 3 sec. would feed the closure contact for a 30A, 120V rated coil. Herein is part of my dilemma, i am having difficulty locating any the of the typical coils which could be used with your typical NA, AC line voltages which would accept 12VDC as the relay control voltage. There are plenty with the 24VAC, control voltage which are used extensively for heating and air, just not sure what keyword combinations to search for to locate this type online.
I have thought of using some of the central HVAC relays that have a built in time delay. The first Normally Open contact closes first to run squirrel cage fans then after a short set time the larger ampacity rated contacts are closed which serve to power some furnace or auxiliary heat strips. I suppose it could be used in the capacity that I desire, but then again if I were to go this route, not sure how to locate the appropriate one with the 2-4 second delay. I would assume there are not any perhaps with such short time delay. They more than likely are set to run longer prior to engagement of secondary contacts. Not sure?
I know exactly what I want and need, just not quite sure how to find the items online. Manuf. terms and details can be different than searching 'keywords'.
needing some ideas, possible suggestions.
Thanks, Chris
Last edited:
