Girard tankless water heater
Having some issues with our Girard tankless water heater-model GSWH-1. The unit was installed by airstream adventures northwest, just over a year ago. It's been used... maybe twice. Airstream adventures northwest winterized the trailer and while getting the trailer ready for summer, I notice that all three water valves were turned off (see attached pics.) I've followed the instructions from the manufactures manual and watched the YouTube video. The instructions and video do not mention anything about these three valves. Needless to say... still without hot water.
I've tinkered with the valves, trying different positions, but perhaps not the correct ones. The unit is turned on and clicks when the hot water is running.
The LP is working, stove and oven work, refrigerator works on LP and the furnace is working.
Any suggestions would be appreciated.