I am a little suprised at the electrical layout. The manufacturer is suggesting three breakers to a single control panel. How do you effectively isolate the unit for service, normally there is a single point of isolation on the control panel such as a service switch on the front of it.
Also, from the drawing (page 13) it looks like the exposed L1/L2 terminals are right next to the inlet and outlets ports for the water piping. The drawings show wires running right past the mechanical piping within the control panel. Unusual to say the least that there seems to be no barrier between the sections.
