The following installation manuals are available for the RHeco Natural Gas 50kW Modulating Unit Heater (ULSA050-EC-2):
ULSA EC - Installation Manual - June 2018
Where can I find the installation manual for a RHeco Natural Gas 50kW Modulating Unit Heater (ULSA050-EC-2)
Looking for the installation guide for your Reznor product? Have a look in here.