Install Instructions
Installation
Instructions
RA2000 One Pipe Steam (1PS)
Thermostatic Radiator Valve
VISXA122 © Danfoss 10/07
Prior to Installation:
The operator with valve-mounted dial and sensor must be
mounted horizontally.
IMPORTANT
In one-pipe steam systems sufcient pitch is required to permit
condensate return. Condensate should not be trapped in the
valve or vent.
Boiler/Steam supply must be cycled by a reset control and must
not run at constant pressure (which would prevent air from
entering back into the system).
Make sure that free-standing radiators or cast iron convectors are
properly pitched and that hand valves are FULLY open.
To aid in preventing overheating of rooms that are temperature
satised, boiler steam pressure must be kept low, recommended
normally at or below 2 psig. Otherwise air will be compressed in
the radiator, allowing steam to enter when not required.