September
2012 Page
7
AVOIDING AIR LOCKS
All ROYALL Solid Fuel Boilers are designed not to exceed 30 psi, and will vent to the atmosphere if necessary.
Air trapped in the lines prevents circulation. Poor circulation is a common start up problem. Reduced fl ow can be
diffi
cult to detect because the pipes will feel hot. It is essential to provide a means for the air in the lines to escape
as the system is being fi lled. Design piping to avoid high points where air can be trapped or install air bleeding
vents at these locations. Various vent fi ttings are available such as vented brass elbows or baseboard tees. Vents
should be open during the fi ll process. Close the vents when bubble-free water runs out. The auto air vents on top
of the air scoop should remain open at all times.
Improper venting can lead to risk of generating high temperatures or steam which can destroy
hard and fl exible plastic piping due to increased temperature.
BALL VALVES
Install ball valves in the lines to isolate various components or sections. The ball valves will eliminate the need to
drain and refi ll the entire system should joints need to be resoldered or plumbing modifi ed. Normally, isolation
pump fl anges are supplied with the pump. These have built in ball valves that can be opened or closed, allowing
the pump to be replaced without draining the system. It is recommended that isolation ball valves be installed at
the boiler to assist in maintenance.
WATER SUPPLY
A tee and additional drain valve installed in the system will assist in fi lling the appliance. Typically the existing boiler
system has a keep fi ll connection already installed. The boiler should be fi lled the fi rst time according to the initial
fi ll manual section. Ensure that you can adequately monitor system pressure while fi lling. Ideally, system pressure
should be visible from the valve being used to fi ll the system. Unless a back fl ow preventer is used with a keep full
valve, you will need to disconnect the water supply. Normal routines should include inspecting the entire system
for leaks.
CORROSION INHIBITOR
It is recommended that the system water be tested and PH levels maintained between 8.5 & 11, Use of a corrosion
inhibitor is recommended. Treatment reduces premature failure due to corrosion and can help provide effi
cient
heat transfer by minimizing scale. Treatments should be designed for use in hydronic (boiler) systems. Individual
water conditions may require unique additives. Unit failure due to severe short term corrosion is not covered by
the warranty.
RELIEF VALVES
A pressure relief valve must be piped into the appliance such that it can not be isolated from the
appliance. Open plumbing (no fi tting at the end) should be added to the valve so that release
will safely discharge scalding water near the fl oor.
DANGER
WARNING
INSTALLATION TIPS