Specifications

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  ow can be
di 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  lled. Design piping to avoid high points where air can be trapped or install air bleeding
vents at these locations. Various vent  ttings are available such as vented brass elbows or baseboard tees. Vents
should be open during the  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  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 re ll the entire system should joints need to be resoldered or plumbing modi ed. Normally, isolation
pump  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  lling the appliance. Typically the existing boiler
system has a keep  ll connection already installed. The boiler should be  lled the  rst time according to the initial
 ll manual section. Ensure that you can adequately monitor system pressure while  lling. Ideally, system pressure
should be visible from the valve being used to  ll the system. Unless a back  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 e 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  tting at the end) should be added to the valve so that release
will safely discharge scalding water near the  oor.
DANGER
WARNING
INSTALLATION TIPS