10
4. Installation of Boiler Trim Components
(Continued....)
All piping must conform to state and local codes.
The supply and return for Optimajor boilers 2” NPT. Be sure to provide unions and
isolation valves at the manifold inlet and outlet of the boiler, so the boiler may be readily
isolated for service.
Each Optimajor boiler will come with a 4 port supply manifold. This manifold
is used to install the Tridicator, PRV, and Manual Reset LWC. The manifold is pictured
below.
Install the provided pressure relief valve vertically in the manifold. Pipe the discharge
directly to a drain, if possible. If not, the discharge should be piped to the floor. In either
case, the discharge pipe should be of the same diameter as the outlet of the relief valve,
with no valves or obstructions to impede overflow from the boiler. Install the Tridicator
in another port so that it can easily be read. Lastly install the Manual Reset LWC in the
header so that it can easily be reached for service.
Install manual and/or automatic air venting devices at the high points in the
system to eliminate trapped air.
The weight of all piping should be supported by suitable hangars and floor stands,
not by the boiler.
It is recommended that the make-up water line have a backflow preventer and a
pressure-reducing valve to reduce line pressure to 10 to 15 psi installed adjacent to the
boiler.
NOTE: If the heating system is to be filled with antifreeze, use only formulations expressly
made for hydronic heating systems (such as propylene glycol). Do not use automotive
types of antifreeze (ethylene glycol). Use of antifreeze will alter system output and
characteristics. Consult factory rep's for details or assistance.
Clearance for hot water pipes are 1 inch to combustibles.
