Manifold Accessory for Residential Wall-Hung Firetube Boilers
The manifold return and supply connections will mate directly to the supply
and return connections on the bottom of
the boiler. Anti-seize / thread sealant is recommended on the connections.
Be sure to use the supplied gaskets in the return and supply unions.
The P2135900 manifold is designed to mate with a 1¼" heating system loop,
and the P2135800 manifold is designed to mate with a 1½" heating system
loop. If the system loop is a different size, use appropriate fittings to
adapt. This kit is equipped with a ¾" adapter for the pressure relief
valve that is shipped with the boiler, as shown in the drawing below. It
is strongly suggested that this location is used for the boiler's pressure
relief valve, but if the user chooses to put the pressure relief valve
elsewhere, this connection must be plugged.
To accommodate systems that use an indirect water heater, this manifold
is equipped with indirect water heater connections, as shown in the
drawing below. The manifold is shipped with these connections capped. The
connections must remain capped if not used. If an indirect water heater is
to be connected, remove the caps and connect to the indirect water heater
piping. It is important to note that when an indirect water heater is
connected to this manifold, the boiler must give domestic water priority
to the indirect water heater pump (not included with boiler or manifold
kit).
Ensure system water flow moves in the correct direction.
