Mechanical Installation; Pump Installation - LION LEB dc Series Installation Manual

(4) Units must be mounted straight as shown in Fig. 2 with the outlet at the top, and the
inlet on the bottom. See "Up Arrow" on label on side of boiler.
(5) The circulation pump should be connected to the outlet side of the boiler (see Fig. 3).

Mechanical Installation

(1) Refer to Fig. 3 for a typical system before installation.
(2) Packed with your boiler are the following.
a) Temperature & Pressure Gauge
b) Pressure Relief Valve
c) Air Vent
d) Necessary ttings.
(3) Mount unit as per instructions under "Location"
(4) Install Pressure Relief Valve and Pressure & Temperature Gauge. These must be
connected directly to the boiler as shown in Fig. 1
(5) A discharge line must be attached to the outlet of the pressure relief valve. The
discharge line will direct water or steam from the pressure relief valve should it open.
The discharge line must be as short as possible, not have any valves or restrictions, not
be smaller than the outlet of the pressure relief valve, slope downwards, and the end
must be open to the atmosphere. The discharge line should terminate at a drain 6 inches
above the oor level.
(6) Install inlet and outlet piping.
(7) An expansion tank must be installed (see Fig. 3) to allow for water expansion as the
system is heated.
Dissimilar Metals
Do not connect dissimilar metals to the inlet and outlet. Dielectric Unions should be used.
Another solution is to use brass or cast iron ttings between the boiler and any copper ttings
that you may be using. Failure to do so will result in galvanic corrosion and cause the tank to
fail over time.
This is not covered under the warranty.

Pump Installation

The circulation pump should be positioned as close to the boiler as possible, with the delivery
arranged to pump out of the tank outlet on the upper le side of the boiler (see Fig. 3)
The pump is powered by the boiler through terminals PL and PN located on the 120 volt
terminal block (lower right terminal block see Fig. 4). The pump starts when the thermostat
terminals on the control board are closed, and stops when these terminals are opened.
If desired, the pump may be operated continuously during the heating season. Should you
decide to wire the pump in this manner, it should be wired to the same supply circuit as the
boiler to prevent the pump from being turned o while the boiler is still powered.
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