PENSOTTI PNCC-32N, Instruction Manual

Page: 27 / 81

INSTALLATION INSTRUCTIONS
24
Central heating circuit
Pensotti requires the
installation of a pressure
reducing valve & backflow
preventor with all Solenne
Series boilers.
In order to prevent scaling or deposits in the primary heat exchanger
, the main supply water to the heating
circuit must be treated according to the requirements of local standards.
This treatment is indispensable in the case where the circuit is frequently topped-up or when the system is often
either partially or fully drained.
In order to safeguard all waterside components and ensure warranty coverage the supplied Fernox
Commissioning Kit MUST be used in its entirety.
Expansion Tank Capacity
This boiler is equiped with an internal heat circuit expansion tank. You must check the system water capacity to
determine if it is of adequate size for the heating system. An external expansion tank may be added if necessary.
Before filling the system the internal expansion tank pressure
must be checked and adjusted if necessary. The
pressure must match they system’s minimum cold water fill pressure as determined by the installer.
It is required that the air pressure in the expansion tank be checked on an annual basis.
Max. System Operating
Temperature (°F)
Maximum System Water
Content (Gals.)*
100 114
110 85
120 65
130 52
140 43
150 36
160 30
170 26
180 24
Internal Boiler Relief Valve
This boiler is equipmed with an intregal 30 psi relief valve. It is imperitive that this relief valve be piped out of the boiler
cabinet to a safe location as defined by local code.
Any water damage incurred to this boiler by the release of water from an improperly or nonexistent relief valve
drain pipe will NOT be covered under the warranty.