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ZILMET USA
INSTRUCTIONS FOR INSTALLATION AND OPERATION OF ZILMET USA EXPANSION TANKS
The use of proper anti-scale and corrosion inhibitors additives is required in hydronic systems; when necessary, also the use of a proper
anti-freeze fluid (glycol) must be considered.
AFTER THE INSTALLATION OF THE TANK
1.
Maintenance: Pre-charge control and visual inspection every 6 months.
2.
After the installation of the tank and the re-start of the plant, check for leakage and remove all air from the system. Check to make sure that
the system pressure and temperature are within safe operating range. If necessary, remove system water to bring the system pressure within safe
limits and/or adjust the temperature control up to the desired ending temperature.
3.
Do not over-tighten the threaded connection.
4.
Ensure proper support, restraint and anchoring of the expansion tank to avoid displacement or rupture in the event of vibrations or earthquake.
The above installation instructions are intended as a reference and must be adapted by taking into account the
specifications and instructions of the plant at which the tank is installed, the system design, the operation requirements and
local codes and standards.
5.
MAINTENANCE
ONLY QUALIFIED AND LICENSED PERSONNEL MAY PERFORM SERVICE AND MAINTENANCE.
DO NOT ACCESS WHILE UNDER PRESSURE. DANGER OF SCALDING, BURSTING OR WATER DAMAGE.
BEFORE PERFORMING MAINTENANCE AND CONTROL OPERATIONS, THE SYSTEM (INCLUDING THE TANK) MUST BE
SHUT OFF, COOLED AND NOT PRESSURIZED, ALL OF THE ELECTRICAL PARTS MUST BE UNPLUGGED AND THE TANK
MUST BE COMPLETELY EMPTY.
1.
Unless otherwise stated, at least once every six months the expansion tank must be checked to verify that the pre-charge is within
the value indicated on the label (factory pre-charge or customer set pre-charge) with a tolerance of ± 20%.
2.
To lengthen the life of the expansion tank's external protection, periodically clean the external portions of the tank using warm water and soap.
3.
Inspect the tank visually for signs of damage / corrosion at least once every 6 months
4.
The expansion tank includes components which undergo stress. In the event such components deteriorate with time, the tank must be replaced.
5.
Use only original ZILMET spare parts.
Note: To ensure the proper functioning of the system, the expansion tank must be replaced in the event of excessive deterioration and, in any case,
no later than 5 years from the installation date.
Current copies of this manual can be viewed at www.zilmetusa.com
PROFESSIONAL INSTALLATION REQUIRED
400 Frenchtown Road - East Greenwich, RI 02818 – phone 401 884 4943
rev. Sep2020
page 4 / 7
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