400 Frenchtown Road - East Greenwich, RI 02818 – phone 401 884 4943
INSTRUCTIONS FOR INSTALLATION AND OPERATION OF ZILMET USA EXPANSION TANKS
PROFESSIONAL INSTALLATION REQUIRED
rev. Sep2020
page 1 / 7
PLEASE, PASS THESE INSTRUCTIONS ON TO THE PERSONNEL IN CHARGE OF INSTALLATION, OPERATION AND SERVICE. ALL IN-
STRUCTIONS MUST BE CAREFULLY READ AND FULLY UNDERSTOOD BEFORE INSTALLING THIS EXPANSION TANK. AFTER THE IN-
STALLATION, THESE INSTRUCTIONS MUST BE KEPT IN AN EASILY ACCESSIBLE PLACE FOR FUTURE REFERENCE.
THIS IS A SAFETY SYMBOL AND IS USED FOR WARNINGS. WHEN YOU SEE THIS SYMBOL, PAY PARTICULAR ATTENTION
TO THE WARNING DESCRIBING THE DANGER, HOW TO AVOID THE DANGER AND THE CONSEQUENCES OF NOT
AVOIDING THE DANGER.
TO ENSURE SAFE USE AND PROPER CARE OF THIS PRODUCT, FOLLOW THE PRODUCT INSTALLATION, OPERATING AND
MAINTENANCE INSTRUCTIONS CAREFULLY. FAILURE TO DO SO WILL VOID THE PRODUCT WARRANTY AND MAY RESULT
IN SERIOUS PERSONAL INJURY OR DEATH AND/OR PROPERTY DAMAGE.
BEFORE THE INSTALLATION, IT IS MANDATORY THAT YOU CALCULATE AND CHOOSE THE CORRECT TYPE OF VESSEL
BASED ON SYSTEM DESIGN, SPECIFICATIONS, INSTRUCTIONS AND OPERATION REQUIREMENTS. ONLY QUALIFIED AND
LICENSED TECHNICIANS MAY PERFORM THE CALCULATION AND THE CHOICE OF THE VESSEL IN ACCORDANCE WITH
CURRENT LOCAL, STATE AND NATIONAL CODES AND STANDARDS. ONLY QUALIFIED AND LICENSED PERSONNEL MAY
INSTALL, OPERATE AND SERVICE THIS EQUIPMENT IN ACCORDANCE WITH SYSTEM DESIGN, SPECIFICATIONS AND IN-
STRUCTIONS, OPERATION REQUIREMENTS AND CURRENT LOCAL, STATE AND NATIONAL EDITIONS OF THERMAL,
PLUMBING, AND ELECTRICAL CODES AND STANDARDS. MOREOVER, ALL LOCAL SAFETY, OCCUPATIONAL, HEALTH EN-
VIRONMENTAL AND ANY OTHER APPLICABLE CODES AND STANDARDS MUST BE FOLLOWED.
1.
DESCRIPTIONS AND USE
The Zilmet pre-pressurized expansion vessels are designed for the following purposes:
P
URPOSE
T
YPE OF WATER
MEMBRANE TYPE
S
YSTEM
TANK
MODEL
·
Hydronic water
expansion
NON-POTABLE WATER
These tanks
cannot
be
used for the production of
potable (drinking) water.
Fixed diaphragm
expansion tanks
Closed hydronic heating sys-
tems (hydronic systems) and
refrigerating systems
; Closed
hydronic solar systems
•
CAL PRO - ZHT
•
ZILMET FLATS - ZFT
•
SOLAR PLUS - ZSP
•
Zilmet
expansion
tanks incorporate a flexible butyl membrane to keep the system water or fluid from contacting the sealed-in air cushion in the tank.
•
CalPro (ZHT), Zilmet Flats (ZFT), and Solar Plus (ZSP) tanks are designed for closed systems and therefore do not have an internal liner as part of
the water reservoir. Water is in contact the the tank steel dome.
•
Easy Pro ZEP and ZHP tanks are designed for potable water and therefore have an internal liner to protect the water dome steel. These tanks are
NSF61 and UPC certified.
•
Zilmet tanks comply with low lead plumbing law.
WARNING: FAILURE TO CHOOSE THE CORRECT TANK AND PERFORM PROPER INSTALLATION CAN LEAD TO
MALFUNCTION, CONTAMINATION, AND VOIDANCE OF THE WARRANTY.
2.
TECHNICAL CHARACTERISTICS
WARNING: The values of the maximum working temperature and the maximum working pressure, shown in the label affixed
to the expansion tank and must be considered the maximum working parameters for the expansion tanks.
DO NOT INSTALL OR OPERATE THE SYSTEM AT SUSTAINED OR INSTANTANEOUS PRESSURE AND/OR AT TEMPERATURES
EXCEEDING THE LIMITS ON THE LABEL AFFIXED TO THE
EXPANSION
TANK.
The technical characteristics of the expansion tank are reported on the identifying label affixed to each product, including product identification, tank
volume, maximum working pressure and temperature, pre-charge pressure (factory set or user set), production year, and serial number.
The label is
firmly affixed to the tank and must not be removed, tampered with, hidden, covered, or changed.
If the label on the ZILMET tank is missing or the technical characteristics on the ZILMET label are not legible, DO NOT INSTALL the expansion tank
and contact ZILMET immediately by phone at 401 884 4943 or by e-mail at [email protected].
Each tank comes with a factory precharge pressure that must be checked prior to installation. The
precharge pressure may not be
correct for the
installation. Measure and adjust the precharge
,
if necessary,
so it
is
equals the operating pressure of the system
.
If the system has been filled, the tank must be isolated from the system and the tank emptied before
charging. This ensures all
fluid
has exited the
bladder and proper
precharge pressure can be charged
.
C
heck the precharge using a
calibrated
pressure gauge at the charging valve and adjust as
required.
Check air valve for leakage.
Do not depend on
the valve cap to seal the leak.
After making
sure air
charge is correct, replace
air stem cap
.
The Zilmet Flats, ZFT, Tanks come standard with a welded mounting bracket and a ZFT-U Tank Union Connector with two way check valve. This
valve makes it easy to install, service, and maintain the Zilmet Flat ZFT tank.
·
Potable
water
thermal
expansion
POTABLE WATER
Fixed diaphragm
expansion tanks
Potable hot water systems
•
EASY PRO - ZEP &
ZHP
