Pre-Installation Checklist - Amtrol Well-X-Trol Professional Serie Instrucciones De Instalación, Operación Y Mantenimiento

3. PRE-INSTALLATION CHECKLIST

IMPORTANT STEPS AND DECISIONS REQUIRED BEFORE INSTALLATION
❑
THIS PRODUCT MUST
MAINTAINED BY A LICENSED PROFESSIONAL. IN
ADDITION TO THE INSTRUCTIONS IN THIS MANUAL,
FOLLOW ALL APPLICABLE LOCAL AND STATE
CODES OR IN THE ABSENCE OF SUCH CODES, THE
CURRENT EDITIONS OF THE NATIONAL PLUMBING
CODE AND THE NATIONAL ELECTRIC CODE.
MAXIMUM WORKING PRESSURES
Every WELL-X-TROL is air tested to 150
psig, the maximum working pressure for the WELL-X-TROL line.
Should pressures exceed 150 psig, proper selection and sizing of
an A.S.M.E. constructed WELL-X-TROL should be made.
4. HOW YOUR WELL-X-TROL WORKS
OPERATING CHARACTERISTICS
The WELL-X-TROL principle employs a mechanical sealed-in
heavy duty diaphragm to allow an air cushion to be pre-pressurized
before leaving the factory.
Water is contained in a separate molded rigid polypropylene
liner that is supported by the outside steel shell and covered by
a diaphragm. This provides a completely non-corrosive water
reservoir, eliminating any contact of system water with ferrous
metal. The WELL-X-TROL is shipped with its total volume filled
with air pressured to a standard precharge. As water enters
the WELL-X-TROL, the diaphragm is flexed, compressing the
air cushion, reducing its volume by the same volume of water
that enters. As the volume of air decreases, the pressure in the
WELL-X-TROL increases, so that it always equals the pressure
exerted by the water. Since air pressure and water pressure are
always equal, the diaphragm is never under any strain. It merely
flexes or floats between the water and air. When properly sized,
the air cushion in the WELL-X-TROL will be of sufficient volume
at minimum pressure (pump cut-in) to allow a desired volume of
water to enter the WELL-X-TROL with the subsequent pressure
increase within the specified operating pressure range as set by
the pressure switch.
BE INSTALLED AND
❑
DRIP PAN AND DRAIN: To avoid leaking and/or property
damage, install with a drip pan connected to an adequate
working drain kept clear at all times.
RELIEF VALVE REQUIRED
A relief valve should be installed which is
set to open at excessive pressures (125 psig). This will protect
the WELL-X-TROL and other system components should the
pressure switch malfunction and fail to shut the pump off.
The relief valve should be installed at the connection of the
WELL-X-TROL to the system piping and have a discharge equal
to the pump's capacity at 125 psig.
NOTE: This is an example. Not all precharge pressure is 38 psi.
Not all system pressures shut pump off at 60 psi
38 PSIG
60
38
A
A. Factory installed precharged air cushion. Pump off.
B. When pump starts, water enters the reservoir. At 60 psig, system
is filled. Pump shuts off.
C. When water is demanded, pressure in the air chamber forces
water into the system. Pump stays off.
-4-
60 PSIG
55 PSIG
55
B C