CALEFFI 255 Series User manual

Installation
Install the solar expans on tank on a stable wall pos t on determ ned by the length of the flex ble
tub ng after connect ng one end to the pump stat on safety group connect on port 3/4" M thread
nsert ng flat gasket nto the 3/4" F expans on tank connect on nut. Mark the locat on and dr ll for the
mount ng screws 5/16" x 2" (8 mm x 50 mm) and secure the bracket to the wall. Insert the hexagonal
double check valve nto the bracket, F g. 1,
and t ghten nut (A) to the bracket, F g. 2.
Insert flat gasket nto the 3/4" F expans on
tank connect on nut and nsert flat gasket nto
3/4" F thread of double check valve and
thread on expans on tank connect to
expans on tank.
Expansion Tank Connection Kit
28120.02
www.caleffi.com
CALEFFI
Series 255
sta nless steel
- Wall bracket: steel
- Flat gaskets: Super nter te
- Double check valve: brass
Med um: water and glycol
Max mum percent of glycol: 50 %
Max mum work ng pressure: 150 ps (10 bar)
Max. work ng temperature of automat c double check valve: 230°F (110°C)
Bracket length: 10 nch (250 mm)
Flex ble tube length: 24 nch (610 mm)
Max mum expans on tank s ze for wall bracket s 7 gallons (25 l).
Connect ons: 3/4“ stra ght thread
1
Product Range
255007
255
Function
Expans on tank connect on k t s des gned
for use w th Caleff solar expans on tank
ser es 259, s zes 3 - 7 gallons.
The k t cons st ng of a flex ble sta nless steel
hose, a double automat c check valve, flat
gaskets, wall bracket and mount ng
hardware, helps reduce nstallat on t me and
prov des su table mount ng.
Technical Specifications
Mater
ials: - Flex ble tub ng:
Fig. 1 Fig. 2
Fig. 3
A
© Copyright 2018 Caleffi
These items are designed for use in closed systems. Do not use in plumbing applications. These
items do not meet the low-lead plumbing standards of U.S. and Canada.

Accessories
Series 259
Solar expans on tanks.
Heat res stant d aphragm compat ble w th glycol m xtures.
Max mum Work ng Pressure:
Temperature range:
Max. percentage of glycol:
Ava lable capac t es:
Tank:
D aphragm:
150 ps (10 bar)
15 - 250 deg F (-10 - 110°C)
50%
3, 5, 7, 9, 13 gallons (12, 18, 25, 35 and 50 l ter)
epoxy pa nted steel
EPDM
SAFETY INSTRUCTION
Th s safety alert symbol w ll be used n th s manual to draw attent on to safety related
nstruct ons. When used, the safety alert symbol means ATTENTION! BECOME ALERT!
YOUR SAFETY IS IN OL ED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY
RESULT IN A SAFETY HAZARD.
CAUTION: All work must be performed by qual f ed personnel tra ned n the proper
appl cat on, nstallat on, and ma ntenance of systems n accordance w th all
appl cable codes and ord nances.
CAUTION: If the expans on tank connect on k t s not nstalled, comm ss oned and
ma nta ned properly, accord ng to the nstruct ons conta ned n th s manual, t may not
operate correctly and may endanger the user.
CAUTION: Make sure that all the connect ng p pework s l qu d t ght.
Caleffi North America, Inc.
3883 West Milwaukee Road
Milwaukee, WI 53208
T: 414.238.2360 F: 414.238.2366
CAUTION: When mak ng the l qu d connect ons, make sure that connect ng
p pework s not mechan cally over-stressed. Over t me th s could cause breakages,
w th consequent l qu d losses wh ch, n turn, could cause harm to property
and/or people.
CAUTION: L qu d temperatures h gher than 100°F can be dangerous. Dur ng the
nstallat on, comm ss on ng and ma ntenance, take the necessary precaut ons to
ensure that such temperatures do not endanger people.
Leave this manual for the user.
7-25-18
WARNING: This product can expose you to chemicals including lead, which is
known to the State of California to cause cancer and birth defects or other
reproductive harm. For more information go to www.P65Warnings.ca.gov.