lp-181 Rev. 3.3.15
5
Figure 2 -
Specifications and Dimensions
When filling the storage tank, open a
hot water tap to release air in the tank
and piping. Failure to do so could lead
to improper operation and damage to
components.
B. Tankless Coil Connections
Refer to dimensional information
chart (Figure 2) for correct tankless coil
connection size. On the tank, tankless
inlet is to be connected to a bronze
or stainless steel circulator with the
arrow pointing away from the tank and
toward the tankless coil. This pipe will
also have a tee for the cold supply to
the tankless coil. (An optional check
valve may be installed between the cold
supply line and circulator to prevent
short circulating the tankless coil. This
may cause poor supply pressure or noisy
operation, depending on the type of
installation.)
On the tank, tankless outlet, use both
thread tape and pipe dope and connect
a
3/4
” NPT brass tee. On the run, install a
brass drain valve. In the branch, install a
3/4
” (minimum) tube adapter and connect
this to the hot tankless coil outlet on the
boiler.
See “Typical Installation”, Figure 3.
The use of heat, such as blow torches,
near the tank may cause distortion to
the high density polyethylene wrapper.
Such damage is NOT covered by
warranty. Exercise caution whenever
using heat sources near tank.
C. Hot Water Outlet
50 Gallon Storage Tanks:
Use both thread tape and pipe dope
to connect a
3/4
” NPT brass tee. In the run of the brass tee, install
a
3/4
” NPT brass T&P long element for hot water storage tanks,
as required by local codes, but not less than a valve certified for
meeting the requirements for relief valves for water heaters
(ANSI Z21.22 and CAN1-4.4) by a nationally recognized lab that
maintains periodic inspection of production of listed equipment.
The T&P valve must be plumbed down, so discharge will exit
at least 6” above the structural floor and not contact any live
electrical parts. In the bottom of the tee (branch) vertically down,
install a
3/4
” NPT x
3/4
” (minimum) tube adapter. Then install two
3/4
” (minimum) sweat street 90 degree elbows.
It may be recommended to use a back flow preventer - check
local codes. If a back flow preventer or no return valve is used,
a thermal expansion tank must be installed on the cold water
supply between the tank and valve. If the tank is replacing a
tankless coil, disconnect coil plumbing and use the cold water
inlet and hot water outlet pipes for the water heater.
80 and 119 Gallon Storage Tanks:
Use 2” NPT nominal pipe
size. A T&P port is included on 80 and 119 gallon tanks.
175 Gallon Storage Tanks:
Use 2
1/2
” NPT nominal pipe size. A
T&P port is included on 175 gallon tanks.
D. Temperature and Pressure Relief Valve
On all models, an appropriate temperature and pressure (T&P)
valve must be supplied and installed as detailed in the piping
diagrams in this installation manual.
Use both thread tape and pipe dope to install an NPT brass T&P
relief valve for hot water storage tanks, as required by local codes
but not less than valves certified as meeting the requirements
for relief valves for hot water heaters (ANSI Z21.22 and CAN
1-4.4) by a nationally recognized lab that maintains periodic
inspection of production listed equipment. Make sure the relief
Failure to properly install the storage
tank WILL VOID the warranty. It is also
necessary to use both thread tape and
pipe dope on all mechanical plumbing
connections.
Dielectric fittings must be used on
water connections.
