John Wood FlowTHRU Storage Tanks - Manual (Page 3)

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Thank you for purchasing this FlowThru ® storage tank.
Properly installed and maintained, it will provide years of
trouble free service.
The warranty on this storage tank is in effect only when the
tank is installed and operated in accordance with these
instructions. The manufacturer of this tank will not be liable
for any injury or property damage resulting from failure to
comply with these instructions.
IMPORTANT: Read and understand these instructions
before installing and operating your storage tank.
Description
The FlowThru ® series of storage tanks have been designed
to supply hot water for domestic use when combined with a
tankless coil boiler or instantaneous water heater (IWH).
Each tank is equipped with an adjustable thermostat, pre-
wired and ready for connection to a circulator pump (not
supplied). These tanks are not constructed to ASME
requirements and should not be used for such applications.
The FlowThru
® series of storage tanks has been optimized
to maximize hot water flow rate capabilities of an instanta-
neous water heater or tankless coil boiler. They provide a
faster recovery than regular electric or gas-fired tank type
water heaters of the same storage capacity. Always use a
mixing valve on the hot water outlet (not provided).
Relief Valve Requirements
For protection against excessive temperatures and pres-
sure, install temperature and pressure protective equipment
required by local codes, but no less than a combination
Temperature and Pressure (T&P) Relief Valve certified as
meeting the requirements for “Standard For Relief Valves
For Hot Water Supply Systems, ANSI Z21.22/CSA 4.4”.
The valve shall be marked with a maximum set pressure not
to exceed the maximum working pressure of the storage
tank. The T&P valve shall be rated for the BTU INPUT of the
entire system. This T&P valve may be in addition to any
T&P valve that is required on the boiler or instantaneous
water heater system. Install the valve into the opening pro-
vided on the storage tank, or other approved system loca-
tion. Provide tubing so that any discharge from the valve will
exit within 152mm (6 in.) above, or any distance below the
structural floor and cannot contact any live electrical part.
The end of the relief pipe opening should terminate near the
floor drain or other suitable location. Do not place a valve(s)
or any other blockage or restrictions between the tank and
the T&P valve.
Local Codes
The installation of this storage tank must be In accordance
with these Instructions and all applicable local codes.
Location
Locate the storage tank in a clean dry area close to the
water-heating source and preferably central to the piping
system. Adequate clearance for accessibility to permit main-
tenance and service must be provided. Water lines and the
storage tank should be protected from freezing tempera-
tures. Do not install the storage tank in outdoor unprotected
areas. It is necessary to have a floor drain nearby to permit
easy draining (see Figure 1).
Circulator Pump
A circulator pump is not supplied. Use only a bronze body
model rated for 110/120 volts, 60Hz. Install in accordance
with the pump manufacturer’s instructions using standard
plumbing practices. Size the circulator pump taking into
account the pressure loss through the tankless coil boiler or
instantaneous water heater as well as pressure losses
through the connecting pipes that are part of the circulating
loop.
WARNING
Excessive Weight Hazard
Use two or more people to move and install
storage tank. Failure to do so can result in
back or other injury.
IMPORTANT
This storage tank must be installed strictly in accordance
with the instructions enclosed, and local electrical, fuel
and building codes. It is possible that connections to the
tank, or the tank itself, may develop leaks. IT IS THERE-
FORE IMPERATIVE that the storage tank be installed so
that any leakage of the tank or related water piping is
directed to an adequate drain in such a manner that it can-
not damage the building, furniture, floor covering, adja-
cent areas, lower floors of the structure or other property
subject to water damage. This is particularly important if
the tank is installed in a multi-story building, on finished
flooring or carpeted surfaces. GSW WILL NOT ASSUME
ANY LIABILITY for damage caused by water leaking from
the storage tank, pressure relief valve, or related fittings.
Select a location as centralized within the piping system
as possible. In any location selected, it is recommended
that a suitable drain pan be installed under the storage
tank. This pan must limit the water level to a MAXIMUM
depth of 45mm (1 3/4 in.) and have a diameter that is a
minimum of 50mm (2 in.) greater than the diameter of the
storage tank. Suitable piping shall connect the drain pan
to a properly operating floor drain.
I) INTRODUCTION
II) SAFETY
III) INSTALLATION