172-65702M-04 (SQ-C01) 10 Dec 2020
16
Piping Work
For applications such as handwashing in which hot water directly
touches hands, when using the one-pass method, make sure to install a
thermostatic mixing value at the outlet. Failure to observe this precaution
may result in burns, as water at a temperature higher than the set
temperature may flow due to load fluctuations.
WARNING
Install properly and DO NOT use the unit outside the recommended
operating pressure, temperature and other specification ranges.
Improper use may result in such hazards as damage to the unit or
malfunctions which may lead to serious accidents. Local regulations
may restrict the use of the unit to below the conditions quoted.
CAUTION
To use the unit safely and properly, read this instruction manual carefully
to carry out the specified work. Installation, moving and incidental work
of the unit requires professional qualifications and skills. The work should
be carried out by a qualified personnel. Once installation is complete,
make sure that the work is carried out based on the instruction manual.
Work carried out improperly may lead to accidents or unit malfunction.
CAUTION
Do not use well water or water from a hot spring. Depending on the
water quality, foreign matter may adhere to, or corrosion may occur in,
the unit piping, resulting in water leaks. In this case, there will be a
charge for repair work even during the warranty period.
CAUTION
Do not use excessive force when connecting threaded pipes to the unit.
Over-tightening may cause breakage leading to fluid discharge, which
may cause burns or other injury.
CAUTION
The unit consists of steam-using equipment and piping. Proper insulation
should be installed to avoid burns or heat loss. Steam piping is hot, and
even water piping may reach temperatures up to 65 °C. Insulate piping,
as touching piping directly may result in burns.
CAUTION
The unit is not designed to withstand the surrounding piping and
equipment loads. Install the necessary piping or equipment supports
prior to unit installation, to prevent any load being applied to the unit.
The impact of external force may damage the unit, leading to fluid
discharge, which may cause burns or other injury.
CAUTION
When all the piping work is completed based on the system flow
diagram, inspect once again that all the piping connections and
internal G threaded connectors are properly tightened, gaskets have
been installed and that no parts or connections are loose. Failure to do
so may result in burns or other injury from discharge of fluids.
CAUTION
Take measures to prevent people from coming into direct contact with
outlets of the unit. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
1. For piping
a) The pipe diameter should not be smaller than the diameter of the unit
connections.
b) For steam piping, make sure the piping is connected with a downward slope
on the downstream side.
c) The piping should be kept simple, with as few joints as possible in order to
avoid pressure loss.
d) Take measures for the location where air may accumulate, such as installing
an air vent valve, etc. so that air does not accumulate.
