John Wood Takagi - 910 - Manual (Page 31)

31
APPLICATIONS
Space Heating Applications
WARNING
Toxic chemicals used in boiler treat-
ments such as alcohol, glycerol and
glycol group must not be introduced
into the system when used for open
loop potable water and space heat-
ing.
The 910 can be used to supply pota-
ble water and space heating and shall
not be connected to any heating sys-
tem or component(s) previously used
with non-potable water where any
chemicals were added to the water
heating appliances.
When the system requires water for
space heating at temperatures high-
er than required for other uses, a
means such as a mixing valve shall
be installed to temper the water for
those other uses in order to reduce
scald hazard potential.
Water temperature over 52°C (125 °F)
can cause severe burns instantly or
death from scalds.
Chemicals such as diluted Glycol can
be used for radiant floor, Hydro/fan
coil air or Baseboard heating only.
The diluted solution of glycol must
contain between 25% and 55% of
Glycol. Be aware that in closed-loop
glycol systems, low pressure in the
heat exchanger can cause low-tem-
perature boiling, resulting in exces-
sive noise and damage to the water
heater. Consult with the glycol maker
for specifications prior to use. •
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