Manual

Installation - Piping
• When the water supply pressure is higher than
70 psig, it is recommended to install a pressure
reducing valve on cold water supply line to
prevent water loss through T&P relief valve.
• If water heater will replace tankless coil in
boiler, disconnect piping to coil. Allow water
to drain from coil. Do not plug tankless coil.
Plugging tankless coil inlet and outlet will
result in severe personal injury, death, or
substantial property damage.
Thermostatic Mixing Valve
• It is recommended to install an optional mixing
valve on the domestic hot water outlet.
• Mixing valve should comply with ASSE 1017
Recirculation Piping
• T&P relief valve must be installed in run
(straight through leg) of tee located at domestic
hot water outlet of water heater.
• It is recommended that the recirculation dip tube
be installed in auxiliary connection using a close
nipple assembly as shown Fig. 3A, page 9. See
Chart 1 page 6 for diameter and length of dip
tube.
• A stainless steel or bronze circulator is recom-
mended
• Install automatic mixing valve either at the hot
water outlet of water heater or each hot water
faucet.
Multiple Water Heater Systems
• Parallel Pipe Recirculation Systems - Manifold
recirculation return to all water heaters.
• Series Piped Systems - Piped return to the lead-
ing (cold water inlet) water heater.
• Install automatic mixing valve either at the hot
water outlet of water heater or each hot water
faucet.
Failure to install automatic mixing valve
where recommended will result in severe
personal injury or death.
Boiler Piping
• If plastic pipe is used for boiler water piping, it
must have a maximum oxygen diffusion rate of
0.1 mg/liter-day for boiler and water heater
protection.
The Smart IDWH must be installed on a
closed type hydronic system. Failure to pro-
vide such a system will result in premature
failure of the outer tank and annulment of
warranty.
• Boiler water (including additives) must be
practically non-toxic, having toxicity rating or
class of 1, as listed in Clinical Toxicology of
Commercial Products.
If antifreeze is used in boiler system, local
codes may require a backflow preventer on
cold water supply line. Use antifreeze specifi-
cally intended for hydronic heating systems.
Inhibited propylene glycol is recommended at
a maximum 50/50 mixture.
Do not use automotive, ethylene glycol or
petroleum-based antifreeze. Do not use any
undiluted antifreeze. This can cause severe
personal injury, death or substantial property
damage.
DANGER
DANGER
DANGER
NOTICE
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