29 Page
Installaon
Installaon Manual
• Inordertopurgeairinwaterpipeswithinaclosed-loopsystem,anairvent
and air separator should be installed in the system. Required circulation
flow ratesare labeled next to each applicationdiagram. These flow rate
requirementsmustbefollowed.
• Toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol
groups must not be introduced into the system if the system incorporates an
open-loop potable water system.
• The water heater can be used to supply potable water and space heating and
shall not be connected to any heating system 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 higher
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 125 °F (52 °C) can cause severe burns instantly or
death from scalding.
• 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-temperature boiling,
resulting in excessive noise and damage to the water heater. Consult with the
glycol maker for specifications prior to use.
WARNING
S
Air vent
Hotwateroutlettoxtures
Recirculaon
pump
Air
separator
Check valve
Check valve
Y-Strainer
Cold water inlet
Expansion tank
Gas supply
Ball valves
Unions
Hot water outlet
Cold water inlet
Gas inlet
APPLICATIONS
-Space-Heang Applicaons-
-Recirculaon-
*The recirculation pump is to be controlled by:
-Dual-set aquastat (recommended w/timer)
*The recirculation pump is to provide no less than 2 GPM (7.5 L/min) and no more than 4 GPM (15 L/min) through
each activated unit in the system.
This is a concept drawing only.
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