User Guide

40 Page
APPLICATIONS
-Space-heang applicaons-
-Recirculaon-
*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
Applicaons
Installaon Manual
Air vent


pump
Air
separator
S
Check valve
Check valve
Y-Strainer
Cold water inlet
Expansion tank
Gas supply
Ball valves
Unions
Hot water outlet Cold water inlet
Gas inlet
Pressure
relief valve
This is a concept drawing only.
 This water heater is suitable for combination water (potable) heating and
space heating and not suitable for space heating applications only.
 In order to purge air in water pipes within a closed-loop system, an air vent
and air separator should be installed in the system. Required circulation
flow rates are labeled next to each application diagram. These flow rate
requirements must be followed.
 Toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol
groups must not be introduced into the 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.
 Failure to observe these warnings could result in severe personal injury or
death.
WARNING