Install Instructions
Applications
31│Page
In orderto purgeair in water pipe s within a closed‐loop system, an air vent andair
separator should be installed in to 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 if the system incorporates an open‐loop
potablewatersystem.
Thewaterheatercanbeusedtosupplypotablewaterandspaceheatingandshallnot
beconnectedtoanyheatingsystemorcomponent(s)
previouslyusedwithnon‐potable
waterwhereanychemicalswereaddedtothewaterheatingappliances.
When the system requires water for space he ating at temperatures higher than
requiredforother uses,ameanssuchasamixingvalveshallbeinstalledtotemperthe
waterforthoseotheruses
inordertoreducescaldhazardpotential.
Watertemperatureover125F(52°C)cancausesevereburnsinstantlyordeathfrom
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
exchangercancauselow‐temperatureboiling,resultinginexcessivenoise anddamage
tothewaterheater.Consultwiththeglycolmakerforspecificationspriortouse.
APPLICATIONS
WARNING‐Space‐HeatingApplications
*Therecirculationpumpistobecontrolledby:
‐Dual‐setaquastat(recommendedw/timer)
OR
‐“PumpControlConnections”.Refertop24.
*Therecirculationpumpistoprovidenoless
than2GPMandnomorethan4GPMthrough
eachactivatedwaterheaterinthesystem.
‐Recirculation‐
Thisisaconceptdrawingonly.
Checkvalve
Checkvalve
Air
se
p
arator
Recirculation
p
um
p
Hot water outlet to fixtures
AirVent
Unions
Gassupply
Ballvalves
Expansiontank
Y‐Strainer
Coldwater
inlet
S