Install Instructions

Applications
31│Page



 In orderto purgeair in water pipe s within a closed‐loop system, an air vent andair
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
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 he ating 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
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‐temperatureboiling,resultinginexcessivenoise anddamage
tothewaterheater.Consultwiththeglycolmakerforspecificationspriortouse.
APPLICATIONS

WARNING‐Space‐HeatingApplications
*Therecirculationpumpistobecontrolledby:
‐Dual‐setaquastat(recommendedw/timer)
OR
‐“PumpControlConnections”.Refertop24.
*Therecirculationpumpistoprovidenoless
than2GPMandnomorethan4GPMthrough
eachactivatedwaterheaterinthesystem.
‐Recirculation‐
Thisisaconceptdrawingonly.
Checkvalve
Checkvalve
Air
se
p
arator
Recirculation
p
um
p

Hot water outlet to fixtures
AirVent
Unions
Gassupply
Ballvalves
Expansiontank
Y‐Strainer
Coldwater
inlet
S