
3YSTEM
2ETURN
#HECK
6ALVE
"LEND
0UMP
3YSTEM3UPPLY
0RESSURE2EDUCTION6ALVE
"ACKFLOW0REVENTER
3YSTEM#IRCULATOR
!MTROL
!IR%LIMINATOR
OR%QUAL
&ROM#ITY
7ATER3UPPLY
%XPANSION
4ANK
!IR3EPARATOR
&IGURE
!44%.4)/. (EATINGSYSTEMDESIGNANDBURNEROPER
ATIONMUSTINCORPORATEINTERLOCKTOPREVENTBURNER
FROMFIRINGWHENBOILERHASNOSYSTEMWATERFLOW
!
'0-"LEND0UMPSHOULDBEUSED
6ISITOURWEBSITEAT WWWLANAIRCOM
3ECTION4YPICAL"OILER0IPING
3YSTEM3UPPLY
3YSTEM2ETURN
0RESSURE2EDUCTION6ALVE
"ACKFLOW0REVENTER
3YSTEM#IRCULATOR
!MTROL
!IR%LIMINATOR
OR%QUAL
&ROM#ITY
7ATER3UPPLY
%XPANSION
4ANK
!IR3EPARATOR
#HECK
6ALVE
"LEND
0UMP
#HECK
6ALVE
"LEND
0UMP
v
-
A
X
v
-
X
A
./4%3
s3IZESECONDARY0UMP'0-ATGROSSBOILEROUTPUT
FORAv DROP
s7HENCALCULATINGPUMPHEAD THEMAXIMUM
BOILERRESISTANCEFORANYBOILERWILLNOTEXCEED
v IN7# OFHEAD
3INGLE"OILER0IPINGWITH"LEND0UMP
&IGURE"
3INGLEOR-ULTIPLE"OILER0IPINGFOR0RIMARY3ECONDARY0UMPING
-INIMUM2ETURN7ATER4EMPERATURE &
!