Weil-McLain PLUS LINE PLUS-E017-A/1206 Manual Do Utilizador

Part Number PLUS-E017-A/1206

2

   • Installation   • Start-Up   • Usage   • Maintenance   • Parts

B1

System water piping 

methods

 All piping methods shown in this manual

use primary/secondary connection to the

boiler loop. These designs ensure proper

flow  through  the

 Gas  boiler,  for

the most efficient and reliable operation

of the boiler and the heating system. For

other piping methods, consult your local

Weil-McLain  representative  or  refer  to

separate

Gas boiler piping guides.

Wall-mounted boilers — Piping can exit

bottom of boiler enclosure. See separate

wall-mounting instructions for details.

Expansion tank and make-up 

water

1.  Ensure expansion tank size will handle boiler and

system  water  volume  and  temperature.  Allow  

gallons for the boiler and its piping.

 Undersized expansion tanks cause system

water  to  be  lost  from  relief  valve  and

make-up water to be added through fill

valve.  Eventual  boiler  failure  can  result

due  to  excessive  make-up  water  addi-

tion.

2.  Tank must be located as shown in this supplement,

or following recognized design methods. See tank

manufacturer’s instructions for details.

.  Connect  the  expansion  tank  to  the  air  separator

only if the separator is on the suction side of the

system circulator. Always install the system fill con-

nection  at  the  same  point  as  the  expansion  tank

connection to the system.

.  The  piping  drawings  in  this  manual  show  only

diaphragm expansion tanks. Use only bladder-type

or diaphragm-type tanks with PLUS indirect water

heater applications.

.  Refer to the

Boiler Manual for other system

piping examples.

1.  Always install an automatic air vent on top of the air

separator to remove residual air from the system.

2.  See Figure 11 for correct location of the expansion

tank.

The  boiler-side  piping  must  be

equipped  with  a  diaphragm-  or

bladder-type expansion tank, NOT

a closed-type expansion tank. This

is  necessary  to  allow  venting  air

from the top of the indirect water

heater boiler-side.

Boiler circulator

The boiler circulator is shipped loose. It must be located

in either the return or supply piping, as shown in the

appropriate piping diagram in this supplement or the

Boiler Manual.

 DO NOT use the boiler circulator in any

location other than those shown in this

manual or the boiler manual. The boiler

circulator is selected to ensure adequate

flow through the

boiler. Failure to

comply  could  result  in  unreliable  per-

formance and nuisance shutdowns from

insufficient flow.

Sizing space heat system 

piping

1.  See Figures 12 and 1, pages 2 and 2, or the

Gas Boiler Manual for recommended piping. In all

diagrams, the space heating system is isolated from

the boiler loop by the primary/secondary connec-

tion.

2.  Size the piping and components in the space heating