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

28

Part Number PLUS-E017-A/1206

 Indirect-Fired Water Heaters – Series 3

Combined space heating/water 

heating applications

1.  Figure 1  shows  recommended  piping  between

 Gas

boiler and PLUS water heater. All show direct connection

of the water heater piping to the boiler because the boiler

circulator shuts down during water heater operation.

2.  Table , page 29, uses the recommended flow rates for the

PLUS water heater and minimum flow rates for the

Gas  boiler  to  provide  recommended  water  heater  piping

and circulator sizing. If using another circulator, verify it is

at least equal to the Taco selection given in Table , page 29.

For  general  information  on  head  loss  through  boiler  and

boiler-to-water heater piping, refer to the

Gas Boiler

Manual.

.

:

:

Select

Gas Boiler model and water heater model

in Table , page 29.

Step 2:  Read  recommended  minimum  flow  rate,  GPM,  in

table.

Step 3:  Read across to find recommended minimum pipe size

for boiler-to-water heater piping.

Step 4:  Read across to find recommended Taco circulator model.

Use a circulator with a pump curve at least equal to the
Taco circulator shown. See Figure 1, page 29 for pump
curves of typical Taco circulators.

Boiler-to-water heater piping — Combined 
space heating/water heating application

  3  Boiler relief valve (see Boiler Manual for piping details)

  4  Relief valve discharge piping (see Boiler Manual for details)

  5  Water heater circulator — must be at least equal in capacity to circulator 

recommended in Table 3, page 29

  6  Isolation valves

10  Flow/check valve (with weighted seat to prevent gravity circulation)

11  Purge/drain valves

Boiler-to-water heater piping —  
Dedicated water-heating only application

Dedicated water heating-only 

applications

1.  Figure 1  shows  recommended  piping  between

 Gas

Boiler and PLUS water heater for dedicated water-heating

only applications.

2.

:

Table , page 29, provides the recommended minimum pipe

size for boiler-to-water heater piping.

.

:

Use the circulator recommended in Table , page 29. Install

the circulator as shown in Figure 1.

.

:

:  Select

 Gas  Boiler  model  and  water  heater

model in Table , page 29.

:  Read flow rate expected using the circulator speci-

fied inthe last column.

:  Size connecting piping as listed under “Boiler pip-

ing” in the table.

  3  Boiler relief valve (see Boiler Manual for piping details)

  4  Relief valve discharge piping (see Boiler Manual for details)

  5  Water heater circulator — (see Table 4, page 29)

  8  Expansion tank (diaphragm or bladder type)

  6  Isolation valves

10  Flow/check valve (with weighted seat)

11  Purge/drain valve

20  Fill line to fill valve (item 23)

B2