Weil-McLain EcoTec 110, Manual

Page: 52 / 156

Part number 550-100-260/0520
52
ECO
®
Tec
G
AS
-
FIRED WATER BOILER
–
80/110/150/199
B
OILER
M
ANUAL
Primary/Secondary System Piping
-
Single Boiler System
(continued)
System water piping methods
.EARBOILERPIPING
Connect boiler to system only as shown in Figure 60, page 50
and Figure 61, page 51. The primary/secondary piping shown
ensures the boiler loop will have sufficient flow.
"OILERCIRCULATOR
The boiler circulator is factory-installed in the boiler as
shown in this manual. The boiler circulator is selected to
ensure adequate flow through the boiler loop.
$/ ./4 relocate or use the boiler circulator
in any way other than the ones shown in this
manual.
Failure to comply could result in unreliable
performance and nuisance shut downs from
insufficient flow.
3YSTEMCIRCULATORSANDZONECIRCULATORS
Install a system circulator or zone circulators as shown in the
piping diagrams in the Primary/Secondary System Piping
section in this manual. These circulators must be supplied
by the installer.
3YSTEMORZONECIRCULATORSmOWRATES
Size circulators based on the flow rate required to achieve
the temperature change you needed. You can closely estimate
temperature rise (or drop) through a circuit by using the
following formula, where TD is temperature rise (or drop),
FLOW is flow rate (in gpm), and BTUH is the heat load for
the circuit:
&,/7 =
"45(
ˆnˆnˆnˆn
4$X
%XAMPLES :
1. Consider a system loop for a system with total heating
load equal to 210,000 Btuh. The desired temperature
drop through the system piping is 20°F. Then the
required flow rate is:
&,/7 = ˆnˆnˆnˆn
X
= GPM
3)-0,)&)%$
&OR—TEMPERATUREDROP&,/7-"(
3YSTEMORZONECIRCULATORHEADREQUIREMENT
1. The circulator must be capable of delivering the required
flow against the head loss that will occur in the piping.
2. Determine the pipe size needed and the resultant head
loss using accepted engineering methods.
&IGURE Easy Up Manifold and DHW Service Valves
options
1. The ECO Tec
Easy Up Manifold
comes as a separate kit.
See Miscellaneous service parts and kits section at the end
of this manual for ordering information.
2. See separate instructions for the ECO Tec Easy Up Manifold
Weil-McLain website for suggested guidelines to determine how
to use and setup.
1. The ECO Tec
DHW Service Valves
comes as a separate kit, as well.
See Miscellaneous service parts and kits section at the end
of this manual for ordering information.
2. See separate instructions for the ECO Tec DHW Service Valves
Weil-McLain website for suggested guidelines to determine how
to use and setup.