Lochinvar 800 - Manual (Page 40)

Installation & Operation Manual
40
EXPANSION
TANK
AIR SEPARATOR
PRESSURE REDUCING
VALVE
BACK FLOW
PREVENTER
BALL VALVE
(TYPICAL)
UNION (TYPICAL)
PRESSURE RELIEF
VALVE
FLOW CHECK
VALVE (TYPICAL)
INDIRECT DHW
TANK
BOILER 1
(LEADER)
TEMPERATURE /
PRESSURE GAUGE
PRESSURE GAUGE
DRAIN
DRAIN POINT
(TYPICAL)
BOILER CIRCULATOR
(TYPICAL)
ANTI-SCALD
MIXING VALVE
SYSTEM SUPPLY SENSOR
(WHEN USED)
SYSTEM CIRCULATOR
NO
T T
O
EX
CE
ED
4
PI
PE
DI
A
OR
MA
X.
OF
12
" A
PA
RT
BOILER 2
(MEMBER 1)
BOILER 3
(MEMBER 2)
BOILER 4
(MEMBER 3)
DOMESTIC
HOT WATER
CIRCULATOR
COLD WATER IN
HOT WATER OUT
MAKE UP WATER
Y-STRAINER
(TYPICAL)
(RECOMMENDED)
MAY SUBSTITUTE
LOW LOSS HEADER
FR
OM
SY
ST
EM
TO
SY
ST
EM
Figure 6-8 Multiple Boilers - Primary/Secondary Piping
Model
Number of Units
2 3 4 5 6 7 8
Manifold Pipe Sizes in Inches (mm)
399 2 1/2 (64) 3 (76) 3 1/2 (89) 4 (102) 4 (102) 5 (127) 6 (152)
500 3 (76) 3 1/2 (89) 4 (102) 5 (127) 5 (127) 6 (152) 6 (152)
600
3 1/2 (89) 4 (102) 5 (127) 5 (127) 6 (152) 6 (152) 8 (203)
700 3 1/2 (89) 5 (127) 5 (127) 6 (152) 6 (152) 8 (203) 8 (203)
800 4 (102) 5 (127) 5 (127) 6 (152) 8 (203) 8 (203) 8 (203)
NOTICE
System flow should always remain higher than the required flow for the boiler(s) when the boiler(s) is in
operation to prevent short cycling and high limit issues.
6
Hydronic piping
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
for all equipment and detailing required by local codes.
NOTICE