10
PN 240013666 REV. A [06/30/2022]
Typical Layouts for Hot Water Heating Systems
Figure 5 - Typical Layouts for Modular Gas Fired Systems - Up to 4 Boilers Parallel Piping
BOILER
#1
BOILER
#2
BOILER
#3
BOILER
#4
UP TO MAX. (INLINE)
OF 163"
TO FLOOR
DRAIN
(TYP)
(1 1/4")
(1 1/4")
SYSTEM
RETURN
UP TO 4 BOILERS
(B HEADER)
SYSTEM
SUPPLY
2
T
SYSTEM
TEMPERATURE
SENSOR
4
L
T1
HIGH
LIMIT
5
*
(B HEADER)
3
LEGEND
-
Locate temperature sensor within 3 to 5 feet after supply header�
-
Maximum overall length is based on using (4) boilers having largest
footprint and 24” minimum service clearance between units�
4
-
Low Water Cutoff Shall be mounted above the supply fitting of the
boilers�
5 -
CSD-1 High Limit Shall be within 1’ (1 foot) of nearest boiler�
3
2
Note:
• Modules may be placed back to back to save space�
•
Refer to figure 3 for header size.
*
For sizing system or boiler circulators, apply 10 GPM per 100,000 BTU (net) output�
