F
d
b
b l
&
h
B l M
l
Finned copper tube gas boilers & water heaters – Boiler Manual
21
F
F
Figure 14
Typical Water Heating Piping (MW Models Only) (See Notes)
NOTES:
1. Optional cold water make up and recirculation line location.
2. When using intermittent pump and pump delay, locate remote aquastat well in lower 1/3 of tank. Install aquastat with heat sensing
compound.
3. Thermal expansion tank may be required, check local codes.
4. When using optional factory mounted pump, max pipe length 30’ total, 6-90
o
elbows, full pipe size.
5. CAUTION: MEASURE WATER HARDNESS AND pH AT JOB SITE.
6. The pH and water hardness must be measured before selecting heat exchanger and pump. Consult the Heat Exchanger Graph and
Pumping Performance Table before making selection.
7. Common piping must be sized for maximum combined heater fl ow.
8. Hot water tanks should be equipped with a combination temperature & pressure relief valve.
9. MA Code requires an 1/8” hole in check valve to compensate for thermal expansion.
Figure 15
Multiple Water Heating Piping (MW Models Only)
(See Notes)
Th ese drawings show sug-
gested piping confi guration
and valving. Check with
local codes and ordinances
for specifi c requirements.
