21
Finned copper tube gas boilers & water heaters – Boiler manual
FTXLF-IOM-HN-1-110308 Copyright 2008 Mestek, Inc.
Typical Water Heating Piping (MW Models Only) (See Notes)
Figure 14
NOTES:
Optional cold water make up and recirculation line location.
1.
When using intermittent pump and pump delay, locate remote aquastat well in lower 1/3 of tank. Install aquastat with heat sensing com-
2.
pound.
Thermal expansion tank may be required, check local codes.
3.
When using optional factory mounted pump, max pipe length 30’ total, 6-90
4.
o
elbows, full pipe size.
CAuTION: MEASuRE WATER HARDNESS AND pH AT JOB SITE.
5.
The pH and water hardness must be measured before selecting heat exchanger and pump. Consult the Heat Exchanger Graph and
6.
Pumping Performance Table before making selection.
Common piping must be sized for maximum combined heater flow.
7.
Hot water tanks should be equipped with a combination temperature & pressure relief valve.
8.
MA Code requires an 1/8” hole in check valve to compensate for thermal expansion.
9.
Multiple Water Heating Piping (MW Models Only)
Figure 15
(See Notes)
These drawings show sug-
gested piping configuration
and valving. Check with
local codes and ordinances
for specific requirements.
