16
16
5) Piping with a Chiller - If the boiler is used in conjunction with a chiller, pipe the boiler and chiller in parallel as shown in
Figure 15. Use isolation valves to prevent chilled water from entering the boiler.
6) Air Handlers - Where the boiler is connected to air handlers through which refrigerated air passes, use flow control valves
in the boiler piping or other automatic means to prevent gravity circulation during the cooling cycle.
7) Gravity Hot Water Systems - The CWI is suitable for installation in a gravity hot water system. Figure 16 shows piping
for a gravity hot water boiler. The circulator, 1-1/2” x 2” bushings, and 1-1/2” piping are removed and the system piping is
run directly to the 2” supply and return tappings on the boiler. If isolation valves are installed, they should be gate valves
or “full port” ball valves.
If it is desired to convert the gravity system to forced hot water, the factory supplied circulator and piping are used as is.
A gravity hot water system is a “large water volume system” (see (2) above) and should be piped with a bypass as shown
in Figure 13. Many gravity hot water systems have balancing orifice installed in the radiators. These orifice may need to
be removed to obtain proper heat distribution when the system is converted to forced hot water.
FIGURE 13: BOILER BYPASS PIPING
Summary of Contents for CWI103
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Page 17: ...15 15 FIGURE 12 INDIRECT WATER HEATER BOILER SIDE PIPING FIGURE 11 STANDARD BOILER PIPING ...
Page 34: ...32 32 Notes ...
Page 41: ...39 39 Notes ...
Page 43: ...41 41 ...
Page 45: ...43 43 ...
Page 47: ...45 45 ...
Page 49: ...47 47 FIGURE A1 BASE HEAT EXCHANGER FLUE COLLECTOR ASSEMBLY ...
Page 51: ...49 49 FIGURE A2 JACKET INSTALLATION ...
Page 53: ...51 51 FIGURE A3 TAPPING LOCATIONS SEE TEXT FOR TAPPING USES ...
Page 54: ...52 52 Notes ...
Page 55: ...53 53 Notes ...