PB Heat DE User Manual download pdf (Page 12)

D. EXPANSION TANK

1. Consult the tank manufacturer’s instructions for

specific information relating to tank installation. Size

the expansion tank for the required system volume

and capacity. See Table 10.2 in Section 10 for boiler

water capacity.

2. Expansion tanks are available with built-in fill valves

and check valves for reducing supply water pressure

and maintaining minimum system pressure. Check

the design features of the tank and provide valves as

necessary.

Refer back to Figure 3.1 for typical expansion tank piping.

E. INDIRECT-FIRED WATER HEATER

If the boiler is to be used in conjunction with an indirect-

fired water heater, refer to Figure 3.7 for typical piping.

Follow the instructions provided by the water heater

manufacturer. Pipe the water heater as a separate zone.

F. FREEZE PROTECTION

For new or existing systems that must be freeze-

protected:

1. Glycol in hydronic applications is specially

formulated for this purpose. It includes inhibitors

which prevent the glycol from attacking metallic

system components. Make certain that the system

fluid is checked for the correct glycol concentration

and inhibitor level.

2. The antifreeze solution should be tested at least once

a year and as recommended by the antifreeze

manufacturer.

3. Antifreeze solutions expand more than water. For

example, a 50% by volume solution expands 4.8%

in volume for a temperature increase from 32°F

(0°C) to 180°F (82°C), while water expands 3% with

the same temperature rise. Allowance must be made

for this expansion in system design.

4. For more information, consult the PB Heat LLC

Water Installation Survey and the antifreeze

manufacturer.

Figure 3.7: Typical Piping with Indirect-Fired Water Heater

WATER PIPING AND CONTROLS

Use only inhibited propylene glycol solutions of up to

50% by volume with water. Ethylene glycol is toxic

and can attack gaskets and seals used in hydronic

systems.

WARNING

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 42 43

Comments to this Manuals

No comments

PB Heat DE User Manual Page 12

Comments to this Manuals

Related products and manuals for Water heaters & boilers PB Heat DE