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CONNECTING SUPPL
CONNECTING SUPPL
CONNECTING SUPPL
CONNECTING SUPPL
CONNECTING SUPPLY
Y
Y
Y
Y AND RETURN PIPING
AND RETURN PIPING
AND RETURN PIPING
AND RETURN PIPING
AND RETURN PIPING
IMPORTANT:
Circulators in the following illustrations are mounted on the system supply
side, but mounting on the system return side is also acceptable practice.
1. Connect supply and return piping as suggested in figure 5, below. When the boiler is
used in connection with refrigerated systems:
A. The chilled medium MUST BE IN PARALLEL with the boiler.
B. Use appropriate valves to prevent the chilled medium from entering the heating boiler.
2. During the heating cycle open valves A and B, close valves C and D.
3. During heating cooling cycle open valves C and D, close valves A and B.
A. Maintain a minimum clearance of one inch to hot water pipes.
In air handling units where they may be exposed to refrigerated air circulation, the
boiler piping system MUST be supplied with flow control valves or other automatic means
to prevent gravity circulation of the boiler water during the cooling cycle.
4. Hot water boilers installed above radiation level must be provided with a low water
device either as part of the boiler or at the time of boiler installation.
5. When a boiler is connected to a heating system that utilizes multiple zoned circulators,
each circulator must be supplied with a flow control valve to prevent gravity circulation.
FIGURE 5
