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streams of water flow through the faucets, close them and
check all water connections for possible leaks.
4. NEVER OPERATE THE WATER HEATER
WITHOUT FIRST BEING CERTAIN THAT IT IS
FILLED WITH WATER.
INSTRUCTIONS FOR BOILER CONNECTIONS The Single-wall Indirect connection labeled “To Boiler Return”
should be piped to the boiler return piping as close to the boiler as
possible and especially after any flow control or check valves in the
space heating return piping. The use of a union and a shut-off valve
is recommended. The use of a flow control or check valve is
required to prevent back flow through the water heater during
operation of the space heating system. Pipe and fittings between
the boiler and Single-wall Indirect should be ¾” diameter or larger.
CONNECT WATER BOILER SUPPLY PIPING
1. For a space heating system that utilizes ZONE VALVES, refer
to Figure 2. The Single-wall Indirect connection labeled
“FROM BOILER SUPPLY” should be piped to the boiler
supply piping. Mount the circulator making sure the flow arrow
points toward the water heater. The use of shut-off valves and
unions are recommended for future service convenience. The
use of an air separator and vent is recommended to eliminate air
in the system. Pipe and fittings between the boiler and Single-
wall Indirect must be ¾” diameter or larger.
CAUTION
Maximum boiler water supply temperature to the indirect
heat exchanger must not exceed 240°F (116°C).
INTERNET VERSION FOR REFERENCE ONLY