8
3 feet (0.9m) above the point at which they exit
from the roof, it must also extend 2 feet (0.6m)
above the highest point within a 10 ft. (3m) radius.
limit connector pipe to 8 ft. or less, with no more
than two elbows. all horizontal sections should
have 1/4 in. rise per foot. The chimney must be
capable of providing a draft reading of at least .06
in. of water column. a barometric damper can be
installed to prevent excessive and erratic draft.
all connector pipe should be secured with sheet
metal screws at each joint.
Installation
Plumbing
The Harman Trident Boiler can be used as a
“Stand alone” boiler or as an add-on to an existing
hot water heating system.
The diagrams in this manual are meant to show
the necessary equipment and piping. Your system
may look very different. However, if congured
properly, the same results will be achieved.
Fig. 6 shows a typical plumbing diagram for tying
into an existing system. This method provides
water circulation between the two boilers with a
circulating pump. In this setup, the domestic water
coil in the existing boiler will be heated, making it
unnecessary to install a water coil in the Trident
Boiler.
Tying-in to an existing boiler must be done in the
return line between the circulator and the existing
boiler. Run a pipe from there to a small circulator,
and then into the 1-1/4 in. tting on the rear of
the Trident Boiler. next run a pipe from the 1-1/4
in. tting on the top of the Trident Boiler to a Tee
tting in the supply line of the existing boiler. This
Tee tting must be installed between the existing
boiler and the Flow Control Valve, as shown in
Fig. 6. an air valve should be installed on this line.

FIG.5

Air Valve

FIG.6

Notice:

The Aquastat controls supplied with the
Trident Boiler are designed only to maintain
water temperature within the boiler. The actual
heating system is controlled separately by
your thermostat(s) opening zone valves or
energizing circulation pump(s).
Do not attach a thermostat to the supplied
controls.
NOTE: The restriction of not venting more than one appliance to the
same ue applies to the U.S. specically. In Canada, CSa B365-01
allows it, with specic restrictions. Be sure to contact your building
code inspection ofcial to see if this option is allowed in your area,
and to nd out the specic requirements for such an installation.
DO NOT CONNECT THIS UNIT TO A CHIMNEY
FLUE THAT IS SERVING ANOTHER APPLIANCE.