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.
DO NOT CONNECT THIS uNIT TO A CHImNEy
fLuE THAT IS SErVING ANOTHEr AppLIANCE.
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 exist-
ing 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 config-
ured 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 domes-
tic 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. fitting on the
rear of the Trident Boiler. Next run a pipe from the
1-1/4 in. fitting on the top of the Trident Boiler to a
Tee fitting in the supply line of the existing boiler.
This Tee fitting must be installed between the ex-
isting boiler and the Flow Control Valve, as shown
in Fig. 6. An air valve should be installed on this
line also.
FIG.
FIG.
Air Valve
Notice:
The Aquastat controls supplied with
the Trident Boiler are designed only
to maintain water temperature within
the boiler. The actual heating sys-
tem is controlled separately by your
thermostat(s) opening zone valves or
energizing circulation pump(s).
Do not attach a thermostat to the sup-
plied controls.
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