Harman Stove Company SF160 - Manual (Page 7)


Wiring and Electrical
Following the wiring diagram, run all wires
to their designated connections. Save the main
power for the last hook-up, and leave the breaker
in the off position. The sensor wires attach to the
A350 Controller on the terminals marked “sen”
and “com”. Make sure the sensor is submerged
fully into the well and secured with the set-screws.
Setting The Aquastat
Inside the A350 control, you will see a
square jumper, and a differential dial. Be sure the
jumper is in the “Heating” position. The differen-
tial dial is set to determine how low, below the
temperature set point, you want the water tem-
perature to go before the Automatic Draft Control
opens. A good initial setting for this dial is 5°. Be
sure the 120V wires are attached to the common
and the normally open terminals, and replace the
cover. The external dial is set for the water tem-
perature you wish to maintain, a good setting is
180°.
Inside the Y350 control, ensure that your
wires are connected to the 120VAC terminals,
and replace the cover.
Inside the S350 control, which is used as
overheat protection, you’ll see two dials; offset,
and differential. There is also a jumper which, in
this case, gets placed in the “cooling” position.
The offset dial sets the number of degrees above
the A350 setpoint that you want the overheat
dump to activate. A good set point would be 20°.
That would mean that if the water reaches 200°,
using the A350 setpoint of 180°, the S350 would
close it’s contacts and energize the overheat
dump zone. The differential dial sets the point that
the overheat dump would stop. With the differen-
tial set at 15°, using the temperatures above, the
circuit would re-open, stopping the overheat dump
at a water temperature of 185°. The 120V wiring
is attached on the normally open and the common
position. The normally closed position is not used.
Re-install the covers onto the three Con-
trols.
Optional Items
There is a domestic hot water coil available
for your Trident Boiler. The coil installs in the front
of the boiler, and allows your domestic water to
be heated by the heating system water. Install the
coil now, by removing the round plate and replac-
ing it with the coil and it’s round plate. Be sure to
tighten the bolts evenly, to ensure a good seal.
If electric back-up is desired, install now.
There will be two additional control boxes to add
to your aquastat, which will require the use of
a longer din rail. The two heating elements will
install into the front of the boiler as shown in Fig. 1
FIG.
Venting
The Harman Trident Boiler must be in-
stalled into a chimney approved for solid fuel
burning appliances. In the U.S., the boiler must be
connected to; (1) a prefabricated chimney comply-
ing with the requirements for Type HT chimneys in
the Standard for Chimneys, Factory Built, Resi-
dential Type and Building Heating Appliances, UL
103. Or; (2) a code approved masonry chimney
with a flue liner. In Canada, with prefabricated
chimney systems tested and listed to the High
Temperature Chimney Standard ULC S-629, or
with a code approved masonry chimney. The
minimum recommended height for any chimney
is 16 ft. (4.8m) above the flue collar. Do not re-
duce flue diameter. Nominal size flue is 8 X 8 in.
or equivalent, up to 8 X 12 in. Codes also require
that the chimney must extend a minimum of
Installation