44
3.34 - Adjusting
the input rating
to the required
heat loss
The input rating of the heater can
be varied anywhere between the
minimum and maximum setting of
the heater to meet the required
heat loss of the space being
heated.
To adjust the input rating see
diagram in paragraph 8.3 showing
the correlation between the input
rating with the gas pressure to the
burner.
This diagram can be applied to both
NATURAL gas and LP gas.
To proceed follow these
instructions:
remove the heater cover panels;
remove the screw from the
pressure probe “-” (minus) on elbow
“C”, see figure 44;
remove the silicone tube from the
pressure coupling “+” (plus) on
elbow “C”, see figure 44;
connect a pressure gauge with a
resolution of at least 0.05 in.W.C.
(0.1 mbar), making a T connection
as shown in figure 43;
be sure to maintain the correct
polarities between the
connections;
turn on the heater, keeping
selector “4” in position “D” (see
figure 48). Heating energy saving
position;
After the heater reaches a
temperature above 140°F (60°C),
light “C” (see figure 48) should be
lit;
In this state you can adjust the imput
rating in the follow manner:
verify the required heat loss
compare the diagram in chapter
8.3 to the correct burner pressure
for your required heat.
use regulator “B” (see figure 45) to
adjust the minimum burner gas
pressure to the correct imput rating
for your heat loss. Be sure when
you make this adjustment that
lamp “C” is lit.
NOTE: Your domestic hot water
output will always function at the
maximum input rating.
3.35 - Adjust the
input rating to
the required
maximum
efficiency
The input rating of the heater can
be varied anywhere between the
minimum and maximum setting of
the heater to meet the required
heat loss of the space being
heated.
The efficiency of the heater
changes in relation to the adjusted
input rating. The diagram in
paragraph 8.4 shows the correlation
between the input rating and the
efficiency.
When adjusting your imput rating
follow paragraph 3.34, taking into
consideration this parameter.
3 - INSTALLATION
