13
English
Efficiency
80%
96%
97%
80%
96%
97%
Operation
2 - Stage
2 - Stage
Modulating
2 - Stage
2 - Stage
Modulating
Bracket
Bracket - A Bracket - B
Bracket -B
No Bracket
Bracket - A
Bracket - B
Up Flow
Down/Counter Flow
Table 3
Bracket ‘A’
Bracket ‘B’
NOTE:
Based on furnace model, the applicable bracket and PCB
transformer are mounted inside the furnace cabinet. It is recom-
mended to use (2) self cutting screws to secure the PCB trans-
former and bracket plate to the mounting position. See Figure
14, 15 and 16 to determine appropriate location.
8.4.1A
INSTALLATION BRACKET - “A”
Furnace transformer should be removed from the PCB control
deck. Align transformer bracket “A” and furnace transformer to
the mounting holes of the furnace transformer on the PCB con-
trol deck. Bracket “A” should be located between the PCB con-
trol deck and furnace transformer. Secure bracket and furnace
transformer to the PCB control deck. Align multi-tap EEV cased
coil transformer to transformer bracket “A” secondary mounting
holes and secure using (2) self cutting, field supplied screws.
See Figure 14.
Bracket ‘A’ mounted
behind factory
installed furnace
transformer
Cased Coil PCB
transformer
mounted to
transformer
bracket ‘A’
Figure 14
Installation of transformer bracket “A”
Installation of EEV cased coil transformer to transformer
bracket “A” within furnace cabinet
8.4.1B
INSTALLATION BRACKET - “B”
Furnace transformer should be removed from the PCB control
deck. Align transformer bracket “B” and the furnace transformer
to the mounting holes of the furnace transformer on the PCB
control deck. Bracket “B” should be located between the PCB
control deck and furnace transformer. Secure innermost bracket
mounting location and innermost furnace transformer mount-
ing hole to the PCB control deck. Align multi-tap EEV cased
coil transformer to transformer bracket “B” by overlapping the
base of furnace transformer and securing transformers together
to bracket and securing the left side of EEV transformer, using
(1) self cutting, field supplied screw. See Figure 15.
Bracket ‘B’ mounted
behind factory installed
furnace transformer
Cased Coil transformer
PCB mounted to
transformer Bracket ‘B’
Figure 15
Installation of transformer bracket “B”
Installation of EEV cased coil transformer to transformer bracket “B”
within furnace cabinet
8.4.1C
NO BRACKET INSTALLATION
The PCB transformer can be assembled to the Furnace Heat
Shield. Remove the Heat Shield from the Inner Door Assembly
by removing the (2) factory installed fasteners. Once removed,
fasten the PCB transformer to the heat shield using (2) field
suppled self-drilling screws. Locate the transformer to the heat
shield to the recommended location. See Figure 16. The trans-
former should be parallel to the edge of the heat shield and
installed on the side opposite of the flue pipe. Self-drilling screws
should not be longer than 0.75” to prevent interference with fur-
nace flue pipe. Re-assemble heat shield to the Inner Door As-
sembly.
•
Extreme caution must me taken when reassembing the heat
shield to the inner door assembly and wiring the transform-
ers so as to not damage the furnace control board or other
electrical components.
Figure 16
