Trane Precedent YHJ072A Installation, Operation And Maintenance Manual page 33

Figure 40. Discard cover plate
2. Locate the vent hood behind the panel, on the right side
of the burner assembly.
Figure 41. Vent hood shipping location
3. Install the vent hood on the gas heat panel using the
screws removed in Step 1. Make sure it is properly
secured to the panel.
RT-SVX075A-EN
Figure 42. Vent hood installation
Temperature Limit Switch Usage
Units are factory shipped in the downflow discharge
configuration but can be field converted to a horizontal
discharge configuration. Some, but not all units require a
different TCO1 limit switch, which is either attached to the
combustion blower motor (6 to 12.5 tons) or to the installed
TCO1 limit switch (15 to 25 tons) if horizontal discharge
configuration is used.
If any of the units are installed in the downflow discharge
configuration and have the alternate TCO1 limit switch
provided, remove the additional TCO1 limit switch which is
either attached to the combustion blower motor (6 to 12.5
tons) or to the installed TCO1 limit switch (15 to 25 tons)
and discard.
For detailed instructions, refer to
34.
Table 3. TC01 tripping values
Unit Model
Tons
Number
YHJ072A**(0,A)L
YHJ072A**(0,A)M
6
YHJ072A**(0,A)H
YHJ090A**(0,A)L
YHJ090A**(0,A)M
7.5
YHJ090A**(0,A)H
YHJ102A**(0,A)L
YHJ102A**(0,A)M
8.5
YHJ102A**(0,A)H
YHJ120A**(0,A)L
YHJ120A**(0,A)M
10
YHJ120A**(0,A)H
YHJ150A**(0,A)L
YHJ150A**(0,A)M
12.5
YHJ150A**(0,A)H
YHJ180A**(0,A)L
YHJ180A**(0,A)M
15
YHJ180A**(0,A)H
Installation
"TCO1 Instructions," p.
TCO1 Tripping Values -
Downflow/Horizontal
105°F
120°F
140°F
120°F/110°F
130°F/135°F
125°F/150°F
120°F/110°F
130°F/135°F
125°F/150°F
135°F
125°F/140°F
130°F/150°F
125°F/130°F
130°F
110°F
140°F-3 inch/150-7 inch
150°F-3 inch/195°F-3 inch
150°F-3 inch/200°F-3 inch
33