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TABLE 3—JUMPER APPLICATIONS.
If your subbase has: Application
RC, RH terminals
adjacent terminals
nonadjacent
terminals
3. Firmly tighten each terminal screw.
4. Fit wires as close as possible to the subbase. Push
excess wire back into the hole.
5. Plug hole with nonflammable insulation to prevent
drafts from affecting the thermostat.
Fig. 5—Jumper RC and RH for single trans-
former system. Strip wire 3/4 in. [19 mm].
NOTE: Only the T874D Thermostat is shown with the
subbases. This thermostat/subbase provides 2-stage heat-
ing and 2-stage cooling connections. If using another
model, see Fig. 16 and Table 4.
TABLE 4—THERMOSTAT BULB
CONFIGURATOIN.
Model No.
Heating Bulbs
T874A
T874B
T874C
T874D
T874E
T874F
single transformer
system
special system
operation or LED
indication
Cooling Bulbs
H1
C1
H1
C1,C2
H1, H2
C1
H1, H2
C1, C2
C1, C2
H1, H2
Fig. 6—Jumper adjacent terminals for special
Use Fig.
system hookup. Strip wire 3/4 in. [19 mm].
5
6
7
Fig. 7—For nonadjacent terminals, use jumper
supplied with subbase.
3
60-1165—6
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