77
AUxILIARy INPUTS
INTEGRATED FURNACE CONTROL
active furnace information at the thermostat and
improved diagnostics and troubleshooting.
WIRING A FURNACE FOR COMMUNICATIONS.
Maximum wire lengths and notes about wiring
communicating systems are noted below.
MAxIMUM COMMUNICATING WIRE LENGTHS
(E1, E2, R & C)
Max Wire Length – Thermostat to Furnace =
125 FT
@ 18 AWG*
Max Wire Length – Furnace to Condenser =
125 FT
@ 18 AWG*
Max Wire Length – Between any 2 devices =
125 FT
@ 18 AWG*
Sum Max Total Wire Length for All Components = 500 ft
(see Figure 55)
Notes:
1. Wires may be solid or stranded.
2. *Wire gage smaller than 18 AWG is not approved or
recommended for this application.
3. If the thermostat wiring will be located near or in
parallel with high voltage wiring, cable TV, Ethernet
wiring, or radio frequency equipment, then shielded
thermostat wire can be used to reduce or eliminate
potential interference. The shielding must be
contiguous (have continuity) across all devices and all
wire segments. This should be done by twisting the
shielding wires from adjacent segments together.
Further, the shielding for the entire system must be
grounded in a single location. Multiple grounds on the
shielding system are NOT permitted. The shield wire
should be connected to the C terminal, or ground, at
the indoor unit. The shield wire should NOT be
connected to any terminal at the Control Center (aka;
Thermostat). Connecting the shield to ground at both
ends can cause current loops in the shield, reducing
shield effectiveness.
4. When using existing wire from a previous installation,
be sure to trim the tip of the wire back past the
insulation and strip a small amount of insulation from
the wire to expose clean new copper for the
communicating connections. Fresh copper must be
exposed when making the communicating
connections or communications may not be properly
established.
FIGURE 54
WIRING OF SUPPLy AIR (SA) AND OUTDOOR AIR (OAT) TEMPERATURE SENSORS.
ST-A1194-63-01
NOTE: SUPPLY AIR SENSOR MUST NOT
BE IN DIRECT LINE-OF-SIGHT TO
THE HEAT EXCHANGER.
ST-A1194-63 (BOTTOM)
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Содержание (-)98VA060M317USA
Страница 12: ...Field Conversions FIELD CONVERSIONS 12 ...
Страница 13: ...FIELD CONVERSIONS Field Conversions 13 SEE NExT PAGE FOR APPLICABLE CONFIGURATIONS ...
Страница 15: ...Field Conversions 15 ...
Страница 16: ...Field Conversions ST A1194 68 00 16 ...
Страница 17: ...Field Conversions 17 ...
Страница 18: ...Field Conversions 18 ...
Страница 43: ...43 CONDENSATE DRAIN CONDENSATE DRAIN DRAIN NEUTRALIzER cont Condensate Drain FIGURE 29 ST A1194 70 00 ...
Страница 86: ...86 Timing Diagram TIMING DIAGRAM TABLE 16 TIMING DIAGRAM FOR A CALIBRATION GAS HEAT SEqUENCE ST A1240 03 00 ...
Страница 87: ...87 TIMING DIAGRAM TABLE 17 TIMING DIAGRAM FOR NON CALIBRATION GAS HEAT SEqUENCE Timing Diagram ST A1240 04 00 ...
Страница 92: ...92 Diagnostics TABLE 19 R98V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS ...
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Страница 105: ...105 FIGURE 67 MODULATING ECM FURNACE WIRING DIAGRAM Troubleshooting ...
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