Trane ReliaTel - Setpoint input

RT-SVD03G-EN 79
Zone Sensor Module Testing
Setpoint input
Terminals to read voltage: RTRM J6-3 (cooling), J6-5 (heating), J6-2
Read DC voltage with Zone Sensor Module (ZSM) attached. If voltage read does not appear to be
correct, read the resistance of the circuit, then the ZSM itself, to see if a problem exists in the ZSM
or the wiring. With the ZSM not attached there should be 5.00 VDC at the terminals as shown. To
check for induced voltage, read AC voltage to ground from each sensor wire. Should be less than
2VAC.
Problems to look for:
• Miswire/short/open
• Excessive resistance in circuit (corroded or loose connection)
• Setpoint lever inaccurate (should be +-2F of chart)
• Induced voltage (high voltage wires in same conduit)
Table 27.
Setpoint Inputs Read voltage at either location
Cooling setpoint RTRM J6-3 ZSM terminal 3
Heating setpoint RTRM J6-5 ZSM terminal 5
Common RTRM J6-2 ZSM terminal 2
Heating Setpoint
Mode Input
Cooling Setpoint
Common
Zone Temperature
RTRM J6
DC
Volts
5.00
Table 28. Setpoint Inputs
Temp
°F
Resistance
(K ohms) DC Volts
Temp
°F
Resistance
(K ohms) DC Volts
Temp
°F
Resistance
(K ohms) DC Volts
Temp
°F
Resistance
(K ohms) DC Volts
open
5.00 (open
circuit)
53 0.8373 2.278 67 0.5584 1.792 81 0.2858 1.111
40 1.0841 2.601 54 0.8166 2.247 68 0.5390 1.751 82 0.2663 1.051
41 1.0656 2.579 55 0.7958 2.216 69 0.5195 1.709 83 0.2468 0.990
42 1.0472 2.557 56 0.7751 2.183 70 0.5000 1.667 84 0.2273 0.926
43 1.0287 2.535 57 0.7544 2.150 71 0.4805 1.623 85 0.2079 0.860
44 1.0102 2.513 58 0.7337 2.116 72 0.4610 1.578 86 0.1884 0.793
45 0.9918 2.490 59 0.7142 2.083 73 0.4416 1.532 87 0.1689 0.723
46 0.9733 2.466 60 0.6948 2.050 74 0.4221 1.484 88 0.1495 0.650
47 0.9548 2.442 61 0.6753 2.015 75 0.4026 1.435 89 0.1301 0.575
48 0.9363 2.418 62 0.6558 1.980 76 0.3832 1.385 90 0.1106 0.498
49 0.9179 2.393 63 0.6363 1.944 77 0.3637 1.333 (shorted/no power) 0.000
50 0.8994 2.368 64 0.6169 1.908 78 0.3442 1.280
51 0.8787 2.338 65 0.5974 1.870 79 0.3247 1.226
52 0.8580 2.309 66 0.5779 1.831 80 0.3053 1.169