RT-SVD03G-EN 37
ReliaTel Option Module (RTOM)
RTOM Inputs
J1, J2 Inputs:
J1 provides 24VAC power and MODBUS communication to and from the RTRM (via the COMM
module if used). J2 sends power and communication to the ECA (if used).
J3 Inputs:
J3-1 to J3-2 – Allows supply air tempering when using a mechanical ZSM. Removed = supply air
tempering enabled, installed = disabled. Supply air tempering can also be enabled or disabled by
using the BAYSENS019*/AYSTAT666* or a Trane ICS system.
J3-3 is modulating gas heat config. input
J3-4 is used with 27.5 - 50 ton units to configure condenser fan control type.
J3-5 is used to configure the unit as a Voyager III unit. (27.5 - 50 ton units only).
J4 Inputs:
Discharge air sensor (10K @ 77°F/25°C) allows supply air tempering, also discharge air
information for Building Automation systems (BAS) using COMM5 such as Tracer Summit™ V13
and Tracker™ Version 10. Earlier versions of Tracker (V6.5 and below) and any Tracer system using
COMM3 or COMM4 do not recognize this input.
The input seen by Tracer (using COMM3 or COMM4) and Tracker (prior to Version 10) is “Supply
Air Temperature”, which is actually the Mixed Air Temperature input from the ECA to the RTRM. The
other inputs on J4 are not used.
J5 Output:
J5 is the 2-10 VDC output used when the unit has modulating gas heat.
J6 Inputs:
Ventilation override inputs J6-1, 2, 3 are explained in the application section of this manual.
Remote Shutdown – when this input is open, the unit runs normally. When closed, the unit shuts
down after minimum run times are met, up to 4 minutes. This is not the same as the emergency
stop inputs on LTB 5&6.
J7 Inputs:
Frostat:
When the Frostat opens, the compressors will re-start. There is no diagnostic during Frostat trip.
Clogged filter switch is factory set to close at 0.45”, however is adjustable from 0.05” to 12.0”.
A 7/32” allen wrench is required for this adjustment. When the switch is closed for 2 minutes, the
service indicator on the ZSM will be on (see diagnostics section for details). When the switch opens,
the indicator is off (auto reset).
Fan proving switch (3-25 tons) is factory set to open at 0.07”, and is adjustable from 0.05” to 12.0”,
though adjustment is not recommended. If the switch does not open within 40 seconds after the
fan starts, the unit stops, requiring manual reset from the Zone Sensor or BAS system, or by
resetting power to the unit. The SERVICE indicator on the ZSM will pulse during fan fail mode.
Fan proving switch (27½-50 tons) is factory set to close at 0.15”, and is adjustable from 0.05”
to 12.0”, though adjustment is not recommended. If the switch does not close within 40 seconds
after the fan starts, the unit stops, requiring manual reset from the Zone Sensor or BAS system, or
by resetting power to the unit. The SERVICE indicator on the ZSM will pulse during fan fail mode.
3 – 25 ton
Closes 10F ±2º
Opens 50F ±2º
27.5 – 50 ton
Closes 30F ±2º
Opens 40F ±2º
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