Trane Tracer MP501, Инструкция по установке, эксплуатации и обслуживанию

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CNT-SVX08F-EN 13
Applications for SCC Mode
Applications for SCC Mode
This section provides information about the function of inputs and outputs and examples of wiring
for typical applications controlling space temperature. When controlling a space temperature, the
MP501 is essentially a thermostat replacement.
The MP501 may be used to control many types of equipment, including:
•
Multi-zone damper control
• Base board radiation
• Small constant-volume air-handling unit
• Fan coil (pneumatic thermostat replacement)
• VAV (pneumatic thermostat replacement)
• Zone reheat
• Unit heater
Important: The MP501 ships from the factory configured in Space Comfort Controller (SCC)
mode. Use a service tool (such as the Rover service tool) to change the configuration
to match your particular application.
Inputs for SCC Applications
The MP501 includes four (4) inputs. Figure 2 lists the inputs and their function in SCC mode.
Table 2. Inputs (SCC mode)
Input Function
BI1 Occupancy or generic
AI1 Not used
SET Local setpoint
ZN Local zone temperature
BI1: Occupancy or Generic Binary Input
The binary input equates a signal of 0 Vac with open contacts and 24 Vac with closed contacts. The
binary input can function in two ways: as an occupancy input or as a generic binary input.
If configured as occupancy, the binary input (open is occupied) changes the zone setpoints
between the occupied and unoccupied settings. For stand-alone controllers, this input can be wired
to a binary switch (occupancy sensor) or time clock to determine the occupancy mode—either
occupied or unoccupied. For controllers receiving a communicated occupancy request, the
function of this binary input is to change the mode from occupied to occupied standby. (Refer to
the section,
“Occupancy Modes,” p. 19 .)
If configured as generic, the binary input can be monitored only by a BAS, and has no direct effect
on the operation of the MP501.
AI1: 4–20 mA Analog Input
This input is not used if the controller is operating in SCC mode. Neither the MP501 nor a BAS
system can use this input if the MP501 is configured in SCC mode.
SET: Local Setpoint
The SET analog input functions as the local (hardwired) temperature setpoint input for applications
utilizing a Trane zone sensor with a temperature setpoint thumbwheel. The ability to enable or
disable the local setpoint input is available in the Rover service tool. A communicated setpoint