Munters RDT-5 Triple Phase Digital Thermostat User Manual

Munters RDT-5 Triple Phase Manual: Questions and Answers

Munters RDT-5 Triple Phase specifications

Full specifications, page 23

What are the relay jumpers on the Munters RDT-5 Triple Phase and how do I set them?

Each relay has jumpers that must be positioned to set it for heating or cooling operation.

1. Locate the jumpers on each relay board.
2. Place the jumper over the required pins to set the relay as a heater or cooler. User Manual, p. 14

What does the (5V) indicator mean on the Munters RDT-5?

It shows that the RDT-5 supplies 5V to the RS-485 Communication Card and must always be enabled. User Manual, p. 21

Do I need to enable termination on every unit in an RS-485 chain?

No. Enable 120 ohm termination only on units at the beginning and end of the chain using the S2 dipswitch. User Manual, p. 21

What is the difference between RDT-5 chain endpoint and mid-chain dipswitch settings?

At an endpoint, enable S2 termination. In the middle, leave S2 off. Both keep (5V) and S3 enabled.

User Manual, p. 21

How do I use the buttons on Munters RDT-5?

Select shows current temperature. Down Arrow opens general settings. Up Arrow sets growth day. Stage navigates between stages.

User Manual, p. 10

How do I reset Munters RDT-5 Triple Phase to factory defaults?

Cold Start restores default settings. Perform only when advised by dealer or Munters technician.

1. Disconnect power.
2. Apply power while pressing Select, Up Arrow, and Down Arrow simultaneously.
3. Press Select when Cold Start Screen appears. User Manual, p. 9

Can the Munters RDT-5 operate if the CPU stops working?

Yes. The CPU only enters unit parameters; it does not run the unit. User Manual, p. 17