User's Manual

MTU Instruction
for STAR Submetering MTUs with Pulse Adapters
Step 4 - Mount the MTU on a wall, joist or
other convenient mounting location well
away from the heat source using two
screws.
CAUTION
The MTU must be located
away from the appliance and
ONLY in a location that
remains at room temperature.
Run the cable from the MTU to the end of
the thermocouple wire. Trim excess MTU
cable, as needed. Care must be taken to
protect the cable from damage by hot
surfaces or sharp sheet metal. Use
insulated staples or cable ties as needed.
Note: Be sure to follow all General
Mounting & Wiring Guidelines outlined in
Publication 471-2000.
Step 5 - Splice the MTU wire to the
thermocouple wire using the IDCs
provided. Use a cable tie(s) to provide
strain relief for the wiring.
● Connect the VIOLET
thermocouple wire to the RED
MTU wire.
● Connect the RED thermocouple
wire to the BLACK MTU wire.
Do not remove the insulation from either
the MTU wires or the thermocouple wires;
the IDC is designed to pierce the
insulation.
Step 6 - Secure the MTU wire. Verify
that the MTU cable does not run near the
burner and does not enter any region
where the temperature will exceed 70° C
(160° F).
Step 7 – Program the MTU using the
MTU Programmer as outlined in the
Programming section of this document.
Step 8 - Reset the burner or fireplace
control so that the appliance can run.
Programming
Note: The 501-7786PT2 MTU requires
Star Programmer Software version 6.0.0
and meter table version 3.85 or higher.
Step 1 - Turn on the Psion MTU
Programmer by pushing On/Esc.
Step 2 - Highlight the STAR icon (in the
Psion desktop screen) using the left/right
arrow keys. Press
Enter.
At this point, the STAR software loads
along with the Meter table, Database
table, and Appointment table. If these are
loading for the first time, it may take
several minutes. When complete, the
serial number verification screen will
appear.
Note: A “Communication Error”
message may occur:
● If an attempt is made to read
and/or program the MTU and the
MTU is receiving input from the
gas appliance to which it is
wired.
OR
● If an attempt is made to read
and/or program the MTU and
there is a wiring error in the
wiring between the MTU and the
thermocouple.
Verify that the gas appliance is off and
that the thermocouple is correctly
connected.
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