Detroit Radiant Products Company MP Series - Manual (Page 9)

9
MP Series
Field Wiring
Field Supplied Control Wire: 18AWG plenum rated thermostat wire that is shielded w/ drain wire is
recommended for optimal performance .
Installing the Control Wire: Each heater includes a thermostat wire grommet to allow for thermostat wire
to be brought into the burner box . Insert the grommet into the low voltage wiring access hole . Feed the
thermostat wire through the grommet, piercing the rubber with the wire to ensure a tight seal . Ensure
enough wire length is available to make the proper connections . Tie the thermostat wire into a loose knot,
as shown in Figure 2 .1 . Ensure knot is loose enough to not cause any damage to the wire . This will allow
for a strain relief for the connections to the heater .
Figure 2.1 • Image for feeding the wire and showing the knot
Connections to the Heater: The control devices are connected to the Modulating Circuit Board (P/N:
TP-3250) via the thermostat terminal strips provided . The installer must select the appropriate thermostat
terminal strip to connect to the board depending on the control configuration desired . The unit will provide
the suitable voltage for each control device .
DO NOT provide an external power supply to the thermostat
terminal strips . Damage to the circuit board may result and is not covered by warranty .
Three (3) thermostat terminal strips are included with each heater to allow for connections to the heater .
Note that only one terminal strip will be used for each application, as selected by the installer . The
remaining thermostat terminal strips can be discarded or kept with the manual for future reference .
• TP-3228 – 8 circuit terminal strip to be used with Diagram “A” .
• TP-3225 – 5 circuit terminal strip to be used with Diagram “B” .
• TP-3224 – 4 circuit terminal strip to be used with Diagram “C” .
2.0 Installation • Thermostat and Other Controls • Field Wring