A
M-TRAC1
IOM-55
May 2019
9
DISCHARGE TEMPERATURE (DTEMP)
The DTEMP measurement point is located on the top left corner of the M-TRAC. The voltage
reading relates to the actual temperature of the discharge sensor.
Table 5
Voltage (Vdc)
˚C
˚F
1
10
50
1.5
15
59
2
20
68
2.5
25
77
3
30
86
3.5
35
95
4
40
104
NOTE: Sensor accuracy is diminished at temperatures greater than those noted in this table.
PROFILE PLATE VELOCITY
The profile plate has been factory set for the airflow shown in the submittal record.
The profile plate air velocity status can be determined by reading the DC volts measured
between the profile measurement point (located close to terminal S) and terminal N. When the
profile velocity is optimum, the reading is 6 Vdc. For other voltage readings see Table 6.
Note that if the airflow is reduced below safe operating conditions there are delays built into
the M-TRAC1 that will shut off the flame within 45 seconds.
TABLE 6
Test Point Reading
Status
Result
Below 0.8 volts
Very low or no
airflow
Unit lockout
Between 0.8 and 4.0
volts
Low airflow
If the burner is already off it is disabled. If the
burner is on, variable timed lockout.
Between 4.0 and 7.0
volts
Operating range
Normal
Over 7.0 volts
High airflow
If the burner is already off it is disabled. If the
burner is on, variable timed lockout.
M-TRAC models with a ( -P ) designation (propane) will operate with a slightly higher airflow.
LOCKOUT RESET
To reset the M-TRAC1 from a lockout condition push the “Reset Push Button” located just
above the DIP switch block. If the M-TRAC1 looses power while locked out, the status codes
