Manual
13
START-UP OF THE UNIT
1. Turn the remote switch to the "OFF" position.
2. Turn the main disconnect switch to the "OFF" position.
3. Remove the control cabinet cover and the blower cabinet cover.
4. Turn all the manual gas shutoff valves to the "OFF" position.
5. Check to make sure that all wiring has been completed according to the furnished wiring
diagram including the installation of all field installed components.
6. Check all wiring terminals for tightness and good connection.
7. Make sure all manual resets have been reset.
8. Check all gas line connections for leaks including those within the unit.
9. Measure the incoming gas supply pressure at the field installed 1/8" tap upstream of the
unit. Verify that it falls within the minimum and maximum nameplate values.
10. Check that pulleys are in alignment and locked to the shaft.
11. Check for the proper input voltage (given on the nameplate).
12. Turn the remote fan switch to the "ON" or "SUMMER" position (depending on which
remote control option was ordered) and turn the main disconnect to the "ON" position.
13. Verify fan rotation, belt tension and motor amp draw. Make certain the blower motor is not
overloaded. Replace the blower cabinet cover.
14. Set the remote temperature selector above the outside air temperature to simulate a call
for heat.
15. Open pilot gas shutoff valve.
16. Turn the remote heater switch to the "ON" or "WINTER" position (depending on which
remote control option was ordered).
17. Verify that the burner control module energizes the ignition transformer, opens the pilot
valve, that the pilot flame is established and that the main valves are then energized.
18. Using a volt-ohmmeter, measure the flame signal at the +/- test jacks on the flame signal
amplifier (refer to the Honeywell RM7890 manual for more detailed instructions). The
signal should measure between 1.25 and 5.0 Vdc. Adjust the pilot pressure regulator to
obtain a value near the midpoint of the range.
19. If the outside air temperature is high, the high temperature limit may have to be jumpered
to prevent shutdown during the following high fire adjustment. Reset it to a value greater
than 120 degrees above the outside air temperature.