MUA-SVX01A-EN • Direct-Fired Make-up Air
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Pre-Start-Up Check List
12. Check that the area around the unit is clear of flammable vapors or
containers of flammable liquids.
13. Check that all piping connections, particularly unions, are tight.
14. Check that all accessories requiring field wiring have been properly installed.
15. Check burner for proper location and alignment.
16. Check that filters and accessories are installed correctly.
17. Check that vent lines have been run to atmosphere on indoor units. Note that
some units will use vent limiters and vent lines are not required.
18. Check that all manual gas shut-off valves are closed.
19. When failure or malfunction of this heater creates a hazard to other fuel
burning equipment. (e.g. when the heater provides make-up air to a boiler
room), the heater is to be interlocked to open inlet air dampers or other such
devices.
20. Motor overload relay setting should match the motor’s nameplate full load
amperage.
21. Check that dampers and linkages are free to move, and that linkages are
tight.
22. If inlet duct is attached to the heater, a purge timer must be provided and set
to purge 4-times the inlet duct volume.
Purge time in seconds:
L = Duct length in feet
H = Duct height in feet
W = Duct width in feet
SCFM = Rating plate air throughput
Refer to the electrical schematic for proper circuit placement. Purge timer P/N
65.0711.00.
4 x L x W x H x 60
SCFM
