57
7. Inspect and clean burner using shop air.
As Required
1. Recondition or replace low water cut-off device (if
equipped).
2. Check sediment trap and gas strainers.
3. Check flame failure detection system. (See “Post
Start-Up Check,” page 51.)
4. Check igniter. (Resistance reading should be
40-75 ohms at 77
°
F).
5. Check flame signal strength. (Flame signal should
be greater than 1
microampere
as measured at
the 2 pins on the bottom of the PIM).
6. Check firing rate control by checking the manifold
pressure. (See “Manifold Check” on page 49.)
7. Test safety/safety relief valves in accordance
with ASME Heater and Pressure Vessel Code
Section IV.
Filter Maintenance
• Inspect quarterly
• Replace as needed. The recommended interval is
once per year.
NOTE:
Use Raypak replacement filters, kit number
014492F.
