Element
Operation and Maintenance
L-OMM-0003_A
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9. Check the electronic-ignition system for quick ignition and proper flame signal.
10. Check gas safety shut-off valves for proper operation and tightness.
11. Follow startup procedure in this Installation, Operation & Maintenance manual.
16.1.10.2 Semi-Annually (Every 6 Months)
1. Test Low-water-cut-
off (if equipped). Refer to manufacturer’s instructions and reset.
2. Test the electronic-
ignition flame failure detection system. Refer to manufacturer’s
instructions and reset.
16.1.10.3 Monthly
1. Check condensate drain system and refill the condensate neutralizer with replacement
media (change interval as needed).
2. Visually inspect venting system for proper function, deterioration or leakage.
3. Confirm the low-water cutoff and alarm are operating.
16.1.10.4 Daily
1. Check for and remove any obstruction to the flow of combustion or ventilation air to the unit.
2. Ensure area is free from combustible materials, gas, and other flammable vapors or liquids.
3. Check gauges, monitors and indicators.
16.1.10.5 As Required
Flush and clean tank as required using the blowdown cycle with the unit valved off from service
and vented. Upon refill and restart, ensure any trapped air is removed.
16.2 Cold and Recirc Sediment Filter Maintenance
The Edge SC will inform users when the cold or recirc filters should be ordered and replaced,
based on pressure drop due to collected sediment and foreign material within the system.
16.2.1 Changing Recirc Filter
1. Close the upstream return ball valve (Figure 83) and downstream ball valve (Figure 84).
Figure 83- Upstream Return Valve
Figure 84 - Downstream Return Valve
