Specifications

Armstrong International
IOM-706
Flo-Direct Water Heater
Page 30 of 45
Periodic Maintenance
Frequency Task
Daily
Check output temperature (non-modulated). (To change, adjust water flow valve slowly and in small
increments allowing time for change to take effect. Increase water flow to decrease temperature and vice
versa).
Weekly
Check air filters if present. Clean or replace as necessary (see manufacturer's information).
Check for water leaks.
Monthly
Check fuel train for leaks.
Remove and wipe off quartz lens below flame sensor.
*Check water pressure switch:
• Turn off water supply while heater is in operation
• Confirm that heater shuts down within 10 seconds and "WATER PRESSURE FAULT" light comes on
*Check low gas pressure switch:
• Turn off the fuel supply while heater is in operation
• Confirm that heater shuts down and "LOW GAS PRESSURE" fault light comes on
*Check high temperature switch (see instructions below).
Inspect burner’s air damper linkage (use a borescope through burner’s window).
Check spark rod connection and wire.
*Check the Veri-Flame controller:
With heater running, close ball valve in fuel train just upstream of burner.
• Burner should go out
• Veri-Flame control should show no indication of flame
• Control should de-energize safety shut-off valves (there will be a "clunk" sound as valves close; some
models also have indicator lights)
If results are not as described, a hazard condition exists. Shut down heater and contact
Armstrong.
Annually
Check all electrical connections.
Check all nuts and bolts.
Check float switches for proper operation.
Check all fuel train connections and fittings.
Check all water train connections and fittings.
Note: Periodic maintenance for blower and burner is not shown below. See those IOMs for required maintenance.
The Flo-Direct heater is designed to require very little maintenance. The list below is recommended, but only safety
items (*) are required.
Maintenance Schedule