MAINTENANCE
6-3
2.
Remove the left side panel from the unit.
3.
Disconnect the flame detector lead wire and unscrew the flame detector and remove it from the
burner.
4. Inspect the detector thoroughly. If eroded, the detector should be replaced. A white coating is an
indication of oxidation, which may be removed with an abrasive cloth (such as Scotch Brite).
NOTE:
Although flame strength may be checked using the C-More controller display (see OPERATING
MENU, Section 3.4 on page 3-5 and Table 3.2), it is strongly recommended that you instead use the
procedure as described in Section 6.3, page 6-18 for accurate flame strength measurement and to
assure trouble free operation of the flame detection circuit.
5. Reinstall the flame detector hand tight only, and reconnect the flame detector lead wire.
6.
Replace any panels previously removed.
6.4 COMBUSTION CALIBRATION
Combustion settings must be checked at the intervals shown in Table 6-1 as part of the maintenance
requirements. Refer to Section 4 for combustion calibration instructions.
6.5 SAFETY DEVICE TESTING
Systematic and thorough tests of the operating and safety devices should be performed to ensure that
they are operating as designed. Certain code requirements, such as ASME CSD-1, require that these
tests be performed on a scheduled basis. Test schedules must conform to local jurisdictions. The results
of the tests should be recorded and preserved as directed by ruling jurisdictions. See Section 5-Safety
Device Testing Procedures.
6.6 BTU TRANSMITTER PUMP LUBRICATION
The BTU Transmitter pump should be lubricated every six months. There are two oil ports located on the
top of the pump, (see Fig. 6.2). Oil using 4 to 5 drops of SAE20 weight non-detergent oil at each port. DO
NOT OVER OIL.
Figure 6.2
BTU Transmitter Pump Oil Port Locations
6.7 BTU TRANSMITTER ASSEMBLY
The BTU Transmitter is a crucial part of the unit’s temperature control system. It must be inspected and
kept free of scale and debris in order for the unit to maintain accurate outlet water temperatures.
To inspect the transmitter:
1. Place the
ON/OFF
switch in the
OFF
position.
2. Remove the sheet metal side panels and hood from the unit.
3. Shut the water inlet, outlet and recirculation valves to the unit.
