Preventative Maintenance Schedule - Raypak XTherm Series Installation & Operating Instructions Manual

3. Check that area is free from combustible mate-
rials, gasoline, and other flammable vapors and
liquids.
4. Check air filter and replace as necessary.
5. Follow pre-start-up check in the Start-up section.
6. Visually inspect burner flame. It should be light
blue at full input. Remove and visually inspect hot
surface igniter and sensor for damage, cracking or
debris build-up.
7. Check operation of safety devices. Refer to manu-
facturers' instructions.
8. Follow oil-lubricating instructions on pump (if
re-quired). Over-oiling will damage pump. Water-
lubricated circulators do not need oiling.
9. To avoid potential of severe burn, DO NOT REST
HANDS ON OR GRASP PIPES. Use a light touch;
return piping will heat up quickly.
10. Check blower and blower motor.
11. Check for piping leaks around pumps, relief valves
and other fittings. Repair, if found. DO NOT use
petroleum-based stop-leak.
Periodically
1. Check relief valve. Refer to manufacturer's instruc-
tions on valve.
2. Test low water cut-off (if equipped). Refer to
manu-facturer's instructions.
Preventive Maintenance
Schedule
The following procedures are recommended and are
good practice for all XTherm installations.
Daily
1. Check gauges, monitors and indicators.
2. Check instrument and equipment settings. (See
"Post Start-Up Check" on page 51.)
3. Check burner flame. (Should see light blue flame
at full input rate).
Weekly
For low-pressure heaters, test low-water cut-off device.
(With heater in pre-purge, depress the low water cut-
off test button. Appliance should shut-off and ignition
fault light should come on. Depress reset button on
front of heater control panel to reset).
Monthly
1. Check flue, vent, stack, or outlet dampers.
2. Test blower air pressure. (See "Blower Check" on
page 49.)
3. Test high and low gas pressure interlocks (if
equipped). (See "Safety Inspection" on page 50.)
Semi-Annually
1. Recalibrate all indicating and recording gauges.
2. Check flame failure detection system components.
3. Check firing rate control by checking the manifold
pressure. (See "Manifold Check" on page 49.)
4. Check piping and wiring of all interlocks and shut-
off valves.
5. Check air filter and replace as necessary.
Annually
1. Test flame failure detection system and pilot turn-
down.
2. Test high limit and operating temperature. (See
"Post Start-Up Check," page 51.)
3. Check flame sensor.
4. Conduct a combustion test at full fire. Carbon diox-
ide should be 9.7% at full fire for natural gas, and
11.2% for propane gas. Carbon monoxide should
be less than 100 ppm.
5. Check valve coil for 60-cycle hum or buzz. Check
for leaks at all valve fittings using a soapy water
solution (while heater is operating). Test other
operating parts of all safety shut-off and con-
trol valves and increase or decrease settings
(depending on the type of control) until the safety
circuit opens. Reset to original setting after each
device is tested.
6. Perform leakage test on gas valves. (See Fig. 56.)
56