Preventive Maintenance Schedule; Filter Maintenance - Raypak Xfiire 300B Installation And Operation Manual

8. To avoid potential of severe burn, DO NOT REST
HANDS ON OR GRASP PIPES. Use a light touch;
return piping will heat up quickly.
9. Check blower and blower motor.
10. 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.
2. Test low water cut-off. (With heater in pre-purge,
depress the low water cut-off test button. Appliance
should shut-off and service light should come on.
Depress reset button on front of junction box panel
to reset).
3. Check and clean strainer in y-strainer or suction
diffuser for debris, if equipped.

Preventive Maintenance Schedule

The following procedures are recommended and are good
practice for all XFiire installations.
Daily
1. Check gauges, monitors and indicators.
2. Check instrument and equipment settings. See "Post
Start-Up Check" on page 59.
Weekly
For low-pressure heaters, test low-water cut-off device.
Monthly
1. Check flue, vent, stack, or outlet dampers.
2. Test blower air pressure. See "Blower Check" on
page 57.
3. Test high and low gas pressure interlocks, if
equipped. See "Safety Inspection" on page 58.
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 57.
4. Check piping and wiring of all interlocks and shut-off
valves.
Annually
1. Test flame failure detection system and pilot
turndown.
2. Test high limit and operating temperature. See "Post
Start-Up Check," page 59.
3. Check flame sensor.
4. Check flame signal strength. (Flame signal should
be greater than 1 microampere as measured at the
2 pins on the bottom of the PIM).
5. Conduct a combustion test at full fire. CO
be 8.3 to 8.8% at full fire for natural gas, and 9.5 to
10.0% for propane gas. CO should be less than 100
ppm.
6. Check emission at minimum fire and record CO and
CO reading. CO must be less than 100 ppm for all
2
fuels. CO must be between 7.5 to 8.5% for natural
2
gas, 9.0 to 10.0% for propane gas. If CO and CO
are not within these ranges, stop running the unit
and contact your Raypak representative.
7. 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 control 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.
8. Perform leakage test on gas valves. See Figure 62.
9. Inspect and clean burner using shop air.
A CAUTION: Do not clean with water.
10. Drain heat exchanger and inspect the water side
visually for build up or debris by removing inlet stub
pipe or suction diffuser inspection cover.
As Required
1. Recondition or replace low water cut-off device.
2. Check sediment trap and gas strainers.
3. Check flame failure detection system. See "Post
Start-Up Check," page 59.
4. Check igniter. Resistance reading should be 40-75
ohms at 77°F (25°C).
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 57.
7. Test safety/safety relief valves in accordance with
ASME Heater and Pressure Vessel Code Section IV.

Filter Maintenance

• Inspect quarterly.
recommended interval is once per year.
NOTE: Use Raypak replacement filters, for models 300B
- 1000B kit number 012553F.
should
2
Replace as needed.
2
The
65