Raypak MVB 504A Installation & Operating Manual

Raypak MVB 504A Installation & Operating Manual Manual pdf 54 page image

543. Check that area is free from combustible materi-als, gasoline, and other flammable vapors andliquids.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 lightblue at full input. Remove and visually inspect hotsurface igniter and sensor for damage, cracking ordebris 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 RESTHANDS 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 valvesand other fittings. Repair, if found. DO NOT usepetroleum-based stop-leak.Periodically1. Check relief valve. Refer to manufacturer’sinstructions on valve.2. Test low water cut-off (if equipped). Refer to manu-facturer’s instructions.Preventive MaintenanceScheduleThe following procedures are recommended and aregood practice for all MVB installations.Daily1. Check gauges, monitors and indicators.2. Check instrument and equipment settings. (See“Post Start-Up Check” on page 49.)3. Check burner flame. (Should see light blue flameat full input rate).WeeklyFor low-pressure heaters, test low-water cut-offdevice. (With heater in pre-purge, depress the lowwater cut-off test button. Appliance should shut-offand ignition fault light should come on. Depress resetbutton on front of heater control panel to reset).Monthly1. Check flue, vent, stack, or outlet dampers.2. Test blower air pressure. (See “Blower Check” onpage 46.)3. Test high and low gas pressure interlocks (ifequipped). (See “Safety Inspection” on page 48.)Semi-Annually1. Recalibrate all indicating and recording gauges.2. Check flame failure detection system components.3. Check firing rate control by checking the manifoldpressure. (See “Manifold Check” on page 47.)4. Check piping and wiring of all interlocks and shut-off valves.5. Check air filter and replace as necessary.Annually1. Test flame failure detection system and pilot turn-down.2. Test high limit and operating temperature. (See“Post Start-Up Check,” page 49.)3. Check flame sensor.4. Conduct a combustion test at full fire. Carbon diox-ide should be 9.0% at full fire for natural gas, and10.2% for propane gas. Carbon monoxide shouldbe < 150 ppm.5. Check valve coil for 60 cycle hum or buzz. Checkfor leaks at all valve fittings using a soapy watersolution (while heater is operating). Test otheroperating parts of all safety shut-off and controlvalves and increase or decrease settings(depending on the type of control) until the safetycircuit opens. Reset to original setting after eachdevice is tested.