Raypak 090A Installation And Operating Instructions Manual

Contents

HEAT EXCHANGER RE-ASSEMBLY1. Heat exchanger water header O-rings should bereplaced with new ones.2. Install inlet-outlet and return water headers andinstall header retainer nuts and torque nuts evenly.3. Replace "V" baffles.4. Install thermostat sensing bulbs in header wellsand replace bulb retaining clips.5. Install inlet and return pipes in water headers usingpipe thread sealant.6. Install water pressure relief valve, sensor probe,and low water cutoff devices if so equipped.7. Open water supply and return shut-off valves. Fillheater and water piping system with water. Checkheater and piping system for leaks at full line pres-sure. Run system circulating pump for a minimumof 1/2 hour with heater shut-off.8. Shut down entire system and vent all radiation unitsand high points in system piping. Check all strain-ers for debris. Expansion tank water level shouldbe at the 1/4 mark and the balance of the tank filledwith air (when using Air-X-Tank).9. Install flue collector, jacket top and inspection pan-els. Install top holding screws. Install draft diverterand vent piping if so equipped.10. If gas piping was disconnected, reconnect gaspiping system and check for leakage using a soapsolution.11. Check for correct water pressure and water level inthe system. Make sure that system pump operatesimmediately on the call for heat. The system isready for operation.13. Within two (2) days of start-up, recheck all air ventsand expansion tank levels.COMBUSTION CHAMBER REMOVALTo remove combustion chamber you must first haveremoved the heat exchanger. Unbolt metal combustionchamber retainer from top and remove combustion cham-ber panels individually.19