Raypak HI DELTA 302B Installation & Operating Instructions Manual

Also see for HI DELTA 302B: Brochure & specs Specification sheet Replacement parts Specifications

Raypak HI DELTA 302B Installation & Operating Instructions Manual Manual pdf 34 page image

34Fig. 28: Status LED Indicator DecalHeater Sequence of OperationModels 302B-902B1. The black (hot) wire lead goes directly to the mainpower switch. This black toggle switch is locatedat the middle front of the control compartment.2. When the main power switch is placed in the “ON”position, 120 VAC is applied to the 120 VAC termi-nal block on the circuit board and the 120/24 VACtransformer is powered.3. 120 VAC is waiting at the N.O. contacts of theEconomaster pump delay.4. Terminals L1 and F1 of the ignition module arepowered with 120VAC.5. 120 VAC power is also applied to the controlpower connector on the circuit board.6. 120 VAC power is waiting at the N.O. contacts ofK-3 relay to energize the heater blower.7. The 120/24 VAC transformer outputs 24 VAC.8. 24 VAC is sent to pin L1 of the low water cut-off(optional) and the red power light is energized.9. 24 VAC is applied to the blue power light locatedon the status display board.10. 24 VAC is also applied to the red LED safety shut-down light on the front status board until thesafeties have been proven.11. 24 VAC is applied to the alarm circuit (optional). Ifthe E-5 sales option (Alarm) is included a 5 sec-ond time delay relay will not allow the alarm tosound unless a safety or limit circuit stays ener-gized for more than 5 seconds.12. Power is applied to terminal P1-1 of the UniversalDiagnostics Board. 24 VAC power is then appliedin series to all typically closed safeties wired intothe heater. All safeties are verified to ensure that itis safe to operate the heater. The safety compo-nents wired into the diagnostic board are: lowwater cut-off (optional), blocked vent switch, man-ual vent temp switch (optional), manual reset highlimit, low gas pressure switch (optional), high gaspressure switch (optional), and auto-reset highlimit (optional).13. If any of the safeties do not close, a signal is sentto the Universal Diagnostics Board to indicate asafety fault.14. Power is applied to terminal TP-1 of theEconomaster pump delay to energize the circuitboard.15. Once all safeties are closed and verified, a 24 VACsignal is output from the Auto High Limit to J5 pin3 of the CPW board of the heater.16. 24 VAC power is now sent to the coil of relay K-1.17. Relay K-1 (N.C.) will now be energized, and opensthe N.C. contacts to disable the alarm (optional)and turns off the red LED safety shutdown light onthe front status board.18. The common terminal of the Auto High Limit willnow send a 24 VAC signal to pin 1 of the “panelswitch”.19. The “panel switch” (rocker switch) located at thelower left front of the control compartment is nowpowered. If the switch is “ON” and there is no callfor heat (CFH), the heater is in standby mode.20. After the standby switch is placed into the “ON”position, a 24 VAC signal is sent to the“enable/disable” connection (normally jumpered).21. 24 VAC switched power is applied to the S24V ter-minal on the ignition module.22. When the “enable/disable” contacts are closed,the 24 VAC signal travels to pin 1 of the stage 1connection and waits for a CFH.23. When a CFH occurs, a 24 VAC signal is sent to theCFH light on the status panel located on the lowerleft front of the control compartment.