Raypak HIDELTA 992B Installation & Operating Instructions Manual

Also see for HI DELTA 1262B: Specification sheet Installation & operating instructions Specifications Installation & operating instructions Brochure & specs

4149. When power is sent to gas valve 1 it is also sent totime delay relay 1 (TD-1) which starts a 5-secondcountdown.50. After the 5-second countdown from TD-1 and theinternal contacts close, time delay relay 2 (TD-2 )receives 24 VAC.51. Gas valve 1a is energized allowing the remainderof stage 1 to fire.52. After the 5-second countdown from TD-2 the inter-nal contacts close allowing 24 VAC to sit at pin 3of the stage 2 connection on the CPW board.53. After closure of the stage 2 contacts Gas valve 2is energized.54. The stage 2 LED on the status display board isnow illuminated.55. The temperature controller closes the stage 3 con-tacts at J3 on the CPW board.56. Power is applied to pin 5 of the stage 3 connec-tions on the CPW board.57. Power is applied to the “TH” terminal of ignitionmodule 2.58. Once the “TH” signal is received at ignition module2, the heater will perform a 15-second pre-purge,and then hot surface igniter 2 is energized by a120 VAC signal from S-1 on ignition module 2 forapproximately 30 seconds. (The hot surface ignit-er must draw greater than 3.1 amps while beingenergized or ignition lockout will occur after threetries.)59. If ignition module two locks out, a signal will besent to the Universal Diagnostics Board and to thestatus display board to indicate an ignition fault.60. Once the ignition module determines that the hotsurface igniter has heated up and operating prop-erly, a 24 VAC signal is output from pin GV on themodule.61. 24 VAC signal is received at gas valve 3 thus ener-gizing it.62. The stage 3 LED on the status display board isnow illuminated.63. The coil of relay K-5 (N.O.) is now energized withthe (K-5) contacts closing downstream of thestage 4 connections.64. Remote flame sensor 2 is trying to rectify flame.65. Power is now applied to time delay relay 3 and thecontacts of TD-3 located upstream of the stage 4connection close after 5 seconds.66. The stage 4 controller contacts close.67. Power is applied to gas valve 4.68. The stage 4 LED on the status display board isnow illuminated.69. The heater is now operating at full fire.