, 8531, 8535 Technical Installation Manual ENGLISH, FRANCAIS Installation Maintenance excalibur 8531- iv parts breakdown - big discount - Atwood Furnace Parts . Excalibur 8531-IV Parts Breakdown. Stock No HYDRO FLAME RELAY: 9 32777: 1 MOTOR F/ 8525IV & 8531-IV: 27 31280: 1:...