Natco ANSI Z 21.10.3, Service Manual

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VERY IMPORTANT SET-UP INSTRUCTIONS!
IF YOU HAVE A COMBUSTION ANALYZER, THE FOLLOWING RATINGS WILL BE VERY HELPFUL IN SETTING UP
YOUR SUPER-E:
FOR NATURAL GAS - CO2 READING SHOULD BE BETWEEN 9 ½% & 10 ½%
O2 READING SHOULD BE BETWEEN 3 ½% & 4 ½%
CO READING SHOULD BE UNDER 10 PPM
FOR PROPANE GAS - CO2 READING SHOULD BE BETWEEN 10 ½% & 11 ½%
O2 READING SHOULD BE BETWEEN 3 ½% & 4 ½%
CO READING SHOULD BE UNDER 10 PPM
90,000 BTU SUPER-E’S- GAS ORIFICE SIZES-
AIR ORIFICE = 1.000" NATURAL GAS = .261" PROPANE/LP GAS = .205"
NATURAL GAS CONVERSION FROM PROPANE/LP = .253"
PROPANE/LP GAS CONVERSION FROM NATURAL GAS = .215"
CAUTION:
THERE ARE NO USER SERVICEABLE PARTS WITHIN THE CONTROL SYSTEM. TO MAINTAIN SAFETY AND PROPER APPLI-
ANCE PERFORMANCE, REFER ALL TROUBLE-SHOOTING TO QUALIFIED SERVICE PERSONNEL.
TROUBLE-SHOOTING
The appliance controller has many inherent diagnostic and fault detection routines built into its operating software and hardware.
These routines, along with the three digit LED display and nine LED status indicators present on the display panel, can greatly assist
the service person in quickly pinpointing the source of problems that may occur with the appliance. In certain circumstances, multiple
LED’s may be lit or flashing to better pinpoint the problem. Also, there is a green LED on the main control board to indicate proper
polarity and grounding. The following charts, diagrams, and information can be used during
troubleshooting procedures:
LED CONTROLLER FUNCTION MEANING
LINE MONITORS INCOMING AC LINE VOLTAGE “ON” WHEN LINE VOLTAGE IS PRESENT
BLOWER MONITORS THE BLOWER MOTOR OUTPUT “ON” WHEN OUTPUT IS ENERGIZED
(POWER APPLIED TO BLOWER)
IGNITOR MONITORS IGNITOR ELEMENT OUTPUT “ON” WHEN OUTPUT IS ENERGIZED
(POWER APPLIED TO IGNITOR)
24V MONITORS INCOMING VOLTAGE FROM THE “ON” WHEN SECONDARY VOLTAGE IS PRESENT
TRANSFORMER SECONDARY
ECO MONITORS STATE OF THE ECO SWITCH “ON” WHEN ECO SWITCH AND LOW WATER CUT-OFF
AND LOW WATER CUT-OFF IS IN CLOSED POSITION (NORMAL POSITION)
PRESSURE MONITORS STATE OF THE AIR SWITCH “ON” WHEN THE PRESSURE SWITCH IS CLOSED
(SUFFICIENT COMBUSTION AIRFLOW EXISTS)
GAS VALVE MONITORS THE GAS VALVE OUTPUT “ON” WHEN OUTPUT IS ENERGIZED
(POWER APPLIED TO GAS VALVE)
WATER TEMP. MONITORS WATER TEMP. WITHIN TANK “ON” WHEN TEMP. DROPS BELOW SET POINT
CONTROL MONITORS INTERNAL STATE OF THE “ON” WHEN CONTROLLER FUNCTIONALITY IS O.K.
HEALTH CONTROLLER’S HARDWARE AND SOFTWARE
GREEN ON MONITORS POLARITY AND GROUND CIRCUIT “ON” WHEN GROUND AND POLARITY ARE O.K.
MAIN CONTROL
BOARD