Page 43 (Secondary Heat Exchanger Panel)

HEIL NUGK - Secondary Heat Exchanger Panel

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Table of Contents

Table of Contents2
Condensing Gas Furnace Troubleshooting Chart5
Honeywell S8600M Module Troubleshooting Chart6
White Rodgers 50E/F47 Hot Surface Ignition System Chart 1 First Visual Check7
White Rodgers 50E/F47 Hot Surface Ignition System Chart 2 Second Visual Check8
White Rodgers 50E/F47 Hot Surface Ignition System Chart 3 Third Visual Check9
Hamilton Standard Intermittent Pilot Ignition System10
Gas and Electrical Supply11
Natural Gas11
LP Gas11
Electrical Power to Furnace11
Thermostats12
Location12
Checkout12
Heta Anticipators14
Transformer16
Voltage to Control Module (with Exhaust Blower Operating)16
Temperature Rise17
Check Temperature Rise17
Blower Removal18
Upflow Models Blower Assembly Removal18
Counterflow Models: Blower Assembly Removal19
Blower Wheel Removal (All)19
Blower Wheel Installation20
Blower Speed Taps20
Burners21
NUGK Series21
Gas Valve and Manifold Removal21
Remove Gas Valve and Manifold Assembly22
Inspection22
Nugs/Nuls Series23
Reassembly23
Primary Air Adjustment (ALL)25
Adjustment Procedures (NUGK Shown)25
Fan and Limit Controls27
Fan and Limit Control (Honeywell - Timed On, Temperature Terminated)27
How the Control Works27
Burned out Heater Element28
Limit Control Check28
Fan and Limit Control (Cam - Stat Timed - 0N) Temperature Terminated29
How Control Works29
Electronic Fan Control (Timed-On, Timed Off)29
Adjust Blower On/Off30
Checking for Defective Control31
Limit Switch31
Checking Limit Control31
Exhaust Limit Switch32
Rollout Limit Switch32
Gas Valves33
White Rodgers 36E3633
Honeywell VR8204A Gas Valves33
Checking Gas Pressure (Natural Gas)33
Checking Gas Pressure to Valve (LP Gas)34
Checking Gas Pressure (Direct Vent)34
Pressure Switches35
Exhaust Blower Pressure Switch35
NUGK Normal Operation35
Trouble Shooting35
NUGS Normal Operation36
NUGK and NUGS39
Heat Exchangers40
Cleaning And/Or Replacing Heat Exchangers40
Cleaning Secondary Heat Exchanger (Current Production) - Upflow Models40
Secondary Heat Exchanger Removal/Replacement - Upflow Models41
Secondary Heat Exchanger Panel43

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