User Guide

ManualsBrandsHoneywell ManualsGas Valves & ControlsEnvelope Assembly w/ Flame Current Test Kit

Table Of Contents

® U.S. Registered Trademark

CHECKOUT AND TEST

69- 1180- 1

Measuring SmartValve® System

Flame Current

GENERAL

This Honeywell SmartValve

System flame current kit

allows the trained service technician to determine the

flame current levels being generated in a SmartValve

System-equipped gas-fired appliance. Knowing the

strength and stability of the flame current signal being

generated by the appliance can help the technician

diagnose intermittent appliance operation and predict

future appliance problems.

Many factors influence the flame current being generated

by an installed appliance. The ignition control generates

an ac voltage potential between the flame sense rod and

the burner ground area. When flame is present, the

geometry of the flame rod/ground area combines with the

voltage potential present to generate a low-level

(microamperes) rectified dc current. The ignition control

monitors this current to determine of sufficient flame is

present to operate the appliance. If the appliance does

not generate sufficient flame current, the main burner will

not operate and the appliance will not deliver heat. If the

flame current generated is unstable and fluctuates, there

is high likelihood for inconsistent appliance operation.

The service technician must insure that the appliance

generates a strong and steady flame current well above

the minimum threshold to assure reliable appliance

operation.

Honeywell SmartValve Systems are available with two

types of ignition sequences:

• Intermittent pilot models use a low voltage hot surface

ignition (HSI) element to light the pilot gas; main

burner gas flows and the main burner lights when the

pilot flame is sensed.

• Direct hot surface ignition models use a 120 volt hot

surface ignition element to directly light main burner

gas; if the main flame is sensed at the end of the trial

for ignition, the main burner continues to fire.

This kit is suitable for measuring flame current on both

types of systems. Select the proper procedure, below,

based on the type of SmartValve System in the

appliance.

KIT CONTENTS

This kit contains:

1. Test harness to be inserted between the

SmartValve valve and the pilot burner or HSI

element/flame rod harness.

2. Signal converter to allow measurement of the

flame current in dc millivolts using a digital

multimeter set to the dc millivolt scale.

3. These instructions showing how to use the kit and

what flame currents are appropriate for appliances

using specific SmartValve System models.

Additional Equipment Needed:

1. Analog dc microammeter, 0 to 10 microampere

range, resolution to 0.01 microampere.

2. Digital volt-ohmmeter with dc millivolt scale.

Summary of content (8 pages)

PAGE 1
Measuring SmartValve® System Flame Current CHECKOUT AND TEST GENERAL This Honeywell SmartValve® System flame current kit allows the trained service technician to determine the flame current levels being generated in a SmartValve System-equipped gas-fired appliance. Knowing the strength and stability of the flame current signal being generated by the appliance can help the technician diagnose intermittent appliance operation and predict future appliance problems.
PAGE 2
FLAME CURRENT MEASURING PILOT BURNER FLAME CURRENT ON INTERMITTENT PILOT SMARTVALVE® SYSTEMS 1. 2. 3. NOTE: The signal converter is not polarity sensitive. 4. Models Included Intermittent Pilot SmartValve Systems include: SV9401, SV9402, SV9403, SV9501, SV9502, SV9503, SV9601, SV9602, SV9440, SV9540, SV9541 and SV9640. When Testing with this Kit… 1. 2. 3. 4. Disconnect all power to the appliance. Connect the signal converter to the voltmeter. Set the voltmeter to read dc millivolts. 5. 6. 7.
PAGE 3
FLAME CURRENT Table 1. SmartValve Intermittent Pilot Flame Current. SmartValve Model Meter Reading System Status Recommended Action SV9500/SV9600 Less than 0.12 uA or Pilot lit, main valve not Check for the following: less than 12 mV. pulled in (listen for • Low gas pressure. click when pilot lights). • Flame rod contamination. • Poor flame current path (including pilot tubing). • Pilot flame blown away from rod. See footnote a. More than 0.
PAGE 4
FLAME CURRENT MEASURING MAIN BURNER FLAME CURRENT ON 120 VOLT HOT SURFACE IGNITION SMARTVALVE® SYSTEMS Direct Measurement NOTE:Direct measurement requires an analog dc micro-ammeter capable of reading to 0.01 microampere accuracy. No signal converter required. WARNING Electrical Shock Hazard. Can cause serious injury, death or property damage. All direct ignition, hot surface ignition (HSI) SmartValve Systems have line voltage (120 Vac) present while the hot surface element is powered.
PAGE 5
FLAME CURRENT DIGITAL VOLTMETER SIGNAL CONVERTER TEST HARNESS V COM M21021 Fig. 3. Test harness connected to adapter and digital voltmeter. Table 2. Hot Surface Ignition (HSI) SmartValve System Flame Current. SmartValve Model SV9410, SV9420, SV9510, SV9520, SV9610, SV9620 Meter Reading (10 seconds after main flame lights) System Status Recommended Action None Main flame does not light during trial for ignition. Check for the following: • Gas supply off or low inlet gas pressure.
PAGE 6
9-1180—1 6
PAGE 7
69-1180—1
PAGE 8
Home and Building Control Home and Building Control Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 69-1180—1 G.R. Rev. 11-01 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. www.honeywell.