Honeywell Q179B 사용자 설명서

5

60-2032—4

Use high tension wire, of a type found acceptable by a 

nationally recognized testing agency, for the wiring to the 

ignition electrode (Q179A). High tension wires should be rated 

electrically equivalent to type GTO-10 and should have 

temperature and humidity characteristics adequate for the 

application. If the ignition lead is exposed to temperatures 

above 125°F (52°C), use Honeywell R1061012 Ignition Cable 

rated at 350°F (177°C) or equivalent. For ignition installations 

in a contaminated environment, use Honeywell R1239001 

High Tension Cable rated at 220°F (104°C) or equivalent.

For wiring between the F terminal of the relay and the flame 

electrode, use wire with moisture-resistant insulation. Number 

14 single-conductor TW wire is adequate; however, those 

portions of the leadwire exposed to temperatures over 125°F 

(52°C) should also be heat resistant. For both heat and 

moisture-resistant applications, use part no. R1298020 Flame 

Rod Leadwire rated at 400°F (204°C) continuous duty or 

equivalent.

Run a ground wire from the pilot burner to the relay to assure a 

continuous, unchanging ground.

For detailed wiring diagrams, see the Instructions packed with 

the flame safeguard control.

The proper pilot burner orifice must be selected for the gas 

being used (natural, LP gas) so that the pilot burns with a 

medium hard flame. This type of flame provides the maximum 

flame signal.

The flame safeguard control relay will chatter if excess 

secondary air velocity or a severe draft condition causes the 

pilot flame to make intermittent contact with the flame electrode 

(rod) or grounding bracket.

The performance of the pilot assembly can be determined by 

measuring the flame signal developed with the pilot operating. 

The flame signal (current/voltage) measurement requires the 

use of an appropriate volt-ohmmeter.

Most existing Honeywell Flame Safeguard Controls 

incorporate a flame current jack in the control plug-in amplifier 

or in the control itself. The flame current measurement can be 

made with a Honeywell W136A Test Meter, which has a 0 to 25 

microampere dc scale (see Fig. 4). With the W136A selector 

switch positioned to the 0 to 25 microampere scale, connect 

the meter leads to the two ends of the meter connector plug, 

positive (red, +) to positive, negative (black, -) to negative. The 

Meter Connector Plug part no. 196146 is provided with the 

W136A Meter. If a W136A Meter or connector plug is not 

available, a dc ammeter with a 0 to 25 microampere scale can 

be wired in series with the F lead of the flame detector circuit. 

A minimum flame current of 2.0 microamperes is considered 

acceptable.

The Honeywell BCS 7700 and 7800 SERIES Flame Safeguard 

Control flame signals are measured in dc volts. A 20,000 volt/

ohm meter with a 0 to 5 or 10 Vdc scale is recommended for 

measuring the flame signal of BCS 7700 controls while a one 

megohm/volt meter is recommended for 7800 SERIES 

controls. The flame signal voltages are measured as illustrated 

in Fig. 5 and 6.

The minimum acceptable flame signal voltage for the BCS 

7700 controls is 2.2 Vdc (maximum expected is 4.98 Vdc).

The minimum acceptable flame signal voltage for the 7800 

SERIES controls is 1.25 Vdc (maximum expected is 5.0 Vdc).

If the flame signal is less than the minimum acceptable for the 

Honeywell Flame Safeguard Control used, adjust the flame 

electrode (rod) to increase the flame signal to at least the 

minimum acceptable level by loosening the clamp screw and 

turning the electrode (rod) slightly to the right or left as 

required. After the flame electrode (rod) is adjusted, check the 

gap between the ignition electrode and burner tip (Q179A). 

The gap must be between 1/16 and 3/32 inch.

Perform the pilot turndown test as described in the Flame 

Safeguard Control Instructions to ensure the pilot flame is 

adequate to ignite the main burner.

If the flame rod is used to prove a pilot flame before the main 

fuel valve(s) can be opened, perform a pilot turndown test. 

Follow the procedures in the Instructions for the appropriate 

Flame Safeguard Control, and in the burner manufacturer’s 

instructions.

W136A VOLT- 

OHMMETER 

W136A SELECTOR 

SWITCH 

196146 METER 

CONNECTOR 

PLUG 

PLUG 

FLAME SIGNAL 

METER JACK 

PLUG-IN FLAME 

SIGNAL AMPLIFIER 

RED CONNECTOR 

BLACK CONNECTOR 

BLACK (–) METER LEAD

RED (+) 

METER 

LEAD 

M6532A