Product Overview

Replaceable Fuse

The programmer modules are designed with a field replaceable fuse. The fuse is located on the

printed circuit board below the cover. The fuse will blow as a result of an overload condition on Ter-

minals 3, 4 or 5. To replace the fuse, remove power from the system. Remove the programmer mod-

ule and using a small screwdriver or similar tool , remove the fuse from its holder. Install a Fireye

replacement fuse (P/N 23-176) or equivalent 8 amp fuse (e.g. Littlefuse 12AG, 8 amp, 125V). FOR

MP100E OR MP102E, ORDER FIREYE REPLACEMENT FUSE (P/N 23-183 OR EQUIVALENT

3.5 AMP FUSE (E.G. LITTLEFUSE 2203.5, 3.5 AMP, 250V).

WARNING: Remove power from the control before proceeding.

INSTALLATION - UV SCANNERS

Where possible, obtain the burner manufacturer’s instructions for mounting the scanner. This infor-

mation is available for most standard burners. The scanner mounting should comply with the follow-

ing general instructions:

1. Locate the scanner within 30 inches of the flame to be monitored, closer if possible.

2. Select a scanner location that will remain within the ambient temperature limits of the UV-eye

scanner (200q F/93q C). If cooling is required, use (a) an insulating coupling (Fireye P/N 35-69)

to reduce conducted heat; (b) a window coupling (Fireye P/N 60-1257) to seal off furnace or

burner pressure; (c) cooling air to reduce the scanner sight pipe temperature.

3. Mount rigidly a short length (4sto 8s) of

sor

sblack iron pipe in a position that permits an

unobstructed view of the pilot and/or main flame.

CAUTION: The scanner must not sight the ignition spark directly, or any part of the burner

that can reflect the spark back to the scanner.

4. The maximum UV signal from a flame is found in the first one-third of the visible flame taken

from the point where the flame begins. The scanner sight pipe should be aimed at this area.

5. A correct scanner application will not see a pilot flame that is too small to ignite the main flame

reliably. Note particularly the test for minimum pilot that is described on page 22.

6. On installations having negative pressure combustion chambers, a small hole (

s or

)

drilled in the sight pipe will assist in keeping the pipe clean and free from smoke.

7. Two scanners may be installed on one burner if it is necessary to view two areas to obtain reli-

able detection of the flame. They should be wired in parallel.

8. The UV-eye scanner is designed to seal off the sight pipe up to pressures of 1 PSI when the scan-

ner lock nut is firmly tightened. Pressures in excess of 1 PSI should be blocked from the scanner.

A quartz lens coupling (P/N 60-1290) or quartz window coupling (P/N 60-1257) may be used.

Each is rated from -3 to +100 PSI max.

9. To increase scanner sensitivity, a quartz lens coupling (P/N 60-1290) may be used. The quartz

lens permits location of the UV-eye twice the distance noted in Item 1. Use

s

snipple

between UV1A scanner and union. Use

sclose nipple and

sby

sbushing on UV-2 appli-

cations.