Honeywell C7015A Manual Do Utilizador

INSTALLATION

CLEARANCE

Make sure there will be enough mom to easily mount the

sight pipe, flame detector, and all required accessories, and to

remove th e 

flame detecto r for troubleshooting and servicing.

INSTALLING THE SIGHT PIPE

Thelocationofthesightpipeisthemostcriticalpartofthe

installation. A 

 in. black iron sight pipe is recommended.

Do 

 

 a stainless steel or galvanized pipe because its

internal surface blackens with use as deposits from the
combustion chamber accumulate on it. Initially, its shiny
intemalsurfacereflectsinharedradiation, whichcouldresult

in a satisfactory flame signal even though the pipe may be

improperly located. As it blackens, less 

 radiation is

reflected and the 

 signal becomes marginal.

Because no two situations 

 the same, the length and

sighting angle of the pipe must be determined at the time and

placeofinstallation.Generally,itisdesirabletohavethesight

pipe tilting downward to prevent soot or dirt buildup.

PREPARE HOLE IN WALL OF COMBUSTION

CHAMBER

Form a hole of the proper diameter for the sight pipe in the

hole (Fig. 9) to leave room for small adjustments of the

sighting angle. The taper of the hole should be about 1 in. for
every 3 in. 

 mm for every 76.2 mm] of wall thickness.

INSTALLING ACCESSORIES

It may be necessary or desirable to install accessories

between the sight pipe and the detector. This section 

scribes the installation of these accessories.

SIGHT PIPE VENTILATION

 may be necessary to ventilate the sight pipe to cool the

detector.

For a negative pressure combustion chamber, drilling a

few holes in 

 section of the sight pipe outside of the

combustion chamber allows air at atmospheric pressure to
flow through the sight pipe into the chamber. A perforated
pipe nipple between the sight pipe and the flame detector can
also be used. See Fig. 7.

For a positive pressure combustion chamber, connect a

supply of pressurized air from the burner blower to flow
throughthesightpipeintothechamber.Theairpressuremust

be greater than the chamber pressure.

cooling.

mounting details, refer to form 60-0361 for the 118367A
Swivel Mount)

REDUCER BUSHING

To mount the detector on a 

 in. sight pipe, 

install a

 Reducer Bushing (Fig. 1).

 PLATE

To reduce the detector field-of-view, and restrict it to the

intersection of the pilot and main flame, or to a small area of
hotrefractory (see Fig.   install a 105 134 Orifice Plate. The

 plate can be inserted into a standard 

 in. pipe

coupling (Fig. 1) or into the seal-off adapter, if used.

MOUNTING SIGHT PIPE

Thmadoneendofthepipetofitthemountingcollaronthe

detector (or an accessory, if used, see Fig. 1). Cut the pipe to

the desired length (as 

 

 practical). T o 

Tack weld 

 pipe to the wall in a trial position (Fig. 9)

. 

NOTE: If you use a Swivel Mount (part no. 

 and

yo u 

about the location and sighting angle, you

can permanently weld the pipe.

PIPE NIPPLE

A   in. pipe nipple, 6 to 8 in.   152 to 203 mm] long, can

be inserted between the sight pipe and the 

 Mount

(Fig.   to help cool the lead 

 cell. Usin g 

pip e 

nipple

will also reduce the viewing area of the detector, see Table 2

or 3).

SEAL-OFF ADAPTER

To protect 

 detector from hot gases, install a 105 172A

Seal-Off Adapter (Fig. 1). The adapter has a glass window
that prevents hot gases from reaching the lead sulfide 

cell.

HEAT BLOCK

To insulate the detector from sight pipe temperatures

above 125” F 

 

 install a 105061 Heat Block (Fig. 1).

The device is made of nonheat-conductive, laminated plastic
that prevents heat 

 being conducted from the sight pipe

to the detector. It can withstand temperatures up to 250” F

 

MOUNTING THE DETECTOR

Before mounting the 

 install the lead sulfide

photocell (if not installed already).

Unscrew the bushing from the cap, plu

g 

the photocel l into

cell mount, and screw the bushing back into the cap (Fig.

8). The bushing also includes a 

 lens to 

available radiation on the photocell face.

Mount the 

 Detector onto the sight pipe, heat

block, orotheraccessory (Figs. 1 and 9). Screw the mounting

collar onto the sight pipe or accessory.

SWIVEL MOUNT

To facilitate flame sighting, a Swivel Mount (part no.

 is available. The Swivel Mount requires a reducer

of the proper size to mount it onto the sight pipe. (For

8