Installation - Honeywell C7061A1020 Product Handbook

INSTALLATION

CAUTION
1. lnstaller must be a trained, experienced flame
safeguard control serviceman.
2. Disconnect power supply before beginning
installation to prevent electrical shock and
equipment damage.
3. All wiring must comply with applicable local
electrical codes, ordinances and regulations.
4. Voltage and frequency of power supply
connected to this detector must agree with the
values marked on the detector.
6. On multiburner installation, each detector must
respond only to the flame(s) producted by the
burner it is supervising.
7. Do not connect more than two detectors in
parallel to a single R7061 or R7861A Dynamic
Self-Check Ultraviolet amplifier.
8. Perform all required adjustments and checkout
tests after installation is complete.
lnstall the Sight Pipe
After you have determined the location and sighting angle,
select the sight pipe. A black iron pipe with a diameter of at
least 1-1/2 in. (38.1 mm) is recommended. Do not use
stainless steel or galvanized pipe because they reflect
ultraviolet radiation internally and complicate aiming the pipe.
Sight pipes with diameters 2 to 3 in. (51 to 76 mm) produce
better results for horizontal rotary burners, which require wide
viewing angles. A wide viewing angle can also be obtained
by using a short sight pipe.
Fig. 5. Typical mounting of C7061A/F
Prepare Hole in Wall of Combustion Chamber
Cut or drill a hole of the proper diameter for the sight pipe in
the wall of the combustion chamber at the selected location.
Flare the hole to leave room for small adjustments of the
sighting angle. The taper of the hole should be about 1 in. for
every 3 in. (25 mm for every 76 mm) of Wall thickness.
EN1C-0015SZ20 R0602
Mount Sight Pipe
Thread one end of the pipe to fit the mounting flange, union,or
required coupling. Cut the pipe to the desired length (as short
as practical) and at an angle so it fits flush with the wall of
the combustion chamber. Tack weld the pipe to the wall in a
trial position. Do not weld the sight pipe permanently in place
until after completing the Adjuctments and Checkout.
lnstall Fittings
In some cases, the sight pipe does not directly fit the C7061A/
F mounting flange or union. Also, it may be desirable or
necessary to ventilate the sight pipe. You may also want to
use a swivel mount or an antivibration mount. Each of these
cases may require additional fittings.
Reducer
For sight pipes of larger diameter than the mounting flange
connector or union, install a reducer as illustrated in Fig. 5.
The reducer will require a close nipple with these external
threads: 3/4 or 1 inch. NPT.
Sight Pipe Ventilation
It may be necessary to ventilate the sight pipe to cool the
detector or to clear a viewing path through UV radiation
attenuating material.
For a negative pressure combustion chamber, drilling a few
holes in the section of the sight pipe outside of the
combustion chamber will allow air at atmospheric pressure
to flow through the sight pipe and into the chamber. A
perforated pipe nipple between the sight pipe and the
detector can also be used.
For a positive pressure combustion chamber, connect a
supply of pressurized air from the burner blower to flow
through the sight pipe and into the chamber. The air pressure
must be greater than the chamber pressure.
Swivel Mount (C7061A only)
To facilitate proper flame sighting, use part no. 118367A
Swivel Mount (not supplied). The swivel mount requires a
reducer of the proper size to mount it onto the sight pipe. It
also requires a one-inch close nipple for mounting to a C7061
with a one-inch connector. (For 118367A Swivel Mount
mounting details, refer to form 60-0361).
Antivibration Mount
The detector withstands normal burner vibration. If the
vibration is excessive, part no. 123539 Antivibration Mount
is available. (For mounting details, see form 60-0361). If you
use this mount, install it before positioning and sighting the
detector.
Mount the Detector
Mount the detector onto the sight pipe, reducer, or other
fitting. The C7061A/F Self-Checking flame detectors
incorporate an oscillating shutter mechanism and, therefore,
require special consideration for mounting positions other
than vertically sighting downward or upward, as illustrated
in Fig. 6. The C7061A/F has notch and arrow indicators (see
Fig. 7 and 9) on the faceplate to facilitate mounting in
positions other than those shown in Fig. 7. The notch and
arrow must be vertically aligned with the notch in the up
position and the arrow pointing downward (see Fig. 7). The
C7061A/F must be mounted with the conduit opening located
approximately 45 degrees below the horizontal (see Fig. 7).
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