Honeywell C7061M Product Data page 11

MOUNTING
NUT
TUBE
UNIT
FLANGE
UNIT
TUBE UNIT
FIXING SCREW
CABLE
GUIDE
Fig. 9. Replacing ultraviolet radiation sensing tube.
9. Tighten 2 tube unit fixing screws removed during Step 4.
10. Make sure that the O-ring is not disengaged from the
flange unit.
11. Secure the cover with 4 cover mounting screws.
NOTES:
1. After replacing the ultraviolet sensing tube, be sure
to carefully mount the O-ring on the flange unit
before reattaching the cover. Otherwise the UV
sensor will not be properly sealed.
2. Tighten the terminal screws and mounting screws
with a tightening torque of 6 in.-lbs.
C7061M MINIATURE DYNAMIC SELF-CHECK ULTRAVIOLET FLAME DETECTOR
COVER
MOUNTING
SCREWS (4)
M29136A
Operation check
1. Mount the C7061M on the monitoring pipe
2. Turn on the power.
3. Start the combustion of the burner.
4. Measure the flame voltage at the Flame Amplifier.
Recommended flame
voltage
Stable 1.25Vdc or more.
(The flame voltage may
fluctuate with the shutter
operation of this unit.)
NOTE: If the flame voltage exceeds 4.5Vdc, limit the
quantity of ultraviolet rays with an orifice ring or
the like. If there is too much ultraviolet radiation, it
can penetrate the tube unit even when the shutter
is closed, causing faulty operation.
Inspection and Adjustment
After replacing the UV sensing tube, perform a pilot turndown
test, an ignition spark response test and a safety shutoff test to
verify proper functioning of the tube unit.
IMPORTANT
Do not put the system into operation until all Checkout tests in
the Instructions for the appropriate flame safeguard control and
any others specified in the burner installation instructions are
satisfactorily completed.
11
Table 2.
Inspection
item
• The flame is monitored
correctly.
• The light-receiving lens
of this unit is not dirty.
• No soot or other foreign
matter has accumulated
in the monitoring pipe.
65-0304—05