Checkout - Honeywell R7795A Manual

!
CAUTION
CLIPPING THE JUMPER WIRE(S) TO
SELECT ONE OR BOTH OF THE FOL-
LOWING OPTIONS IS NONREVERSIBLE:
1. Four-second pilot flame trial (clip orange
jumper, see Fig. 9).
2. Lockout on loss of flame (clip yellow jumper
wire, see Fig. 9).
NOTE: To prevent the ends of the clipped jumper wire
from touching each other, make sure that the jumper is
clipped in two places. To prevent internal electrical
shorts do not allow the clipped portion of the jumper
to fall into the R7795.
!
WARNING
IF FUEL ENTERS THE COMBUSTION
CHAMBER FOR MORE THAN A FEW
SECONDS WITHOUT IGNITING, AN
EXPLOSIVE MIXTURE COULD
RESULT. THE FOLLOWING TIME
LIMITS ARE RECOMMENDED:
Trial for PILOT: 10 seconds.
Trial for MAIN FLAME: 5 seconds.
In any case, DO NOT EXCEED THE MANU-
FACTURER'S SPECIFIED NORMAL LIGHT-
OFF TIME. Close the manual main fuel shutoff
valves if the flame is not burning at the end of the
specified time.
!
CAUTION
1. Use the utmost care when checking the system.
Line voltage is present on most terminals when
power is on.
2. Open the master switch before installing or
removing the R7795 on the subbase, before
installing or removing any jumpers, or before
making any adjustments.
3. Make sure all manual fuel shutoff valves are
closed before starting the Initial Lightoff Check
or the Pilot Turndown Test.
4. If the low fuel pressure limits are bypassed for
any of the tests, make sure that the jumpers are
removed before putting the system into operation.
5. Do not put the system into operation until you
have satisfactorily completed all applicable
Checkout tests in this section and any others
required by the burner manufacturer.
Fig. 9—Location of R7795 jumpers.
EQUIPMENT REQUIRED
Voltmeter (Honeywell W136A or equivalent) with 0 to
300 Vac scale.
Microammeter (Honeywell W136A or equivalent) with
0 to 25 microamp range and SPL scale with damping.
Meter Connector Plug part no. 196146 or equivalent.
Jumper wires (2) No. 14 wire, insulated, 12 in. [304.8 mm]
long, with insulated alligator clips at both ends.
Manometer (or pressure gauge) to measure pilot gas
pressure.
Thermometer or thermocouple to measure temperatures
at the flame detector.
CHECKOUT SUMMARY
The following list summarizes the checkout tests re-
quired for each type of installation. Instructions for each
test are included in this section; also consult the burner
Installation instructions.
• Preliminary inspection—all installations.
• Flame signal measurement—all installations.
• Initial lightoff check for proved pilot—all installa-
tions using proved pilot.
• Initial lightoff check for direct spark ignition of oil-
oil burners not using a pilot.
• Pilot turndown test—all installations using a pilot.
• Ignition interference test—all installations using a
flame rod.
• Hot refractory hold-in test—all installations using a
rectifying photocell.
• Ultraviolet response test—all installations using ul-
traviolet flame detectors.
• Flame signal with hot combustion chamber—all
installations.
• Safety shutdown tests—all installations.
Refer to Figs. 7 and 8 for terminal locations, and to
Figs. 1 and 9 for the location of component parts. Remove
the device cover by loosening the screw.
11
R7795A,B,C,D

CHECKOUT

Checkout
66-2001—2