R4140G, L AND M FLAME SAFEGUARD PROGRAMMING CONTROLS
60-0770—2
19
3. Part no. 196146 Meter Connector Plug or equivalent.
4. 123514A Flame Simulator—for use with R7247A
Rectification Flame Signal Amplifiers (green).
5. 123514B Flame Simulator for use with R7249A
Ultraviolet Flame Signal Amplifiers (purple).
6. Jumper wires (2) of No. 14 wire, insulated, 12 in.
(304.8 mm) long, with alligator clips at both ends.
7. Shorting wire 10 in. (254.0 mm) long, insulated, with
3/4 in. (19.1 mm) of insulation removed from each end;
for simulating flame with an R7248A Infrared Flame
Signal Amplifier (red).
8. Watch or clock with second hand.
9. Manometer (or pressure gauge) to measure pilot gas
pressure.
10. Thermometer or thermocouple to measure temperature
at the flame detector.
11. Orifice plates (aperture disks) or filters, as necessary, to
adjust sensitivity of flame detector(s).
Preliminary Check (Fig. 11)
Open the master switch before performing this check.
Eliminate the possibility of trouble being caused by poor
contact of the spring connectors on the back of the
programmer. Ensure that they are properly aligned and have
the proper tension. They should be tight enough so that it is
necessary to force a dime between the contacts. If a dime
slips through, gently press the connector together with your
finger tips—do not use pliers.
Troubleshooting Procedures
Refer to the Step-By-Step Operation for the appropriate
R4140 model in the Operation section of the R4140G,L or M
Specifications. Observe the operation carefully to determine
the point where the trouble occurs. Then refer to Table 5 and
follow the troubleshooting procedure(s) outlined.
Refer to Fig. 15, 16, and 17 for location of relay and timer
contacts. Access to the contacts can be gained by removing
the relay/timer cover (Fig. 4).
Fig. 11. Adjusting spring connectors.
IMPORTANT
a. Blackened M4A, M6B, M8B, M9B, or M11B timer
contacts are due to normal deposits of impurities
caused by breaking an inductive load (ignition
transformer). Tests on returned programmers have
shown that the deposits are not heavy enough to
cause ignition failure. Determine exactly at what
point in the operating sequence the trouble occurs
and carefully follow the applicable troubleshooting
procedure.
b. Before you reset the lockout switch, wait at least
one minute to allow the heater to cool.
c. If, after completing an applicable troubleshooting
procedure, proper operation still cannot be
obtained, replace the programmer (except the
amplifier, unless noted).
d. At the completion of troubleshooting, be sure to
perform all applicable tests in the Checkout section
of these instructions.
Table 5. Troubleshooting Chart.
(Continued)
NORMAL SPACING
SHOULD BE LESS
THAN THICKNESS
OF DIME
M7960
Symptom
Test
Possible Cause/Correction
A. On a call for heat,
1. Check Lockout switch.
1. If Lockout switch is popped out, reset it.
programmer will not start.
(Relay 1K does not pull in.)
2. Check relay 2K.
2. If relay 2K is holding in, perform the Flame
Relay (2K) Hold-In Check immediately
following this table.
3. Check the timer dial to make sure the timer
is at the START position.
3. If the large dot between PURGE and
PREPURGE is not at the index notch
(Fig. 9), turn the dial in the direction shown
by the arrow on the relay/ timer cover until
the dot is at the index notch. (The
R4140L1030 timer cannot be rotated
manually.)