Special Considerations For A C7012E Or F; Using Redundant Parallel C7012E Or F Detectors; Equipment Required; General Instructions - Honeywell R4140G Installation Instructions Manual

R4140G, L AND M FLAME SAFEGUARD PROGRAMMING CONTROLS

Special Considerations for a C7012E or F

The R4140 provides two sources of power for a C7012E or F
Purple Peeper Ultraviolet Flame Detector (with self-checking
shutter). The power to the black leadwires of a C7012E can
be 120V, 208V, 220V, or 240 Vac, depending on the model of
the detector. The C7012F is available only in a 120V model.
This voltage must match the power supply of the R4140.
The power to the white leadwires must be 120 Vac; this is the
power supply for the operation of the self-checking shutter.
The 120V for the shutter is applied automatically at terminal
17 of the R4140 through switching action within the plug-in
R7247C Flame Signal Amplifier.

Using Redundant Parallel C7012E or F Detectors

For a flame that is difficult to sight, using two parallel C7012E
or F Flame Detectors reduces nuisance shutdowns. If only
one of the parallel detectors loses the flame signal, the other
continues to indicate the presence of the flame and keeps the
burner running. A flame simulating failure in either detector
causes the burner to shut down. Two C7012E detectors can
be wired in parallel to the same terminals on any R4140 (if
the voltage ratings match). Two C7012F Detectors can be
wired in parallel only on 120V models. To avoid exceeding the
rating of the solid state shutter switch in the R7247C Flame
Signal Amplifier, do not connect more than two C7012E or F
Detectors in parallel.
Static Checkout (See Table 2)
WARNING
1. Use extreme care while performing these tests;
line voltage is present on most subbase terminals
when power is on.
2. Open the master switch before installing or
removing a test jumper.
3. Be sure to remove the test jumper(s) after
completing each test before continuing to the
next test.
4. Replace all external devices not operating
properly. Do not bypass external devices.
5. Close all manual fuel shutoff valves before
starting these tests.
Test R4140 Test
No. Models Jumpers Voltmeter
WARNING
Make sure all manual fuel shutoff valves are closed.
1 All models None
2 Models with None
Preignition
Interlocks
Models with None
Start
Interlocks
60-0770—2
Table 2. Static Tests of External Devices.
Normal
Operation
L1-L2 Line voltage at terminal L1.
4-L2 Line voltage at terminal 4.
16-L2 Line voltage at terminal 16.
After checking all wiring circuits, perform this checkout before
installing the programmer on the subbase. These tests
ensure that the Q520A Wiring Subbase is wired correctly, and
that the external controllers, limits, interlocks, actuators,
valves, transformers, motors, and other devices are operating
properly.

Equipment Required

1. Voltmeter (W136A or equivalent) set on 0 to 300 Vac
scale.
2. Jumper wires (2) of No. 14 wire, insulated, 12 in.
(304.8 mm) long, with alligator clips at both ends.

General Instructions

Perform all applicable tests in Table 2, in the order
listed.
Make sure all manual fuel shutoff valves are closed.
Perform only those tests designated for the specific
programmer model being tested.
Raise the setpoint of the burner controller to simulate a
call for heat.
For each test, open the master switch and install the
jumper wire(s) between the subbase wiring terminals
listed in the Test Jumpers column.
Close the master switch before observing operation.
Read the voltage between the subbase wiring terminals
listed in the Voltmeter column.
If there is no voltage or if operation is abnormal, check
the circuits and external devices as described in the
last column.
Check all wiring in the circuits for correct connections,
tight terminal screws, correct wire, and proper wiring
techniques. Replace all worn or incorrectly sized wires.
Replace faulty controllers, limits, interlocks, actuators,
valves, transformers, motors, and other devices, as
required.
Normal operation must be obtained for each required
test before continuing the checkout.
Be sure to remove the test jumper(s) after completing
each test before continuing on to the next test.
If Operation is Abnormal,
Check the Items Listed Below
1. Master switch is closed.
2. Power is connected to the master switch.
3. OverIoad protection (fuse, circuit breaker
etc.) has not opened the power line.
IMPORTANT
Low fuel pressure limits, if used, could be
open. Bypass them with jumpers for the
remaining Static Tests (if required).
1. Limits are closed. If open, determine
cause(s) and correct the condition(s).
2. Burner controller contacts are closed (call for
heat).
4
(Continued)