Honeywell RM7838A Wiring Diagrams page 7

Specific instructions and footnotes for converting from
the Honeywell W124 Protectoglo Flame Safeguard to the
RM7838A. The footnotes will be designated with a letter in
a triangle (i.e., ) for specific footnotes or a number in a
A
triangle (i.e., ) for general footnotes from page 4.
1
1. The following components will be needed in addition
to the 7800 SERIES control.
• S445A Start-Stop Switch.
• Double pole/single throw switch (if alarm silenc-
ing is desired).
2. Wires that can be moved from the W124 subbase
terminals to the RM7838A subbase terminals are
shown in the tabs.
3. Locate, label and disconnect the hot supply wire
for the:
• alarm
• ignition transformer.
4. Remove and discard the following:
• Start/stop Switch (if it is not a S445A Start-Stop
Switch).
• Temperature controller (if used). Note if there was
a temperature controller, a line voltage tempera-
ture controller will have to be installed in series
with the burner control switch.
• Jumper wires (if used) that are between W124
terminals 2-11, 3-8, 4-9, L1-11, R-W-B, or
W-10.
• Any external purge timer (if used).
5. Connect the hot supply wire of the ignition trans-
former to terminal C of the S445 Start-
Stop Switch.
6. Note General Footnotes.
SPECIFIC FOOTNOTES:
A Install the High Fire Purge switch between Q7800
Subbase terminals 7 and 19. If no High Fire
Purge Switch is used then install a jumper wire
between Q7800 subbase terminals 7 and 14. Note
installing the jumper will add 30 seconds to the
purge timing.
B Connect the hot supply wire of the alarm through one
pole of the double pole/single throw alarm silencing
switch (if used) to Q7800 Subbase terminal 3.
C Connect terminal B of the S445A Start-Stop Switch
through the other pole of the double pole/single
throw alarm silencing switch (if used) to Q7800
Subbase terminal 6.
D Connect the limits of running interlocks (High Limit,
Pressure Switch, Combustion Air Switch and etc.)
in series with the burner switch and temperature
controller (if used). Connect this series string be-
tween L1 of the master switch and Q7800 Subbase
terminal 7.
F Connect the Low Fire Purge Switch and any starting
interlocks in series between Q7800 Subbase terminal
10 and terminal D of the S445 Start-Stop Switch.
G Connect Q7800 Subbase terminal 21 to terminal A of
the S445 Start-Stop Switch.
H If Dynamic Self Check has been selected for the
flame amplifier, then connect one of the shutter leads
(white) of the C7012E,F or C7076A,D Flame Detec-
tor to Q7800 Subbase terminal 22.
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