R7140G,L,M BURNER CONTROL MODULES
766-1153—03
Location

Humidity

Install the relay module where the relative humidity never
reaches the saturation point. The relay module is designed to
operate in a maximum 85 percent relative humidity
continuous, noncondensing moisture environment.
Condensing moisture may cause a safety shutdown.

Vibration

Do not install the relay module where it could be subjected to
vibration in excess of 0.5G continuous maximum vibration.

Weather

The relay module is not designed to be weathertight.
When installed outdoors, protect the relay module using an
approved weathertight enclosure.
Final Wiring Check
1. Check the power supply circuit. The voltage and
frequency tolerance must match those of the R7140. A
separate power supply circuit may be required for the
R7140. Add the required disconnect means and
overload protection.
2. Check all wiring circuits and complete the Static
Checkout, Table 8, before installing the R7140 on the
subbase.
3. Install all electrical connectors.
4. Restore power to the panel.

Service Notes:

Per industry standards, a conduit seal or a cable type that is
sealed is required to be installed in a device that can result in
flammable gas or flammable liquid flow through a conduit or
cable to an electrical ignition source in the event of a seal
leakage or diaphragm failure. This could be on the gas valves,
or gas or oil pressure regulators.
Check the Q520 Wiring Subbase terminals against the typical
wiring drawings, Figures 7, 8, 12, 13, 17, or 18.
If wires are attached to terminals that are unused in the
figures, DO NOT INSTALL THE R7140 until you have
identified the connections’ functions. Most likely the old
subbase terminals were used as tie points, so removing the
wires, capping with a wire nut, and tucking the wire down into
the subbase is all that needs to be done.
Make sure the wiring subbase of the old device is a
20-terminal Q520 (four rows of 5 terminals).
Make sure the system Controller is connected to the correct
terminal on the Q520 wiring subbase. It may be in a wire nut
tucked into the subbase. It needs to be connected to a
terminal (like terminal 4 or 16).
Make sure there is an electrical service ground wire
connection to the G terminal in the wiring subbase.
R4140G or BC7000 with PM720G replacement.
— If the application was a dual burner ignition, check the
Q520 subbase for a jumper between terminals 6 to 7,
discard the jumper and move the main valve connec-
tion (terminal 7) to terminal 6.
Replacing GP201 or GP301 devices:
— High Fire (or Purge Rate) Switch may be connected to
terminal D.
— Identify, remove, and connect to terminal M.
Replacing GP101 devices:
— Check wiring subbase. If D is jumpered to 8, remove
the jumper.
Replacing R4140 programmers on Carlin 1050 and 1150
burners:
— Remove jumper from 6 to 7.
— Remove jumper from L2 to 12 and wire nut the wires
together. Note: There will be no wire on terminal 12.
R4140M replacements:
Check terminal 13 of the Q520 wiring subbase.
— If nothing is on 13, install the new R7140M1007.
— If 13 is jumpered to 8, remove the jumper and install
R7140M1007.
— If 13 goes somewhere (assume a low fire switch
because the system has a damper motor), remove J1
and J2 from the back of the R7140M1007.
NOTE: J1 and J2 provide an input for the R7140M when
the system does not have a spring return damper
with a low fire switch.
Leaving J1 and J2 in place with either 13 jump-
ered to 8 or with the low fire switch will cause the
blower motor to come on after the R7140M is
installed and power is supplied to the system.
Generally, the following table will apply to select
the R7140M1007 model and the status of jumpers
J1 and J2.