2
INSTALLATION AND WIRING (cont’d)
HEATING-COOLING THERMOSTAT WITH SWITCHING
SUB-BASE (NOTE: If separate Heating & Cooling
Thermostats are used, SPDT Selector switch must be used.)
*NOTE: HONEYWELL TYPE R8184M USES DUMMY “Y“
AND “G” TERMINALS AS TIE POINTS.
F
F
C
W
RH
RH
W
Y
G
RC
Y*
G*
F
F
C
W
RH
RH
W
Y
G
RC
ORANGE
FLAME
DETECTOR
WIRE
NUTS
INSTALLED
JUMPER
W-R
HEATING-COOLING
THERMOSTAT
W-R TYPE 668-451
WIRING TERMINALS
W-R TYPE 668-451
WIRING TERMINALS
W-R 2-WIRE
HEATING ONLY
THERMOSTAT
IGN.
TRANS.
PRIMARY
CONTROL
WHITE
COOLING
CONTACTOR
FAN RELAY
FLAME
DETECTOR
FLAME
DETECTOR
H-W TYPE R8184M
WIRING TERMINALS
COOLING
CONTACTOR
FAN RELAY
BLACK
LIMIT
LINE
HOT
N
BURNER
MOTOR
F
F
C
W
RH
RH
W
External Line Voltage Wiring
Low Voltage Wiring
Low Voltage
2-Wire Heating Only
All wiring should be done in accordance with local and national electrical codes and ordinances.
TESTING
The following control checks should be made after each
installation to insure that the controls are correctly wired
and functioning properly.
1.
Open the main line switch.
2.
Adjust thermostat or operating control to call for heat.
3.
Operate the manual reset button on top of control.
4.
Make certain that high limit control is set at the correct
temperature.
5.
Open the hand valve in the oil line. The system is now
ready for the following tests.
A. NORMAL CYCLE:
Close the line switch. The burner should start and
continue to run normally. (If burner starts, establish-
ing flame, but then locks out on safety, make “Flame
Detector Check” at this time.)
B. SAFETY TIMING:
1.
Let the burner run for about 5 minutes. Then remove
one of Flame Detector leads from the “F” terminals.
After a time period corresponding to the safety timing
has elapsed, the control should lock out on safety,
stopping the burner.
2.
Open the line switch.
3.
Replace Flame Detector lead removed in step 1.
4.
Wait 3 minutes. Then operate the manual reset button
on top of control.
C. HIGH LIMIT AND THERMOSTAT CHECK:
1.
Close the line switch to start the burner.
2.
Lower the setting of the high limit control to its lowest
setting. This should stop the burner, unless furnace or
boiler temperature is below the minimum setting of the
high limit.
3.
Return high limit control to its proper setting. Burner
should restart.
4.
With the burner running, turn thermostat to its lowest
setting. This should stop the burner, unless actual room
temperature is below the lowest setting of the thermostat.
On systems supplying domestic hot water, burner
will continue to run if low limit control is not
satisfied.
5.
Return thermostat to its proper setting.
D. FLAME DETECTOR CHECK: (This test is not re-
quired if the control performs as described in test A.)
If the burner starts but the control locks out (stopping the
burner), check the flame detector as follows:
1.
Open the line switch.
2.
Connect one end of a wire jumper to one of the “F”
terminals.
3.
Start the burner by closing the line switch. As soon as
the flame has been established, connect the other end
of the wire jumper to the other “F” terminal.
The control provides NO SAFETY PROTECTION
with this jumper installed. DO NOT leave burner
in this condition except for making this check.
If the control still locks out with the jumper installed, the control
should be replaced. If the control does not lock out, however,
check the operation of the 956 flame detector as follows:
NOTE
WARNING
!
Possible Cause of
Trouble
Open circuit in Cell
Flame detector im-
properly positioned
Replace Cell (or Cell Assembly) of
956 Flame Detector. Do not disturb
position of bracket or socket assembly.
Locate flame detector according to the
burner manufacturer’s specifications.
Correction