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7 60-2285—7
R4795A
INSTALLATION
Fig. 6—Flame detector wiring.
M8686
BLUE
WHITE
F
G
C7027, C7035, OR C7044
ULTRAVIOLET FLAME DETECTOR
BLUE
YELLOW
BLACK
BLACK
F
G
C7012 ULTRAVIOLET DETECTOR
1
G
F
X
X
X
X
X
X
FLAME ROD
G
F
X
X
PHOTOCELL
1
C7027, C7035, AND C7044 FLAME DETECTOR LEADS ARE COLOR
CODED BLUE AND WHITE. THE BLUE LEAD MUST BE CONNECTED
TO THE F TERMINAL AND THE WHITE LEAD MUST BE CONNECTED
TO THE G TERMINAL. THIS CIRCUIT IS DC AND THE UV SENSING
TUBE IS POLARITY SENSITIVE. REVERSING THE LEADS EVEN
MOMENTARILY CAN DAMAGE OR DESTROY THE UV TUBE.
POWER
SUPPLY
Fig. 7—Alarm terminal connections.
Mounting R4795 On Subbase
Make sure that the power supply is disconnected.
Loosen the thumbscrew and remove the cover (see Fig. 8).
Position the R4795 over the Q270 Subbase. Start all ten
mounting screws and tighten uniformly. These screws com-
plete electrical circuits (terminal 1 excepted) and hold the
R4795 to the subbase.
L1
(HOT)
L2
1
1
2
2
IF A LINE VOLTAGE ALARM IS USED, THE R4795 MUST BE
MOUNTED IN A SUITABLE ENCLOSURE.
POWER SUPPLY MUST MATCH THE ELECTRICAL RATINGS OF THE
ALARM. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
LINE OR
LOW VOLTAGE
ALARM
ALARM TERMINALS (OPTIONAL)
N.C.
N.O.
COM
M8687
R4795
ALARM
POWER
SUPPLY
CAUTION
Do not overtighten the mounting screws because
damage to the circuit board can result. Maximum
recommended torque is 10 lb-in. (1.13 N•m).
Replace cover and securely tighten thumbscrew.
Fig. 8—R4795 and Q270 Subbase.
TERMINAL
BLOCKS
PURGE TIMER
AMPLIFIER
COVER
THUMBSCREW
SAFETY SWITCH
RESET BUTTON
IN COVER
CAPTIVE MOUNTING
SCREWS (10)
Q270
SUBBASE
M8688