Honeywell VS8420C Installation Instructions Manual page 3

DROP
PIPED
HORIZONTAL
GAS
SUPPLY
GAS
CONTROL
3 IN.
(76 MM)
MINIMUM
2
DROP
HORIZONTAL
TUBING
GAS
1
SUPPLY
RISER
3 IN.
(76 MM)
MINIMUM
2
1 ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.
2 CAUTION: SHUT OFF THE MAIN GAS SUPPLY BEFORE REMOVING
END CAP TO PREVENT GAS FROM FILLING THE WORK AREA. TEST
FOR GAS LEAKAGE WHEN INSTALLATION IS COMPLETE.
Fig. 1. Sediment trap installation.
TWO IMPERFECT
GAS CONTROL
THREADS
PIPE
THREAD PIPE THE AMOUNT
SHOWN IN TABLE FOR
INSERTION INTO GAS CONTROL
Fig. 2. Use moderate amount of pipe compound.
Install Valve (Using Tubing)
1. Mount valve 0 to 90 degrees, in any direction—
including vertically—from the upright position of
the gas control knob.
2. Mount the valve so gas flow is in the direction of
the arrow on the side of the valve.
3. Slip gland and ferrule over tubing.
4. Insert tubing into inlet/outlet connection until it
bottoms, slide ferrule and gland into place and
turn finger tight. Do not use pipe joint compound.
5. Use a wrench to tighten gland about 1 turn
beyond finger tight. Refer to Fig. 3 through 5.
RISER
PIPED
GAS
SUPPLY
3 IN.
(76 MM)
MINIMUM
2
GAS
CONTROL
APPLY A MODERATE AMOUNT OF
PIPE COMPOUND TO PIPE ONLY
(LEAVE TWO END THREADS BARE).
Pilot Gas Connection
1. Square off the end of tubing and remove burrs.
2. Slip compression fitting over tubing. Insert tubing
GAS
CONTROL
into pilot outlet connection until it bottoms, slide
fitting into place and turn finger tight. Do not use
jointing compound.
3. Use a wrench to tighten fitting about 1-1/2 turns
beyond finger tight to shear off the olive.
4. Connect other end of tubing to pilot burner
according to the manufacturer's instructions.
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury or
death.
Do not bend tubing at gas valve after compres-
sion fitting has been tightened, as this may
result in a gas leak at the connection.
OUTLET
PRESSURE
TAP
M3077
HI/LO
REGULATOR
Fig. 3. Top view of gas valve with HI/LO regulator.
TAP
M3075B
PRESSURE
REGULATOR
ADJUSTMENT
(UNDER CAP SCREW)
PIEZO SPARKER
Fig. 4. Top view of gas valve with standard
3
VS8420C,M MILLIVOLT GAS VALVE
INLET
PRESSURE TAP
GAS
CONTROL KNOB
GAS
CONTROL KNOB
regulator.
WIRING
TERMINALS
M12670
WIRING
TERMINALS
M12673
69-1304