Installation - Honeywell V4730C Manual

INSTALLATION

When Installing This Product...
1. Read these instructions carefully. Failure to follow them could
damage the product or cause a hazardous condition.
2. Check the ratings given in the instructions and on the pro-
duct to make sure the product is suitable for your application.
3. The installer must be a trained, experienced, flame safeguard
technician.
4. After installation is complete, check out product operation as
provided in these instructions
WARNING
Fire or Explosion Hazard. Can cause severe
injury, death or property damage
1. Turn off the gas supply before beginning installati-
on
2. Disconnect power to the valve actuator before be-
ginning installation to prevent electrical shock and
damage to the equipment.
3. Do not remove the seal over the valve inlet and
outlet until ready to connect piping.
4. The valve must be installed so that the arrow on
the valve points in the direction of the gas flow, so
that gas pressure helps to close the valve
Mounting Position
The valve/venturi is factory-calibrated in the upright position for
the most accurate metering of the gas flow.This is with the air
flow through the venturi in a horizontal direction and the gas flow
into the valve in a horizontal direction. The valve can be mounted
up to ±90 degrees from this position without affecting the fuel/air
metering at medium and high firing rates (3000 to 5000 rpm of
the blower), but at lower firing rates (1000 rpm) the fuel might be
reduced up to 10% when the valve is not mounted upright. To
counter this, the low fire gas flow may be carefully field adjusted
for non-upright mounting as follows:
1. With the valve in the final mounting position, adjust the venturi
fan for the lowest burner firing rate.
2. Remove the slotted cap on the gas regulator using a slotted
screwdriver. This will expose the offset adjustment screw
(see Fig. 11).
3. Using a TORX® T40 or a 5 mm hex wrench, carefully adjust
the low fire gas setting for proper combustion.
4. After proper low fire offset adjustment has been made, rein-
stall the slotted cap on the regulator.
5. Before commissioning the burner, check for proper lightoff
and verify correct fuel/air mix and combustion quality through
out the entire firing range (from lowest to highest fan speeds
used).
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
Mounting Locations
The distance between the gas valve and the wall/ground must be
a minimum of 11-5/16 in. (30 cm).
Main Gas Connection
1. Take care that dirt does not enter the gas valve during hand-
ling.
2. Remove the flanges from the valves.
3. Use new, properly reamed, pipe, free from chips.
4. Apply a moderate amount of good quality pipe dope, resi-
stant to the action of liquefied petroleum (LP) gas, only on the
pipe threads.
5. Screw the flanges onto the pipes.
6. Do not thread the pipe too far into the flange. Valve distortion
or malfunction can result from excess pipe in the flange.
7. Make sure O-ring sealing surfaces are clean.
8. Using general purpose lithium grease, grease the O-ring.
9. Install the O-ring into the O-ring groove provided on the valve
body (one O-ring per groove).
10. Mount the gas valve to the flanges, using the screws remo-
ved earlier.
11. Complete the electrical connections as instructed in the
Electrical Connections section.
WARNING
Fire or Explosion Hazard. Can cause severe inju-
ry, death or property damage.
Perform a soap-and-water solution gas leak test any
time work is done on a gas system.
Fig. 15: Regulating adjusting screw
EN2R-9074 0612R1-NE 13