Robertshaw 720 SERIES Installation Data

The Robertshaw® 720 series gas valves for use on hot surface ignition
systems are designed for a wide variety of applications. The 720 series
valves incorporate a manual valve, dual automatic valves and a main
gas pressure regulator. Models for step-opening are also available.
720 valves have their pressure regulators factory pre-set at 3.5 W.C. for
natural gas. Uni-Kit models can be converted to L.P. by installing the
Regulator Conversion kit (included).
720 series valves feature wiring connections, manual selector and
adjustments that are all easily accessible on top of the valve. With a
3-9/16" swing radius, the 720 series lends itself well to replacing many
O.E.M. valves. The 720 valves are multi-position and can be mounted in
any position (except upside down).

SPECIFICATIONS

Electrical Ratings .........................................................24 VAC, .5 amps
Pressure Regulator
Natural Gas ....................................................factory set at 3.5" W.C.
L.P. Gas..........................................................factory set at 11.0" W.C.
Ambient Temperature ......................................................-40° to 175°F
Maximum Inlet Pressure ......................................................... 1/2" PSI

REGULATION CAPACITIES

SIZE
NATURAL
MIN.
3/8" x 3/8" 15,000
1/2" x 3/8" 15,000
1/2" x 1/2" 15,000
1/2"x 3/4" 15,000
3/4" x 3/4" 15,000

INSTALLATION INSTRUCTIONS

THIS DEVICE SHOULD BE INSTALLED BY A QUALIFIED
TECHNICIAN WITH DUE REGARD FOR SAFETY AS IMPROPER
INSTALLATION COULD RESULT IN A HAZARDOUS CONDITION.
TYPE GAS
L.P.
MAX. MIN.
175,000 15,000
175,000 15,000
200,000 15,000
200,000 15,000
200,000 15,000
Caution
To avoid possible injury, fire and
explosion, please read and follow
these precautions and all
instructions on the appliance.
This bulletin is intended as a
guide to qualified servicemen
installing or servicing Robertshaw
Controls. Repairs, adjustments
and servicing should be limited
to the operations listed in this
bulletin or on the appliance.
HOT SURFACE IGNITION GAS VALVE
MAX.
437,000
437,000
500,000
500,000
500,000
IF YOU SMELL GAS: (A) turn off gas at line valve or meter, (B) open
windows, (C) do not touch electrical switches, (D) extinguish all open
flames, (E) immediately call your gas supplier from neighbors.
Turn off gas supply and electrical power to
equipment before servicing

PIPING

1. Check replacement valve for multiple outlets (side outlets). If it has
them, be sure all unused outlets are plugged using the sockets
provided.
2. Pipe or tubing must be clean and free of scale and dirt.
3. Make sure gas piping is pressure tested before control is connected.
High pressure can damage control causing a hazardous condition.
Do not subject control to more than 1/2 PSI, (14" W.C.) inlet
pressure.
INSTALLATION DATA
720 SERIES
FOR YOUR SAFETY