Robertshaw 720 SERIES - User Manual

INSTALLATION DATA
720 SERIES
HOT SURFACE IGNITION GAS VALVE
The Robertshaw® 720 series gas valves for use on hot surface ignion
systems are designed for a wide variety of applicaons. The 720 series
valves incorporate a manual valve, dual automac 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 connecons, 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 mul-posion and can be mounted in
any posion (except upside down).
SPECIFICATIONS
Electrical Rangs .........................................................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
INSTALLATION INSTRUCTIONS
SIZE
MIN. MAX. MIN. MAX.
3/8” x 3/8” 15,000 175,000 15,000 437,000
1/2” x 3/8” 15,000 175,000 15,000 437,000
1/2” x 1/2” 15,000 200,000 15,000 500,000
1/2”x 3/4” 15,000 200,000 15,000 500,000
3/4” x 3/4” 15,000 200,000 15,000 500,000
NATURAL L.P.
TYPE GAS
CAUTION
THIS DEVICE SHOULD BE INSTALLED BY A QUALIFIED
TECHNICIAN WITH DUE REGARD FOR SAFETY AS IMPROPER
INSTALLATION COULD RESULT IN A HAZARDOUS CONDITION.
FOR YOUR SAFETY
IF YOU SMELL GAS: (A) turn o gas at line valve or meter, (B) open
windows, (C) do not touch electrical switches, (D) exnguish all open
ames, (E) immediately call your gas supplier from neighbors.
To avoid possible injury, re and
explosion, please read and follow
these precauons and all
instrucons on the appliance.
This bullen is intended as a
guide to qualied servicemen
installing or servicing Robertshaw
Controls. Repairs, adjustments
and servicing should be limited
to the operaons listed in this
bullen or on the appliance.
Turn o gas supply and electrical power to
equipment before servicing
PIPING
1. Check replacement valve for mulple 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 condion.
Do not subject control to more than 1/2 PSI, (14” W.C.) inlet
pressure.

Robertshaw 720 SERIES Specifications

General

Brand	Robertshaw
Model	720 SERIES
Category	Control Unit
Language	English

Summary

SPECIFICATIONS

REGULATION CAPACITIES

INSTALLATION INSTRUCTIONS

Safety Cautions and Warnings

Key safety notes including general caution, fire/explosion warnings, and gas smell procedures.

Safety for Your Use

Critical safety advice for gas smell scenarios and proper handling of gas appliances.

INSTALLATION INSTRUCTIONS (CONTINUED)

Piping and Installation Details

Guidance on drip legs, pipe thread compound, multi-position mounting, and avoiding internal damage.

Pilot Tubing and Wiring

Instructions for connecting pilot tubing and essential wiring precautions to prevent damage and voiding warranty.

7200 DER Models Wiring

Specific wiring instructions for connecting the gas valve terminal #1 and #2 to the ignition control module.

7200 IPER Models Wiring

Instructions for connecting the white wire terminal adaptor to specific terminals on the gas valve.

Pressure Regulator Vent

Information on the Vent Limiter, tubing requirements, and potential issues with bleed tubing.

Leak Test Procedure

Guidance on performing a leak test using soap solution after installation.

OPERATING INSTRUCTIONS

General Operation Cautions

Critical warnings about fire, explosion, gas smell, and proper handling of the gas control knob.

Selector Arm Operation

Instructions on how to operate the selector arm, including the sequence for moving to the 'off' position.

Post-Installation Steps

Steps after setting the selector arm, including leak testing and replacing burner access panels.

SERVICE INSTRUCTIONS

Control Handling and Replacement

Precautions for controls exposed to water and procedures for handling non-shut-off failures.

Pressure Regulator Adjustments

How to attach a manometer and adjust the pressure regulator using the adjustment screw.

Regulator Conversion to L.P.

Step-by-step guide to convert the gas valve from natural gas to L.P. gas.

Post-Conversion Checks

Final checks including leak testing, attaching conversion labels, and setting thermostat.