INSTALLATION DATA
720-079 UNIVERSAL ELECTRONIC
IGNITION GAS VALVE UNI-KIT
®
The Robertshaw® 720-079 Universal Electronic Ignition Gas Valve
Uni-Kit® is de signed to work equally well on Intermittent Pilot, Direct
spark and Hot Surface applications.
The 720-079 features a manual selector, wiring connections and ad-
justments that are all easily accessible on the top of the valve. The
720-079 Uni-Kit has a pressure regulator that is pre-set at 3.5” W.C.
for natural gas. For L.P. gas applications the valve can be converted by
using a pressure regulator conversion kit that is included.
The 720-079 incorporates a manual valve, pilot valve (dual automatic
valves and a main gas pressure regulator all in a small compact valve
with a swing radius of 3-9/16’’. The small size of the 720-079 lends
itself to replacing many O.E.M. and competitive valves. The 720-079
is multi-positional and can be mounted in any position, except upside
down.
APPLICATION LIMITATIONS
Do not use on direct spark or hot surface applications if original valve
was a “slow opening” type. Also 720-079 will not replace Robertshaw
7000K series or White-Rodgers “cycle pilot” gas valves.
SPECIFICATIONS
Electrical Ratings
24 VAC, .45 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
7” W.C. - natural gas
14” W.C. - L.P. gas
REGULATION CAPACITIES
SIZE
TYPE GAS
NATURAL
L.P.
MIN.
MAX.
MIN.
MAX.
3/8” x 3/8"
15,000
175,000
15,000
280,000
1/2” x 3/8”
15,000
175,000
15,000
280,000
1/2" x 1/2"
15,000
200,000
15,000
320,000
1/2" x 3/4"
15,000
200,000
15,000
320,000
3/4" x 3/4"
15,000
200,000
15,000
320,000
INTERMITTENT PILOT • HOT SURFACE • DIRECT SPARK
PIPING
1. Check replacement valve for multiple outlets (side outlets). If it has
them, be sure all unused outlets are plugged using the socket plugs
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.
CAUTION
THIS DEVICE SHOULD BE INSTALLED BY A QUALIFIED
TECH NICIAN WITH DUE REGARD FOR SAFETY AS IMPROPER
IN STALLATION COULD RESULT IN A HAZARDOUS CONDITION.
4. If it’s not already installed, a drip leg (sediment trap) must be added to
the gas supply line to the control. (See figure below.) All piping must
comply with local
codes and ordinances and with National Fuel Gas Code
(ANSI Z223.1/ NFPA, No. 54).
INSTALLATION INSTRUCTIONS - ALL APPLICATIONS
Turn off gas supply and electrical power to equipment before servicing.
NOTE:
To prevent unsafe attempts at repair, special screws are used and replacement
parts are NOT
available.
* A plug is included for hot surface and direct spark applications.
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