Instructions 7337/7347 Page 3
15 D recommended to ratio regulator to avoid hunting due to interaction between regulators.
bug screen above roof
(install gauge if used for cross-connection)
bug screen above roof
10 D Minimum
3D Minimum to next fitting
outlet Pressure Gauge
Relief Valve any distance from regulator but before downstream shutoff valve
inlet Pressure Gauge
1837D Needle Valve†
½ "- ¾ " Pipe pressure sensing line
Weld ¾ " half coupling to top or side of pipe. Drill ¾ " hole thru pipe wall. Remove burrs from inside.
7337-4
D –pipe size.
items in dotted lines not by Fives
reducing coupling not a bushing
drip leg or strainer
Figure 1. 7337-4 Installation
bug screen above roof ( do not cross-connect)
15 D recommended to ratio regulator to avoid hunting due to interaction between regulators.
5 D Minimum
3 D Minimum to next fitting
inlet Pressure Gauge
outlet Pressure Gauge
7337A-3
D –pipe size.
items in dotted lines not by Fives
10D
Figure 2. This schematic applies to 7337A-3 and 7347
* Use pipe unions to simplify regulator repair or replacement. † When necessary to dampen pulsation, use either an 1837D Needle Valve with fixed orifice bypass or use a fixed orifice (8699-A-0-295 or smalle r.)
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
Made with FlippingBook flipbook maker