Note: This is a control system which must be cleaned and maintained regularly (see Maintenance Guide and Record card included with valve shipment).
1
Guardian Equipment
1140 N North Branch St
Chicago, IL 60642
312 447 8100
telephone
312 447 8101
facsimile
gesafety.com
rev. 1215 / © 2015 Guardian Equipment
Installation, Operation and Maintenance Guide
G3900LF Series Thermostatic Mixing Valves
Angle
Checkstop
Angle
Checkstop
Angle
Checkstop
Angle
Checkstop
IMPORTANT: THESE SYSTEMS ARE DESIGNED TO PROVIDE MIXED
WATER FROM 60 TO 90°F
(
15 TO 32°C
)
FOR EMERGENCY EQUIPMENT
APPLICATIONS ONLY IN ACCORDANCE WITH ASSE 1071.
Hot Water
Inlet
G3900LF
Installation
1. Install valve in a location where it may be easily cleaned,
adjusted or repaired.
2. Inlets are clearly marked on valve body casting. Connect hot
water to inlet marked “HOT” and cold water to inlet marked
“COLD.”
3. Included angle checkstops must be installed on both supply
lines.
4. Use solder or pipe cement sparingly. Flush supply pipes
before connecting valve. Flush outlet pipe and valve once
valve is connected.
Maximum operating pressure is 125 PSI (860 KPA) for hot and cold
water. Maximum hot to cold water pressure di
ff
erential is 5%.
Note: Should piping be exposed to excessive hot or cold conditions,
it may be necessary to insulate piping to prevent freezing or
scalding water.
Cold Water
Inlet
Tempered
Water Outlet
Cold Water
Inlet
Hot Water
Inlet
Tempered
Water Outlet
G3950LF
Note: Please provide valve serial number (stamped on cover of valve) when ordering parts.
Redundant
Thermostatic
Mixing Valve
Primary
Thermostatic
Mixing Valve
