Note: This is a control system which must be cleaned and maintained regularly (see Maintenance Guide and Record card included with valve shipment).
4
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
To Dismantle Valve:
Shut o
ff
hot and cold water supplies to valve. Loosen set
screw. Remove snap cap, pointer screw, washer, pointer and
friction spring (see Figure 1). Remove cover screws and cover
(thermostat and gears are attached to cover).
When reassembling, insert
fl
ange packing into valve body and
replace cover and cover screws. Then replace friction spring,
pointer, washer, screw, and snap cap.
After replacing parts, pointer must be reset. Refer to page 2
instructions “To Reset Adjustable High Temperature Stop.”
To Clean Port Sleeve Assembly:
Screw (twist) the check nut away from valve body towards port
sleeve assembly. Then twist port sleeve nut away from port
sleeve assembly (towards valve body) to release port sleeve
and thimble (Figure 2).
Clean with non-corrosive agent and soft cloth. DO NOT
USE ABRASIVES. Wash parts thoroughly after cleaning and
reassemble.
Install port sleeve with elongated holes nearest the check
nut and tighten port sleeve nut against port sleeve assembly.
DO NOT OVERIGHTEN. Tighten check nut against valve body.
Driving ball on thermostat group should then be inserted into
ball socket for
fi
nal reassembly (Figure 1).
To Replace Pointer Rod With Gear:
Loosen set screw and remove snap cap, pointer screw, washer,
pointer and friction spring (Figure 1). Remove cover screws
and cover. Then remove coil sleeve stud and thermostat group.
Replace pointer rod with gear, and reassemble.
To Replace or Clean Thermostat Group:
See “To Replace Pointer Rod with Gear” (above) to disassemble
valve. Clean any collected deposits from thermostatic coil with
brush and non-corrosive cleaning solution.
Elongated Holes
(nearest the check nut)
Pointer Set
Screw
Coil Sleeve
Stud
Flange Packing
and Cover Screws
Pointer Rod
with Gear
Ball
Socket
Driving
Ball
Pointer
Friction
Spring
Cover
Check Nut
Port Sleeve
Thimble
Port Sleeve
Nut
Elongated Holes
(nearest the check nut)
Pointer Set
Screw
Coil Sleeve
Stud
Flange Packing
and Cover Screws
Pointer Rod
with Gear
Ball
Socket
Driving
Ball
Pointer
Friction
Spring
Cover
Check Nut
Port Sleeve
Thimble
Port Sleeve
Nut
Figure 1
Figure 2
