ENCON SAF-T-FLO STF30 Series, Инструкция по установке, эксплуатации и обслуживанию

Страница: 9 / 27

Doc. No.: 09900003A Rev. F
Page 8 of 26
Issue Date: 07-19-11
c) Use a small open-end wrench or flat head screwdriver to turn the calibration screw. Turn
the calibration screw to adjust the thermometer pointer to the correct tempera-ture, if
necessary.
d) Reinstall 1-TI to unit. Follow installation procedures below.
3. 1-TI removal and installation procedures:
a) To remove, apply an open-end wrench of the appropriate size to the 1-TI hex screw and
remove by turning counterclockwise. Care must be taken to prevent damage to dial lens.
b) To reinstall, apply appropriate thread sealant on the hex screw and place 1-TI stem into
the thermowell. Carefully tighten the hex screw until a non-leaking fit is achieved and the
head is facing the desired position.
E. SOLENOID VALVES - 1-SOL and 2-SOL
The Saf-T-Flo

contains two (2) solenoid valves: 1-SOL and 2-SOL. 1-SOL (a normally open
valve) is located in the bypass line adjacent to the cold water connection of the blending valve.
It operates as the bypass valve under over-temperature conditions. Prior to flow actuation, this
valve stays open allowing cold water to bypass the mixing valve 1-TCV. 2-SOL (a normally
closed valve) is located in the blended water outlet line. It is used to shut off the water flow if
high temperature is detected by thermostat 1-TAS. These two valves are wired in parallel and
are controlled by a flow switch 1-FLS and thermostat 1-TAS. 1-SOL and 2-SOL are used to
control and direct water flow in order to provide redundant safe guards against hot water
leaving the blending system. The valves also ensure there is water flow available to the
emergency shower stations at all times. Refer to
Diagrams 1 through 4, Section VII .
Solenoid valve inspection is limited to checking proper operation and valve water leakage.
1. Terminal connections to the solenoid valves should be inspected periodically to ensure they
are tight and free of oxide build-up and dust.
2. Depending on service conditions and filtration utilized, it may be required to periodically
clean and/or replace worn components. Valve body need not be removed from the lines.
Valve rebuild kits are available. See
Section VI - REPLACEMENT PARTS and Diagrams
5 and 6, Section VII .
CAUTION CAUTION CAUTION
PRIOR TO ATTEMPTING MAINTENANCE:
TO AVOID ELECTRICAL SHOCK, DE-ENERGIZE SAF-T-FLO

AT MAIN ELECTRICAL
POWER SUPPLY
DRAIN ALL WATER LINES.
CARE MUST BE TAKEN WHEN OPENING JUNCTION BOX COVER TO PROTECT THE
INDICATING LIGHT WIRING INSIDE THE BOX.
USE PIPE SEALANT SPARINGLY.