ThermOmegaTech GURU DL 2.1 User manual

INSTALLATION INSTRUCTIONS
GURU® DL 2.1
353 Ivyland Road • Warminster, PA 18974-2205 • Phone: [phone] • www.ThermOmegaTech.com
Before installing GURU® Plug, remove nose seal protector from cartridge.
1. Select locations for GURU® PLUGS: These should be at the lowest positions possible on the system to be freeze
protected and should be accessible for future re-arming.
2. Apply pipe thread sealant (Loctite 567 or equal) to the external threads on Hex body noting to leave leading thread
bare so as not to contaminate the system.
3. Install the GURU® PLUG (tightening the hex body to 80 ft-lbs) with its cartridge facing down or at a 45° angle (as
shown) for best accessibility. (Make sure lanyard is placed over paint mask and not between paint mask and cartridge
tip. Paint mask must be cupped toward cartridge tip.) Do not remove paint mask (cover) on cartridge. Do not cut lanyard!
4. GURU® PLUG must be installed with a 2.75 in (69.85 mm) minimum operating clearance to allow cartridge to pop out.
5. Cartridge can be removed by pushing in and twisting counter-clockwise (no tools required) and re-installed by pushing
in and twisting clockwise.
6. Under freezing conditions, cartridge may be re-installed after reheating.
IMPORTANT: To operate properly in extreme conditions, the GURU®
assembly must be dry. If the actuator nose seal leaks or drips, replace
hex nut and cartridge immediately.
CAUTION: When re-arming GURU® always melt any ice formations from
cartridge and inside of hex body prior to installing GURU® PLUG Cartridge
to prevent seal damage.
NOTE: Cartridge and inside of hex body must be dry before assembly.
7. Preferred method of testing: GURU® PLUG must be removed from
cooling system for proper testing. Horizontally place the assembly on a
at surface. Using a can of freeze spray (available through most home-
building supply stores or specialty suppliers) intermittently spray the
actuator nose to keep a layer of frost on the metal surface. Cartridge
should pop within one minute. If not, replace entire unit. Warm the cartridge before reinstalling.
To remove GURU® PLUG CARTRIDGE for service or warming*:
Push cartridge in and twist to the left (counter-clockwise) until it stops. Cartridge
will pop out. Remove loop of lanyard cable from GURU® Cartridge.
To reinstall GURU® PLUG CARTRIDGE*:
Make sure GURU® Cartridge is warmed to 55°F or higher. Replace loop of lanyard
in groove of cartridge. Make sure lanyard is placed over paint mask and not be-
tween paint mask and cartridge tip. Paint mask must be cupped toward cartridge
tip. Push cartridge in and turn to the right until locked. Do not remove paint mask
(cover) on cartridge.
Make sure the Hex Nut seat is cleaned before reinserting. You can wipe it with an
alcohol wipe or equal (lint-free) wipe.
*Prior to lling system with cold water, warm cartridge and place the GURU®
Flag and Clip tool (shown at right: part number 04-052) in the slotted actuator to
prevent cartridge from releasing. This will provide a visual indication that a GURU®
cartridge is disabled. Do not use if you do not plan to immediately operate
locomotive.
HEX BODY
CARTRIDGE TIP
BALL BEARINGS (3)
SLOTTED ACTUATOR
LOCKING
SLOTS (3)

TYPE-T
0.687 in DIA
(17.45 mm)
MIN. CLEARANCE
2.75 (69.85 mm)
3.75 in
(95.25 mm)
TYPE-FL & TYPE-FL-GX
4.75 in
(120.65 mm)
3.75 in
(95.25 mm)
6.50 in
(165.1 mm)
FL-GX has at
faced anges
(no seal)
FL has ange
face seal
Note: Max value rotation angle
for all Types is 45˚
TYPE-S
3.29 in
(83.57 mm)
1-1/4" NPT
1-1/4” NPT
45˚ Max 45˚ Max
4.75 in
(120.65 mm)
3.96 in
(100.58 mm)
Min. Clearance
2.75 in (69.85 mm)
353 Ivyland Road • Warminster, PA 18974-2205 • Phone: [phone] • www.ThermOmegaTech.com
Min. Clearance
2.75 in (69.85 mm)
TYPE-CR
4.50 in
(114.3 mm)
3.75 in
(95.25 mm)
Min. Clearance
2.75 in (69.85 mm)
3.75 in
(95.25 mm)
TYPE-CH
0.375 in DIA.
(9.53 mm)
2.93 in
(74.42 mm)
2.63 in
(66.8 mm)
PENNY
1 GURU®-CH PER
COMPRESSOR HEAD

TYPE-CR/FL/P & TYPE-CR/FLGX/P
A
A
A
A
FL-GX has at
faced anges
(no seal)
FL has ange
face seal
GURUDL_IMI
REV: 1/18/22
6.50 in
(165.1 mm)
3.75 in
(95.25 mm)
7.25 in
(184.15 mm)
4.50 in
(114.3 mm)
353 Ivyland Road • Warminster, PA 18974-2205 • Phone: [phone] • www.ThermOmegaTech.com
YEARLY COLOR CODES (CHANGES JANUARY 1)
2017 YELLOW 2018 WHITE 2019 RED
2020 SILVER 2021 GREEN 2022 YELLOW
SERIES REPEATS
WARNING: This product can expose you to chemicals, for example lead, nickel, acrylonitrile, which are known to the State of
CA to cause cancer, birth defects, or reproductive harm. For more information, go to www.P65Warnings.ca.gov
Warranty information disclosed at www.thermomegatech.com/terms-conditions/
Note: Max value rotation angle for all Types is 45˚
ThermOmegaTech® recommends changing the GURU® Plug every 18-24 months. The characteristic tendency of the
GURU® Plug’s actuator is to lose a small amount of stroke as it ages beyond one year. This stroke loss causes the
release temperature and the manual reset temperature to creep upward. While this is a “safe” tendency for freeze
protection, the upward creep can eventually cause nuisance dumping.
The GURU® Plug’s colored cap serves as a visual indicator of the year it was built. Five colors rotate, each associated
with a year. View the cap color chart below. The month and year that the valve was manufactured is also laser marked
on the top of each cap.
NOTE: Both the Hex Nut and Valve Cartridge MUST be changed out.
We offer a rebuild program that allows you to return your old Guru Plugs to be refurbished for a discounted price. For
more information visit www.thermomegatech.com/guru-rebuild-program/ or contact the factory.
MAINTENANCE