Sentinel R500 Manual

Sentinel Performance Solutions Ltd, The Heath Business & Technical Park
Runcorn, Cheshire, WA7 4QX T: [phone] F: [phone]
Page 1 of 3 Mar-11
Technical Information
Sentinel JetFlush Survey Kit
Survey Kit Components
•Sentinel X100 Test Kit
•Turbidity Tube
•TDS Meter
•Mini IR Thermometer
•Conductivity/TDS Standard
(1413µS/989ppm)
Introduction
The JetFlush Survey Kit is designed for use in
conjunction with the Sentinel JetFlush domestic
central heating system flushing unit. It will rapidly
identify where problems exist due to the build up
of corrosion and scale debris and allow you to
demonstrate the effectiveness of the flush once it
has been completed. The Survey Report can be
printed and it allows you to record relevant
information, both pre and post flushing, to show
the improvements to the system. The completed
report can then be left with the customer.
Procedure
Mains Water
Take a sample of cold mains water and measure
the TDS using the meter supplied and following
the instructions shown later. Record the reading
in the appropriate box on the Survey Report.
Heating system - Pre-flushing
After setting the boiler thermostat to a
temperature below 40oC, as per the JetFlush
Manual, and allowing the system to stabilise, a
survey of the system should be carried out as
follows using the Survey Report:
1. Locate each radiator and record the locations
on the Survey Report.
2. Measure the temperature at 5 points on each
radiator surface by pointing the IR
thermometer at the following points:
•Bottom left (BL)
•Top left (TL)
•Centre (C)
•Bottom right (BR)
•Top right (TR)
Record the readings on the Survey Report
and note those radiators with substantial cold
spots.
3. Record the settings of any TRVs before
opening them to their maximum.
4. Locate the system drain valve and allow to
run to waste for 1 minute taking appropriate
care to avoid burns by using heat resistant
gloves. Take a sample of water and carry out
the following:
•Fill the Turbidity Tube to the top mark
(200ppm) and look through the column of
water. If the black concentric circles can
be seen then record the turbidity as
<200ppm.
•If the circles cannot be seen, remove
small volumes of water until they are
visible. At the final water level take the
reading off the side of the tube and record
on the Survey Report.
Heating System – Flushing
To determine whether the system is completely
flushed, take a sample of water from the drain
valve and carry out either or both of the following
two tests:
1. Fill the Turbidity Tube to the top mark again
(200ppm) and look through the column of
water. If the black concentric circles are
visible then the system is sufficiently clean. If
the circles are not visible, then further
flushing is required until the circles can be
seen. Record the final reading on the Survey
Report e.g. <200ppm.

Sentinel Performance Solutions Ltd, The Heath Business & Technical Park
Runcorn, Cheshire, WA7 4QX T: [phone] F: [phone]
Page 2 of 3 Mar-11
Technical Information
2. Measure the TDS of the water, using the
meter supplied. If this value is within 10% of
the TDS of the cold mains water (previously
measured) it indicates that the system has
been flushed satisfactorily to remove the
cleaning chemical. Record the TDS reading
on the Survey Report once a satisfactory
reading has been obtained.
Heating System – Post-flushing
Once the final flush has taken place and Sentinel
X100 scale and corrosion inhibitor has been
added, take a further system sample and check
for correct levels of Sentinel X100 using the
Sentinel Test Kit. Once a satisfactory level has
been achieved record this on the Survey Report
in the appropriate place.
Finally, return each TRV to its original position,
switch on the boiler and allow it to come up to
temperature without resetting the thermostat. The
radiators must then be bled as necessary and a
further temperature survey of the radiators
carried out as detailed in the Pre-flushing section
above. The new temperatures must then be
recorded on the Survey Report in the appropriate
place.
Test Equipment Instructions
Turbidity Tube
The Turbidity Tube is an excellent way of
assessing the clarity of the system water. It is
calibrated along the length of the tube in terms of
parts per million of suspended solids and also
turbidity units. The simple process of using the
tube is as follows:
1. Fill the tube to the top line (200ppm) with
system water
2. Look through the column of water. If the black
concentric circles can be seen then the level
of suspended solids is <200ppm and, for
most situations, this would indicate a
satisfactory quality of water.
3. If the circles cannot be seen then remove
water from the tube until they are visible. At
the final water level take the reading off the
side of the tube.
TDS Meter
Operation
1. Remove the probe cap, and then press the
POWER button. The LCD should now show
"0000".
2. Dip the probe into the water without
exceeding the water level limit (just over the
logo).
3. Stir gently until the display stabilises and then
press the HOLD button once and remove
from the water.
4. Read the value on the display expressed in
ppm.
5. To reset the reading when in use, press the
HOLD button. The LCD should now show
'0000'.
6. After measuring, turn off the power and
gently shake the meter to remove residual
water and then close the probe cap.
The meter can also be used to measure
temperature. To change from Fahrenheit (oF) to
Celsius (oC) press the MODE button once.
Calibration
1. Remove the probe cap, and then press the
POWER button. The LCD should now show
“000”.
2. Dip the probe into the water without
exceeding the water level limit (just over the
logo).
3. Stir gently until the display stabilises. The
reading should be 989 +/- 25ppm.
4. If the reading is incorrect, press and hold the
MODE button for four seconds. The
temperature reading will switch to CAL.
5. Change the reading until it shows 989ppm by
pressing the UP (MODE) button or the
DOWN (HOLD) button.
6. Once the reading matches the calibration
solution, press and hold the MODE button
again for four seconds until the temperature
reading appears. Your meter is now
calibrated.

Sentinel Performance Solutions Ltd, The Heath Business & Technical Park
Runcorn, Cheshire, WA7 4QX T: [phone] F: [phone]
Page 3 of 3 Mar-11
Technical Information
Battery Replacement
1. Remove the battery compartment on top of
meter using your fingernail. It is firmly in the
meter but will slide out. Replace old battery
with new CR2032 battery ensuring battery is
properly placed with the positive "+" side up.
2. Close the battery compartment making sure it
is tightly closed.
Mini Infrared Thermometer
Operation
1. Point the unit at the surface to be measured.
Ensure that the meter is approximately 12”
(30cm) away from the surface. The light spot
is used for aiming at the target.
2. Press the button and the temperature reading
will be updated on the LCD. When the
operator releases the button, the reading will
automatically be held on the LCD for 10
seconds. After 10 seconds the thermometer
will power down.
3. The temperature units can be changed by
using the oC/oF switch.
Measurement Notes
1. If the surface of the object under test is
covered in oil, grime etc clean before taking
measurements.
2. If the surface of the object is highly reflective,
apply masking tape to the surface before
measuring.
3. Steam, dust, smoke can obscure accurate
measurements.
Battery Replacement
When the low battery symbol appears on the
LCD, replace the meter’s 1.5V batteries. Detach
the battery compartment cover by pushing the
engraved pattern on the handle and pull down.
Replace the 1.5V x 2 batteries with new ones
and replace the battery compartment cover.
Sentinel Test Kit
Instructions for use
1. Place one No. 1 tablet and one No. 2 tablet in
the plastic tube.
2. Fill the tube brim-full with a fresh sample of
water from the central heating system.
3. Stopper the tube and shake well.
4. Leave for 5 minutes for the colour to develop,
shaking occasionally.
5. Hold the tube up against the white panel on
the colour comparison card.
6. If there is sufficient Sentinel X100 present to
protect the system, the liquid in the tube will
be a darker colour than the yellow card.
7. If the liquid in the tube is a lighter colour than
the card, add more Sentinel X100 to the
system and repeat the test.
8. Rinse the tube thoroughly with tap water after
use.