TLV SR-B1.5 User manual

172-65603MA-08 (SR-B1.5/SR-B4) 5 October 2021
High-Temperature Waste Water Heat Exchanger
SR-B1.5/SR-B4
Copyright © 2021 by TLV CO., LTD.
All rights reserved

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
1
Contents
Introduction ...................................................................................1
Safety Considerations...................................................................2
Product Description.......................................................................4
Intended Use.................................................................................................4
System Principle...........................................................................................5
Specifications................................................................................6
Configuration.................................................................................6
Installation.....................................................................................7
Precautions before Installation......................................................................7
Installation Example for Piping to/from the SR-B Unit...................................9
Piping Installation 1: Blowdown/High-Temp. Water Inlet Piping..................10
Piping Installation 2: Blowdown/High-Temp. Water Outlet, Overflow, Body
Blowdown Piping and Overflow Piping for Exhaust Pipe ............................11
Piping Installation 3: Exhaust Piping...........................................................12
Piping Installation 4. Boiler Feed Water/Water Inlet and Outlet Piping .......15
Operation ....................................................................................16
Inspection and Maintenance........................................................ 18
Troubleshooting ..........................................................................19
TLV EXPRESS LIMITED WARRANTY........................................20
Service........................................................................................ 22
Introduction
Thank you for purchasing the TLV SR-B high-temperature waste water heat
exchanger.
This product has been thoroughly inspected before being shipped from the
factory. When the product is delivered, before doing anything else, check the
specifications and external appearance to make sure nothing is out of the
ordinary. Also be sure to read this manual carefully before use and follow the
instructions to be sure of using the product properly.
If detailed instructions for special order specifications or options not contained
in this manual are required, please contact TLV for full details.
This instruction manual is intended for use with the model(s) listed on the front
cover. It is necessary not only for installation but for subsequent maintenance
and troubleshooting. Please keep it in a safe place for future reference.

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
2
Safety Considerations
Read this section carefully before use and be sure to follow the instructions.
Installation, inspection, maintenance, repairs, disassembly, adjustment and valve
opening/closing should be carried out only by trained maintenance personnel.
The precautions listed in this manual are designed to ensure safety and prevent
equipment damage and personal injury. For situations that may occur as a result of
erroneous handling, three different types of cautionary items are used to indicate
the degree of urgency and the scale of potential damage and danger: DANGER,
WARNING and CAUTION.
The three types of cautionary items above are very important for safety: be sure to
observe all of them as they relate to installation, use, maintenance, and repair.
Furthermore, TLV accepts no responsibility for any accidents or damage occurring
as a result of failure to observe these precautions.
Symbols
Indicates a DANGER, WARNING or CAUTION item.
Indicates an urgent situation which poses a threat of death or
serious injury
Indicates that there is a potential threat of death or serious injury
Indicates that there is a possibility of injury or equipment / product
damage
Install properly and DO NOT use this product outside the
recommended operating pressure, temperature and other
specification ranges.
Improper use may result in such hazards as damage to the product
or malfunctions that may lead to serious accidents. Local regulations
may restrict the use of this product to below the conditions quoted.
Use hoisting equipment for heavy objects (weighing
approximately 20 kg (44 lb) or more).
Failure to do so may result in back strain or other injury if the object
should fall.
Take measures to prevent people from coming into direct
contact with product outlets.
Failure to do so may result in burns or other injury from the
discharge of fluids.
When disassembling or removing accessories used with the
product, wait until the internal pressure equals atmospheric
pressure and the surface of the product has cooled to room
temperature.
Disassembling or removing accessories from the product when it is
hot or under pressure may lead to discharge of fluids, causing
burns, other injuries or damage.
Continued on the next page
DANGER
WARNING
CAUTION
CAUTION

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
3
Be sure to use only the recommended components when
repairing the product, and NEVER attempt to modify the
product in any way.
Failure to observe these precautions may result in damage to the
product and burns or other injury due to malfunction or the
discharge of fluids.
Do not use excessive force when connecting threaded pipes to
the product.
Over-tightening may cause breakage leading to fluid discharge,
which may cause burns or other injury.
In case of unexpected steam flow, connect piping from the
exhaust outlet to a safe area.
Unexpectedly high steam volumes may cause high-temperature
condensate to be discharged through the exhaust outlet, which may
in turn cause burns or other injury.
Operate valves slowly and carefully.
Opening or closing valves too quickly may cause water hammer to
occur, the impact of which could cause damage to equipment.
Use only under conditions in which no freeze-up will occur.
Freezing may damage the product, leading to fluid discharge, which
may cause burns or other injury. If the water seal or inside of the
tube freeze, the inside of the product may be pressurized which
could cause problems on equipment or devices that are connected
to the product.
CAUTION

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
4
Product Description
Intended Use
The SR-B1.5/SR-B4 is a high-temperature waste water heat exchanger for recovering
heat energy from continuously discharged blowdown water from the boiler, or high-
temperature water of 100 C (212 F) or more, which is usually wasted.
By using this product for waste heat recovery, system energy efficiency, work
environment, and plant scenery can be improved without increasing back pressure
on the boiler or equipment.
Usages
High-temp. water generated
by the continuous blowdown
of the boiler
High-temp. condensate of
100 C (212 F) or more for
which the water quality is
inappropriate for condensate
recovery
Waste heat from applications
such as vulcanizers,
sterilizers and autoclaves
NOTE: Limited to applications
with no air or non-
condensable gases.
Improvement effect
Fuel reduction is realized by
exchanging heat between the
continuously discharged
blowdown water from the
boiler and the boiler feed
water to increase the water
supply temperature
Heat cold water for use as
hot water using high-temp.
condensate of 100 C (212 F) or more for which the water quality is
inappropriate for condensate recovery, or waste heat from applications such as
vulcanizers, sterilizers and autoclaves
Improves work environment and plant scenery by eliminating clouds of steam
generated around the plant
Confirm local regulations concerning boiler blowdown before using the product for
this application.
Bad image to
local residents
Bad effect on
building/equipment
from humidity
Continuous blowdown
from the boiler
Eliminate
flash steam Energy-saving
effect Use of
hot water
Continuous blowdown
from the boiler

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
5
System Principle
Because the hot water recovery side of the SR-B1.5/SR-B4 high-temperature waste
water heat exchanger is open to the atmosphere, there is hardly any back-pressure
(maximum 50 mmAq (0.07 psi)) on the boiler or the equipment where the high-temp.
water is generated. For this reason, it can be used without the restrictions of pressure
vessel regulations in most locations. Consult TLV for details.
Concerning the construction of the unit, there is a hot water outlet in the base of the
heat exchanger. This allows a water seal to be maintained which prevents flash
steam leakage. Thus, with a similar construction to closed type heat exchangers, it
can ensure an equivalent level of high efficiency heat exchange.
Operation flow of high-temperature waste water heat exchanger SR-B1.5/
SR-B4 (hereafter, SR-B)
①High-temp. water flows into the SR-B
from equipment connected to the
blowdown/high-temp. water inlet.
②High-temp. water and re-evaporated
steam from high-temp. water which has
flowed into the SR-B (shell side)
transfers heat to cold water inside the
heat transfer coil.
③Upon transferring heat the flash steam
that has recondensed and high-temp.
water which has had its sensible heat
consumed drops down to collect in the
base of the SR-B.
Furthermore, since flash steam inside
an airtight space produces a fall in
pressure, the inside of the SR-B is
maintained at atmospheric pressure or
a very slight vacuum (-0.5 kPaG (-7
psi)) which ensures a smooth influx of
high-temp. water.
④High-temperature water accumulated in
the lower part of the tank seals the shell,
and it becomes similar in structure to a
pseudo closed type heat exchanger.
⑤Once high-temp. water flows in and
accumulates up to the water level for the
blowdown/high-temp. water outlet shown in the figure to the right, it will be discharged
through the blowdown/high-temp. water outlet.
⑥If the amount of high-temp. water increases such that it cannot be fully discharged
though the blowdown/high-temp. water outlet, and thus accumulates up to the
overflow water level shown in the figure above, it will be discharged from the
overflow outlet.
⑦If the cold water flow rate decreases, or else the ability of the cold water to
absorb heat is surpassed causing a generation of flash steam; even if flash
steam accumulates inside the SR-B and the pressure begins to rise; the instant
that the pressure rises above 0.5 kPaG (7 psi) (a water seal with 50 mm (2 in) of
head pressure) the water seal will be broken and flash steam will be discharged
to the atmosphere through the exhaust outlet. (pressure will not accumulate
inside the unit)
Exhaust
Outlet
Boiler Feed Water/
Hot Water Outlet
Boiler Feed Water/
Cold Water Inlet
Blowdown/
High-temp.
Water Inlet
6
1
2
3
5
4
Blowdown/
High-temp.
Water Outlet
Overflow Water Level
Water Level for
Blowdown/High-temp.
Water Outlet
6
Body
Blowdown
Outlet
Overflow
Outlet

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
6
Specifications
Install properly and DO NOT use this product outside the recommended
operating pressure, temperature and other specification ranges.
Improper use may result in such hazards as damage to the product or
malfunctions which may lead to serious accidents. Local regulations
may restrict the use of this product to below the conditions quoted.
CAUTION
Use only under conditions in which no freeze-up will occur. Freezing may
damage the product, leading to fluid discharge, which may cause burns
or other injury. If the water seal or inside of the tube freeze, the inside of the
product may be pressurized which could cause problems on equipment
or devices that are connected to the product.
CAUTION
Refer to the product nameplate or submitted drawings for detailed specifications.
Do not install valves or orifices at the exhaust outlet, since the SR-B is an
atmospheric type heat exchanger.
Configuration
SR-B1.5/SR-B4
Appearance
Internal Construction
The figure above shows the SR-
B1.5.
The internal configuration of the
SR-B4 differs slightly from SR-
B1.5.
* Depending on the specifications, the product may or may not feature an overflow outlet for
the exhaust pipe.

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
7
Installation
Install properly and DO NOT use this product outside the recommended
operating pressure, temperature and other specification ranges.
Improper use may result in such hazards as damage to the product or
malfunctions which may lead to serious accidents. Local regulations
may restrict the use of this product to below the conditions quoted.
CAUTION
In case of unexpected steam flow, connect piping from the exhaust
outlet to a safe area. Unexpectedly high steam volumes may cause
high-temperature condensate to be discharged through he exhaust
outlet, which may in turn cause burns or other injury.
CAUTION
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
Do not use excessive force when connecting threaded pipes to the
product. Over-tightening may cause breakage leading to fluid
discharge, which may cause burns or other injury.
CAUTION
Precautions before Installation
Installation, inspection, maintenance, repairs, disassembly, adjustment and valve
opening/closing should be carried out only by trained maintenance personnel.
For the specific installation location of the SR-B, carefully consult the user.
Confirm following items for the installation.
1. Before installing the SR-B, carefully discuss and ensure the installation and
piping method.
2. Do not install the SR-B near a stairway or emergency exit.
3. The surface for installation of the SR-B should be sturdy and horizontal.
As the SR-B is heavy equipment, anchor the legs securely on a strong and
horizontal foundation using the anchor bolts. (Dimension of anchor bolts: M16)
(Refer to the illustration on the next page regarding the position for anchor bolts
and number of anchor bolts required.)
4. For cases where people or products may come in contact with the SR-B unit, any
safety measures, such as insulation or isolation, should be implemented to
prevent injury.
Even if such contact is unlikely, it is recommended that the SR-B unit be as well
insulted as possible to increase heat efficiency.
5. Maintenance space should be secured.
Although the SR-B cannot be disassembled, maintenance space should be
secured for valves, etc.
(Refer to the illustration on the next page regarding maintenance space.)
6. If the SR-B is installed at height, make sure to install the SR-B such that there is
enough space to carry out maintenance work etc. with anti-drop measures such
as handrails having been implemented. We may not be able to perform technical
support service in a location where work cannot be safely carried out.

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
8
Model
Position for anchor bolts
Maintenance Space (Unit: mm (in))
SR-B1.5
Anchor bolts:
M16
Total length: 80 mm (31/8in)
3 pcs.
Approx. 800 mm (2.6 ft)
Approx. 2000 mm (6.6 ft)
SR-B4
Anchor bolts:
M16
Total length: 220 mm (85/8in)
3 pcs.
Approx. 750 mm (2.5 ft)
Approx. 2000 mm (6.6 ft)
NOTE: Anchor bolts are selected with standard seismic intensity: 1, and horizontal
seismic coefficient: 1.
120
120

PCD420
3  o19 bolt hole
/
3  o19 bolt hole
/
3  o19 bolt hole
/
3  o19 bolt hole
/
120
120

PCD520

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
9
Installation Example for Piping to/from the SR-B Unit
Please carefully refer to the "Piping Installation" section described on the following
pages for important points regarding piping arrangements.
* Depending on the specifications, the product may or may not feature an overflow outlet for
the exhaust pipe.

Exhaust Piping
Blowdown/High-Temp. Water Inlet Piping

Boiler Feed Water/
Water Inlet/Outlet Piping


Blowdown/High-Temp. Water Outlet, Overflow,
Body Blowdown and OverflowPiping for
Exhaust Pipe

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
10
Piping Installation 1: Blowdown/High-Temp. Water Inlet Piping
Other cautions
The piping diameter should be sized so that the flow velocity of blowdown/high-temp.
water is approximately 3 m/sec (9.8 ft/sec).
To handle blowdown/high-temp. water without applying back pressure on the boiler
or the equipment where high-temp. water is generated, it is recommended that the
piping be of the same diameter as the SR-B blowdown/high-temp. water inlet piping
(SR-B1.5: 80 mm (3 in), SR-B4: 150 mm (6 in)). Contact TLV if you wish to change
the size of the blowdown/high-temp. water inlet piping.
or falls)
no condensate
accumulation points (places where piping rises

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
11
Piping Installation 2: Blowdown/High-Temp. Water Outlet, Overflow,
Body Blowdown Piping and Overflow Piping for Exhaust Pipe
Other cautions
When back pressure is applied to the SR-B, it also affects the upstream equipment
from which blowdown/high-temp. water is recovered. Even though piping with the
same diameter as the overflowpiping and blowdown/high-temp. water outlet piping of
the SR-B is recommended to prevent back pressure from being applied to the SR-B, it
is possible to use a smaller pipe diameter depending on the length of the pipe to the pit
or discharge destination. Suggested diameters for the overflow piping and
blowdown/high-temp. water outlet piping are as follows:
When the valve is installed at the overflow piping, blowdown/high-temp. water outlet
piping or the overflow piping for exhaust pipe, make sure to use either a full-bore
ball valve or a gate valve so that back pressure does not interfere with the operation
of the SR-B.
Pipe Length to Pit or Recovery
Destination
Less than
10 m (33 ft)
10 m to 50 m
(33 ft to 164 ft)
Greater than
50 m (164 ft)
Outlet Pipe Diameter (SR-B1.5)
25 mm (1 in)
40 mm (11/2in)
50 mm (2 in)
Outlet Pipe Diameter (SR-B4)
40 mm (11/2in)
50 mm (2 in)
65 mm (21/2in)
* Depending on the specifications, the product may or may not feature an overflow outlet for
exhaust pipe. Products without an overflow outlet should be fitted with an overflow line of
nominal diameter 10 mm (3/8 in) or more.
without any rise in the piping
without any rise in the
piping

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
12
Piping Installation 3: Exhaust Piping
Other cautions
Be certain to connect exhaust piping to protect against instances of unexpectedly
high-volume blowdown /high-temp. water flow into the SR-B, which may cause flash
steam and hot water to be discharged.
When back pressure is applied to the SR-B, it also affects the boiler or the equipment
where high-temp. water is generated.
To prevent putting back-pressure on the boiler or the equipment where high-temp.
water is generated, make exhaust piping as large in diameter, short, and with as few
bends as possible.
Even though piping with the same diameter as the exhaust piping of the SR-B is
recommended to prevent putting back pressure on the SR-B, it is possible to use a
smaller pipe diameter depending on the length of the pipe to the pit or recovery
destination.
Suggested diameters for the exhaust piping are as follows:
Model
Length & Diameter of Exhaust Piping
Less than
10 m (33 ft)
10 m to 20 m
(33 ft to 66 ft)
20 m to 30 m
(66 ft to 98 ft)
Greater than
30 m (98 ft)
SR-B1.5
50 mm (2 in)
80 mm (3 in)
100 mm (4 in)
150 mm (6 in)
SR-B4
80 mm (3 in)
100 mm (4 in)
150 mm (6 in)

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
13
Connecting the duct piping to the exhaust outlet
The standard connection specification of the exhaust outlet for the SR-B is “duct
piping installable”.
Nipple fittings should be used to connect the SR-B and the piping, making sure that
there is no leakage.
Piping example
①All duct piping should withstand high temperatures of 100 C (212 F).
Coat the nipple with duct sealant.
②Insert the nipple into the SR-B, then the duct piping into the nipple.
After everything is set in place, fix with screws (screw holes on the SR-B: M5  2
places).
③After fixing with screws, wrap with two or three layers of tape that can withstand
the required heat.



About exhaust outlet/options
The exhaust outlet of the SR-B can be produced with a flange connection as an
option. However, specification changes after delivery cannot be accepted.
The exhaust piping should be supported firmly, making sure to avoid excessive
force on the SR-B.(Excessive force may lead to damage to the SR-B.)
In cases where the piping is welded directly to the exhaust outlet
C3 chamfering has been performed on the exhaust outlet. When welding is
performed on the exhaust outlet, the connecting tube should also be chamfered and
butt welded. Furthermore, the piping thickness of the exhaust outlet will be “Sch40”.

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
14
Screw holes on the exhaust port
Two M5-sized screw holes are
opened on either side of the exhaust
port, intended for use with the
standard duct connection.

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
15
Piping Installation 4. Boiler Feed Water/Water Inlet and Outlet Piping
Other cautions
Connect the cold water piping to the cold water inlet, and connect return piping from
the hot water outlet to an area where the hot water can be utilized. To secure an
adequate amount of cold feed water, make sure that the hydraulic pressure
differential (pressure differential between inlet and outlet) is at least equal to the
values in the following table. However, the water pressure must not exceed the
maximum operating water pressure of 1.0 MPaG (150 psig).
Required Cold Water (t/h)
1
2
3
4
5
6
8
10
Hydraulic Pressure
Differential (MPa)
SR-B1.5
0.03
0.11
0.23
0.40
0.62
—
—
—
SR-B4
—
—
0.03
0.05
0.07
0.10
0.17
0.27
(1 MPa = 10.197 kg/cm2)
Required Cold Water (lb/h)
2000
4000
6000
8000
10000
12000
16000
20000
Hydraulic Pressure
Differential (psi)
SR-B1.5
3.6
12.9
27.8
48.2
74.0
—
—
—
SR-B4
—
—
3.4
5.8
8.7
12.3
21.2
32.4
The diameter of the pipe before and after the SR-B varies with the required amount of
cold water, and it should be sized so that the velocity of cold water is 2 to 3 m/sec (6.6
to 9.8 ft/sec). Suggested diameters for the cold water inlet and hot water outlet piping
are as follows:
Water Flow (t/h)
1
2
3
4
5
6
7
8
10
Pipe Diameter (mm)
15
15
20
25
25
32
32
32
40
Water Flow (lb/h)
2000
4000
6000
8000
10000
12000
1400
0
16000
20000
Pipe Diameter (in)
1/2
1/2
3/4
1
1
11/4
11/4
11/4
11/2

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
16
Operation
Install properly and DO NOT use this product outside the recommended
operating pressure, temperature and other specification ranges.
Improper use may result in such hazards as damage to the product or
malfunctions which may lead to serious accidents. Local regulations
may restrict the use of this product to below the conditions quoted.
CAUTION
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from the
discharge of fluids.
CAUTION
Operate valve slowly and carefully. Opening or closing valves too quickly
may cause water hammer to occur, the impact of which could cause
damage to equipment.
CAUTION
To be performed after installation and before initial operation
Make sure to flush the piping to remove welding slag, metal powder and filings.
Make sure that flange bolts etc. are securely tightened before passing steam/
water through the SR-B.
When conducting the test operation, start with a low water flow rate and gradually
increase the load to normal operating conditions. If you start with a normal operating
load at the outset and there is a leak somewhere in the piping, there is a risk of high-
temp. water, boiler feed water or hot water blowing out.
Startup
Make sure that the boiler feed water/cold water inlet valve (A) and boiler feed
water/hot water outlet valve (B) are open before supplying blowdown/high-
temperature water to the SR-B.
If blowdown/high-temperature water is supplied while the boiler feed water/cold water
inlet valve (A) and boiler feed water/hot water outlet valve (B) are closed, the
pressure inside the coil will increase due to volume expansion, which could damage
the boiler feed water/cold water inlet valve (A) and boiler feed water/hot water outlet
valve (B).
1. Make sure that the body blowdown valve
(D) in the base of the SR-B is closed.
2. Open the boiler feed water/cold water
inlet valve (A) and boiler feed water/hot
water outlet valve (B), allowing
boiler feed water or cold water
to pass through the SR-B. In
cases where either TIC
(temperature control of heated
water) or FIC (flow control of
heated water) is used, start up
the controls.
3. Open any valves downstream
from the blowdown/high-temp.
water outlet valve (C), if any.
4. Open the blowdown/high-
temp. water inlet valve, if any.
A
Boiler feed water/cold water inlet valve
B
Boiler feed water/hot water outlet valve
C
Blowdown/high-temp. water outlet valve
D
Body blowdown valve
AD
C
B

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
17
5. Startup the equipment to allow blowdown/high-temp. water to enter the SR-B.
Make sure that there are no abnormal discharges from the exhaust outlet or
overflow outlet for exhaust pipe*, such as high-temp. water. If there is high-temp.
water blowing, or an abnormal sound or vibration, halt operation immediately.
The first time you operate the SR-B, or when operating with the body blowdown
valve (D) open, flash steam may be discharged to the atmosphere through the
exhaust outlet or overflow outlet for exhaust pipe* immediately after initiating
operation, due to the lack of pooled high-temp. water in the base to create an
airtight water seal over the condensate outlet. (if flash steam blow stops shortly then
everything is normal)
* Depending on the specifications, the product may or may not feature an overflow outlet for
the exhaust pipe.
Shutdown
1. Stop the equipment, making sure that there is no flow of high-temp. water.
2. Close the boiler feed water/cold water inlet valve (A) and boiler feed water/hot
water outlet valve (B) to stop the inflow of boiler feed water or cold water. At this
point, make sure to close the valve slowly not rapidly. (If the valve is closed
rapidly, water hammer will occur, resulting in impacts to the SR-B and the
surrounding piping.)
3. When the SR-B is to be shutdown for long periods of time, discharge all
blowdown/high-temp. water by opening the body blowdown valve (D) at the
bottom of the body.

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
18
Inspection and Maintenance
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
As the SR-B is an atmospheric type heat exchanger, there is no particular need to
perform the kind of maintenance inspections required for pressure vessels.
However, if the heat exchanging performance declines, verify that the boiler feed
water/cold water and blowdown/high-temp. water flow quantities are in compliance
with the rated capacities. If they are not in compliance, correct the flow quantities. If
there are no irregularities with the flow quantities, perform the following inspection:
Annual inspection and cleaning is recommended to prolong the product’s service life.
Inspection at boiler feed water/hot-cold water side
1. Perform a reverse-flow chemical cleaning by pouring cleaning solution in through
the boiler feed water/hot water outlet valve on the SR-B, then discharging the
solution through the cold water inlet valve.
Inspection at blowdown/high-temp. water side
1. Remove the plug from the inspection opening and check the condition inside the tank.
2. If the inspection reveals heavy grime, close the blowdown/high-temp. water outlet,
body blowdown outlet, and overflow outlet and perform chemical cleaning by
pouring cleaning solution through the exhaust outlet of the SR-B.

172-65603MA-08 (SR-B1.5/SR-B4) 5 Oct 2021
19
Troubleshooting
Take measures to prevent people from coming into direct contact with
product outlets. Failure to do so may result in burns or other injury from
the discharge of fluids.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
When the product fails to operate properly, use the following table to locate the cause
and remedy.
Problem
Cause
Remedy
High-temp.
water or flash
steam blows
from the
exhaust outlet
or the overflow
outlet for
exhaust pipe
Little or no flow of cold water for
heat recovery
Correct water flow
Blowdown/high-temp. water flow
exceeds rated capacities
Control the flow or add another
heat exchanger
Accumulation of scale, etc. on
the heat transfer coils
Clean
The heat-
recovery water
does not
become hot
Not enough blowdown/high-temp.
water flow
Secure the proper blowdown/
high-temp. water flow
Quantity of cold water for heat-
recovery is too great
Reduce flow
Accumulation of scale, etc. on
the heat transfer coils
Clean
Blowdown/
high-temp.
water cannot
flow smoothly
or there is
back-pressure
on the boiler
or the
equipment
where high-
temp. water is
generated
There is a clog in the blowdown/
high-temp. water inlet piping
Remove the clog
Check piping arrangement
Little or no flow of water for heat
recovery
Correct water flow
Accumulation of scale, etc. on
the heat transfer coils
Clean
Incorrect piping at exhaust outlet
Correct the piping; see the
“Piping Installation 3”section