\* \* \* \* \* \* \* \* \* \*

READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

\* \* \* \* \* \* \* \* \* \*

[DIVISION 15: MECHANICAL]{.underline}

SECTION 15755 ‑ HEAT EXCHANGERS

USE: Furnishing and installing steam water or water to water heat
exchangers.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:** Location and detail drawings as needed.

**REQUIRED SPEC MODIFICATIONS:**

[GENERAL NOTES]{.underline}

A. Whenever entire articles, paragraphs or subparagraphs are not
applicable, the articles, paragraphs or subparagraphs should be deleted;
when necessary, reletter or renumber articles, paragraphs or
subparagraphs.

B. THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE
SECTION.

[TECHNICAL NOTES]{.underline}

A. 1.1B: Select or add applicable specification sections. Do not list
specification sections from Division 15.

B. 1.2: Select or add applicable references.

C. 1.3A: Select applicable words.

D. 1.4B: Insert number of copies of the manufacturer\'s descriptive data
required. Normally 5 copies are required. Distribution after review is
normally 1 copy to the COR, 3 copies to the Contractor, and 1 copy to
the project file.

E. 1.4C: Insert number of copies of the manufacturer\'s installation
instructions required. Normally 5 copies are required. Distribution
after review is normally 1 copy to the COR, 3 copies to the Contractor,
and 1 copy to the project file.

F. 1.4D: Insert number of copies of the manufacturer\'s maintenance
instructions required. Normally 5 copies are required. Distribution
after review is normally 1 copy to the COR, 3 copies to the Contractor,
and 1 copy to the project file.

G. 1.4E: Insert number of copies of shop drawings required. Normally 5
copies are required. Distribution after review is normally 1 copy to the
COR, 3 copies to the Contractor, and 1 copy to the project file.

H. 1.4F: Insert number of copies of performance data required. Normally
5 copies are required. Distribution after review is normally 1 copy to
the COR, 3 copies to the Contractor, and 1 copy to the project file.

I. 2.1B: Select applicable words.

J. 2.3A: Select applicable words.

K. 3.2A: Complete schedule.

L. 4.1 and 4.2: When a \"lump sum\" Contract is used, delete the title
PART 4: MEASUREMENT AND PAYMENT, and both articles from this section.
Measurement and payment will be addressed in Part 4 of Section 01010
-Summary of Work.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 02/91

SECTION 15755

HEAT EXCHANGERS

[PART 1: GENERAL]{.underline}

1.1 SUMMARY:

A. ab Section Includes: Furnishing and installing the \[steam to water\]
\[water to water\] heat exchangers.

1\. 2 REFERENCES:

A. American Society of Mechanical Engineers:

ASME BPVC-89 Boiler and Pressure Vessel Codes, Section VIII, Rules for
Construction of Pressure Vessels, Division 1, Subsections A, B, and C

ASME PTC 25.3-76 Safety and Relief Valves

1.3 SYSTEM DESCRIPTION:

A. abOperation: The heat exchangers used in the system shall be used for
\[domestic water preheating\] \[heating water to be used in the HVAC
system\]. \[High\] \[Low\] \[pressure steam\] \[hot water\] will be used
as the heating medium for this system.

1.4 SUBMITTALS:

A. ab General: Submittals shall be according to Section 01300 -
Submittals.

B. ab Manufacturer\'s Literature: Submit \[\_\_\_\_\] copies of the
manufacturer\'s descriptive data for the heat exchanger to be used on
this project.

C. ab Installation Instructions: Submit \[\_\_\_\_\] copies of the
manufacturer\'s installation instructions for the heat exchanger to be
used on this project.

D. ab Shop Drawings: Submit \[\_\_\_\_\] copies of shop drawings for the
heat exchanger to be used on this project. \[Shop drawings shall show
dimensions, locations and size of tappings.

E. ab Performance Data: Submit \[\_\_\_\_\] copies of \[curves\]
\[calibration charts\] \[\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\] showing the
performance characteristics of the heat exchanger to be used on this
project.

[PART 2: PRODUCTS]{.underline}

2\. 1 MATERIALS:

A. Tubes: U‑tube type with 3/4‑inch O.D. seamless copper tubes suitable
for 125 psi working pressure.

B. Heads: \[Cast iron\] \[Steel\], with \[steel\] \[bronze\] tube
sheets, \[threaded\] \[flanged\] for piping connections.

C. Shell: Shall be steel.

2.02 FABRICATION:

A. Heat Exchanger: Fabrication shall conform to ASME BPVC.

B. Water Chamber and Tube Bundle: Shall be removable for inspection and
cleaning.

C. Coating: Prime coat exterior.

2.3 SHELL AND TUBE TYPE HEAT EXCHANGER:

A. Shell: Steel shell, with \[threaded\] \[flanged\] piping connections
and required tappings.

B. Stand: Provide steel saddle and attaching U‑bolts.

C. abFluid: Design shall be for heating fluid in shell and heated fluid
in tubes.

2.4 STEAM TO WATER HEAT EXCHANGER TRIM:

A. Temperature Regulator: Provide for temperature regulator sensor at
water outlet.

B. Relief Valve: Provide ASME PTC 25.3 rated pressure and temperature
relief valve on water outlets.

C. Tappings: Provide thermometers and tappings in water inlet and
outlet. Provide vacuum breaker and pressure gauge tapping in shell as
shown on the drawings.

D. Steam Relief Valve: Provide ASME PTC 25.3 rated pressure relief valve
on steam inlet on downstream side of control valve.

E. Drain: Provide valved drain.

2.5 WATER TO WATER HEAT EXCHANGER TRIM:

A. Sensors: Provide for temperature regulator sensor at heated water
outlet.

B. P and T Valve: Provide ASME PTC 25.3 rated pressure and temperature
relief valve on heated water discharge as shown on the drawings.

C. Tappings: Provide thermometers and pressure gauge tappings on water
inlets and outlets.

D. Relief Valve: Provide ASME PTC 25.3 rated pressure relief valve on
water inlet on downstream side of control valve.

E. Drain: Provide valved drain.

[PART 3: EXECUTION]{.underline}

3.1 INSTALLATION:

A. Location: Install heat exchangers as close as possible to the
location shown on the drawings.

B. Tube Removal: Install so that tube bundle can be removed without
disturbing equipment or piping.

C. Drain: Pipe drains to the nearest floor drain.

D. Supports: Provide supports, saddles, or hangers as shown on the
drawings for supporting the heat exchanger at the height indicated.

3.2 SCHEDULES:

A. Heat Exchanger Schedule: Listed below is a schedule of the heat
exchanger units with the physical and operating characteristics of each:

Identification:

Location:

Service:

Heating Media

Type:

Entering

Leaving:

Flow:

Fouling Factor:

Working Pressure:

Heated Media

Type:

Entering:

Leaving:

Flow:

Fouling Factor:

Working Pressure:

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

4.1 METHOD OF MEASUREMENT:

A. Units: The work described in this section will not be measured for
payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section
will be made. The Contractor shall include consideration for this item
in the bid price for other items of the Contract.

END OF SECTION