Dunkirk ARTESIAN 220, ARTESIAN 340 Installation And Operating Instructions Manual

ARTESIAN 220 & 340

Instantaneous Indirect Water Heater

By Dunkirk Boilers

• INSTALLATION AND
OPERATING INSTRUCTIONS

• ENGINEERING MANUAL

Manufacturer's Warning

Page 2

To reduce the possibility of injury due to scalding, a thermostatic mixing
valve should be installed on all installations. Failure to do so will result
in domestic water being delivered to the faucets at a temperature
equivalent to the boiler water.
All commercial installations requiring sustained water temperatures
beyond 120°F, must label all fixtures alerting water users of a potential
scalding hazard.

CONTENTS pg

Page 3

I. Product Description................................................................................................ 4

II. Specifications......................................................................................................... 4

III. Sizing A Water Heater For Installation................................................................ 7

Method A - Quick Residential............................................................................. 8

Method B - Detailed Residential........................................................................ g

Method C - Commercial....................................................................................13

IV. Before Starting Installation................................................................................19

V. Locating the Water heater..................................................................................19

VI. Piping ..................................................................................................................20

Zone Design

Boiler Side Piping .............................................................................................21

Domestic Piping ................................................................................................29

VII. Wiring..................................................................................................................33

VIII. Start-up and Check-out....................................................................................40

Appendix A.........................................................................................................40

I. Product Description

Page 4

The Indirect water heater is designed to generate domestic hot water in conjunction with a hot water
boiler using forced boiler water circulation. This indirect water heater consists of a plain steel tank in
which three smooth copper coils are located. The tank surrounded by 2" of Poly - urethane foam
insulation, which is surrounded by an enamel coated plain steel jacket.
The boiler water pumps through the tank and heats the domestic water in the coils.

Specifications

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Ill. Sizing The Hot Water Heater For Installation

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IMPORTANT

The following procedures are used to size indirect water heaters based on the amount of
hot water required during a given hour. In doing so, it is assumed that this demand will be
spread out over the course of the entire hour.

THESE SIZING PROCEDURES ARE PROVIDED AS A GUIDE TO ASSIST THE PROFESSIONAL
CONTRACTOR IN SIZING THE WATER HEATER. BECAUSE OF THE LARGE VARIETY OF
DEMAND SITUATIONS ENCOUNTERED IN THE FIELD, THE MANUFACTURER CANNOT
GUARANTEE THE SUITABILITY OF THESE PROCEDURES TO ALL INSTALLATIONS.

To properly apply the water heater to a particular system, the following 3 steps must be done:

1) Determine the domestic hot water requirements

2) Select the correct water heater/ boiler combination

3) Select a pump, zone piping size, and control system to provide proper water flow from
the boiler through the water heater tank.

This manual presents three methods of sizing this water heater:

Method A: Quick Residential

Method B: Detailed Residential

Method C: Commercial

Note:
The terms gross output and heating capacity are used interchangeably in this manual. Heating

Capacity is the gross output of boilers of less than 300,000 Btu/Hr input as defined by D.O.E. test
procedures. Gross Output is the term generally used with boilers of greater than or equal to
300,000 Btu/Hr. input.

Method A: Quick Residential Sizing Method

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Table 4 shows some typical structures under which many single residence applications can be
classified. This procedure will provide satisfactory results most of the time. Where greater accuracy
is desired, use Method B.

1) Find the description that best fits the job and select the Water heater called for. Also, note the
required boiler output under column (F).

2) The Water heater must be installed with a boiler having a gross output (DOE heating capacity)
greater than or equal to that shown in column (F) of Table 4. If the Water heater is to be used with
a boiler having a gross output less than that shown in table 4, use Method B.

If a boiler is to be installed with a water heater, first find a boiler, which will handle the space­heating load alone. If this boiler has a DOE heating Capacity greater than that shown in column
(F) of table 4, do not add anything to the boiler selected for the Artesian.

If the boiler required for space heating alone has a DOE heating capacity less than that called
for in column (F) of table 4, increase the size of the boiler selected to one with a DOE heating
capacity greater than or equal to that show in column (F).

3) See figures 5-7 for more information on designing a water heater zone system. It is recommended
that the zone be given priority.

Method B Detailed Residential Sizing Method Directions

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1) Record the total number of each type to fixture in column (c) of worksheet 1. A shower head is
installed over a bathtub, count both the bathtub and shower head although only one fixture will
be used at a time.

2) For each line, multiply the quantity entered in column (c) by the corresponding number in column
(b). Enter the result in column (d).

3) Total column (d). This is the PEAK HOUR DEMAND

4) Multiply the Peak Hour Demand by 1.20. This is the adjusted peak hour demand

5) Select the water heater based on:

a) If a new boiler is to be installed with the Artesian:

* Go to table 1 and select a water heater which has a 140°F first hour rating greater than or

equal to the adjusted peak hour demand calculated on work sheet 1.

* Refer to required boiler output in Table 1. Record the required boiler output (heating

capacity) for the selected water heater in your work sheet.

* Determine the boiler required to satisfy the space heating requirement alone by

multiplying the space heating load by 1.15. Record this, as the boiler heating capacity
required for space heating in your work sheet.

* Select the boiler with the larger of the above two heating capacities.

b) If the water heater is to be installed with an existing boiler:

* Go to table 1 and select a water heater which has a 140°F first hour rating greater than or

equal to the adjusted peak hour demand calculated above.

If the required boiler output for the selected water heater is greater than the heating

capacity of the existing boiler; the existing boiler is too small.

6) If a Whirlpool is on the job, see Appendix A.

7) Designing the water heater zone system. Refer to Table 1 for minimum boiler water flow, and
circulator sizing. For further information on zone systems refer to figures 4-9.

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Method B - Detailed Residential Sizing Sample Calculations

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Example 1

A water heater is to be installed with a new boiler. The residence has the following fixtures: Bath
#1 Bath #2

3 GPM Shower Head Vanity
30 Gal. Bathtub
Vanity

Kitchen Laundry

Kitchen Sink Clothes Washer
Automatic Dishwasher

The heat loss of the house is 80,000 BTU/hr

Note:

Although a four section boiler would be capable of heating the house (Net Rating = 82,000 BTU/hr),
its DOE heating capacity is only 94,000 BTU/hr (Need 110,000 Btu/hr). For this reason, install a
five section boiler that has a heating capacity of 125,000 BTU/hr.

Solution:
The completed sizing sheet for this example is shown in figure 2. The adjusted peak hour demand

is 145 gallons per hour. From table 1, we see that a water heater 220 will fulfill this requirement
with the appropriate boiler. Refer to Table 1 for required boiler output. If the model 220 is used in
combination with a boiler capable of producing 110,000 Btu / hr. The output will give you 156 GPH
first hour ratings. The circulator on the boiler must be capable of producing 3.4 GPM.

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