LAARS Stor User Manual
NDIRECT-FIRED
I
WATER HEATER
A Spanish language version of these instructions is available by contacting
the manufacturer listed on the rating plate.
La version espanola de estas instruccions se puede obtener al escribirle a
la fábrica cuyo nombre aparece in la placa de especificaciones.
WARNING
To avoid damage or injury, there
must be no materials stored
against the indirect water heater
and proper care shall be taken to
avoid unnecessary contact
(especially by children) with the
indirect water heater.
Do not store or use
gasoline or other
flammable liquids in
the vicinity of this
water heater or any
other appliance.
INSTALLATION/OPERATING MANUAL
WITH PARTS LISTING AND TROUBLESHOOTING GUIDE
For your family’s comfort, safety, and convenience, we
recommend this water heater be installed and serviced by a
plumbing professional.
238-43480-00E REV 01/08
Doc. 11045
CONGRATULATIONS!
You have just purchased one of the finest water heaters
on the market today!
This installation, operation, and instruction manual will
explain in detail the installation and maintenance of your
new Indirect water heater. We strongly recommend that
you contact a plumbing professional for the installation of
this water heater.
We require that you carefully read this manual, as well as
the enclosed warranty, and refer to it if questions arise.
If you have any specific questions concerning your
warranty, please consult the plumbing professional from
whom your water heater was purchased. For your
records we recommend that you write the model, serial
number and installation date of your water heater in the
back of this manual.
This manual should be kept with the water heater.
We’re committed to providing you with the finest water
heater made.
2
CAUTION
The maximum boiler water supply temperature to the indirect heat
exchanger must not exceed 240°F (115°C).
NOTICE
Insulation blankets are not required for this water heater. This
water heater meets or exceeds the ASHRAE/IES 90.1b standards with
respect to insulation and standby loss requirements.
I- IMPORTANT INFORMATION…………….….. 4
II- SPECIFICATIONS………………………………. 8
III- GENERAL INFORMATION……………………. 12
IV- PRE-INSTALLATION…………………………… 15
V- WATER CONNECTIONS……………………….. 20
VI- ELECTRICAL CONNECTIONS……………….. 25
VII- OPERATING INSTRUCTIONS………………… 26
VIII- MAINTENANCE…………………………………. 29
IX- TROUBLESHOOTING GUIDE………………… 32
TABLE OF CONTENTS
X- PARTS LIST………………………………………. 34
XI- NOTES…………………………………………….. 36
3
SECTION I
IMPORTANT INFORMATION
-READ CAREFULLY-
The equipment must be installed in accordance with those
installation regulations required in the area where the installation
is to be made. These regulations must be carefully followed in
all cases. Authorities having jurisdiction shall be consulted
before installations are made.
All wiring on water heaters installed in the USA must be in
accordance with the National Electrical Code and/or local
regulations; or in Canada, installed in accordance with the
Canadian Electrical Code and/or local regulations.
The following terms are used throughout this manual to bring
attention to the presence of hazards of various risk levels, or to
important information concerning product life.
DANGER
Indicates an imminently
hazardous situation, which,
if not avoided, will result in
death, serious injury, or
substantial property
damage.
WARNING
Indicates a potentially
hazardous situation, which,
if not avoided, could result
in death, serious injury, or
substantial property
damage.
Indicates a potentially
hazardous situation, which,
if not avoided, may result
in moderate, or minor
injury or property damage.
Indicates special
instructions on installation,
operation or maintenance,
which are important but
not related to personal
injury hazards.
CAUTION
NOTICE
4
Important Information continued-
DANGER
DO NOT store or use gasoline or other flammable, combustible, or
corrosive vapors and/or liquids in the vicinity of this or any other
appliance.
IF YOU SMELL GAS:
DO NOT try to light any appliance.
DO NOT touch any electric switch; do not use any
telephone in your building.
Immediately call your gas supplier from a telephone in another
building. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the fire department
DO NOT OPERATE THE APPLIANCE UNTIL THE LEAKAGE IS
CORRECTED!
Liquefied petroleum gas/propane gas is heavier than air and will
remain at floor level if there is a leak. Basements, crawl spaces,
closets, and areas below ground level will serve as pockets for
accumulation of leaking gas.
This water heater is supplied with an adjustable thermostat to control
water temperature. Hot water temperatures required for automatic
dishwasher and laundry use can cause scald burns resulting in serious
personal injury and/or death. The temperature at which injury
occurs varies with the person’s age and the time of exposure. The
slower response time of disabled persons increases the hazards to
them.
their own bath water.
NEVER
allow small children to use a hot water tap or to draw
NEVER
leave a child or disabled person
unattended in a bathtub or shower.
5
Important Information continued-
WARNING
Installation is not complete unless a pressure and temperature
relief valve is installed into the side of the water heater. See the
Water Connections section of this manual for details.
This water heater contains very hot water under high pressure.
Do not unscrew any pipe fittings or attempt to disconnect any
components of this water heater without positively assuring the
water is cool and has no pressure. Always wear protective
clothing and equipment when installing, starting up, or servicing
this water heater to prevent scald injuries. Do not rely on the
pressure and temperature gauges to determine the temperature
and pressure of the water heater. This water heater contains
components that become very hot. Do not touch any components
unless they are cool.
Improper installation, adjustments, alteration, service or
maintenance can cause property damage, personal injury or loss
of life. Failure to follow all instructions in the proper order can
cause personal injury or death. Read and understand all
instructions, including all those contained in component
manufacturer’s manuals, which are provided with the appliance
before installing, starting-up, operating, maintaining, or
servicing this appliance. Keep this manual and literature in
legible condition and posted near the appliance for reference by
owner and service technician.
This water heater requires regular maintenance and service to
operate safely. Follow the instructions contained in this manual.
Installation, maintenance, and service must be performed only
by an experienced, skilled, and knowledgeable installer or service
agency.
To comply with NSF requirements this water heater is to be:
a) Sealed to the floor with sealant, in a smooth and easily
cleanable way, or
b)
Installed with an optional leg kit that includes legs and/or
extensions that provide a minimum clearance of 6”
beneath the water heater.
6
Important Information continued-
WARNING
It is the responsibility of the installing contractor to see that all
controls are correctly installed and are operating properly when
the installation is complete.
DO NOT operate the water heater with jumpered or absent
controls or safety devices.
DO NOT tamper with or alter the water heater and/or controls.
DO NOT operate the water heater if any external part has been
under water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the control
system that was under water.
This water heater is suitable for installation on combustible
flooring. DO NOT install this water heater on carpeting.
DO NOT operate this water heater without first being certain it
is filled with water.
Flammable items, pressurized containers, or any other potential
fire hazardous articles must never be placed on or adjacent to the
heater. Containers of flammable gases should not be stored or
used in the same room with this water heater.
Hydrogen gas can be produced in an operating water heater that
has not had water drawn from the tank for a long period of time
(generally two weeks or more). Hydrogen gas is extremely
flammable. To prevent the possibility of injury under these
conditions, we recommend that the water faucet be opened for
several minutes at the kitchen sink before you use any electrical
appliance that is connected to the hot water system. If hydrogen
is present, there will be unusual sounds such as air escaping
through the pipes as hot water begins to flow. Do not smoke or
have open flame near the faucet at the time it is open.
7
SECTION II
SPECIFICATIONS
Figure 1 – Tank Layout
Table 1: Water Heater Dimension (Inches)
MODEL A B C D E F
30-Gal. / Res. 22 33-5/8 28-1/4 34-3/8 5-3/8 27-1/2
40-Gal. / Res. 24 36 29-3/4 36-3/4 5-3/8 27-1/2
40-Gal. “R” / Res. 22 41-1/8 34-3/8 41-7/8 5-3/8 27-1/2
50-Gal. / Res. 26 36 29-3/4 36-3/4 5-3/8 27-1/2
50-Gal. “R” / Res. 22 46-1/4 40-1/8 47 5-3/8 27-1/2
65-Gal. / Res. 22 59-1/4 53-1/8 60 5-3/8 27-1/2
65-Gal. / Com. 22 59-1/4 53-1/8 60 5-3/8 47-3/4
80-Gal. / Res. 24 59 52-7/8 59-3/4 5-3/8 27-1/2
80-Gal. / Com. 24 59 52-7/8 59-3/4 5-3/8 47-3/4
120-Gal. / Com. 28-1/4 62-1/2 55-3/4 63-1/4 6-3/8 28-1/2
120-Gal. / Com. 28-1/4 62-1/2 55-3/4 63-1/4 6-3/8 48-3/4
8
Specifications continued-
Table 2: Water Heater Capacities
MODEL
30-Gal. / Res.
40-Gal. / Res.
40-Gal. “R” / Res.
50-Gal. / Res.
50-Gal. “R” / Res.
65-Gal. / Res.
65-Gal. / Com.
80-Gal. / Res.
80-Gal. / Com.
120-Gal. / Res.
120-Gal. / Com.
Tank
Capacity
(Gal)
Coil
Volume
(Gal)
Dry Weight
(Lbs)
Wet Weight
(Lbs)
30 2.7 140 404
40 2.7 172 500
38 2.7 172 486
50 2.7 196 610
48 2.7 180 576
60 2.7 196 704
58 5.0 265 768
75 2.7 224 861
73 5.0 293 920
116 2.7 355 1324
114 5.0 415 1370
Table 3: Water Heater Ratings
MODEL
30-Gal. / Res.
40-Gal. / Res.
40-Gal. “R” / Res.
50-Gal. / Res.
50-Gal. “R” / Res.
65-Gal. / Res.
65-Gal. / Com.
80-Gal. / Res.
80-Gal. / Com.
120-Gal. / Res.
120-Gal. / Com.
First Hour
Rating
(Gal/Hr)
255 235 1.2 157,000
260 235 1.1 157,000
260 235 1.1 157,000 13.7
265 235 0.9 157,000
265 235 0.9 157,000 13.7
275 235 0.8 157,000
405 370 0.8 245,000 14.0
295 235 0.6 157,000 13.7
415 370 0.6 245,000 14.0
315 235 0.4 157,000 13.7
445 370 0.4 245,000 14.0
Continuous
Draw Rating
(Gal/Hr)
Standby
Heat Loss
Rating
(°F/Hr)
Minimum Heat
Output Rate of
the Heat Source
(BTU/Hr)
Minimum
Heat Source
Flow Rate
(Gal/Min)
13.7
13.7
13.7
13.7
NOTES: These ratings were obtained with a heat source output rate
and flow rate as specified in Table 3 and a 180°F boiler water supply
temperature. Other results will be obtained under different conditions.
9
Specifications continued-
Table 4: Water Heater Performance
MODEL
30-Gal. / Res.
Maximum First
Hour Rating
(Gal/Hr) @
140 °F 115 °F
279 429 4.2 6.7 220,000
Continuous
Draw Rating
(Gal/Min) @
140 °F 115 °F
Approximate
Boiler Output
Needed For
Ratings
(BTU/hr)
40-Gal. / Res.
40-Gal. “R” / Res.
50-Gal. / Res.
50-Gal. “R” / Res.
65-Gal. / Res.
65-Gal. / Com.
80-Gal. / Res.
80-Gal. / Com.
120-Gal. / Res.
120-Gal. / Com.
288 438 4.2 6.7 220,000
288 438 4.2 6.7 220,000
297 447 4.2 6.7 220,000
297 447 4.2 6.7 220,000
306 456 4.2 6.7 220,000
534 820 8.0 12.8 420,000
321 470 4.2 6.7 220,000
546 834 8.0 12.8 420,000
357 507 4.2 6.7 220,000
583 871 8.0 12.8 420,000
NOTES: Based on 200 °F boiler water temperature and 50 °F potable
water inlet temperature.
Table 5: Water Heater Performance
MODEL
Hot Water
Availability
(Minutes)
Coil Heat
Transfer Area
(Sq Ft)
Pressure Drop at
Rated Heat Source
Flow Rate
(Feet of Head)
30-Gal. / Res.
40-Gal. / Res.
40-Gal. “R” / Res.
50-Gal. / Res.
50-Gal. “R” / Res.
65-Gal. / Res.
65-Gal. / Com.
80-Gal. / Res.
80-Gal. / Com.
120-Gal. / Res.
120-Gal. / Com.
5.5
7.5
7.5
9.0
9.0
11.0
10.5
13.5
13.2
20.8
20.6
10
14.2
14.2
14.2
14.2
14.2
14.2
27.2
14.2
27.2
14.2
27.2
1.5
1.5
1.5
1.5
1.5
1.5
5.0
1.5
5.0
1.5
5.0
Specifications continued-
NOTICE
If the boiler takes longer to heat up from a cold start than the
water availability as noted above, hot water shortage may occur.
Hot water availability is based off drawing 80% of the heated
tank volume at 4 gallons per minute flow rate.
The maximum heat transfer through the coil (heat input) of the
water heater at 240°F boiler water supply temperature and 210°F
potable water temperature is 94,100 Btu/hr for residential models
and 180,300 Btu/hr for commercial models. Potable water
temperature is limited to below 210°F and nominal watercontaining capacity is below 120 gallons for all indirect-fired
models.
Accordingly, per Part HLW-101.2, Section IV of the ASME
Boiler and Pressure Vessel Code, all indirect-fired products
listed are exempted from compliance with the code.
11
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