Rheem RS120-64BP User manual

The purpose of this manual is twofold:
one, to provide the installer with the basic
directions and recommendations for the proper
installation and adjustment of the water heater;
and two, for the owner–operator, to explain
the features, operation, safety precautions,
maintenance and troubleshooting of the water
heater. This manual also includes a parts list.
It is very important that all persons who are
expected to install, operate or adjust this
water heater read the instructions carefully
so they may understand how to perform
these operations. If you do not understand
these instructions or any terms within it, seek
professional advice.
Any questions regarding the operation,
maintenance, service or warranty of this
water heater should be directed to the seller
from whom it was purchased. If additional
information is required, refer to the section on
“If you need service.”
Do not destroy this manual. Please read
carefully and keep in a safe place for future
reference.
!
Recognize this symbol as an
indication of Important Safety
Information!
!
California Proposition 65 Warning:
This product contains chemicals
known to the State of California to
cause cancer, birth defects or other
reproductive harm.
AP14490 (12/08)
Use & Care Manual
With Installation Instructions for the Installer
Pumped Solar Water
Heating Systems
This Solar Water Heating system is for the models listed below:
RS80-48BP
RS120-64BP
®
LISTED
786H

Safety Information
Introduction ............ 3, 4
Safety Precautions ....... 5, 6
2
FOR YOUR RECORDS
Write the model and serial numbers here:
Model Number of Solar System Tank: ____________________________________
Serial Number of Solar System Tank:_____________________________________
Model Number of Collector Panel #1: ____________________________________
Serial Number of Collector Panel #1: _____________________________________
Model Number of Collector Panel #2: ____________________________________
Serial Number of Collector Panel #2: _____________________________________
Model Number of Solar System Pump:___________________________________
Serial Number of Solar System Pump:____________________________________
Model Number of Solar System Control:_________________________________
Serial Number of Solar System Control: _________________________________
You can find them on a label on the appliance.
Staple sales slip or cancelled check here.
Proof of the original purchase date is needed to obtain service
under the warranty.
Inside you will find many helpful hints on how to use and
maintain your water heater properly. Just a little preventive
care on your part can save you a great deal of time and money
over the life of your water heater.
You’ll find many answers to common problems in the Before
You Call For Service section. If you review our chart of
Troubleshooting Tips first, you may not need to call for service
at all.
READ THIS MANUAL
Your safety and the safety of others are very important. There
are many important safety messages in this manual and on your
appliance. Always read and obey all safety messages.
!
This is the safety alert symbol. Recognize this symbol
as an indication of Important Safety Information!
This symbol alerts you to potential hazards that can
kill or hurt you and others.
All safety messages will follow the safety alert symbol and
either the word “DANGER”, “WARNING”, “CAUTION” or
“NOTICE”.
These words mean:
!
DANGER An imminently hazardous situation
that will result in death or serious
injury.
!
WARNING A potentially hazardous situation that
could result in death or serious injury
and/or damage to property.
!
CAUTION A potentially hazardous situation that
may result in minor or moderate
injury.
Notice: Attention is called to observe a
specified procedure or maintain
a specific condition.
READ THE SAFETY INFORMATION
Preface
1) Introduction . . . . . . . . . . . . 1
2) System Description and
Operational Principle . . .1
3) Installation Requirements -
General ..............3
4) Installation Requirements -
Specic ..............4
5) Start Up Procedures .....14
6) Three Modes of System
Operation . . . . . . . . . . . 14
7) Isolating the Major
Components and
Shut Down Procedures . 15
8) Summer Vacation
Recommendations . . . . 15
9) Maintenance and
Troubleshooting ......16
10) Solaray System Component
Parts ...............17
11) Estimated Component
Life................19
12) System Model Numbers 19
13) Collector Specications . 20
14) SunEarth Collector Warranty
Statement . . . . . . . . . . . 22

Introduction
Thank you for purchasing a solar water heating
system. It is one of the most effective and trouble-
free systems available today. In addition to reducing
your water-heating bills, it will help preserve precious
natural resources by using free energy from the sun.
As with an electric or gas water heater, your new
solar water heating system operates automatically to
ensure you will always have an ample supply of hot
water. However, there are simple steps you can take
to increase both its efficiency and service life.
This manual provides the manufacturers recommended
procedures for Rheem solar water-heating systems.
The procedures are essential for correct installation,
troubleshooting and maintenance.
Read each section of this manual thoroughly before
beginning work on the system.
!
CAUTION: Changes to the design or intended
use of the Rheem Solar Water Heating System will
void the manufacturers warranty. Installation,
troubleshooting, and maintenance must be
performed by a qualified technician.
This manual will help you get the most out of your
solar water heating system. Please read it carefully
when the installation is complete, and review it from
time to time to refresh your memory about the service
requirements and safety measures.
The Operation section of the manual contains
important information regarding the system procedures
as well as safety measures pertaining to the system. It
is important that you follow these guidelines to ensure
safe, efficient and trouble-free operation.
While the system requires very little maintenance,
there will be a periodic need for some upkeep. The
Maintenance section outlines those requirements for
service, which you may do yourself, as well as those
procedures best performed by a qualified service
technician.
The Troubleshooting section contains steps you can
take if the system is not performing, as it should.
The solar energy system described by this manual,
when properly installed and maintained, meets
the minimum standards established by the Solar
Rating and Certification Corporation (SRCC). This
certification does not imply endorsement or warranty
of this product by the SRCC.
The solar energy system described by this manual,
when properly installed and maintained, meets the
minimum standards established by the Florida Solar
Energy Center, in accordance with Section 377.705,
Florida Statutes. This certification does not imply
endorsement or warranty of this product by the Florida
Solar Energy Center or the state of Florida.
The components of the system include a water storage
tank, solar collector panels, expansion tank, pump
valves and fittings.
In locations which are subject to temperatures below
41°F, a mixture of heat transfer fluid and water
circulates through the solar collector panels. This fluid
is heated by the sun, then circulated through a heat
exchange, heating the potable (drinking) water inside
the storage tank. The heat transfer fluid is a non-toxic,
food-grade liquid, which provides freeze protection
for the closed loop heat transfer loop. It is colored to
differentiate the closed system fluid from the potable
water supply.
This circulation of the heat transfer fluid is
accomplished by a pump and sensors. These solar
water heaters are referred to as closed loop systems.
Your hot water is stored in a steel tank lined with
porcelain enamel and thickly insulated to help
maintain the water temperature throughout the day and
night.
To ensure your hot water supply is never depleted, the
system is equipped with a backup heater or heating
element. When there may be insufficient solar energy,
you are still assured of all the hot water you will need.
While your system is one of the most efficient
available, there are two simple steps you can take to
increase your water-heating cost savings.
3

4
Introduction continued...
Keep the use of the Backup Heater to a Minimum
You can save the most money on your water-heating
bills by using the backup heater on your system as
little as possible. If the sun shines brightly between I0
am and 3 pm, enough heat will normally be generated
to keep the water hot throughout the rest of the day
and night.
However, on days when the sky is cloudy or when
large quantities of hot water are being used, we
suggest that the backup heater be left “ON” overnight
to ensure adequate hot water the next morning.
Try to use Hot Water during Daylight Hours
When possible, schedule heavy hot water use, such
as dish washing, laundry and showers, in the middle
of the day. If hot water usage occurs while the sun is
up, the fresh (cold) water added to the storage tank is
heated more quickly.
When water is used late in the day or at night, the
fresh water entering the tank will be heated by the
element so hot water is available in the morning.

Time/Temperature Relationship in Scalds
Temperature Time To Produce a Serious Burn
120°F More than 5 minutes
125°F 1½ to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1½ seconds
155°F About 1 second
Table courtesy of Shriners Burn Institute
The chart shown above may be used as a guide
in determining the proper water temperature for your home.
!
DANGER: Households with small children, disabled,
or elderly persons may require a 120°F or lower thermostat
setting to prevent contact with “HOT” water.
NOTICE: Mixing valves should be installed to reduce the
point of use water temperature by mixing hot and cold water
in branch water lines. Contact a licensed installer or the local
plumbing authority for further information.
The temperature of the water in the water heater can be regu-
lated by setting the temperature dial of the adjustable surface
mounted thermostat located behind the jacket access panel.
This thermostat controls the
water heater’s heating ele-
ment only. (A separate ther-
mostat should be utilized in
monitoring the temperature
from the collector).
To comply with safety reg-
ulations the thermostat is
factory set at 120° F or less
where local codes require.
!
DANGER: Hotter water increases the potential for Hot
Water SCALDS.
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IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
!
DANGER!
WATER TEMPERATURE SETTING
Safety and energy conservation are factors to be considered when selecting the water
temperature setting of water heater’s thermostat. Water temperatures above 125°F
can cause severe burns or death from scalding. Be sure to read and follow the warnings
outlined on the label pictured below.
5
!
DANGER: Burns from Hot Water and
Steam - Use extreme care when opening relief
valves, charging closed loop, and filling storage
tank.
The electrical element booster thermostat has
been factory set at 50°C (120°F) to reduce the
risk of scald injury. Adjusting the thermostat to a
higher setting is not recommended. Hotter water
increases the potential for Hot Water Scalds.
R
E
S
E
T
R
E
S
E
T
TURN OFF
POWER
BEFORE
SER V I CING
90 °F15 0°F
12 5°F
(66°C)
(52°C)
(32°C)
Reset button
Thermostat
protective
cover
Thermostat
dial pointer

6
IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
!
WARNING!
For your safety, the information in this manual must be followed to minimize the risk
of fire or explosion, electric shock, or to prevent property damage, personal injury, or loss
of life.
Be sure to read and understand the entire Use and Care Manual before attempting
to install or operate this water heater. It may save you time and cost. Pay particular
attention to the Safety Instructions. Failure to follow these warnings could result in
serious bodily injury or death. Should you have problems understanding the instructions
in this manual, or have any questions, STOP, and get help from a qualified service
technician, or the local utility.
FOR INSTALLATIONS IN THE STATE OF CALIFORNIA
California Law requires that residential water heaters must be braced, anchored or
strapped to resist falling or horizontal displacement due to earthquake motions. For
residential water heaters up to 52 gallon capacity, a brochure with generic earthquake
bracing instructions can be obtained from: Office of the State Architect, 1102 Q Street,
Suite 5100, Sacramento, CA 95814 or you may call 916-445-8100 or ask a water heater
dealer.
However, applicable local codes shall govern installation. For residential water heaters
of a capacity greater than 52 gallons, consult the local building jurisdiction for acceptable
bracing procedures.
READ AND FOLLOW THIS SAFETY INFORMATION
CAREFULLY.
SAVE THESE INSTRUCTIONS
Have the installer show you the location of the circuit breaker and how to shut it off if
necessary. Turn off the circuit breaker if the water heater has been subjected to overheating,
fire, flood, physical damage or if the ECO fails to shut off.
●Read this manual entirely before installing
or operating the water heater.
●Use this appliance only for its intended
purpose as described in this Use and Care
Manual.
●Be sure your appliance is properly installed
in accordance with local codes and the
provided installation instructions.
●Do not attempt to repair or replace any part
of your water heater unless it is specifically
recommended in this manual. All other
servicing should be referred to a qualified
technician.
SAFETY PRECAUTIONS

7
PREFACE
Let us rst offer two words of grateful appreciation.
Thank You! We sincerely appreciate your business.
Rheem also wishes to say thank you for "going
solar". Solar water heating systems help to reduce
our nation’s dependence on polluting fossil fuels,
minimize the greenhouse gas emissions associated
with conventional water heating and, very
importantly, lower your monthly utility costs.
Your Rheem solar water heating system has
been designed to meet exacting SRCC OG-300
certication requirements. The components found
in your system have been selected for their proven
reliability, longevity and performance in your specic
region of the country.
1) INTRODUCTION
Solar water heating systems are climate and site
specic appliances. Different types of solar systems
are installed around the world in accordance with
regional weather and water quality conditions. System
performance varies as a function of the household
hot water load, including daily showers, laundry and
kitchen uses, average ground water and ambient air
temperatures, the home’s roof pitch and orientation,
and, of course, the seasonal intensity of solar
radiation. These variables, some of which change
from home to home on the same neighborhood street,
will determine how much energy and money your
Rheem system will save on an annual basis.
Your Rheem solar system is known as a "forced
circulation" system because it utilizes a mechanical
pump to efciently circulate the Dow Chemical
Dowfrost HD propylene glycol heat transfer uid
(HTF) throughout the system. The HTF protects the
collector piping from freezing and inhibits scaling
deposits that can reduce performance in "open-loop"
systems utilizing potable water as the HTF. Proper
application and maintenance of the HTF can protect
your Rheem solar water heating system to minus 30°
Fahrenheit.
This manual is intended as a basic solar water heating
primer. Our goal is to familiarize you with the proper
installation, operation, and maintenance of your
Rheem solar system. This system is required to be
installed by properly licensed solar or plumbing
contractors in accordance with SRCC Standard OG-
300 and all applicable national, state and local codes,
ordinances and regulations governing solar water
heating installations, as well as good trade practices.
Failure to follow the procedures and practices
described in this manual can void the manufacturer's
warranty for specic component parts.
This manual covers installations utilizing two
Rheem solar collectors with a single solar storage
tank and also two tank systems that include a solar
storage tank and a conventional water heater. For
simplicity, the singular form will be used throughout
this manual when referring to all of these components
and system permutations. Frequent reference is made
throughout this manual to specic component parts.
The placement of each component can be seen in
system schematic gures 16 and 17. A description of
each component and its function is found in Section
10.
2) SYSTEM DESCRIPTION AND
OPERATIONAL PRINCIPLE
The key components in the Rheem solar water
heating system include the solar collector, solar
storage tank with integral heat exchanger, circulation
pump, differential thermostat, expansion tank,
pressure gauge, mixing valve and the non-toxic
propylene glycol heat transfer uid (HTF).
The Rheem solar collector is the heart of the system.
Simply stated, when the sun is shinning, heat energy
is absorbed by the solar collector’s all copper
absorber plate and tranferred to the HTF circulating
through the solar collector. The system pump
efciently circulates this heated uid through the
collector piping and integral tank heat exchanger. As
the HTF passes through the heat exchanger the heat
in the uid is transferred by conduction to the potable
water in your solar storage tank. As this process is
continuously repeated during the average sunny day
the temperature in your solar storage tank rises.
When the solar collector absorber plate is
approximately sixteen degrees hotter than the
temperature in the bottom of your solar storage tank,

8
the controller will turn the circulating pump on. When
the temperature difference has been reduced to eight
degrees, the controller automatically turns the pump
off.
Both single and double tank Rheem systems are
designed to provide three separate modes of system
operation. The system will, (1) accommodate 100%
solar operation, (2) serve as a preheater to your solar
storage tank or back-up water heater, or (3) bypass the
solar collector and run 100% on utility power. Section
Six provides instructions for setting the system for
automatic operation in each of these three modes.
The Dowfrost HD HTF protects your Rheem solar
system against freezing. Dowfrost HD can provide
reliable freeze protection at temperatures as low
as minus 30° Fahrenheit if properly applied and
maintained. Use of uninhibited propylene glycol,
plain water or a concentration of these two uids as
the HTF in this system is strictly prohibited.
Propylene glycol can degrade over time. The process
of degradation is accelerated in presence of oxygen
and/or heat. We strongly encourage you to establish
a preventative maintenance schedule with your
installation contractor. The HTF pH level must be
maintained between 8 and 10 in order to prevent
glycol oxidation and corrosion of the collector piping.
Rheem’s collector warranty specically excludes
freeze damage for any reason and absorber plate
damage resulting from the oxidation of the propylene
glycol HTF.
ferred to the HTF circulating through the solar
collector. The system pump efficiently circulates
this heated fluid through the collector piping and
integral tank heat exchanger. The heat exchang-
er consists of a 120’ length of copper tubing
wrapped around the solar storage tank. As the
HTF passes through the heat exchanger the heat
in the fluid is transferred by conduction to the
potable water in your solar storage tank. As this
process is continuously repeated during the aver-
age sunny day the temperature in your solar stor-
age tank rises.
The circulating pump in a solar water heating sys-
tem may be favorably compared with the human
heart. To continue the analogy, the differential
thermostat, or controller, is the brain in the sys-
tem. The controller uses 10K ohm thermistors, or
sensors, to constantly monitor the temperature
difference between the hottest and coldest
points in the system and to automatically turn
the circulating pump on and off throughout the
day.
When the solar collector absorber plate is
approximately twelve degrees hotter than the
temperature in the bottom of your solar storage
tank, the controller will turn the circulating pump
on. When the temperature difference has been
reduced to four degrees, the controller automat-
ically turns the pump off.
Both single and double tank Solaray systems are
designed to provide three separate modes of sys-
tem operation. The system will, (1) accommo-
date 100% solar operation, (2) serve as a pre-
heater to your solar storage tank or back-up
water heater, or (3) bypass the solar collector and
run 100% on utility power. Section Six provides
P. 2
fig. 1
fig.2
COLLECTOR ORIENTATION
STAGGERED MOUNT
COLLECTOR SPACING
ferred to the HTF circulating through the solar
collector. The system pump efficiently circulates
this heated fluid through the collector piping and
integral tank heat exchanger. The heat exchang-
er consists of a 120’ length of copper tubing
wrapped around the solar storage tank. As the
HTF passes through the heat exchanger the heat
in the fluid is transferred by conduction to the
potable water in your solar storage tank. As this
process is continuously repeated during the aver-
age sunny day the temperature in your solar stor-
age tank rises.
The circulating pump in a solar water heating sys-
tem may be favorably compared with the human
heart. To continue the analogy, the differential
thermostat, or controller, is the brain in the sys-
tem. The controller uses 10K ohm thermistors, or
sensors, to constantly monitor the temperature
difference between the hottest and coldest
points in the system and to automatically turn
the circulating pump on and off throughout the
day.
When the solar collector absorber plate is
approximately twelve degrees hotter than the
temperature in the bottom of your solar storage
tank, the controller will turn the circulating pump
on. When the temperature difference has been
reduced to four degrees, the controller automat-
ically turns the pump off.
Both single and double tank Solaray systems are
designed to provide three separate modes of sys-
tem operation. The system will, (1) accommo-
date 100% solar operation, (2) serve as a pre-
heater to your solar storage tank or back-up
water heater, or (3) bypass the solar collector and
run 100% on utility power. Section Six provides
P. 2
fig. 1
fig.2
COLLECTOR ORIENTATION
STAGGERED MOUNT
COLLECTOR SPACING

9
In order to completely protect the integrity of the
solar collector and piping, the system is designed to
be drained manually if subject to extended periods
of disuse or persistent hard freeze conditions below
minus 30° Fahrenheit. (See Sections 8.1 and 8.2
below).
3) INSTALLATION REQUIREMENTS -
GENERAL
3.1 The contractor shall obtain all required permits
and approvals.
3.2 The installation shall conform to all federal, state
and local regulations, codes, ordinances and standards
governing solar water heating system installations,
and the contractor shall adhere to sound building
safety and trade practices. Special consideration
must be given to building code requirements for
the penetration of structural members and re rated
assemblies.
3.3 The solar collector must be located in a
structurally sound area of the roof that will be
unshaded for the majority of the day all year round.
Adjacent buildings and trees should be checked for
possible winter shading. An instrument such as the
Pathnder can be used for solar site analysis.
3.4 Before the installation the contractor shall inspect
the condition of the roof and notify the homeowner
of any existing roof damage or necessary repairs.
3.5 The homeowner and contractor shall conrm the
location of all roof and ground mounted components
in advance of the installation.
4) INSTALLATION REQUIREMENTS -
SPECIFIC
4.1 Collector Orientation
The performance of solar water heating systems
instructions for setting the system for automatic
operation in each of these three modes.
The Dowfrost HD HTF protects your SolaRay solar
system against freezing. Dowfrost HD can pro-
vide reliable freeze protection at temperatures as
low as minus 60°Fahrenheit if properly applied
and maintained. Use of uninhibited propy-
lene glycol, plain water or a concentration
of these two fluids as the HTF in this system
is strictly prohibited.
Propylene glycol can degrade over time. The
process of degradation is accelerated in presence
of oxygen and/or heat. We strongly encourage
you to establish a preventative maintenance
schedule with your installation contractor. The
HTF pH level must be maintained between 8 and
10 in order to prevent glycol oxidation and cor-
rosion of the collector piping. SunEarth’s col-
lector warranty specifically excludes freeze
damage for any reason and absorber plate
damage resulting from the oxidation of the
propylene glycol HTF.
In order to completely protect the integrity of the
solar collector and piping, the system is designed
to be drained manually if subject to extended
periods of disuse or persistent hard freeze condi-
tions below minus 60°Fahrenheit. (See Sections
8.1 and 8.2 below).
3) INSTALLATION REQUIREMENTS - GENERAL
3.1 The contractor shall obtain all required per-
mits and approvals.
3.2 The installation shall conform to all federal,
state and local regulations, codes, ordi-
nances and standards governing solar
water heating system installations, and the
contractor shall adhere to sound building
safety and trade practices. Special consid-
eration must be given to building code
requirements for the penetration of struc-
tural members and fire rated assemblies.
3.3 The solar collector must be located in a
structurally sound area of the roof that will
P. 3
fig.3
LATITUDE 25°N 30°N 35°N 40°N 45°N 50°N
COLL. TILT 35° 40° 45° 50° 55° 60°
A B A B AB A B AB AB
FLAT 29 96 33 113 37 145 41 145 44 145 48 145
5° 1/12 25 83 29 93 33 113 37 132 41 133 44 141
9° 2/12 22 74 26 82 30 77 34 110 38 115 41 118
14° 3/12 17 66 22 72 26 82 30 92 34 95 38 98
18° 4/12 14 61 18 66 22 74 26 82 30 85 34 87
ROOF 23° 5/12 10 58 14 60 18 66 22 72 26 74 30 77
PITCH 27° 6/12 7 58 11 58 15 61 19 66 23 68 27 70
30° 7/12 4 58 8 58 13 58 17 62 21 65 25 66
34° 8/12 0 58 5 58 9 58 13 58 17 60 22 62
37° 9/12 0 58 3 58 7 58 11 58 15 58 19 58
40° 10/12 0 58 0 58 4 58 8 58 13 58 17 58
43° 11/12 0 58 0 58 2 58 6 58 10 58 14 58
45° 12/12 0 58 0 58 0 58 4 58 8 58 13 58
DIMENSIONS A AND B ARE DESIGNATED IN INCHES
TABLE 1
SIDE PITCH MOUNTING
instructions for setting the system for automatic
operation in each of these three modes.
The Dowfrost HD HTF protects your SolaRay solar
system against freezing. Dowfrost HD can pro-
vide reliable freeze protection at temperatures as
low as minus 60°Fahrenheit if properly applied
and maintained. Use of uninhibited propy-
lene glycol, plain water or a concentration
of these two fluids as the HTF in this system
is strictly prohibited.
Propylene glycol can degrade over time. The
process of degradation is accelerated in presence
of oxygen and/or heat. We strongly encourage
you to establish a preventative maintenance
schedule with your installation contractor. The
HTF pH level must be maintained between 8 and
10 in order to prevent glycol oxidation and cor-
rosion of the collector piping. SunEarth’s col-
lector warranty specifically excludes freeze
damage for any reason and absorber plate
damage resulting from the oxidation of the
propylene glycol HTF.
In order to completely protect the integrity of the
solar collector and piping, the system is designed
to be drained manually if subject to extended
periods of disuse or persistent hard freeze condi-
tions below minus 60°Fahrenheit. (See Sections
8.1 and 8.2 below).
3) INSTALLATION REQUIREMENTS - GENERAL
3.1 The contractor shall obtain all required per-
mits and approvals.
3.2 The installation shall conform to all federal,
state and local regulations, codes, ordi-
nances and standards governing solar
water heating system installations, and the
contractor shall adhere to sound building
safety and trade practices. Special consid-
eration must be given to building code
requirements for the penetration of struc-
tural members and fire rated assemblies.
3.3 The solar collector must be located in a
structurally sound area of the roof that will
P. 3
fig.3
LATITUDE 25°N 30°N 35°N 40°N 45°N 50°N
COLL. TILT 35° 40° 45° 50° 55° 60°
A B A B AB A B AB AB
FLAT 29 96 33 113 37 145 41 145 44 145 48 145
5° 1/12 25 83 29 93 33 113 37 132 41 133 44 141
9° 2/12 22 74 26 82 30 77 34 110 38 115 41 118
14° 3/12 17 66 22 72 26 82 30 92 34 95 38 98
18° 4/12 14 61 18 66 22 74 26 82 30 85 34 87
ROOF 23° 5/12 10 58 14 60 18 66 22 72 26 74 30 77
PITCH 27° 6/12 7 58 11 58 15 61 19 66 23 68 27 70
30° 7/12 4 58 8 58 13 58 17 62 21 65 25 66
34° 8/12 0 58 5 58 9 58 13 58 17 60 22 62
37° 9/12 0 58 3 58 7 58 11 58 15 58 19 58
40° 10/12 0 58 0 58 4 58 8 58 13 58 17 58
43° 11/12 0 58 0 58 2 58 6 58 10 58 14 58
45° 12/12 0 58 0 58 0 58 4 58 8 58 13 58
DIMENSIONS A AND B ARE DESIGNATED IN INCHES
TABLE 1
SIDE PITCH MOUNTING

10
in the Northern Hemisphere is optimized when the
collector is mounted facing True South. Performance,
however, suffers very little when the collector is
oriented no more than 45° East or West of True South.
The collector should be unshaded by any permanent
obstacle between 9:00 a.m. and 3:00 p.m. on any day
of the year.
be unshaded for the majority of the day all
year round. Adjacent buildings and trees
should be checked for possible winter
shading. An instrument such as the Solar
Pathfinder can be used for solar site analy-
sis. (Solar Pathfinder can be reached at
605-528-6473).
3.4 Before the installation the contractor shall
inspect the condition of the roof and noti-
fy the homeowner of any existing roof
damage or necessary repairs.
3.5 The homeowner and contractor shall con-
firm the location of all roof and ground
mounted components in advance of the
installation.
4) INSTALLATION REQUIREMENTS - SPECIFIC
4.1 Collector Orientation
The performance of solar water heating systems
in the Northern Hemisphere is optimized when
the collector is mounted facing True South.
Performance, however, suffers very little when
the collector is oriented no more than 45° East or
West of True South. The collector should be
unshaded by any permanent obstacle between
9:00 a.m. and 3:00 p.m. on any day of the year.
4.2 Collector Tilt
Optimal annual efficiency is achieved by tilting
the solar collector at an angle that equals your
latitude plus an additional 10°. This tilt angle
favors the lower winter sun when collector per-
formance is at it’s lowest and minimizes over-
heating during the hottest summer months.
The solar collectors in a two collector staggered
mount installation must be spaced far enough
apart to prevent winter shading. Figure 2 and
P.4
fig.6
fig.4
fig.5
COMPOSITION SHINGLE MOUNTING
SHINGLE ROOF MOUNTING
REVERSE PITCH MOUNTING