Use & Care Manual
With Installation Instructions for the Installer
Pumped Solar Water
Heating Systems
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.
This Solar Water Heating system is for the models listed below:
RS80-48BP
RS120-64BP
!
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)
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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.
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.
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.
The components of the system include a water storage
tank, solar collector panels, expansion tank, pump
valves and fittings.
This manual provides the manufacturers recommended In locations which are subject to temperatures below
procedures for Rheem solar water-heating systems.
The procedures are essential for correct installation,
troubleshooting and maintenance.
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.
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 circulation of the heat transfer fluid is
accomplished by a pump and sensors. These solar
water heaters are referred to as closed loop systems.
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.
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.
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 your system is one of the most efficient
available, there are two simple steps you can take to
increase your water-heating cost savings.
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.
3
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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.
4
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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.
Time/Temperature Relationship in Scalds
ꢀ
& # 0 ) ' 4
Temperature
Time To Produce a Serious Burn
120°F
More than 5 minutes
1½ to 2 minutes
125°F
130°F
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1½ seconds
About 1 second
135°F
140°F
145°F
150°F
155°F
*16
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,
$740
or elderly persons may require a 120°F or lower thermostat
setting to prevent contact with “HOT” water.
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ECWUGꢀUGXGTGꢀDWTPUꢀKPUVCPVN[ꢀQT
FGCVJꢀHTQOꢀUECNFUꢄ
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.
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CVꢀJKIJGUVꢀTKUMꢀQHꢀDGKPIꢀUECNFGFꢄ
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.
5GGꢀKPUVTWEVKQPꢀOCPWCNꢀDGHQTG
UGVVKPIꢀVGORGTCVWTGꢀCVꢀYCVGT
JGCVGTꢄ
(GGNꢀYCVGTꢀDGHQTGꢀDCVJKPIꢀQT
UJQYGTKPIꢄ
This thermostat controls the
water heater’s heating ele-
6GORGTCVWTGꢀNKOKVKPIꢀXCNXGUꢀCTG
CXCKNCDNGꢅꢀUGGꢀOCPWCNꢄ
R
T
E
E
S
S
E
E
T
R
Reset button
ment only. (A separate ther-
mostat should be utilized in
monitoring the temperature
from the collector).
Thermostat
dial pointer
!
DANGER: Burns from Hot Water and
Steam - Use extreme care when opening relief
valves, charging closed loop, and filling storage
tank.
150°F
90°F
(32°C)
(66°C)
(52°C)
125°F
To comply with safety reg-
ulations the thermostat is
factory set at 120° F or less
where local codes require.
TURN OFF
POWER
BEFORE
SERV ICING
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.
Thermostat
protective
cover
!
DANGER: Hotter water increases the potential for Hot
Water SCALDS.
5
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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.
SAFETY PRECAUTIONS
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.
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.
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.
READ AND FOLLOW THIS SAFETY INFORMATION
CAREFULLY.
SAVE THESE INSTRUCTIONS
6
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PREFACE
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 specific component parts.
Let us first 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.
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 specific component parts.
The placement of each component can be seen in
system schematic figures 16 and 17. A description of
each component and its function is found in Section
10.
Your Rheem solar water heating system has
been designed to meet exacting SRCC OG-300
certification requirements. The components found
in your system have been selected for their proven
reliability, longevity and performance in your specific
region of the country.
1) INTRODUCTION
Solar water heating systems are climate and site
specific 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.
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 fluid (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
efficiently circulates this heated fluid through the
collector piping and integral tank heat exchanger. 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 average sunny day
the temperature in your solar storage tank rises.
Your Rheem solar system is known as a "forced
circulation" system because it utilizes a mechanical
pump to efficiently circulate the Dow Chemical
Dowfrost HD propylene glycol heat transfer fluid
(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
When the solar collector absorber plate is
approximately sixteen degrees hotter than the
temperature in the bottom of your solar storage tank,
7
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COLLECTOR ORIENTATION
fig. 1
the controller will turn the circulating pump on. When Propylene glycol can degrade over time. The process
the temperature difference has been reduced to eight
degrees, the controller automatically turns the pump
off.
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 specifically excludes
freeze damage for any reason and absorber plate
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 damage resulting from the oxidation of the propylene
solar collector and run 100% on utility power. Section glycol HTF.
Six provides instructions for setting the system for
automatic operation in each of these three modes.
fig.2
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 fluids as
the HTF in this system is strictly prohibited.
STAGGERED MOUNT
COLLECTOR SPACING
8
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TABLE 1
LATITUDE
COLL. TILT
25°N
35°
30°N
40°
35°N
45°
40°N
50°
45°N
55°
50°N
60°
A
29
25
22
17
14
10
7
4
0
0
0
B
A
33
29
26
22
18
14
11
8
5
3
0
0
B
A
37
33
30
26
22
18
15
13
9
B
A
B
A
44
41
38
34
30
26
23
21
17
15
13
10
8
B
A
48
44
41
38
34
30
27
25
22
19
17
14
13
B
FLAT
96
83
74
66
61
58
58
58
58
58
58
58
58
113
93
82
72
66
60
58
58
58
58
58
58
58
145
113
77
82
74
66
61
58
58
58
58
58
58
41
37
34
30
26
22
19
17
13
11
8
145
132
110
92
82
72
66
62
58
58
145
133
115
95
85
74
68
65
60
58
145
141
118
98
87
77
70
66
62
58
5°
9°
1/12
2/12
3/12
4/12
5/12
6/12
7/12
8/12
9/12
10/12
11/12
12/12
14°
18°
23°
27°
30°
34°
37°
40°
43°
45°
ROOF
PITCH
7
4
2
0
58
58
58
58
58
58
58
58
58
0
0
6
4
0
DIMENSIONS A AND B ARE DESIGNATED IN INCHES
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).
3.5 The homeowner and contractor shall confirm the
location of all roof and ground mounted components
in advance of the installation.
4) INSTALLATION REQUIREMENTS -
SPECIFIC
3) INSTALLATION REQUIREMENTS -
GENERAL
4.1 Collector Orientation
The performance of solar water heating systems
3.1 The contractor shall obtain all required permits
and approvals.
fig.3
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 fire 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
Pathfinder 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.
SIDE PITCH MOUNTING
9
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fig.4
REVERSE PITCH MOUNTING
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.
10
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fig.5
COMPOSITION SHINGLE MOUNTING
4.2 Collector Tilt
horizontal orientation on the roof (See Figure 1).
Although the collector is protected from freeze
conditions by the glycol HTF and does not normally
need to be drained, it is still important to slope the
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 collectors just slightly to allow for complete drainage
winter sun when collector performance is at it’s lowest if necessary. The recommended slope is 1/4" per foot
and minimizes overheating during the hottest summer of horizontal run.
months.
To ensure proper water drainage from the glazing
the collectors must maintain a minimum angle from
horizontal of at least 10°. Never mount the collector
The solar collectors in a two collector staggered
mount installation must be spaced far enough apart to
prevent winter shading. Figure 2 and Table 1 show the directly or parallel to a flat roof surface. Use "Solar
correct spacing between collectors to prevent shading
on December 21, when the sun is at its lowest angle.
Strut" tilt mount kits to rack the collectors to the
proper angle.
4.3 Basic Mounting Procedures
The collector should be mounted as close to the
storage tank as possible to minimize heat loss in the
piping runs. If the home has attic access, mounting the
collectors near the roof peak provides for additional
11
The Rheem solar collector in your Rheem solar
system can be mounted in either a vertical or
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Installing the water heater.
fig.6
SHINGLE ROOF MOUNTING
attic workspace.
the collectors and for proper ventilation of the roofing
material. There should be at least 3" of clearance
between the roof surface and the bottom of the solar
collectors.
The solar collector should be mounted on the roof in
accordance with these general principles:
4.3.1 The most important structural consideration is
to securely anchor the solar collector and the Rheem
mounting hardware to the structural members of the
roof with stainless steel hanger or lag bolts. The solar
4.3.3 In selecting mounting hardware and fasteners
it is extremely important to avoid galvanic corrosion
resulting from the direct contact of incompatible
metals. Use of Rheem anodized aluminum Rheem
collector must be attached to the mounting hardware as mounting hardware and stainless steel lag or
detailed in Figures 5–12. (Note: The drawings in this
hanger bolts, lock washers and round washers is
manual detail mounting hardware for the Rheem series recommended. In climates subject to severe winters or
collector.)
high humidity use of galvanized fasteners is prohibited.
4.3.2 The collector must be raised from the roof
4.3.4 Preserving the integrity of the roof membrane
surface to allow for rainwater and debris to pass under
is the most important roofing consideration. Ensure
12
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fig.7
TILE ROOF MOUNTING
that all roof penetrations required to plumb and mount
the solar collector are properly flashed and sealed in
accordance with standard roofing practices.
must be well insulated with a high quality flexible
closed cell insulation to minimize heat loss. The wall
thickness of the pipe insulation should not be less than
3/4". A 1" wall thickness is required in all areas prone
to annual hard freeze conditions. When it comes to pipe
insulation the rule is simple: thicker is better. Use 3/4"
4.3.5 If the region is subject to hurricane conditions,
additional steps may be required to secure the collector Armaflex (or similar) flexible elastomeric closed cell
and mounting hardware to the structural members. In
certain areas of the country, local building codes may
thermal insulation.
require collector wind load testing or prescribe specific To the extent possible, slide the insulation material
mounting procedures. Consult your local building
department.
over the pipe without cutting or taping. All butt joints
must be sealed with contact adhesive. The use of
rigid polyethylene pipe insulation is prohibited. The
temperatures generated by your collector in the summer
months or under stagnation conditions can melt this
type of material.
4.4 Collector Loop Pipe Insulation
The collector loop cold supply and hot return lines
13
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Installing the water heater.
fig.8
TILE ROOF MOUNTING
Any above ground exterior pipe insulation is subject
to UV degradation and must be wrapped with foil tape
or painted with two coats of high quality water-based
acrylic resin coating as supplied by the insulation
manufacturer. Use 3/4" Armaflex (or similar) flexible
elastomeric closed cell thermal insulation.
Piping in new solar installations can be covered with
dirt, grease, solder flux or other impurities that over
time affect the quality of the glycol HTF. A thorough
cleaning is required before charging the system with
glycol. Carefully review the cleaning procedures in
"Charging The System" outlined below.
All vertical piping between the storage tank and
the collector shall be supported at each story or at
maximum intervals of ten feet (10'). Copper plumbers
tape or tube strap is required. The pipe insulation
may not be compressed or crimped by the strapping
material.
The installation of all horizontal and vertical piping
may not reduce the performance or rating of any
structural member or fire rated assembly. Adhere to all
applicable local codes and ordinances.
4.5 Collector Plumbing
Rheem requires the use of all copper and brass fittings
in the collector loop plumbing. Couplings rather than
unions should be used to join the collectors to avoid
leaks and fluid loss. Use only lead-free solder. Use
of 50/50 lead solder is expressly prohibited. Use of
galvanized steel, CPVC, PVC, or any other type of
plastic pipe is prohibited.
14
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fig.9
FLUSH MOUNTING
4.6 Collector Sensor Placement
Figure 13 for collector sensor installation detail.
4.7 Low Voltage Wiring
The collector sensor must be located on the hot
water return line as close to the collector as possible.
Sensors are typically accurate to +/- 1/2°F if properly
installed and weatherized. To maximize sensor
accuracy, attach the flanged portion of the sensor to
The low voltage wiring used to connect the sensors
to the controller should be a minimum18 AWG.
The wiring should be bare or tinned copper, two
the Rheem collector header pipe with a stainless steel conductor, PVC insulated, with a PVC UV rated gray
hose clamp. Wire nuts used to connect the sensor and
low voltage wiring shall be all plastic, sealed with
jacket suitable for exterior use. Use Eastman Wire &
Cable No. 5704, Belden Wire and Cable No. 8461 or
silicone and thoroughly wrapped in electrician’s tape. equal.
The sensor "bundle" must be placed under the
rubber pipe insulation covering the collector header.
Thoroughly wrap and weatherize the insulation with
electrician’s tape or insulation tape as provided by
the manufacturer (Rubatex Insul-Tape or equal). See
4.8 Installing the Solar Storage Tank and Expansion
Tank
In plumbing the solar storage tank and expansion tank
make sure that all the components are accessible and
15
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Installing the water heater.
fig.10
FLUSH MOUNTING
easy to reach. Provide for clear access to the storage
heater. If not detected in a timely manner even a small
tank, pump, expansion tank, mixing valve, time clock drip or leak may cause serious damage to the tank’s
(optional, not provided) and other key components. If electrical components or, in extreme cases, may cause
a component in the potable water side of the system
may require future service or maintenance make the
the tank to leak from the outside in.
Tank plumbing is required to provide for the isolation
connections with brass unions. Use only brass nipples of the solar storage tank from the city cold water
and unions and copper and brass fittings in plumbing
the solar storage tank and expansion tank. The use
of galvanized fittings or nipples, di-electric unions,
CPVC, PVC or other plastic pipe is prohibited.
supply line by means of an isolating ball valve (No.
23).
Line thermometers shall be installed in the collector
supply and return lines to allow for a simple
diagnostic check of proper system operation. On
a sunny day the hot water return line should be
approximately 5 – 12° warmer than the water in
the collector supply line. Compare the temperature
readings in the two line thermometers (No. 3).
Hard copper connections to the city cold water
supply line and the home hot water feed lines
are recommended. The gaskets in standard water
heater flex hose connectors can become brittle and
compressed over time and begin leaking on the water
16
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fig.11
TILT MOUNT
In a single tank system install a third thermometer
on the solar storage tank or after the mixing valve on
(No. 3) directly after the mixing valve above the solar the back-up water heater.
storage tank. In a two tank system you may install the
third thermometer either directly above the hot outlet
The circulation pump shall be the Grundfos model
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Installing the water heater.
fig.12
STAND OFF TILT MOUNT
UPS15-5BFC/LC, 115 volt. The pump shall be
prewired with a 6’ line cord so that it can be plugged
directly into the 115 volt receptacle on the side of
the differential control. Two way ball valves must
be installed on either side of the circulating pump
(Nos.12 and 14) so that the pump can be isolated
from the collector loop. Repairs or routine system
maintenance can be completed without introducing air
into the system or draining the HTF.
component in all OG-300 certified systems and should
be plumbed in line with brass union connections for
ease of future repair or replacment (No. 32). The
specified mixing valve shall be the Heatguard model
HGBASE or equal and shall have an operating range
between 95°F and 140°F. The mixing valve shall be
set to 120°F.
The temperatures generated by your Rheem system
will vary throughout the year. In the Northern
Hemisphere the water temperature will be hottest
in the spring and summer months while cooler
temperatures are to be expect from November through
The expansion tank shall have a minimum 150 PSIG
working pressure and have a total volume of not less
than 4.4 gallons. The standard factory charge should
be 40 PSIG. The expansion tank shall be Rheem/Ruud March. On sunny days system temperatures may
Therm-X-Guard Model RRT- 12 or equal (No. 8).
range between 110ºF to 180ºF depending upon the
season and hot water demand. The mixing valve
A high quality thermostatic mixing valve is a required described above blends the hot and cold water
18
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fig.13
COLLECTOR
SENSOR
supplies to deliver hot water to your fixtures at a safe,
controlled temperature.
Thoroughly weatherize the wire connections in
accordance with the roof sensor detail above. Replace
the fiberglass insulation batting and close the access
cover.
!
WARNING: SCALDING CAN OCCUR
WITHIN FIVE SECONDS WHEN WATER
TEMPERATURES APPROACH 140ºF. THE
MIXING VALVE SHOULD BE ADJUSTED BY
YOUR CONTRACTOR TO PROVIDE WATER
TO YOUR FIXTURES AT NO MORE THAN
120ºF.
A properly licensed contractor must make the 230
volt electrical connection to the water heater or solar
storage tank and the electronic time switch (Optional
No. 33). If your solar contractor is not allowed by
law to make these connections consult a licensed
electrician.
The 3/4" cold water supply line to the solar storage
tank must be insulated with minimum 7/8" X 1/2"
Never activate the circuit breaker controlling the
pipe insulation to a minimum distance of 5' behind the electrical heating element until the solar storage tank
storage tank, or to the wall if closer than 5'.
4.9 Tank Sensor Placement
is completely filled with water. This will prevent “dry
firing” of the heating element. The electrical heating
element will be destroyed almost instantaneously if
not completely submerged in water when activated.
Make sure the water heater circuit breaker is off until
the solar storage tank is completely filled.
Figure 18 details the proper placement of the solar
storage tank sensor. Make sure the sensor is secured
to the threaded stud on the storage tank with a 10-24
stainless steel nut.
19
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fig.14
COLLECTOR PLUMBING - VERTICAL MOUNT
We recommend the use of a 115 volt differential
control with a factory installed six foot line cord. The
installation requires one 115 volt outlet to be installed
near the solar storage tank. Plug the control into the
outlet. The circulation pump line cord is plugged into
the receptacle on the side of the controller. A 230 volt
control and circulation pump may be substituted, but
troubleshooting the components in the future becomes
more difficult.
4.11 Charging the System
!
WARNING: Under no circumstances can any
fluid other than Dowfrost HD be used, alternate
fluids could be hazardous to your health.
Once the components are plumbed you are ready to
fill the solar storage tank with water and to charge
the collector loop with a mixture of heat transfer fluid
(HTF) and distilled or deionized water. The use of
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fig.15
COLLECTOR PLUMBING - HORIZONTAL MOUNT
regular tap water as a mixing agent is prohibited.
(No. 11) and let the water run out until it is free of
impurities or debris that might have entered the piping
as the components were plumbed. Run the water
long enough to eliminate any air bubbles that may be
trapped in the system.
Proceed as follows:
4.11.1 Begin by filling the solar tank with water. Do
this by opening the cold water isolation ball valve
to the solar tank (No. 23). When the tank is filled,
inspect all threaded fittings and solder joints for leaks.
Close the lower purge/drain valve. The collector
loop now has been subjected to city pressure and the
pressure gauge should read somewhere in the range
of 50 - 75 PSI in most cases (No. 7). Make a final
inspection of the collector plumbing connections
to ensure that there are no leaks anywhere in the
collector loop piping.
4.11.2 Fill and pressurize the solar collector loop
with water. Begin by connecting a washing machine
hose to the upper charge valve (No. 9) and fill the
collector loop with water. The isolation ball valve
(No. 10) remains closed at this point. While the hose
is still connected to the upper charge valve and the
water is running, open the lower purge/drain valve
4.11.3 After you have determined the integrity of the
entire piping system turn on the circulating pump. Do
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fig.16
SINGLE TANK SYSTEM SCHEMATIC
this by setting the manual switch within the controller component. A flow meter allows you to monitor and
to the “on” position. Run the pump for a full five
minutes and carefully check to ensure there is proper
fluid flow and that all the air has been purged from
the solar collector glycol loop. An inexpensive flow
adjust the flow rate through the piping and also to
visually inspect the HTF fluid quality.
Set the controller to the "off" position and proceed to
meter such as manufactured by Blue White Industries the next step.
or Letro is recommended as an optional system
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fig.17
DOUBLE TANK SYSTEM SCHEMATIC
4.11.4 Mix the Dowfrost HD propylene glycol and
distilled water mixture in accordance with Table 4
and Table 5 in a large clean bucket. You will need a
second empty bucket as well. The charging process
also will require a low flow diaphragm pump (Flojet
or equal) to fill and pressurize the collector loop.
Connect the discharge side of the pressure pump
to the upper charge faucet (No. 9) Place the pump
suction side hose in the glycol solution. Close the
isolation ball valve (No. 10) and connect a second
hose to the lower charge faucet (No. 11). Place the
other end of the hose in the empty bucket.
23
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fig.18
TANK SENSOR
Open the upper charge faucet and allow the pressure
from the expansion tank to push the water in the
glycol loop back to prime the pressure pump. When
the hose in the bucket containing the glycol mixture
stops bubbling you may begin charging the collector
loop with glycol.
operational on a good sunny day. Contact your solar
contractor if the charged collector loop pressure
exceeds this threshold.
Your Rheem solar water heating system must be
charged and the fluid quality maintained by an
experienced contractor. If the system is drained during
the winter, or you notice a significant drop in collector
With both charge faucets now open, run the Flojet
pressure pump until the pinkish glycol mixture begins loop pressure, contact your installation contractor
flowing into the empty bucket. Quickly switch the
hose from the empty/return bucket to the bucket
containing the glycol mixture. Continue to circulate
the fluid using the pressure pump until the bubbling
has stopped and the air has been purged.
immediately for service. The glycol HTF provides
the freeze protection for your system and must be
properly maintained. An experienced contractor
should periodically check the HTF fluid quality.
4.11.6 Dowfrost HD HTF
4.11.5 After charging the collector loop, shut the
lower charge faucet and let the pressure pump
drive up the loop pressure to the appropriate level
To ensure maximum effectiveness for corrosion
protection, the glycol inhibitor package is designed
(Generally in the range of 25 PSI). To more accurately for a minimum 25-30 percent concentration of
calculate the proper pressure measure the height of the glycol in water. Table 4 shows the concentrations of
solar collector above the solar storage tank and divide Dowfrost HD required to provide freeze and burst
this number by 2.31. Then add 20 PSI to this number. protection at various temperatures. Use the mixture
As a word of caution, the pressure in the glycol
loop should not exceed 45 PSI when the system is
most appropriate for your climate. Do not use a
higher glycol to water concentration than necessary,
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fig.19
ELECTRICAL COMPONENTS
as this will adversely impact the relative heat transfer
efficiency of the solution.
control, neither Rheem nor Dow Chemical guarantees
that freeze damage may not occur at temperatures
other than shown.
Generally, for an extended margin of protection, you
should select a temperature that is at least 5°F lower
than the expected lowest ambient temperature. These
figures are examples only and should not be regarded
as specifications. As conditions are not within our
Water used to dilute the HTF must meet certain
minimum standards for purity. Impurities in the
dilution water can increase metal corrosion, reduce the
effectiveness of corrosion inhibitors, increase inhibitor
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depletion rate, and cause the formation of scale and
other deposits on the heat exchanger's internal heat
transfer surfaces.
6) THREE MODES OF SYSTEM OPERATION
Both single and double tank Rheem systems are
designed to accommodate three separate modes of
operation. Your solar water heating system can, (1)
provide 100% solar operation during good weather, or
Distilled or deionized water is required.
The HTF pH level must be maintained between 8 and (2) serve as a preheater to your electric water heater
10 to minimize corrosion and glycol oxidation in the
piping system.
adding solar energy when and as available, or (3)
completely bypass the solar collector loop and solar
storage tank and run 100% on utility power during
inclement weather.
5) SYSTEM START-UP PROCEDURES
Throughout the installation procedures outlined
in Section 4 above, emphasis has been placed on
the correct procedures for plumbing and wiring
the components, checking for plumbing leaks,
Single Tank Operating Instructions:
6.1 100% Solar Operation:
pressurizing the collector glycol loop, and eliminating Turn off the circuit breaker to your solar storage
any trapped air that can impact fluid quality and pump tank. If a water heater time switch has been installed,
performance. Having completed these tasks it is time
to start up your Rheem solar water heating system.
set the switch to the "off" position. If you have a
mechanical timer remove the trippers from the face of
the switch.
When the glycol loop has been fully charged and
the pressure is around 25 psi (check the pressure
gauge, No. 7), set the differential controller to
the "Automatic" setting. This will activate your
6.2 Solar Preheat
Leave the circuit breaker to your solar storage
tank on and set the tank thermostat to the lowest
circulating pump. The controller allows you to set the acceptable temperature setting. The electric resistance
"on" differential. Turn the red rotary switch inside the heating elements will come on only when the tank
control housing to 12.
temperature falls below the thermostatic set point.
If the solar heated water entering the tank is warmer
Adjust the valve settings in accordance with Section 6 than the thermostatic set point, the electric heating
below.
elements will not come on. If you have a water heater
timer, you may preset the timer to turn the heating
element on and off at specified times throughout the
day if desired.
Table 4
6.3 100% Utility Power
Percent (volume) Glycol Concentration Required
Temperature F
20
For Freeze Protection
For Burst Protection
Leave the circuit breaker to your solar storage tank on
and close the isolation ball valves in the collector loop
(Nos. 5 and 10). In this mode of operation you must
turn off the circulation pump. To turn the pump off
18%
29
12%
20
10
0
36
24
-10
-20
-30
-40
-50
-60
42
28
Table 5
46
30
Total Collector Loop Fluid Capacity In Gallons*
50
33
54
35
1 Collector System
2 Collector System
4 Gallon
57
35
5 Gallons
60
35
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open the controller and change the operational setting
7) ISOLATING THE MAJOR COMPONENTS
from automatic to off. Failure to turn off the pump can AND SYSTEM SHUT DOWN PROCEDURES
quickly damage the pump motor, shaft, bearings or
impeller.
Your Rheem solar water heating system is designed
so that the key components can be easily isolated
for emergency repairs or routine maintenance. By
shutting a single valve you can isolate the entire
system from the pressurized cold water supply line
(No. 23). In the case of a storage tank or fitting leak
Two Tank System Instructions:
6.4 100% Solar Operation
Follow the instructions for single tank systems above. immediately shut this valve and call your installation
You also must change the position of the three way
ball valves above both the solar storage tank and the
back-up water heater (Nos. 24 and 26). Valve handle
No. 24 must be in the horizontal position. Valve
handle No. 26 must be in the vertical position. See
Figure 19a, 100% Solar Operation.
contractor for service.
The collector loop can be isolated from the solar
storage tank by closing isolation ball valves Nos.
5 and 10. If the pressure in this loop drops or you
find a glycol leak shut these valves and contact your
installation contractor. Turn the circulating pump off
by setting the controller to the “off” position.
6.5 Solar Preheat
Follow the instructions for the single tank system for
setting the thermostat and the heating elements for
automatic operation. The three way valve above the
solar storage tank (No. 24) must be in the vertical
In two tank systems the solar storage tank can be
isolated from the back-up water heater.
Set the valve handle on the three way ball valve (No.
position. Each valve handle (Nos. 24, 25 and 26) must 24) to the horizontal position and close the isolation
be placed in the horizontal position. See Figure 19b,
Solar Preheat.
ball valve (No. 25). By closing these two valves the
tank can be serviced or replaced. The operation of the
back-up water heater will not be effected.
6.6 100% Utility Power
The back-up water heater in two tank systems also can
be isolated from the rest of the system. Close the cold
water supply line ball valve (No. 23) and set the three
way valve handle above the conventional water heater
(No. 26) to the vertical position. Set the two way ball
valve handle (No. 30) directly above the heater to the
horizontal position.
Follow the instructions for the single tank system
above. All three ball valves above the heaters (Nos.
24, 25 and 26) must have the valve handles placed in
the horizontal position. See Figures 19c 100% Utility
Power and 19d.
fig.19a
100% SOLAR
OPERATION
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8) SUMMER VACATION
RECOMMENDATIONS AND PROCEDURES
ANY BODY OF WATER. BE CAREFUL. THE
HTF MAY BE EXTREMELY HOT!
Solar water heating systems can build up very high
t e m p e r a t u r e s when there is no daily draw on
the system. If a short summer vacation is planned
the best way to dissi-pate heat in the system is to set
the controller to the "on" position. The circulating
pump will run twenty-four hours a day and cool
off the water in the solar storage tank at night. The
8.3 If the system is installed with an optional time
clock make sure the clock is not preset to go "ON"
during your absence. If you have a mechanical time
switch, remove the "on" tripper from the clock face
(No. 33).
When you return home contact your service contractor
collector radiates heat back to the atmosphere at night, to recharge the system with HTF. After the system has
preventing the system from stagnating at very high
temperatures. This will not harm the pump or add
substantially to your monthly utility bill. Remember
been recharged, set the controller to the “automatic”
position. Reset the time switch.
to set the control to the "Automatic" setting upon your 9) MAINTENANCE AND TROUBLESHOOTING
return!
The following simple procedures are intended to
During extended summer vacations (4 weeks or more) optimize the performance of your Rheem solar water
it is advisable to either cover the solar collectors with
an opaque material or to manually drain the collector
loop HTF. Rheem recommends that you cover the
collectors if practical.
heating system and also to extend the life of the
primary components.
9.1 Fluid Quality: It is extremely important to monitor
the quality of the Dowfrost HD HTF on a periodic
basis. The chemical composition of the heat transfer
fluid may change over time. System pH must be
maintained between 8 and 10 to avoid damage to the
collector loop and absorber plate piping.
If you choose to drain the HTF in the collector loop
follow these steps:
8.1 Turn the controller to the “off” position (No. 18).
8.2 Connect one end of a garden hose to the purge/
drain valve (No 11) and place the other end in a five
gallon bucket. Open the valve and gravity will drain
the heat transfer fluid into the bucket. A licensed
recycler, reclaimer or incinerator must dispose of the
Dowfrost HD.
9.2 The second most important component in your
system, at least from a longevity standpoint, is often
ignored and never seen. We are referring to the
sacrificial "anode rod" installed in your solar storage
tank (No. 20). Typically constructed from magnesium,
anode rods are installed in "glass lined" water heaters
and storage tanks to inhibit corrosion.
DO NOT DUMP DOWFROST HD INTO A
STORM SEWER, ON THE GROUND OR INTO
As the name implies, the "sacrificial" anode rod is
fig.19b
SOLAR
PREHEAT
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fig.19c
100% UTILITY
POWER
consumed so that the tank lining is not. At a certain
point in the process, the anode rod is no longer
completely effective and the corrosive processes
maintain a high level of thermal performance.
9.5 Check the exterior pipe insulation annually and
begin to eat away at the tank's glass lining. In time the patch or repair any exposed surfaces or degraded
solar storage tank, like any other gas or electric water
heater, will begin to leak. The process is not reversible
and the tank must be replaced.
areas. Repaint as necessary.
9.6 In the unusual instance of collector glass
System temperatures and water quality affect the rate
at which the anode rod is consumed. In general, the
higher the average system temperature the faster the
breakage, the glass should be replaced immediately.
This will reduce the likelihood of water accumulating
inside the collector and deteriorating the insulation.
rate of corrosion. By changing the anode rod after the Contact your installation contractor.
fifth year of system operation, and every three to five
years thereafter, it is possible to extend the life of the
solar storage tank. Periodic replacement of the anode
9.7 If you detect a glycol or water leak, or the glycol
loop pressure drops unexpectedly, contact your
rod in your solar storage tank can significantly extend installation contractor immediately to diagnose the
the tank life.
problem and recharge the system.
9.3 The solar storage tank also should be flushed
9.8 If it’s been a sunny day and you don’t have hot
annually to minimize sediment build-up on the bottom water, first make sure that the controller is set in the
of the tank. If you live in an area with high mineral
automatic position. If the controller is properly set
content in your water, flush the tank on a semi-annual and the pump has not been running, unplug the line
basis. Disconnect the power to the solar tank at the
circuit breaker or time switch (if present) before
flushing. Turn the controller to the off position.
cord from the controller receptacle and plug the pump
directly into a nearby 115 volt outlet. If the pump does
not run it may need to be replaced. If the pump does
run when plugged directly into the wall outlet, the
problem may be located in the controller or one of the
10k ohm sensors. Contact your installation contractor
for service.
Open the flush valve on the bottom of the storage
tank (No. 15) and drain a sufficient volume of water
to eliminate the sediment. After the procedure is
complete make sure the tank is completely full of
water before restoring power to the thermostat and
heating element. Turn the controller to the "on"
position.
9.9 If you have a full tank of hot water before bed
and the solar storage tank is cold in the morning, the
check valve (No. 4) may not be seating correctly and
should be cleaned or replaced. Also make sure that
the circulating pump is not running after 6:00 p.m.
If the pump is running and the control indictor light
"Solar" #1 is on after 6:00 p.m., check both sensors to
9.4 If you live in a dusty climate it is a good idea to
wash off the dirt that settles on the collector glass
once a month. Clean glass allows the collector to
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fig.19d
VALVE POSITION DIAGRAM
2-TANK SYSTEM
see that they calibrate to 10K ohm resistance at 77°F.
If you find a defective sensor replace it immediately.
immediately when you reconnect the circuit breaker.
It the reset button does not click and you do not
Note that in a two tank system nighttime heat loss will have hot water after one hour, the heating element or
be harder to detect, especially if you are operating in
the solar preheat mode. Check the line thermometers
(No. 3) in the collector loop piping to detect night
thermosiphoning.
thermostat may be defective. Contact your installation
contractor for service.
In two tank systems the conventional electric water
heater will be wired for electrical back-up. The solar
tank will serve solely as a storage tank and will not be
wired.
9.10 If the weather is poor and the auxiliary heating
element will not fire, the bright red reset button on
the thermostat may have to be depressed to be reset.
Single tank systems have one heating element and
thermostat. Double tank systems with conventional
electric water heaters have two heating elements and
thermostats (see fig 17, No. 29).
10) Rheem SYSTEM COMPONENT PARTS
See Figures 16 and 17 for the location of the specific
components numbered below.
Never remove the protective access plate on the
exterior of the solar storage tank or conventional
1) Rheem Solar Collector(s): Absorbs the sun's heat
energy and transfers this heat to the HTF circulating
water heater without disconnecting the 230 volt power through the collector. (Provided)
supply at the circuit breaker.
2) Collector Sensor: Wired to the system controller.
After the circuit breaker has been turned off, remove
the access plate on the storage tank or water heater
Works in conjunction with the tank sensor to
automatically turn your circulating pump on and off at
and depress the red reset button on the thermostat. If it preset temperature differentials. (Provided)
clicks when depressed the heating element should fire
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3) Tank and Line Thermometers: Used to determine
proper system operation. Line thermometers will
show an approximate 5 - 12° temperature dif ference
between the collector supply and return lines on sunny
days. In a single tank system the tank thermometer
12) Isolation Ball Valve: When closed in conjunction
with No. 14 will isolate the circulation pump for
repair or replacement. (Not Provided)
13) Circulating Pump: Circulates the HTF through the
will read the temperature of the water after the mixing collector loop. (Provided)
valve feeding your fixtures. In two tank systems
the thermometer will read the finished solar tank
14) Isolation Ball Valve: When closed in conjunction
temperature. (Provided)
with No. 12 will isolate the circulation pump for
repair or replacement. (Not Provided)
4) Check Valve: This valve is installed to stop or
minimize convective evening heat loss in the system.
The heat in the solar storage tank will rise through
the collector loop piping in the evening into the
much cooler solar collector and dissipate heat unless
prevented from doing so by a check valve. Check
valves are also sometimes referred to as one way
valves. (Provided)
15) Flush Valve: Used to drain the solar storage tank
and to flush sediment from the tank on an annual
basis. (Not Provided)
16) Tank Sensor: Wired to your controller. Works
in conjunction with the collector sensor to turn your
circulating pump on and off at preset temperature
differentials. (Provided)
5) Isolation Ball Valve: Used in conjunction with
component No. 10 to isolate the solar collector loop
from the solar storage tank. (Not Provided)
17) Cold Water Dip Tube: Forces incoming city
cold water to the bottom of the solar storage tank to
prevent mixing with the warm water at the top of the
tank. (Provided)
6) Pressure Relief Valve: Will release glycol loop
HTF at 150 PSI. If this valve opens and HTF fluid is
expelled contact your contractor immediately. This
valve also can be opened to drain the HTF from the
charged glycol loop for replacement. (Provided)
18) Differential Thermostat: Known as the controller.
Automatically turns the circulating pump on and off
when there is sufficient heat to be gained from the
solar operation. The controller also may be set to limit
high temperature build up in the solar storage tank.
(Provided)
7) Pressure Gauge: Indicates the pressure in the
charged glycol collector loop. (Provided)
8) Expansion Tank: Pre-charged with air to allow for
the expansion and contraction of the glycol HTF as it
heats and cools. (Not Provided)
19) Heat Exchanger: Transfers heat from the solar
collector loop to the potable water in the solar storage
tank. (Provided)
9) Charge Valve: Used to charge the collector loop
with glycol and also to eliminate air from the system.
(Not Provided)
20) Anode Rod: The "sacrificial" anode rod is
installed in your solar storage tank to prevent
corrosion to the tank lining by neutralizing aggressive
water action. Anode rods have a finite life and
require periodic replacement depending on annual
tank temperatures and water quality. Determine
10) Isolation Ball Valve: Used in conjunction with
component No. 5 to isolate the solar collector loop
from the solar storage tank. Also used with the charge a replacement schedule with your installation
valves to fill and pressurize the collector glycol loop
contractor. (Provided)
(Nos. 9 and 11). (Not Provided)
21) Heating Element & Tank Thermostat: The solar
storage tank is equipped with an auxiliary 4500 watt,
11) Drain/Purge Valve: Used to charge the collector
loop with glycol, purge air from the loop and drain the 230 volt electrical heating element. The thermostat
heat exchange fluid. (Not Provided)
controls the temperature setting of the auxiliary
heating element. (Provided)
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22) Temperature and Pressure Relief Valve:
Universally required by the plumbing code on water
heaters. Will automatically release and dump water at
either 150 PSI of pressure or 210° F in temperature.
(Provided)
time switch is a highly recommended option. (Not
Provided)
34) Thermal Well (Not Pictured)
11) Rheem SYSTEM MODEL NUMBERS:
23) Cold Water Supply Line Isolation Ball Valve:
When open allows potable water to fill the solar
storage tank or back-up water heater. When closed
RS80-48BP
RS120-64BP
isolates the solar storage tank and backup water heater WWW.RHEEM.COM
from the pressurized city cold water supply line. (Not
Provided)
PLEASE VISIT OUR WEB SITE FOR NEW
PRODUCT UPDATES, ANSWERS TO
FREQUENTLY ASKED QUESTIONS (FAQ) AND
USEFUL INFORMATION ABOUT SOLAR WATER
HEATING SYSTEMS.
24) Three Way Ball Valve: Used in conjunction with
component No. 26 to establish the proper mode of
system operation. (Not Provided)
25) Isolation Ball Valve: Used in conjunction with
component No. 24 to completely isolate the solar
storage tank for repair or replacement as necessary.
(Not Provided)
26) Three Way Ball Valve: Used in conjunction with
component No. 24 to establish the proper mode of
system operation. (Not Provided)
27) Cold Water Dip Tube: See No.16 above. 28)
Anode Rod: See No. 18 above. 29) Heating Elements
and Thermostats: See No. 19 above. In a two tank
system the back-up electric water heater has two
heating elements and two thermostats. (Provided)
30) Temperature and Pressure Relief Valve: See No.
22 above. (Provided)
31) Optional Isolation Ball Valve. Use with
component No. 26 to completely isolate the back-up
water heater for repair or replacement. (Not Provided)
32) Mixing Valve: Automatically blends hot water
from the solar storage tank with incoming city cold
water to an acceptable set point. A mixing valve must
be installed on every Rheem solar water heating
system. (Provided)
33) Optional Time Switch: Allows you to
automatically or manually turn the auxiliary heating
element in the solar storage tank on and off. A
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35
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IF YOU NEED SERVICE
1. Should you have any questions about your new water heater, or if it
requires adjustment, repair, or routine maintenance, it is suggested that you
first contact your installer, plumbing contractor or previously agreed upon
service agency. In the event the firm has moved, or is unavailable, refer
to the telephone directory, commercial listings or local utility for qualified
service assistance.
2. Should your problem not be solved to your complete satisfaction, you
should then contact the Manufacturer’s National Service Department at
the following address:
1241 Carwood Court
Montgomery, Alabama 36117
Phone: 1-800-432-8373.
When contacting the manufacturer, the following information will be
requested:
a. Model and serial number of the water heater as shown on the rating plate
attached to the jacket of the heater.
b. Address where the water heater is located and physical location.
c. Name and address of installer and any service agency who performed
service on the water heater.
d. Date of original installation and dates any service work was performed.
e. Details of the problems as you can best describe them.
f. List of people, with dates, who have been contacted regarding your
problem.
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