Girard Products GSWH-1 User manual

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GIRARD
PRODUCTS, LLC
Owner’s
Manual
Model:
GSWH-1
CAUTIO :
Read and Follow
all the Safety Rules
and Instructions
before operating
this Appliance
Girard Products LLC, 1361 Calle Avanazado, San Clemente CA 92673 U.S.A
Owner’s Manual Part No. XXXXX REV . D 72010
Demand
Tankless
Water Heater
Power Blower Induced Draft
Dual BTU
•
Operation
• Installation
•
Service and Maintenance
Installation and service
must be
performed b a recommended
installer, service agenc or gas
supplier
This water
heater is certified for
installation in Recreation Vehicles
(RV’s) and is not for use in Marine or
Space Heating Applications
Patent Pending
LP Gas

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TA KLESS WATER HEATER - Model GSWH-1
Installer/Customer Responsibilities
• Installation and Service must be performed by a Girard Products LLC recommended
installer, service agency or gas supplier.
• Do not attempt installation as a Do-it-Yourself project
• Read and observe all safety rules
• Shut off gas appliances and pilot lights when refueling.
• Keep these instructions and warranty for future reference
• Follow all applicable State and Local Codes
• Follow a regular schedule of maintenance as outlined in this manual
This is the safety alert symbol. It is used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death. Failure to follow these alerts could result in Fire,
E plosion or even Death.
WAR I G – FIRE OR EXPLOSIO
WAR I G: These instructions must be followed exactly, or a fire or explosion
may result causing property damage, personal injury or death.
 Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this
or any other appliance.
 FOR YOUR SAFETY --- WHAT TO DO IF YOU SMELL GAS
o DO OT attempt to light any appliance.
o DO OT touch any electrical switch, or use any phone or radio in the vehicle.
o DO OT start the vehicle's engine or electric generator.
o Evacuate all persons from the vehicle.
o Shut off the gas supply at the gas container or source.
o Contact the nearest certified service technician or gas supplier for repairs.
o If you cannot reach a certified service technician or gas supplier, contact the
nearest fire department.
o DO OT turn on the gas supply until the gas leak(s) has been repaired.
 Installation and Service must be performed by a Girard Products LLC recommended
installer, service agency or gas supplier.

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USA A D CA ADA - FOLLOW ALL APPLICABLE STATE A D LOCAL CODES
I THE ABSE CE OF LOCAL CODES OR REGULATIO S REFER TO CURRE T STA DARDS OF:
• Recreational Vehicles A SI A119.2/ FPA 501C.
• CSA standard Z240 RV Series, Recreational Vehicle.
• Park Trailers A119.5
• ational Fuel Gas Code A SI Z223.1 and/or CA /CGA B149 Installation Codes
• Federal Mobile Home Construction & Safety Standard, Title 24 CFR, part 3280, or when this
Standard is not applicable, the Standard for Manufactured Home Installations
(Manufactured Home Sites, Communities and Set-Ups), A SI A255.1 and/or CA /CSA-Z240
MH Series, Mobile Homes.
• ational Electrical Code A SI/ FPA o. 70 and/or CSA C22.1
CRITICAL I STALLATIO WAR I GS
• Installation and Service must be performed by a Girard Products LLC recommended
installer, service agency or gas supplier.
• This product is not designed for Do-it-Yourself Installation.
• Install O LY in recreation vehicles (RV’s). RV’s are recreation vehicles designed as
temporary living quarters for recreation, camping, or travel use having their own power
or towed by another vehicle. This water heater is OT designed for Marine or Space
Heating applications
• All combustion air must be supplied from the outside of the RV, and all products of
combustion must be vented to the outside of the RV.
• DO OT vent water heater with a venting system serving another appliance or to an
outside enclosed porch area.
• DO OT modify water heater in any way. This is dangerous and will void the warranty.
• DO OT alter water heater for a positive grounding system.
• DO OT HI-POT water heater unless the electronic ignition control (circuit board) has
been turned ‘OFF’ (Power switch is in “Off” position)
• DO OT use battery charger to supply power to water heater even when testing.
• Protect building materials from flue gas exhaust.
• Install the water heater on an exterior wall, with access door opening to the outdoors.
• DO OT lift the water heater or carry it by holding the blower assembly support
bracket/exhaust tube.
• DO OT modify the length of the wires protruding past the strain relief from the rear of
the housing.

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I STALLATIO
The following instructions apply to the most common type of installation for irard Products SWH-1
water heater. Consult with irard Products, LLC technical support or engineering department if you have
any additional questions regarding your specific installation/application.
Select a suitable location
The water heater is designed to be installed on a floor or a fixed platform with access to water, gas and
electrical connections from the back. It is recommended that the SWH-1 be located as near the center
of the coach as possible.
DO OT I STALL I A AREA WHERE O E OR BOTH THE I LET AIR VE T A D FLUE VE T
CA BE COVERED WHE A DOOR OR ACCESS PA EL OF THE VEHICLE IS OPE ED.
DO OT I STALL WHERE THE FLUE VE T IS CLOSER THA O E FOOT I ALL DIRECTIO S
FROM A Y WI DOW OR OPE I G I TO THE VEHICLE.
DO OT I STALL THE WATER HEATER OR A Y OTHER APPLIA CE WHERE IT CA VE T I TO
A AREA COVERED BY A AW I G, CA OPY OR A Y OTHER E CLOSURE.
(Note: The water heater can be installed under an RV roll-out/retractable type awning providing the
awning does not have an enclosure such as a screen room and/or some type of “walled enclosure”)
IMPORTA T!
• For proper operation this water heater requires a minimum water flow of 1.0
Gallon per Minute (gpm) for each Hot Water faucet it supplies.
WAR I G! CAUTIO !
 Improper installation, adjustment, alteration, service or maintenance can cause
property damage, personal injury or loss of life
 Installation and Service must be performed by a Girard Products LLC
recommended installer, service agency or gas supplier.
 This product is not designed for do-it-yourself installation.
 DO OT lift the water heater or carry it by holding the blower assembly support
bracket/exhaust tube (Figure 1).

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Site Preparation
To install on carpeted area you must install a metal or wood panel under the water heater that extends at
least 3 inches beyond the width and depth of the unit. If water leakage can result in damage to the
adjacent area, install a drain pan that can be drained to outside of the vehicle, under the water heater.
Verify that a clearance of 1 inch will remain after installation between the top surface of the water heater
and any combustible material. 0 inch clearance is acceptable for the sides.
Make sure that the front edge of the opening is surrounded by a solid frame to firmly anchor the water
heater; if needed, build an appropriate frame using 2”X2” elements (Figure 1)
The rough opening for the SWH-1 should be 12.75” X 12.75” with right angle corners. The exterior wall
opening must be the same dimensions with no radius corners.
Figure 1
Ensure that water and gas connections from the vehicle are in place for installing the unit. Allow sufficient
length and flexibility in the water and gas lines to reach the connections while the unit is partially inserted
into the opening.
Water Heater Installation
Remove the water heater from the box by grasping the metal sides of the housing and lifting
upward until it is free of the box.
IMPORTA T!
• Lifting or moving the water heater using the Blower Assembly Support
Bracket/Exhaust Tube (Figure 1) may result in improper alignment of the vent
and/or improper alignment of the Sail Switch.
Blower Assembly Support
Bracket/Exhaust Tube

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Partially insert the water heater into the opening and connect both Hot and Cold water lines to the
appropriate ½”NPT fittings. Connections can be made using PEX swivel nut adaptors with NPS straight
threads and a cone seal or with a standard ½”FPT nut. The PEX swivel nuts require only hand tightening.
When using a standard ½”FPT nut use Teflon tape and/or PTFE pipe paste and do not over-tighten
(Figure 2, page 6).
Connect the gas using a 3/8” LP as line. Place the grommet on the line ahead of the compression nut
before flaring the tube (Figure 2). Use additional caulking as needed to complete a permanent seal
with the housing around the rubber grommet.
Figure 2
PRODUCT DAMAGE!
• Excessive torque will damage the Cold Water and Hot Water Inlets. DO OT over
tighten.
(Orange
:
Option
)
(Black: Uncut)
(Black: Cut) Ground
IMPORTA T! CRITICAL I STALLATIO
• DO OT cut any wires.
• The length of the external wires, those wires extending beyond the strain relief
from the rear of the housing (Figure 2), must OT be shortened for any reason.
Shortening these wires will prevent the removal of the Control Housing during
servicing and/or testing.

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A: Installation of water heater with separate flange
1. Complete the “skin” application to the vehicle’s outer wall.
2. Position water heater housing into the frame opening with the front edge aligned evenly to the exterior
wall (See Figure 3).
3. To prevent water and air leaks apply sufficient caulking around the entire frame opening and the
exterior edge of the water heater housing. Use a suitable caulking material that will result in a
permanent seal between the water heater and the vehicle’s frame.
4. Press the side walls of the water heater housing firmly against the frame to expel any bubbles and
ensure a good bond.
5. When ready to proceed, apply additional caulking or butyl tape to the back of the door flange that will
contact the RV sidewall around perimeter of the opening.
6. Insert the door flange into the water heater housing and press the flange firmly against the sidewall.
7. Secure the flange to the vehicle using No.8 – ¾” flat head screws through each hole along the
perimeter. Verify that a tight seal exists between the side wall and the flange. If not, repeat
above steps.
8. Align each hole along the inside frame of the flange with the corresponding holes in the water heater
housing and secure to the frame using No.8 – ¾” flat head screws using two screws per side.
9. Remove any excess caulking and clean all surfaces.
Figure 3
Apply caulking along each side
OTICE
• If you wish to install the flange as an integral part of the water heater housing
proceed to B: Installation of water heater with Integral Flange (below).

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B: Installation of water heater with integral flange
1. Protect the side wall with masking tape or other suitable means to insure that it is not damaged
while installing the water heater.
2. Position the water heater so that the front edge extends from the opening approximately 2” and
insert the door flange into the housing.
3. Permanently attach the flange to the housing using stainless steel screws or stainless steel rivets
with recommended grip range of .188” to .129” and hole size of .129” to .133”.
4. To prevent water leaks apply a good amount of caulking or butyl tape on the sidewall around
perimeter of the opening that will be covered by the flange and along the front edge of the
housing that will contact the mounting frame.
5. Slide the water heater in place into the opening and press the door flange against the sidewall.
6. Secure water heater housing unit to the vehicle using No.8 – ¾” flat head screws through each
hole in the door flange (Figure 4). Verify that a tight seal exists between the side wall and the
flange. If not, repeat above steps.
Figure 4
C: Installation of mode switch
1. SET THE POWER SWITCH TO THE “OFF” POSITION and connect the power wires to a 12VDC
circuit from the DC panel protected with a 10 amp fuse. The Red wire is positive (+) and the Black
wire is negative (-) and is internally connected to ground.
2. To install the remote Mode Switch (Figure 5), connect one pole of the switch to the Auto/Low wire and
the other pole to ground.
Figure 5
Auto
Low
Mode Switch

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D: Functional tests
1. Verify the power switch is in the “OFF” position
2. Turn on the water supply to the unit.
3. Open and then close the hot AND cold water faucets in the vehicle to fill the pipes with water. Close
the faucets when the water is flowing smoothly and verify that there are no leaks at the connections
and within the water heater.
4. Turn on the gas supply and check all gas connections for gas leaks with leak detection solution.
5. Turn the power switch to the “ON” position.
6. Open a hot water faucet and verify that the unit lights and supplies warm water at the faucet.
7. WHILE THE U IT IS RU I G, verify that there are no leaks at the gas connections to the control
valve and to the burner.
: Door Installation
After mounting and securing the unit in the chosen location, install the door making sure that:
1. The door mounting posts on the door flange are properly aligned with corresponding holes along
the door’s lower edge. If needed, carefully re-align the posts with pliers.
2. The exhaust tube extends beyond the door’s face through the clearance hole BUT not beyond the
face of the door. Be sure that the exhaust tube is seated properly. See Figure 6
3. Ensure that the door lock operates smoothly and engages easily.
WAR I G – FIRE A D/OR EXPLOSIO
WARNING: These instructions must be followed exactl , or a fire or explosion ma result
causing propert damage, personal injur or death.
DO OT use matches, candles or other sources of ignition when checking for gas leaks.
WAR I G! PRODUCT DAMAGE
• DO OT FORCE THE DOOR CLOSED with the tube pressed inside the door.
Doing so may damage the door or the exhaust tube and misalign the sail switch.

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Figure 6
This completes the installation of the Model GSWH-1 water heater.
OPERATI G I STRUCTIO S
Inser exhaus ube
hrough door opening
WAR I G! CAUTIO !
• Disconnect the unit from the gas supply line during any pressure testing of the gas
system in excess of ½ PSIG (3.4 kPa, 14” water column [W.C.]). DO NOT set inlet
pressure higher than the maximum indicated on rating plate of gas valve (13”
W.C.).
• If an external electrical source is utilized, the appliance, when installed, must be
electrically grounded in accordance with local codes or, in the absence of local
codes, with the National lectrical Code, ANSI/NFPA 70 and/or the CSA C22.1,
Canadian lectrical Code.
CO SUMER SAFETY WAR I G
• Use with LP gas only.
• Shut off gas appliances and pilot lights when refueling.
• Turn gas OFF at the LP tank when vehicle is in motion. This disables all gas
appliances and pilot lights. Gas appliances must never be operated while vehicle is in
motion.
• LP tanks must be filled by a qualified gas supplier only.
• Should overheating occur, turn gas OFF at the LP tank and turn the operating switch
to the OFF position.
• DO OT TUR O THE COLD WATER FAUCET TO ADJUST THE TEMPERATURE.

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Understanding How the Girard Tankless Water System Works
The irard Products model SWH-1 is a new ‘induced-draft’, tankless water heater designed specifically
for Recreation Vehicles (RV). Its configuration and size are consistent with the tank based RV water
heaters currently in use and is designed for OEM’s and after market use by the RV industry. A main
feature of the SWH-1 is a Dual BTU burner that automatically adjusts the level of the flame (High or
Low) depending on the temperature of the inlet water.
A tankless water heater heats water while it is being used i.e., on demand. The output temperature of
the water depends on the temperature of the inlet water AND the amount of hot water that is drawn. If the
inlet water temperature is over 65ºF the model SWH-1 will generate water in the range of 105°F to
120°F (on Low flame) depending on the water flow selected by the user.
To operate, first set the Power Switch to the O position and set the Mode Switch to AUTO, then
FULLY open the HOT Water Faucet by turning the faucet knob counter clockwise; the water will begin to
heat up once the water in the piping has been purged. DO OT TUR O THE COLD WATER. Then
DECREASE the flow of the water (turn the faucet knob clockwise) until you achieve the desired
temperature. The hot water valve behaves very much like a typical mixing valve: it INCREASES the
temperature when the water flow is REDUCED. To DECREASE THE WATER TEMPERATURE (i.e.,
make the water cooler), increase the flow of the water by turning the faucet knob counter clockwise
thereby increasing the flow. DO OT USE COLD WATER TO ADJUST THE TEMPERATURE.
In a conventional installation the Girard Tankless Water Heater is connected to:
1. The RV’s cold water system deriving its water input from a pressurized (45 psi or greater) source
such as a shore connection or an RV water pump connected to the fresh water storage tank.
2. The RV’s Hot water system (i.e. faucets and shower)
3. The RV’s LP as system capable of supplying its rated BTU requirement.
4. The RV’s 12VDC filtered electrical power distribution panel utilizing a 12 Volt, 10 amp fused line.
Operation
Open the door of the irard Products model SWH-1 to acquaint yourself with the unit and its controls.
The small user panel located on the left side of the unit (see Figure 7) includes:
1. LED Indicator
2. Power ON/OFF switch
IMPORTA T!
• The presence of a flow restrictor in the hot water line may limit your ability to
reach a comfortable water temperature. For best results remove the restrictor in
the shower head.

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Figure 7
To begin operation simply set the switch to the ‘ON’ position (Figure 7), set the Mode switch (Figure 5) to
the Auto position, AND open the HOT WATER faucet you want to use. The unit will automatically light
and start heating your water. DO NOT use cold water to adjust the temperature.
By manually setting the MODE switch to automatic, the model SWH-1 automatically senses and adjusts
the flame level (High or Low) depending on the temperature of the inlet cold water (the water coming into
the SWH-1). The flame will change from High to Low if the temperature of the inlet water goes above
70°F and will switch back to High when the inlet water goes below 65°F. Manually switching the Mode
switch from AUTO to LOW overrides the automatic function and forces the flame to stay in LOW even if
the inlet water is less than 65°F. This can be desirable when the cold water inlet temperature is very cold
and the inlet water pressure is below 1.0 gpm which could result in limiting (see Notice below). The
system will remain in Low until manually switched to Auto.
LED Indica or
ON/OFF swi ch
O
I
POWER
ON
OFF
OTICE
You will notice that if you increase the flow of hot water (i.e., open the faucet more) the
temperature will automatically DECREASE since more water is being heated. If, on the
other hand, you decrease the water flow (close the faucet) the temperature will I CREASE.
DO OT TUR O THE COLD WATER.
If you reduce the water flow too much, which will result in HOTTER water, the rising
temperature will increase and trigger the Safety Cut Off or ‘limit switch’ (125°F) and the
burner will shut off. This is commonly referred to as “limiting” and is a safety feature
designed to protect against accidental scalding. Whenever the temperature rises to a
comfortable level, I CREASE the water flow (open the faucet) to maintain the desired
temperature and prevent the burner from shutting off (limiting).
If a shut off does occur, you will notice a decrease in the water temperature. In this case do
not close the faucet, but rather open it more and the water heater will relight after a few
seconds; you may then re-adjust the temperature by reducing the flow appropriately (i.e.,
less than the previous setting to avoid repeated limiting).

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WI TERIZATIO
Freezing of the water heater and its plumbing components will result in severe damage not covered by
warranty. For this reason it is advisable to follow the recommendation(s) below if the unit is to be stored in
a freezing environment or for long periods of time.
At the start of the winter season or before traveling to a location where freezing conditions are likely, the
unit must be winterized. The very small amount of water present in the heat exchanger DOES NOT
require the installation of a bypass kit.
Winterization can be accomplished using one of the two common methods of winterization used for RV
water systems:
• Compressed Air method: Drain all water from the system opening one tap at a time and using
compressed air to purge all remaining water.
• Anti-freeze method: Follow the recommendations of the Recreational Vehicle manufacturer and
fill the system with a non toxic anti-freeze. Make sure that the anti-freeze flows from each tap to
complete the process.
PRESSURE- TEMPERATURE RELIEF VALVE
This water heater is equipped with a temperature and pressure relief valve that complies with the
standard for Relief Valves and Automatic as Shutoff Devices for Hot Water Systems, ANSI Z21.22.
THIS VALVE IS A SAFETY COMPO E T A D MUST OT BE REMOVED FOR A Y
REASO OTHER THA REPLACEME T.
WHE REPLACI G THE PRESSURE – TEMPERATURE RELIEF VALVE
• DO NOT install anything less than a combination pressure–temperature relief valve certified by a
nationally recognized testing laboratory that conducts periodic inspections of such products and
certifies them as meeting the requirements for Relief Valves and Automatic as Shutoff Devices for
Hot Water Supply Systems, ANSI Z21.22. Valve must have a maximum set pressure not to exceed
150 psi.
• Install valve into opening provided and marked for this purpose on water heater.
• Installation must conform with local codes or in the absence of local codes, American National
Standard for Recreational Vehicles, ANSI A119.2/NFPA 501C.
WAR I G – SCALDI G I JURY-EXPLOSIO
• Valve is not serviceable; if defective it must be replaced.
• Tampering with valve will result in scalding injury. Do not place a plug or reducing
coupling on outlet part of valve. If you use a discharge line allow complete
drainage for both valve and line.
• Tampering with valve will void the warranty.

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MAI TE A CE
Routine Maintenance
We recommend that the SWH-1 water heater be inspected monthly by the user and at least once a year
by a irard Products LLC recommended service technician.
Before an inspection, make sure that the LP as and Water systems are turned on.
A routine inspection must include the following items:
1. Inspect the integrity of the sealing (caulking or tape) between the side wall and the door of the
water heater and ensure that the unit is solidly mounted to the vehicle.
2. Verify that the air inlet openings (louvers) are completely open and clear of any debris including
mud, leaves, twigs, insects etc. Remove all obstructions to allow full air flow.
3. Insects, including mud wasps and spiders, can build nests in the Exhaust Tube Outlet and
Exhaust Collector which will affect the performance of the unit. Inspect the Flue Outlet Tube and
Exhaust Collector to make sure that they are unobstructed and that the screen is clean. If debris
or insects are present, clean and vacuum to remove any remaining debris. The use of any type
of aftermarket screen to cover the vent is not permitted and will void the warranty.
4. Open the cover and verify that no debris or extraneous combustible materials are present
anywhere (especially in the area of the burner and the gas controls); remove any item present
and wipe clean the bottom of the housing.
5. Inspect the interior surface of the housing for any cracks or corroded areas that could allow
penetration of gases into or out of the interior of the vehicle. Check especially around the Hot
Water, Cold Water, as and electrical connections.
6. Check that all wire connections are firmly in place and there are no signs of chafing or cracks on
the insulation. Verify that the spark ignition cable between the Control Board and the igniter is
securely in place and not shorted to any metal component.
7. At least once a year activate the Relief Valve by lifting the lever on top of the valve. MAKE SURE
THAT THE WATER HEATER HAS NOT BEEN ON RECENTLY AND THE WATER FLOWIN
FROM THE HOT WATER OUTLET IS COLD.
8. Turn on the power to the water heater and open a hot water faucet to inspect the flame of the
burner. The flame should be of the normal bluish appearance that indicates proper combustion.
This can be accomplished by observing the flames through the sight hole and looking at the
burner under the edge of the heat exchanger (See Figure 8).
Figure 8

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Troubleshooting
Whenever the user opens a hot water faucet, the water activates the “Flow Switch”, which provides a
thermostatic request to the Circuit Board for Ignition. Upon the request the Circuit Board performs the
following tasks:
1. Microprocessor reset and self-check
2. Verification that no flame is present
3. Verification that the Sail Switch is open
4. Turn on the Blower
5. Upon detection of combustion air flow, starts the ignition routine by opening the gas valve and
supplying the first sparking sequence
Normally the ignition trial is successful and the user will start receiving warm water at the faucet.
The Control Board detects the conditions that could result in a hazardous situation and either prevents
the as ignition to occur or immediately shuts down the flame by interrupting the gas flow to the burner.
The failures detected by the Control Board are:
Failure to light
If the burner fails to light, or if flame is not detected during the first ignition attempt, the gas valve is de-
energized and the control goes through an inter-purge delay before ignition is attempted again. The
control will attempt two additional ignition sequences before going into ‘LOCKOUT’ after which the valve
relay will remain de-energized and the blower will turn off after a five minute delay. (Lockout Condition)
Recovery from ‘lockout’ requires a manual reset by either resetting the thermostatic demand (turning off
the water flow) or turning off the power for a period of 5 seconds and then opening the HOT Water Faucet
Flame failure
If the established flame signal is lost while the burner is operating, the control will respond within 0.8
seconds, the gas valve is de-energized and a new inter-purge and ignition routine will begin. If the burner
does not light, the control will de-energize the gas valve and will make two more attempts to relight the
burner. If the burner does not relight after the three trials the control will go into LOCKOUT as noted
above in "Failure to light”. If flame is re-established, normal operation resumes.
Combustion airflow problems
If the airflow signal is lost, or the hi-limit switch (See Notice Page 12) opens during operation, the gas
valve is immediately de-energized and the blower stays on. If the switch closes again, a normal ignition
sequence will resume. If not, and if this condition persists for more than five minutes, the control will enter
lockout with the blower off.
Diagnostics feature
If the unit stops operating normally, please check the LED indicator on the user panel.
If the LED is on or blinking, the blinking pattern will notify you of the fault detected by the Control Board as
follows:
• Steady On - Internal Control Fault
• 1 Flash - Air Fault
• 2 Flashes - Flame Detection Error
• 3 Flashes – Lockout
• 4 Intentionally ‘NA’ – Reserved for Future Diagnostics
• 5 Flashes - Low voltage
The blinking LED pattern will be repeated at intervals of three (3) seconds.

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Functional Description
We include here additional information needed to identify the various components of the system in order
to facilitate communications of the user with irard Products or an authorized Service Center for any
questions regarding the proper operation of the water heater.
The model SWH-1 consists of the following main sub-systems and components:
1. Water Sub-System:
1.1. Flow Switch
1.2. Heat Exchanger
1.3. Limit Switch / Emergency Cut Off (ECO): (Normally closed; open T>122°F)
1.4. P/T Valve: to provide pressure relief in case of overheating
2. Gas Sub-System
2.1. Regulator with Dual Solenoid Valve
2.2. Dual BTU (Hi/Lo) valve (Powered=Maximum output / Unpowered=Reduced output)
2.3. Burner (Blade type; high efficiency)
2.4. Auto/Low thermostat: (normally closed; opens at 70°F.)
3. Flue Sub-System
3.1. Flue Collector
3.2. Exhaust Blower
3.3. Flue outlet
4. lectrical Sub-System
4.1. 12VDC connection wires
4.2. Power switch
4.3. Blower Motor
4.4. Microprocessor based Circuit Board (Spark Igniter, Safety and Diagnostics)
4.5. Spark Igniter
4.6. Sail switch to detect air flow at the exhaust.
4.7. Mode Selector (Auto/Lo) to control the operation of the Dual BTU valve
In the following pages we present:
1. Figure 9: Shows an exploded view of the SWH-1 water heater with identification labels for all
components.
2. Figure 10: A wiring diagram with all electrical components showing all interconnections and the
wire colors adopted.
3. Figure 11: A Circuit Ladder Diagram to illustrate the Control logic and functionality of each
electrical component

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Flow Swi ch
Sail Swi ch
Circui
Board
Igni er
Blower
+12V
Gas
Valve
-
12V Ground
ECO
Hea Exchanger
Exhaus
Burner
Power
Blower
Cold
Ho
-
12VDC Ground
(Black)
LED (Diagnos ics)
Gas Valve (Brown)
12VDC Flow / Limi / Air
12VDC
(Red)
Ground (Green)
Power
Chassis
Relay
HI-LO
WUD
+12V
-
12V or Mode SW
+12V o Solenoid Valve
Figure 10

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Figure 11
Specifications
The table below summarizes the main performance specifications of the Model SWH-1:
BTU/HR 27,000 – 34,000
Fuel Propane (LP as)
Inlet Pressure 10.5” WCI Min to 14” WCI Max
Manifold Pressure 8” – 10” WCI
Power Input 12VDC < 3 amp
Water Operating Pressure 125 PSI Max
Max Water Temperature 125 º F
Dimension Width: 12.5” - Height: 12.5” - Depth 15.5”
Shipping Weight 22 lbs
+12VDC
ECO
TS
Spark/
Sense
Ground
Gas Valves
Circui Board
Hi/Lo
Valve
Power
Blower
AIR
THS
REM
GAS
GND
HV
Flow
S
W
Sail
S
W
Blower Mo or
-
12VDC
LED
Relay
Hi/Lo
TS
WUD
TS
Ladder Diagram
LEGEND
SW Swi ch
ECO Emergency Cu Off
TS Thermos a
Solenoid
(Op ion)
Power SW
-
12VDC
(Op ion)
Mode SW

20 | P a g e
GIRARD PRODUCTS, LLC GSWH-1 WATER HEATER
TWO YEAR LIMITED WARRA TY
irard Products, LLC warrants to the original owner (purchaser) that this product will be free of defects in
material or workmanship for a period of two years from the original date of purchase whether or not actual
usage begins on that date. irard Products liability hereunder is limited to the replacement of the part(s),
repair of the part(s), or replacement of the product or part(s) with a reconditioned or new product/part(s) at
the discretion of the irard Products. This warranty is void if the product has been damaged by accident,
unreasonable use, misuse, neglect, tampering or other causes not arising from defects in material
workmanship. This limited warranty extends to the original owner of the product only, is not transferrable
and is subject to the following conditions:
1. For a period of two years from the date of purchase, irard Products will replace any parts that are
found defective and will pay a warranty service allowance directly to the recommended irard Products
Water Heater Service Center at rates mutually agreed upon between irard Products and its
recommended service centers. As an owner, you are required to provide proof of purchase date through
a Bill of Sale or other appropriate record.
2. Replacement parts will be shipped FOB the shipping point within the Continental United States, Alaska
and Canada to the recommended service center performing such repairs. All freight, shipping and
delivery costs shall be the responsibility of the owner.
3. Service calls to customer’s location are not considered part of these charges and are, therefore, the
responsibility of the owner.
4. Before having warranty repairs made, confirm that the service center is a recommended service center
for irard Products, LLC Water Heaters. DO OT PAY THE SERVICE CE TER FOR WARRA TY
REPAIRS WITHOUT PRIOR APPROVAL FROM GIRARD PRODUCTS, LLC; SUCH PAYME TS WILL
OT BE REIMBURSED.
5. The defective parts (or water heater) become the property of irard Products, LLC and may need to be
returned to irard Products Technical Support Department. irard Products reserves the right to examine
the alleged defective part or water heater. All returned parts and/or product must be individually tagged
with the water heater’s model, serial number, date of installation and detailed explanation of defect.
6. This warranty does not cover the following items classified as normal maintenance:
• Adjustment of gas pressure
• Cleaning or adjustment of flue
• Adjustment of pressure-temperature relief valve
• Cleaning, replacement, and adjustment of burner orifice
7. This warranty applies only if the unit is installed according to the installation instructions provided and
complies with local and state codes.
8. The warranty period on replacement parts (or water heater) is the unused portion of the original
warranty period or ninety (90) days, whichever is greater.
9. This limited warranty does not apply to damage caused by accident, abuse, misuse (including
damage caused by service performed by anyone who is not a Girard Products LLC recommended
installer), misapplication, alterations, modifications, water damage or freezing.
10. THIS WARRA TY A D THE REMEDIES SET FORTH ABOVE ARE EXCLUSIVE A D I LIEU OF
ALL OTHER WARRA TIES, REMEDIES A D CO DITIO S, WHETHER ORAL OR WRITTE ,
EXPRESS OR IMPLIED. GIRRD PRODUCTS LLC SPECIFICALLY DISCLAIMS A Y A D ALL
IMPLIED WARRA TIES, I CLUDI G WITHOUT LIMITATIO , WARRA TIES OF
MERCHA TABILITY A D FIT ESS FOR A PARTICULAR PURPOSE. IF GIRARD PRODUCTS LLC
CA OT LAWFULLY DISCLAIM IMPLIED WARRA TIES U DER THE LIMITED WARRA TY, ALL
SUCH WARRA TIES, I CLUDI G WARRA TIES OF MERCHA TABILITY A D FIT ESS FOR A
PARTICULAR PURPOSE ARE LIMITED I DURATIO TO THE DURATIO OF THIS WARRA TY.