Girard Products GSWH-1M User manual

Owner’s Manual
Girard Products LLC, 1361 Calle Avanazado, San Clemente CA 92673 U.S.A
Owner’s Manual Part No. 1GWH9407, REV. 1
CAUTION:
Read and Follow all
the Safety Rules and
Instructions before
operating this Appliance.
Demand Tankless Water Heater
LP Gas
Power Blower Induced Draft
Gas Modulation Control
Installation and service must be
performed by a recommended
installer, service agency 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.
Model: GSWH-1M
REVISION 1
1Page
• Installation
• Operation
• Service and Maintenance
Patent Pending
CSA Approved

TANKLESS WATER HEATER - Model GSWH-1M
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
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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, Explosion or even Death.
WARNING – FIRE OR EXPLOSION
WARNING: These instructions must be followed exactly, or a re or explosion
may result causing property damage, personal injury or death.
• Do not store or use gasoline or other ammable vapors and liquids in the vicinity of
this or any other appliance.
• FOR YOUR SAFETY --- WHAT TO DO IF YOU SMELL GAS
• DO NOT attempt to light any appliance.
• DO NOT touch any electrical switch, or use any phone or radio in the vehicle.
• DO NOT start the vehicle’s engine or electric generator.
• Evacuate all persons from the vehicle.
• Shut off the gas supply at the gas container or source.
• Contact the nearest certied service technician or gas supplier for repairs.
• If you cannot reach a certied service technician or gas supplier, contact the
nearest re department.
• DO NOT 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.

USA AND CANADA - FOLLOW ALL APPLICABLE STATE AND LOCAL CODES
IN THE ABSENCE OF LOCAL CODES OR REGULATIONS REFER TO CURRENT
STANDARDS OF:
• Recreational Vehicles ANSI A119.2/NFPA 501C.
• CSA standard Z240 RV Series, Recreational Vehicle.
• Park Trailers A119.5
• National Fuel Gas Code ANSI Z223.1 and/or CAN/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), ANSI A255.1 and/or CAN/
CSA-Z240 MH Series, Mobile Homes.
• National Electrical Code ANSI/NFPA No. 70 and/or CSA C22.1
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CRITICAL INSTALLATION WARNINGS
• 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 ONLY 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 NOT 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 NOT vent water heater with a venting system serving another appliance or
to an outside enclosed porch area.
• DO NOT modify water heater in any way. This is dangerous and will void the
warranty.
• DO NOT alter water heater for a positive grounding system.
• DO NOT HI-POT water heater unless the electronic ignition control (circuit board) has been
turned ‘OFF’ (Power switch is in “Off” position)
• DO NOT use battery charger to supply power to water heater even when testing.
• Protect building materials from ue gas exhaust.
• Install the water heater on an exterior wall, with access door opening to the outdoors.
• DO NOT lift the water heater or carry it by holding the blower assembly support bracket/
exhaust tube.
• DO NOT modify the length of the wires protruding past the strain relief from the
rear of the housing.

INSTALLATION
The following instructions apply to the most common type of installation for Girard Products
GSWH-1M water heater. Consult with Girard Products, LLC technical support or engineering
department if you have any additional questions regarding your specic installation/application.
Select a suitable location
The water heater is designed to be installed on a oor or a xed platform with access to water,
gas and electrical connections from the back. It is recommended that the GSWH-1M be located
as near the center of the coach as possible.
DO NOT INSTALL IN AN AREA WHERE ONE OR BOTH THE INLET AIR VENT AND FLUE
VENT CAN BE COVERED WHEN A DOOR OR ACCESS PANEL OF THE VEHICLE IS OPENED.
DO NOT INSTALL WHERE THE FLUE VENT IS CLOSER THAN ONE FOOT IN ALL
DIRECTIONS FROM ANY WINDOW OR OPENING INTO THE VEHICLE.
DO NOT INSTALL THE WATER HEATER OR ANY OTHER APPLIANCE WHERE IT CAN VENT
INTO AN AREA COVERED BY AN AWNING, CANOPY OR ANY OTHER ENCLOSURE.
(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”)
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WARNING! CAUTION!
• 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 NOT lift the water heater or carry it by holding the blower assembly support
bracket/exhaust tube (Figure 1).
IMPORTANT!
• For proper operation this water heater requires a minimum water ow of 1.0
Gallon per Minute (gpm) for each Hot Water faucet it supplies.

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 rmly anchor the
water heater; if needed, build an appropriate frame using 2” X 2” elements (Figure 1)
The rough opening for the GSWH-1M should be 12.75” X 12.75” with right angle corners. The
exterior wall opening must be the same dimensions with no radius corners.
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.
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Ensure that water and gas connections from
the vehicle are in place for installing the
unit. Allow sufcient length and exibility
in the water and gas lines to reach the
connections while the unit is partially
inserted into the opening.
Figure 1
IMPORTANT!
• 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.

Partially insert the water heater into the opening and connect both Hot and Cold water lines to
the appropriate ½”NPT ttings. 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. (Figure 2, page 6).
Connect the gas to the 3/8” LP Gas compression tting on the back of the Water Heater (Figure
2). Use two wrenches to tighten the compression tting to avoid damaging the unit.
Use additional caulking if needed to complete a permanent seal of the gas line with the housing.
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PRODUCT DAMAGE!
• Excessive torque will damage the Cold Water and Hot Water Inlets.
DO NOT over tighten.
IMPORTANT! CRITICAL INSTALLATION
• DO NOT 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 NOT be shortened for any reason.
Shortening these wires will prevent the removal of the Control Housing during
servicing and/or testing.
Figure 2

A: Installation of water heater with separate ange
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 sufcient 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 rmly 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 ange that will contact the RV sidewall around perimeter of the opening.
6. Insert the door ange into the water heater housing and press the ange rmly
against the sidewall.
7. Secure the ange to the vehicle using No. 8 - ¾” at head screws through each hole
along the perimeter. Verify that a tight seal exists between the side wall and the
ange. If not, repeat above steps.
8. Align each hole along the inside frame of the ange with the corresponding holes in
the water heater housing and secure to the frame using No. 8 - ¾” at head screws
using two screws per side.
9. Remove any excess caulking and clean all surfaces.
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NOTICE
• If you wish to install the ange as an integral part of the water heater housing
proceed to B: Installation of water heater with Integral Flange (below).
Apply caulking
along each side.
Figure 3

B: Installation of water heater with integral ange
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 ange into the housing.
3. Permanently attach the ange 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 ange 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 ange
against the sidewall.
6. Secure water heater housing unit to the vehicle using No. 8 - ¾” at head screws through
each hole in the door ange (Figure 4). Verify that a tight seal exists between the side wall and
the ange. If not, repeat above steps.
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Figure 4
C: Installation of 12VDC Power and Gas Modulation
Control (GMC)
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. Connect black wire to a ground
connection. The Red wire is positive (+) and the Black wire is
negative (-).
2. To install the remote Gas Modulation Control/GMC (Figure
5), connect the GAS MOD Box wire from the Water Heater to
the White wire from the GMC and Black wire from the GMC to
any accessible Ground wire/Ground connection of the vehicle.
Figure 5

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 ll the
pipes with water. (Purge air out of all water lines including washers, toilet and outside
faucets, if applicable). Close the faucets when the water is owing 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 and set the Gas Modulation Control for
maximum heat by turning the control knob fully clockwise.
6. Open a hot water faucet and verify that the unit lights and supplies warm water at the
faucet.
7. WHILE THE UNIT IS RUNNING, verify that there are no leaks at the gas connections to the
control valve and to the burner.
E: 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 ange 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.
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WARNING – FIRE AND/OR EXPLOSION
WARNING: These instructions must be followed exactly, or a re or explosion may result
causing property damage, personal injury or death.
DO NOT use matches, candles or other sources of ignition when checking for gas leaks.
WARNING! PRODUCT DAMAGE
• DO NOT FORCE THE DOOR CLOSED with the tube pressed inside the door.
Doing so may damage the door or the exhaust tube and mis-align the sail switch.
WARNING!
It is necessary to use only an applicable Girard Water Heater Door (part numbers:
1GWHD, 1GWHDA6, 1GWHDAS10) with a Girard GSWH-1M Water Heater. Use of any
other brand of water heater door will affect the operation and performance of the Girard
Water Heater and may cause a hazardous condition.

10Page
WARNING! CAUTION!
• 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 Electrical Code,
ANSI/NFPA 70 and/or the CSA C22.1,
Canadian Electrical Code.
Figure 6
This completes the installation of the Model GSWH-1M water heater.
Insert exhaust tube
through door opening
CONSUMER SAFETY WARNING
• 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 lled by a qualied gas supplier only.
• Should overheating occur, turn gas OFF at the LP tank and turn the operating
switch to the OFF position.
OPERATING INSTRUCTIONS

Understanding How the Girard Tankless Water System Works
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 Gas system capable of supplying its rated BTU requirement.
The Girard Products model GSWH-1M is a new ‘induced-draft’, tankless water heater
designed specically for Recreation Vehicles (RV). Its conguration 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 GSWH-1M is a Gas Modulation Control
(GMC - see Figure 5), which is installed inside the vehicle. Using the GMC, the heating
capacity of the water heater can be manually adjusted from a minimum of 18,000 BTUs to a
maximum of 36,000 BTUs and the incoming water temperature will rise 20°- 70° (F) based
on the actual Hot water ow and the Gas Modulation Control (GMC) setting.
The Girard Tankless Water Heater heats water while it is being used i.e., on demand. The output
temperature of the water depends on the GMC setting, the inlet water temperature AND the Hot
water ow.
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IMPORTANT!
• The presence of a ow 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.
• Purge air out of ALL hot and cold water lines, including outside shower, toilet
and wash machine water lines (if applicable).
“LIMITING” Emergency Cut Off (ECO)
If the water ow is low or reduced and the Gas Modulator Control (GMC) Dial is set
too high, “LIMITING” may occur which is: The Hot water temperature will exceed the
Emergency Cut-Off (ECO) setting of 131 degrees (F) and the burner will shut off. When
the Hot water outlet temperature drops to approximately 110 degrees (F) the burner
will reignite. The End User will experience the Water Heater cycling from Hot water then
Cooler water. To correct this “Limiting/cycling” the Gas Modulation Control (GMC) Dial
needs to be turned counter clockwise and/or increase the Hot Water ow.
IF “LIMITING” OCCURS, TURN THE GAS MODULATION CONTROL (GMC) DIAL
COUNTER CLOCKWISE AND/OR INCREASE THE HOT WATER FLOW.

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F. User operation of the GSWH-1M
Since an RV’s environment and water source (temperature, flow/pressure) can
change on a daily basis and the Girard GSWH-1M Tankless Water Heater needs to
make “instant” Hot water based on these changes, Girard Products has designed
the Girard GSWH-1M Tankless Water Heater with multiple operation controls and
settings so the end user can achieve the desired Hot water temperature in nearly any
environment.
This is accomplished by: (a) adjusting the Gas Modulating Control Dial (GMC), (b) by
adjusting the Hot water flow and/or (c) by adding Cold Water to the Hot Water flow.
We suggest, before going on their first camping trip, the end user try the different
operating procedures (at every faucet) to acheive the desired Hot water temperature.
OPERATING PROCEDURES:
1. Purge the air out of all Cold and Hot Water Lines (don’t forget any outside faucets, toilet and
washer hook-ups). This only needs to be done on the rst time out camping (unless a water
line is depleted of water).
2. Open Water Heater Door and turn the Water Heater Power switch to the ON position. The
Power Switch can be left in the ON position for the entire camping season since it will only
draw power when there is a demand for Hot water.
3. Locate and set Gas Modulator Dial (GMC) to the appropriate setting (see g.5 on page 8).
a. Normal Weather – Set Dial to the middle area.
b. Extreme Cold Weather – Set Dial to the extreme right area (large ame).
c. Extreme Hot Weather – Set dial to the extreme left area (small ame).
4. Turn on the Hot water faucet to a normal ow rate (normal would be ½ to 2/3 ow rate). Wait
for the water to travel from the Water Heater to the faucet (this may be a few seconds to
nearly a minute, depending on the RVs plumbing conguration and location of the faucet and
the Water Heater).
5. If the Hot water is not Hot enough you may do the following:
a. Turn the Gas Modulating Dial “clockwise” to increase the ame/BTUs to raise the
Hot Water Temperature. NOTE: Use caution not to increase the Dial too much which
could cause the Hot Water temperature to rise to the point the Water Heater “limits”
and turns OFF the ame (ame shut off is approximately 131 degrees F).
b. Reduce the Hot water ow to increase the Hot water temperature
6. If the Hot Water is too Hot you may decrease the Hot water temperature by:
a. Turn the Gas Modulator Dial counter-clockwise to decrease the ame/BTUs.
b. Increasing the Hot Water ow.
c. Gradually add Cold water.
NOTE: Adding Cold water to may cause the Water Heater to “limit” if the Hot Water temperature
approaches the 131 degree (F) range which may happen if the Hot water flow decreases to
below 1 Gallon per Minute (GPM).

WINTERIZATION
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 ll the system with a non-toxic anti-freeze. Make sure that the anti-freeze ows from each
tap to complete the process.
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WINTER USE DEVICE (WUD)
If you wish to operate the water heater in potentially freezing conditions the
model GSWH-1M has a built in thermostat that will start the burner whenever the
temperature of the Heat Exchanger falls below 38ºF and will automatically shut off
when it senses a temperature in excess of 58 ºF.
IMPORTANT:
To allow the WUD device to operate you must have sufcient LP Gas in the tank
and you must leave the unit powered with the ON / OFF switch in the ON position
at all times that freezing may occur. It will not protect the entire RV’s plumbing
system. The RV must be designed for winter use/freezing conditions.
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 Gas Shutoff Devices for Hot Water Systems, ANSI
Z21.22.
THIS VALVE IS A SAFETY COMPONENT AND MUST NOT BE REMOVED FOR ANY REASON
OTHER THAN REPLACEMENT.
WARNING – SCALDING INJURY-EXPLOSION
• 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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WHEN REPLACING THE PRESSURE – TEMPERATURE RELIEF VALVE
• DO NOT install anything less than a combination pressure–temperature relief valve certied
by a nationally recognized testing laboratory that conducts periodic inspections of such
products and certies them as meeting the requirements for Relief Valves and Automatic Gas
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
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 Girard Products or an authorized Service
Center for any questions regarding the proper operation of the water heater. The model GSWH-
1M 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>131°F)
1.4. P/T Valve: to provide pressure relief in case of overheating
2. Gas Sub-System
2.1. Gas Control Regulator.
2.2. Gas Modulator Valve
2.3. Burner (Blade type; high efciency)
3. Flue Sub-System
3.1. Flue Collector
3.2. Exhaust Blower
3.3. Flue outlet
4. Electrical 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 ow at the exhaust.
4.7. Gas Modulator Control (GMC) connection wire
In the following pages we present:
1. Figure 9: Shows an exploded view of the GSWH-1M water heater with identication 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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Figure 8
Flame
sight
hole
Flame at top of burner
MAINTENANCE
Routine Maintenance
We recommend that the GSWH-1M water heater be inspected monthly by the user and at least
once a year by a Girard Products LLC recommended service technician.
Before an inspection, make sure that the LP Gas and Water systems are turned on. Purge air out
of ALL hot and cold water lines.
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 ow.
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, Gas and electrical connections.
6. There is a screen on the Water Heater inlet water line connection, unscrew the water line
connection from water inlet and check the screen to ensure no debris.
7. Check that all wire connections are rmly in place and there are no signs of chang 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.
8. 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 FLOWING FROM THE HOT WATER OUTLET IS COLD.
9. Turn on the power to the water heater and
open a hot water faucet to inspect
the ame of the burner. The ame should
be of the normal bluish appearance
that indicates proper combustion. This can
be accomplished by observing the
ames through the sight hole and looking
at the burner under the edge of the
heat exchanger (See 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. Verication that no ame is present
3. Verication that the Sail Switch is open
4. Turn on the Blower
5. Upon detection of combustion air ow,
starts the ignition routine by opening the
gas valve and supplying the rst 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 Gas ignition to occur
or immediately shuts down the ame by
interrupting the gas ow to the burner. The
failures detected by the Control Board are:
Failure to light
If the burner fails to light, or if ame is not
detected during the rst 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 ve minute delay. (Lockout
Condition)
Recovery from ‘lockout’ requires a manual
reset by either resetting the thermostatic
demand (turning off the water ow) or turning
off the power for a period of 5 seconds and
then opening the HOT Water Faucet.
Flame failure
If the established ame 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 ame is re-established, normal
operation resumes.
Combustion airow problems
If the airow signal is lost, or the hi-limit switch
(See Notice Page 11) 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 ve 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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Figure 10 - WIRING DIAGRAM
Figure 9 - EXPLODED VIEW OF MODEL GSWH-1M AND MAJOR COMPONENTS IDENTIFICATION

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BTU/HR 18,000 - 36,000
Fuel Propane (LP Gas)
Inlet Pressure 11” WCI Min to 14” WCI Max
Manifold Pressure 10” – 10.5” WCI
Power Input 12VDC < 3 amp
Water Operating Pressure 125 PSI Max
Dimension Width: 12.5” - Height: 12.5” - Depth 15.5”
Shipping Weight 22 lbs.
ECO max Temperature 131°F
Specications
The table below summarizes the main performance specications of the Model GSWH-1M.
Figure 11

Girard 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. Girard 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 Girard 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, Girard Products will replace any parts that
are found defective and will pay a warranty service allowance directly to the recommended Girard
Products Water Heater Service Center at rates mutually agreed upon between Girard 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, conrm that the service center is a recommended
service center for Girard Products, LLC Water Heaters. DO NOT PAY THE SERVICE CENTER FOR
WARRANTY REPAIRS WITHOUT PRIOR APPROVAL FROM GIRARD PRODUCTS, LLC; SUCH
PAYMENTS WILL NOT BE REIMBURSED.
5. The defective parts (or water heater) become the property of Girard Products, LLC and may need
to be returned to Girard Products Technical Support Department. Girard 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 classied as normal maintenance:
• Adjustment of gas pressure
• Cleaning or adjustment of ue
• Adjustment of pressure-temperature relief valve
• Cleaning, replacement, and adjustment of burner orice
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, modications, water damage or freezing.
10. THIS WARRANTY AND THE REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN
LIEU OF ALL OTHER WARRANTIES, REMEDIES AND CONDITIONS, WHETHER ORAL OR
WRITTEN, EXPRESS OR IMPLIED. GIRARD PRODUCTS LLC SPECIFICALLY DISCLAIMS ANY
AND ALL IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF
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GIRARD PRODUCTS, LLC GSWH-1M WATER HEATER TWO YEAR LIMITED WARRANTY

20Page
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
IF GIRARD PRODUCTS LLC CANNOT LAWFULLY DISCLAIM IMPLIED WARRANTIES
UNDER THE LIMITED WARRANTY, ALL SUCH WARRANTIES, INCLUDING WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED IN
DURATION TO THE DURATION OF THIS WARRANTY.
NO RESELLER, AGENT, OR EMPLOYEE IS AUTHORIZED TO MAKE ANY MODIFICATION,
EXTENSION OR ADDITION TO THIS WARRANTY. GIRARD PRODUCTS LLC IS NOT
RESPONSIBLE FOR DIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING FROM ANY BREACH OF WARRANTY OR CONDITION, OR UNDER ANY
OTHER LEGAL THEORY, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DOWNTIME,
INCONVENIENCE, GOODWILL, EXPENSES FOR TRAVEL, LODGING, DAMAGE TO OR
REPLACEMENT OF EQUIPMENT AND PROPERTY.
11. Some states and provinces do not allow the exclusion or limitation of incidental or
consequential damages or exclusion or limitations on the duration of implied warranties or
conditions, so the above limitations or exclusions may not apply to you. This warranty gives you
specic legal rights, and you may also have other rights that vary by state or province.
12. Replacement parts purchased outside of the original water heater warranty carry a 90 day
limited warranty.
13. Girard Products provides no warranty for products installed or warranty claims originating
outside the continental United States, Alaska, Hawaii and Canada.
Service
Your Girard Tankless Water Heater is manufactured to the highest standards and is designed
to provide years of trouble free use but in the event you require service please follow the steps
outlined below. Remember as an owner, you are required to provide proof of purchase date
through a Bill of Sale or other appropriate record.
1. If your RV has its original water heater and is still under the RV manufacturer’s warranty,
follow the steps suggested by your dealer or the manufacturer of your RV.
2. Contact Girard Products Water Heater Service Center or call the Girard Products Technical
Support Department at 949-259-4024 or visit our website at www.greenrvproducts.com for a
local recommended service center.
3. Call the service center, describe your problem and make an appointment, if necessary.
SERVICE CALLS TO CUSTOMER LOCATION ARE THE RESPONSIBILIY OF THE OWNER. DO
NOT PAY THE SERVICE CENTER FOR WARRANTY REPAIRS WITHOUT PRIOR APPROVAL
FROM GIRARD PRODUCTS, LLC; SUCH PAYMENTS WILL NOT BE REIMBURSED. Be sure to
provide purchase documentation regarding your Girard Water Heater.
This Girard Products Water Heater is designed for use in recreation vehicles for the
purpose of heating water as stated in the “rating plate” attached to the water heater.
Any other use, unless authorized in writing by the Girard Products Engineering
Department, voids this warranty.
GIRARD PRODUCTS, LLC
1361 CALLE AVANZADO, SAN CLEMENTE, CA 92673
949-259-4024 • www.greenrvproducts.com
WARRANTY/GSWH-1M (2/8/2012)