Girard Products WUD User manual

Owner’s Manual
Winter Use Device:
W U D
For use only with GSWH-1
Helps Protect the GSWH-1 from
Freezing Temperatures that may
cause damage to the unit.
• Installation
• Operation
• Service and Maintenance
Installation and service must be
performed by a certified installer or
service agency.
The WUD is certified for use with the
Girard Tankless Water Heater System
in RV’s constructed for use where
freezing temperatures are likel y .
C AUTION:
Read and Follow
all the Safety Rules
and Instructions.
Girard Products LLC , 1361 Calle Avanazado, San Clemente CA 92673 U.S.A
Owner’s Manual Part No.1GWH9403
Patent Pending
P a g e 1

P
a
g
e
2
Winter Use Device - WUD
Installer/Customer Responsibilities
• Read and observe all safety rules
• Keep these instructions and warranty for future reference
• If this device is purchased as an aftermarket item. Installation and Ser vice
must be performed b y a certified installer or ser vice a gency .
• Do not attempt installation as a Do-it-Yourself project
• Follow all applicable State and Local Codes
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 fire or explosion
may result causing property damage, personal injury or death .
• Do not store or use gasoline or other flammable va pors 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 genera tor .
• Evacuate all persons from the vehicle.
• Shut off the gas supply at the gas container or source.
• Contact the nearest certified service technician or gas supplier for repairs.
• If you cannot reach a certified service technician or gas supplier, contact the
nearest fire department.
• DO NOT turn on the gas supply until the gas leak(s) has been repaired.
• Installation and service must be performed by a qualified installer or service agency.

P
a
g
e
3
WARNING! PRODUCT DAMAGE
• Freezing of the internal pipes and Heat Exchanger of the Model GSWH-1 wa ter heater will result
in severe damage not covered b y warranty . For this reason it is not advisable to use the GSWH-1
in the winter unless the RV is manufactured f or use in the winter and equipped with the Winter
Use Device. Consult your OEM and or dealer for additional inf ormation.
CRITICAL INSTALLATION W ARNINGS
• Installation and ser vice must be performed b y a qualified installer or ser vice a gency .
This product is not designed for Do-it-Yourself Installation.
• Install ONL Y in recrea tion vehicles (RV’ s) tha t are manufactured and properl y insula ted f or
use in areas where the risk of freezing temperatures are likel y . RV’ s are recrea tion vehicles
designed as temporar y living quarters f or recrea tion, camping, or tra vel use ha ving their
own power or towed by another vehicle. This Winter Use Device is NOT designed for use
with any other appliance or product.
•
DO NOT modify the Winter Use Device in any way. This is dangerous and will void the warranty.
USA AND CANADA - FOLLOW ALL APPLICABLE STATE AND LOCAL CODES
IN THE ABSENCE OF LOCAL CODES OR REGULATIONS REFER TO CURRENT
STANDARDS OF:
• Recreational V ehicles ANSI A119.2/NFP A 501C.
• CSA standard Z240 RV Series, Recreational V ehicle.
• Park Trailers A119.5
• National Fuel Gas Code ANSI Z223.1 and/or CAN/CGA B149 Installation Codes
• Federal Mobile Home Construction & Safety Standard, T itle 24 CFR, part 3280, or
when this Standard is not a pplicable, the Standard f or Manufactured Home Installations
(Manufactured Home Sites, Communities and Set-Ups), ANSI A255.1 and/or CAN/
CSA-Z240 MHSeries, Mobile Homes.
• National Electrical Code ANSI/NFPA No. 70 and/or CSA C22.1

P
a
g
e
4
IMPOR TANT!
• For proper opera tion, the GSWH-1 wa ter heater requires a minimum wa ter flow of 1.0 Gallon
per Minute (gpm) for each Hot Water faucet it supplies.
WINTER USE DEVICE (WUD)
Description
Girard Products LLC of fers a Winter Use Device ( WUD - P art# 1GWHAF ) as an option f or use with
the GSWH-1.The Winter Use Device helps protect the GSWH-1 water heater when freezing conditions
are likely to occur by automatically activating the GSWH-1 for a short period of time. This is know as
the Anti-Freezing Mode.
Anti-freezing Mode
T o prevent freezing of the wa ter in the wa ter heater itself, the WUD utilizes a Thermostat and a
12VDC solenoid valve to create a demand for hot water whenever the ambient temperature falls
below 38°F. This will cause the unit to automatically light for a short period of time IF the GSWH-1
SWITCH is set to the ‘ON’ position, the system is POWERED with 12VDC (the PUMP must be ON ),
GAS is available and FRESH WATER from the holding tank is provided to the water heater. Upon
reaching a temperature of approximately 50° F the unit will automatically shut off and return to a
stand by condition.
IMPOR TANT!
• The Anti-freezing Mode function of the WUD is designed to prevent onl y the wa ter in the
GSWH-1 internal water heater pipes from freezing, NOT the entire plumbing system of the RV .
IMPOR TANT!
The Winter Use Device will work only when:
• The RV can provide a sufficient supply of fresh water.
• The water heater is adequately powered with 12VDC and switched ON .
• The RV Water pump is switched ON and is working properl y .
• There is sufficient LP Gas in the LP tank f or the wa ter heater to operate and the gas system is
turned ON .

5
IMPOR TANT!
• The Winter Use Device warranty is conditional on proper use. Provided tha t all the a bove
conditions are met, an y a pplicable warranty replacement and/or repairs are limited to
the Girard T ankless W a ter Hea ter system and no other part of the plumbing or other RV
subsystems.
• All models of the Girard GSWH-1 Tankless Water Heater (with or without the Winter Use
Device ) must be winterized if the RV is not in use and/or in storage.
C. Components
The WUD device consists of two components:
1) a Thermostat and
2) a Solenoid
1. Thermostat
A thermosta t mounted on the Heat Exchanger of the wa ter heater (Figure 1) and connected internall y
to the 12VDC power. The power connection is made after the Power ON/OFF switch located on
the GSW-1; NOTE: power is NOT supplied unless the switch is in the ON position.
.
Figure 1
The output of the thermostat is provided at the electrical connections on the
back of the water heater (Orange wire) to provide power to the Solenoid valve
as needed (Figure 2).

6
Figure 2
2. Solenoid V alve .
The Solenoid V alve may be located in either of two locations: Option 1: attached to the Hot Wa ter
Outlet on the back of the Water Heater (recommended) and plumbed both to the Hot Water System
AND the fresh wa ter tank; or Option 2 : somewhere between the W a ter Hea ter and the Fresh
Water Tank and plumbed to the system and the fresh water tank. Regardless of location, it must
be plumped properly to function correctly. Consult your OEM for the location if installed at time of
production.
Note: In certain aftermarket installations access to the fresh water tank may not be possible. The solenoid out water line can
be connected to a drain or routed to the ground but be aware that a patch of ice may form under the RV which may cause a
hazardous condition.
CRITICAL INSTALLATION W ARNING!
• The Solenoid V alve must be loca ted where it is easil y accessible should ser vice be required.
Girard will not be responsible for labor charges to locate and make accessible.

7
Figure 3
PEX tubing and connector may be used for the installation of the Solenoid V alve.
INSTALLATION, OPERATION, MAINTENANCE AND SERVICE
WARNING! PRODUCT DAMAGE!
• Freezing of the internal pipes and Heat Exchanger of the Model GSWH-1 wa ter heater will
result in severe damage not covered b y warranty . For this reason it is not advisable to use the
unit in the winter unless the RV is manufactured f or use in the winter and equipped with this
option. Consult your OEM for additional inf ormation.
WARNING! C AUTION!
• Improper installation, adjustment, altera tion, ser vice or maintenance can cause property
damage, personal injur y or loss of life
• Installation and service must be performed by a qualified installer, service agency
• This product is NOT designed nor intended for Do-it-Yourself Installation.

8
INST ALLATION
CRITICAL INSTALLATION W ARNINGS!
• Installation and ser vice must be performed b y a qualified installer or ser vice a gency . This
product is not designed for Do-it-Yourself Installation.
• Install ONL Y in recrea tion vehicles (RV’ s) tha t are manufactured and insula ted f or use in
areas where the risk of freezing temperatures is likel y . RV’ s are recrea tion vehicles designed
as temporar y living quarters f or recrea tion, camping, or tra vel use ha ving their own power or
towed by another vehicle. The Winter Use Device is NOT designed for any use with any other
appliance or product.
• DO NOT modify the Winter Use Device in any way. This is dangerous and will void the warranty.
The following instructions apply to the most common type of installation for Girard Products Winter
Use Device. Consult with Girard Products, LLC technical support or engineering department if you
have any additional questions regarding your specific installation/application.
Plumbing Installations
CRITICAL INSTALLATION W ARNINGS!
• The Solenoid V alve must be loca ted where it is easil y accessible should ser vice be
required. Girard will not be responsible for labor charges to locate and make accessible.
1. Select a suita ble location (Figure 5.) to install the Solenoid V alve, close to the GSWH-1 and to 12V
power wires.
2. Locate the HOT water line closest to this loca tion.
3. Insert a Tee in the line and connect a hot water line extension to the selected location.
4. Insert a T ee to the fresh water tank and connect the “OUT” port of the Solenoid V alve to the side
port.
5. Connect the hot water line extension to the “IN” port of the Solenoid V alve.
6. Check for leaks
Note: In certain aftermarket installations access to the fresh water tank ma y not be possible. The solenoid out water line
can be connected to a drain or routed to the ground but be a ware that a patch of ice ma y f orm under the RV which ma y
cause a hazardous condition.

9
B. Electrical
The wiring of the solenoid valve may be carried out with either 16AWG or 18AWG wires. Simply
bring an extension of the orange wire from the Water heater to the location of the Solenoi d Valve
and connect to the RED wire on the Solenoid Valve. The current draw of the valve at 12 VDC is
less than 350mA.
- 12V or Mode SW
Cold Hot
Hl-lo Gromd
Row SWitch
w u o
Heat Exchanger
ECO
Gas Valve
12VDC (Red)
- -12VDC Ground ( Black )
-- Ground (Green)
- Gas Valve (Brown)
••••••• LED (Diagnostics)
•u•••• 12VDC Row I Limi t I Air
Figure 10

10
Operation
Anti-freezing Mode
The operation of the Anti-Freezing Mode in the Winter Use Device (WUD) is TOTALLY
AUTOMATIC , IF the GSWH-1 SWITCH is set to the ‘ ON ’ position,the system is POWERED with
12VDC (the PUMP must be ON ), GAS is available i.e., turned ON , and FRESH WATER from the
holding tank is provided to the water heater. Whenever the temperature of the thermostat mounted on
the Heat Exchanger reaches a temperature of 38°F, the thermostat will close and the Solenoid valve
powered through the Orange wire will open. This creates a demand for water which will cause the
Water Heater to start. The Water Heater will operate until the thermostat reaches a temperature over
50 °F when it will open, causing the Solenoid V alve to close and the Water Heater to shut off. T ypicall y
the Water Heater will run for approximately 45 seconds.
NOTICE!
• The RV can provide a sufficient supply of fresh water.
• The water heater is adequately powered with 12VDC; and switched ON .
• The RV Water pump is switched ON and is working properl y .
• There is sufficient LP Gas in the LP tank f or the wa ter heater to operate and the gas system is
turned ON.
Maintenance
Nospecial maintenance of the WUD components is required.
If you wish to add the Winter Use Device to your unit (Part#1GWH) please consult with
your RV manufacturer to ensure your RV is properly insulated and designed for winter use.
Girard Products Winter Use Device warranty is conditional on proper use. Provided that
all the conditions above are met, any applicable warranty replacement and/or repairs are
limited to the Girard Tankless Water Heater and no other part of the plumbing or other RV
subsystem.
All models of the Girard T ankless W a ter Hea ter (with or without the Winter Use Device must be
winterized if the RV is not in use and/or in stora ge).