INSTALLATION AND OPERATING INSTRUCTION MANUAL LAARS

INSTALLATION AND OPERATING INSTRUCTION MANUAL LAARS
LAARS EverHot®
Doc. 11044
EVERHOT® TANKLESS GAS WATER HEATER
FOR EXTERIOR INSTALLATION
IGE-199R AND IGE-199C MODEL SERIES
WARNING: If the information in
these instructions is not followed
exactly, 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
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas
supplier, call the fire department.
-
Installation and service must be
performed by a qualified installer,
service agency or gas supplier
INSTALLATION AND OPERATING INSTRUCTION MANUAL
PLACE THESE INSTRUCTIONS ADJACENT TO WATER HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE
A Spanish language version of these instructions is available by
contacting the company listed on the rating plate.
La versión espãnola de estas instrucciones se puede obtener al
escribirle a la fábrica cuyo nombre aparece en la placa de
especificaciones.
SECTION I: IMPORTANT INFORMATION
READ CAREFULLY
This gas-fired water heater is design certified by CSA International under the American National
Standard, Z21.10.3 (as indicated on the rating plate) and CAN/CGA 4.3-M (as indicated on the rating
plate) available from CSA Standards Association, 178 Rexdale Blvd., Etobicoke, Ontario, Canada
M9W 1R3.
This water heater must be installed in accordance with local codes. In the absence of local codes, it
must be installed in compliance with the National Fuel Gas Code (ANSI Z223.1-Latest Edition), or in
Canada CAN/CGA B149.1 Natural Gas Installation Code (Latest Edition) or CAN/CGA B149.2
Propane Installation Code (Latest Edition).
The following terms are used throughout this manual to bring attention to the presence of hazards at
various risk levels, or to important information concerning product life.
DANGER
CAUTION
Indicates an imminently
hazardous situation, which, if not
avoided, will result in death,
serious injury or substantial
property damage.
Indicates potentially hazardous
situation, which, if not avoided,
may result in moderate or minor
injury or property damage.
NOTICE
WARNING
Indicates a potentially hazardous
situation, which, if not avoided,
could result in death, serious
injury or substantial property
damage.
Indicates special instructions on
installation, operation or
maintenance, which are
important but not related to
personal injury hazards.
NOTICE
This water heater has a limited warranty. The warranty for this water heater is valid only if the
water heater has been installed, maintained and operated in accordance with these instructions.
TABLE OF CONTENTS
I
II
III
IV
V
VI
IMPORTANT INFORMATION
SPECIFICATIONS
GENERAL INFORMATION
INSTALLATION INSTRUCTIONS
WATER CONNECTIONS
GAS CONNECTIONS
2
5
7
8
11
18
VII
VIII
IX
X
2
ELECTRICAL CONNECTIONS
OPERATING INSTRUCTIONS
TEMPERATURE ADJUSTMENT
MAINTENANCE
PARTS LIST
21
28
30
35
39
DANGER
DO NOT store or use gasoline or other flammable, combustible, or corrosive vapors and/or liquids in
the vicinity of this or any other appliance.
This water heater is for OUTDOOR INSTALLATION ONLY. DO NOT INSTALL INDOORS.
This water heater is equipped with an adjustable thermostat to control water temperature. Hot water
temperatures required for automatic dishwasher and laundry use can cause scald burns resulting in
serious personal injury and/or death. The temperature at which injury occurs varies with the person’s
age and the time of exposure. The slower response time of disabled persons increases the hazards to
them. NEVER allow small children to use a hot water tap, or to draw their own bath water. NEVER
leave a child or disabled person unattended in a bathtub or shower.
WARNING
Improper installation, adjustments, alteration, service or maintenance can cause property damage,
personal injury or loss of life. Failure to follow all instructions in the proper order can cause personal
injury or death. Read and understand all instructions, including all those provided with the appliance
before installing, starting-up, operating, maintaining or servicing this appliance. Keep this manual and
literature in legible condition with this water heater for reference by owner and service technician.
This water heater requires regular maintenance and service to operate safely. Follow the instructions
contained in this manual.
Installation, maintenance, and service must be performed only by a qualified, skilled and
knowledgeable installer or service provider.
Installation is not complete unless a pressure relief valve is installed into the proper location in the
outlet piping of this water heater.
It is the responsibility of the installing contractor to see that all controls are correctly installed and are
properly operating when the installation is complete.
DO NOT operate this water heater without first being certain it is filled with water.
3
WARNING
DO NOT tamper with or alter the water heater and/or controls.
DO NOT operate water heater with jumpered or absent controls or safety devices.
DO NOT operate water heater if any external part has been under water. Immediately call a
qualified service agency to inspect the appliance and to replace any part of the control system
including gas controls, which has been under water.
DO NOT attempt to use this water heater with any gas other than the type listed on the rating
plate. Do not attempt to convert this water heater for use with a gas other than the type for
which it is equipped. Failure to use the proper gas can create an unsafe condition resulting in
property damage, bodily injury, or death. Consult your local gas supplier or gas company if
there are any questions.
DO NOT operate this water heater if the input rate exceeds the rate shown on the water heater
rating plate.
This water heater contains very hot water under high pressure. Do not unscrew any pipe fittings nor
attempt to disconnect any components of this water heater without positively assuring the water is cool
and is not under pressure. Always wear protective clothing and equipment when installing, starting up
or servicing this water heater to prevent scald injuries. Do not rely on the temperature gauges to
determine the temperature. Do not touch any components unless they are cool.
Water heater materials of construction, products of combustion and the fuel contain carbon monoxide,
nitrogen oxides, aldehydes and/or other toxic or harmful substances which can cause death or serious
injury and which are known to the state of California to cause cancer, birth defects and other
reproductive harm. Always use proper safety clothing, respirators and equipment when servicing or
working nearby this water heater.
WARNING
Liquefied petroleum gases/propane gas is heavier than air and will remain at floor level if there is a
leak. Basements, crawl spaces, closets and areas below ground level will serve as pockets for
accumulation of leaking gas. Before lighting, smell all around the appliance area for gas. Be sure to
smell next to the floor.
IF YOU SMELL GAS:
• DO NOT try to light any appliance.
• DO NOT touch any electric switch; do not use any telephone in your building.
• Immediately call your gas supplier from a telephone in another building. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE THE APPLIANCE UNTIL THE LEAKAGE IS CORRECTED!
WARNING
Flammable items, pressurized containers or any other potential fire hazardous articles must never be
placed on or adjacent to the water heater. Open containers of flammable material must not be stored
or used in the same room with this water heater.
DO NOT USE AN INSULATION BLANKET WITH THIS WATER HEATER. This water heater
meets or exceeds the ASHRAE/IES 90.1b (latest edition) standards with respect to insulation and
standby loss requirements.
4
SECTION II: SPECIFICATIONS
Max. Flow Rate @ Degree Temperature Rise
Model No.
IGE-199R-10N
IGE-199R-10X
IGE-199C-5N
IGE-199C-5X
Max.
Input
Rating
Btu/hr.
199,000
Min.
Input
Rating
Btu/hr.
15,000
Temp Rise
40°F
60°F
80°F
100°F
120°F
140°F
Flow Rate
Gal/Min.
7.3
5.9
4.2
3.3
2.8
2.4
First Hour
Supply
Gal/Hr.
438
354
252
198
168
144
Max. Flow Rate @ Degree Temperature Rise
Model No.
IGE-199R-10N
IGE-199R-10X
IGE-199C-5N
IGE-199C-5X
Max.
Input
Rating
kW/hr.
58.3
Min.
Input
Rating
kW/hr.
4.4
Temp Rise
22°C
33°C
44°C
56°C
67°C
78°C
Flow Rate
Liters/
Min.
27.6
22.3
15.9
12.5
10.6
9.1
First Hour
Supply
Liters/Hr.
1656
1338
954
750
636
545
Flow Rate vs Temperature Rise Curve for EVERHOT® IGE model series
9
Max. Flow (gpm)*
8
7
6
5
4
3
2
1
0
0
25
50
75
100
125
150
ΔT – Temperature Rise (°F)
*Note: The maximum flow is based upon a minimum water pressure of 30 PSI
5
EVERHOT® IGE Model Series Dimensions
Dimensions (Inches)
Clearances from Combustible
Materials:
Maximum/Minimum Gas Input
Rating, Btu/hr.
Thermal Efficiency Rating
Minimum/Maximum Gas Supply
Pressures:
Manifold Gas Pressure
Venting System
Setpoint Temperature (Without
remote temperature control)
Temperature setting range with
included Remote Temperature
Control
Recommended Minimum water
supply pressure
Maximum Water Supply
Pressure
Electrical Rating
Electrical Consumption
Ignition System
Water Flow Control
Weight
Height:
Width:
Depth:
23 5/8”
13 3⁄4”
8 7/8”
(60.0 cm)
(34.9 cm)
(22.6 cm)
Top of water heater: 12” (30.5 cm), Front: 24” (61 cm), Sides: 6”
(15.2 cm), Back: 0”, Ground: 12 (30.5 cm)”
199,000 maximum / 15,000 minimum for both Natural and L.P.
Gases.
84%
Natural Gas: Minimum: 6.0” w.c., Maximum: 10.5” w.c.
Propane Gas: Minimum: 10.0” w.c., Maximum: 13.5” w.c.
Natural Gas: 3.4” w.c. Maximum input, 0.6” Minimum input
L.P. Gas: 5.1” w.c. Maximum input, 0.9” Minimum input
Forced Combustion, external vent, For Outdoor Installation Only.
140°F Commercial models, 120°F Residential models
98-160°F, Residential models, 98-185°F Commercial models with
digital remote temperature control installed
20 PSI (50-80 PSI for maximum performance)
150 PSI
120 volts, 60 Hz,
Normal operation: 63 watts, Anti-frost protection (when required):
84 watts
Direct Spark Ignition
Water flow sensor, microprocessor controlled water flow solenoid,
bypass solenoid
46 Lbs. (20.9 kg)
6
SECTION III: GENERAL INFORMATION
FEATURES
The LAARS EVERHOT® IGE series tankless water heater is a high output, high efficiency
appliance, which heats the water continuously as hot water is being drawn for use. Unlike tank type
storage water heaters, this water heater does not store hot water. The burner operates whenever there is
a demand for hot water and is off when the water flow stops. Hot water is continuously supplied for any
length of time required, as long as the specified flow rates are not exceeded. There is no need to set the
temperature higher than required for sufficient capacity. The EVERHOT water heater has sufficient
capacity to supply several hot water faucets simultaneously. The hot water flow capability will be
dependent upon the temperature of the outlet water selected. More detail can be found under the
“Temperature Adjustment” section of this Installation and Operating Instruction Manual. Your plumbing
professional should determine your hot water requirements before installing this water heater to be sure
the capacity is sufficient for your application.
•
The IGE series water heaters are designed to be installed outdoors on an outside wall. The
water heater is compact (23 5/8” (60 cm) H x 13 3/4” (34.9 cm) W x 8 7/8” (22.6 cm) D) and
mounts on an outside wall using the supplied wall bracket. No indoor space is needed and the
water heater can be mounted at a height convenient for servicing.
•
The weight is less than 50 pounds (23 kg) and can be installed by 1 person.
•
The burners ignite within 3 seconds of water flow (1/2 gallon/minute (1.9 L/m) minimum) by direct
spark ignition. There is no standing pilot.
•
A variable speed combustion air blower forces the combustion air supply into the burner
compartment.
•
No venting system required. For outdoor installation only.
•
An optional recess box is available which allows the water heater to be recessed into an outside
wall and conceal the piping behind a cover for a more attractive installation. The box enclosure
dimensions are: 40 1⁄2” H x 14 3⁄4” W x 9 1⁄2” D. Contact your Laars supplier to order this
optional accessory.
•
The burner flame is continuously monitored and modulated to match the heating requirements of
the water flow. Temperature and flow sensors continually monitor the water flow and outlet water
temperature and adjust the burner and combustion air blower to maintain temperature.
•
The included, remotely mounted Main Control may be conveniently located near the point of use
and is adjustable from 98-160°F for residential models (IGE-199R series), or 98-185°F for
commercial models (IGE-199C series). In addition to the Main Control, up to two optional
controls are available for setting the temperature in the bathroom fixtures or other remote
locations.
•
All the controls also display fault codes if the water heater malfunctions to assist with servicing
the water heater.
•
The heat exchanger coil is provided with anti-freeze heaters for cold climate conditions for
protection as low as -30°F (-34°C). Solenoids should be installed to drain the water heater in the
event of a power failure.
•
The water heater is very quiet in operation.
7
SECTION IV: INSTALLATION INSTRUCTIONS
WARNING
INSTALLATION OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO
THAT OF A LICENSED PLUMBER. PLUMBING, AIR SUPPLY, VENTING, GAS
SUPPLY AND ELECTRICAL WORK ARE REQUIRED.
DO NOT ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE NOT CERTAIN OF
THE FOLLOWING:
• Liquefied petroleum gases/propane gas and natural gas have an odorant added by
the gas supplier that aids in detection of the gas.
• Most people recognize this odor as a “sulfur” or “rotten egg” smell.
• Other conditions, such as “odorant fade” can cause the odorant to diminish in
intensity, or “fade”, and not be as readily detectable.
• If you have a diminished sense of smell, or are in any way unsure of the presence
of gas, immediately contact your gas supplier from a telephone in another building.
• Gas detectors are available. Contact your gas supplier or plumbing professional for
more information.
Liquefied petroleum gases/propane gas is heavier than air and will remain at floor level if
there is a leak. Basements, crawl spaces, closets and areas below ground level will serve
as pockets for accumulation of leaking gas. Before lighting, smell all around the appliance
area for gas. Be sure to smell next to the floor.
IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any telephone in your building.
• Immediately call your gas supplier from a telephone in another building. Follow the
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE THE APPLIANCE UNTIL THE LEAKAGE IS CORRECTED!
WARNING
This water heater must be located in an area where leakage of the heat exchanger coil,
water line connections, or the pressure relief valve will not result in damage to the area
adjacent to the water heater or the outside building structure.
8
WARNING
•
•
•
This water heater is suitable for potable water heating only. DO NOT use this
water heater for space heating
or combination space heating/domestic water
WARNING
heating.
This water heater is not suitable for use in pool or spa applications.
The water heater must be installed outdoors. Failure to properly install this
water heater outdoors may result in property damage, personal injury, or
death. Refer to the installation of the water heater in this installation and
instruction manual for details on the location and installation outdoors. DO
NOT INSTALL INDOORS.
WARNING
Pressure relief valve discharge piping must be piped near the ground or drain to eliminate
potential of severe burns. Insulate and use electrical heat tape around the discharge drain
pipe in any area where freezing could occur. Do not install any shut-off valves, plugs or caps
to the pressure relief valve or discharge piping.
CAUTION
If building cold water supply has a back-flow preventer, check valve or water meter with check
valve, provisions for thermal expansion of water in the hot water system must be provided.
DANGER
Temperature setting should not exceed safe temperature at fixtures. See water temperature
control warnings in the “Temperature Adjustment Section” of this Installation and Operating
Instruction Manual. If higher preheat temperatures are necessary to obtain adequate booster
output, add an ASSE approved mixing valve for hot water supplied to fixtures.
UNPACKING
INSPECT SHIPMENT carefully for any signs of damage.
1. All equipment is carefully manufactured, inspected and packed.
2.
Any claims for damage or shortage in shipment must be filed immediately with the shipping
company and noted on the Bill of Lading.
WATER HEATER LOCATION:
1. The IGE series water heaters must be installed outdoors. Refer to figure 1 and table 1 (Section
IV) in this Installation and Instruction Manual for minimum installation clearances before choosing
a final location for the water heater.
2. The water heater must be installed on a wall capable of supporting at least 50 pounds (23 Kg).
Locate the water heater at a height convenient for servicing and above the reach of small
children.
3. Minimum clearance to combustible material is 12” (30.5 cm) from the Top, 24” (61 cm) from the
Front, 0” from the Rear, 6” (15.2 cm) from the Sides, and 12” (30.5 cm) from the Bottom of this
water heater. An optional recess box is available for installing the water heater recessed in an
outside wall and enclosing the piping (see features section). When the water heater is installed in
a recess box, the clearances from the top, bottom, sides, and back surfaces of the recess box to
combustible materials are 0”. The clearance from combustibles from the front of the recess box
is 24” (61 cm). Contact your Laars distributor for information on obtaining and installing
the water heater in a recess box.
9
Build Opening Clearances (Fig 1)
Table 1
Minimum Installation Clearances
Reference
Description
A
B
C
D
E
F
Vertically below a window, door which opens, air inlet
Vertically above a window, door which opens, air inlet
Below eaves, porches, or overhangs
Horizontally from a window, door which opens, air inlet
Horizontal distance from another water heater
Vertical distance from another water heater
Minimum Distance
in Inches (cm)
12” (30.5 cm)
12” (30.5 cm)
36” (91.4 cm)
12” (30.5 cm)
2” (5.1 cm)
12 (30.5 cm)
REMOVE CARTON
Move water heater to a location near where it will be installed. Carefully slide water heater out
from the carton and remove all the contents.
MOUNT WATER HEATER ON THE WALL
The EVERHOT® IGE series water heater must be installed outdoors. Refer to Table 1
clearances under overhangs, windows, doors, etc. Also avoid locations where there is heavy
water runoff from roofs. Determine the proper height and location for the water heater to be
installed. Consider the water and gas connections. Allow enough room for servicing the water
heater and maintain the clearances from combustible materials previously stated. The water
heater is supported on the wall by means of a top and bottom slotted angle bracket. For
convenience, the center hole of the bracket is slotted so that a center screw may be first installed
in the wall for hanging the water heater on the wall. Two more screws are then added on the
ends of the bracket to secure the water heater. Wall anchors should be used for the bracket
holes unless the bracket lines up with a stud. As an alternative, a suitable piece of plywood or
2x4 wooden support may be cut to span the wall studs and the brackets. Make sure the anchors
are rated to support the 50 pound (23 kg) weight of the water heater.
10
SECTION V: WATER CONNECTIONS
WARNING
Failure to install and maintain a new, listed pressure relief valve will release the manufacturer from any
claim, which might result from excessive temperature and pressures.
Keep clear of the pressure relief valve discharge line outlet. The discharge may be hot enough to cause
scald injury. The water is under pressure and may splash.
WARNING
DO NOT reverse the inlet and outlet (cold and hot water) connections on the water heater. This may
cause a hazardous operating condition or the water heater may be inoperable
WATER QUALITY
The EVERHOT® water heater must have the water quality within the following limits for long life and
reliable operation (see Table 2). The water supply should be tested to make sure the quality is within the
specified limits. If there is a problem with the water quality, contact your local water conditioning company
for equipment to condition the water supply to this appliance.
NOTICE
Operating this water heater with water conditions outside the specified limits will void the warranty.
Description
Levels
pH
6.5 to
8.5
TDS
(Total
Dissolved
Solids)
Up to 500
ppm
Table 2
Total
Hardness
Aluminum
Chlorides
Copper
Iron
Manganese
Zinc
Up to
200 ppm
or 11.7
grains of
hardness
Up to 0.2
ppm
Up to
250 ppm
Up to
1.0 ppm
Up to
0.3
ppm
Up to 0.05
ppm
Up to
5 ppm
Lime Condition Warning Signal:
If the EVERHOT water heater is operated under hard water conditions without a water conditioner, the
error code “LC” may flash on the remote temperature display. This code means the heat exchanger coil
is beginning to accumulate scale deposits and MUST be flushed (see Section IX, “Flushing Procedure for
Lime Scale Removal…”). Contact your installer for a qualified service technician to flush the heat
exchanger. A water conditioner may be needed to prevent this condition from reoccurring.
NOTICE
Failure to flush the appliance when “LC” is flashing will cause damage to the heat exchanger. Damage
caused by lime or scale build up is not covered by the water heater warranty.
INSTRUCTIONS FOR CONNECTIONS
1. BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE MAIN WATER SUPPLY
VALVE. After shutting off the main water supply, open a faucet to relieve the water line pressure
to prevent any water from leaking out of the pipes while making the water connections to the
water heater. The COLD water inlet and HOT water outlet are identified on the bottom casing of
the water heater. Make the proper plumbing connections between the water heater and the
plumbing system to the house. All soldering materials and piping must be compatible with
potable water. Unions should be installed on both the hot and cold water lines for future servicing
and disconnection of the water heater. Install a shut-off valve in the cold water supply line.
11
2. In order to service the water heater in the event the heat exchanger needs to be flushed from lime
deposits, tee fittings with shut off valves and service connections to hoses should be installed.
Also install a shut off valve to the hot water supply to isolate the service tee fittings. A plumbing
installation kit, which includes these fittings and a pressure relief valve, is available from your
supplier. Refer to piping diagrams (fig. 2-5) at the end of Section V.
3. Install a pressure relief valve on a tee connection from the hot water outlet piping from the water
heater. Refer to the piping diagrams (fig. 2-5) and the warning for the Pressure Relief Valve at
the end of Section V on Water Connections.
4. In cold climates where piping can freeze during an extended power failure, drain solenoid valves
should be installed on the cold and hot water supply lines to allow water to drain from the water
heater when power is interrupted. Refer to the piping diagram “Recommended Piping for Power
Failure Freeze Protection” (fig. 3) at the end of this Water Connections Section and contact your
dealer if assistance is needed.
5. If this water heater is installed in a closed water supply system, such as the one having a backflow preventer in the cold water supply, provisions must be made to control thermal expansion.
DO NOT operate this water heater in a closed system without provisions for controlling thermal
expansion. Warranties do not cover damages from thermal expansions such as pressure bulges
and/or deformities. Your water supplier or local plumbing inspector should be contacted on how
to control this situation.
6. Purge the cold water line prior to connecting to the water heater to remove debris. Debris will
clog the mesh strainer of the inlet filter. The inlet strainer prevents debris from damaging the flow
sensor or clogging the coil. It may need to be cleaned periodically and should be cleaned after
the installation. DO NOT operate the water heater without the filter in place.
7. After installation of the water lines, open the main water supply valve and fill the water heater.
While the water heater is filling, open several hot water faucets to allow air to escape from the
water system. When a steady stream of water flows through the faucets, close them and check
all water connections for possible leaks.
8. This water heater may also be connected to a circulating pump or storage tank for increased flow
capacity during high demand periods. Refer to the suggested piping diagrams (fig. 4-5) at the
end of Section V on Water Connections to be used as a guide.
9. Commercial installations may require more than one water heater piped together in a manifold to
supply enough capacity for high temperature and high water flow applications. Special controls
are available from your Laars supplier for operating more than one water heater
together. These controls stage the operation of the water heaters for the flow rates and control
the amount of flow through each water heater. Order part# 239-44511-00 for the electronic
manifold control for the first and second water heater and part# 239-44512-00 for the wiring
harness for each additional water heater to be controlled. Instructions are included with these
parts. Use the piping diagram in figure 5 in Section V as a guide.
NOTICE
Take care when using pipe dope or Teflon tape to avoid clogging the inlet screen and water flow
sensor. Wipe off excess pipe dope from threads before connecting to the water heater.
Commercial dishwashers will require either more than one water heater or a storage tank to supply a
sufficient volume of hot water.
12
Recommended Piping for a Basic Installation
Fig. 2
13
Recommended Piping for Power Failure Freeze Protection
As long as electrical power and gas are supplied to the EVERHOT® water heater, freeze protection is
provided to the heat exchanger and piping inside the water heater with ambient temperatures as cold as
-30°F (-34°C), when protected from direct wind exposure. In the event of a power failure at temperatures
below freezing, the water heater must be drained of all water to prevent freeze damage. The water
heater may be drained manually, or automatically, through the installation of the optional solenoid valves
as shown in the following illustration. The drain solenoids are recommended for very cold climates to
prevent water heater freeze damage where power failures from ice and windstorms occur.
The electrical connections for the two solenoids must be tied to the 120 volt main power supply terminals
provide on the PCB board. When the electrical power to the water heater fails, the 3⁄4” solenoid on the
cold water inlet pipe closes, stopping water flow into the water heater. The 1⁄4” solenoid opens, allowing
the water heater and connected piping to drain. Make sure the piping from the drain solenoid is run to a
suitable drain or outside the building to prevent water damage.
Drain Solenoid Piping (Fig. 3)
CAUTION
All piping located outside the building must be insulated and wrapped with heat tape to prevent freezing.
14
Recommended Piping for a Circulation System
Fig. 4
15
Recommended Piping for Back-up Storage System
For hotels, motels, and other high flow applications
(Fig. 5)
Note: The Primary Circulator for the water heating loop must be sized for 21 GPM @ 35 Ft. Head.
16
PRESSURE RELIEF VALVE
WARNING
Keep clear of the pressure relief valve discharge line outlet. The discharge may be hot
enough to cause scald injury. The water is under pressure and may splash.
For protection against excessive pressure, install pressure protective equipment required by
local codes, but not less than a pressure relief valve certified by a nationally recognized
testing laboratory that maintains periodic inspection of production of listed equipment or
materials as meeting the requirements of the Standard for Relief Valves and Automatic Gas
Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22 and the Standard CAN1-4.4
Temperature, Pressure, Temperature and Pressure Relief Valves and Vacuum Relief Valves.
The pressure relief valve must be marked with a maximum set pressure not to exceed the
maximum working pressure of the water heater. The pressure relief valve rating must not be
less than the hourly rating of the water heater
Install the pressure relief valve into a tee connection from the hot water outlet of the water
heater.
Note: Some models may already be equipped or supplied with an installed pressure relief
valve. Verify that the pressure relief valve complies with local codes. If the pressure relief
valve does not comply with local codes, replace it with one that does. Follow the installation
instructions above on this page
Install a discharge line so that water discharged from the pressure relief valve will exit within
six (6) inches (15.2 cm) above, or any distance below the structural floor and cannot contact
any live electrical part. The discharge line is to be installed to allow for complete drainage of
both the combination temperature and pressure relief valve and the discharge line. The
discharge opening must not be subjected to blockage or freezing. DO NOT thread, plug or
cap the discharge line. It is recommended that a minimum clearance of four (4) inches (10.2
cm) be provided on the side of the water heater for servicing and maintenance of the
pressure relief valve.
Do not place a valve between the pressure relief valve and the hot water outlet!
17
SECTION VI: GAS CONNECTIONS
WARNING
Connect this water heater only to the type of gas as shown on the rating plate. Use clean black iron
pipe or equivalent material approved by local codes and ordinances. (Dirt and scale from the pipe can
enter the gas valve and cause it to malfunction). The inlet gas line must have at least a 3 inch (7.62 cm)
drip leg (sediment trap) installed as close to the water heater’s gas valve as possible. A ground joint
union must be installed in the gas supply line, as close to the water heater as possible, to permit
servicing of the water heater. Compounds used on the threaded joints of the gas piping must be
resistant to the action of liquefied petroleum gases/propane gas. DO NOT apply pipe dope to the gas
valve inlet and make certain that no pipe dope has become lodged in the inlet screen of the gas valve.
Extreme care must be taken to ensure no pipe dope enters the gas valve and to avoid excessive torque
when tightening the gas supply line to the gas valve. Excessive torque may result in cracking of the gas
valve housing. The suggested maximum torque is 31.5 foot lbs. (4.4 kg-m). The manufacturer of this
water heater will not be liable for any damage or injury caused as a result of a cracked gas inlet as a
result of excessive torque.
This water heater and its gas connection must be leak tested before placing the water heater in
operation. Check for gas leaks with a soap and water solution and a brush or a commercial leak
detector fluid.
NEVER USE A MATCH OR OPEN FLAME FOR TESTING!
The water heater is not intended for operation at higher than 10.5 inches water column, for natural gas,
13.5 inches water column for L.P. supply gas pressure. Higher gas supply pressures require
supplemental reducing service regulation. Exposure to higher gas supply pressure may cause damage
to the gas controls, which could result in fire or explosion. If overpressure has occurred such as through
improper testing of gas lines or emergency malfunction of the supply system, the gas valve must be
checked for safe operation. Make sure that the outside vents on the supply regulators and the safety
vent valves are protected against blockage. These are parts of the gas supply system, not the water
heater.
WARNING
Conversion of this unit from natural gas to L.P., or L.P. to natural gas CANNOT be done in the field. If the
gas supply does not match the type shown on the water heater rating plate, then contact your supplier for
the proper water heater for the building gas supply.
CAUTION
The water heater and individual shutoff valve must be disconnected from the gas supply piping system
during any pressure testing of the system at test pressures in excess of 1⁄2 psi (3.5 kPa). The water
heater must be isolated from the gas supply piping system by closing its manual shutoff valve during any
pressure testing of the gas supply system at test pressures equal to or less than 1⁄2 psi (3.5 kPa). The
supply line must be capped when not connected to the water heater.
If copper supply lines are used, they must be internally tinned and certified for gas service.
The gas supply lines must meet all requirements of the National Fuel Gas Code ANSI Z223.1 (Latest
Edition), or in Canada CAN/CGA B149.1 Natural Gas Installation Code (Latest Edition) or CAN/CGA
B149.2 Propane Installation Code (Latest Edition). The gas supply line may need to be larger for the
EVERHOT® water heaters than a storage water heater in the case of a replacement installation. Refer to
the gas piping capacity tables at the end of Section VI (Gas Connections) and in the codes referenced
above.
A 3” (7.6 cm) drip leg (sediment trap) is required ahead of the gas inlet connection to the water heater.
See water heater installation illustration. Install a manual gas shutoff valve before the gas inlet
connection to the water heater before connecting to the gas line. A union should be installed before the
water heater gas connection for disconnection for servicing. Refer to the piping diagrams (Fig. 2-5) in
Section V, “Water Connections”.
18
Check the type of gas and the gas inlet pressure before connecting the EVERHOT water heater to the
gas supply. If the gas supply type does not match the type shown on the water heater rating plate, then
DO NOT connect the water heater. Contact your supplier for the correct water heater.
GAS METER SIZE –NATURAL GAS ONLY
Be sure that the gas meter has sufficient capacity to supply the full rated gas input of the water heater as
well as the requirements of all other gas fired equipment supplied by the meter. If the gas meter is too
small, ask the gas company to install a larger meter having adequate capacity.
GAS PRESSURE REGULATION
Minimum and maximum gas supply pressures are listed below: The minimum gas pressure specified
below is required for the full input rating specified on the water heater rating plate.
Natural Gas:
Minimum: 6.0” w.c.
Maximum: 10.5” w.c.
L.P. Gas:
Minimum: 10.0” w.c.
Maximum: 13.5” w.c.
BEFORE PLACING THE WATER HEATER IN OPERATION, CHECK FOR GAS LEAKAGE. USE SOAP
AND WATER SOLUTION OR OTHER MATERIAL ACCEPTABLE FOR THE PURPOSE OF LOCATING
GAS LEAKS.
WARNING
DO NOT use matches, candles, flame or other sources of ignition for this purpose.
Capacity Table for Natural Gas in Cubic Feet/Hour
(Table assumes 0.3 inch pressure drop, specific gravity of 0.60 for gas pressures of 0.5 psi or less)
Pipe
Length of Pipe in Feet (Meters)
Size in 10
20
30
40
50
60
70
80
90
100 125 150 175 200
Inches (3)
(6)
(9)
(12) (15) (18) (21) (24) (27) (30) (38) (45) (53) (61)
3⁄4”
278
190
152 130 115 105
96
90
84
79
72
64
59
55
1”
520
350
285 245 215 195
180 170 160 150 130 120 110 100
1 1⁄4”
1050 730
590 500 440 400
370 350 320 305 275 250 225 210
1 1⁄2”
1600 1100 890 760 670 610
560 530 490 460 410 380 350 320
Note: After determining the length of pipe required, select the pipe size that will supply the cubic feet per
hour of gas required for the input rating of the gas appliances on the line.
The formula for figuring the cubic feet per hour required is:
CFH = Gas Input of Appliance on the Line (Btu/hr)
Heating Value of Gas (Btu/Cu. Ft.)
The heating value may be obtained from the local natural gas utility
Capacity Table for LP Gas in MBH of undiluted liquefied petroleum gases
(Table assumes 11 inches of water column pressure at the inlet, 0.5” press. drop)
Pipe
Size in
Inches
1⁄2”
3⁄4”
1”
1 1/4”
10
(3)
275
567
1071
2205
20
(6)
189
393
732
1496
30
(9)
152
315
590
1212
Length of Pipe in Feet (Meters)
40
50
60
70
80
(12)
(15)
(18) (21) (24)
129
267
237
217
196 185
504
448
409
378 346
1039
913
834
771 724
90
(27)
100
(30)
125
(38)
150
(45)
173
322
677
162
307
630
146
275
567
252
511
INITIAL OPERATION AND TESTING (INSTALLER ONLY)
1. Open the gas and water supply valves to the water heater.
2. Check for water and gas leaks. Use soap solution to check for gas leaks.
3. To check inlet supply pressure, remove the 1/8” NPT plug on the gas inlet supply fitting just below
the bottom casing and install a barb fitting for attaching a hose to a manometer. For checking the
gas manifold pressure, the plug is located just below the gas manifold connection inside the
control panel.
19
4. Turn power on (after completing electrical connections – refer to Section VII, “Electrical
Connections”) and fully open a hot water tap.
5. Measure the gas pressures to see that these are within the specified limits below:
Supply Pressure:
Nat. Gas: Min.: 6”, Max.: 10.5” w.c.
L.P. Gas: Min.: 10”, Max.: 13.5” w.c.
Manifold Pressure:
Nat. Gas: 3.4” w.c. High Fire, 0.6” w.c. Low Fire
L.P. Gas: 5.1” w.c. High Fire, 0.9” w.c. Low Fire
6. Turn off the hot water faucets. Disconnect the electrical power to the water heater. Remove the
pressure gauges and replace the plugs. Check for gas leaks around the plugs.
7. Replace the front control panel. Restore electrical power to the water heater.
NOTICE
If the gas supply pressure is below the specified value, check the gas piping to insure that it is the correct
size for all the gas appliances on line. Check the supply pressure with all the gas appliances in operation.
The manifold pressure will vary with the water flow rate. Several hot water faucets may need to be
opened with the temperature control set on the highest setting in order to get maximum high fire manifold
pressure. If the manifold pressure is below the specified value and there is sufficient water pressure and
flow, be sure the inlet gas pressure is within the specified limits before attempting to adjust the manifold
pressure.
20
SECTION VII: ELECTRICAL CONNECTIONS
WARNING
Turn off or disconnect the electrical power supply to the water heater before servicing. Label all wires
prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
All electrical wiring must be installed and grounded in accordance with local codes, or in the absence of
local codes, the National Electrical Code, ANSI/NFPA 70 and/or CSA C22.2 Electrical Code.
The water heater must be wired to a 120 VAC, 60 Hz, 15A power supply. The water heater should be
connected to a GFI outlet and wired on a separate circuit and breaker. If a flexible line cord and plug is
permitted by local code, then provide a three wire GFI grounding type receptacle within reach of the
control box. Provide a grounded line cord and connect to the black and white power supply and green
ground screw. A strain relief will be required for the line cord. Do not plug the line cord into a receptacle
that can have the power supply interrupted by a switch that is used to control lights or another appliance.
If wiring in conduit is required, install an electrical conduit connector. A disconnect switch should be
provided near the water heater for servicing. Connect the wires exactly as shown in the wiring diagram of
this manual and on the inside cover panel. The black wire is the hot leg; the white wire is neutral. A
green screw is provided in the junction box for the green wire ground connection.
CAUTION
Do not energize the electric circuit before the water heater tank is filled with water.
21
Wiring Diagram
WARNING
DO NOT adjust any dipswitch settings on PC board!
22
Wiring Diagram – Schematic
23
REMOTE TEMPERATURE CONTROLS
The supplied Remote Main Control allows the customer to control the hot water supply temperature and
will display certain fault codes in the event the water heater needs servicing. If used without the Remote
Main Control connected, the residential models (IGE-199R-10N,10X) have a fixed temperature setting of
120°F and the commercial models (IGE-199C-5N, 5X) have a fixed temperature setting of 140°F.
Residential Models:
The Remote Control inside the carton is intended for installation in the kitchen, utility, or laundry area of a
home. The adjustment range for all residential water heater controls is 98-160°F.
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a temperature
setting of 135°F (57°C). To protect against hot water injury, install a ASSE approved mixing valve in the
water system. This valve will reduce point of discharge temperature by mixing cold and hot water in
branch water lines. A licensed plumbing professional or local plumbing authority should be consulted.
NOTICE
This water heater is equipped with an energy cut out device to prevent overheating. Should overheating
occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance and call a
qualified service agency.
CAUTION
This water heater, when set at a lower temperature setting is not capable of producing hot water of
sufficient temperature for sanitizing purposes.
Always check water temperature by hand before entering the shower or bath. The temperature may have
been changed.
Test the temperature of the water with your hand or elbow before placing a child in the bath or shower.
Do not leave a child or an infirm person in the bath unsupervised.
In addition, all models may have up to two optional remote controls (P/N 239-44509-00) installed in
bathrooms or other remote locations to control the temperature for showers and sinks. When these
controls are used, depressing the Priority Button will override the Main Remote Control and display the
setpoint of the Remote Control in use. All the remote Remote Controls will display fault codes in the
event the water heater needs service.
NOTICE
No more than three temperature controls may be connected to one EVERHOT® water heater.
NOTICE
The default temperature setting displayed for residential controls that will appear when the water heater is
first connected to the electrical supply or in the event of a power interruption is 120°F.
Before installing the remote controls, determine the most convenient locations(s). When deciding on the
best location for the remote controls, please consider the following items:
1. Place the controls out of reach of small children.
2. Avoid locations where the control(s) will become hot, such as over the stove, near the oven, or
other heat sources.
3. Avoid direct sunlight. (The digital readout can be difficult to read in direct sunlight).
4. Avoid areas where the remote can be splashed with cooking water, oil, or sauce.
5. The remote control operates with low voltage, 12 volts DC.
24
°F
Priority
Set Temperature
In Use
Main Controller
239-44509-00
endless hot water system
CAUTION: Hotter water increases the risk
of scald injury. Before changing temperature
setting, see instruction manual.
Main or Optional Remote Control for Residential Models (Fig. 6)
Temperature Control(s) Installation:
1. Determine how many controls will be installed and suitable location(s) for each. The controls may
be wired in series or parallel depending on the distance from the water heater to the controls.
2. Mark the holes on the wall using the control mounting plate and drill two mounting holes using a
3/32” (2.4 mm) drill bit and a clearance hole for the cable using a 1⁄4” (6.4 mm) drill bit.
3. Run the cable from the control to the water heater or another control, which ever is closer or more
convenient.
4. Remove the face plate from the remote control by inserting a screwdriver in the slot and twisting
open.
5. Connect the cable to the terminal screws of the remote control.
6. Mount the control to the wall using the holes drilled and with the screws supplied. Note: Plastic
wall anchors may be required if the control is not located over a stud when mounting on
wallboard.
Note: If the cable cannot be run inside the wall cavity, then the plastic knockout should be removed from
the top or bottom of the control to allow flush mounting with the wall.
7. Disconnect the power from the water heater and remove the front cover.
8. Remove the plastic cover from the PCB and electrical connections.
25
WARNING
Do not attempt to connect the remote controls with the power on to the water heater. There are 120 volt
terminals and wiring next to the remote control connections inside the unit. All servicing and wiring must be
performed by a certified installer.
9. Thread the cable through the access hole at the base of the water heater and connect the wires
to the control terminals on the right hand side of the PCB. See control wiring illustration (fig. 8).
10. Secure the control cable using the clamp provided in the control compartment.
11. Replace the plastic cover over the PCB terminals and then replace the front control panel of the
water heater.
Commercial Models:
The Main Remote Control (inside water heater carton) is intended for installation in a convenient location
near where most of the hot water will be used. The adjustment range for this control for commercial
models only is 98-185°F. If the water heater is used without the Main Control connected, then the factory
default temperature setting is 140°F. In addition, the control will display fault codes in the event the water
heater needs service. Up to two additional optional remote controls may be purchased and installed, if
desired.
WARNING
When the Remote Control is used in public use applications, it must be installed in a location where it
cannot be adjusted by the public (i.e., a maintenance room or manager’s office). Unauthorized
adjustments may result in scalding conditions.
NOTICE
No more than three temperature controls can be connected to one EVERHOT® water heater
Before installing the remote control, determine the most convenient location. When deciding on the best
location for the remote control, please consider the following items:
1. Place the control out of reach of small children.
2. Avoid locations that may allow adjustment by unauthorized personnel (see above warning).
3. Avoid locations where the control will become hot, such as over the stove, near the oven, or other
heat sources.
4. Avoid direct sunlight. (The digital readout can be difficult to read in direct sunlight).
5. Avoid areas where the remote can be splashed with cooking water, oil, or sauce.
6. The remote control operates with low voltage, 12 volts DC
26
°F
Priority
Set Temperature
In Use
Main Controller
239-44509-00
endless hot water system
CAUTION: Hotter water increases the risk
of scald injury. Before changing temperature
setting, see instruction manual.
Control for Commercial Models (Fig. 7)
Remote Temperature Control Installation:
Follow the same control installation procedure as outlined under “Temperature Control Installation” for
residential models.
WARNING
Do not attempt to connect the remote controls with the power on to the water heater. There are 120 volt
terminals and wiring next to the remote control connections inside the unit. All servicing and wiring must
be performed by a qualified installer.
Fig. 8 Control Wiring Connections Inside Water Heater
INITIAL OPERATION AND TESTING OF CONTROLS (INSTALLER ONLY)
1. Turn on power to the water heater and fully open a hot water tap.
2. Check the operation of the water heater. Check the operation of the remote temperature
control(s). Check the operation of the power failure protection system (drain solenoids).
3. Explain the proper operation of the new Laars EVERHOT® water heater to the
customer.
27
SECTION VIII: OPERATING INSTRUCTIONS
WARNING
Water heaters are heat-producing appliances. To avoid damage or injury there must be no materials
stored against the water heater or near the front vent outlet, and proper care must be taken to avoid
unnecessary contact (especially by children) with the water heater and front vent outlet. UNDER NO
CIRCUMSTANCES SHOULD FLAMMABLE MATERIALS, SUCH AS GASOLINE OR PAINT THINNER
BE USED OR STORED IN THE VICINITY OF THIS WATER HEATER OR IN ANY LOCATION FROM
WHICH FUMES COULD REACH THE WATER HEATER.
Installation or service of this water heater requires ability equivalent to that of a licensed tradesman in the
field involved. Plumbing, air supply, venting, gas supply and electrical work are required.
Light the unit in accordance with the operating instructions label attached to the water heater.
Under no circumstances should the input rate exceed the input rate shown on the water heater rating
plate. Over firing could result in damage or sooting of the water heater.
If the unit is exposed to the following, do not operate water heater until all corrective steps have been
made by a factory authorized independent service contractor or qualified service professional.
1. Flooding to or above the level of the burner or controls
2. External firing
3. Damage
4. Firing without water
5. Sooting
NEVER OPERATE THE WATER HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH
WATER AND A PRESSURE RELIEF VALVE IS INSTALLED IN THE HOT WATER OUTLET PIPING OF
THE WATER HEATER.
GENERAL INSTRUCTIONS
TO FILL THE WATER HEATER
1. Close the water heater drain valve by turning the knob or valve stem clockwise.
2. Open the cold water supply shut-off valve.
3. Open several hot water faucets to allow air to escape from the system.
4. When a steady stream of water flows from the faucets, the water heater is filled. Close the
faucets and check for water leaks at the water heater drain valve, pressure relief valve and the
hot and cold water connections.
SEQUENCE OF OPERATION
1. The water heater senses the minimum operating water flow which starts the ignition sequence to
light the burners.
2. Blower ON.
3. Pressure switch proves blower operation.
4. Gas valve opens and spark igniter starts.
5. Main burner ON.
6. Flame signal confirmed.
7. Burner flame and combustion blower modulates to maintain selected outlet temperature.
8. Water flow is also regulated to not exceed the capacity of the water heater for the temperature
selected.
9. Water flow shuts off.
10. Burners shut off immediately, but combustion blower continues for another 65 seconds to purge
heat from coil.
28
LIGHTING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
A. This appliance does not have a pilot.
C. Use only your hand to operate the remote
It is equipped with a direct ignition
control keypad. Never use tools. If the
device, which automatically lights
remote keypad doesn’t work, do not try to
the burner. Do not try to light the
repair it, call a qualified service technician.
burner by hand.
Forced or improper repair may result in a fire
or explosion.
B. BEFORE OPERATING: Smell all
D. Do not use this appliance if any part has been
around the appliance area for gas.
under water. Immediately call a qualified
Be sure to smell next to the floor
service technician to inspect the appliance
because some gas is heavier than
and to replace any part of the control system
air and will settle on the floor.
and any gas control, which has been under
water.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
• Do not touch any electric switch; do
instructions.
not use any phone in your building.
• If you cannot reach your gas supplier, call the fire
department.
OPERATING INSTRUCTIONS
1. STOP! Read the safety information
6. Wait (5) minutes to clear out any gas. If you
above before proceeding.
then smell gas, STOP! Follow “B” in the safety
information above on this label. If you don’t smell
gas, go to next step.
2. Set the thermostat to the lowest
7. Turn the manual valve located at the gas inlet of
setting.
appliance counterclockwise
to “ON” (see
Figure 9).
3. Turn off all power to the electrical
8. Turn on all electric power to the appliance.
appliance.
4. This appliance does not have a pilot.
9. Set the thermostat to desired setting.
It is equipped with a direct ignition
10. If the appliance will not operate, Follow the
device, which automatically lights
instructions “To Turn Off Gas To Appliance” and
the burner. Do not try to light the
call your service technician or gas supplier.
burner by hand.
5. Turn the manual valve located at the
gas inlet of the appliance clockwise
to “OFF” (see Figure 9).
TO TURN OFF GAS TO THE APPLIANCE
1. Set the thermostat to the lowest
3. Turn the manual valve at gas inlet of appliance
setting.
clockwise
to “OFF” (see Figure 9).
2. Turn off all electric power to the
appliance if service is to be
performed.
Manual Gas Valve (Fig 9)
29
CAUTION
In climates where below freezing temperatures may occur, the water heater must be drained when
power is off to the water heater to prevent freeze damage to the heat exchanger. Drain solenoids
are recommended to prevent freeze damage during power failures in cold climate regions.
TURNING OFF THE WATER HEATER FOR AN EXTENDED PERIOD OF TIME
If the EVERHOT® water heater is to be turned off for an extended period of time, the following steps
should be taken.
1. Turn the gas shutoff valve on the gas supply inlet to the OFF position (see operating instructions).
2. Disconnect the electrical supply to the water heater.
3. Shut off the cold water supply to the water heater and open the drain valve to drain the water
heater. If the water heater was installed with drain solenoid freeze protection, the water heater
will drain automatically when power is disconnected.
TEMPERATURE ADJUSTMENT
DANGER
Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a temperature
setting of 135°F (57°C). To protect against hot water injury, install a ASSE approved mixing valve in the
water system. This valve will reduce point of discharge temperature by mixing cold and hot water in
branch water lines. A licensed plumbing professional or local plumbing authority should be consulted.
CAUTION
This water heater, when set at a lower temperature setting is not capable of producing hot water of
sufficient temperature for sanitizing purposes.
Always check water temperature by hand before entering the shower or bath. The temperature may have
been changed.
NOTICE
This water heater is equipped with an energy cut out device to prevent overheating. Should overheating
occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance and call a
qualified service agency.
NOTICE
The lower the temperature setting, the greater the energy efficiency to heat the water. Lower water
temperatures also extend the heat exchanger life. Remember, no water heating system will provide
exact temperatures at all times. Allow a few days of operation at this setting to determine the correct
temperature setting consistent with the requirements for the installation.
Residential Models (see Figure 10):
1. The outlet water temperature of the EVERHOT water heaters is adjusted using the Remote Main
Control supplied in the water heater carton. When additional Remote Controls are installed, the
temperature can only be adjusted on the remote control that has the Priority Indicator Light
glowing. The temperature displayed on the control in use will also be displayed on all the other
remote controls.
30
2. To set the desired temperature on the remote control, all hot water faucets must be closed. If
there are other Remote Controls installed, press the “Priority” button on the control you want to
change the setting on and the yellow “Priority” indicator light will glow.
3. Press the “H” or “C” button until the required temperature is displayed on the digital monitor. All
residential controls have a maximum temperature setpoint of 160°F.
4. To operate the water heater, simply turn any hot water tap on. This will automatically light the
burner and provide hot water at the preset temperature. If the optional remote controls have
been installed, the green “IN USE” indicator light will glow on all remote controls.
5. All controls can also display diagnostic error codes, water flow rate through the unit (in gallons
per minute) and the outlet water temperature.
6. Pressing the “Priority Button” followed by the “H” button will display a sequence of up to 9 error
codes, if any, stored in memory that has been experienced. Any error codes will be displayed on
the digital monitor in sequence starting with the most recent code.
7. To display the water flow through the water heater with hot water in use, depress the “H” button
for 2 seconds and then simultaneously press the “P” button. (GPM = Display Readout X 0.1).
8. To display the outlet water temperature while in use, depress the “C” button for 2 seconds and
then simultaneously press the “P” button.
°F
Priority
Set Temperature
In Use
Main Controller
239-44509-00
endless hot water system
CAUTION: Hotter water increases the risk
of scald injury. Before changing temperature
setting, see instruction manual.
Control For Residential Models (Fig 10)
NOTICE
The temperature can only be adjusted between 98°F and 110°F when the hot water tap is open and hot
water is flowing. This is a safety feature to prevent scalding while hot water is in use.
NOTICE
The default temperature setting displayed for residential controls that will appear when the water heater
is first connected to the electrical supply or in the event of a power interruption is 120°F.
31
Commercial Models (see Figure 11):
1. Commercial models are supplied in the water heater carton with a Remote Main Control, which
will allow the outlet water temperature to be adjusted from 98-185°F. When additional Remote
Controls are installed, the temperature can only be adjusted on the remote control that has the
Priority Indicator Light glowing. The temperature displayed on the control in use will also be
displayed on all the other remote controls.
2. All hot water faucets must be off to get the full range of temperature adjustment. The control will
only allow an adjustment range of 98-110°F while hot water is in use to prevent scalds. If there
are other Remote Controls installed, press the “Priority” button on the control you want to change
the setting on and the yellow “Priority” indicator light will glow.
3. Press the “H” or “C” buttons until the desired temperature is shown on the display.
4. The water heater will automatically start heating water whenever a hot water faucet is opened.
The remote temperature control(s) will indicate hot water use with the green “IN USE” indicator.
5. All controls can also display diagnostic error codes, water flow rate through the unit (in gallons
per minute) and the outlet water temperature.
6. Pressing the “Priority Button” followed by the “H” button will display a sequence of up to 9 error
codes, if any, stored in memory that has been experienced. Any error codes will be displayed on
the digital monitor in sequence starting with the most recent code.
7. To display the water flow through the water heater with hot water in use, depress the “H” button
for 2 seconds and then simultaneously press the “P” button. (GPM = Display Readout X 0.1).
8. To display the outlet water temperature while in use, depress the “C” button for 2 seconds and
then simultaneously press the “P” button.
°F
Priority
Set Temperature
In Use
Main Controller
239-44509-00
endless hot water system
CAUTION: Hotter water increases the risk
of scald injury. Before changing temperature
setting, see instruction manual.
Control for Commercial Models (Fig 11)
32
CAUTION
Check local codes for the maximum water temperature setting allowed when used in nursing homes,
schools, day care centers, and all other public use applications.
NOTICE
The default temperature setting displayed for commercial controls that will appear when the water heater
is first connected to the electrical supply or in the event of a power interruption is 140°F.
SCALDING
CAUTION
Test the temperature of the water with your hand or elbow before placing a child in the bath or shower.
Do not leave a child or an infirm person in the bath unsupervised.
This water heater can deliver scalding temperature water at any faucet in the system. Be careful
whenever using hot water to avoid scalding injury. Certain appliances such as dishwashers and
automatic clothes washers may require increased temperature water. By setting the thermostat on this
water heater to obtain the increased temperature water required by these appliances, you may create the
potential for scald injury. To protect against injury, you should install an ASSE approved mixing valve in
the water system. This valve will reduce point of discharge temperature by mixing cold and hot water in
branch supply lines. Such valves are available from the local plumbing supplier.
The following chart details the relationship of water temperature and time with regard to scald injury and
may be used as a guide in determining the safest water temperature for your applications.
33
APPROXIMATE
TIME/TEMPERATURE
RELATIONSHIPS IN SCALDS
120°F (49°C) More than 5 minutes
125°F (52°C) 11⁄2 to 2 minutes
130°F (54°C) About 30 seconds
135°F (57°C) About 10 seconds
140°F (60°C) Less than 5 seconds
145°F (63°C) Less than 3 seconds
150°F (66°C) About 11⁄2 seconds
155°F (68°C) About 1 second
FIRST AID FOR SCALDS
1. Remove all wet clothing quickly. Wet clothing retains the heat.
2. Apply cold water to burned area for 30 minutes to reduce the heat in the skin and prevent deeper
burning. Never use butter, oils, or ointment to cover the burn. They may retain the heat.
3. Use a blanket to keep the scalded person warm.
4. Seek medical advice.
ERROR MESSAGES ON REMOTE TEMPERATURE CONTROL DISPLAY
The LAARS EVERHOT® tankless water heaters have the ability to monitor and display any
operating faults on the remote temperature control display. The error messages will display on the
monitor and will assist in servicing the water heater. The following is a listing of the error codes that may
flash on the remote monitor in case of a malfunction with the water heater. Please quote the code
displayed when calling for service.
Code
Displayed
10
11
Fault
Remedy
Air supply or exhaust blockage
No Ignition
12
Flame Failure, grounding failure
14
16
Thermal Fuse
Over Temperature Warning
32
33
Outlet water temperature faulty
Heat exchanger outlet water temperature
faulty
Combustion air sensor faulty
Modulating Solenoid Valve signal
abnormal
Combustion Fan Failure
Solenoid Valve Driving Circuit Faulty
Flame Sensing Device Faulty
Check for a restriction in the exhaust vent.
Check to make sure the gas supply is on to the
water heater.
Make sure gas is turned on at the water heater;
check for obstructions in exhaust vent.
Heat exchanger overheated
Excessive temperatures, wrong dip switch
setting, incorrect manifold pressure or gas type.
Outlet sensor or wiring may be defective
H.E. outlet sensor or wiring may be defective.
34
52
61
71
72
LC
(00)
Scale build-up in Heat Exchanger
(When checking maintenance code
history, “00” is substituted for “LC”).
Thermistor or wiring faulty
Check gas control and wiring
Combustion fan or wiring faulty
Check all gas solenoids and wiring
Lack of flame sense – check flame rod and
wiring connections.
Build up of lime scale in heat exchanger –
needs to be flushed.
If any of the above error codes are seen flashing on the remote display, call for service.
WARNING
Failure to remedy faults may result in severe burns, scalds, and/or death.
34
SECTION IX: MAINTENANCE
WARNING
Always turn off the electrical power supply, the manual gas valve, and the manual water control valve
whenever servicing this appliance.
KEEP THE APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE,
AND OTHER FLAMMABLE VAPORS AND LIQUIDS!
Do not block the air inlet openings on the front panel or flue exhaust vent. These openings must be kept
free of debris or obstructions for combustion air supply to the burners.
The EVERHOT® water heater should be checked annually by a qualified technician. Regular
maintenance will keep the water heater operating efficiently and help to assure reliable operation and a
long service life.
1. Remove and clean the inlet water filter screen.
2. Visually inspect the burner flames. The flame must burn with a clear blue, stable flame. Refer to
Figure 12, “Burner Flame Appearance” for satisfactory flame appearance. If the burner flame
appearance is not satisfactory or debris is visible on the burners, remove and clean with a
vacuum cleaner.
3. Check the front vent outlet for any obstructions.
4. All electric motors are permanently lubricated and do not need oiling. Remove the combustion air
blower and clean wheel and housing with soft brush or vacuum.
5. If the “LC” code has been flashing on the remote display, the heat exchanger will need flushing to
remove lime and scale deposits. Refer to the “Flushing Procedure for Lime Scale Removal From
Heat Exchanger” procedure in the Maintenance Section.
6. Check operation of the pressure relief valve. To check the relief valve, lift the lever at the end of
the valve several times. The valve should seat properly and operate freely. If water does not
flow, remove and inspect for obstructions or corrosion. Replace with a new valve of the
recommended size as necessary. A thorough inspection of the valve should be performed at
least every three years by removing the pressure relief valve from the outlet piping. Do not
attempt to repair the valve, as this could result in improper operation and explosion of the heat
exchanger and piping. In areas with poor water conditions, it may be necessary to inspect the
pressure relief valve more often than the recommended maintenance schedule.
Burner Flame Appearance (Fig 12)
35
WARNING
Before manually operating the valve, make sure that a drain line has been attached to the valve to direct
the discharge to an open drain. Failure to take this precaution could mean contact with extremely hot
water passing out the valve during this checking operation.
FLUSHING PROCEDURE FOR LIME SCALE REMOVAL FROM HEAT EXCHANGER
The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature
and usage. The higher the water temperature or water usage and the harder the water (more dissolved
calcium carbonate), the more lime deposits are dropped out of the water. This is the lime scale that forms
in pipes, water heaters and on cooking utensils.
Lime accumulation reduces the efficiency and longevity of the heat exchanger coil and will cause the
water heater to malfunction. The lime scale may need to be periodically removed from the heat
exchanger (indicated by the “LC” code on the remote display). The usage of water softening equipment
greatly reduces the hardness of the water. However, this equipment does not always remove all of the
hardness (lime). The heat exchanger may occasionally need to be flushed to clear out the lime deposits.
Use the following procedure and diagram (fig. 13) to flush the heat exchanger and remove the lime scale.
1. Disconnect power to the water heater.
2. Close valves in the cold water inlet and outlet supply.
3. Connect PVC hoses (may use garden hose to the drain valve outlet fittings). Connect a circulator
pump to the hose connected to the cold water inlet. See figure 13 for hose and circulator
connections.
4. Pour 4 gallons of fresh vinegar into a 5 gallon bucket.
5. Place the ends of the hose into the bucket.
6. Open the drain valves to the hose fittings.
7. Turn on power to the circulating pump and allow the vinegar to circulate through the heat
exchanger coil for at least 45 minutes. Heavily limed heat exchangers may require several hours.
8. Turn off power to the circulating pump.
9. Run hose from hot water outlet to a drain.
10. Close the drain valve on the cold water inlet. Leave hot water drain valve open. Open cold water
inlet to flush with fresh water.
11. Allow water to flow out of the hose for 5 minutes to flush vinegar from the water heater.
12. Shut off cold water inlet valve. Remove filter screen and clean out any sediment. Reinstall.
13. Close the hot water drain valve. Open the cold water inlet and hot water supply valves.
14. Disconnect the hoses from the drain valve connections.
15. Restore power to the water heater and check operation.
36
Lime Scale Flushing Diagram (Fig 13)
COMMON TROUBLESHOOTING COMMENTS ON THE OPERATION OF THE EVERHOT®
TANKLESS WATER HEATER
Comment: I don’t have any hot water when I open the tap!
Make sure the gas and electricity is turned on to the water heater. The remote temperature display
should have the green light lit when a hot water tap is open and the water heater is operating. Make sure
there are no error codes flashing on the display.
Comment: When I was using the hot water, the water got cold!
If you reduced the hot water flow from the tap, you may have reduced the flow below the minimum flow to
operate the water heater. If you mix the hot water with cold water at the tap in an attempt to get a
temperature below the temperature being produced by the water heater, the hot water flow through the
water heater may drop below the minimum flow required to operate the water heater. To remedy this
situation, either increase the total water flow from the tap or using the remote temperature controller,
decrease the setpoint temperature of the water heater to the temperature desired at the tap.
Comment: White smoke comes out of the exhaust!
During colder weather when the exhaust temperature is much hotter than the ambient air, the moist
exhaust gases condense producing a white vapor cloud.
Comment: When I open a hot water faucet I do not immediately get hot water!
Hot water must travel through the plumbing piping to the faucet. This may take from 10 to 30 seconds
depending upon the length of cold plumbing pipe the water must travel through.
Comment: After I turn off the hot water tap, the fan on the water heater continues to run!
The fan is designed to continue to run for 65 seconds after the flow of water stops. This is to ensure
constant water temperature during frequent short water draws (such as washing dishes) as well as
exhausting residual heat and flue gases from the water heater and venting system.
37
SCHEMATIC DIAGRAM OF INTERNAL PARTS
38
SECTION X: PARTS LIST
Cabinet
Note: Can purchase additional controls
for remote locations.
39
Internal Components
40
Internal Components
41
Electrical Components
42
Number
001
002
003
004
005
006
007
008
009
011
102
103
104
105
106
107
108
109
110
110
111
112
113
115
116
117
118
119
120
122
123
127
128
132
136
137
138
140
400
401
402
403
404
405
406
407
408
409
410
411
702
703
704
705
706
707
708
709
710
711
715
PARTS LIST
Description
Front Panel Assembly
Casing Assembly
Wall Installation Bracket
Connection Reinforcement Panel
Heat Protection Plate
Rubber Bushing
Front Panel Gasket
Front Panel Gasket - Side
Front Air Inlet Grill
Rubber Bushing
Gas Connection (3⁄4” NPT)
Burner Unit Assembly
Burner Case Front
Burner Case Bottom Panel
Burner Air Orifice Plate
Bunsen Burners
Burner Case Back Panel
Damper Plate
Manifold Assembly – Natural Gas
Manifold Assembly – L.P. Gas
Gasket – Combustion Chamber
Lower Gasket – Combustion Chamber
Combustion Chamber Pressure Tap Screw
Combustion Chamber Front Plate
Spark Electrode
Flame Sense Rod
Electrode Gasket
Electrode Holder
Upper Combustion Chamber Gasket
Fan Casing Assembly
Blower Motor
Blower Mounting Bracket
Blower Gasket
Combustion Chamber Bracket
Flue Outlet
Flue Outlet Gasket
Flue Outlet Gasket - 6
Heat Exchanger – Complete Assembly
Water Inlet – 3⁄4” NPT
Water Flow Servo and Sensor Assembly
Rectifier
By-pass Servo Assembly
Stop Bracket
Plug Band
Water Filter Assembly
Filter Plug
Hot Water Outlet – 3⁄4” NPT
Stop Bracket
Plug Band - Small
Drain Valve
PCB Cover - Side
PCB Cover - Front
Transformer Assembly
Ignitor Bracket
Ignitor
High Tension Lead
Spark Electrode Boot
Thermistor
Thermistor Clip - Large
Thermal Fuse Clip
120v Valve Heater Assembly
43
Quantity
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
16
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
5
1
Number
716
717
718
720
721
722
723
725
726
730
731
732
733
734
735
801
802
803
804
805
806
807
808
809
810
813
814
815
817
818
238-44959-00
239-44509-00
PARTS LIST
Description
Anti-Frost Heater Clip
Anti-Frost Heater Clip A
Anti-Frost Heater Clip
Power Supply Harness
Fuse Harness
100v Harness
Solenoid Valve Harness
Thermal Fuse Harness
Mold-type Limit Switch
PCB Assembly
Surge Protector
Frost Sensing Switch
120V Anti-Frost Heater Assembly
Sensor Harness - 2
Water Flow Sensor
Screw
Washer
Screw
Screw
Screw
Screw
Washer
Screw
Screw
O-Ring
O-Ring
O-Ring
O-Ring
O-Ring
Gasket
Installation and Operating Instructions
Universal Remote Temperature Control
Quantity
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
4
3
1
3
4
4
4
4
3
2
2
2
1
2
1
1
Note: When ordering service replacement parts, the full model and serial numbers from the water
heater nameplate are required.
800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
Litho in U.S.A. © Laars Heating Systems 0810 Document 11044
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