Vesta VH-150 User manual

HYBRID WATER HEATER
User Manual
Model
VH-150
VH-199
Keep this manual near the water heater for future reference
whenver maintenance or service is required.
Danger Water heater for other than recreational vehicle installation only
READ ALL OF THE INSTRUCTIONS THOROUGHLY BEFORE OPERATING THIS WATER HEATER.
This manual provides information on the installation, operation, and maintenance of the water heater. For
proper operation and safety, it is important to follow the instructions and adhere to the safety precau tions.
A licensed professional must install the water heater according to the exact instructions of the manual.
Warning If the information in these instructions is not followed exactly, 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.
- 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 re department.
- Installation and service must be performed by a licensed professional.

2
Installation Manual
Safety Information
The following safety symbols are used in this manual for user's safety. Read this manual carefully and follow all instructions to avoid property
damage, re, explosion, personal injury, or death.
Warning
Caution
Indicates an imminently hazardous situation which, if not avoided, will result in severe injury or death.
Indicates a potentially hazardous situation which, if not avoided, will result in injury or death.
Indicates a potentially hazardous situation which, if not avoided, could result in property damage.
Danger
If you smell gas:
•Do not try to light any appliance.
•Do not touch any electrical switches or use landline phones.
•From a neighbor’s phone, call your gas provider and follow their instructions.
•If you cannot reach your gas provider, call the re department.
Do not use or store ammable products, such as gasoline, solvents, or adhesives in the same room or area as the water heater.
•Vapors from ammable liquids can explode and/or catch re causing death or severe burns.
•Keep ammable products far away from the water heater and store them in approved containers. Keep the containers tightly closed and out
of the reach of children.
•The Water heater has a main burner ame that can come on at any time and will ignite ammable vapors.
•Vapors cannot be seen and are heavier than air. Vapors travel a long way on the oor and can be carried from other rooms to the main
burner ame by air currents.
Avoid using hot water over 125F.
•Water temperature over 125F can cause severe burns or death from scalding.
•Children, the disabled and the elderly are at highest risk of being scalding.
•Test water before bathing or showering.
Temperature Time to Produce Serious Burn Temperature Time to Produce Serious Burn
120 °F (48 °C) More than 5 minutes 140 °F (60 °C) Less than 5 seconds
125 °F (51 °C) 1.5 to 2 minutes 145 °F (62 °C) Less than 3 seconds
130 °F (54 °C) Approx. 30 seconds 150 °F (65 °C) Approx. 1.5 seconds
135 °F (57 °C) Approx. 10 seconds 155 °F (68 °C) Approx. 1 second
Danger

3
Safety Information
Warning
•Do not store combustibles, such as papers or laundry, near the water heater or venting system.
Failure to do so may result in re or explosion.
•Do not store or use gasoline or other ammable liquids near this water heater.
Failure to do so may result in re or explosion.
•Do not store or use compressed gases, such as hair sprays or spray paints, near the water heater or venting system, including the
vent termination.
Failure to do so may result in re or explosion.
•Do not remove the front cover unless the power to the water heater is turned o or disconnected.
Failure to do so may result in electric shock.
•Do not touch the internal components of the water heater or the power cord with wet hands.
Failure to do so may result in electric shock.
•Do not operate the water heater with the front cover opened.
Failure to do so may result in re or carbon monoxide (CO) poisoning, which may result in property damage, personal injury, or death.
•Do not operate the water heater without proper venting.
Failure to do so may result in re or carbon monoxide (CO) poisoning, which may result in property damage, personal injury, or death.
•Shut o the gas supply if the water heater is damaged.
Have your installer or plumber show you the location of the gas shut o valve and demonstrate how to close the valve. If the water heater
is damaged as a result of overheating, re, ood, or any other reason, close the manual shut o valve and do not operate the water heater
again until it has been inspected by a qualied technician.
•Should overheating occur or if the gas supply fails to shut o, turn o the manual gas shut o valve.
Caution
•Do not use the water heater for anything other than its intended purpose, as described in this manual.
Failure to do so may result in property damage, personal injury, or death.
•Do not turn on the water heater unless the water and gas supplies are fully opened.
Failure to do so may damage the water heater.
•Do not use unapproved replacement or accessory parts.
Failure to do so may result in improper or dangerous operation and will void the manufacturer's warranty.
•When servicing the controls, label all wires prior to disconnecting them.
Failure to do so may result in wiring errors,
•Do not place anything in or around the vent terminals that could obstruct the air ow in or out of the water heater.
Failure to do so may result in re or carbon monoxide (CO) poisoning, which may result in property damage, personal injury, or death.
•Do not attempt to repair or replace any part of the water heater, unless it is specically recommended in this manual.
For all other service, contact an authorized technician or licensed professional. Improper adjustments, alterations, service, or maintenance
may lead to property damage, personal injury, or death and will void your warranty.
•Do not operate the water heater if you suspect something might be wrong with it.
Doing so may result in product damage or personal injury.
•Do not allow children to operate or have access to the water heater.
Doing so may result in product damage or personal injury.
•Do not turn on the water heater unless the water and gas supplies are fully opened.
Doing so may damage the water heater.
•Do not use this appliance if any part has been immersed in water.
Immediately call a qualied service technician to inspect the appliance and replace any part of the control system and/or any gas control
which has been immersed in water.
•This water heater has been approved for use in the USA and Canada only.
Using the water heater in any other country will void the manufacturer's warranty.

4
Installation Manual
Table of Contents
Safety Information .................................... 2
Front Panel................................................. 5
Digital Display and Icons................................................ 5
Buttons.................................................................................. 5
Operating the Water Heater ..................... 6
Turning the Water Heater On or O ........................... 6
Setting the Water Temperature.................................... 6
Viewing Basic Information............................................. 6
Maintaining the Water Heater .................. 7
Draining the Water Heater............................................. 7
Cleaning the Inlet Nipple Filter.................................... 8
Cleaning the Air Intake Filter ........................................ 8
Protecting the Water Heater from Freezing............. 9
Maintenance Schedules.................................................. 9
Troubleshooting ...................................... 10
Basic Problems .................................................................10
Error Codes ........................................................................11
Limited Warranty..................................... 12

5
Front Panel
Front Panel
Caution
After installing the water heater, you must proceed to Self-
adjusting Mode before using the water heater.
Digital Display and Icons
The digital display and icons on the front panel provide important
information required for the operation of the water heater. Refer to
the table below for detailed information.
F
A
B
C
D
E
G
H
I
J
Icon Description
ADigital display
Displays water temperature, error codes, etc.
BPump
Indicates recirculation pump operation.
CCascade
Indicates cascade operation.
D
Liter Per Minute
Indicates ow rate of hot water supply in
LPM.
E
Gallon Per Minute
Indicates ow rate of hot water supply in
GPM.
FError
Indicates error.
GCombustion
Indicates gas burner operation.
HCombustion load
Indicates combustion load in percentage.
IOut temperature
Indicates temperature of hot water supply.
JIn temperature
Indicates temperature of cold water inlet.
Buttons
Using the buttons on the front panel, you can turn the water heater
on or o, adjust the water temperature, and change modes to
monitor the operation status. Refer to the table below for detailed
information.
C
A
D
B
Button Description
APower
Turns the water heater on or o.
BMode
Changes the mode.
C
UP
Increases the temperature.
DDown
Decreases the temperature.

6
Installation Manual
Operating the Water Heater
Turning the Water Heater On or
O
To turn the water heater on or o, press the button.
When the water heater is on, the water temperature which has been
set recently will appear on the digital display.
Setting the Water Temperature
Danger
If your household includes children, or elderly or disabled
individuals, consider using a lower temperature setting.
Caution
Test the temperature of the water before use.
To set the water temperature, press the (Up) or (Down)
buttons until the desired temperature appears on the digital display.
Temperature range
°F
98 100 102 104 106 108 110 112 114 116 118 120 130 140 150 160
°C
37 38 39 40 41 42 43 44 45 47 48 50 54 60 65 71
Notice
•Between 98°F (37°C) to 120°F (50°C), the temperature can be set in 2°F
increments.
•Between 120°F (50°C) to 160°F (71°C), the temperature can be set in
10°F increments. To change the temperature, press the button for
5 seconds.
Viewing Basic Information
To view information about the water heater, press the
button.
Notice
By pressing the button repeatedly, dierent information will be
viewed in the digital display.

7
Maintaining the Water Heater
Maintaining the Water Heater
Danger
Before cleaning the water heater, make sure the water heater
is turned o and the power supply is disconnected. The water
heater may remain hot for few minutes after it is turned o.
Wait until the water heater has cooled down before cleaning to
prevent burns.
Draining the Water Heater
To perform maintenance tasks or to prevent the water heater from
freezing when it will not be used for an extended period, the water
heater must be drained.
To drain the water heater:
1Press the button to turn o the water heater.
2Disconnect the power supply to the water heater.
3Turn o the gas valve.
Side view
4Turn o the water supply valve on the inlet to the water
heater.
Hot water Cold water
Notice
If there is no water supply valve, turn o the water supply at the water
main.
5Open all hot water faucets and drain the water remaining in
the plumbing lines.
6Place a bucket under the drain valve.
7Open the drain valve and allow any residual water to drain
from the water heater.
8Close the drain valve when the water is completely drained.
Notice
Follow the steps in reverse order to rell the water heater.

8
Installation Manual
Cleaning the Inlet Nipple Filter
To clean the inlet nipple lter:
1Drain the water heater. Refer to "Draining the Water Heater" on
page 7.
2Remove the inlet nipple lter from the top of the water heater.
Inlet nipple lter
3Rinse the inlet nipple lter with clean running water.
4Reinsert the inlet nipple lter.
5Rell the water heater. Refer to "Draining the Water Heater" on
page 7.
Cleaning the Air Intake Filter
To maintain the water heater properly, clean the air intake lter
every 2–3 months. If the air intake lter is clogged by dust or lint,
the water heater will cease to operate or error can occur.
To clean the air intake lter:
1Press the button to turn o the water heater.
2Disconnect the power supply to the water heater.
3Remove the water heater front cover by loosening the 2
Phillips screws securing it to the case.
1
1
2
2
4Remove the air intake lter located under the air intake
connector.
Air intake lter

9
Maintaining the Water Heater
5Rinse the air intake lter with clean running water.
6Dry the air intake lter completely.
7Reinsert the air intake lter.
8Replace the front cover.
Protecting the Water Heater from
Freezing
Caution
•To protect the water heater from freezing, recommend
the use of a direct vent exhaust and intake system. Ensure
that the exhaust vent pipe and the air intake pipe are both
connected directly from the collars on the top of the water
heater to the outdoors. This type of vent system minimizes
air movement within the water heater.
•Freezing damage usually occurs due to back-drafting
caused by negative pressure in the building. This is not a
manufacturing defect, and therefore, Vesta will not warrant
any damage due to freezing. The installer is responsible
for ensuring that there is sucient make-up air to avoid
such a situation, and the owner is responsible for ensuring
protection against freezing.
To protect the water heater from freezing, follow these guidelines:
•If the water heater will not be used for an extended period of
time, drain the water heater.
•Do not unplug the power supply cord, except for routine
maintenance. The water heater has a freeze protection function
that warms up the water heater when the temperature inside
the water heater becomes lower than 43°F (6°C). The freeze
protection function will operate regardless of whether or not
the front panel is turned on or o, as long as the power supply is
still connected.
•If the power or gas supply must be disconnected for an
extended period, drain the water heater.
•Protect and insulate all water pipes, including the condensate
trap drain line, from freezing.
Notice
If you suspect that the water heater is frozen, contact an authorized
technician or licensed professional.
Maintenance Schedules
Caution
A qualied technician should inspect the water heater at the
beginning of every heating season and/or when there is a
problem.
Owner maintenance
Daily
•Check that the area where the water heater is installed is free of
combustible/ammable material and air-contaminants.
•Visually inspect the exterior of the water heater.
Monthly
•Inspect the condensate trap and the PVC ttings.
•Visually inspect the piping (water and gas) for leaks.
•Visually inspect the vent piping for signs of leakage and
blockage.
Every 6 months
•Inspect the piping (water and gas) for leaks.
•Inspect the vent piping for leakage and blockage.
•Test to make sure the pressure relief valve is operating properly.
Service technician maintenance
Periodically
•Inspect the interior of the water heater.
•Clean the condensate trap and ll with fresh water.
•Clean the air intake lter.
•Check for leaks (gas, water, ue, and condensate).
•Check the system pressure (gas, and water).
•Check ignition and ame rod.
•Check wiring connections.

10
Installation Manual
Troubleshooting
Basic Problems
If there is a problem with the water heater, refer to the following table for possible remedies. For minor problems, turning the water heater o
and then turning back on may resolve the situation. If turning the water heater o and on and attempting the remedies suggested below do not
resolve the problem, contact an authorized technician, licensed professional, or technical support at 1-800-761-0053.
Category Problem Possible Cause(s) What to Do
Initial
operation
Water heater does not ignite
when water is running.
•Are the gas and water pipes connected
properly?
•Check for correct plumbing or crossed piping to
the unit.
•Check the water inlet lter for debris.
Unit attempts to ignite but
fails
•Is there air in the gas line?
•Is the gas supply pressure sucient?
•Turn o the water heater and then turn it back on.
•Have your installing contractor check the gas
supply pressure.
•Ensure the water heater is powered by 120 V-1
PH-60 Hz.
Temperature
Hot water is not produced
when a faucet is opened.
•Are the gas and water supply valves fully
open?
•Is the water supply cut o to the household?
•Is gas being provided by the gas meter?
•Is there enough gas (for LP) in the tank?
•Is the water inlet lter clogged?
•Is the power button turned on?
•Fully open the gas and water supply valves.
•Check the water inlet lter for debris.
•Check the power status of the water heater.
No water is available when a
faucet is opened.
•Is the water supply cut o?
•Is the water heater frozen?
•Are the pipes frozen?
•Open the cold water supply.
•Check if the water heater and/or the pipes are
frozen.
The hot water is not at the
correct temperature. •Is the hot water faucet suciently open? •Fully open the hot water faucet.
Water takes a long time to
become hot after opening
the hot water faucet.
•Have you allowed enough time for the cold
water in the pipes to drain out?
•Even though the unit may be operating properly,
the cold water contained in the piping will need to
ow through the faucet before the hot water can
reach the faucet. Wait for several minutes.
The water is too hot.
•Are the gas and cold water supply valves fully
open?
•Is the water temperature setting appropriate?
•If the cold water supply temperature is too high, it
is possible for the temperature to be higher than
the temperature set on the front panel. Decrease
the water temperature on the front panel.
•If only a small amount of hot water is required, it is
possible for the temperature to be higher than the
temperature set on the front panel. Decrease the
water temperature on the front panel.
•If the cold water supply passes through a solar pre-
heating system, it passes for the delivered water
temperature to be higher than the temperature set
on the front panel.
The water is not hot enough.
•Are the gas and cold water supply valves fully
open?
•Is the water temperature setting correct?
•Fully open the gas and cold water supply valves.
•Check the water temperature setting.
Fluctuation in hot water
temperature. •Is the water inlet lter clogged? •Clean the water inlet lter for debris.