DEWHOT 25MJ Gas Geysers Gas Space Heater Instruction Manual

DEWHOT 25MJ Gas Geysers Gas Space Heater

Read these instructions carefully before operating the gas space heater and familiarize yourself with the ap-pliance before connecting it to the gas cylinder. Keep these instructions for future reference.

Important

IF YOU SMELL GAS

1. Turn off the gas supply at the bottle
2. Extinguish all naked flames
3. Do not operate any electrical appliances or your vehicle
4. Ventilate the area
5. Check for leaks as described in this manual
6. If gas smell persists, contact your dealer or gas supplier immediately
7. Do not modify the appliance

BURN-BACK
In the event of a burn-back, where the flame burns back to the jet, immediately turn the gas supply off at the gas cylinder. After ensuring the flame is extinguished, wait for I minute and then re-ignite the appliance as per normal. Should the appliance burn back again, close the gas cylinder and call a registered installer. Do not use the appliance again until the installer has confirmed that it is safe to do so.

GAS-PRESSURE REGULATOR
Only install a LPG or NG low pressure regulator that complies with the SANS 1237 requirements.

GUARANTEE
After installation, please register your product on the Dewhot website (You will need your invoice and Certificate of Compliance (COC) to complete the registration.

Only a registered gas installer can install your gas heater and must comply to SANS 10087-1

This appliance may only be installed by a registered LPG/NG installer.
Registered installers are issued with a card that displays their registration number. Insist on seeing this card and make a note of their registration number.
When they have finished their installation make sure the installer performs an operational and safety briefing with you.
Before you sign off the installation, make sure you also receive your COC.

Installer
This appliance may only be installed by an Installer registered with the South African Qualification and Certification Committee (SAQCC). The appliance must be installed in accordance with the requirements of SANS 10087-l for use with LPG or NG and or any fire department regulations and/or local bylaws applicable to the area.
If in doubt, check with the relevant authority before continuing with the installation. Once an installation is complete you are required to brief, in full, the operational and safety functions of the appliance and installation.

Technical parameters

Gas Pressure

|

2.8 kPa (LPG)

2.0 kPa (NG)

Max Gas Consumption| 0,3 Kg/h
Maximim Room Size| 150m3
Minimum Room Size| 60m3
Rated Voltage| 240V
Rated Frequency| 50Hz
Rated Electric Power| 34W
Unit Size| 480 x 190 x 485mm
Unit Weight| 11.3kg
Packaged Size| 530 x 282 x 550mm
Packaged Weight| 12.4 Kg

Parts diagram

Control panel functions

1. Economy Button
2. Off Timer Set Button
3. Current Room Temperature/Hour Display
4. Minute Digit Display
5. Child Lock Icon
6. Boost Mode Display
7. Set Temperature Display
8. Combustion Condition Display
9. Increase Button
10. Boost Mode Button
11. Auto Mode Button
12. On Timer Setting Button
13. Child Lock Function
14. Room Temperature Icon
15. ECO Display icon
16. ON Timer Icon
17. OFF Timer Icon
18. Set Temperature Icon
19. AUTO Mode Icon
20. Decrease Button
21. ON/OFF Button

Remote control functions

Functions & features

• ECO MODE
  The heater cuts off when the room temperature reaches the set temperature. The heater turns back on in a low output mode when the room temperature drops 2°C.

• BOOST MODE
  The heater cuts off when the room temperature reaches the set temperature. The heater turns back on in full output mode when the room temperature drops 1°C.

• AUTO MODE
  The heater starts up with maximum heat output and then switches to eco mode once the set temperature is reached to maintain room temperature.

• REMOTE CONTROLLED
  Simplicity of adjusting the temperature, timer and turning the applinace on and off by using the remote.

• THERMOSTATICALLY CONTROLLED
  The appliance will automatically turn itself on and off when the room temperature reaches the set temperature. This can be adjusted from 16°C to 30°C in 1°C incremenets.

• CHILD LOCK
  Prevent children or unwanted adjustments by activating child lock and locking the adjustment functions.

• AUTOMATIC IGNITION
  The heater automatically ignites itself once the ON button has been pushed.

• FAN ASSISTED COMBUSTION
  The motor and fan force oxygen into the appliance to fuel the heater more effieciently, decreasing gas consumption and maximizing complete combustion.

• TIMER FUNCTION
  Use the timer function to set the countdown timer to automatically turn your heater on or off in a specified amount of time.

• MULITPLE SAFETY FEATURES
  The heater is equipped with over heat temperature protection, oxygen depletion sensor, flame detection device and a tilt switch.

Safety instructions

DO NOT

• Do not attempt to install this appliance yourself.
• Do not attempt to service or modify this appliance yourself.
• Do not use this applinace in a marine enviroment, such as on yacths or boats etc.
• Do not store flammible substances or chemicals near this appliance.
• Do not spray aerosoles near this appliance, whether its on or off.
• Do not use this appliance outdoors or where you can see damage to any part of the appliance.
• Do not cover the heater with towels or clothing etc.
• Do not block or cover any of the inlet or outlet vents, see installation instructions.
• Do not forcefully disconnect the gas or electronics.
• Do not use the appliance near water and do not operate the appliance with wet hands or feet.
• Do not use in a bathroom or bedroom.
• Do not operate in a room smaller than what is specified, see installation instructions.
• Do not operate without the correct ventilation requirements, see installation instructions.
• Do not operate from a gas cylinder installed indoors.
• Do not unplug the appliance after use until the fan has stopped running, approximately 3 minutes.
• Do not move the heater while it is in use or while the fan is running after use.
• Do not continue to use the heater if you smell gas or strong odurs.
• Do not continue to use the heater if you feel symptoms such as lightheaded, headache, dizzy, weak, confused, shortness of breath.
• Do not use the heater if you feel something may be wrong or suspect it is not functioning correctly.

NATURAL AND LP GAS
Both LP and natural gas are odoured to help detect leaks.
Appliances using LP gas are different from natural gas models. A natural gas appliance can not function safely on LP gas and vice versa.
Do not try to convert a gas appliance from a natural gas to a LP gas appliance.
This could damage the appliance and cause injuries or fires. Never connect the gas appliance to a fuel type that is not in accordance with the appliance’s data table.

WHEN DETECTING A LEAK ON YOUR INSTALLATION
LP gas is twice as heavy as air and may accumulate in low lying areas and cavities.
Before using the heater check for gas leaks. Use a soapy solution to check all gas fittings and connections. Bubbles indicate a leak.

1. Do not attempt to find the cause yourself and turn off the gas supply.
2. Do not ignite any appliance.
3. Do not touch any electrical switch.
4. Evacuate the house immediately with your family and pets, DO NOT start your vehicle.
5. Leave the doors open for ventilation and contact the gas supplier, registered LP Gas Installer or Fire Department.
6. Stay away from the house (or building) until the service call has been made, the leak is fixed and the space has been declared as safe.
7. Ask the installer to show you where the gas shut-off valve is and how to use it.
8. Turn off the manual shut-off valve if the gas appliance has been subjected to overheating, fire, flood, physical damage or if the gas supply fails to shut off.

WARNING
Never use an open flame to test for gas leaks as this could result in property damage, personal injury and or death.

Installation instructions

1. Make sure your heater is connected to the correct gas type before use.
2. Ensure the heater is plugged into a reliable electrical source matching the power requirments of the heater and in compliance with local electrical laws.
3. Ensure your heater has been installed by a qualified professional.
4. Ensure the heater has not been installed in an existing fireplace.

IMPORTANT
The heater should not be installed near flammible materials. It should be at least 1.5 meters away from curtains or other potential hazards. Keeping in mind wind may blow curtains towards the heater.
The heater should be at least 15cm clear of side walls and should not be operated where there is a draft from wind.

VENTILATION REQUIREMENTS

• Irrespective of room size, due consideration should be given to the fact that gas appliances use oxygen from the surrounding air to fuel the flame and this oxygen needs to be replenished through ventilation. You should never use any gas appliance in a sealed room. Always consider using ventilation where permanent ventilation has not been installed.
• 25MJ Heaters should not be used in rooms smaller than 100 meters cubed without ventilation. This room size is approximately 6.5 x 6.5 x 2.4m
• If the room size is not larger than 100m3 you will require permanent ventilation.
• Two vents of 163cm2 should be installed if the room is smaller than the specified size, one vent at high level one vent at low level.
• 15MJ Heaters should not be used in rooms smaller than 60 meters cubed without ventilation. This room size is approximately 5 x 5 x 2.4m
• If the room size is not larger than 60m3 you will require permanent ventilation.
• Two vents of 163cm2 should be installed if the room is smaller than the specified size, one vent at high level one vent at low level.
• A window is not considered permanent ventilation.

GAS HEATER LOCATION
The heater is intended to installed as a freestanding, portable unit. Its portability is restricted by the number of gas outlet points installed.
It should not be installed within 1.5m of any potential flammable hazards.
It should installed at a minumum of 15cm from side walls.
The heater and the gas cylinder should be installed according to local and national gas and electrical regulations. You should always receive a Certificate of Compliance (CoC) for your installation

GAS SUPPLY
Ensure the gas type matches specification table.
Ensure there is sufficient gas pressure (2.8kpa) and pipe size.
Ensure the gas line is equipped with a shut off valve.
A soapy solution must be used to check all connections and fittings for gas leaks. The CoC issued should be signed.

ELECTRICAL CONNECTION

POWER CORD
Electrical connections and wiring must comply with local and national standards.
220 V/50HZ is the electric power supply requirement.
We recommend installing an electrical leakage breaker.
Keep the excess power supply cord on the outside of the gas heater.

WARNING
Before servicing the gas heater, turn off the electrical power at the plug or circuit breaker. Failure to do so could result in electrocution.
Label all wires prior to disconnecting them when servicing controls. Wiring errors can cause malfunctions.

Operation instructions

TURNING ON THE HEATER
Once the gas and power have been connected the heater will go into standby mode, use the ON/OFF button to turn on the heater.
Use the ON/OFF button again to turn off the heater after use. Do not unplug the heater until the fan has stopped.

DEFAULT/AUTO MODE
When turning on the heater it will enter the default auto mode where the preset temperature is 20°C.

SET THE TEMPERATURE
Use the up or down button to adjust the temperature from 16°C to 30°C in 1°C increments.

AUTO MODE
In auto mode the heater will put out its maximum amount of heat and then turn to Eco mode once the room temperature reaches the pre set temperature.

BOOST MODE
In Boost mode the heater uses its maximum heat output to reach the set temperature, once there the heater will turn off and only turn back on to maximum heat when the room temperature drops by 1°C.

ECO MODE
In Eco mode the heater will operate with a reduced heat output and turn off once the room temperature reaches the set temperature. The heater will only re-start on its reduced heat output when the room temperature drops by 2°C.

CHILD LOCK
To enter child lock mode, press the ON timer and OFF timer buttons at the same time for more than 3 seconds. You will see the child lock indicator light up on the display. Except for the ON/OFF button, all the other buttons will no longer function.
When the ON/OFF is pressed under the lock function, the heater turns off and will display :00, all other buttons will still not function.
To exit the child lock function, press the ON timer and OFF timer buttons at the same time for more than 3 seconds. The child lock icon will disappear and the all the other buttons will function normally again.

AUTO TURN ON TIMER FUNCTION
With the heater in Standby mode (turned off), press the timer on button and the timer on indication icon will light up. The timer indicator will show 00:00 and the hour indicator will flash.
Use the up and down buttons to set the hour by 1 hour increments from 0-23hrs. Press the on timer button again to confirm the hour setting and the minute indicator will start flashing.
Use the up down button to adjust the minutes in increments of 5 minutes from 0-55 minutes.

Press the on timer button again to set the clock and wait a few seconds. Once it is set, it will begin to count down and the heater will turn on when the timer reaches 00:00.
To cancel the timer function press and hold the timer on button for more than 5 seconds, the display clock will return to 00:00.

AUTO TURN OFF TIMER FUNCTION
With the heater turned on, press the timer off button and the timer off indication icon will light up. The timer indicator will show 00:00 and the hour indicator will flash.
Use the up and down buttons to set the hour by 1 hour increments from 0-23hrs. Press the on timer button again to confirm the hour setting and the minute indicator will start flashing.

Use the up down button to adjust the minutes in increments of 5 minutes from 0-55 minutes.
Press the off timer button again to set the clock and wait a few seconds. Once it is set, it will begin to count down and the heater will turn off when the timer reaches 00:00.
To cancel the timer function press and hold the timer off button for more than 5 seconds, the display clock will return to 00:00.

PLEASE NOTE THIS APPLIANCE IS NOT INTENDED TO BE USED BY CHILDREN OR PEOPLE WITH REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES OR LACK OF EXPERIENCE OR KNOWLEDGE OF THE APPLIANCE.

Maintenance

• Do not operate the appliance with the panels or covers removed. Always unplug the heater before cleaning or servicing it.
• Regular visual inspections should be done by the owner, this visual inspection should consist of looking for any physical damage to the cover, damage to the electrical cable, damage to the display screen or any other part of the heater, as well as a gas leak test which can be done with a spray bottle and soapy water on the gas piping and connections to the heater.
• If you notice any black soet occuring around the hot air outlet, discontinue use immediatley and log a service call.
• When the heater is cooling down after use or heating up during use, occasional clicking sounds may be heard, this is normal. However, continuous metallic noises, grinding sounds, the smell of gas or any of the symptoms listed on the fault chart should be investigated immediatley and the heater should not be used.
• If you suspect something to be wrong with the heater, do not use it and call your local installer or supplier to have the unit inspected and serviced.
• Service calls, general maintenance and certain repair work should always be carried out by a qualified professional and may not be covered under warranty.
• Faults caused by external factors, such as but not limited to, will not be covered under warranty: dirty gas, too much or too little gas pressure, operation errors, water damage, physical damage or any other external factor that did not fail as a result of mal-manufactoring.
• The heater should be inspected by a qualified professional every year. This inspection should consist of gas pressure tests, to ensure normal function of the regulator, a visual flame inspection to ensure there is complete combustion with the flame.
• A bright yellow flame is considerded very dangerous and the cause for lack of air supply to the burners should be investigated and rectified immediately. A flame lifting off the burner indicates incomplete combustion and the cause for too much oxygen to the burners should be investigated and rectified immediately.
• The installer should during this annual inspection, check that any permanent ventilation openings have not been closed off.

Cleaning

GENERAL

• Turn the appliance off and disconnect the power supply before cleaning.
• Clean the appliance and remote with a damp soft cloth only. Gently wipe the surfaces of the appliance and any remaining moisture with a dry soft cloth.
• The air filter of the appliance should be cleaned at least monthly or more depending on how much dust accumulates on the filter during the cold season.
• Do not store household items near or on top of the appliance.
• Filters should be cleaned on a monthly basis.
• Do not scrub the appliance with a brush.
• Use only water, any chemicals can damage the surface of the appliance.
• Do not remove any labels, including the rating table when cleaning or servicing.
• Do not splash water on the remote controls when cleaning.

CLEANING THE AIR FILTER

• Turn the appliance off and disconnect the power supply.
• Unscrew the air filter and slide the filter out.
• Do not tap the filter as it may damage it. Use a vaccum to clean the filter.
• Put the filter back in the same way you removed it If you don’t perform regular maintenance the heater can start operating poorly which can cause carbon monoxide poisoning or other potentially hazardous conditions

VACATION AND EXTENDED SHUT-DOWN
If the heater is left for an extended period of time, the power and gas to the appliance should be turned off.
geyser needs to be serviced and checked.

Troubleshooting

Fault| No display| Ignition failure| Flame failure| Gas smell
---|---|---|---|---
Not plugged in| |  |  |

Main power failure

| |  | |

Gas pressure

|  | | |

Air lock

|  | |  |

Room too large

|  |  |  |

louvre blocked

|  |  | |

Blocked filter

|  |  | |

Air filter blocked

|  |  | |

Gas Leak

|  | |  |

Child lock set

|  | |  |

Flat remote battery

|  |  |  |

Wrong gas type

|  | | |
Room not Remote                           Weak

heating **controller not airflow**

working

|

Solution

---|---
 |  |  | Plug the cord in and turn power on
 |  |  | Re-ignition when power is on
 |  |  | Turn on gas/check pressure
 |  |  |

Repeat ignition

|  |  |

Check page 5

|  |  |

Remove obstruction

|  |  |

Clean the filter

|  | |

Remove obstruction

 |  | | Isloate gas supply, call service
 |  | |

Cancel lock function

 | |  |

Replace batteries

 |  |  | Check and use the correct gas type

Troubleshooting

E1

Flame dectection circuit faulty

| Appliance detects flame before igniton or before turning off| Shut off gas supply and contact installer
E2

Flame failure

| Ignition failure or flame failure| Check gas cylinder and gas type

Check lock function is off If igniton fails 5 times contact your installer

E3

Tilt switch fault

| The heater tilted over more than 45 degrees| Check the appliance is upright

call your installer if repeated

E4

Anti-burn protection

| Over heating or damage to the anti-burn fuse| Contact installer
E5

Faulty room temperature sensor

| Sensor is disconnected or damaged| Contact installer
E6

Faulty fan motor

| Fan is disconnected or faulty| Contact installer
E7

Faulty solenoids

| Solenoids disconnected or damaged| Contact installer
E8

Gas valve faulty

| Gas valve is disconnected or damaged| Contact installer
Error Code| Reason| What To Do
---|---|---
E9

Faulty relay

| Damage to the relay| Contact installer
E11

Faulty temperature sensor

| Temperature sensor disconnected or damaged| Contact installer
E12

Faulty theromcouple

| Oxygen shortage or damage to the thermocouple| Clean the air filters Check if the room is correctly ventilated (see manual) Contact installer if repeated
E13

Over heat protection

| Combustion chamber has reached more than 100 degrees| Clean the air filter and louvre
E20

Gas valve leakage

| The appliance detects a flame before the solenoids open| Contact installer

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