Belief Yfy-6e/1 Parts list manual

Belief

6KW E-Gas Hot Water & Warm Air Integrated Heater

Technical Description, Installation, Operation and Maintenance Instructions

Production Type Order No.

Liquefied gas electric heating DC12V/220VAC 4W2005 12C11

Version: Oct 15, 2018

Belief

Foreword

Thank you for using the Belief parking heater

This manual describes the technical description, installation, operation and maintenance

instructions for the parking heater. To ensure the correct use of the heater please read this manual

carefully before installation and use. Please keep it properly after reading it. For review.

Note:

●The contents of this manual are subject to change without prior notice, but the instructions

are guaranteed to be consistent with the products purchased.

●we try our best to express the problems that users should know through the instructions. If

you have questions or find something wrong, please contact us directly.

●When the user unpacks for the first time, check the main unit and accessories against the

packing list. If you find any problems, please contact the dealer immediately.

●If there is a problem in use, please contact the company's marketing department or our

authorized customer service station. We will be happy to help you.

Please carefully save the after-sales service warranty sheet and provide feedback as required.

This sheet is the only valid proof of after-sales service.

Note:

Must be installed and used in accordance with the requirements of the manual to ensure long-term use of the

product!

2018 10 15 Edition Subject to Change

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1.Application

YFY-6E/1 Model gas heater (hereinafter referred to as

heater) is a special heater for caravan that integrates

hot water and warm air. This heater cannot be used in bus

or dangerous goods carriers.

2. Main Technical Data

Table 1

3.Function

The heater is a hot water and warm air integrated machine,

which can provide domestic hot water while heating the

occupants. This heater allows use during driving. This

heater also has the function of using local electricity

heating.

In hot water warm air work mode, this heater can be used

to heat both the room and the hot water. If only hot

water is needed, please choose hot water working mode.

When the ambient temperature is below 3°C, please empty

the water in the water tank to prevent freezing of the

water tank.

There are three energy options to choose from:

-- Gas Mode

Heater automatic adjust the power。

--Electrical Mode

Manually select the 900W or 1800W heating mode according

to the power supply capacity of the RV camp.

--Hybrid Mode

When the power demand is low (for example, maintaining

the room temperature stage), the electrical heating is

preferred. Until the city electricity cannot meet, the

gas heating is started, and the gas heating function is

turned off first in the power adjustment phase.

In hot water working mode，gas mode or electrical mode

is used to heat the tank。The tank temperature can be

set to 40°C or 60°C.

-- Gas Mode

The heater operates at the lowest power. Stop heating

immediately after reaching the set temperature.

--Electrical Mode

Manually select the 900W or 1800W heating mode according

to the power supply capacity of the camp site.

4. Safety Instructions

The gas obtained from the liquefied gas tank is

mandatory to be in a gaseous state. Liquefied gas is

not allowed to avoid danger.

If a gas leak occurs or smells of gas:

--Immediately extinguish the open flame

--Open doors and windows

--Close all valves, liquefied gas tanks

--No smoking

--Do not operate any electrical switches

--Ask the professional to thoroughly check the gas

system

Rated Voltage

DC12V

Operating Voltage Range

DC10.5V～16V

Short-term Maximum Power Consumption

5.6A

Average Power Consumption

1.3A

Gas Heat Power (W)

2000

4000

6000

Fuel Consumption (g/H)

160

320

480

Gas Pressure

30mbar

Warm Air Delivery Volume m3/H

287max

Water Tank Capacity

10L

Maximum Pressure of Water Pump

2.8bar

Maximum Pressure of System

4.5bar

Rated Electric Supply Voltage

～220V

Electrical Heating Power

900W

1800W

Electrical Power Dissipation

3.9A

7.8A

Working (Environment) Temperature

-25℃～+80℃

Working Altitude

≤1500m

Weight (Kg)

15.6Kg

Dimensions (mm)

510×450×300

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5.Heater Installation

The typical installation of the heater is shown in

Figure 1.

★ Must be installed and repaired by professionals

authorized by the company!

The company does not bear any responsibility for the

following acts:

--Modified heater and accessories

--Modification of exhaust lines and accessories

--Do not follow the operating installation instructions

--Do not use our company's special accessories

Figure 1

1-LCD control switch

2-External temperature sensor

3-Recirculating air inlet (minimum 150cm2)

4-Heat pipe

5-Heat outlet

6-Smoking cowl

Figure 2

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Heater installation Figure 3.

The heater installation location should be selected from

load-bearing floor, double floor or underfloor.

If there is no suitable floor, you can first make a load

bearing surface with plywood.

★The heater must be firmly fixed to the mounting

surface with screws to prevent damage to the gas

pipeline during driving and cause danger.

Depending on the actual installation, may only install

three screws. Two die-cast aluminum fixing screws are

fixed then choose a plastic right angle to fix it.

To ensure that the heater evenly distributes heat, the

heater should be installed in the center as much as

possible to ensure that the heating circuit is equal

long as possible.

No cover is allowed to add to the heater surface.

Figure 3.

1_12V Power cord 2_LCD switch Lead wire 3_LCD switch back cover 4_LCD switch bracket 5_Cross head self-

tapping nail M3*10 6_LCD control switch 7_Cross countersunk head flat tail self-tapping nail M3*6 8_Cross

head self-tapping ST5*25 9_Heater 10_Controller cover 11_External temperature sensor lead wire 12_External

temperature sensor 13_φ8 Elbow transition fitting 14_Rubber strip clamp 15_ Cross pan head self-tapping

screws ST5×16 16_φ8 Straight transition fitting 17_ Precision tube 18_ Fitting nut M14*1.5 19_ Ferrule

20_φ10 Hose (gas) transition fitting 21_φ10 Steel (water) pipe elbow transition fitting 22_ Hose(water)

transition fitting 23_ Intake pipe mounting clamp 24_ Cross pan head tapping screw ST3.5×25 25_ Air intake

pipe 26_ German type clamp 27_ Exhaust pipe 28_Sealing rubber spacer 29_(Exhaust pipe) clamp 30_Intake and

exhaust combine cowl 31_Intake and exhaust combine cover 32_Air outlet 33_Hot air tube 34_ Bellows buckle

35_T-fitting 36_φ60 connecting pipe 37φ60 elbow fitting A-connect to 12V Battery B- connect to gas adjust

valve C- connect to water equipment D-connect to system water tank E-hook，clamp LCD switcher cord

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The size with* is the smallest size, leaving enough

space to connect accessories such as gas and water

pipes.

To prevent the danger from heater accidentally

loosening, the upper cover of the heater compartment

is screwed to the upper cover (Figure 4-1). Next to

the installation location it is necessary to install a

strong partition strip in front of the heater,

perpendicular to the direction of travel. Above the

floor height180mm can be attached to a septum (minimum

30*50mm).

Heat sensitive objects and flammable objects should be

placed away from the heater.

★ The exhaust cowl must be on the side wall or

ceiling.

In the exhaust cowl installed area，there is no

ventilation window in the range of 300mm, and there is

no refueling port or tank respirator in the range of

500mm.

The exhaust cowl is mounted below the window that is

close to or openable. A window switch should be

installed to ensure that the heater is turned off

automatically when the window is opened.

Air Inlet Hose Installation

The exhaust pipe is pass through the intake pipe.

The length of the intake and exhaust pipe is as shown

in Fig. 6, and the shortest is 60cm and the longest is

100cm. The exhaust cowl is only allowed under the

exhaust outlet 20cm.

After the intake and exhaust pipes are pierced from

the through holes, they must be cut short, and the

exhaust pipes are slightly shorter than the intake

pipes. Avoid excessive expansion or tension on the

exhaust pipe.

Figure 4

Figure 7

Figure 6

Figure 5

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The length of the intake and exhaust pipes is 100 cm

to 200 cm, as shown in Figure 7. The piping must be

arranged in the ascending direction。

The Exhaust Cowl （air inlet and outlet）Installation

Select a flat mounting surface so that combustion air

can enter from all sides. Drill one hole of φ83. Seal

(Fig. 8-8), with the plane facing the exhaust cowl.

Wear the fixing clip before installing the exhaust

pipe (Figure 8-3). Pay attention to the installation

of the smoke cap upwards。

20mm at the end of the exhaust pipe should be

compressed, do not straighten. Insert the exhaust pipe

into the exhaust cowl interface（Figure 8-10），as

deep as possible。Try to fix the clips on the top,

tighten.

Place the air intake pipe (Figure 8-2) over the

exhaust cowl tooth (Figure 8-11). Set on the fixed

clip（Figure8-7）, tighten.

Secure the exhaust cowl with 6 screws (Figure 8-9).

Use 2 screws to fix the exhaust cowl.

Fix the exhaust pipe on the side wall with mounting

clip.

Connect Air Inlet Pipe to The Heater

20mm at the end of the exhaust pipe should be

compressed, do not straighten.

Try to insert the exhaust pipe on exhaust port as deep

as possible。fix the clip on top, tighten.

Place the air intake pipe (Figure 9-3) over the air

inlet port (Figure 9-5). Set on the fixed clip

(Figure9-6）, tighten.

Warm Air Intake

The warm air intake is drawn in by the heater. There

must be a total area between the room and the heater

not less than 150cm2 opening.

Ensure that the warm air intake is not contaminated by

the engine or heater exhaust, if necessary, with

structural isolation measures.

Warm Air Distribution

Most of the warm air is imported into the floor area

of the living compartment through the bellows.

The four air outlets on the heater are connected to

the φ65 bellows. Use only pressure piping that meets

the quality requirements of the Belief. Other pipes

Figure 10

Figure 11

Figure 8

Figure 9

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that do not meet our quality standards (especially

wind resistance, pipe diameter and number of ripples)

shall not be used. If the warm air duct must withstand

a considerable amount of bending immediately after the

hot air outlet of the heater in a limited space, we

recommend using a 90° elbow (Figure 3-37). This elbow

can be connected to a diameter of mm hot air duct.

In the case where the length of the pipe is less than

2 meters, the air outlet cannot be installed at a

height higher than the connection of the warm air

duct. When the pipe length is less than 50cm, the pipe

must be siphon between the connector and the outlet.

These measures prevent the undesirable heating caused

by (fairing effect) convection of the vehicle during

summer operation.

★The warm air pipe must be firmly inserted into the

connection port.

To get the best warm air distribution, Belief

recommends using 4 warm air outlets for the heater.

If only three warm air outlets are required, then a

lower warm air outlet must be selected to seal.

★ The cross section of the heater duct must not be

reduced due to pipe connections or the analogue.

Gas Connection

The heater operating pressure must be in compliance

with a 30 Mbar liquefied gas supply.

When the gas pipe is cut off, clean the port flash and

burrs.

The paving of the pipe must make the heater easy to

disassemble for maintenance work.

Use high-pressure air to purge internal debris before

installing the gas pipe.

The turning radius of the gas pipe is not less than

R50, and it is recommended to use elbow pipe to pass

the joint of right angle.

★ The gas interface (Figure 13-2) cannot be truncated

or bent.

Before connecting to the heater, make sure that the

gas line is free of dirt, shavings, etc.

The gas system must comply with the technical,

administrative, and legal regulations of the country.

Anti-collision safety valve (optional)

To ensure safety during driving, it is recommended to

install a crash safety valve that must be installed

after the liquefied gas tank regulator. when Impact,

tilting, the anti-collision safety valve automatically

cuts off the gas line.

Connecting Water Pipe

The water tank can be supplied with a pressure pump or

immersion pump with a pressure of 2.8 bar.

If the tank is connected to a centralized water supply

(rural or urban connection), or if a high-pressure

pump is used, a pressure reducer must be used, which

will prevent pressures above 2.8 bar.

★ The temperature rises and expansion of the water

before the pressure relief valve is triggered may

Figure 12

Figure 13

Figure 14

To heater

To liquefied gas

pressure regulating

valve

Reset button

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result in pressures up to 4.5 bar (may also occur with

the immersion pump). Connected to the water tank and

safe/the water pipe of the drain valve must be safe

for drinking water, withstand pressure (up to 4.5 bar)

and heat-resistant water up to 80 °C.

If an immersion pump is used, a check valve must be

installed between the pump and the first branch

(Figure 15-1). Observe the flow direction when

installing the check valve.

Anti-freezing automatic waterproof device (Figure 15-

4, optional), a mechanical safety / drain valve. When

there is a danger of frost it will automatically drain

the water from the tank through the scupper. If there

is excessive pressure in the system the pressure will

be automatically released intermittently through the

pressure relief valve (Figure 15-8, optional).

External Temperature Sensor Installation

Install inside the vehicle and measure the room

temperature. The sensor installation location is

determined by the RV manufacturer based on the

specific conditions of the vehicle. When selecting the

installation location, please note that the external

temperature sensor should not be subjected to direct

heat radiation.

For optimum room temperature control, an external

temperature sensor is installed above the entrance

door.

Make sure the external temperature sensor is always

installed on the vertical wall. There must be free

flowing air around it.

Drill a hole with a diameter of 10 mm. Single wire

terminal passes through the opening from the back and

connect the end of the cable to the sensor with an

insulated connector plug (no need to observe

polarity). Slide into the external temperature sensor

and connect the two ends of the cable and the two

insulated connectors to the heater electronics (if

necessary, extend the cable to a maximum length of 10

meters, 2 x 0.5mm2 cable).

The external temperature sensor provided must always

be connected or the heater will switch to malfunction.

LCD Control Switch Installation

The gas heater must be operated with a dedicated LCD

switch. See the relevant instructions for details.

Electrical Connection

Lay the wires to avoid scratches. If there is a sharp

edge, if the metal panel is threaded, use a lead

bushing or edge protection accessory.

The connector cable must not be attached or in contact

with metal surfaces, exhaust pipes or hot air ducts.

Figure 16

Figure 15

Figure 17

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The electrical connector is located below the

controller cover. The controller cover can be removed

by pressing and simultaneously sliding in the

direction of the arrow.

When removing or installing the controller cover, make

sure that the connecting cable is not pulled out or

squeezed.

1-DC12V positive 2-DC12V negative

3-Fuse 4-Window Switch

5-External Temperature sensor

6，7- Control switch

When the window switch is not installed, the short

connecting wire cannot be removed.

All cables connected to the heater must be hung in the

direction of sagging. This will prevent condensate

water slipping off from the connector cable and into

the heater.

The connector cable and plug must be free of force.

Bundling connector cable (See Figure 20), attach it to

the housing with a cable tie to eliminate tension.

all cables must be securely connected and must not be

loose or disconnected due to vibrations, causing a

fire hazard!

DC12V Power Supply

the heater's electrical wiring, switches, and control

equipment must be in locations that would not

adversely affect its operation under normal operating

conditions.

The heater has reverse polarity protection. If the

controller is not connected correctly, the LED

indicator will not work.

To ensure the best power supply, the heater must be

connected to the vehicle power supply (or battery)

protected by the fuse (10A) with a 2 x 2.5 mm2 cable

(2 x 4 mm2 for lengths over 6 meters).

If necessary, the voltage drop of the power supply

line must be considered. Connect the negative line to

the main ground line.

If the heater is directly connected to the battery,

the positive and negative lines must be protected.

do not connect other power consuming devices.

Figure 18

Figure 19

Figure 20

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Figure 21

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6. Operational Precautions

Gas heating is not permitted during refueling or in

confined spaces (closed parking lots, workshops or ferry

cabin).

Regularly check that the intake and exhaust pipes are

in good condition and that the fixing is reliable,

especially after a trip. Also check the fixing of the

intake and exhaust pipes and the exhaust cowl.

When a black smoke occurs，must be inspected and repaired

by professionals authorized by the company!

Make sure that the exhaust pipe at the exhaust cowl and

intake pipe are unobstructed, and there are no

obstructions such as snow mud, ice accretion, and leaves.

The warm air outlet and the circulating air inlet are

unobstructed to prevent the heater from overheating.

Under overheating the overheat switch will immediately

cut off the gas supply.

If the gas heater is to meet the heating needs during

driving, a safety shut-off device should be installed.

★If without a safety shut-off device，the liquefied gas

tank valve must be shut off before the driving。

12V Fuse

replace only with the exact same fuse T10A.

～12V Fuse

★ Fuse and Wire harness must be replaced by

professionals authorized by the company。

★ All power must be disconnected before opening the

control enclosure.

fuse specification: T10A slow fusing

~220V Overheat Protection

The electrical heating function has a mechanical

overheat protection switch.

If the 12V power supply is interrupted during heating

or after the heating process, the heater residual heat

triggers the overheat protection switch.

After the water tank temperature has dropped, remove the

controller cover and press the reset button to reset the

overheat protection switch.

Figure 22

Figure 23

Figure 24

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7. Operating Instructions

Please read the operating instructions carefully

before proceeding.

Start the Heater

Use a dedicated LCD switch to operate.

the main unit heating uses gas, electric, hybrid mode,

heating water tank or not heating water tank are set as

needed.

Check the power supply capacity of the RV camp and select

the 900W (3.9A) or 1800W (7.8A) working mode.

--Check if the exhaust cowl is unobstructed

--Opening liquefied gas tank valve

-- Water tank filled with water when needed

Switch Off the Heater

--Use a dedicated LCD switch to operate.

- After the heater is turned off, the combustion-

supporting fan and the heating fan will continue to

operate for a few minutes depending on the temperature

of the furnace.

In case of freezing hazard, the water tank must be

emptied.

--Close the circulating water pump

-- Turn on the hot water tap in the kitchen and bathroom

★ Check the water with a 10L bucket to ensure that the

tank is empty.

the liquefied gas tank valve must be shut off when the

heater is not in use for long time or before driving.

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6. Failure

6.1 General Failure Handling

6.1.1 During the use of the heater, it may appear that

it cannot start normally or turn off itself after

starting and is in the fault lock state. At this time,

the heater can be turned off for more than 5S and restart.

6.1.2 The heater may cause circuit failure due to the

following reasons: the connector is rusted, the poor

contact, the plug is incorrect, the wire or fuse is

rusted, the battery pile is rusted, etc.

Pay attention to inspection, maintenance and prevent

these phenomena from occurring during use.

6.1.3 When the following conditions occur, it can be

handled and eliminated by the user:

●The heater does not start after the power is turned

on and the LCD switch screen does not light. The reason

is that the fuse is open, or the wiring is wrong. In

addition, check whether the plug on the LED switch lead

wire is properly connected to the host.

6.2 Fault Lock Status

6.2.1 The fault generated by the heater is indicated

by the fault code on the LED switch.

6.2.2 The faults can be eliminated according to the

methods listed in Table 2.

Fault Lock Status Debug Method

Fault

Code

Fault Name

Fault Debug Method

Overvoltage fault

Check vehicle power supply system

Under voltage fault

Check vehicle power supply system

Warm air outlet temperature sensor disconnection