Prity ® Fireplaces and Stoves

FIREPLACES AND FIREBOXES TO BUILD IN

With a water heater

(water jacket)

TECHNICHL DESCRIPTION

The fireplaces of Prity are intended for heating of private houses and public premises using

solid fuel. The variety of models permits the formation of the desired interior with the purpose of

creating coziness, aesthetics and heat comfort. For cooking the technology of embers, in an oven,

on a plate can be used.

Heat power

Volume

of the water

Spatial heat

MODEL

of the

heate, kW

flow, kW

Spatial heat

Dimensions,

Mass,

WJ,

flow, kW

litres

Nominal

Maximum

Fireplace PRITY К1 W8

45x40x76

Fireplace PRITY К1 CP W8

46х44х76

Fireplace PRITY К2CPW10

5,5

50х48х81

Fireplace PRITY К2CPW13

7,5

50х48х81

109

Fireplace PRITY К22CPW10

5,5

50х48х81

Fireplace PRITY S1 W10

5,5

49x46x83

Fireplace PRITY S2 W10

5,5

49x46x83

Fireplace PRITY SК W10

5,5

47х54х82

105

Fireplace PRITY S3 W13

7,5

49x46x93

100

Fireplace PRITY S3 W17

7,5

57x52x87

125

Fireplace PRITY АМ W12

7,5

72х55х82

111

Fireplace PRITY FG W10

7,5

57x53x93

133

Fireplace PRITY FG W15

7,5

57x53x93

136

Fireplace PRITY W17

7,5

65х55х116

133

Fireplace PRITY WD W16

7,5

65x55x78

119

Cooking stove PRITY W10

7,5

93x59x79

113

Cooking stove PRITY W12

7,5

93x59x79

114

Firebox PRITY А W16

65х67х65

113

Firebox PRITY А W20

109x75x79

175

Firebox PRITY М W18

70x58x64

118

Firebox PRITY C W18

15,5

66х57х72

135

Firebox PRITY C W28

66х57х88

161

Firebox PRITY 2C W28

66х66х90

220

Firebox PRITY 3C W28

66х66х90

220

Firebox PRITY AC W20

66x70x88

130

Firebox PRITY ATC W20

109x81x83

188

Firebox PRITY TC W28

109x62x83

206

Firebox PRITY G W21

85x57x65

138

Firebox PRITY G W28

85x57x87

186

Boiler PRITY МА18

57x51x89

136

Boiler PRITY GА26

57x51x107

163

Boiler PRITY GА38

57x51x117

182

The indicated heat powers of the models have been fixed after investigations according to

standardized conditions. Achieving the desired power depends on the selected fuel with the

necessary caloricity and humidity; its subsequent kindling and refueling; the regulation of the

primary and the secondary air as well as the draught; the organizing of effective air heat exchange

etc.

All models are made of basic sheet iron for the body of the fireplace, 2 mm thick, and a plate 3-

4 mm. The water jackets are made of sheet steel 5 mm, 4 mm and 3 mm thick, according to the

respective requirements. They are equipped with a cast iron grate, doors for refueling, ash-pan,

brick-facing, and a valve for adjusting the draught of the chimney. The fireboxes have a thermo

shock glass ceramics pane, and the ovens have a hardened glass pane.

For calculating the necessary power, it must be taken into account that for the heating of one

cubic metre, 25 to 180 Watts are necessary, depending on the exposure, the insulation, the outside

temperature and the wind.

It is known that the correlation between the price and the caloricity of the chosen fuel indicates

that the heating with solid fuel is the most economical method. As a result of the long experience

and the tests carried out in the laboratories of “Prity 95” Ltd., optimum characteristics and 60-80 %

efficiency for all produced fireboxes, stoves and boilers have been achieved.

Specific Models of Fireplaces:

With these models no marked decorative effect is sought, because of which no glass ceramics is

inserted. In return for this it is stressed (emphasized) on their functionalism.

Solid fuel cookers suitable for households which rear domestic animals;

Boilers - they are intended for setting up in ground floor premises with a possibility to

store coal. The boilers are provided with a capillary thermostat for control and regulation

of the air necessary for the burning process. In this way, a uniform and economical

combustion of the fuel is achieved, as the water is heated till a fixed desired temperature,

adjusted beforehand by means of turning the switch of the thermostat. When turning the

switch clockwise the temperature increases, at which the thermostat breaks the primary air

flow off.

INSTALLATION INSTRUCTIONS

The fireplace is placed on a stable horizontal fireproof floor. For protecting the floor a stable

and fireproof base can be used, which shall stick out before the fireplace at least 50 cm in front and

30 cm at the side.

In the radiating area of the fireplace, at a distance of 80 cm around her shall not be there any

objects burnable and damageable by the radiated heat.

Prior to connect (Before connecting) the fireplace to the chimney, consult a skilled worker.

The connecting elements (rosette and smoking pipes) shall be fixed tightly and lasting, so that

they may not get into (enter) the passage section of the chimney. The smoking pipes shall have the

same size as the connecting pipe of the fireplace.

It is advisable that the fireplace work with a separate chimney. If other appliances are connected

to the same chimney, it shall be calculated for that.

Fresh air shall enter (get in) the fireplace at least 4 m 3 /h for each kilowatt from its heat output.

When necessary a flow from adjacent premises or outside air is ensured.

The burning process of the fireplace shall not feel shortage of air on the action of gravitational

or forced aspirations, since this is a prerequisite for insufficient combustion or returning of flue

gases in the premises.

EXEMPLARY DIAGRAMS OF OPERATION

OF A FIREPLACE WITH A WATER JACKET

IN AN OPEN SYSTEM

Open water heating system with an open

expansion vessel and a pump.

Economical open gravitational self-adjusting

water heating system with an open expansion

vessel without pump

EXEMPLARY DIAGRAM OF OPERATION

OF A FIREPLACE WITH A WATER JACKET

IN A CLOSED SYSTEM

1. Manometer 4 bar.

2. Thermometer 120º С.

3. Electric(al) thermostat.

4. Thermal safety valve.

5. Automatic deaerator.

6. Safety hydraulic valve

2,5 bar.

7. Drainage, draining.

8. Closed extension vessel.

9. Filter.

10. Circulation pump.

11. Automatic supplementing group

1,5 bar.

GENERAL RULES AND RECOMMENDATIONS

1. Before the installation building, it is recommended the heat losses to be calculated by a specialist

for the concrete case.

2. The installation must be connected to the atmosphere with an open expansion vessel, when the

system is open.

3. De-aeration of each branch and element of the installation in each moment of its operation has to

be ensured.

4. All of the elements of the installation must be ensured against freezing, especially if the

expansion vessel or other parts of it are located in non-heated premises.

5. In the installations with forced circulation the pump must be provided with UPS

- an

accumulator with a transducer 12 V/220/V50 Hz on autonomous regime.

It is recommended that the circulation pump be switched on and off by a thermostat, duplicated

with a manual electrical switch.

Diagram:

L1 and L2 signal lamps

K- Ordinary switch

T Thermostat

Operating conditions (mode). L1 is on,

the circulation pump runs.

Readiness regime/mode. L2 is on. The pump DOESN'T run.

There is electrical tension.

Emergency operation. L1 and L2 are off.

There is no electrical tension.

6. The first service cleaning of the pump filter must be done immediately after testing the

installation.

7. If an old installation is used, then it shall be repeatedly sluiced to remove the accumulated

(lodged) residue, which would precipitate on the surfaces of the water jacket.

8. Coal with increased sulphur content must not be used and don’t allow the coal get wet.

9. Fresh and wet wood or vegetation shall not be used. The logs shall be stored at least two

years in a dry and airy place.

10. The circulating water shall not be drained out during the non-heating season.

During the 3-4 kindlings it is possible to form condensation on the surfaces of the water jacket.

The forming soot decreases the sudden temperature difference and the quantity of the

condensation.

OPERATION INSTRUCTIONS

The fireplace with a water jacket functions on the principle of a water heating boiler. The

advantage of this kind of heating system is the maximum use of the heat released during the

burning process. With this method the warmth from the firebox is lead away to premises which are

distant and difficult to access for a usual heat exchange, with the purpose of maintaining a uniform

temperature and heat comfort.

Fuel

Use only raw chemical natural wood, as well as wooden briquettes without adhesives.

It is important that the wood be dry. Dry are called those logs which have humidity under 20 %.

This is achieved when they stay in a dry and airy place at least for 2 years. The wood shall be kept

chopped and arranged, as their thickness shall be between 5 and 15 cm.

Why humid wood shall not be used?

The humidity in the wood decreases their warmth when burning. A big part of the heat is

spent on evaporation of the water, and the rest can turn out insufficient to ensure the

necessary heating. For example, 20 kg humid wood can mean 10 kg dry wood and 10

litres water, added to the fire.

The water vapour decreases the combustion temperature and contributes to the formation

of soot which accumulates and forms a black hard layer on the walls of the combustion

chamber, glass ceramics, pipes and the chimney.

The pollution of the environment increases because the gases leave the chimney unburnt.

Kindling

The destination of the kindling is to warm the walls of the combustion chamber, the pipes and

the chimney up to create draught through a stable blazing fire without being necessary to open the

door often to finish its preparation.

1. Before kindling clean the ash off the grate.

2. Open the valves for the primary air and for the flue gases completely.

3. Put two chopped pieces of wood in the combustion chamber, parallel to one another, from

both sides of the grate.

4. Crush a paper and put it on the front part of the grate among the logs. Don’t use glossy or

impregnated paper.

5. Put small dry twigs or sticks on the paper. It is preferable easy burning kindling of

softwood. Arrange the kindling, so that they may not fall down and stifle the arising fire.

Put some finely chopped logs.

6. Kindle the paper. When the paper burns up, close the door of the combustion chamber.

7. Leave the valve of the primary air entirely open, while the flame spread all over the whole

combustion chamber.

The thermo resistant paint, with which the fireplaces have been painted, is dried by compulsion in

the producer’s factories, and during the first one or two kindles it self-bakes and becomes

mechanically stable.

Fuelling with wood

The radiated heat from the fire is not permanent in time, since the logs burn in the best way in

cycles. Cycle is the time from the kindling of the logs put on the embers till their reduction to a new

layer of embers. Each cycle can ensure heating for various periods of time depending on how much

logs and how big they are and how they are fuelled.

The finely chopped logs, flung about crosswise burn more quickly because the entering air is

able to reach all the pieces simultaneously. Such arrangement is suitable when the heat is necessary

to be given off intensively.

To achieve a long stable fire, gather the embers on the grate and put bigger logs compactly on

them. The close and parallel arrangement of the logs prevents penetrating of air and flames among

them and preserves the interior of the pile to burn later. Open entirely the primary air. When the

logs, most outside kindle, decrease the air to achieve the intensity of burning desired by you.

How many logs are necessary depends on the output (power) of the fireplace and the desired

heating. The amount of dry logs to fuel is 0.36 to 0,5 kg per hour for each kilowatt useful heat

output. The smaller number is for drier logs.

Signs of right burning

Burning shall run in the presence of flames till the logs convert into embers. The purpose

is not to allow any smouldering and smoking. The smoke is no normal product during the

burning of the logs, and it is a consequence of bad combustion.

If there are fireproof bricks in the fireplace, they shall maintain their natural colour in

yellow-brown, not in black.

With dried logs and sufficient primary air an immediate kindling must be achieved on

each new refueling.

The glass ceramics of the door (if there is any) must remain clean.

The gases going out of the top of the chimney must be transparent or white. The grey

smoke indicates that there is smouldering or bad burning.

Chimney

The chimney is intended to draw the combustion products out of the fireplace and to throw

them away in the atmosphere beyond (outside the limits of) the abode.

The upward draught or the “pulling” of the chimney is a result of the combination between its

height and the difference in the temperatures of the flue gases and the air outside. The column of

hot flue gases in the chimney has smaller weight than the equivalent column cold air outside, so

that the pressure in the lower end in the warm chimney is smaller than the atmospheric (air)

pressure outside. This quite small difference in the pressures creates the draught.

The lower draught is a prerequisite for difficult kindling or returning of flue gases, and it is

overcome through quick kindling and burning of dry, thin and fast-burning sticks and paper. After

kindling of the fire and warming up of the chimney, its draught increases. For economical regime

and high efficiency after the warming up of the chimney, the draught must be decreased to 5-10 Pa,

so that there may be no return of the flue gases (smoking) with a closed door.

The main causes of insufficient draught are the following:

layering of soot inside the chimney, which decreases its diameter and increases the

resistance of the rising flue gases;

a cracked wall of the chimney or a loose rosette;

loose smoke pipes, or pipes pushed deeply in the chimney, as in this way they decrease the

diameter or plug up the chimney;

The use of a single chimney with a small draught by several stoves on the same level (in

close proximity);

Smoking also appears when the weather outside has suddenly got warmer - The warm

gases from the kindling of the fire can’t escape through the cold chimney. In this case a

bigger amount of quickly burning sticks and paper is used. The same effect takes place

while attempting to kindle a fire on the first (ground) floor, provided the same or an

adjacent chimney is already being used by a fireplace on the top floor;

when the ceiling is not air-tight or there are open windows on an upper floor, the effect

“staircase-chimney” takes place, creating a reverse draught;

When a chimney is located in an area of overpressure caused by a wind.

On right connection, servicing and maintenance the fireplace doesn’t give off smoking

emissions in the premises. If nevertheless this occurs, the premises are aired and the cause of the

filling with smoke must be found out and removed.

Don’t burn: garbage, stuck or painted softwood, plywood or boards of wooden parts, wooden

sleepers or other refuse containing artificial chemical admixtures, since poisons don’t burn, but

only change their composition and when they are thrown away in the atmosphere, they lead to

unpredictable consequences.

Cleaning, maintaining and preservation

During operation the door of the fireplace must be closed. On opening of the door to refuel, the

openings for the primary air are closed and one shall be careful not to drop down fuel and prevent it

from falling out of the fireplace.

The power of the fireplace is regulated with the help of the valves for the primary air and on the

outlet for the flue gases.

The cooking stoves are switched over in regime “baking” through pulling out the valve over the

oven.

Don’t touch the fireplace with your bare hands, while it is hot.

The ash-pan shall be cleaned daily. Don’t throw the ash in plastic vessels.

Clean regularly the passage sections of the flue gases in the fireplace and the pipes.

The painted surfaces are cleaned with a damp cloth. Don’t use cleaning detergents. If you want

to freshen the paint, use a suitable phial of sprayer.

To clean easier the cavities in the cooking stove the movable bottom of the oven is raised.

The glass pane is wiped with a damp towel, and when necessary it can be washed with cleaning

detergents or water. The hardened glass panes are washed and dried when cold.

To prevent the condensation and a possible corrosion, when the fireplace is not operated for a

long time (for example during the non-heating period), it must be cleaned from the ash and

remainders of fuel, and the adjusting elements - open, for a better circulation around and through

the fireplace.

Do dot perform any unauthorized modifications in the design!

During repairs only original spare parts by the producers shall be used.

- The company operates a guarantee and post-guarantee service and can replace water jackets.

- The guarantee is not valid for fireplaces with bulging water jackets, which are a result of

the increased pressure in the system beyond the admissible one on incorrect installation.

- It is recommended that the installation be done by a skilled specialist.

Last update 30.05.07.