Fagor HVG-20/21, HVG-2-10/11, HVG-2-20/11, HCG-6/11, HCG-10/11 Technical Manual

TECHNICAL MANUAL

GAS OVENS

HVG and HCG

NOVEMBER 2001

FAGOR

Industrial S.Coop.

2

INDEX

No. Description page

1 Models and dimensions 3
2 Characteristics 7
3 Location 9
4 Installation 10

Electrical
Water inlet
Drain
Gas inlet

Exhaust gas outlet

Transformation to different gases

5 Control panel 12
6 Functional diagrams 14
7 Figures 21
8 Electrical and assembly diagrams 27
9 Preventive maintenance 33
10 Anomalies 36
11 Parameters and regulations 41
12 Recommended parts 47

3

1 MODELS AND DIMENSIONS

fig 1

fig 2

4

fig 3

5

fig 4

fig 5

6

fig 6

A.- Soft water inlet RG ¾”.
B.- General dra in RG 1”.
C.- Electrical supply inlet connector.
D.- Drain cleaning plug.
E.- Gas inlet RG ¾”.

7

2 CHARACTERISTICS

MODEL HVG-10/11

HVG-10/21

HVG-2-10/11

HVG-20/11

HVG-20/21

HVG-2-20/11

Width X 1060 1180 1060 1180
Depth Y 965 1170 965 1270
Height without chimney W 925 925 1635 1635
Height with chimney Z 1290 1290 2000 2000
Width U 650 770 650 770
Depth V 535 740 535 740

EXTERNAL

DIMENSIONS

mm

Depth Gas R 600 800 600 900
Net weight (Kg.) 210 275 320 430
Electrical power Kw 0.4Kw 0.4Kw 0.6Kw 0.6Kw

Hose

section

2x1,5+T

Fuse Int.

General

10ª

Supply

voltage

220-240V

1N

50-60Hz

Differential

Device

30Ma

Kcal/h (Hs) 34,400 39,560 44,720 72,240

BTU (Hs) 136,500 157,000 177,500 286,700

Gas power

Kw. (Hi) 40,000 46,000 52,000 84,000

Kg/h (29mb)Butane (G -30) 3,330 3,830 4,330 6,990

Kg./h (37 mb) Propane (G-31) 3,280 3,770 4,265 6,890
m³./h (20 mb) Natural gas (G-20) 4,235 4,870 5,500 8,890
m³./h (25 mb) Natural gas (G-25) 4,555 5,170 5,665 9,840

m³./h (8 mb) City gas (G-110) 000 000 000 000
m³./h (8 mb) City gas (G-130) 000 000 000 000

Nominal

consumption

m³./h (8 mb) City gas (G-150) 000 000 000 000

Hot air 90 90 90 90

Performance %

Steam (%) 85 85 85 85

GN 1-1 10 20 20 40

Max. no. trays

GN 2-1 - 10 - 20

Maximum load weight in kg 50 100 100 200

Approximate water consumption (litres/hour) 30 30 30 50

Water inlet pressure Kg/cm 0.5---8

8

MODEL

HCG-6/11 HCG-10/11

HCG-10/21

HCG-2-10/11

HCG-20/11

HCG-20/21

HCG-2-20/11

Width X 900 900 1020 900 1020
Depth Y 965 965 1170 965 1170
Height without chimney W 695 925 925 1635 1635
Height with chimney Z 1060 1290 1290 2000 2000
Width U 650 650 770 650 770
Depth V 535 535 740 535 740
Depth Gas R 720 720 920 720 920
Depth chimney S 380 380 450 380 450

EXTERNAL

DIMENSIONS

mm

Width chimney T 370 370 430 370 430
Net weight (Kg.) 135 165 225 275 380
Electrical power Kw 0.40Kw 0.40Kw 0.40Kw 0.60Kw 0.60Kw

Hose Section 2x1.5+T

Fuse Int.

General

10A

Supply voltage

220-240V

1N

50-60Hz

Differential

Device

30mA

Kcal/h (Hs) 12,000 16,340 21,500 26,660 36,120

BTU (Hs) 47,800 64,850 85,300 105,800 143,300

Gas Power

Kw. (Hi) 14,000 19,000 25,000 31,000 42,000

Kg/h (29mb)Butane (G -30) 1,165 1,580 2,080 2,580 3,495

Kg./h (37 mb) Propane (G-31) 1,150 1,560 2,050 2,540 3,445
m³./h (20 mb) Natural Gas (G-20) 1,480 2,010 2,645 3,280 4,435
m³./h (25 mb) Natural Gas (G-25) 1,355 1,970 2,050 2,540 4,310

m³./h (8 mb) City Gas (G-110) 000 000 000 000 000

m. ³/h (8 mb) City Gas (G-130) 000 000 000 000 000

Nominal

consumption

m. ³/h (8 mb) City Gas (G-150) 000 000 000 000 000

Hot air 90 90 90 90 90

Performance %

Steam (%) - - - - -

GN 1-1 6 10 20 20 40

Max. no. trays

GN 2-1 - - 10 - 20

Maximum load weight in kg 30 50 100 100 200

Approximate water consumption (litres/hour) 15 15 30 30 35

Water inlet pressure Kg/cm 0.5---8

9

3 LOCATION

It is recommendable to install the extractor hood to expel fumes to the exterior
(see fig 7)

On the left -hand side, there must be a minimum space of 50 cm between the oven and
the next appliance HVG. (see fig 8)

Likewise, the over must not be affected by the steam or heat from other appliances. The
rear panel must be in place at all times.

fig 7

fig 8

10

4 INSTALLATION

Before proceeding to install the equipment, make sure that the type of gas set for the
oven coincides with the gas supplied in the distribution network.

4.1 Electrical Connect ion.

− The mains voltage must be the one indicated on the characteristics plate.

− REMOVE THE LEFT-HAND SIDE PANEL in HVG models.

− EXTRACT CONTROL PANEL in HCG models

− Use a polychloroprene cable or another with the same characteristics (HO5RN -F).

− Place a general switch independent of the appliance in the mains outlet with a

distance between contacts equal to or greater than 3 mm.

− A differential grounding shunt device must be installed.

− The appliance must be connected to ground.

− Access the electrical connections strip and fix the cable to the stuffing box, C (see ).

− When installing a number of appliances in a line, these must be connected together to

ground.

4.2 Water inlet.

− Only connect drinking water to the appliance.

− Make the connection to the water mains at point A (see . ), using the hose supplied.

− The water inlet pressure must be between 0.5 and 8 Kg/cm².

− Install a filter and stop cock at the water inlet.

− For water with a hardness of over 10ºF, a water softening unit is required..

− Conductivity of the water 50-2000µS, lower conductivity optional.

Minimum concentration of chlorides Cl under 150 mg./litres.
N the case of values of over 2000µS or when exceeding the limit value for chloride,

place a hydrogen ion exchanger (see fig 9)

− Redox potential 300 mV, (alternatively chlorine content (CL2) lower than 0,1

mg/litre).

In the case of values of over 300 mV Redox potential, place an activated carbon filter
(observe the filter maintenance intervals)
Sedimentation filter Un (0,08 mm) when the impurities in drinking water are high.

11

fig 9

4.3 Drain.

The connector hose must be steam resistant (100ºC).

4.4 Gas inlet.

The connection will be made with a hose fitted with a ½” and ¾” connection in HVG
models.

A stop cock and pressure regulator must be installed between the appliance and the gas
mains.

4.5 Exhaust fume outlet .

The oven must be installed under an extractor hood.(see fig 7)

4.6 Adaptation to different gases.
Gas ovens cannot be adapted to different gases.

12

5 CONTROL PANEL

HVG-10/11
HVG-10/21
HVG-2.10/11
HVG-20/11
HVG-20/21

fig 10

1.- Chamber heating indicator. 15.- Indefinite time fixed position (MANUAL).

2.- Oven ON indicator . 16.- Real temperature at probe core.

3.- Steam generator heating indicator. 17.- Core temperature selector.

4.- Mode selector. 18.- Button to increase probe core

5.- Oven OFF position . selection.

6.- Steam mode position 19.- Button to reduce probe core

7.- Low temperature steam mode position. selection.

8.- Regeneration mode position. 20.- Probe core function selector.

9.- Mixed mode position. 21.- Chamber burner ignition reset

10.- Hot air mode position. button.

11.- Temperature selector . 22.- Generator burner ignition reset

12.- Chamber temperature indicator. button.

13.- Time selector. 23.- Lime indicator.

14.- Variable time position 0-120º. 24.- Machine out of service indicator.

(AUTOMATIC)

13

HCG- 6/11
HCG-10/11
HCG-10/21
HCG-2.10/11
HCG-20/11
HCG-20/21

fig 11

1.- Chamber heating indicator.

2.- Oven ON indicator.

3.- Chamber water inlet indicator.

4.- General switch.

5.- OFF position (OFF).

6.- ON position (ON).

7.- Temperature selector.

8.- Real chamber temperature.

9.- Time selector.

10.- Variable time position 0-120’ (AUTOMATIC).

11.- Indefinite time fixed position (MANUAL).

12.- Humidifier button.

13.- Ignitio n system reset button.

14

6 FUNCTIONAL DIAGRAM (HVG)

fig 12

1- Steam gas valve
2- Convection gas valve
3- Gas duct from steam generator.
4 –Chamber gas duct.
5- Gas duct to main cover.
6 -Mixer.
7 -Mixer coupling
8 –Blower fan.
9 –Main cover.
10- Chamber burner.
11 –Generator burner.
12 –Chamber heat exchanger.
13-Complete fume manifold.
14 –Complete steam manifold.
15 –Complete chimney.

15

Description of the most important components in the
Convection Ignition System (Forced air burner):

VC: Premix centrifugal fan (air blower or supplier) . (fig 28)

This is an air supplier motor for combustion.

-VF: Frequency inverter. (fig -25)

This is the electronics that changes and controls the speed of the fan motor or blower by means of a
voltage variation. We use this to define the two speeds at which the blower fan must work. Ignition speed
S1 and maximum power speed S2.(fig 26)

-GV1-GV2:Convection gas valve.

This is a Honeywell modulating gas solenoid valve. (fig 24) This modulates the gas opening in
accordance with the speed of the blower fan. Valve connected by means of a rubber tube to the blower
fan by means of which it is possible to modulate the gas opening in accordance with the air pressure. (fig

23)

Valves are adjusted for each size of oven or type of gas in the factory only.

CEC: Convection ignition control

This is the electronics that carries out the ignition sequence (spark train- gas valve opening - flame
detection) (fig 15-16 )

Air washer: Washer that defines the amount of correct air for the furnace. (fig 29 )

Mixer: This is the air -gas mixer for combustion. (fig 28 )

BE: This is the spark plug that generates the spark for ignition.(fig 22)

BD: This is the ionisation flame detector. (fig 22)

TC: Chamber thermostat 30 -270ºC

This is the electronic thermostat that controls the chamber temperature (fig. 56). This also has a contact

fixed at 100ºC called T100.

Description of very important components in the
Steam Ignition System (Atmospheric burner):

GV3-GV4: Steam gas valve.

Steam gas solenoid valve SIT 830.(fig 23)

CEV: Steam ignition control

This is the electronics that carries out the ignition sequence (spark - gas valve opening- flame detection)
(fig 15 -16)

16

CN: Water level control.

Electronics that control the generator water level. (fig 37 )

BE: This is the spark plug that generates the spark for ignition.(fig 31)

BD: This is the ionisation flame detector.

RE1: Energy regulator.(fig 34)

Electro-mechanical component for controlling electrical contacts.

Note: In steam mode, the blower fan (VC) always works at ignition speed.

17

Blower fan sequence VC
Correct ignition.

fig 13

Blower fan sequence VC
Incorrect ignition.

fig 14

Ignition control (CEC and CEV)

fig 15 fig 16

CONNECTION IGNITION SEQUENCE

ACRONYMS PR LR GV SI DII LII
FUNCTIONS RESET

BUTTON

RESET
LIGHT

GAS
VALVE

SPARK
PLUG

FLAME
DETECTOR

HEATING
INDICATION
LAMP

18

FUNCTIONAL DIAGRAM HVG and HCG (CONVECTION MODE)

fig 17

HVG CONVECTION MODE (30-270ºC)

fig 18

CONVECTION MODE 30º-270ºC

Convection burner is working.
Chimney open.