Skov GP14 Manual

2017.12.04 • 612091

Blow Heaters

GP14 /40 /70 /95

Technical User Guide

Blow Heaters

Product and Documentation Changes

SKOV A/S reserves the right to change this document and the product herein described without further notice.

In case of doubt, please contact SKOV A/S.

Date of change appears from the back of this manual.

Safety Instructions and Warnings

The installation must be carried out by an authorized electrician and according to current national and EU

regulations.

A blow heater generates a lot of heat and produces open fire which may result in serious injuries if the

instructions are not observed. For your own safety and for the safety of others, you have to observe the

following rules:

•Do not use the blow heater in case of any sign of damage.

•The blow heater is designed for application together with the connection kit and can only be used

with such a kit.

Before you start using your new blow heater, read the enclosed instructions in order to prevent injury to the

user and damage to the surroundings and the blow heater itself.

Please note that this guide only is a Technical User's Guide. It does not cover the setting of advanced functions

of the blow heaters GP 40 / GP 70 and/or the BCU.

Using gas and gas burners involves the risk of fire, explosion and/or gas poisoning.

Mechanical fitters and technicians connecting the blow heaters to the main gas supply,

disconnect the gas piping and adjust the output of the burner should be trained and

authorised personnel.

Note

whatsoever without the expressed written permission of SKOV A/S in each case.

•SKOV A/S has made all reasonable efforts to ensure the accuracy of the information contained in

this manual. Should any mistakes or imprecise information occur in spite of this, SKOV A/S would

appreciate being notified thereof.

•Irrespective of the above, SKOV A/S shall not accept any liability with regard to loss or damage

caused or alleged to be caused by reliance on any information contained herein.

Check the product as regards defects or damages (e.g. transport damages) prior to initial operation. In case of

defect or damage, please contact SKOV A/S or the nearest distributor.

4 Technical User Guide 
 
Blow Heaters 
1MANUALS SUPPLIED BY THE MANUFACTURER .......................................6
2PRODUCT LAYOUT - OVERALL POSITIONING OF COMPONENTS...........7
3METHOD OF OPERATION ..............................................................................8
3.1 BCU. Functional Diagram and Troubleshooting....................................................9
4RECOMMENDED TOOLS..............................................................................10
5WARNINGS AND SYMBOLS.........................................................................10
6POSITIONING OF BLOW HEATERS - DISTANCES ....................................11
7SUSPENSION OF BLOW HEATER...............................................................12
7.1 Blow Heater with standard suspension kit...........................................................12 
7.2 Blow Heater at a free but fixed height...................................................................13 
7.3 Blow Heater at an adjustable Height.....................................................................14 
8SUSPENSION LOAD......................................................................................15 
8.1 GP 14........................................................................................................................15 
8.2 GP 40 / GP 70 ..........................................................................................................16 
8.3 GP 95........................................................................................................................17 
9ELECTRIC CONNECTION.............................................................................18
9.1 Connection in Blow heater.....................................................................................18 
9.2 Circuit Diagram.......................................................................................................18 
10 CHECK TYPE OF GAS ..................................................................................19
11 CONNECTION TO THE GAS GRID...............................................................19
 
 
 
 
 
 

Technical User Guide 5

Blow Heaters

PRODUCT DESCRIPTION

This Technical User's Guide is a supplement to the manuals supplied by the manufacturer of the product.

Manuals are included with the blow heaters. This guide does not replace the manuals supplied by the

manufacturer. Contact SKOV A/S in case of deviations between information in this guide and the manuals

supplied by the manufacturer. As a rule, the manual supplied by the manufacturer of the product is applicable.

This guide shows the variants of blow heaters used by SKOV A/S, includes a short general functional

description and directions for mounting of the blow heater integrated in a ventilation system.

The blow heaters heat up and circulate the housing air by means of the built-in fans. The blow heaters are

direct-fired and can be a supplement to or a replacement for water-based indirect-fired heating systems and are

primarily used for heating in livestock house sections. Direct-fired means that the generation of heat takes place

as a result of direct, open combustion of gas in the house section itself.

Blow heaters can be used as on/off air circulators, when heating is not required.

Figure 1: Principle sketch of blow heater and stir fan.

Blow heater

Air circulator

6 Technical User Guide

Blow Heaters

1 Manuals supplied by the Manufacturer

This guide is a supplement to the manuals supplied by the manufacturer. Among other things, the manual

supplied by the manufacturer describes exactly how to adjust the blow heater and how to troubleshoot.

The manuals supplied by the manufacturer have A4 format and look like this:

Deals with GP 14:

Deals with GP 40 and GP 70:

Deals with GP 95:

Technical User Guide 7

Blow Heaters

2 Product Layout - overall Positioning of Components

Figure 2: Positioning of main components. (For more detailed information please confer the manual supplied by

the manufacturer)

AThe BCU (Burner Control Unit):

A signal from the SKOV climate computer prompts the internal control of the blow heater executing

the safety, start and stop procedures.

BGas combination valve:

The CG10 or CG220 gas valve controls the pressure in the burner, ensures that the supply pressure is

okay plus opens/closes the gas supply.

CConnection to the gas grid. The supply pressure is measured here.

DPiping between the gas combination valve and the burner. The pressure in the burner is measured

here.

EFan/mechanical blower.

FWind gauge.

Check that the fan is running before gas injection is activated and gas is ignited.

8 Technical User Guide

Blow Heaters

3 Method of Operation

The blow heaters are switched on in the same way as all other types of relay-controlled heat sources; i.e. on/off

operation mode - either full capacity or completely closed. The blow heater does not provide modulation as

regards the output.

When heat requirement is registered by the SKOV climate computer, it switches on the blow heaters by

activating the relay assigned to relay-controlled heating. When it operates as air circulator, it is controlled by

the relay for air circulator.

The blow heaters are connected to their own power supply and are permanently provided operating voltage.

Only the start signal itself comes from the SKOV climate computer which is either 24 V AC/DC or 230V.

Each blow heater has its own internal controller - the so-called BCU (Burner Control Unit).

When the blow heater receives a start signal, the BCU runs through the following start-up procedure every time

(see Figure 2):

1. The position of the wind gauge is registered F.

2. The fan is started E.

3. It is checked that the wind gauge Fchanges position. This confirms that the fan works. If the wind

gauge does not change position, the BCU Aterminates the start-up and carries out a troubleshooting

procedure or changes to ALARM mode.

4. The gas supply pressure is checked. If insufficient gas pressure, the BCU (1) terminates the start-up and

carries out a troubleshooting procedure or changes to ALARM mode.

5. Ignition sequence is activated.

6. If sufficient gas pressure, gas vane is turned on B.

7. The ignition sequence is cut off.

8. Ionization current is registered. If a sufficiently high ionization current has not been registered within

5-10 seconds, the BCU terminates the start-up and changes to ALARM mode.

9. If the ionization current is at a sufficient level (5-30 µA), the gas vane remains on until the start signal

from the SKOV climate computer is cut out.

10. When the start signal is cut out, the gas vane is turned off and the burner switches off.

11. The fan continues to run for minimum 10 seconds after the burner is switched off in order to cool down

the blow heater. Subsequently, the fan switches off automatically.

The start-up procedure and the various alarms are described in detail in the manual supplied by the

manufacturer.

The gas is ignited and combusted in a combustion chamber positioned in the middle of the current of air

produced by the fan. This heats up the housing air. During operation, the temperature of the outside surface of

the blow heater does not exceed 45°C.

Apart from the safety functions mentioned above, the BCU currently monitors the blow heater so that it is not

overheating. The BCU Aand the gas combination valve Bare essential safety components on the blow heaters.

For the same reason, the user must not disassemble/repair the gas combination valve and may only to a limited

degree disassemble/repair the BCU.

Technical User Guide 9

Blow Heaters

3.1 BCU. Functional Diagram and Troubleshooting

Table 1: The functional diagram provides a schematic outline of the functions of the BCU.

Also see diagram in the manual concerning systematic troubleshooting.

10 Technical User Guide

Blow Heaters

GENERAL INFORMATION

4 Recommended Tools

The following or equivalent tools are required for servicing blow heaters. Tools are not supplied by SKOV A/S.

Tools and Instruments

Manometer

For adjustment of the pressure in the gas burner,

troubleshooting and service.

1 x 2.5mm Hex screwdriver

For adjustment of the pressure in the gas burner.

1 x PZ2 screwdriver

For the cover of the BCU.

1 x 3,5mm Slotted screwdriver

For electrical connections.

Access to measuring points

SImpact drill

Drill bits, various sizes

6”, 8” and 10” adjustable spanner

For nuts, bolts and gas connections.

35mm hexagonal socket

+ 400mm extension shaft

+ T-handle bar (max. 300mm)

For nozzle exchange.

Pipe wrenches, various sizes

Water spray bottle with soap water

For leakage search.

Table 2: Indispensable tools for servicing blow heaters

5 Warnings and Symbols

This manual uses the following symbols:

Warning of general danger

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