Dru Trio RCE G20, Instructions For Installation Manual

English

T R I O

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I N S T R U C T I O N

F O R

I N S TA L L AT I O N

Start

2.01 Can pilot be lit?

2.03 Only one spark?

2.02 Sparking?

2.09 Ignition procedure

-  

Oval knob on gas control is

on “MAN”. Set to “ON” and

restart.

Retarded ignition of main

burner(s)

Gas to main burner opens ca. 3-5

seconds after servo motor,

operating the gas valve, starts

running (sound of motor!). After

this the main burner is to ignite (at

least partially) within 10 seconds

and not with a firm noise WHOOF.

If not: no or delayed cross lighting

of main burner.

Hazardous situation.

Stop ignition procedure straight

away and first check for:

-  

Position of logs or pebbles.

-  

Burner holes (locally)

blocked.

Remove vermiculite dust.

-  

Vermiculite missing.

-  

Chips on burner.

-  

Vermiculite not distributed

evenly across burner(s).

2.11 No proper cross lighting

of main burner(s).

- 

Go to box 2.09 and take

actions act as described 

for  ‘retarded ignition of 

main burner’.

2.06 Pilot can be lit.

Does it stay alight?

2.10 Do(es) main burner(s)

ignite smoothly and across

its/their full length after first

ignition by pilot burner?

2.08 Does main burner ignite

immediately?

2.04 Check:

Receiver

-  

Replace missing, weak or

rechargeable batteries (not

enough power to open

thermoelectric valve).

Presence of gas on pilot burner

Check pilot on presence of gas at

normal ignition cycle or in Manual

Mode (turn oval knob on gas control

to MAN and keep safety shut off

valve opened with a screwdriver) and

ignite pilot with a lighter.

-  

Pilot flame not on: Step 1.

-  

Pilot flame on: Step 2.

Step 1: Pilot has no gas

Check:

-  

Gas tap open?

-  

Gas at gas control (line

pressure at measuring point on

gas control).

-  

Gas flowing out of gas control?

(by loosening pilot tube at gas

control).

If not: check adjustment screw

pilot flame (under black cover):

sealing not to be broken.

Sealing broken: screw should

be fully open.

-  

Blocking of pilot tube (kink or

dirt).

-  

If this does not help: replace

gas control.

Step 2: Pilot has gas, but no

ignition

-  

Electrode with 90° bended tip:

bend tip 1 mm higher.

-  

Spark too weak (thin and

reddish).

Act as if ‘no spark’ in box 2.05

and perform actions described

for ignition cable and ignition

electrode.

-  

Pilot flame too weak (dirty).

Remove injector (remove

gland nut and the pilot tube).

See that it does not fall away.

Clean with compressed air.

Rectify. Retry.

2.05 Check:

Ignition cable

-  

Present and connected.

-  

Being free from metal parts or

concrete.

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Too long: cut away all

excessive length at receiver

end, and reconnect.

-  

Shorting out to earth: replace

ignition cable.

-  

Spark in wrong position:

- slide rubber sleeve on

ignition cable over ceramic of

electrode.

-  

Replace electrode if

neccessary.

Ignition electrode

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Straight electrode:

- oxidation (roughen electrode

with file or sand paper);

- position (4 mm from pilot

burner).

-  

Cracks in ceramic (not always

visible): replace electrode.

Starting procedure

After switching off/going out the

remote is locked for 120 sec. (older

versions 60 sec).

Wait 2 minutes before reigniting..

2.07 

Pilot out when servomotor 

starts

to run? Check the thermocouple

system.

-  

Measure thermocouple

voltage in mV just after

servomotor starts to run and

the voltage goes down.

-  

Measure between red dot on

receiver and earth point on

gas control (see Appendix 4, 

Fig. 25).

- 0 mV

- 2-3 mV

- 3-5 mV

- 6 mV and higher

-  

Requirement: after

rectification actions

thermocouple voltage should

be 6 mV at least, just after

motor starts running!

Voltage 0 mV

-  

Thermocouple defective.

Check by replacing or

measuring voltage at end

whilst heating (tip: with a

lighter).

-  

Short circuiting or

interruptions in circuit:

Check:

- thermocouple tight in

interruptor;

- interruptor tight in gas

control;

- black wires (yellow/red end)

connected to inter

receiver;

- interruptor (mount

thermocouple directly in gas

control and ignite in Manual

Mode (see 2.04).

If pilot stays on: interruptor

defective.

Voltage 2-3 mV

-  

Check pilot flame.

Too small:

- pilot dirty.

Clean up (see 2.04).

- check for pilot gas tube

tightness;

- pilot tube kinks or dirt inside;

- line pressure too low.

-  

Tip: thermo couple not in

(correct!) pilot flame.

Bend into flame.

Voltage 3-5 mV

-  

Appliance may work, but is

too critical.

Perform actions as described

for 2-3 mV.

Voltage 6 mV and higher

Voltage OK, so different cause.

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Receiver defective. Check by

dismounting black-red and

yellow control cables from

receiver and link together.

Ignite fire in Manual Mode

(see 2.04). Pilot stays on:

receiver defective.

-  

Gas control defective if

receiver is not defective.

Replace gas control.

yes

no

yes

yes

no

no

no

no

no

Fires with electronic ignition, fault finding: Ignition and burning

2.03a

-  

Loosen and retighten

earthing screw on gas

control.

-  

If this does not work:

replace receiver.

yes

yes

yes

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