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Glow-worm 38cxi User Manual

Glow-worm 38cxi
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Technical Helpline: 01773 828300
Glow-worm, Nottingham Road, Belper, Derbyshire. DE56 1JT
www.glow-worm.co.uk
0020088542-03 02.10
GAS VALVE(DUNGS)
KIT Pt. No. 2000802664
6mm white scroll incl.
Brass Flange adaptor, 4
off screws, 2 “O” rings
MODEL
24 & 30 ultracom cx
24 & 30 ultracom cxi
18 & 30 ultracom sxi
18 & 30 sxi
24 & 30cxi
MODEL
12 – 30 hxi
12 – 30 ultracom hxi
MODEL
38 cxi
38 ultracom cxi
Xtramax HE
MODEL
38 hxi
38 ultracom hxi
BG330
KIT Pt. No 2000802442
6mm white scroll
incl. Brass liner
and grommet
KIT Pt. No 2000802452
12mm grey scroll
incl. Brass liner
and grommet
KIT Pt. No. 0020018823
12mm grey scroll incl.
Brass Flange adaptor,
4 off screws, 2 “O” rings
If the burner door is removed during the gas valve
replacement a new door seal must be tted.
Burner Door Seal kit - Part No. 801635
IMPORTANT NOTES
THESE INSTRUCTIONS SUPERCEDE
THE GAS VALVE SETTING PROCEDURE CONTAINED
WITHIN THE ORIGINAL APPLIANCE LITERATURE.

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Glow-worm 38cxi Specifications

General IconGeneral
Model38cxi
CategoryBoiler
Output38 kW
Efficiency89.2%
Efficiency RatingA
ERP RatingA
Fuel TypeNatural Gas
MountingWall Mounted
Max. Working Pressure3 bar
Electrical Supply230V ~ 50Hz
Flow Rate at 35°C Rise15.7 litres/min
Central Heating Flow Temperature Range30°C to 80°C
TypeCondensing Combi Boiler
Flow Rate15.7 litres/min at 35°C rise

Summary

Gas Valve Instructions

Important Notes on Gas Valve Setting

These instructions supersede original literature for gas valve setting, and note the need for a new door seal if the burner door is removed.

Requirements and General Inspection

General Inspection After Replacement

Post-replacement checks include flue system integrity, combustion circuit, electrical/gas/water connections, system pressure, and combustion performance.

Competency for Combustion Analysis

Ensures personnel are competent in using and interpreting flue gas analyser results as per BS standards.

Combustion Analysis and Adjustment Procedures

LPG Model Specific Ignition

Procedure for adjusting throttle on LPG models if ignition fails, involving anti-clockwise turns and resets for purging.

Maximum and Minimum Rate Adjustment

Adjusting CO2 at maximum and minimum rates using throttle and offset adjustments according to table settings.

Re-Check Combustion Ratio

Verifying maximum/minimum CO2 values and ensuring the CO/CO2 ratio does not exceed the specified limit.

Gas Inlet Pressure and Rate Check

Checking operational gas inlet pressure and measuring gas rate at maximum burner operation.

Gas Rate Table

Natural Gas G20 and Propane G31 Rates

Table detailing maximum gas rates in m3/h, ft/h for Natural Gas, and kg/hr for Propane across various models.

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