Multicalor O24 UF, O24 DF, O28 DF, O28 UF, O33 UF User Manual
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Multicalor O
Oil fired warm air heaters
Brand: Multicalor
Base model: O24 UF
Variants: O24DF
O28UF – O28 DF
O33UF – O33 DF
O41/48 UF - O41/48 DF
Country of destination: UNITED KINGDOM
Electrical supply: 230V AC – 50Hz
Manufacturer: Multicalor Industries NV
Blarenberglaan 21
B–2800 MECHELEN
Tel.: +32 (0)15 29 03 03
Fax: +32 (0)15 29 03 20
Date created: 1/09/2004
Datum latest change: 1/09/2004
Please keep this manual close to the apparatus for further reference
Document code: O24_uk_en.pdf
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Table of contents
Dimensional data UPFLOW 3
Dimensional data DOWNFLOW 4
1 General 5
1.1 Normal version 5
1.2 Make–up air version 5
1.3 Upflow and Downflow models 5
2 Technical data 5
2.1 General 5
2.2 Air Flow 5
3 Installation 5
3.1 General 5
3.2 Electrical installation 6
3.3 Installing oil supply lines 7
3.4 Installing the ducting system 7
3.5 Installing the flue gas exhaust 7
4 Commissioning 7
4.1 Switching the apparatus on and off 7
4.2 Setting the air temperature 7
4.3 Setting the air quantity 7
4.4 Outside air version 8
4.5 Downflow versions 8
4.6 Installing the ducting system 8
4.7 Commissioning the burner 8
4.8 Fan and limit controller 8
5 Maintenance 9
5.1 Maintenance by the user 9
5.2 Maintenance by the installer 9
6 Problem solving 9
6.1 Unit won’t start during heat request 9
6.2 Fan keeps on running 10
7 Electrical wiring diagrams 10
7.1 Upflow units 10
7.2 Downflow units 11
8 Warranty 11
8.1 General 11
8.2 Scope and duration of the warranty 11
8.3 Damage that is not covered by the warranty 11
8.4 Not covered under warranty 12
8.5 Repairs 12
8.6 Service sets 12
9 Statement of compliance 13
2
Dimensional data UPFLOW
1 300
780
747
502
472
442
60
65
A
575 x 450
55
1
50
520
B
192
390
550
A
560
C
Type
O18
O24
O28
O33
O41-48
A
660
660
660
660
760
B C
452
452
452
452
552
205
205
–
–
–
3
5
Dimensional data DOWNFLOW
1 300
15
0
520
552
192
60
760
820
850
880
400
550
760
A
Type
O18 DF
O24 DF
O28 DF
O33 DF
O41-48 DF
A
520
520
520
560
660
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1 General
The Multicalor oil fired warm air heaters have been specifically designed for domestic and light commercial use. They feature
a high quality ferritic stainless steel heat exchanger and efficient direct driven fan.
The heaters are delivered without burner. A high quality burner (preferably with pre-heating) should be installed by the
installer during fitting. Every single fan has been tested for proper functioning before leaving our premises. The label inside
the unit states the proper nozzle and burner working pressure. After the ductwork, burner, electrical connections and flue pipes
have been connected, the unit is ready to be used.
The warm air heaters must only be commissioned by approved installers. Every installation should comply with local rules.
1.1 Normal version
In standard use the apparatus is used to distribute recycled air to which not more than 25% outside air has been added, or to
distribute up to 100% outside air after heat reclaim. The unit is factory supplied in this version.
1.2 Make–up air version
In make-up air version the unit is used to distribute air to which more than 25% outside air is added. However, in the unit no
special regulators are installed to keep the air temperature constant. If you want to use the unit as an outside air unit, we suggest
that you add thermal insulation to the front fan access panel to prevent condensation.
1.3 Upflow and Downflow models
The Multicalor oil units are available in upflow and downflow version. Please state the desired version when ordering. The
units can NOT be converted on site.
2 Technical data
2.1 General
The heaters comply to CE regulations regarding the machine directive 89/393/EEG, the low voltage directive 72/23/EEG and
the EMC directive 89/336/EEG. The units are available in different capacities.
2.2 Air Flow
Type O24 [DF] O28 [DF] O33 [DF] O41 [DF] O48 [DF]
Nett output kW 24.0 28.0 33.0 41.0 48.0
Gross input kW 26.3 30.7 35.8 44.5 53.3
Nozzle GPH 0.55–60°–S 0.65–60°–S 0.75–60°–S 1.10–60°–S 1.10–60°–S
Burner pressure kg 11.0 11.0 11.0 10.0 11.0
Electrical absorbed power A 3.0 5.0 5.0 7.0 7.0
Electrical supply V-F-Hz 230–1–50 230–1–50 230–1–50 230–1–50 230–1–50
Oil consumption kg/h 2.24 2.61 3.08 3.83 4.53
Air flow Speed Speed Speed Speed
m³/h L M H L M H L M H L M H
1 200 138 162 173
1 400 107 143 154 94 253 340 166 297 374
1 600 58 119 136 9 200 303 77 255 345
1 800 90 114 125 260 208 312
2 000 51 87 212 146 273 200 288 359
2 200 56 150 63 230 107 242 330
2 400 23 78 182 181 295
2 600 120 108 255
2 800 54 16 210
External static pressure in N/m²
3 000 157
3 200 100
3 400 29
3 600
3 Installation
3.1 General
• We wish to emphasize that only qualified fitters or contractors shall install the air heater.
• The installation shall be done in accordance with the latest issue of all local standards as well as the installation manual
of the device concerned.
• Ensure that the conditions of local utility provision (electrical and oil supply) match the device settings before installing
the device or making it operational.
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