Dettson CMO32-II Instructions de montage

Printed in Canada

Printed on 100% recycled paper

2019-03-12

X40001 Rev. Y

Caution: Do not tamper with

the unit or its controls. Call a

qualified service technician.

INSTALLER / SERVICE TECHNICIAN:

USE THE INFORMATION IN THIS MANUAL FOR THE INSTALLATION AND

SERVICING OF THE FURNACE AND KEEP THE DOCUMENT NEAR THE UNIT

FOR FUTURE REFERENCE.

HOMEOWNER:

PLEASE KEEP THIS MANUAL NEAR THE FURNACE FOR FUTURE

REFERENCE.

Manufactured by :

Industries Dettson inc.

Sherbrooke, Québec - Canada

www.dettson.ca

DOMESTIC WATER HEATER

OIL FIRED

Models :

CMO32-II

CMO32-II-R

CMO50-II

CMO32-II & CMO32-II-R

CMO50-II

TABLE OF CONTENTS

1.0 SAFETY REGULATIONS......................................3

1.1 DANGER, WARNING AND CAUTION...................3

1.2 SAFETY INSTALLATION REQUIREMENTS.........3

2.0 INSTALLATION.....................................................4

2.1 LOCATION.............................................................4

2.2 ACCESS FOR MAINTENANCE.............................4

2.3 SHIPPING COMPONENTS ...................................4

2.4 WATER CONNECTIONS.......................................4

2.5 FLUE PIPE.............................................................4

2.6 DRAFT REGULATOR............................................4

2.7 BLOCKED VENT SHUT-OFF (BVSO)...................4

2.8 CHIMNEY...............................................................4

2.9 CONTROLS...........................................................4

2.10 WIRING .................................................................4

2.11 COMBUSTION PRIMARY CONTROL (ON

BURNER) ..............................................................5

2.12 INSTALLING THE OIL BURNER...........................5

2.13 NOZZLE DATA ......................................................5

2.14 FUEL OIL PUMP....................................................5

2.15 OIL TANK AND PIPING.........................................5

2.16 VENTILATION AND COMBUSTION AIR...............5

3.0 OPERATION..........................................................5

3.1 INITIAL START-UP................................................5

3.2 ADJUSTMENTS.....................................................5

3.3 SHUT-DOWN.........................................................5

3.4 BVSO PERFORMANCE TEST..............................6

3.5 FLAME FAILURE...................................................6

4.0 MAINTENANCE.....................................................6

4.1 GENERAL..............................................................6

4.2 BLOCKED VENT SHUT OFF (BVSO)

CLEANING.............................................................6

4.3 CLEANING.............................................................6

4.4 COMBUSTION CHAMBER REPLACEMENT ........7

5.0 FURNACE INFORMATION ...................................8

6.0 TECHNICAL DATA ...............................................9

7.0 REPLACEMENT PARTS.....................................11

FIGURES

Figure 1 : Electrical wiring, Beckett burner.........................10

Figure 2 : Electrical wiring, Riello burner............................10

Figure 3 : Parts List, Model 32............................................11

Figure 4 : Parts List, Model 50............................................12

TABLES

Table 1 : Minimum clearances..............................................4

Table 2 : Technical specifications ........................................9

Table 3 : Parts List, Model 32.............................................11

Table 4 : Parts List, Model 50.............................................12

1.0 SAFETY REGULATIONS

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER

FLAMMABLE VAPOURS AND LIQUIDS IN THE VICINITY

OF THIS OR ANY OTHER APPLIANCE.

DO NOT ATTEMPT TO START THE BURNER WHEN

EXCESS OIL HAS ACCUMULATED, WHEN THE

FURNACE IS FULL OF VAPOUR OR WHEN THE

COMBUSTION CHAMBER IS VERY HOT.

1.1 DANGER, WARNING AND CAUTION

The words DANGER, WARNING and CAUTION are used to

identify the levels of seriousness of certain hazards. It is

important that you understand their meaning. You will notice

these words in the manual as follows:

DANGER

Immediate hazards which WILL result in death or

serious bodily and/or material damage.

WARNING

Hazards or unsafe practices which CAN result in death or

serious bodilyand /or material damage.

CAUTION

Hazards or unsafe practices which CAN result in minor

bodilyand /or material damage.

1.2 SAFETY INSTALLATION REQUIREMENTS

WARNING

Installation or repairs performed by unqualified persons

can result in hazards to them and others. Installation

MUST conform to local codes or, in the absence of same,

to codes of the countryhaving jurisdiction.

The information contained in this manual is intended for

use by a qualified service technician familiar with safety

procedures and quipped with the proper tools and test

instruments.

Failure to carefully read and follow all instructions in this

manual can result in death, furnace malfunction and/or

property damage.

WARNING

For use with grade 2 fuel oil maximum. Do NOT use

gasoline, crankcase oil or anyoil containing gasoline.

WARNING

Never burn garbage or paper in the heating system

and never leave rags or paper around the unit.

a. It is the homeowner's responsibility to engage a

qualified technician for the installation and

subsequent servicing of this water heater;

b. Do not use this appliance if any part of it was under

water. Call a qualified service technician immediately,

to assess the damage and to replace all critical parts

that were in contact with water;

c. Ask the technician installing your water heater to

show and explain to you the following items:

i) The main disconnect switch

ii) The shut-off valve on the oil tank;

iii) The oil filter and how to change is (once a year);

d. Before calling for service, be sure to have the

information page of your manual close by, in order to

be able to provide the contractor with the required

information, such as the model and serial numbers of

the water heater.

IMPORTANT: All local and national code requirements

governing the installation of oil burning equipment, wiring

and flue connections must be followed. Some of the codes

that may be applicable are:

CSA B139 Installation Code for Oil Burning

Equipment

NFPA 31 Installation of Oil Burning Equipment

ANSI/NFPA 70 National Electrical Code

CSA C22.1 Canadian Electrical Code

Only the latest issues of the above codes should be used,

and are available from either:

The Canadian Standards Association

178 Rexdale Blvd.

Rexdale, Ontario M9W 1R3

CAUTION

ENVIRONMENTAL HAZARD

Failure to follow this caution may result in environmental

pollution.

Remove and recycle all components or materials (i.e. oil,

electrical and electronic components, insulation, etc.)

before unit final disposal.

2.0 INSTALLATION

2.1 LOCATION

The water heater must be installed on a level and NON-

COMBUSTIBLE surface, as close as possible to the

chimney. The water heater must also be located close to a

suitable free-flowing floor drain. Where a floor drain is not

adjacent to the water heater, a suitable drain pan must be

installed under the water heater. This drain pan should be at

least 4’’ (10,2 cm) larger than the diameter of the water heater,

and at least 1’’ (2.5 cm) deep providing access to the drain

valve. This pan must be piped to a suitable drain to prevent

damage to property in the event of a water leak from the

piping, the relief valve, or the water heater.

Sooner or later, all water heaters leak. The manufacturer,

based on national building codes has given the necessary

advice to prevent damage to the building. Under no

circumstances is the manufacturer to be held liable for any

water damage in connection with this water heater.

Note : If the temperature in the house and/or the

basement is under 16°C (60°F) there is an increased

possibility of condensation inside the chimney.

2.2 ACCESS FOR MAINTENANCE

Convenient access shall be provided to permit cleaning of

heating surfaces, flue pipe and for burner maintenance.

Minimum clearances from combustible material should be:

Table 1 : Minimum clearances

2.3 SHIPPING COMPONENTS

The unit is shipped in two separate cartons; the first carton

is for the water heater tank. The second is for the burner the

aquastat, the wiring harness and the flue adaptor.

2.4 WATER CONNECTIONS

WARNING

To avoid water damage and/or scalding due to relief

valve operation, a discharge line must be connected to

the valve outlet and run to a drainage area. The

discharge line shall be installed in such a way that it will

allow for complete drainage of the valve and discharge

line.

Make the hot and cold water connections to the water

heater. Do not apply heat to the hot water outlet and cold

water inlet, as they contain a plastic sleeve inside. Pressure

relief valves are installed on all models.

2.5 FLUE PIPE

The water heater should be connected to a chimney or an

approved pre-fabricated flue. The flue pipe should be the

same size as the flue outlet of the unit. It is preferable to

maintain a pitch or rise from the heater to the chimney of 2.0

cm per 1 m (1/4" per foot). The flue pipe must not be

extended past the inside wall of the chimney.

2.6 DRAFT REGULATOR

The draft regulator must be installed between the flue outlet

of the water heater and the chimney. (Installation

instructions are furnished with the regulator).

2.7 BLOCKED VENT SHUT-OFF (BVSO)

For chimney venting

WARNING

It is imperative that this device be installed by a

qualified technician.

This device is designed to detect the insufficient evacuation

of combustion gases in the event of a vent blockage. In such

a case the thermal switch will shut down the oil burner. The

device will then need to be re-armed MANUALLY.

Refer to the wiring diagrams and the detailed instructions

supplied with the BVSO for the installation and wiring

procedure. The length of wires supplied with the unit is such

that the safety device must be installed between the flue

outlet of the appliance and the draft regulator, as indicated

in the instructions.

It is further imperative that the BVSO be maintained

annually. Refer to the instructions supplied with the device

and paragraph 4.2 of this manual for more details.

2.8 CHIMNEY

For information pertaining to chimney sizes, elevation,

conditions, etc., see C.S.A. Standard B-139, "Installation

code for oil burning equipment."

WARNING

An oil-fired unit shall be connected to a flue having

sufficient draft at all times to assure proper operation of

the unit.

2.9 CONTROLS

Mount the aquastat control on the unit. Set operating control

between 48°C (120°F) and 60°C (140°F). The maximum

setting for all models is 60°C (140°F). If required, set the

high-limit at a temperature of 20 ° F higher than the

operating control.

2.10 WIRING

Connect BX harness from aquastat to the side of the burner

relay junction box. Wire oil burner and controls according to

the attached wiring diagram. The field supplied wiring should

be connected to the top of the aquastat on all models.

Models 32 and 50

Sides

5,08 cm (2")

Rear

5,08 cm (2")

Top

45,70 cm (18")

Front

61,00 cm (24")

Flue

22,90 cm (9")

2.11 COMBUSTION PRIMARY CONTROL

(ON BURNER)

The purpose of this control is to sequence the operation of

the burner. The first function is to close the burner circuit

and the ignition transformer circuit when the aquastat calls

for heat and also to open the burner circuit when the water

temperature is attained. The second function is to shut-off

the oil burner in the case of lack of ignition, oil, flame, proper

voltage or due to burner malfunction.

2.12 INSTALLING THE OIL BURNER

The nozzle is installed on the burner. Make sure to adjust

the nozzle and electrode as per Table 2. Mount burner on

water heater and use the gasket supplied, between burner

mounting flange and the water heater.

When reusing a compatible burner in good condition, verify

the insertion length and adjust the burner flange accordingly.

Always change the nozzle for a new one as specified on the

nameplate.

CAUTION

Riello burners requires a ceramic felt sleeve (amulet

#N05F016 over the tube.

If this caution is not observed, the warranty is null and

void.

2.13 NOZZLE DATA

Refer to the Technical Specifications (Table 2).

2.14 FUEL OIL PUMP

The fuel oil pump is developed for pressure atomizing type

oil burner service and has a built-in pressure regulating

valve and oil filter. Connections are provided for both, a one

pipe system and a two pipe system. Pump pressure is

gauged at the factory. This is the proper working pressure

and should be checked with a suitable gauge at the spot

indicated on the pump.

2.15 OIL TANK AND PIPING

The oil tank must be installed on a suitable base in order to

prevent settling and the foundation must be of non-

flammable material. A manual shut-off valve and an oil filter

must be installed in the oil supply line located at the outlet of

the oil tank. Use properly sized oil supply lines for

installation. Consult the latest C.S.A. code and supplements

for installation of oil burning equipment. An oil return line

must be used on an installation where the oil level of the

tank is below the burner. This return line must be the same

size as the suction line.

At the beginning of every heating season have a qualified

service technician check the entire oil distribution system for

leaks.

2.16 VENTILATION AND COMBUSTION AIR

Normally, infiltration of air into the home is adequate to

provide the necessary volume of air for combustion and

ventilation. When a unit is installed in a room under high

negative pressure conditions, provisions should be made for

an outside source of combustion air. If the unit is located in

an enclosed area, two openings are required, one near the

floor and the other near the ceiling. Each opening should

have a minimum area of one square inch per 1,000 BTU/h,

free of any obstruction. In the case of an outside wall, only

one opening is required. This opening must be protected by

a louver to prevent snow or rain penetration. A minimum

area of one square inch per 5,000 BTU/h is required and

must be free of any obstruction.

3.0 OPERATION

3.1 INITIAL START-UP

1. Turn-off the electric switch, which controls the water

heater (see that proper fuses are installed, max: 15

amps);

2. Fill the water heater (leave inlet water valve open);

3. Carefully check for water leaks;

4. Open manual shut-off valve from oil tank to burner;

5. Adjust the combustion air band or set the damper to a

quarter open position;

6. Press the reset button on the combustion safety relay

ONCE ONLY (relay is mounted on burner);

7. Turn the switch to "ON" (burner should start);

8. Purge the oil line through the valve located near the

pump (refer to the instructions enclosed with the

burner).

9. Carefully check for oil leaks.

3.2 ADJUSTMENTS

CAUTION

In order for the manufacturer’s warranty to apply, the oil

burner must be adjusted between No. 0 and 1 of smoke

density. There must also be a minimum draft of -0.02’’

w.c. at the vent connector. These adjustments must be

made with a Bacharach instrument or equivalent. If not,

the warrantyis null and void.

1. Adjust the draft regulator to obtain a minimum of

-0.02” W.C. The reading must be taken between the

water heater flue outlet and the draft regulator;

2. Adjust the combustion air band to produce a No. 1

smoke spot maximum on the Bacharach scale. The

reading must be taken only when the combustion

chamber is hot and the observation door is closed;

3. Set the operating and the Limit Control as previously

specified.

3.3 SHUT-DOWN

1. Turn off power to the unit.

2. Close oil valve at oil storage tank.

Note: Always keep the fuel supply valve closed if the burner

is shut-down for an extended period of time.

3.4 BVSO PERFORMANCE TEST

The purpose of the following test is to check that the electrical

outlet on the furnace, designated to the BVSO, is functional.

1. Start up the burner;

2. Remove the three-pole plug from the BVSO outlet on the

furnace;

3. The burner must shut-off immediately.

4. If the test is not in line with the above, call a qualified

service technician.

3.5 FLAME FAILURE

1. Wait at least five minutes before pushing the safety

control;

2. Check fuses or breakers;

3. Check oil level in the tank and make sure that the oil

valve is open (if the tank is empty, have it filled and

purge the oil line);

4. Make sure that the aquastat is set above water

temperature;

5. Reset the safety control ONCE ONLY;

6. If the burner still does not start, call a qualified service

technician.

4.0 MAINTENANCE

4.1 GENERAL

1. The water heater and flue pipe should be cleaned, once

a year;

2. The unit should be flushed monthly and in the case of

hard water areas, more often;

3. The anodes should be inspected annually, and if

necessary, replaced. (The anodes have a life

expectancy from one to ten years depending on

water conditions);

CAUTION

The warrantywill be void if the anodes are not replaced.

4. The nozzle should be inspected and if necessary,

removed and replaced. Handle nozzle with care so that

the inside surface of the tip is not scratched.

5. The electrodes should be cleaned and adjusted

according to the burner manufacturer’s specifications;

6. Do not lubricate the oil burner motor, it is permanently

lubricated;

7. The oil filter should be changed annually:

a) Place a pan under strainer and remove strainer

cover, taking care not to damage gaskets.

b) Take out strainer cartridge and replace it annually.

c) Re-assemble strainer.

4.2 BLOCKED VENT SHUT OFF (BVSO) CLEANING

For continued safe operation, the Blocked Vent Shut-Off

System (BVSO) needs to be inspected and maintained

annually by a qualified service technician.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Disconnect electrical power supply to the furnace

before servicing the blocked vent shut-off.

1. Remove the two screws holding down the BVSO

assembly cover;

2. Remove the cover;

3. Remove the two screws holding the control box to the

heat transfer tube assembly. Sliding the control box in the

appropriate direction will unlock it form the heat transfer

tube assembly;

4. Carefully remove any build-up from the thermal switch

surface;

CAUTION

Do not dent or scratch the surface of the thermal switch.

If the thermal switch is damaged, it must be replaced.

5. Clear and remove any build-up or obstruction inside the

heat transfer tube;

6. Re-mount, lock and fasten the control box with the 2

screws removed in step 3;

7. Re-attach the assembly cover with the screws removed in

step 1;

8. Re-establish power to the appliance.

4.3 CLEANING

1. Turn main power switch "OFF";

2. Close oil valve at oil storage tank;

3. Remove flue pipe from water heater flue outlet;

4. Clean flue pipe with wire brush and vacuum;

5. Remove oil burner from water heater and inspect

combustion chamber;

6. Remove the screws holding the transformer to the

casing and swing transformer back on its hinges;

7. Disconnect and remove the tubing from the nozzle by

removing the nut;

8. Pull out the assembly;

9. Clean the nozzle inside the burner blast tube;

10. Check to see that the nozzle and electrode settings are

correct (see burner manufacturer’s specifications);

11. Re-install assembly by reversing the above procedure.

4.4 COMBUSTION CHAMBER REPLACEMENT

To replace the combustion chamber, follow these steps:

1. Turn off the power to the unit;

2. Remove the burner and the access panel. Cut the

insulation and unscrew outer liner;

3. Take off the insulation pad and remove the damaged

chamber by sliding it out;

4. Install the new chamber.

5. Re-install insulation, outer liner, access panel and

burner. Ensure that the insulation completely encloses

the space between the combustion chamber and the

tank.

When ordering replacement parts, always indicate the

model number, which is located on the rating plate.

5.0 FURNACE INFORMATION

Model:

Serial number:

Installation date:

Service telephone - Day:

Night:

Dealer name and address:

START-UP TEST RESULTS

CO2:

Stack temp.:

Firing rate:

GPH

Smoke:

Draft - at stack:

Test performed by:

6.0 TECHNICAL DATA

Table 2 : Technical specifications

Burner insertion sleeve length

Firing rate (USGPH) 0.65 0.75 0.65 0.75 0.65 0.75

Input (BTU/h) 91 000 105 000 91 000 105 000 91 000 105 000

Capacity(BTU/h) 70 000 83 000 70 000 83 000 70 000 83 000

1st hour rate at 55.6°C (100°F) temperature rise 125 USG 183 USG 125 USG 183 USG 154 USG 198 USG

Flue draft

Nozzle Delavan 0.65-80W 0.65-80W

Pump pressure (psi) 100 100

Air settings 7/0 7/0

ATC AF65B0 AF65B0

Low firing rate baffle YES YES

Static disc, model 3 3/8"R 3 3/8"R

Nozzle Delavan 0.65-80B

Pump pressure (psi) 100

Air settings 3/0

ATC AF72YH

Low firing rate baffle YES

Static disc, model 3 3/8"U

Nozzle Delavan 0.65-70A 0.65-70A

Pump pressure 135 135

Combustion air adjustment (turbulator/damper) 0 / 3.5 0 / 3.5

Nozzle

Danfoss

0.55-60AS

Delavan

0.65-60W

Pump pressure 165 175

Combustion air adjustment (turbulator/damper) 0 / 1.5 2 / 1.0

Overall dimensions (width xdepth xheight)

Flue pipe diameter

Tank capacity

Shipping weight

Maximum operating pressure 150PSI

RATING AND PERFORMANCE

CMO32-II

CMO32-II-R

CMO50-II

5 1/2''

4 3/4''

5 1/2''

-0.02" W.C.

BECKETTBURNER AFG-F0 (4 slot air shutter - insertion 5 5/8") - PART # B10273

BECKETTBURNER AFG-F3 (8 slot air shutter - insertion 5 1/2")

RIELLO BURNER 40-F3 (insertion 5 5/8") - PART # B10435 WITHAMULET #N05F016

121 L / 32 US gal

190 L / 50 US gal

77 kg / 171 lbs

120 kg / 264 lbs

RIELLO BURNER R35.3 (insertion 4 3/4") - PART # N01F057 WITHAMULET #N05F016

GENERAL INFORMATION

20" x20" x51"

24" x24" x59 1/2"

Figure 1 : Electrical wiring, Beckett burner

Figure 2 : Electrical wiring, Riello burners

Non disponible sur le Riello R35.3 / Not available on the Riello R35.3

DNS-0242 Rev. D

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