PSG CADDY MAX CADDY WOOD ADD-ON PF01102 User manual

46174A
Printed in Canada 04-02-2020
Installation and operating instructions
for the MAX CADDY WOOD ADD-ON
(PF01102 model)
Certified according to CSA B415.1-10, CSA B366.1
Read these instructions carefully before installing
and operating your Add-on.
CONGRATULATIONS!
You have purchased one of the finest wood add-on available
on the market. We are confident that your add-on will provide years of comfort
and safe operation.
Please keep this document!
Verified and tested for Canada by an
accredited laboratory.
This manual is available for free download on the manufacturer’s
web site. It is a copyrighted document. Re-sale is strictly
prohibited. The manufacturer may update this manual from time
to time and cannot be responsible for problems, injuries, or
damages arising out of the use of information contained in any
manual obtained from unauthorized sources.
Eco-energy at the hearth
of your home
PSG
250, de Copenhague,
St-Augustin-de-Desmaures (Quebec)
CANADA G3A 2H3

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TABLE OF CONTENT
1. INTRODUCTION......................................................................................................................................................................... 4
2. APPLIANCE PERFORMANCE(1)................................................................................................................................................ 5
3. GENERAL FEATURES .............................................................................................................................................................. 6
4. SPECIFICATIONS...................................................................................................................................................................... 6
5. LABEL PLATE ........................................................................................................................................................................... 7
6. MAX CADDY ADD-ON TECHNICAL DATA............................................................................................................................... 9
7. ADD-ON DIMENSIONS.............................................................................................................................................................. 9
8. CHIMNEY AND DRAFT............................................................................................................................................................ 10
9. SAFETY RULES....................................................................................................................................................................... 10
9.1. GENERAL REQUIREMENTS.......................................................................................................................................... 10
9.2. ODOURFROM THE PAINT............................................................................................................................................. 11
9.3. ASH DISPOSAL............................................................................................................................................................... 11
9.4. CREOSOTE BUILD-UP AND REMOVAL......................................................................................................................... 11
9.5. SMOKE DETECTOR ....................................................................................................................................................... 11
9.6. DOOR GLASS................................................................................................................................................................. 11
9.7. GLASS SPECIFICATIONS.............................................................................................................................................. 11
9.8. ASH DRAWER................................................................................................................................................................. 12
9.9. ASH GRATE.................................................................................................................................................................... 12
MAX CADDY ADD-ON (SERIAL INSTALLATION FOR CANADA ONLY) PF01102........................................................................ 13
10. SAFETY PRECAUTION ........................................................................................................................................................... 14
11. INTRODUCTION....................................................................................................................................................................... 14
11.1. BLOWER OF THE EXISTING FURNACE........................................................................................................................ 14
12. APPLIANCE INSTALLATION .................................................................................................................................................. 14
12.1. MATCHING THE TRANSFER DUCT BETWEEN THE TWO HEAT GENERATORS ....................................................... 14
12.2. MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS AND FLOOR PROTECTION............................................. 18
12.3. INSTALLING THE CONNECTING DUCT FROM THE EXISTING FURNACE.................................................................. 18
12.4. PIPE CONNECTOR ANDDAMPER ................................................................................................................................ 19
12.5. ELECTRICAL CONNECTIONS ....................................................................................................................................... 19
12.6. SERVOMOTOR INSTALLATION..................................................................................................................................... 19
12.7. OPERATING INSTRUCTIONS........................................................................................................................................ 19
13. ELECTRICAL DIAGRAM FOR SERIAL ADD-ON (VIA CONTROL)........................................................................................ 20
14. ELECTRICAL DIAGRAM FOR SERIAL ADD-ON (VIA MOTOR)............................................................................................ 22
15. INSTALLATION INSTRUCTIONS............................................................................................................................................ 24
15.1. LINK BOARD INSTALLATION AND CONNECTION........................................................................................................ 24
15.2. TOUCHSCREENINSTALLATION AND CONNECTION.................................................................................................. 25
15.3. HOT AIR PLENUM TEMPERATURE PROBE INSTALLATION AND CONNECTION(RTD)............................................ 26
15.4. SERVOMOTOR INSTALLATION AND CONNECTION.................................................................................................... 27
15.5. UNIT LOCATION............................................................................................................................................................. 28
15.6. MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS AND FLOOR PROTECTION............................................. 28
15.7. MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS .......................................................................................... 28
15.8. MINIMUM CLEARANCES TO COMBUSTIBLES MATERIALS FOR HOT AIR PLENUM................................................. 29
15.9. FLOOR PROTECTION.................................................................................................................................................... 30
15.10. FLUE AND BAROMETRIC DRAFT CONTROL CONNECTION....................................................................................... 31
15.11. ELECTRICAL CONNECTIONS ....................................................................................................................................... 32
15.12. DAMPER ......................................................................................................................................................................... 32
15.13. COMBUSTION AIR AND FRESH AIR INTAKE ADAPTER INSTALLATION (OPTIONAL)............................................... 32
15.14. HOT AIR PLENUM........................................................................................................................................................... 33
16. THERMOSTAT INSTALLATION.............................................................................................................................................. 34
16.1. WOOD ADD-ON ONLY.................................................................................................................................................... 34
16.2. INSTALLATION OF ADOMESTIC WATER PRE-HEATINGSYSTEM ............................................................................ 35
17. CONFIGURATION AND OPERATING INSTRUCTIONS ......................................................................................................... 35
17.1. CONTROLS SYSTEM ..................................................................................................................................................... 35
17.2. SYSTEM CONFIGURATION........................................................................................................................................... 35
17.3. TOUCH SCREEN ............................................................................................................................................................ 35
17.4. ICONS DESCRIPTION.................................................................................................................................................... 36
17.5. LANGUAGE SELECTION, TEMPERATURE UNIT AND ALARM SOUND....................................................................... 36
17.6. SYSTEM BALANCING .................................................................................................................................................... 36
17.7. WOOD HEATING ............................................................................................................................................................ 37
17.8. LIGHTING........................................................................................................................................................................ 37
17.9. PREHEATING ................................................................................................................................................................. 37
17.10. HEATING......................................................................................................................................................................... 37
17.11. EARLY SIGNS OF AN OVERFIRED ADD-ON:................................................................................................................ 37

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17.12. WOOD AS HEATING FUEL............................................................................................................................................. 38
17.13. PROLONGED POWER FAILURE.................................................................................................................................... 38
17.14. CHIMNEY FIRES............................................................................................................................................................. 38
17.15. LOCAL FIRE DEPARTMENT........................................................................................................................................... 38
18. MAINTENANCE........................................................................................................................................................................ 39
18.1. MAINTENANCE OF THE EXCHANGERS....................................................................................................................... 39
18.2. CHIMNEY MAINTENANCE ............................................................................................................................................. 40
18.3. SMOKE PIPE INSPECTION............................................................................................................................................ 40
18.4. DOOR GASKET MAINTENANCE.................................................................................................................................... 40
18.5. DOOR ADJUSTMENT PROCEDURE ............................................................................................................................. 40
19. REPLACEMENT PARTS.......................................................................................................................................................... 40
19.1. DOOR GLASS................................................................................................................................................................. 41
19.2. GASKET.......................................................................................................................................................................... 41
20. TROUBLESHOOTING.............................................................................................................................................................. 41
20.1. VALIDATING STATUS OF ACOMPONENT.................................................................................................................... 42
20.2. AIR DAMPER AND HOT WATER .................................................................................................................................... 42
20.3. TEMPERATURE PROBE (RTD)...................................................................................................................................... 42
20.4. MAIN ERROR CODES, POSSIBLE CAUSES ANDSOLUTIONS.................................................................................... 42
20.5. UNIT OVERHEAT............................................................................................................................................................ 43
20.6. NO HEAT......................................................................................................................................................................... 43
20.7. COMMUNICATION ERROR............................................................................................................................................ 44
20.8. SMOKE SMELL............................................................................................................................................................... 44
20.9. THE LCD TOUCH SCREEN DOES NOT LIGHTUP......................................................................................................... 44
20.10. AUXILIARY OVERRIDE .................................................................................................................................................. 44
21. EXPLODED VIEW AND PART LIST........................................................................................................................................ 45
22. PSG LIMITED LIFETIME WARRANTY (REGULAR) ............................................................................................................... 53
23. PSG LIMITED LIFETIME WARRANTY (PRIVILEGE).............................................................................................................. 54

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IMPORTANT NOTE:
THE INSTALLATION OF THIS CENTRAL HEATING SYSTEM MUST BE PERFORMED BY A
QUALIFIED TECHNICIAN. PSG RESERVES ITSELF THE RIGHT TO VOID ITS WARRANTY
OR DENY TECHNICAL ADVICE IF THE ADD-ON HAS NOT BEEN SOLD OR INSTALLED BY A
PROFESSIONAL.
REGISTER YOU WARRANTY ONLINE
To receive full warranty coverage, you will need to show evidence of the date
you purchased your Add-on. Keep your sales invoice. We also recommend
that you register your warranty online at
http://www.caddyfurnaces.com/en/warranty/warranty-registration
Registering your warranty online will help us track rapidly the information we
need on your add-on.
1. INTRODUCTION
Take note that this add-on operates like an EPA wood burning stove. This applies to the lighting, the ember bed, and
the minimum combustion air intake which was determined based on the use of good seasoned cordwood.
The Max Caddy add-on was tested and approved according to the CSA B415.1-10 Standard.
To optimize the efficiency of your add-on, here is some advice that you should follow when installing or operating your
Max Caddy add-on.
•Respect the local codes (when in doubt, consult your local dealer);
•Make sure your add-on is installed according to the instructions on the certification label;
•All controls and adjustments must be performed by a qualified technician. The blower speed of the existing
furnace must conform to the recommendations of local codes and should respect the static pressure ranges in
the warm air plenum of the add-on.
We recommend that our wood burning hearth products be installed and serviced by professionals who are certified in
Canada by WETT (Wood Energy Technical Training) or in Quebec by APC (Association des Professionnels du
Chauffage).
This add-on has been developed and built for residential heat source. Commercial and industrial use is prohibited and
will void the warranty.

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2. APPLIANCE PERFORMANCE(1)
Fuel type
Dry cordwood
Recommended heating area[*]
1,500 to 3,500 ft² (139 to 325 m²)
Firebox volume
4.9 ft³ (0.139 m³)
Maximum burn time[*]
17 h
Maximum input capacity (dry cordwood)(2)
421,000 BTU
Overall heat output rate (min. to max.)(3)
18,436 BTU/h to 66,620 BTU/h (5.6 kW to 19.6 kW)
Nominal heat output at 15lb/ft³ fuel loading density
100,000 BTU/h
Average overall efficiency(4)
78.9% (HHV)(5)
85 % (LHV)(6)
Delivered heat output rate (min. to max.)(7)
15,112 BTU/h to 51,203 BTU/h (4.7 kW to 16.0 kW)
Average delivered efficiency(8)
64.6% (HHV)(5)
69.7 % (LHV)(6)
Optimum efficiency(9)
85.7 %
Average particulate emissions rate(10)(11)
0.752 lb/mmBTU (0.324 g/MJ)
Average CO(12)
12.20 lb/mmBTU (5.25 g/MJ)
[*] Recommended heating area and maximum burn time may vary subject to location in home, chimney draft, heat loss factors,
climate, fuel type and other variables. The recommended heating area for a given appliance is defined by the manufacturer as its
capacity to maintain a minimum acceptable temperature considering that the space configuration and the presence of heat
distribution systems have a significant impact in making heat circulation optimum.
(1) Values are as measured per CSA B415.1-10, except for the recommended heating area, firebox volume, maximum burn time
and maximum input capacity. Performances based on a fuel load prescribed by the standard at 10 lb/ft³ and with moisture
content between 18% and 28%.
(2) Input value at 10lb/ft³ fuel loading density and dry energy value of 8,600BTU/lb.
(3) Overall: Radiated and delivered heat together at10lb/ft³ fuel loading density over one total burn cycle.
(4) Efficiency based on delivered heat when allowing cycling from high to low burn to simulate thermostat demand.
(5) Higher Heating Value of the fuel.
(6) Lower Heating Value of the fuel.
(7) Delivered: Remotely provided to other rooms through ducting at 10 lb/ft³ fuel loading density over one total burn cycle.
(8) Efficiency based on radiated and delivered heat when allowing cycling from high to low burn to simulate thermostat demand.
(9) Optimum overall efficiency at a specific burn rate (LHV).
(10) Based on delivered heat output.
(11) This appliance is officially tested and certified by an independent agency.
(12) Carbon Monoxide. Based on overall heat output at 10lb/ft³ fuel loading density.

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3. GENERAL FEATURES
Maximum log length
25 in (635 mm) / north-south*
Diameter of the flue collar
6 in (152 mm)
Recommended chimney diameter
6 in (152 mm)
Required type of chimney
CAN/ULC S629 (2100 °F)
Baffle material
C-Cast
Alcove installation
Not approved
Mobile home installation‡
Not approved
Appliance weight (without option)
614 lb (279 kg)
Shipping weight (without option)
729 lb (331 kg)
Particulate emission standard
CSA B415.1-10
Canadian standard (safety)
CSA B366.1
** East-west: through the door you see the longitudinal sides of the logs; north-south: through the door you see the tips of the logs.
‡ Mobile home (Canada). In Canada, a mobile home is a dwelling for which the manufacture and assembly of each component is
completed or substantially completed prior to being moved to a site for installation on a foundation and connection to service
facilities and which conforms to the CAN/CSA-Z240 MH standard.
4. SPECIFICATIONS
Color
Grey
Thermostatic control
Yes
Door type
Single, glass with cast iron frame
Glass type
Ceramic glass
Hot air plenum –dimensions (Depth or Height)
32 1/8 in
Hot air plenum –dimension (Width)
25 3/8 in
Ash pan –dimensions (Width x Depth x Height)
11 15/16 in x 19 5/8 in x 2 5/8 in
Clearance –front
48 in
Clearance –back wall
12 in
Clearance –side wall
6 in
Clearance –opposite side wall
24 in recommended service clearance
Clearances –ducts
6 in for the first 6 feet with heat shield and 1 in after
Fresh air intake adapter option
5 in
Fresh air intake adapter –connection location
Left or right
Fresh air intake adapter –connecting pipe diameter
6 in
Tested and listed as per applicable standards
By an accredited laboratory (CAN)
Warranty
Limited lifetime

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5. Label plate

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6. MAX CADDY ADD-ON TECHNICAL DATA
MODEL
TEMP
VAR.
STATIC PRESSURE
(OF)
MIN.
MAX.
INCH H2O
MAX CADDY ADD-ON (SERIE)
100
0,2
0,5
7. ADD-ON DIMENSIONS
TOP VIEW
FRONT VIEW
SIDE VIEW

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8. CHIMNEY AND DRAFT
This add-on must be connected to a chimney certified for use with wood burning heating appliances. A 6-inch chimney
is recommended.
The unit is not to be connected to a chimney flue serving another appliance. If the chimney draft exceeds 0.06 IN.W.C.,
a barometric draft control should be installed on the smoke pipe. Never install a manual damper. The barometric
control must be adjusted so that the maximum draft measured at the add-on outlet does not exceed -0.06 IN.W.C.
Please note that a draft exceeding 0.06 IN.W.C. could produce an uncontrollable fire. On the other hand, the
minimum draft required is 0.04 IN.W.C. The adjustment should in no case be modified to increase combustion.
9. SAFETY RULES
WARNING:
THE INFORMATION GIVEN ON THE CERTIFICATION LABEL AFFIXED TO THE APPLIANCE ALWAYS
OVERRIDES THE INFORMATION PUBLISHED, IN ANY OTHER MEDIA (OWNER’S MANUAL, CATALOGUES,
FLYERS, MAGAZINES AND/OR WEB SITES).
9.1. GENERAL REQUIREMENTS
•MAKE SURE THE CHIMNEY OUTLET AND THE PIPES ARE CLEAN AND IN GOOD CONDITION.
•DO NOT USE CHEMICAL PRODUCTS OR LIQUIDS TO LIGHT THE FIRE.
•DO NOT BURN WOOD COATED WITH PAINT, GLUE OR CHEMICAL PRODUCTS.

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•DO NOT BURN WASTES OR FLAMMABLE LIQUIDS SUCH AS GASOLINE, NAPHTHA, MOTOR
OIL, OR OTHER UNSUITABLE MATTERS.
•DO NOT STORE WOOD IN THE VICINITY OF THE ADD-ON. RESPECT THE REQUIRED
CLEARANCES BETWEEN COMBUSTIBLE MATERIALS AND THE SOURCE OF HEAT.
WARNING:
THE ASH DRAWER AND EXCHANGERS ACCESS PANEL GET VERY HOT. DO NOT MANIPULATE WITH BARE
HANDS.
9.2. ODOUR FROM THE PAINT
It is normal that smoke and odours emanate from the unit when you first light it. It is recommended to burn it at high
rate and ventilate the building until the odours disappear. The smoke is not toxic. This should be done before the
ducts are connected to the add-on to prevent smoke dispersion in the house.
9.3. ASH DISPOSAL
Ashes must be placed in a metal container with a tight fitting lid. The container should be stored outdoor, well away
from combustible materials. This container should not contain any other type of waste. If the ashes are meant to be
buried in soil, wait until all embers have thoroughly cooled before burying.
9.4. CREOSOTE BUILD-UP AND REMOVAL
When wood is burned slowly, it produces tar and other organic vapours which, when combined with moisture, form
creosote. The creosote vapours condensate in a relatively cool chimney flue. As a result, creosote residues
accumulate inside the flue lining and the exchangers.
N.B.: To minimize the frequency of the chimney cleaning, buy your firewood at least one year before using it. Store it in
a dry place in order to obtain the minimum moisture rate and optimize the efficiency. Do not store wood or combustible
materials within the installation minimum clearances or the space required to reload the appliance and remove ashes.
When ignited, creosote produces an extremely hot fire inside the chimney.
In the first year of use, inspect the chimney system at regular intervals to determine a cleaning cycle. Depending on the
type of wood used and its quality, a semi-annual cleaning may be required. A yearly cleaning is mandatory. If a
significant layer of creosote has accumulated, it must be removed immediately to eliminate the risk of chimney
fire.
Remember that a small, hot fire is preferable to a large smouldering one to prevent creosote build-ups within the
system. Prepare an emergency procedure in case of a chimney fire. It is recommended to clean the heat
exchangers thoroughly at the end of season in order to prevent corrosion.
9.5. SMOKE DETECTOR
We highly recommend the use of a smoke detector. It must be installed at least 15 feet (4,57 m) from the appliance in
order to prevent undue triggering of the detector when reloading.
9.6. DOOR GLASS
To maintain a clean and safe installation, do not build your fire too close to the glass or allow logs to lean on the glass.
Do not operate your add-on at too low a setting. Keep the air inlet opened long enough during the fire start-up to
prevent the fire from smouldering, which could stain the glass.
An intense fire will help keep the glass clean. However, in the event that your glass gets stained, which should not
occur under normal operating conditions, you will have to clean it using a wet cloth and a fireplace glass cleaner. Clean
the glass ONLY when the unit has cooled down. Do not use abrasive cleanser.
WARNING: Avoid knocking or scratching the glass. It could crack or break.
9.7. GLASS SPECIFICATIONS
The glass is made of 5/32" (4 mm) thick ceramic glass.
Do not operate your wood add-on with a broken glass, as this could seriously damage your add-on. You can purchase
a replacement glass from your PSG dealer.

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9.8. ASH DRAWER
Your add-on is equipped with an ash drawer to collect ashes produced by the combustion of wood. This drawer must
not be left open during combustion as this may cause over firing and serious damages to the add-on. Moreover, the
additional air created could cause the dispersion of ashes in the ventilation system. The drawer must be cleaned
regularly. Use a vacuum cleaner to remove any ashes around the drawer in order to avoid the dispersion of
ashes in the ventilation system.
It is important that the door and the ash drawer be kept closed while the appliance is in use.
Maintain all gaskets in good condition; in case of deterioration, contact your dealer for a genuine
replacement gasket.
9.9. ASH GRATE
You must replace the ash grate if it is damaged and a replacement may be obtained from your dealer.

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INSTALLATION
AND OPERATION INSTRUCTIONS
MAX CADDY ADD-ON
(SERIAL INSTALLATION FOR CANADA ONLY) PF01102

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10. SAFETY PRECAUTION
CAUTION
THE OPERATION OF A GAS ADD-ON MUST BE VERIFIED FOR ACCEPTABLE OPERATION BEFORE AND
AFTER INSTALLATION OF THE MAX CADDY ADD-ON APPLIANCE BY A GAS FITTER WHO IS
RECOGNIZED BY THE REGULATORY AUTHORITY.
CAUTION
DO NOT CONNECT TO ANY GAS ADD-ON THAT HAS NOT BEEN CERTIFIED INITIALLY AS COMPLYING
WITH CGA STANDARD CAN/CGA-2.3 OR ITS PRECEDENTS.
11. INTRODUCTION
The wood burning MAX CADDY Add-on is approved for in-line connection to an existing oil furnace or any gas or
electric furnace with a maximum heating capacity of 120,000 BTU/h. (35.17 kW)
11.1. BLOWER OF THE EXISTING FURNACE
The theoretical air flow of the blower from the existing furnace should be at least 2100 CFM. When the blower is under
load with static pressure adjusted between 0.2-0.5’’ wc the blower CFM must be at least 1260 CFM.
Some adjustment on the motor and blower of the existing furnace may be necessary. In this case, the following rules
apply:
•On a belt-driven system, blower pulleys and motor pulleys may be changed to do the adjustment.
•On a direct-drive system, the motor shall not be changed; however, the speed of the motor may be increased or
decreased.
CAUTION
THE BLOWER OF THE EXISTING FURNACE ITSELF SHALL NOT BE CHANGED.
WARNING
THE ELECTRICAL CURRENT FLOWING THROUGH THE BLOWER MOTOR SHALL NOT EXCEED THE NAME
PLATE RATING.
12. APPLIANCE INSTALLATION
If the exiting furnace must be modified, the following standards must be respected:
Wood-oil
•NFPA 31: Standard for the installation of oil-burning equipment.
•CSA B.139: Installation code for oil-burning equipment.
Wood-gas
•National Fuel Gas Code, ANSI Z223.1/ NFPA 54.
•CAN/CGA-B149.1 & CAN/CGA-B149.2 : Natural Gas & Propane Installation Code et Propane Storage & Handling
Code.
12.1. MATCHING THE TRANSFER DUCT BETWEEN THE TWO HEAT GENERATORS
This add-on is certified only for installation in configuration presented in OPTION 1, 2, 3 and 4 of this section.
Configurations presented in Examples 1 and 2 of this section are prohibited.
Install the plenum and heating ducts in line as in OPTION 1 of this section. Series connection (OPTION 2)should be
considered ONLY if in line connection (OPTION 1) is not possible.
If the ducts are installed in series (OPTION 2) and the existing furnace’s fan limit control is mounted on the plenum, the
divider in the plenum must be installed at least 5" (127 mm) above the fan limit control. This divider must be air tight.

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OPTION 3 and OPTION 4 are permitted when installing the MAX CADDY add-on with an existing furnace whose hot
air plenum ducts are downwards flowing. The hot air plenum of the MAX CADDY add-on must be above the add-on
and cannot be directed downward.
Do not install connecting ducts in a way that would allow inversion of the air flow (see example 1 and 3).
The transfer duct between the existing furnace and the add-on must be at least 540 square inches (0.35 m2) and
deviations radius must be at least 6" (152 mm). (See OPTION 1 and 2).
Option 1
Option 2
*Minimum duct size 540
square inches (0.35 m2)
*R = Minimum radius 6 inches
MAX CADDY
MAX CADDY

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Option 3
Option 4

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EXAMPLE 1
EXAMPLE 2
WARNING
DO NOT REMOVE, RELOCATE OR BYPASS ANY OF THE SAFETY CONTROLS IN THE
ORIGINAL FURNACE INSTALLATION.
Prohibited
Prohibited
Prohibited

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You must determine the air flow through the existing furnace before installing the MAX CADDY add-on:
1. Run the add-on to which the MAX CADDY add-on is connected until it reaches its regular heating temperature.
2. With a thermometer, measure the temperature of the fresh air entering the furnace and that of the air exiting the
add-on in the hot air plenum.
Note: There can be a large lag in the readings of many commercially available thermometers. Give them adequate
time to stabilize when taking temperatures.
The temperature rise is obtained by subtracting the cold air return temperature from that of the air exiting in the hot air
plenum. The result (t) will be needed for next step.
3. Make the following verifications:
Existing oil, electric or gas furnace:
Q= ______q_____
1.08 x (T2 –T1)
Q = Flow in cubic feet/min
q = Heat flow in BTU/h
T1= Fresh air return temperatureoF
T2= Hot air outlet temperatureoF
12.2. MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS AND FLOOR PROTECTION
N.B.: This appliance must be installed in accordance with the instructions on the certification plate
applied on the unit.
12.3. INSTALLING THE CONNECTING DUCT FROM THE EXISTING FURNACE
To install the connecting duct from the existing furnace on the left or right side of your Max Caddy Add-on, remove the
screws (A) securing the large panel (B or C) of the add-on. Connect the ducts.

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12.4. PIPE CONNECTOR AND DAMPER
The Max Caddy Add-on must be connected to a duct system and chimney that are in good condition and suitable for
wood burning. the use of a 6" connecting pipe and chimney is recommended. It is strictly forbidden to connect a
solid fuel burning appliance to a chimney already connected to a propane or natural gas appliance. Regulation
CAN/CSA B365.1
12.5. ELECTRICAL CONNECTIONS
See Section 15.11 - ELECTRICAL CONNECTIONS
12.6. SERVOMOTOR INSTALLATION
See Section 14.5 SERVOMOTOR INSTALLATION AND CONNECTION THERMOSTAT INSTALLATION
12.7. OPERATING INSTRUCTIONS
Operate the existing furnace periodically to ensure that it will operate satisfactorily when needed.
On the wood add-on, the thermostat controls the air inlet damper. When the thermostat calls for heat, the damper
opens and the combustion is stirred up. When the add-on gets hot enough, the RTD probe activates the blower motor
of the existing furnace at the speed selected for wood heating.
When there is no call for heat, the air inlet damper must be completely closed and the chain must be affixed to the
damper motor at the “8 o’clock” position.

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13. ELECTRICAL DIAGRAM FOR SERIAL ADD-ON (VIA CONTROL)
Important Note:
It is essential to use the three (3) SBI # 51035 relays to make the connection as in 3-relay diagrams. It is possible to
use only two relay White Rodger (SPNC / SPNO # 90-380) for the two-relay diagram. The use of another brand or
model of relay is not recommended since very limited technical support may be provided.
REQUIRES 3 RELAYS (51035) (NOT INCLUDED).