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11 SAFETY PRECAUTION
CAUTION! THE OPERATION OF A GAS FURNACE MUST BE VERIFIED FOR ACCEPTABLE OPERATION
BEFORE AND AFTER INSTALLATION OF THE CADDY ADVANCED ADD-ON APPLIANCE BY A GAS FITTER
WHO IS RECOGNIZED BY THE REGULATORY AUTHORITY.
CAUTION! DO NOT CONNECT TO ANY GAS FURNACE THAT HAS NOT BEEN CERTIFIED INITIALLY AS
COMPLYING WITH CGA STANDARD CAN/CGA-2.3 OR ITS PRECEDENTS.
12 INTRODUCTION
The wood burning Caddy Advanced Add-on furnace 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).
Option PA08523 is required for serial add-on installation. Consult the sheet provided for this
purpose.
12.1 BLOWER OF THE EXISTING FURNACE
The theoretical air flow in the hot air plenum blower of the existing furnace must be at least 875 CFM when the external
static pressure is adjusted to 0,2" and to 0,5" of water column.
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.
13 APPLIANCE INSTALLATION
If the existing furnace must be modified, the following standards must be respected:
Wood-oil: CSA B.139: Installation code for oil-burning equipment.
Wood-gas: CAN/CGA-B149.1 & CAN/CGA-B149.2: Natural Gas & Propane Installation Code et Propane Storage &
Handling Code.
13.1 MATCHING THE TRANSFER DUCT BETWEEN THE TWO HEAT GENERATORS
This furnace 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.
OPTION 3 & OPTION 4 are permitted when installing the Caddy Advanced furnace with an existing furnace whose hot
air plenum ducts are downwards flowing. The hot air plenum of the Caddy Advanced furnace must be above the furnace
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 190 square inches (0.12 m
deviations radius must be at least 6" (152 mm). (See OPTION 1 & 2).
18
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