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10. SAFETY PRECAUTION
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.
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.
THE BLOWER OF THE EXISTING FURNACE ITSELF SHALL NOT BE CHANGED.
THE ELECTRICAL CURRENT FLOWING THROUGH THE BLOWER MOTOR SHALL NOT EXCEED THE NAME
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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CAUTION
CAUTION
CAUTION
WARNING
PLATE RATING.
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