Prefabricated Fireplace Installation
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Modification Steps:
1.Remove any fuel grate or other components attached attached to the firebox. On most models the firegrate is attached to the unit with brackets which should be cut or pried off.
2.Remove the damper assembly. This includes the damper blade, handle and any linkage. Two 3” liners must be able to pass through the damper area.
3.Remove any firescreen or door assembly. This is usually done by removing a support rod on the inside of the fireplace frame.
4.If there is a metal ashlip, it too should be removed to allow the unit to sit flat in the fireplace. Be sure to reinstall any screws removed.
IMPORTANT:
BEFORE STARTING THIS INSTALLATION, MAKE SURE THAT A GAS LINE CAN BE INSTALLED OR IS INSTALLED TO THE FIREBOX. THIS SHOULD ONLY BE DONE BY A QUALIFIED OR LICENSED PLUMBER OR GAS FITTER.
The GI425 DV Camden gas insert is specifi- cally designed to be vented using a
Installation includes a pair of 3” flex ducts that run from the insert completely through the existing chimney to the termination cap. See figure 8.
One liner is attached to the exhaust port on the back of the unit and will carry the exhaust gases to the outside of the house. This exhaust liner must be directly connected to the unit and run the full length of the chimney.
IMPORTANT NOTICE:
THE USE OF AN EXISTING CHIMNEY AS AN AIR INTAKE IS NOT COVERED UN- DER THE ANSI
M99 TEST METHODS AND RESULTING ITS/WHI PRODUCT CERTIFICATION. THE CODE AUTHORITY HAVING JURIS- DICTION MUST BE CONSULTED PRIOR TO PROCEEDING WITH THIS INSTALLA- TION METHOD.
The other 3” liner will be attached to the intake port on the back of the unit and will provide fresh air for combustion to the unit. This liner must extend a minimum of 6’ off the back of the unit and extend through the damper area of the fireplace and into the first section of pipe. This liner can also extend the full length of the chimney and connect to the termination cap. See figure 10.
IMPORTANT:
If the intake flex does not extend the full length of the chimney and connect to the unit and the termi- nation cap - THEN A METAL BLOCK OFF PLATE MUST BE CONSTRUCTED AND INSTALLED ABOVE THE UNIT PRIOR TO THE END OF THE INTAKE FLEX (normally at the damper area).
To avoid cross venting the insert- always label the flex to be used for the exhaust conduit at both the top and bottom ends of the flex. This ensures that the exhaust flex is installed to the proper outlet on the chimney termination kit.
The minimum vent height above the roof or adjacent walls is specified by major building codes. A general guide to follow is the Gas Vent Rule below.
GAS VENT RULE
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| Minimum Height |
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| ROOF SLOPE |
| From Roof |
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| Flat to 6/12 |
| 1’0” |
| 0.3M |
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| Over 7/12 to 9/12 |
| 2’0” |
| 0.6M |
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| Over 10/12 to 12/12 |
| 4’0” |
| 1.2M |
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| Over 13/12 to 16/12 |
| 6’0” |
| 1.8M |
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| Over 17/12 to 21/12 |
| 8’0” |
| 2.4M |
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CANADA REQUIREMENT: Both the Intake and the Exhaust liners must extend the full length of the chimney and be securely connected to both the unit and the termina- tion kit.
If the fireplace has been modified to accom- modate installation, use anchors or masonry nails to attach the metal Fireplace Conver- sion Notice Plate supplied with this unit to the back wall of the masonry fireplace firebox where it will be readily seen should the insert be removed.
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