GC150 SERIES DIRECT VENT GAS APPLIANCE
To install the termination cap, slide the cap vent sections into the vent sections as shown in Figures 10A and 10B. Secure the cap flush to the wall using the eight 1" fasteners provided. Seal the cap to the wall with a mastic such as silicone caulking. Fasten the inner vent with three 1/2" screws to secure the vent. (An optional CS cap shield is required if the cap is located in an area of easy accessibility. See Figure 11.) Vent termination must not be recessed into the wall or siding.
Be sure to follow all termination cap location mini- mum dimensions that have been discussed on the previous page.
Skip section B below and continue with Step 4 on page 13.
B. Vertical Termination
When planning your fireplace location, the vent sys- tem construction and necessary clearances must be considered. The following figures are the maximum distances from the base of the unit, as well as the minimum air space clearances that must be main- tained: Maximum straight unsupported rise - 25 feet; maximum horizontal unsupported run - 3 feet; air space clearances around vertical venting - 1" on all sides; air space clearances around horizontal venting
-3" on top and 1" on sides and bottom; maximum height - 40' from the base of the unit. Every 1' of hori- zontal run requires at least 2' of vertical rise. (Example: a 12' overall installation height may be off- set as much as 6' horizontally.) The maximum is 20 feet.
1.Assembling vent sections. Attach either a 15942B (starter elbow) or straight vent section (depending upon your specific installation) to the top of the appliance. Secure with the three screws supplied. Use only vent supplied with this appli- ance and the appropriate number of direct vent sections. MAINTAIN MINIMUM CLEARANCES
OR GREATER AROUND THE VENT SYSTEM. Do not pack air spaces with insulation or other material.
a. Using elbows. To bypass any overhead obstructions, the vent system may be offset using a 90° elbow (VK5) or a 45° elbow (EL45). Vent stabilizers (VS4) have straps for securing these parts to joists or rafters. Plumbers tape may be purchased locally and used in conjunction with vent stabilizers. See Figure12.
WARNING!
WHEN HORIZONTAL RUNS EXCEEDING 3' IN LENGTH ARE USED BETWEEN AN OFF- SET/RETURN, STRUCTURAL SUPPORT (VS4) MUST BE USED TO REDUCE OFF- CENTER LOADING AND PREVENT VENT SECTIONS FROM SEPARATING.
Figure 10A
Termination Cap
Figure 10B
Proper Positioning of Termination Cap & Shield
Figure 11
Cap Shield
Figure 12
Elbows with stabilizer
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