Installation Guide

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Technical Bulletin

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Tips for a Successful Installation

Selkirk’s Saf-T Vent systems are Special Gas Vent systems designed to meet the unique venting challenges

presented by positive-pressure, condensing gas-fired appliances.

Saf-T Vent systems have been successfully installed in thousands of residential, commercial and industrial

settings with a track record of superior performance dating back nearly 20 years.

As part of our effort to continuously improve the products we manufacture, Selkirk has performed extensive

testing, visited job site installations and listened to countless installers. The information we have gathered has

prompted us to write this bulletin which highlights important installation practices that lead to gas-tight,

leak-proof, properly installed systems.

Key Points

1. Read & follow the appliance manufacturer’s instructions.

2. Read & follow Selkirk’s instructions.

3. When RTV Sealant is required, apply it correctly.

4. Secure the joint!

5. Get going in the right direction – Follow the flow arrows.

6. Maintain proper slope – Install with a continuous ¼” per foot (minimum)

slope back to the appliance.

7. Drain the condensate.

8. Provide adequate support – Support after every offset or elbow, after every 6 feet of horizontal run,

after every 30 feet of vertical run, and at each adjustable fitting.

9. Inspect annually.

1. Read & Follow the Appliance Manufacturer’s Instructions.

• Manufacturers develop and test their appliances to operate efficiently and safely when vented

properly. Many appliance installation manuals will give instructions on the maximum number of offsets

or elbows as well as the total equivalent length of vent allowed. Always refer to the manufacturer’s

manuals for guidance.

• Common venting of appliances is permitted only when allowed by the appliance manufacturer(s).

•

Some appliances must be vented with double-wall Saf-T Vent CI Plus. If the manual does not

distinguish between single-wall and double-wall, call us for a recommendation.

•

Manufacturer’s instructions supercede Heatfab manuals.

•

Clearance requirements outlined in the appliance manufacturer’s manuals must be followed. Their

clearances and/or national and local code requirements take priority over Heatfab instructions.

Summary of content (9 pages)

PAGE 1
Technical Bulletin Tips for a Successful Installation Selkirk’s Saf-T Vent systems are Special Gas Vent systems designed to meet the unique venting challenges presented by positive-pressure, condensing gas-fired appliances. Saf-T Vent systems have been successfully installed in thousands of residential, commercial and industrial settings with a track record of superior performance dating back nearly 20 years.
PAGE 2
Technical Bulletin 2. Read & Follow Selkirk’s Instructions. • • • • • Installation and Maintenance Instructions for Saf-T Vent systems are packaged with critical components (elbows, tees, and terminations), as are other supplemental instruction sheets for the critical component itself. Accessories (roof jacks, vertical supports, and wall penetrations) come with detailed instructions specific to their proper installation. If you have questions on correct installation methods, call us.
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Technical Bulletin • When assembling elbows and tees, the male end tabs will rotate around the vent to accommodate offsets and direction changes. Position the Mechanical Locking Strap over the Tabs, making sure each slot encompasses both Tabs, and then tighten. Center the Coupler Band around the completed joint and tighten. DO NOT use screws or pop rivets when joining Saf-T Vent systems! EXCEPTION: Saf-T Vent SC is designed to be assembled with the use of tap screws, which are included with each part. 5.
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Technical Bulletin 7. Drain the Condensate. • • • • • Follow the appliance manufacturer’s installation instructions. Some require condensate drains only for vent systems over a certain length. If a drain is required, Selkirk recommends: Drains at all transitions from horizontal to vertical vent runs. Immediately before a horizontal termination. After every 30 feet of continuous vent. The first drain should be as close to the appliance flue collar as possible.
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Technical Bulletin 9. Inspect Annually. • • • • During your annual HVAC equipment and system check, inspect the vent system. Make sure the system has not been damaged, the vent has not been punctured and the supports are solid. Look for the proper slope toward a drain. Make sure drains are not clogged or pinched off, and are in the proper place. Verify that all drain traps are properly primed. Inspect the termination and remove any accumulated debris.
PAGE 6
Technical Bulletin Connecting Saf-T Vent® EZ Seal to Appliances and Other Saf-T Vent Products EZ Seal IS Compatible with Existing Heat-fab Products. Here’s how: 1. Connecting to an Appliance Flue Collar • If the flue collar that comes with the appliance has Heat-fab’s integral red seal, you may attach EZ Seal pipe and fittings directly to it. Make the joint as described in the EZ Seal installation instructions (Pub # PI-EZ). Appliance flue collar has Heat-fab’s integral red seal. No sealant required.
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2. Connecting an EZ Seal Appliance Adapter to the Appliance • If the EZ Seal appliance adapter has been designed for a sealant-free connection to the appliance, it will have an integral red seal in the female end and in the end that attaches to the appliance. EZ Seal adapter with integral red seal on appliance end. No sealant required to attach to flue collar.
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3. Connecting EZ Seal to Saf-T Vent GC (single-wall) or Saf-T Vent CI (double-wall) • Saf-T Vent GC and Saf-T Vent CI lack the integral red seal. When you connect EZ Seal to them you will need to use an approved high-temperature RTV silicone sealant. Follow the procedure outlined in the GC or CI installation instructions (Pub # PI-VBH or PI-CIINS). EZ SEAL SAF-T VENT GC Sealant Required EZ SEAL SAF-T VENT CI 4.
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5. Connecting Saf-T Vent GC or Saf-T Vent CI to EZ Seal • Saf-T Vent GC and Saf-T Vent CI sections and fittings may be attached to an EZ Seal system: • If the male end (without tabs) of the GC or CI part was made with a butt-weld (a single layer of steel at the weld area), the part can be attached to an EZ Seal female end without using sealant.