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Summary of Contents for BOCK OptiTHERM OT125
- Page 1 Common Vent Kit Installation Manual For 2 or 3 OptiTHERM Models OT125-199 Rev 0 02/03/2021 Page 1...
- Page 2 The proper installation, use and servicing of this water heater is very important to your safety and the safety of others. This is the safety alert symbol. Statements following this symbol contain important safety information. Obey all safety messages that follow this symbol to avoid possible injury or death.
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Page 3: Table Of Contents
Supplemental Information ........................4 III. Overview ............................4 Definitions ............................4 Configurations ........................... 5 Bock OptiTherm Common Vent Kit – Parts List ..................8 Optional Connector and Header Parts: ..................... 9 Installation Instructions ......................... 10 Pre-Installation ............................10 Polypropylene Pipe Connections ......................15 Gasket Placement .......................... -
Page 4: Introduction
Introduction The Bock OptiTherm Common Vent Kit can be used to direct vent up to three appliances in the model category OT125-OT199 provided they use the same fuel type and are not high altitude versions. This document describes two heater direct vent, and three heater direct vent kits. -
Page 5: Configurations
Figure 1: Connector, Header, Common Vent, Manifold Diagram. b. Configurations There are two configurations for proper installation of the Bock Common Vent Kit which allow you to configure two or three heaters. Standard heater spacing is 40” apart (center to center). - Page 6 Figure 2: Common Vent Kit assembly, 3 heater configuration Page 6...
- Page 7 Figure 3: Common Vent Kit assembly, 2 heater configuration Page 7...
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Page 8: Bock Optitherm Common Vent Kit - Parts List
Bock OptiTherm Common Vent Kit – Parts List The parts list below includes all the polypropylene vent parts necessary to connect two or three heaters to the common vent. These parts are necessary for the headers and connectors. Some non-polypropylene parts are also necessary for proper installation. These are either shipped with the heater or are field supplied. -
Page 9: Optional Connector And Header Parts
Optional Connector and Header Parts: In some cases, additional parts may be necessary to properly create the connectors and headers based on your application. • If the heaters must be spaced farther than 41” apart, an additional 6” X 1’ polypropylene piece (PN: 24262) will be needed to accommodate the increased distance. -
Page 10: Installation Instructions
(PN: 24262) between the branch tees. The spacer piece must be purchased separately from the Bock Water Heaters website. Failing to add this spacer piece will add stress to the joints, could adversely affect condensate drainage, prevent proper connections, or allow the connections to fail. - Page 11 including the headers and connectors). See Table 3 for the equivalent lengths of several parts which may be required to properly vent the heaters. Table 3: Common vent equivalent length requirements Minimum Maximum Fuel Kit Size Vent Section Diameter (in) Equivalent Equivalent Type...
- Page 12 Figure 5: Intake manifold: See Table 4 for part number list Page 12...
- Page 13 Figure 6: Exhaust manifold: See Table 4 for part number list Page 13...
- Page 14 Table 4: Manifold parts, two and three heater configurations. ITEM PART Three DESCRIPTION NUMBER Heater Heater Optitherm Water Heater (125,000-199,000 25640 BTU/hr) Condensate Assembly 19986 Gen 2 24246 PVC-PP Adapter 3" 3" Flue Clamp PVC to 24250 Non Return Valve - 3"- 24220 4"...
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Page 15: Polypropylene Pipe Connections
Gaskets are factory installed in all components If a gasket is missing or damaged, it must be replaced by the correctly sized gasket. Contact Bock Customer service. If a gasket must be replaced, ensure both the gasket bead and the gasket... -
Page 16: Joint Connections
Joint Connections The female end of each polypropylene vent and fitting includes a factory installed gasket. Before making a polypropylene-to-polypropylene connection ensure the gaskets are correctly in place. Measure the depth of the female socket and mark the male end of each component at that distance to allow a reference. -
Page 17: Exhaust Connectors And Header
appliance outlet, adapter, and flue clamp. Tighten the worm gear on the flue clamp to secure it to the outside of the 3” PVC appliance outlet and line up the retaining brackets with the ledge on the adapter so the adapter is properly secured. Figure 10: Flue Clamp Installation Exhaust Connectors and Header Complete the following steps for each water heater to construct the exhaust connectors. - Page 18 • Optional: Extend the vertical pipe with an additional 4” pipe up to 3’ in length (PN: 24268). Lock in place with a clamp ring (Item 11). • Insert a polypropylene elbow (4” X 87°) (Item 10) into the top of the vertical pipe. Lock in place with a 4”...
- Page 19 Complete the following steps to construct the exhaust Header, refer to Figure 12 for an overall view of the header and components: NOTE: It may be easier to measure the center-center heater space by measuring from two equal points on each heater provided they are pointing in the same direction. For example, after installing the standard condensate elbow, measuring between the outlets will provide the correct center-center distance.
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Page 20: Intake Connectors And Header
Figure 12: Exhaust header components explosion Table 6: Exhaust header components. ITEM PART NUMBER DESCRIPTION John Ball Valve 24244 Condensate Trap 24254 4" Locking Clamp Ring Branch Tee, 6" X 40", 4" 24240 feeder. Horizontal Drain Fitting - 24242 6" Common Vent Drain Line, 11/16”... - Page 21 • Insert a 3” to 4” polypropylene increaser (Item 15) into the female end of the intake drain elbow. Lock in place with a 3” clamp ring (Item 7). • Insert a 4” X 6’ polypropylene pipe (Item 9) into the polypropylene increaser (Item 15). Lock in place with a 4”...
- Page 22 Complete the following steps to construct the exhaust Header, refer to Figure 14 for an overall view of the header and components: • When heaters are spaced farther than 41” apart (not to exceed 52” apart): Use a spacer piece to extend the branch tees to match center-to-center heater spacing. Remove excess material from the male end of the branch tee (Item 12), to account for the extra distance between heaters.
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Page 23: Condensation Management
The Bock Common Vent Kit also has several locations for condensation management. Both vent headers are capped on the male end with a horizontal drain tee. After installation, the drain shall point down and have an exhaust trap installed. - Page 24 Figure 15: Common Vent Drain Condensation can form in the intake common vent during periods of standby and it must drain properly. The Common Vent Kit includes adapting drain elbows (Item 14) for installation on the intake side of each water heater. On the drain barb (13/16”) of this elbow install a drain line with a loop to trap moisture and route to an adequate floor drain.
- Page 25 Figure 16: Intake Drain Horizontal sections of the exhaust vent shall slope upward away from the water heater a minimum of 1/4” per foot. This will allow the condensate in the vent to run back to the condensate drains on the water heaters, and in the common vent header. In some instances, condensate may form in the intake piping during periods following burner operation.
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Page 26: Common Vent
Bock Water Heaters can supply an approved polypropylene to PVC termination adapter (PN 24280). Both schedule 40 PVC and SDR Series CPVC are compatible with this termination adapter. -
Page 27: Terminations
NOTICE Installations in Canada must conform to the requirements of CSA B149 code. Plastic vent systems must be assembled with pipe, fittings, cements, and primers listed to ULC S636. Components of this listed system shall not be interchanged with other vent systems or unlisted pipe/fittings. - Page 28 must have the same diameter size. DO NOT use a different size on the intake and exhaust venting. Figure 17: Terminal Clearances Page 28...
- Page 29 Table 9: Vent Terminal Clearances Page 29...
- Page 30 The Bock Common Vent Kit includes an appropriate 6” vent screen (PN 24286) for use with a polypropylene elbow. If your common intake and exhaust vents are comprised of an approved vent material other than polypropylene, an appropriate 6”...
- Page 31 This elbow and other fittings which might be required must be purchased separately. The Bock Common Vent Kit contains a protective screen (for 6” polypropylene pipes) to block foreign debris or small animals from entering the intake pipe.
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Page 32: Maintenance
Maintenance NOTICE TO THE OWNER: If you are having a mechanical problem with your water heater or vent, contact your service company or installer The required maintenance schedule for this Common Vent Kit is shown in Table 10. Further detail is given in this section for each component. -
Page 33: Combustion System
The combustion system can be maintained according to the maintenance section in the standard installation manual. The Bock Common Vent Kits include a test port for each water heater connector which shall be installed into the non-return valve. When taking a combustion reading, remove the thumb screw in the test port to insert the combustion analyzer. -
Page 34: Warranty
Phone: 608-257-2225 WHAT DOES THIS LIMITED WARRANTY COVER? Common Vent Kit and Materials: Bock Water Heaters Inc warrants that the materials provided in the Common Vent Kit, and other polypropylene vent materials purchased separately through Bock Water Heaters Inc. which are specifically called out in this manual are free of defects in material, manufacturer’s...
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