21 E. Applications Figure 10 - Piping Symbol Legend whl-648 Rev. 000 Rel. 003 Date 3.6.
2 Figure 11 - Primary / Secondary Piping with Zone Valves - DHW Priority and Outdoor Reset NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4.
23 Figure 12 - Primary / Secondary Piping with Pumps - DHW Priority and Outdoor Reset NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4.
24 Figure 13 - Primary / Secondary Piping with Pumps - DHW Priority and Outdoor Reset with Recirculation NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4.
25 Figure 14 - Primary / Secondary Piping with Pumps - DHW Priority and Outdoor Reset with Recirculation and Boiler Primary Pump NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4.
26 Figure 15 - Primary / Secondary Piping with Pumps - DHW Priority and Outdoor Reset - Floor Model NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4.
27 Figure 16 - Primary / Secondary Piping with Pumps - DHW Priority and Outdoor Reset with Recirculation and Boiler Primary Pump - Floor Model NOTES: 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4.
28 G. CH and DHW Pressure Relief Valves An external pressure relief valve must be installed on this appliance for both the CH and DHW loops. When installing, observe the following guidelines. Pressure relief valves must be installed as close to the appliance as possible. No other valves should be placed between the pressure relief valve and the appliance. Failure to comply with these guidelines can result in substantial property damage, personal injury, or death.
29 Part 5 - Venting The appliance must be vented as detailed in this section. Ensure exhaust vent and intake piping complies with these instructions regarding vent system. Inspect finished exhaust vent and intake piping thoroughly to ensure all joints are well secured, airtight, and comply with all applicable code requirements, as well as the instructions provided in this manual. Failure to properly install the vent system will result in severe personal injury or death. A.
30 B.
31 D. Exhaust Vent and Intake Pipe Location INSIDE CORNER DETAIL G E A H E B B E OPERABLE C FIXED CLOSED FIXED CLOSED D E E I E OPERABLE F M I B E K E E E I B J A K I B L LP-179-CC 03/28/17 E Exhaust Vent Terminal I Intake Pipe Terminal Area Where Intake Terminal Is Not Permitted Figure 18 - Exit Terminals for Direct Vent Systems - ANSI Z223.1 / NFPA 54 for US and CAN/CSA B149.
32 NOTE: Clean and dry the appliance connection. DO NOT use primer or cement on the appliance connection. 1. The exhaust vent and intake pipe size is 3”. 1. Push the length of pipe into the connection until it touches 2. The total equivalent length of 2” exhaust vent and intake pipe should the bottom of the fitting. not exceed fifty (50) feet; 3” exhaust vent and intake pipe should not 2. Tighten the clamps using a screwdriver. exceed one hundred (100) feet. 3.
33 9. Horizontal lengths of exhaust vent must slope back towards the appliance not less than ¼” per foot to allow condensate to drain from the vent pipe. 10. The exhaust vent must terminate where vapors cannot make accidental contact with people or pets, or damage shrubs or plants. 11. In vacant chimney applications, install and seal a rain cap over existing chimney openings. 12. All piping must be fully supported.
34 Two Pipe Sidewall Venting with Elbow (Intake) and Coupling (Exhaust) EXTERIOR WALL 1" MIN. 12" MIN.
35 EXHAUST A AIR INTAKE B FRONT VIEW 24.00 C Exhaust D EXHAUST Intake E AIR INTAKE LP-325-PP 03/31/11 SIDE VIEW F LP-325-OO 02/04/15 Figure 23 - Horizontal (Snorkel) Venting NOTES: A. For every 1” of overhang, the exhaust vent must be located 1” vertical below overhang (overhang means top of building structure and not two adjacent walls [corner of building]). B. Typical installations require 12” minimum separation between bottom of exhaust outlet and top of air intake. C.
36 2. Venting Through an Existing System This appliance may be vented through an existing unused vent system. The inner diameter of the existing vent system is utilized for the combustion air source. Two methods have been approved for such venting: Concentric Venting Through an Existing System and Venting as a Chase. (LP-166) for further information on venting with the optional concentric vent kits. Concentric venting through an existing system must run vertically through the roof.
37 3. Power Venting, Indoor Combustion Air in Confined or Unconfined Space This appliance requires fresh, uncontaminated air for safe operation with doors, are considered part of the space. and must be installed in a mechanical room where there is adequate Confined space is space with volume less than 50 cubic feet per combustion and ventilating air. NOTE: To prevent combustion air 1,000 Btu/hour (4.8 cubic meters per kW) of the total input rating of contamination, see Table 6.
38 Part 6 - Installing the Condensate Drain This condensing high efficiency appliance has a condensate removal system. Condensate is water vapor derived from combustion products, similar to that produced by an automobile when it is initially started. It is very important that the condensate line is sloped down away from the appliance and to a suitable drain. The condensate line must remain unobstructed.
39 Part 7 - Connecting Electrical Service Install wiring and electrically ground appliance in accordance with the authority having jurisdiction or, in the absence of such an authority, follow the National Electrical Code, NFPA 70, and/ or CSA C22.1 Electrical Code-Part 1 in Canada.
40 Figure 33 - Electrical Wiring Diagram whl-648 Rev. 000 Rel. 003 Date 3.6.
