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Product Manual
WM97+
High Performance
Companion Water Heater
(Boiler sold separately)
This manual must only be used by a qualified heating installer/service technician. Read all instructions, includ-
ing this manual and all other information shipped with the boiler, before installing. Perform steps in the order
given. Failure to comply could result in severe personal injury, death or substantial property damage.
Part number 635-500-156/1113
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Table of Contents
Related Manuals for Weil-McLain Aqua Logic
Summary of Contents for Weil-McLain Aqua Logic
- Page 1 ® Product Manual WM97+ High Performance Companion Water Heater (Boiler sold separately) This manual must only be used by a qualified heating installer/service technician. Read all instructions, includ- ing this manual and all other information shipped with the boiler, before installing. Perform steps in the order given.
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Page 2: Table Of Contents
CONNECTIONS TO BOILER AND SYSTEM ..16 Aqua Logic (CWH) ......3 Aqua Logic (CWH) circulator mounting . -
Page 3: Wm97+ Boiler With Aqua Logic Heater (Cwh)
WM97+ Boiler with Aqua Logic (CWH) Aqua Logic is the brand name for the Companion Water Heater for the WM97+ boiler. In the instruction manuals and boiler controls the abbreviation CWH may be used and is synonymous for Aqua Logic and the Companion Water Heater. -
Page 4: Please Read Before Proceeding
A water softener in the domestic water system is acceptable. and operation guidelines for the Filtration — If domestic water tends to contain sediment, Weil-McLain Aqua Logic (CWH) indi- provide filtration equipment as needed to remove sediment. rect water heater. The installer is respon-... -
Page 5: Pre-Installation
Canada — B149.1 or B149.2 Installation Code. Clearance required (in addition to clearances specified in the WM97+ 2. Aqua Logic (CWH) water heaters are exempt from ASME Section manual) — right-mounted mixing valve VIII, Division 1 Code construction per Interpretation VIII-1-86- 136. -
Page 6: Domestic Water Piping Requirements
WM97+ boiler. Direct water flow away from any person. 2. Verify the fit-up of the piping access panel — the Aqua Logic (CWH) must be directly underneath the WM97+ boiler. Test fit the access panel to be sure before installing piping. -
Page 7: Aqua Logic (Cwh) Mixing Valve
1. The Aqua Logic (CWH) can be installed with its domestic water inlet/outlet connections on the right or on the left. 2. Place the Aqua Logic (CWH) on the floor below the WM97+ boiler. 3. The Aqua Logic (CWH) circulator must be installed on the top left front boiler water connection in all applications. -
Page 8: Domestic Water Piping
— Product Manual OGIC COMPANION WATER HEATER Domestic water piping Piping overview — If a backflow 2. See next page for legend. preventer, check valve, or pressure reducing valve 3. Some codes may require the items listed as optional, such as is piped on cold water inlet of water heater, you a vacuum breaker on the inlet line, or recirculation piping. - Page 9 70 PSIG — A thermal expan Mixing valve hot water inlet port (HOT) — ¾” FNPT sion tank is also required — Connects directly to Aqua Logic (CWH) hot water outlet pipe Unions Mixing valve mixed water outlet port (MIX) — ¾”...
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Page 10: Recirculation (If Used)
— Product Manual OGIC COMPANION WATER HEATER Recirculation (if used) applications require recirculation Time lag to obtain hot water at fixture for piping or heat-traced piping if the distance from the branch lengths of 10 and 25 feet (ASPE water heater to the furthest fixture exceeds 100 feet. Domestic Water Heating Design Manual) Time in seconds required to get hot water at fixture Maintaining domestic water temperature... -
Page 11: Connecting To The Water Heater
Figure 6, page 8. 2. See the following pages for piping between boiler and water heater, boiler lower pipe routing and Aqua Logic (CWH) relief valve. a. WM97+70 or 110 boiler: Mixing valve on right side of CWH: page 12 Mixing valve on left side of CWH: page 14 b. -
Page 12: Boiler/Cwh Piping - 70 Or 110 / Right-Side Mixing Valve 12 Connections To Boiler And System
Installer must provide hard piping or flexible gas line between boiler connection and gas line connection (item 20). T & P relief valve is shipped loose with the Aqua Logic (CWH) for field installation in the location shown on the next page. -
Page 13: Aqua Logic (Cwh) Circulator Mounting
WM97+ Boiler manual. The example shown here is just one pos- sibility. Aqua Logic (CWH) circulator mounting This is required to flow boiler water through the water heater in the correct direction. Rotate the lower circulator flange adapt- er 10°... -
Page 14: Boiler/Cwh Piping - 70 Or 110 / Left-Side Mixing Valve
Installer must provide hard piping or flexible gas line between boiler connection and gas line connection (item 20). T & P relief valve is shipped loose with the Aqua Logic (CWH) for field installation in the location shown on the next page. -
Page 15: Aqua Logic (Cwh) Circulator Mounting
WM97+ Boiler manual. The example shown here is just one pos- sibility. Aqua Logic (CWH) circulator mounting This is required to flow boiler water through the water heater in the correct direction. Rotate the lower circulator flange adapt- er 10°... -
Page 16: Boiler/Cwh Piping - 155 / Right-Side Mixing Valve
(item 20). T & P relief valve is shipped loose with the Aqua Logic (CWH) for field installation in the location shown on the next page. This circulator is shipped loose with the Aqua Logic (CWH). -
Page 17: Aqua Logic (Cwh) Circulator Mounting
WM97+ Boiler manual. The example shown here is just one pos- sibility. Aqua Logic (CWH) circulator mounting This is required to flow boiler water through the water heater in the correct direction. Rotate the lower circulator flange adapt- er 10°... -
Page 18: Boiler/Cwh Piping - 155 / Left-Side Mixing Valve
Installer must provide hard piping or flexible gas line between boiler connection and gas line connection (item 20). T & P relief valve is shipped loose with the Aqua Logic (CWH) for field installation in the location shown on the next page. -
Page 19: Aqua Logic (Cwh) Circulator Mounting
WM97+ Boiler manual. The example shown here is just one pos- sibility. Aqua Logic (CWH) circulator mounting This is required to flow boiler water through the water heater in the correct direction. Boiler water connections... -
Page 20: Wiring
2. Remove the two plastic plugs from the WM97+ jacket bottom (see Figure 16 or Figure 17). 3. Route the tank sensor harness and Aqua Logic (CWH) circulator har- ness through these openings (circulator harness through left opening, sensor through right opening). -
Page 21: Water Heater Filling And Start-Up
Aqua Logic (CWH) circulator. parameters. 2. Fill the Aqua Logic (CWH) tank and domestic water system with fresh domestic water that meets the chemistry requirements below. Verify operation a. Hardness — less than 6 grains/gal. -
Page 22: Aqua Logic (Cwh) Control Quick Set-Up
Aqua Logic (CWH) Performance Mode quick set-up Contractor-selected — Aqua Logic (CWH) operation is disabled; can only be activated by a contractor User-selected — Aqua Logic (CWH) operation turned off; can be turned on by user in the Performance Mode Menu... -
Page 23: Water Heater Maintenance
Call qualified service technician to repair leaks or address problems. ❏ The Aqua Logic (CWH) must use ONLY the cir- culator model supplied with the unit or suggested by Weil-McLain. The circulator is water-lubricated and does NOT require oiling. -
Page 24: Wm97+ Control Settings - Advanced
— Product Manual OGIC COMPANION WATER HEATER WM97+ Control settings — Advanced WM97+ control menu access — accessing contractor menus — press and hold the UP and DOWN buttons for 7 seconds to go from any screen to the CONTRACTOR MENU screen Part number 635-500-156/1113... -
Page 25: Dhw Settings
DHW SETTINGS tions if the Aqua Logic (CWH) temperature sensors 1. If a Aqua Logic (CWH) is used, the settings for control opera- were reading incorrectly and created a constant call tion during Aqua Logic (CWH) calls for heat are set under to the control. - Page 26 — Product Manual OGIC COMPANION WATER HEATER WM97+ Control settings — Advanced (continued) Contractor menus (see Figure 21, page 27 for setting values and descriptions) Part number 635-500-156/1113...
- Page 27 — Product Manual OGIC COMPANION WATER HEATER WM97+ Control settings — Advanced (continued) menus (see Figure 19, page 24 for access information) DISABLED/ Parameters HIGH NORMAL ECONOMY VACATION Description of Parameter — 170°F 150°F 135°F 50°F None Target temperature to modulate boiler output to. Upper Sensor Set Point Boiler will modulate to either BOILER TARGET or DHW Storage Target.
- Page 28 — Product Manual OGIC COMPANION WATER HEATER WM97+ Control settings — Advanced (continued) Contractor menus (see Figure 21, page 27 for setting values and descriptions) Part number 635-500-156/1113...
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Page 29: Troubleshooting
❏ Mixing valve instruction manual ❏ Aqua Logic (CWH) Product manual ❏ Get the latest boiler manual and Aqua Logic (CWH) manual revisions from www.Weil-McLain.com. ❏ Review all manuals before leaving for the job site. Tools needed ❏ Electrical meter to measure voltage and continuity. - Page 30 — Product Manual OGIC COMPANION WATER HEATER Troubleshooting (continued) Typical problems and causes and page location for details Problem Check possible causes Page Undersized water heater? Check for air in the system. High-flow shower heads? Check tank temperature setting. Insufficient Boiler system improperly sized? Check circulator speed.
- Page 31 Economy. Try changing operating mode to “High-performance.” During a call for heat by the water heater, does the Aqua Logic (CWH) circulator begin pumping, does the boiler fire? Check all components in the system to ensure they are properly functioning.
- Page 32 Also check the operating mode. Change mode to “High-max performance” if water heater is set to another mode. 8 Check DHW circulator speed The Aqua Logic (CWH) is supplied with a 3-speed circulator. The speed switch on the circulator must be set to: for WM97+70 or 110 boilers.
- Page 33 DHW connections. (This illustration shows a right-oriented tank.) Check whether sensors are inserted completely into their wells. If not, press in firmly and recheck Aqua Logic (CWH) operation. If sensors are properly inserted in their wells, disconnect each sensor harness and attach an ohmmeter.
- Page 34 Open the water heater drain valve to allow the tank-side pressure to drop. Watch the pressure on the boiler P/T gauge. If this pressure drops noticeably, there is a leak in the piping or in the tank heat exchanger. Locate the problem and correct. Replace the Aqua Logic (CWH) tank if necessary.
- Page 35 — Product Manual OGIC COMPANION WATER HEATER Troubleshooting (continued) Temperature/pressure relief valve lifting or weeping 1 Undersized or missing domestic water side expansion tank? Is there a thermal expansion tank installed on the domestic supply piping and is it properly sized? A thermal expansion tank is required if the domestic supply piping includes a backflow preventer or pressure reducing valve.
- Page 36 Excessive force or water hammer can damage the welds where the piping connections enter the water heater tank. Remove the front of the Aqua Logic (CWH) enclosure to check tank and connections. If water is leaking from around one of the tank connections, a weld may have been broken. Contact your Weil-McLain supplier to determine how to handle the problem.
- Page 37 — Product Manual OGIC COMPANION WATER HEATER Troubleshooting (continued) Water quality problems 1 Water smells like “rotten eggs.” The most common cause of water to smell like “rotten eggs” is a non-toxic sulfate reducing bacteria. The bacteria usually enters into the water system through a break in the supply piping or during construction/maintenance of the supply piping.
- Page 38 — Product Manual OGIC COMPANION WATER HEATER Troubleshooting (continued) Water quality problems (continued) This is similar to the reaction that occurs as air bubbles form on the walls of a pan shortly before the water begins to boil. The release of dissolved gas can also create air pockets and air locks in the water system piping. This can cause spurts of air or gases when opening the hot water faucet.
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Page 39: Replacement Parts
— Product Manual OGIC COMPANION WATER HEATER Replacement parts Water heater replacement parts 100 Tank 635-900-059 110 Jacket front 383-700-211 120 Jacket back 634-200-215 130 Jacket bottom 634-200-216 140 Jacket top 383-700-212 150 Jacket pipe access cover 634-200-218 Jacket retainer magnets (4 563-039-981 required) 170 Leveling legs (3 required) -
Page 40: Determine Required Temperature Rise
— Product Manual OGIC COMPANION WATER HEATER Determine required temperature rise Determine domestic Determine required Determine required water inlet water domestic water outlet domestic water temperature — TI temperature — TO temperature rise — TR T1 is the groundwater temperature typical This is the required temperature exiting The required temperature rise is the differ- for the boiler location. -
Page 41: Ratings
— Product Manual OGIC COMPANION WATER HEATER Ratings 70°F (For DHW entering temperature of 45°F — capacities will decrease at higher DHW inlet water temperatures) (170°F Storage) (150°F Storage) (135°F Storage) GPM @ GPM @ GPM @ GPM @ GPM @ GPM @ GPM @ GPM @... -
Page 42: Ahri Ratings
— Product Manual OGIC COMPANION WATER HEATER ® AHRI ratings Minimum Potable Heat Source Standby Minimum Continuous First Hour Heat Output Heat Source First Draw Water Water Heat Heat Source Draw Rating Rating Rate from Friction Loss Rating Volume Volume Loss Flow Rate Heat Source... -
Page 43: Dimensions
— Product Manual OGIC COMPANION WATER HEATER Dimensions Aqua Logic Dimensions — Companion Water Heater, right-side mixing valve orientation — All dimensions in INCHES Tank can be oriented with DHW inlet/ outlet connections on right or rotated 180° to place DHW connections on the left. - Page 44 — Product Manual OGIC COMPANION WATER HEATER...