FAQs

ManualsBrandsWeil-McLain ManualsBoilersWM97+ 155 CT - 124,000 BTU Output Wall Mounted Boiler (NG or LP)

WM97+ Wall Mount Boiler

Questions & Answers

INSTALLATION

1. Can the boiler be installed in a living area?

Yes, the WM97+ is a wall mounted boiler. The sealed combustion and

internal circulator make for very quiet operation.

2. What will be the amount of condensate the boiler produces?

Boiler

Minimum recommended

condensate pump capacity,

per boiler, GPH

WM97+70

WM97+110

WM97+155

3. What is the dry weight of the WM97+?

WM97+ 70 & 110 117 lbs.

WM97+ 155 122 lbs.

4. Can the WM97+ be floor mounted?

No, the boiler is designed to only be wall mounted.

5. Why is Sentinel X-100 Inhibitor provided with the WM97+ boiler?

X100 is meant to provide and maintain total system performance. System

performance requires effective heat emitters (radiant tubing, baseboard,

etc.) as well as high efficiency boilers to be maintained to provide

maximum efficiency and operating savings. X-100 prevents scale and

corrosion in cast iron, aluminum and stainless steel boilers and system

components. It also helps prevent noise and hydrogen gas formation in

hot water heating systems.

Models 70, 110 & 155

Summary of content (5 pages)

PAGE 1
WM97+ Wall Mount Boiler Questions & Answers Models 70, 110 & 155 INSTALLATION 1. Can the boiler be installed in a living area? Yes, the WM97+ is a wall mounted boiler. The sealed combustion and internal circulator make for very quiet operation. 2. What will be the amount of condensate the boiler produces? Boiler WM97+70 WM97+110 WM97+155 Minimum recommended condensate pump capacity, per boiler, GPH 2 3 4 3. What is the dry weight of the WM97+? WM97+ 70 & 110 WM97+ 155 117 lbs. 122 lbs. 4.
PAGE 2
VENTING 1. What vent material can be used on the WM97+ boilers? The boiler is approved to be vented with PVC, CPVC, Polypropylene (PP) or AL29-4C stainless steel. Special PP note: if one wants to sidewall concentric vent the 155 model using Centrotherm’s pipe system (Eco Systems InnoFlue Single-wall), Centrotherm’s stainless steel concentric termination kit must be used. 2. Does a vent/intake termination come with the WM97+ boiler? Yes, the same black 3” PVC sidewall termination as the Ultra gas boiler. 3.
PAGE 3
PIPING 1. What size boiler supply/return piping is recommended for the WM97+ boilers? WM97+70 and 110 utilize 1” piping. WM97+155 utilizes 1 ¼” piping. 2. Can the WM97+ internal circulator be increased in size? No, a Taco 007 IFC (with an integrated flow check) is provided with the WM97+70 and a Taco 0015 IFC is provided with the WM97+110 and the WM97+155 boilers to provide proper flow through the boiler.
PAGE 4
5. How are circulator speeds selected? The WM97+ control can select low, medium, or high speed for the internal circulator on both DHW and Heat settings. Low speed is typical for primary/secondary connection and may be acceptable for very a small zone(s). If in doubt, verify the boiler out and boiler in temperature difference is approximately 30 degrees. Higher speeds will lower the temperature rise through the boiler. 6.
PAGE 5
6. How can priority be turned off on the WM97+ control? Turning the DHW setting to “OFF” will return the control to a 3-zone control. Any or all of the 3 zones can run in any combination and will operate on the temperature settings entered under “HEAT SETTINGS”. 7.