Warranty
Table Of Contents
- Part 1 - General Safety Information
- Part 2 - Before You Start
- Part 3 - Prepare the Appliance Installation
- A. Locating the Appliance
- B. Leveling
- C. Clearances for Service Access
- D. Residential Garage and Closet Installations
- E. Exhaust Vent and Intake Pipe
- F. Carbon Monoxide Detectors
- G. Prevent Combustion Air Contamination
- H. Removing a Appliance from a Common Vent System
- I. Technical Specifications
- J. Wall-Mounting (Wall Mount Models Only)
- K. Flow Restrictor
- Part 4 - Water Piping
- Part 5 - Venting
- A. General
- B. Approved Materials for Exhaust Vent and Intake Pipe
- C. Additional Requirements for Installation in Canada
- D. Exhaust Vent and Intake Pipe Location
- E. Exhaust Vent and Intake Pipe Sizing
- F. Tightening Appliance Collar to Exhaust Vent and Intake Pipe
- G. Exhaust Vent and Intake Pipe Installation
- H. Applications
- Part 6 - Installing the Condensate Drain
- Part 7 - Connecting Electrical Service
- Part 8 - Gas Connections
- Part 9 - Controls
- Part 10 - Troubleshooting
- Part 11 - Start-Up
- Part 12 - Installation Checklist
- Part 13 - Maintenance
- Part 14 - Moving Adapters from Left to Right (Floor Models)
- Part 15 - Replacement Parts

18
whl-648 Rev. 000 Rel. 009 Date 1.4.19
This boiler is too heavy for one person to lift. It is highly recommended to install the boiler with two people. Use caution as to not drop
the boiler, which could damage the boiler and cause property damage and/or severe personal injury. Verify that the boiler is properly and
securely mounted before leaving unsupervised. Failure to comply with the above and properly mount the boiler could result in substantial
property damage, severe personal injury, or death.
This wall mounting system is not seismic rated and should not be applied as such. Failure to comply with the above and properly mount the
boiler could result in substantial property damage, severe personal injury, or death.
Positioning the Boiler on the Wall
1. Attach the wall bracket on the location where you want to install the boiler. Ensure it is level and on stud (16” centers) before proceeding.
2. Mark the four drill holes with a pencil or marker. Remove the wall bracket.
3. Drill four (4) holes using a 5/32 drill bit at the marked hole locations.
4. Mount the wall bracket to the wall with the four (4) included anchor bolts. Ensure the mounted bracket is level. See Figure 7A.
5. Align the boiler bracket grooves on the back of the boiler with the tongues on the wall bracket and hang the boiler on the bracket.
See Figure 7B.
Figure 6 - Wall-Mounting the Boiler
K. Flow Restrictor
A ow restrictor is installed on this boiler in the DHW inlet adapter to
avoid excessive ow at the faucets. See Flow Charts, this manual, for
more information.
If it is necessary to further increase ow to the system, replace the
factory installed white ow restrictor with the blue included with the
boiler by following the instructions below.
If the boiler is already fully installed, turn the gas, power, and
water o to the boiler and drain all water from the boiler BEFORE
proceeding. Failure to comply could result in substantial property
damage, severe personal injury, or death.
Figure 7 - A - Removing the DHW Inlet Filter, B - Removing the Flow
Restrictor
1. Locate the DHW inlet adapter on the bottom of the boiler.
2. Pull the two pins to release the DHW inlet lter. See Figure 7-A. The ow restrictor is attached to the top of the lter assembly.
3. Remove the installed white ow restrictor and replace it with the blue ow restrictor included with the boiler. See Figure 7-B.
4. Reinstall the DHW inlet lter.
5. Reinstall the two pins.