Westinghouse WBRC 140 Series Installation, Start-Up, Maintenance, Parts, Warranty page 64

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pump outlet and the cold water inlet line to valve V4. Connect the
other hose (D2) to the circulation pump inlet and place the free end
in the bucket.
Figure 57 - Flushing the DHW Loop
4. Pour tankless cleaning solution into the bucket. Use an FDA
approved cleaner for potable systems on the heat exchanger. Place the
drain hose (D1) and hose D2 to the pump inlet in the cleaning solution.
5. Open service valves (V3 and V4) on the hot water outlet and cold
water inlet lines.
6. Turn on the circulation pump. Operate the pump and allow the
cleaning solution to circulate through the boiler for at least 1 hour at a
rate of 4 gallons per minute.
7. Rinse the cleaning solution from the heat exchanger as follows:
a. Remove the free end of drain hose D1 from the bucket.
b. Close service valve V4 and open shutoff valve V2.
c. Do not open shutoff valve V1.
d. Allow water to flow through the boiler for 5 minutes.
e. Close shutoff valve V2.
8. Disconnect hoses from lines. Properly dispose of used cleaning
solution.
9. Remove the DHW inlet filter from the boiler and clean out any
residues.
Cleaning the CH and DHW Inlet Filters (Draining the Boiler)
1. Place a bucket under the boiler to collect the residual water inside
the boiler.
2. Press the Power button on the control panel to turn off the electrical
power to the boiler. Then turn off the gas valve.
3. Valve off the boiler from the system. If the boiler cannot be isolated
from the system, turn off the main water valve.
4. Open the hot water faucets in the system to aid in draining the
system.
WARNING
!
Water drained from the boiler could be scalding hot. Wait for the
boiler to cool before removing the CH or DHW inlet filters. Failure
to do so could result in property damage, personal injury, or death.
5. Remove the DHW inlet filter. Then clean it with a toothbrush and
clean running water. See Figure 58.
Figure 58 - Cleaning the Inlet Filters
6. Reinstall the DHW inlet filter.
7. Purge air from the DHW lines by opening a hot water faucet in the
system. When water flows freely, all air is purged.
8. Repeat the process on the CH inlet filter on the boiler.
9. Restore water service to the boiler by opening the isolation valves, or
turning on the main water valve.
whl-648 Rev. 001 Rel. 003 Date 10.8.19
10. Turn on the gas valve. Turn on electrical power to the boiler and
press the Power button to turn the boiler on.
11. Reinsert the filter and ensure the filter cap is securely tightened.
12. Connect electrical power to the boiler.
DANGER
!
The condensate trap assembly MUST BE PROPERLY INSTALLED
according to these instructions when operating the boiler.
Operating the boiler without the condensate trap assembly will
cause flue gases to leak and result in serious personal injury or
death.
WARNING
!
When servicing is complete, make sure the condensate collector
cap is replaced securely. Failure to do so will cause venting issues
that will result in serious injury or death.
Maintaining the Condensate System
1. Ensure the boiler is powered off and has had time to cool.
2. Remove the hose clamp attaching the condensate trap to the
condensate hose from the heat exchanger. Remove the clear plastic
hose from the hose barb. Remove the condensate hose clamp
to detach the condensate trap from the drain tube. Remove the
condensate trap from the boiler.
3. Remove the bottom cap from the condensate trap.
4. Flush trap with fresh water to remove debris from the trap.
NOTE: Ensure the float moves freely within the trap. If the float does
not move, DO NOT reinstall the trap.
Condensate
Trap Top
EPDM
Gasket
Float
Ball
Condensate
Trap Body
Condensate
Trap O-Ring
Condensate
Trap Bottom
Figure 59 - Condensate Detail
5. When the condensate trap is sufficiently clean, reinstall the
bottom cap on the trap.
NOTE: Ensure all parts shown in Figure 59, Condensate Detail, are
installed with the condensate trap. If any parts are missing DO NOT
reinstall the trap. Replace the entire assembly.
WARNING
!
Do not install the condensate assembly if a component is lost or
missing. Replace the entire assembly. Failure to follow this warning
could result in property damage, serious personal injury, or death.
Hose
Adapter
Clip
Hose
Adapter
Hose Adapter
O-Ring