Installation Guide

WHL-648 Rev. 000 Rel. 002 Date 1.3.18
64
The condensate trap assembly MUST BE PROPERLY INSTALLED
according to these instructions when operating the appliance.
Operating the appliance without the condensate trap assembly
will cause ue gases to leak and result in serious personal injury
or death.
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.
other hose (D2) to the circulation pump inlet and place the free end in
the bucket.
Figure 57 - Cleaning the Inlet Filters
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 appliance 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 shuto valve V2.
c. Do not open shuto valve V1.
d. Allow water to ow through the appliance for 5 minutes.
e. Close shuto valve V2.
8. Disconnect hoses from lines. Properly dispose of used cleaning
solution.
9. Remove the DHW inlet lter from the appliance and clean out any
residues.
Cleaning the CH and DHW Inlet Filters (Draining the Appliance)
1. Place a bucket under the appliance to collect the residual water
inside the appliance.
2. Press the Power button on the control panel to turn o the electrical
power to the appliance. Then turn o the gas valve.
3. Valve o the appliance from the system. If the appliance cannot be
isolated from the system, turn o the main water valve.
4. Open the hot water faucets in the system to aid in draining the
system.
Water drained from the appliance could be scalding hot. Wait for the
appliance to cool before removing the CH or DHW inlet lters. Failure
to do so could result in property damage, personal injury, or death.
Figure 58 - Condensate Detail
5. Remove the DHW inlet lter. Then clean it with a toothbrush and
clean running water. See Figure 57.
press the Power button to turn the appliance on.
11. Reinsert the lter and ensure the lter cap is securely tightened.
12. Connect electrical power to the appliance.
Maintaining the Condensate System
6. Reinstall the DHW inlet lter.
7. Purge air from the DHW lines by opening a hot water faucet in the
system. When water ows freely, all air is purged.
8. Repeat the process on the CH inlet lter on the appliance.
9. Restore water service to the appliance by opening the isolation
valves, or turning on the main water valve.
10. Turn on the gas valve. Turn on electrical power to the appliance and
1. Ensure the appliance is powered o 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 appliance.
3. Remove the bottom cap from the condensate trap.
4. Flush trap with fresh water to remove debris from the trap.
NOTE: Ensure the oat moves freely within the trap. If the oat does
not move, DO NOT reinstall the trap.
Figure 56 - Flushing the DHW Loop