Use and Care Manual
60
▪ H. CONDENSATE REMOVAL
▪ I. FINAL CHECKS BEFORE STARTING APPLIANCE
▪ J. ADJUSTING GAS PRESSURE AT THE APPLIANCE
1. This is a high efciency condensing appliance. Therefore, the appliance has a condensate drain. Condensate uid is nothing more than water
derived from combustion products, similar to that produced by an automobile
when it is initially started.
Condensate is slightly acidic (typically with a pH of 3 to 5) and must be piped
with the correct materials. Never pipe the condensate using steel, copper,
brass or other materials that will be subject to corrosion. Plastic PVC or CPVC
pipe are the only approved materials.
A condensate neutralizer, if required by local authorities, may be purchased
from aftermarket
2. It is very important that the minimum ½" condensate line is sloped downward
away from the appliance to a suitable inside drain. If the condensate outlet
on the appliance is lower than the drain, you must use a condensate removal
pump, available from aftermarket. This pump is equipped with two leads that
can be connected to an alarm or another type of warning device to alert the
user of a condensate overow, which, if not corrected, could cause property
damage.
3. If a long horizontal run is used, it may be necessary to create a vent in the
horizontal run to prevent a vacuum lock in the condensate line.
4. Do not expose the condensate to freezing temperatures.
5. It is very important you support the condensate line to ensure proper
drainage.
1. Verify the appliance and system are full of water and all system components are correctly set for operation.
2. Fill the condensate trap with water.
3. Verify electrical connections are correct and securely attached.
4. Inspect exhaust vent and intake piping for signs of deterioration from corrosion, physical damage, or sagging. Verify exhaust vent and intake
piping are intact and correctly installed per Venting Section (this manual) and local codes.
NOTE: Refer to Figure 39 when adjusting gas pressure. Loosen the screw before checking the gas inlet pressure.
1. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of the system
at test pressures greater than ½ psi (3.5 kPa).
2. The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the
gas supply piping system at test pressures equal to or less than ½ psi (3.5 kPa).
ADJUSTING GAS PRESSURE AT THE APPLIANCE
1. Open the gas line and water valves.
2. Use a Phillips Head screwdriver to remove the appliance top cover. Remove the front cover.
3. Loosen the gas inlet pressure tap screw three turns with a screwdriver. Connect the manometer to the inlet gas pressure port. See Figure 39.
4. Turn on power to the appliance and open a hot water faucet.
5. The minimum and maximum inlet gas line pressures must meet the requirements shown in Table 25.
Figure 39 – Gas Valve Detail
NOTICE
Do not re (operate) the appliance until all connections have been completed and the heat exchanger is lled with water. Doing so will damage
the appliance and void the warranty.