Start Up - Smith XWH 150 Instruction Manual

CHLORINE CONCENTRATION LESS THAN 200 PPM
1. Do not fill the water heater or operate with water containing
chlorine in excess of 200 ppm.
2. Filling with chlorinated fresh water should be acceptable
since drinking water chlorine levels are much lower.
3. Do not use the water heater to directly heat swimming pool
or spa water.
4. At initial fill and during water heater startup and testing, check
system thoroughly for any leaks. Repair all leaks before
proceeding further.
CHECK FOR GAS LEAKS
Before starting the water heater, and during initial operation,
smell near the floor and around the water heater for gas odorant
or any unusual odor. Remove the top access panel and smell
the interior of the water heater enclosure. Do not proceed with
startup if there is any indication of a gas leak. Use an approved
leak detection solution. Repair any leaks at once.
DO NOT adjust gas valve outlet pressure. The gas valve is
factory set for the correct outlet pressure. This setting is suitable
for natural gas and propane, requiring no field adjustment.
Attempting to alter the gas valve outlet pressure could result in
damage to the valve, causing potential severe personal injury,
death, or substantial property damage.
Figure 74. Condensate Trap
Propane water heaters only – Your propane supplier mixes an
odorant with the propane to make its presence detectable. In
some instances, the odorant can fade, and the gas may no longer
have an odor. Before startup (and periodically thereafter), have
the propane supplier verify the correct odorant level in the gas.
INSPECT/FILL CONDENSATE SYSTEM
Inspect/check condensate lines and fittings
1. Inspect the condensate drain line, condensate PVC fittings
and condensate trap.
Fill condensate trap with water
1. Remove the PVC cap retaining screw from the PVC cap
(Figure 74).
2. Remove the 2 inch PVC cap with the switch located at the
top of the trap (Figure 74).
3. Fill with fresh water until the water begins to pour out of the
drain.
4. Replace the cap. Press the cap onto the trap until the cap
makes contact with the drain.
5. Replace the retaining screw.

START UP

The condensate trap (Figure 74) must be filled with water during
all times of water heater operation to avoid flue gas emission
from the condensate drain line. Failure to fill the trap could result
in severe personal injury or death.
FINAL CHECKS BEFORE STARTING THE WATER HEATER
• Read the XP Water Heater Service Handbook to familiarize
with Control Module operation. Read this manual, Pages 52
and 53 for proper steps to start the water heater.
• Verify the water heater and system are full of water and all
system components are correctly set for operation.
• Verify the preparation procedures of Pages 50 and 51 have
been completed.
• Fill the vent condensate trap with water (removing the
retaining screw in order to remove the 2 inch PVC cap with
the switch located at the top of the trap). Replace the cap.
Press the cap onto the trap until the cap makes contact with
the drain. Replace the retaining screw.
• Verify electrical connections are correct and securely
attached.
• Inspect vent piping and air piping for signs of deterioration
from corrosion, physical damage or sagging. Verify air
piping and vent piping are intact and correctly installed per
this manual.
START THE WATER HEATER
Read and follow the Operating instructions on Pages 52 and 53.
IF WATER HEATER DOES NOT START CORRECTLY
1. Check for loose connections, blown fuse or service switch
off?
2. Is water heater water temperature above 200°F?
3. Is tank thermostat or tank Setpoint set below room
temperature?
4. Is gas turned on at meter or water heater?
5. Is incoming gas pressure less than 4 inches w.c.?
If none of the above corrects the problem, refer to the
Troubleshooting section of the XP Water Heater Service
Handbook.
CHECK SYSTEM AND WATER HEATER
Check water piping
1. Check system piping for leaks. If found, shut down the water
heater and repair immediately. (See WARNINGS on pages
53 and 54 (startup) regarding failure to repair leaks.)
2. Check Delta T. on Page 37 for more information.
3. Vent any remaining air from the system using manual vents.
Air in the system will interfere with circulation and cause
heat distribution problems and noise.
Check gas piping
1. Check around the water heater for gas odor following the
procedure on Page 42 of this manual (Connecting Gas
Supply Piping).
If you discover evidence of any gas leak, shut down the water
heater at once. Find the leak source with a bubble test and repair
immediately. Do not start the water heater again until corrected.
Failure to comply could result in severe personal injury, death, or
substantial property damage.
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