Final Checks Before Starting The Water Heater - Lochinvar Shield SWR125 Installation & Service Manual

9
Start-up
Final checks before starting the water
heater
q Read this manual to familiarize yourself with electronic
control module operation. Read pages 53 and 54 for proper
steps to start the water heater.
q Verify the water heater and system are full of water and all
system components are correctly set for operation.
q Verify the preparation procedures of Section 9, pages 50 -
52 have been completed.
q 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.
q Verify electrical connections are correct and securely
attached.
q 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.
Verify pump settings
Models 125 - 200 are equipped with a 3-speed circulator.
Verify the correct pump speed setting using Table 9B (see
below). Models 285 - 500 are equipped with a single speed
circulator and cannot be adjusted.
Table 9B Pump Settings
Model
125 - 150
200
Check system and water heater
q Check water piping
1. Check system piping for leaks. If found, shut down the
water heater and repair immediately.
2. Check Delta T. Ensure Delta T is less than 85°F, if not,
reference Section 12 - Troubleshooting.
3. Vent any remaining air from the system using manual
vents. Air in the system will interfere with circulation and
cause hot water distribution problems and noise.
(continued)
Pump Setting
HI
MED
Start the water heater
1. Read and follow the Operating instructions in FIG.'s 9-2
and 9-3, pages 53 and 54.
If water heater does not start correctly
1. Check for loose connections, blown fuse or service switch
off.
2. Is external limit control (if used) open? Is water temperature
above 200°F?
3. Is tank set point set below tank temperature?
4. Is gas turned on at meter and 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 this manual.
Check system and water heater
q Check water piping
1. Check system piping for leaks. If found, shut down the
water heater and repair immediately.
2. Check Delta T. Ensure Delta T is less than 30°F, if not,
reference Section 12 - Troubleshooting.
3. Vent any remaining air from the system using manual vents.
Air in the system will interfere with circulation and cause
hot water distribution problems and noise.
q Check vent piping and air piping
1. Check for gastight seal at every connection, seam of air
piping, and vent piping.
Venting system must be sealed gastight
⚠ WARNING
to prevent flue gas spillage and carbon
monoxide emissions, which will result in
severe personal injury or death.
q 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,
⚠ WARNING
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.
Installation & Service Manual
51