43
GI-IM048En-1013
PART 8 – START-UP PROCEDURE
FOR YOUR OWN SAFETY READ BEFORE OPERATING
1. This water heater does not have pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light
the burner by hand.
2. BEFORE OPERATING: smell all around the water heater area for gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any water heater.
Do not touch any electric switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor's phone. Follow the gas suppliers' instructions.
If you cannot reach your gas supplier, call the fire department.
Turn off gas shutoff valve (located outside of the water heater) so that the handle is crosswise to the gas pipe. If the handle will
not turn by hand, don't try to force or repair it, call a qualified service technician. Force or attempted repair may result in a fire
or explosion.
3. Do not use this water heater if any part has been under water. Immediately call a qualified service technician to inspect the water
heater and to replace any part of the control system and any gas control that has been damaged.
4. The water heater shall be installed so the gas ignition system components are protected from water (dripping, spraying, rain, etc.)
during water heater operation and service (circulator replacement, condensate trap, control replacement, etc.)
Failure to follow these instructions could result in property damage, serious personal injury, or death.
A. OPERATING INSTRUCTIONS
If you smell gas,
STOP
. Follow listed safety instructions above. If you do not smell gas, follow the next steps.
1. Turn on all electric power to water heater. Make sure tank is full with cold water and purge all piping. To assure adequate purging,
open all hot water faucets.
Ensure the water heater is full of water before firing the burner. Failure to do so will damage the heater. Such damage IS NOT covered
by warranty, and could result in property damage, serious personal injury, or death.
2. Adjust the temperature set point of the heater to the desired level. The factory default setting is 119
o
F (48
o
C). If changes are
necessary, follow “Overall Water Heater and Control Operation” in this section.
3. If the water heater fails to start, refer to the Troubleshooting section in the back of this manual.
B. OVERALL WATER HEATER AND CONTROL OPERATION
In order to adjust the temperature of stored water, press and hold
{S3}
for two (2) seconds. The first item is
DU
: Water Temperature Set
Point – factory set at 119°F (48
o
C). Adjust down by pressing
{S1}
to a temperature as low as 95°F (35
o
C). Adjust up as high as 160°F
(71
o
C) by pressing the
{S2}
. Press
{S3}
again to display
DH
, the differential which is factory set at 7°F (-14
o
C) and adjustable down to
1°F (-17
o
C) by pressing
{S1}
and up to 18°F (-8
o
C) by pressing
{S2}
. Note: Due to the highly advanced control on this water heater,
which compensates for varying inlet water temperature, the actual differential temperature may vary slightly from your setting. Press
{S3}
again to display the factory default temperature measurement in Fahrenheit. Change the default to Celsius by pressing
{S1}
. When
finished, press
{S3}
one final time to place unit back into operation. The control automatically re-starts if no key is pressed for two (2)
minutes.
C. STATUS MENU
Installers are also able to check the current status of the heater parameters by pressing
{S4}
for three (3) seconds. Once activated, the
display will show
|d1|
alternating value of the actual upper supply tank temperature. Actual values are displayed for each function. To
view the next value, simply press
{S/4}
to go to the next displayed value. Listed below are the values which can be displayed. These
values cannot be changed. To exit this menu, press
{S3}
to resume normal operation.
Summary of Contents for UGC120S-100
Page 36: ...36 GI IM048En 1013 Figure 18 LP LP ...
Page 39: ...39 GI IM048En 1013 D INTERNAL WIRING DIAGRAM Figure 21 Wiring Diagram LP ...
Page 40: ...40 GI IM048En 1013 Figure 22 LP 179 L LP ...
Page 49: ...49 GI IM048En 1013 Figure 26 LP 179 J LP ...
Page 50: ...50 GI IM048En 1013 Figure 27 LP 179 H LP ...
