49 The front panel temperature control allows the end user to set the hot water supply temperature and will
display certain diagnostic codes of the water heater if there is a malfunction. All models have the option
of up to four controllers that can be used to conveniently control water temperatures for bath and shower
fixtures.
The main control is integrally mounted to project through the front panel of the water heater. The
adjustment range is 98-120F. Additional remote controls can be purchased, p/n 239-48788-00, and
these have the same available temperature range as the main control. If an optional commercial control,
p/n 239-48789-00, is purchased, the allowable temperature can be up to 185ºF. If a commercial control is
used, this reduces the warranty period of the water heater. Also, if a commercial control is used with a
water heater, all of the remaining controls connected to the water heater can achieve the maximum
temperature that the commercial control allows. See Table 13 for more details.
Table 13. Available Temperature Settings for TGHE Models.
Model Temperature Settings Available (°F)
TGHE-160I-N(X)
TGHE-199I-N(X) 98 100 102 104 106 108 110 115 120 125* 130* 135* 140* 150
** 160
** 185
**
Temp (ºC) 37 38 39 40 41 42 43 46 49 52 54 57 60 66 71 85
* Re-setting the Maximum Temperature
These units have a default maximum temperature of 120º F (49º C) and an option to increase the maximum
temperature to 140 ºF (60 ºC). Temperature settings from 125-140 ºF (52-60 ºC) are available by setting dip switch 6
to ON in the SW1 bank of 8 dip switches.
**239-48789-00, Commercial Control
These settings require the 239-48789-00 controller. When the 239-48789-00 controller is connected, these higher
temperatures are available on all controller models in the system. Use of a 239-48789-00 controller in a residential
dwelling will reduce the warranty coverage to that of a commercial warranty application.
Hotter water increases the risk of scald injury. Scalding may occur within 5 seconds at a
temperature setting of 140F (60C). To protect against hot water injury, install a mixing valve in the
water system. This valve will reduce point of discharge temperature by mixing cold and hot water in
branch water lines. A licensed plumbing professional or local plumbing authority should be
consulted.
This water heater, when set at a lower temperature setting is not capable of producing hot water of
sufficient temperature for sanitizing purposes. Always check water temperature by hand before
entering the shower or bath. The temperature may have been changed. Test the temperature of
the water with your hand or elbow before placing a child in the bath or shower. Do not leave a child
or an infirm person in the bath unsupervised.