Giant Factories ANSI Z21.10.3 Owner's Manual page 43

OPERATING INSTRUCTIONS
Temperatures lower than 98°F (37°C) can be obtained at the tap by
mixing with cold water. To change the temperature scale from Cel-
CAUTION
sius to Fahrenheit or vice versa, press and hold the On/Off button
for five (5) seconds while the water heater is OFF.
WARNING
DO NOT adjust the other switches unless specifically instructed
DANGER
to do so.
These temperatures are suggestions only:
AVERTISSEMENT
• Kitchen: 120°F (49°C)
• Shower: 98 - 110°F (37 - 43°C)
ATTENTION
• Bath Fill: 102 - 110°F (39 - 43°C)
Alternate Temperature Settings
A different range of temperature settings is available by setting
switches # 2 and # 3 of the SW2 dip switch (white) to ON. The
CAUTION
Table 28 shows the settings available with the MC-91-2 and MCC-
91-2 controller.
WARNING
MC-91-1, MCC-91-1, MC-100V-1, and BC-100V-1 controllers are
DANGER
not compatible with Alternate Temperature Settings. Alternate
Temperature Settings are for commercial applications only.
DO NOT use the MC-91-1, MCC-91-1, MC-100V-1, or BC-100V-1
AVERTISSEMENT
controllers when dip switches # 2 and # 3 (white) are in the ON
position.
ATTENTION
Temperature Options without Temperature Controller
The default temperature setting for this appliance installed without
a temperature controller is 120°F (49°C). If desired, the tempera-
ture setting can be changed to 140°F (60°C) by adjustment of a
switch.
In the SW1 tan switches, set switch # 5 to ON to obtain 140°F
(60°C) water temperature setting. Set switch # 5 to OFF (default)
to obtain 120°F (49°C) water temperature setting. If a temperature
controller is installed, then switch # 5 has no effect on temperature
settings.
Table 27
( 98 100
Fahrenheit F)
o
(
Celsius C) 37 38
o
* Temperature settings from 125-140°F (52-60°C) are available by setting switch # 6 to ON in the SW1 tan switches. These models have a default maximum temperature of
120°F (49°C) and an option (switch # 6) to increase the maximum temperature to 140°F (60°C).
** These settings require the MCC-91-2 controller. When the MCC-91-2 controller is connected, these higher temperatures are available on all controller models in the system.
Use of an MCC-91-2 controller in a residential dwelling will reduce the warranty coverage to that of a commercial warranty application.
Table 28
Fahrenheit (
F)
o
Celsius ( C)
o
Temperature Settings Available
102 104 106 108
39 40 41 42
Alternate Temperature Settings Available
110 115 120 125 130
43 46 49 52 54
MC-91-2
Setting Controller to Mute
On the MC-91-2 to eliminate beeps when keys are pressed or to
turn the beeps back on, press and hold both the UP and DOWN
buttons until a beep is heard (approximately five (5) seconds).
Locking the Controller
The MC-91-2 controller can be locked by pressing the Priority
button and the UP button together for five (5) seconds. A beep
will sound confirming that the controller is locked. The display will
alternately show "LOC", the temperature setting, and a diagnostic
code, if one has been activated. All of the controllers in the system
are also locked.
To unlock the controller, press the Priority button and the UP but-
ton together for five (5) seconds.
Diagnostic Codes
This water heater is designed to display diagnostic codes. If there
is a potential operation concern, refer to the code and remedy on
the next page.
To Display Diagnostic Information
To display the most recent diagnostic information code, press and
hold the "On/Off" button for two (2) seconds on the MC-91-2 con-
troller. While holding the "On/Off" button, press the UP button.
The last nine (9) diagnostic codes will flash one after the other. To
exit this mode, press the "On/Off" and UP button as before.
To enter or exit the maintenance monitor information mode, press
and hold the DOWN button for two (2) seconds and without releas-
ing it, press the ON/OFF button.
To obtain the water flow rate: press the UP or DOWN buttons until
"01" displays. The water flow rate will then appear. For example,
"58" means 5.8 gal/min.
To obtain the outgoing water temperature, press the UP or DOWN
buttons until "02" displays. The temperature will appear in degrees
Fahrenheit.
Table 29
No.
01
02 Outgoing water temperature
110 115 120 125* 130*
43 46 49 52
135 140 145 150
57 60 63 66
MCC-91-2
43
Data
Water flow rate
Degrees Fahrenheit
135* 140* 150**
54 57 60 66
155 160 165 170
68 71 74 77
Unit
0.1 gal/min
160** 185**
71 85
175 180 185
79 82 85