Univex 318258-000 ユーザーズマニュアル

11

Make sure the water heater has been properly    

1. 

installed. See “Installing Your Water Heater”  section.
Make sure the air filter is correctly seated, as it may 

2. 

shift during shipping or installation. See “Repair Parts 
Illustration” section.
Completely fill the tank with water (See “Water Piping” 

3. 

section). 
After the water heater tank is completely filled with water, 

4. 

connect electrical power to the water heater.
Read the “Water Temperature Regulation” section of this 

5. 

manual. 

If you do not fully understand these instruction, 

contact a qualifi ed person.

 

Press the power button (See Figure 10) to turn the water 

6. 

heater on and allow it to run a system diagnostic. This 
typically takes eight minutes. Once complete, proceed to 
the next step. 
NOTE:

 If the system diagnostic yields any codes, 

reference the Diagnostic Code section in this manual.
Adjust the thermostat to the desired temperature

7. 

setting as described under “Adjusting the User Interface 
Module/Operational Modes” section.

 Do not attempt to operate this water heater 

if the unit has been submerged, subjected to fl ooding, or 
surrounding insulation has been exposed to water in any 
way.  
Do not attempt to repair a unit subjected to fl ood conditions. 
Water heaters subjected to fl ood conditions or any time the 
unit has been submerged in water require replacement of 
the entire water heater.

This water heater is designed to automatically shut-off in the 
event that the water temperature exceeds 190°F or 87.8°C. 
A temperature limit switch or ECO (Energy Cut Off) is used 
to shut off the power to the system if the water temperature 
exceeds 190°F or 87.8°C (See “Water Temperature 
Regulation” section). To reset the ECO disconnect power at 
the circuit breaker/fuse box then remove the upper access 
panel. Reset the ECO by fi rmly pushing in the red reset 
button located on the ECO block. If the ECO continues 
to shut-off the water heater contact a qualifi ed person for 
service.

The water heater is adjusted to a temperature setting of 

no higher than 120°F when it is shipped from the factory. 

Water temperature can be regulated by adjusting the User 

Interface Module to the preferred setting as shown in 

“Adjusting the User Interface Module/Operational Mode” 

The preferred starting point is 120°F. There is a hot water 

scald potential if the temperature set point is set too high. 

Adjusting the set point above 120°F on the 

User Interface Module will increase the risk of scald injury in 
the times shown below.  

Table 1

Water 

Temperature °F

Time for 1st 

Degree Burn 

(Less Severe Burns)

Time for 

Permanent Burns 

2nd & 3rd Degree 

(Most Severe Burns)

110

116

116

122

131

140

149

154

(normal shower temp.)

(pain threshold)

35 minutes

1 minute

5 seconds

2 seconds

1 second

instantaneous

45 minutes

5 minutes

25 seconds

5 seconds

2 seconds

1 seconds

(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong, Sept. 15,1978)

 During low demand periods when hot water is not 

being used, a lower temperature set point will reduce energy 

losses and may satisfy your normal hot water needs. If hot 

water use is expected to be more than normal, a higher 

temperature set point may be required to meet the increased 

demand. 
When leaving your home for extended periods (vacations, 

etc.) set the water heater to Vacation Mode. See “Adjusting the 

User Interface Module/Operational Modes” section.  This will 

maintain the water at low temperatures with minimum energy 

losses and prevent the tank from freezing during cold weather. 
NOTE:

 When returning from an extended stay remember to 

set the water heater back to the desired Operational Mode.