Rinnai R94LSe User Manual

 

 

VA Series Outdoor LS Manual 

21 

  Water 

The freeze protection features include electrical heating 
elements and intermittent firing of the burner.  Freeze 
protection may be disabled if electricity or gas is not 
supplied, or if there is an error preventing the water 
heater from functioning.  Loss of freeze protection may 
result in water damage from a burst heat exchanger or 
water lines. 

The installation of auto drain down solenoid valves is 
optional.  However, Rinnai strongly recommends that 
these valves be installed to prevent damage from 
freezing in case the normal freeze protection should 
become disabled.  Any product damage due to freezing 
will not be covered by the warranty. 

In addition, the solenoid valves should be connected 
electrically to a sub-PC board that attaches to the PC 
board in the unit.  This allows the solenoid valves to 
operate if the water heater is disabled due to an error 
code.   

The solenoid valves and sub-PC board are available for 
purchase separately. 

 

 

A manual water control valve must be placed in the 
water inlet connection to the Rinnai water heater 
before it is connected to the water line.  Unions may 
be used on both the hot and cold water lines for 
future servicing and disconnection of the unit. 

The piping (including soldering materials) and 
components connected to this appliance must be 
approved for use in potable water systems. 

Purge the water line to remove all debris and air.  
Debris will damage the Rinnai water heater. 

Toxic chemicals such as those used for boiler water 
treatment are not to be introduced to the potable 
water used for space heating. 

If the appliance will be used as a potable water 
source, it must not be connected to a system that 
was previously used with a nonpotable water heating 
appliance. 

Ensure that the water filter on the Rinnai water 
heater is clean and installed. 

An approved pressure relief valve is required by the 
American National Standard (ANSI Z21.10.3) / 
Canadian Standard (CSA 4.3) for all water heating 
systems. 

The relief valve must comply with the standard for 
Relief Valves and Automatic Gas Shutoff Devices for 
Hot Water Supply Systems ANSI Z21.22 and/or the 
standard Temperature, Pressure, Temperature and 
Pressure Relief Valves and Vacuum Relief Valves, 
CAN1-4.4.   

The relief valve must be rated up to 150 psi and to at 
least the maximum BTU/hr of the appliance. 

The discharge from the pressure relief valve should 
be piped to the ground or into a drain system to 
prevent exposure or possible burn hazards to 
humans or other plant or animal life.  Follow local 
codes.  Water discharged from the relief valve could 
cause severe burns instantly, scalds, or death. 

The pressure relief valve must be manually operated 
once a year to check for correct operation. 

The relief valve should be added to the hot water 
outlet line according to the manufacturer

,

s 

instructions.  DO NOT place any other type valve or 
shut off device between the relief valve and the water 
heater. 

Do not plug the relief valve and do not install any 
reducing fittings or other restrictions in the relief line.  
The relief line should allow for complete drainage of 
the valve and the line. 

If a relief valve discharges periodically, this may be 
due to thermal expansion in a closed water supply 
system.  Contact the water supplier or local plumbing 
inspector on how to correct this situation.  Do not 
plug the relief valve. 

Neither Rinnai nor the American National Standard 
(ANSI Z21.10.3) / Canadian Standard (CSA 4.3) 
requires a combination temperature and pressure 
relief valve for this appliance.  However local codes 
may require a combination temperature and pressure 
relief valve.