Rinnai RV53E Manuel D’Utilisation

 

 

RV53i & RV53e Operation and Installation Manual 

19 

The freeze protection features include electrical 
heating elements.  Freeze protection may be disabled 
if electricity 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 surge protector with terminals.  This 
allows the solenoid valves to operate if the water 
heater is disabled due to an error code.   

The solenoid valves and surge protector with terminals 
are available for purchase at Rinnai. 

The freeze protection features will not prevent the 
external piping from freezing.  Rinnai recommends 
heat tracing and insulating hot and cold water pipes 
connecting units.  Pipe cover enclosures may be 
packed with insulation for added freeze protection. 

With electrical power supplied, Rinnai water heaters 
will not freeze when the outside air temperature is as 
cold as –22ºF (-30ºC) for indoor models or is as cold 
as –4ºF (-20ºC) for outdoor models, when protected 
from direct wind exposure.  Because of the “wind-chill” 
effect, any wind or circulation of the air on the unit will 
reduce its ability to freeze protect. 

•  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 

for all water heating 

systems, and shall be accessible for servicing. 

•  The relief valve must comply with the standard for 

 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 and near the hot water outlet 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.