Rinnai RUR98e (REU-KBP3237WD-US) Installation Manual download pdf (Page 38)

38 KBP Series Manual

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A manual water control valve must be placed in the

water inlet connecon to the 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 disconnecon of the unit.



 Do not introduce toxic chemicals such as those

used for boiler water treatment to the potable

water.



 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 water heater.

 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

heang appliance.

 Ensure that the water lter(s) on the water heater

is clean and installed.

Piping Requirements

Pressure Relief Valve Requirements

Install the pressure relief valve according to these

instrucons.

An approved pressure relief valve is required by the

American Naonal Standard (ANSI Z21.10.3) for all

water heang systems and shall be accessible for

servicing.



 Do not plug the relief valve and do not install any

reducing ngs or other restricons in the relief

line. The relief line should allow for complete

drainage of the valve and the line.

 Do not place any other type valve or shuto device

between the relief valve and the water heater.



 The relief valve must comply with the standard for

Relief Valves and Automac Gas Shuto 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 per

local codes.

 The pressure relief valve must be manually

operated once a year to check for correct

operaon.

 The relief valve should be added to the hot water

outlet line and near the hot water outlet according

to the manufacturer’s instrucons. DO NOT place

any other type valve or shut o device between

the relief valve and the water heater.



 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

situaon. Do not plug the relief valve.

 The American Naonal Standard (ANSI Z21.10.3)

does not require a combinaon temperature and

pressure relief valve for this appliance. However,

local codes may require a combinaon

temperature and pressure relief valve.

Isolaon Valves

Isolaon valves are included with this water heater.

Rinnai strongly recommends the installaon of

isolaon valves on the cold and hot water lines

because they provide the ability to isolate the water

heater from the structure’s plumbing and allow quick

access to ush the heat exchanger. Flushing the heat

exchanger regularly is required as part of the proper

maintenance for this water heater.

Water discharged from the pressure relief valve could

cause severe burns instantly or death from scalds.

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