Rinnai RH180 Installation Manual download pdf (Page 21)

RH180 Manual 21

Installaon of Plumbing

A manual 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

 Do not introduce toxic chemicals such as those

used for boiler water treatment to the potable

water used for space heang.

MUST DO

 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 on the water heater is

clean and installed.

Piping Requirements

Temperature-Pressure Relief Valve

Requirements

Install the Temperature-Pressure Relief (T&P) Valve

according to these instrucons.

This water heater is provided with a combinaon

temperature-pressure relief valve. For safe operaon

of the water heater, the relief valve(s) must not be

removed from its designated point of installaon or

plugged.

(Ce chaue-eau est équipé d’une soupape de

décharge. Pour assurer le fonconnement sécuritaire

du chaue-eau, ne pas rerer ni obturer cee

soupape de décharge.)

An approved Temperature-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

 Do not plug the T&P 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 T&P valve and the line.

 Do not place any other type valve or shut o

device between the relief valve and the water

heater.

MUST DO

 The T&P 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 T&P valve must be rated up to 150 psi and to

at least the maximum BTU/hr of the appliance.

 The discharge from the T&P 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 Temperature-Pressure Relief Valve must be

manually operated once a year to check for correct

operaon.

INFORMATION

 If a T&P 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.

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Rinnai RH180 Installation Manual Page 21

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