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Install a plinth under the heat pump
where it is subjected to wet conditions
Allow 200m3 of free space surrounding the unit. This provides clear ambient airflow assisting the product's
performance. Ensure the clearance requirements specified in the section '' on page 12 are complied with. The
area must also be clear of debris such as leaves and tree branches.
CONNECT THE PTR VALVE
Connect the PTR valve to the uppermost fitting of the storage cylinder. See the diagram on page the section
'Dimensions' on page 12.
The PTR pressure rating must be suited for the cylinder and adequate for the thermal loading applied to the
storage cylinder, as specified in the table on 11.
The supplied PTR valve input rating is 10.0 kW. The PTR valve rating MUST EXCEED the total input from the heat
pump. For example, the maximum output from the EHPA250VM is 4.29 kW (see the table on page 11). This is
less than 10.0 kW, hence the supplied PTR valve is of sufficient capacity.
Use Teflon thread tape on the valve, never use hemp or other sealing materials. Ensure the tape does not protrude
past the end of the thread, which could result in it hanging over the end of the thread and blocking the water
passage through the valve. The PTR valve must be installed on the connection marked 'hot water outlet' near the
top of the cylinder.
Leave the valve outlet pointing down. Tighten the valve using the spanner flats - never use the valve body
Connect the supplied PTR valve into the top socket marked "Relief Valve" and discharge according to plumbing
regulations.
PTR Valves for the unit are rated at 1000kpa.The drain line from this valve must run in a continuously downward
direction with the discharge end left permanently open to atmosphere.
PLUMBING CONNECTIONS
Refer to the diagram on page 12 for detailed information on position of plumbing.
An approved isolating valve, non return valve, line strainer, and union must be fitted between the supply main and
the RP ¾ socket in the water heater.
All fittings must be approved by the relevant installation Authority.
An ECV must be fitted in Western Australia and South Australia to the cold water supply to the storage cylinder to
comply with local regulations. An ECV is recommended in all other geographical areas where the water supply has
a tendency to cause scaling. This will reduce hot water discharge from the pressure and temperature relief (PTR)
valve which minimises wear on this valve.
This water heater is designed for direct connection to water supply pressures of no greater than those specified on
page 11. Where the mains pressure can exceed or fluctuate beyond this, a pressure limiting device (complying
with AS1357) must be fitted.
Rinnai
Optimum installation location is on the
warmest side of house.
17
INSTALLATION
EHPA Heat Pump OIM
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