Rinnai Enviroflo User Manual

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About your Enviroo hot water heat pump
How it works
The operating principle of an electric heat pump is very similar to a refrigerator, but in reverse. A
heat pump operates by transferring heat from the ambient outside air into the water. Electricity is
used to operate the system, but not to directly heat the water. Because of this energy consumption
is signicantly reduced when compared to an electric element hot water system. The warmer the
climate in which the heat pump is installed, the more e󰀩cient the heat pump system will be at
heating water.
The heat pump includes a highly e󰀩cient micro-channel heat exchanger wrapped around the inner
cylinder for thermal conductivity. A temperature sensor in the cylinder is used to control the heat
pump operation to achieve a suitable cylinder temperature.
During the occasional times when the ambient weather conditions are not suitable for the heat
pump to operate, the electric element will provide heating to ensure a continued supply of hot
water.
Modes of operation
Mode
number
Mode Controller
display
Default
water set
temp.
Setting
range
Explanation
01 Standard
St:AN
60 °C 15~60 °C Factory preset mode, only the heat pump
operates. Restart temp. di󰀨erence
1
is 10 °C.
02 Economy
E:CO
55 °C 15~60 °C Only the heat pump operates. Restart temp.
di󰀨erence
1
is 10 °C.
03 Hybrid
HY:b
65 °C 15~70 °C Heat pump runs until the water temperature
reaches 60 °C. When this temperature is reached
the heat pump stops running. The electric
heating element will then continue heating the
water until it reaches the set temperature (if set
higher than 60 °C). In this mode the default water
temperature setting is 65 °C, and the restart
temperature di󰀨erence
1
is 10 °C.
04 Electric
E:LE
65 °C 15~70 °C Heating element mode, only the electric
heating element will work to heat the water.
Restart temperature di󰀨erence
1
is 10 °C.
When the heat pump turns on, the control system initiates and will check the unit’s operating
parameters. The controller will do a check on all the sensors and pressure switches. If conditions
are suitable (i.e. all reading within the operating conditions of the unit), and there is enough energy
available in the surrounding air, the fan and compressor will turn on. If not enough energy is
detected in the ambient air then the controller calls for the booster heating element to run.
There will be a delay from the time the heat pump is switched on before the fan and compressor
begin operating.
The unit is self regulating so there are no internal adjustments that need to be made. When the
unit is operated for the rst time, it runs through an initial heat up cycle, depending on ambient
conditions, this could take several hours.
1
Restart temperature di󰀨erence: The system will initiate a reheating cycle when the water temperature drops 10 °C below the set
temperature.

Rinnai Enviroflo Specifications

General

Brand	Rinnai
Model	Enviroflo
Refrigerant	R134a or R290 (model dependent)
Installation	Indoor
Cooling Capacity	Not applicable (primarily for water heating)
Energy Efficiency Ratio (EER)	Not applicable
Refrigerant Type	R134a or R290 (model dependent)