Toshiba HWT-1101F21MM3W-E Installation Manual Download Page 17

Page: 17 / 39

– 16 –

Hydro Unit

Installation Manual

Restricted Operation
• Maximum compressor frequency is limited.

System OFF

• System safety controls (e.g.freeze protection) will

remain active.

Normal Operation
• This is not a START signal, only a recommendation

to start.

System Forced ON
• The space heating set point temperature is

increased during this period. The temperature
increase can be adjusted using a new DN “DN [AC]”.
(0 ~ 10 K)

• ON/OFF delay of the Hydro Unit back up heater

changes from 10 min to 0.

DN [6CE] = 0: HP and back up heaters ON
DN [6CE] = 1: HP only operation
• The Hot water control changes to Hot water boost

control.

I/P7: TEMPO1 signal input
• DN [B6] = 1
• Non-voltage contacts
• When the TEMPO signal is input (the circuit is

closed), the boiler signal is output regardless the
outside temperature and devices are turned off
Heater.

1.Basic operation: heating operation using the boiler.
2.Switching to hot water supply: the water circuit is

switched to the hot water supply side as the unit
detect that TTW is less than 38°C.

3.Switching to heating: the water circuit is switched to

the heating side as the unit detect that TTW is

45°C or more, or 30 minutes has passed since
operation started. Heating operation continues at
least 30 minutes.

4.The LED on the PC board lights up when the input

signal is ON.

I/P7: TEMPO2 signal input
• DN [B6] = 2
• Non-voltage contacts
• When the TEMPO signal is input (the circuit is

closed), the boiler signal is output regardless the
outside temperature and devices are turned off
heater, inlet pump, heat pump.

1.Basic operation: heating operation using the boiler.
2.Switching to hot water supply: the water circuit is

switched to the hot water supply side as the unit
detect that TTW is less than 38°C.

3.Switching to heating: the water circuit is switched to

the heating side as the unit detect that TTW is 45°C
or more, or 30 minutes has passed since operation
started. Heating operation continues at least 30
minutes.

4.The LED on the PC board lights up when the input

signal is ON.

I/P7 & I/P8: Forcibly turn off heaters
• Non-voltage contacts
• DN [B6] = 3

I/P7: Forcibly turn off the backup heater
I/P8: Forcibly turn off the hot water tank heater
Open: Normal operation

Close: Forcibly turn off the heater

I/P7: Emergency Shutdown input
• DN [B6] = 0
• Non-voltage contacts

Open: Normal operation

Close: Emergency shutdown

CAUTION

• Be sure to prepare a non-voltage continuous contact

for each terminal.

• Supplementary Insulation must be added to user

touchable part of switches.

Electrical safety checks

The electrical safety checks must be completed before
turning on the electrical supplies to the Air to Water
heat pump system. The electrical safety checks should
be completed by a qualified electrician. All results
measured should comply with your local/national
electrical installation regulations.

Earth continuity test

On completion of the electrical installation a resistance
test should be completed on the earth conductor to
ensure continuity between all pieces of equipment on
the earth conductor.

Insulation resistance test

This test must be completed using a 500 V D.C.
insulation resistance tester. Insulation resistance tests
should be completed between each live terminal and
earth.

■

Second remote controller

(option)

Installation place

• Install the remote controller at a height of 1 to 1.5 m

from the floor so that the average temperature in the
room can be detected.

• Do not install the remote controller in a place

exposed to direct sunlight or direct outside air, such
as the side of a window.

• Do not install the second remote controller in a

location where the air flow around the remote
controller in restricted.

• Do not install the remote controller in a freezing box

or refrigerator, as the remote controller is not
waterproof.