Toshiba A09-01P User Manual
FILE NO : A09-01P
Quick reference
AIR TO WATER HEAT PUMP
Quick Reference Guide - Page 2
Estia System
Estia Outdoor Unit
HWS-802H-E 8.0kW Inverter (use Hydro Unit: HWS-802XWH**-E)
HWS-1102H-E 11.2kW Inverter (use Hydro Unit: HWS-1402XWH**-E)
HWS-1402H-E 14.0kW Inverter (use Hydro Unit: HWS-1402XWH**-E)
Estia Hydro Unit
HWS-802XWHM3-E Plate Heat exchanger and 3kW Backup Heater
HWS-802XWHT6-E Plate Heat exchanger and 6kW Backup Heater
HWS-1402XWHM3-E Plate Heat exchanger and 3kW Backup Heater
HWS-1402XWHT6-E Plate Heat exchanger and 6kW Backup Heater
HWS-1402XWHT9-E Plate Heat exchanger and 9kW Backup Heater
Estia Hot Water Cylinder (EU)
HWS-1501CSHM3-E 150L Stainless Steel Tank (with EU Accessories)
HWS-2101CSHM3-E 210L Stainless Steel Tank (with EU Accessories)
HWS-3001CSHM3-E 300L Stainless Steel Tank (with EU Accessories)
Estia Hot Water Cylinder (UK)
HWS-1501CSHM3-UK 150L Stainless Steel Tank (with UK Accessories)
HWS-2101CSHM3-UK 210L Stainless Steel Tank (with UK Accessories)
HWS-3001CSHM3-UK 300L Stainless Steel Tank (with UK Accessories)
Note:
Under floor heating, Fan Coil units, Radiators, valves and Hot Water Piping are procured locally.
Outdoor unit
Hydro unit
Domestic Hot Water
Hot water
cylinder
Space Conditioning
Radiator
Fan coil unit
(Heating or Cooling)
Under floor heating
(Zone Control)
Quick Reference Guide - Page 3
Notes on System Design
• The input water temperature to the Hydro Unit must be 55°C or less.
Especially, be careful when there is an external heating source such as a boiler.
When hot water over 55°C returns, it may result in a failure of the unit or water leakage.
• The flow rate of the circulating water must meet the following range:-
11 and 14 kW 17.5 L/minute or more
8 kW 13 L/minute or more
If the flow rate becomes less than the minimum, the protective device is activated to stop operation.
Ensure the flow rate with a bypass valve, etc. when you use a flow rate valve for the Hydro Unit.
• Do not drive water by power other than the pump built in the Hydro Unit.
• The backup heater operates supplementary to exert a prescribed capacity when the heat pump
cannot exert its capacity at a low outside temperature.
• Install the Hydro Unit and water pipes in a place in which they do not freeze.
• Make the water circuit closed. Never use it as an open circuit.
• To prevent damage to the system during outdoor defrost the circulating water must be 20 litres
or more. If total water amount is not enough, the unit may not function fully due to protective
operation.
Options required for each function
Purpose
Space Heating - -
Space Heating &
Space Cooling
(All Rooms)
Space Heating &
Space Cooling
(partly heating only)
150L Hot water cylinder HWS-1501CSHM3-E
150L Hot water cylinder HWS-1501CSHM3-UK
Domestic Hot Water
2-zone control - -
Interlocking with
boiler
Interlocking with
booster heater
210L Hot water cylinder HWS-2101CSHM3-E
210L Hot water cylinder HWS-2101CSHM3-UK
300L Hot water cylinder HWS-3001CSHM3-E
300L Hot water cylinder HWS-3001CSHM3-UK
Output control board kit
Part name Model code Part name
(1)
Toshiba Supply Procure locally
- - Fan coil(s) only
- -
- - Electric heater
Radiator(s),
Fan coil(s),
Under floor heating
Fan coil(s) plus
Radiator(s)
or Under floor heating
Motorized 2-way
valve
Motorized 3-way
valve
Earth leakage breaker
Motorized mixing
valve
Circulator pump
Buffer tank
TBC-PCIN3E Boiler
Quick Reference Guide - Page 4
Installation Examples
Space Cooling and Space Heating with Domestic Hot Water
When both cooling and heating are used, install a 2-way valve (for cooling) to the pipe to the room
for heating only.
Quick Reference Guide - Page 5
Installation Examples (cont.)
2-Zone Space Heating with Domestic Hot Water
The following shows an example of the 2-zone temperature control.
A buffer tank and a water pump are required for the 2-zone temperature control. This example is
Heating only, if the Fan Coils are to be used for Cooling then a 2-Way valve must be fitted.
Hydro Unit – Exploded View
Quick Reference Guide - Page 6
1 : Expansion vessel
2 : Hi pressure switch (4.15 MPa)
3 : Temperature sensor (for Heat pump outlet -TWO)
4 : Pressure sensor
5 : Heat exchanger
6 : Flow switch (13.0 L/min 17.5 L/min)
7 : Temperature sensor (for refrigerant -TC)
8 : Temperature sensor (for water inlet -TWI)
9 : Drain nipple
10 : Water inlet connection
11 : Refrigerant liquid connection
12 : Air relief valve
13 : Pressure relief valve (0.3 MPa (3 bar))
14 : Thermal protector (auto)
15 : Temperature sensor (for water outlet THO)
16 : Thermal protector (Single operation)
17 : Water pump
18 : Backup heater (3 kW, 3 kW x 2, 3 kW x 3)
19 : Manometer
20 : Water outlet connection
21 : Refrigerant gas connection
Quick Reference Guide - Page 7
Refrigerant Piping
Refrigerant Pipe Lengths and Height
The length and height of the refrigeration pipe must be within the following values.
Minimum Pipe Length
HWS-802H-E : 5 m
HWS-1102H-E : 3 m
HWS-1402H-E : 3 m
Maximum Pipe Length and Height
H: Max. ±30 m (above or below)
L: Max. 30 m
Note
The maximum pipe length cannot be increased using additional
refrigerant.
Refrigeration and Water Cycle Diagrams
Hydro Unit
Refrigerant pipe
at gas side
(Outer ø15.88)
Refrigerant pipe
at liquid side
(Outer ø9.52)
Expansion vessel
Hi_P_Switch
P_Sensor
TC
Sensor
Water Heat exchanger
Thermal
Protector
TWO
Sensor
Air vent valve
Backup heater
Pressure
relief
valve
THO
Sensor
Flow_Switch
Pressure
Gauge
Pump
Water Out
(1 1/4")
TWI
Sensor
Water IN
(1 1/4")
Outdoor Unit
HWS-802H-E
Quick Reference Guide - Page 8
HWS-1102H-E, 1402H-E
Quick Reference Guide - Page 9
Water Piping
• Install water pipes according to the regulations of respective countries.
• Install water pipes in a freeze-free place.
• Make sure that water pipes have sufficient pressure resistance (The setting value of the pressure
relief valve is 0.3 MPa).
• Do not use zinc plated water pipes. When steel pipes are used, insulate both ends of the pipes.
Water Connections
• Install a strainer with 30 to 40 meshes (procure locally) at
the water inlet of the Hydro Unit.
• Install drain cocks (procure locally) for water charge and
discharge at the lower part of the Hydro Unit.
Water Piping Limitations
Design the water pipe length within the QH
characteristics of the pump (flow-rate and pump
head).
The maximum height difference for the water pipes i
7 metres.
Piping to hot water tank (option
Water supplied to the hot water cylinder is branched by a
motorized 3-way valve (procured locally).
Connect the hot water cylinder to port A (open when
energized) of the valve.
)
Piping to 2-zone operation (option)
To perform 2-zone temperature control circulate water using another pump (procured locally)
through a motorized mixing valve (procured locally) and a buffer tank (procured locally).
s
Quick Reference Guide - Page 10
Checking water volume and initial pressure of expansion vessel
The expansion vessel of the Hydro Unit has a capacity of 12 litres.
The initial pressure of the expansion vessel is 0.1 MPa (1 bar).
The suggested initial water charge is 0.2MPa (2 bar).
The pressure of the safety valve is 0.3 MPa (3 bar).
Verify whether the capacity of the expansion vessel is sufficient using the following expression. If
the volume is insufficient, install an appropriate external expansion vessel.
V Action
< 12 L Internal Expansion Vessel Size OK
> 12 L
Internal Expansion Vessel Size too small.
Install appropriate external expansion vessel
V: Necessary total vessel capacity (L)
Ɛ: Water expansion coefficient at average hot water temperature
Vs: Total water volume in the closed system (Do not include Hot Water Cylinder)
P1: System pressure at tank setting position (Mpa_abs*).
(Pipe inner pressure during pump operation before heating device operates = water supply
pressure)
P2: Maximum pressure used during operation at tank setting position (MPa_abs*).
(= safety valve setting pressure)
* The absolute pressure value (abs.) is obtained by adding the atmospheric pressure (0.1 MPa (1
bar)) to the gauge pressure.
Water temperature and expansion coefficient (Ɛ)
Hot water temperature
(°C)
0 0.0002 50 0.0121
4 0.0000 55 0.0145
5 0.0000 60 0.0171
10 0.0003 65 0.0198
15 0.0008 70 0.0229
20 0.0017 75 0.0258
25 0.0029 80 0.0292
30 0.0043 85 0.0324
35 0.0050 90 0.0961
40 0.0078 95 0.0967
45 0.0100 - -
Expansion rate
(Ɛ)
Water temperature and expansion coefficient (Ɛ)
Hot water temperature
(°C)
Expansion rate
(Ɛ)
Example
Maximum Hot Water temperature: 55°C, initial
water charge: 0.2MPa and system volume: 200 L.
The calculated Vessel capacity (V) is 11.6 L:-
11.6
=
0.0145
1
x
-
In this case V < 12 L therefore the internal
expansion vessel is sufficient.
There is no need to install an external expansion
vessel.
200
(0.2+0.1)
(0.3+0.1)