Toshiba HWS-2101CSHM3, HWS-3001CSHM3, HWS-1501CSHM3 INSTALLATION MANUAL

AIR TO WATER HEAT PUMP SYSTEM

HOT WATER CYLINDER

INDIRECT HEATING METHOD

CLOSED OUTLET (UNVENTED)

INSTALLATION AND SERVICE MANUAL

HWS-1501CSHM3-UK HWS-2101CSHM3-UK HWS-3001CSHM3-UK

36006030_Issue_D

INSTALLATION AND SERVICING INSTRUCTIONS, FOR AIR TO WATER HEAT

Maximum water supply pressure to PRV 1.6MPa (16.0 bar) Operating pressure of unit 0.35MPa (3.5 bar) Expansion vessel charge pressure 0.35MPa (3.5 bar) Expansion valve setting 0.6MPa (6.0 bar) Nominal storage capacity of units (see Section 2 Table 2) Max. primary working pressure 0.3MPa (3.0 bar) Opening temperature of T&P Relief Valve 90deg C Opening pressure of T&P Relief Valve 1.0 MPa (10 bar)

PUMP SYSTEM WATER CYLINDER. PLEASE LEAVE THIS MANUAL WITH THE

UNIT FOR FUTURE REFERENCE.

CONTENTS

SECTION CONTENT PAGE

1 INTRODUCTION . . . . . . . 2

2 GENERAL REQUIREMENTS . . . . . . 3

3 INSTALLATION - GENERAL . . . . . . 4

4 INSTALLATION – INDIRECT UNITS . . . . . 9

5 COMMISSIONING . . . . . . . 9

6 MAINTENANCE . . . . . . . 10

7 FAULT FINDING AND SERVICING . . . . . 11

8 USER INSTRUCTIONS . . . . . . 13

9 GUARANTEE . . . . . . . . 14

1.0 INTRODUCTION

IMPORTANT: THIS APPLIANCE IS NOT INTENDED FOR THE USE BY PERSONS (INCLUDING CHILDREN) WITH REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES, OR LACK OF KNOWLEDGE AND EXPERIENCE, UNLESS THEY HAVE BEEN GIVEN SUPERVISION OR INSTRUCTION CONCERNING THE USE OF THE APPLIANCE BY A PERSON RESPONSIBLE FOR THEIR SAFETY.

This unit, for use with the air to water heat pump system, is a purpose designed unvented water cylinder. The unit has a stainless steel inner vessel which ensures an excellent standard of corrosion resistance. The outer casing is a combination of resilient thermoplastic mouldings and plastic coated corrosion proofed steel sheet.

Table 1: Operational Summary

The unit is supplied complete with all the necessary safety and control devices needed to allow connection to the cold water mains. All these components are pre-adjusted.

This appliance complies with the requirements of the CE marking directive and is KIWA approved to show compliance with Building Regulations (Section G3) and UK Water Regulations.

The following instructions are offered as a guide to installation which must be carried out by a competent plumbing and electrical installer in accordance with Building Regulation G3, The Building Standards (Scotland) Regulations Section 4 standard 4.9, or The Building Regulations (Northern Ireland) Part P Section P5.

NOTE: Prior to installation the unit should be stored in an upright position in an area free from excessive damp or humidity.

IMPORTANT: PLEASE READ ALL THESE INSTRUCTIONS BEFORE COMMENCING INSTALLATION

2.0 GENERAL REQUIREMENTS

Type Nominal

capacity

(litres )

W eight of

unit full

(kg)

INDIREC T

HWS-1501CSHM3-UK

150

210

300

HWS-2101CSHM3-UK

HWS-3001CSHM3-UK

181

251

360

Model

Nomin a l

ca pa ci ty pe r d a y pe r ye a r

(litres ) (kW h/ 24h) (kW h/365d)

150 1.45 529.3 210 1.91 697.2 300 2.52 919.8

Standing He at Loss

2.1 COMPONENTS SUPPLIED

1. Unvented water cylinder incorporating cylinder heater and thermal controls

2. Factory tted Temperature/Pressure Relief Valve

3. T&P Valve insulation and housing.

4. Cold Water Combination Valve.

5. Expansion Vessel and mounting bracket.

6. Tundish.

7. Compression nuts and olives

8. Immersion heater key spanner

2.2 SITING THE UNIT

The unit must be installed vertically. Although location is not critical, the following points should be considered:

• The unit should be sited to ensure minimum dead

leg distances, particularly to the point of most frequent use.

• Avoid siting where extreme cold temperatures

will be experienced. All exposed pipework should be insulated.

• The discharge pipework from the safety valves

must have minimum fall of 1:200 from the unit and terminate in a safe and visible position.

• Access to associated controls and cylinder heater

should be possible to allow for periodic servicing and maintenance.

• Ensure that the base chosen for the unit is level

and capable of permanently supporting the weight when full of water (see Table 2).

bar) that is controlled by the Cold Water Combination Valve. The Cold Water Combination Valve can be connected to a maximum mains pressure of 1.6MPa (16 bar).

2.4 OUTLET/TERMINAL FITTINGS (TAPS, ETC.)

The unit can be used with most types of terminal ttings. It is advantageous in many mixer showers to have balanced hot and cold water supplies. In these instances a balanced pressure cold water connection should be placed between the Cold Water Combination Valve and the water cylinder. Outlets situated higher than the unit will give outlet pressures lower than that at the heater, a 10m height difference will result in a

0.1MPa (1 bar) pressure reduction at the outlet.

2.5 LIMITATIONS

The unvented water cylinder should not be used in association with any of the following:

• Ascending spray type bidets or any other class 1

back syphonage risk requiring that a type A air gap be employed.

• Situations where maintenance is likely to be

neglected or safety devices tampered with.

• Water supplies that have either inadequate pres-

sure or where the supply may be intermittent.

• Situations where it is not possible to safely pipe

away any discharge from the safety valves.

• In areas where the water consistently contains a

high proportion of solids, e.g. suspended matter that

could block the strainer, unless adequate ltration can

be ensured.

Table 2: Unit weights

2.3 WATER SUPPLY

Bear in mind that the mains water supply to the property will be supplying both the hot and cold water requirements simultaneously. It is recommended that the maximum water demand is assessed and the water supply checked to ensure this demand can be satisfactorily met.

NOTE: A high mains water pressure will not always

guarantee high ow rates.

Wherever possible the mains supply pipe should be 22mm. We suggest the minimum supply requirements should be 0.15MPa (1.5 bar) pressure and 20 litres

per minute owrate. However, at these values outlet owrates may be poor if several outlets are used si-

multaneously. The higher the available pressure and

owrate the better the system performance.

The unit has an operating pressure of 0.35MPa (3.5

Table 3: Standing heat losses

Based on an ambient air temperature of 20oC and a stored water temperature of 65oC

3.0 INSTALLATION – GENERAL

COLD INLET

CONNECTION

COLD

SUPPLY

CHECK

VALVE

SECONDARY

RETURN

SECONDARY

CIRCULATION

PUMP

SWEPT

TEE

3.1 PIPE FITTINGS

All pipe ttings are made via 22mm compression ttings directly to the unit. The ttings are threaded 3/4”BSP male parallel should threaded pipe connec-

tions be required.

3.2 COLD FEED

A 22mm cold water supply is recommended however,

if a 15mm (1/2”) supply exists which provides sufcient ow this may be used (although more ow

noise may be experienced). A stopcock or servicing valve should be incorporated into the cold water supply to enable the unit and its associated controls to be isolated and serviced.

3.3 COLD WATER COMBINATION VALVE (FIG 1)

The Cold Water Combination Valve can be connected anywhere on the cold water mains supply prior to the Expansion Vessel (see Fig. 5). The Cold Water Combination Valve is installed as a complete one-piece unit. The valve incorporates the Pressure Reducer, Strainer, Expansion Valve and Check Valve. Ensure

that the valve is installed with the direction of ow

arrows pointing in the right direction. No other valves should be placed between the Cold Water Combination Valve and the unit. The Expansion Valve connection must not be used for any other purpose.

3.5 EXPANSION VESSEL

The Expansion Vessel accommodates expansion that results from heating the water inside the unit. The unit is pre-charged at 0.35MPa (3.5 bar). The Expansion Vessel must be connected between the Cold Water Combination Valve and the water cylinder (see Fig.

5). The location of the Expansion Vessel should allow access to recharge the pressure as and when necessary, this can be done using a normal car foot pump. It is recommended that the Expansion Vessel is adequately supported. An Expansion Vessel wall mounting bracket is supplied for this purpose

3.6 SECONDARY CIRCULATION

If secondary circulation is required it is recommended that it be connected to the cylinder as shown in Fig. 2 via a swept tee joint into the cold feed to the unit. The secondary return pipe should be in 15mm pipe

and incorporate a check valve to prevent backow. A

suitable WRAS approved bronze circulation pump will be required. On large systems, due to the increase

in system water content, it may be necessary to t an

additional expansion vessel to the secondary circuit. this should be done if the capacity of the secondary circuit exceeds 10 litres. Pipe capacity (copper)

15mm o/d = 0.13 l/m (10 litres = 77m) 22mm o/d = 0.38 l/m (10 litres = 26m) 28mm o/d = 0.55 l/m (10 litres = 18m)

EXPANSION VALVE

COLD MAINS CONNECTION (22mm)

PRESSURE REDUCING VALVE HOUSING

PRESSURE REDUCING VALVE CARTRIDGE (3.5 bar)

FIG. 1 Cold Water Combination Valve

3.4 DRAIN TAP

A suitable draining tap should be installed in the cold water supply to the unit between the Cold Water Combination Valve and the heater at as low a level as possible. It is recommended that the outlet point of the drain pipework be at least 1 metre below the level of the cylinder (this can be achieved by attaching a hose to the drain tap outlet spigot).

EXPANSION VALVE OUTLET (15mm)

OUTLET CONNECTION (22mm)

FIG. 2 Secondary circulation connection

3.7 OUTLET

The hot water outlet is a 22mm compression tting

located at the top of the cylinder. Hot water distribution pipework should be 22mm pipe with short runs

of 15mm pipe to terminal ttings such as sinks and

basins. Pipe sizes may vary due to system design.

FIG. 3 General Dimensions and Performance

NOMINAL CAPACITY(litres)

A (mm)

B (mm)

C (mm)

D (mm)

SURFACEAREA (sq.m)

HOTWATER OUTPUT AT60ºC (litres)

MIXED HOTWATEROUTPUTAT40ºC(litres)

HEATLOSS (kWh/24h)

HEATING TIME 15ºC TO60ºC- USING ELECTRIC IMMERSION HEATERONLY(mins)

CAPACITYHEATED USINGELECTRIC IMMERSION HEATERONLY(litres)

HEATING TIME 10ºC TO40ºC- USING HEAT PUMPONLY(mins)

HEATING TIME 10ºC TO60ºC- USING HEAT

PUMPAND ELECTRIC IMMERSION HEATER(mins)

RECOVERY TIME - FOLLOWING70%DRAW OFF (min

NOTE: Capacity heated using the electric immersion heater only.

150 150 150 210 210 210 300 300 300

8kW 11.2kW 14kW 8kW 14kW 8kW 14kW

315 315 315 315 315 315 315 315 315

354 354 354 354 354 354 354 354 354

800 800 800 1184 1184 1184 1474 1474 1474

1090 1090 1090 1474 1474 1474 2040 2040 2040

0.55 0.55 0.55 0.68 0.68 0.68 0.79 0.79 0.79

102 102 102 163 163 163 254 254 254

243 243 243 329.5 329.5 329.5 476 476 476

1.45 1.45 1.45 1.91 1.91 1.91 2.52 2.52 2.52

123 123 123 188 188 188 262 262 262

102 102 102 163 163 163 254 254 254

24 23 22 35 33 31 49 45 41

65 63 61 92 85 78 160 154 147

53 5

3 51 71 68 65 103 99 95

HEAT PUMP RATING (kW)

11.2kW 11.2kW

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