RHEEM COMMERCIAL WATER HEATING TRAINING

transcript

TRAINING COURSE OBJECTIVES

• Introduction to Rheem Commercial Booklet• Range appreciation• Familiarise key design / installation criteria• Introduction to manifolding• Introduction to sizing• Value added service

Commercial Water Heating course contents

• Chapter 1 - Range overview - Commercial Booklet• Chapter 2 - Heat Pump • Chapter 3 - Commercial Solar• Chapter 4 - Equaflow Manifolding • Chapter 5 - Commercial Continuous Flow• Chapter 6 - Commercial Storage Gas systems• Chapter 7 - Raypak Heating and Hot Water• Chapter 8 - Commercial Electric• Chapter 9 - Guardian Warm Water • Chapter 10 – Pump Sets• Chapter 11 - Sizing and Selecting• Chapter 12 - Commercial installation and design

Chapter 1

Range Overview&

Rheem Commercial Booklet

Chapter 2 - Commercial Heat Pump

COMMERCIAL HEAT PUMP LAYOUTS

Chapter 3 - Commercial Solar

Commercial Solar

• Terminology– Split / Pumped / Loline– Close Coupled / Thermosiphon / Hiline– Direct / Indirect (Premier Hiline)

Commercial Solar Loline

• Pumped system– Collectors and tank are split– Fluid is pumped between collectors and tanks– Can be on same level or different levels

• Direct system– Consumed water passes through the collectors– Partial frost protection

• In series boost

Commercial Solar Loline

• 325L and 410L vitreous enamel storage tanks– Manifold tanks as required

• NPT200 collector– Painted aluminium selective surface– 7 riser tubes– Good performance in all regions

Commercial Solar Loline• Frost– Limited frost protection– Frost sensor strategy– Electric or gas frost heater

• Secondary Solar Recirculation– Maximum solar energy use– reduces energy use

• BMS output– Run and fail status

Commercial Solar Premier Hiline

Commercial Solar Premier Hiline• Thermosiphon system– Collectors and tank are close coupled– Fluid rises through collectors naturally to tank– Tank is always above collectors

• Indirect system– Transfer fluid passes through the collectors and

transfers heat to tank via heat exchanger– Full frost protection

• In series or in- tank electric boost

Commercial Solar Premier Hiline

• 300L stainless steel tank• Manifold systems as required• 8 systems per array, multiple arrays possible• S200 collector– Steel collector– Painted selective surface– Good performance in all regions

Flat Plate vs Evacuated TubeCollectors

EQUA-FLOW MANIFOLDING

Chapter 4

EQUA-FLOW BASICS

In Line

• Header diameters for cold/hot to be equal• Branch diameters for cold/hot to be equal• Hydraulic water flow “In one side, out the opposite”• Balanced performance per unit. Full delivery capacity from system

Flow direction In

Flow direction

Back to Back

Flow direction In

Flow direction

EQUA-FLOW BASICS

0+1+1=2

EQUA-FLOW BASICS

PATH of LEAST RESISTANCE

MORE EQUA-FLOW PRINCIPLES

0+2+1+1+2=6 1+2+1+2=6 1+2+2+1+0=6

ANGLED MANIFOLD 3 + bend1

1 3 + bend

BACK TO BACK MANIFOLD

H6:0.75+1+1 = 2.75

H4:0.75+1+1 = 2.75

H2:0.75+1+1 = 2.75

H1:0+1+1+0.75 = 2.75

H3:1+1+0.75= 2.75

H5:1+1+0.75 = 2.75

10.75 1

EQUAFLOW PRINCIPLES IN PRACTICE

When designing/ inspecting complicated manifolds consideration must be given to primary loops as well as hot and cold headers

COMPLICATED EQUAFLOW PRINCIPLES IN PRACTICE

EQUAFLOW PRINCIPLES IN PRACTICE

COMPLICATED EQUAFLOW PRINCIPLES IN PRACTICE

BRANCHES• NEVER use non-return valves or pressure

limiting valves in the branch– These create imbalance in the branches

• Non-return and pressure reducing valves must be in a train on the cold water inlet

COLD WATER SUPPLY

TO WATER HEATER MANIFOLD

BRANCHES• Last branch should be

a T piece, not an elbow, to maintain equal resistance in all branches

T PIECE

Chapter 5 - Commercial CFWH

RHEEM INDOOR CFWH – FLUE SYSTEMSUSE MM AND FF ADAPTERS IF HORIZONTAL LENGTH OF HORIZONTAL TERMINATING FLUE EXCEEDS 2.7M

USE CONDENSATE DRAIN & TRAP IF VERTICAL SECTION OF HORIZONTAL TERMINATING FLUE EXCEEDS 2M

Rheem Multipak, Tankpak, Commpak and Commpak PlusCommercial Continuous Flow

Hot Water Solutions

Chapter 6 - Commercial Gas Storage

RHEEM Commercial Gas Storage

• Work horse of the industry• 3 input sizes – 50, 110, 200MJ/hr• Indoor and outdoor models• Multi-fin flue technology• Flue damper• Hot Surface Ignition• Up to 82oC• Room sealed flue

HD Gas Layout

631275 Room Sealed Flue• Converts outdoor model to indoor room sealed• Ideal where no ventilation, contaminated air

supply or fluing to roof impractical• 3m and 3 x 90o bends• Re-use flue terminal• Kit P/No 299135

Chapter 7 – Raypak Heating and Hot Water

Raypak Layouts

Chapter 8 - Commercial Electric Storage

RHEEM Commercial Electric Storage

• Work horse of the industry• 2 x 3 element models – 50 & 315L• 1 x 6 element model – 315L• Up to 36kW output• Indoor and outdoor installation• Heavy Duty enamel• Larger anode• Models up to 82oC

HD Electric Layout

Chapter 9 - Rheem Guardian Warm Water

Chapter 10 - Pump Sets

Deluxe Pump Sets

• Deluxe Models• UPS 20-60N and 32-80N pumps• Individual Auto, Off, Manual switches• Individual Run and Fail indicators• Timer control• Isolation and check valves included• BMS output

Standard Pump Sets

• Standard Models• UPS 20-60N and 32-80N pumps• Single Auto, Off, Manual switch• Timer control• Isolation and check valves included

Chapter 11

• Sizing and selecting...

Energy Consumption It takes 4.2kJ of heat energy to raise 1litre of water (or 1 kg)

of water 1 degreeE = L x 4.2 x dT

Example : To raise 500 litres by 32 degrees (from 10C to 42C)Energy consumption = 500 x 4.2 x 32 = 67,200kJ or 67.2MJ

Plant efficiency must also be considered. If the plant operates at 80% efficiency, then;Energy required = 67.2 / 0.8 = 84MJ

Typical Hot Water Usage Assumptions

OfficesOffice peak period 60 minutes– Water per person 0.5 litres – Area per person 10m2

– Occupants

Gymnasium peak period 30 minutes– Water per person 25 litres

Typical Hot Water Usage AssumptionsFood ServiceRestaurant Peak Period – 2 hours(temperature requirements) – Bistro per Meal 5.0 litres– Coffee Shop per Meal 3.5 litres– Auditorium per Meal 3.0 litres– Restaurant per Meal 5.5 litres– Takeaway Shop per Meal– Café per Meal 3.0 litres– Hotel Kitchen per Meal 6.0 litres

ApartmentsPeak period 60 minutes

– Bed-sitter 25 litres– 1 Bedroom 40 litres– 2 Bedroom 70 litres– 2 Bedroom w/en suite 75 litres– 3 Bedroom 80 litres– 3 Bedroom w/en suite 90 litres– 4 Bedroom 100 litres– Penthouse 150 litres

MotelMotel peak period 60 minutes(Assume 2 people per room)– Shower 1 & 2 Star 20 litres /person– Shower 3 Star 25 litres /person– Shower 4 Star 30 litres /person– Shower 5 Star 45 litres /person– Shower Family/Spa 100 litres /person

Sizing example...

• Motel• 100 rooms• 5 star accommodation• Central electric plant• Moderate climate• Refer to commercial booklet...

Sizing example... Motel

• Showers = 50 x 2x 45 = 4,500L/1hr peak• Moderate climate = 50oC rise• Central electric plant:– 5 x 616315 with 6 x 6kW elements

Hot Water Usage Assumptions

Nursing HomePeak period 180 minutes– Bedpan 2.5 litres / bed– Shower 25 litres / bed– Cleaning water 10 litres / bed– Water per meal 5.5 litres

Laundry peak 300 minutes– Laundry (1.2kg per bed) 10 litres / kg

Selecting a water heating system

• Usage profiles...Have they changed?• Peak Period in Litres/hr (e.g. 1hr)• Redundancy• Daily Load in Litres (Solar)...• Water delivery Temperatures• Plant Location - Indoor or Outdoor• Flue location & termination (room sealed?)• Circulation Systems...considerations

Sporting Facility Case StudyFootball Club - Tasmania

Sizing example...

• Local football club• 15 shower outlets @ 6 litres per minute (hot)• 35 players inc umpires• Commercial heat pump system• Refer booklet...

Sizing example...

• Players and Umpires = 35• Shower time, say 10 mins• Peak duration = 30mins• Showers = 35 x 6L/min x 10 = 2,100 litres• Plant selection:• 6 x 610430 storage tanks• 1 x 953022 heat pump• Recovery @10C ambient =244L/hr = 9hrs

SELECTION & SIZING...

• Diversity...• The difference between the maximum possible load on

a water heating system if all outlets were in use at once and the “likely” load at any given time.

• Example... • In a multi story accommodation building, only a

predictable percentage of taps will be turned on at any given time, however it can be expected that all taps in a shower block of a sporting facility can be turned on at once and will require full heated water flow.

SELECTION & SIZING

CFWH PLANT or STORAGE PLANT... What to consider?• Footprint availability e.g. solar• Storage volume?• Maintenance/removal• Flow rates• Gas and water pressure• Fluing• Energy/fuel types

Chapter 12

• Commercial Installation and Design Requirements

82oC Dead Leg Operation

Primary Pump Requirements• Used for Raypak, Solar and Heat Pump• Non return valve is not required after primary pump.• Spindle must be horizontal• Pump is not weather proof – must be covered

Primary Pump

Isolation Valve

Note: Pump

shaft must be

horizontal

NOT EQUA-FLOW

PUMP SPINDLE VERTICAL

Clearances

CASE STUDY #2Rheem Commercial Water Heating Systems

Rheem Solar preheated, gas storage with a warm water system.

Commercial application – Large nursing home

Including a commercial laundry

Commercial kitchen

Commercial sinks

Electric boost on sink

Commercial dishwashing machine

Water must be at sanitizing temperature i.e. 77 degrees

The solar arrayTo achieve the energy rating for the building, solar has been chosen.

Often solar is a preferred method to achieve the energy reduction on site.

Note - north facing collectors

Note - the fall protection

The panels are set in two arrays of 8 collectors

16 Rheem solar panels – ‘primary source of heat’

Each square meter(approx) of panel requires approx. 60 litres of solar storage tank capacity!

Collector connections

Primary flow and return to solar panels.

Temperature probe wired to solar controller and to the circulating pump. It works on a 8 degree C differential.

Automatic air eliminator on the return line out of the panels.

The return hot water line to storage tanks

Note the pipe insulation to reduce heat loss which is measured in ‘ watts ‘ per meter

Lagging must be UV resistant and meet AS3500.4

Four Rheem 430 litre solar storage cylinders

( 1720 litre capacity )

Rheem Gas boost mains pressure storage units.

Rheem Solar controller

Green light indication of system cycle.

Note - the solar return pipe work from the panels.

Primary flow and return from solar panels

Note – the isolation valves

Note – the pipe lagging

Commercial site assistance

THANK YOU FOR YOUR TIME TODAY

• We trust you have enjoyed and benefited from this training course...

RHEEM COMMERCIAL WATER HEATING TRAINING

Documents