RHEEM COMMERCIAL WATER
HEATING TRAINING
TRAINING COURSE OBJECTIVES
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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
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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
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
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
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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 Tube
Collectors
Chapter 4
EQUA-FLOW BASICS
EQUA-FLOW BASICS
• 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
In Line
Flow
direction In
Flow
direction
Out
EQUA-FLOW BASICS
Flow
direction
Out
Back to Back
Flow
direction In
EQUA-FLOW BASICS
1
0+1+1=2
A
0
1
B
PATH of LEAST RESISTANCE
B
1
1
A
1
1
MORE EQUA-FLOW PRINCIPLES
A
B
1
2
0+2+1+1+2=6
1
1+2+2+1+0=6
1+2+1+2=6
2
ANGLED MANIFOLD
3 + bend
1
A
1
3 + bend
B
BACK TO BACK MANIFOLD
0.75
1
H2:
0.75+1+1
= 2.75
1
H4:
0.75+1+1
= 2.75
H6:
0.75+1+1
= 2.75
A
B
H1:
0+1+1+0.75
= 2.75
1
H3:
1+1+0.75
= 2.75
1
H5:
1+1+0.75
= 2.75
0.75
EQUAFLOW PRINCIPLES IN PRACTICE
COMPLICATED EQUAFLOW
PRINCIPLES IN PRACTICE
When designing/ inspecting
complicated manifolds
consideration must be given to
primary loops as well as hot and
cold headers
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
pressure
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• Non-return and
reducing
valves
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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 SYSTEMS
USE MM AND FF ADAPTERS IF
HORIZONTAL LENGTH OF
HORIZONTAL TERMINATING FLUE
EXCEEDS 2.7M
TRIM
RING
USE CONDENSATE DRAIN &
TRAP IF VERTICAL SECTION OF
HORIZONTAL TERMINATING
FLUE EXCEEDS 2M
Rheem Multipak, Tankpak,
Commpak and Commpak Plus
Commercial Continuous Flow
Hot Water Solutions
Chapter 6 - Commercial Gas Storage
RHEEM Commercial Gas Storage
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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
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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
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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
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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 degree
E = 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
Offices
Office 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 Assumptions
Food Service
Restaurant Peak Period – 2 hours
(temperature requirements)
– Bistro per Meal
– Coffee Shop per Meal
– Auditorium per Meal
– Restaurant per Meal
– Takeaway Shop per Meal
– Café per Meal
– Hotel Kitchen per Meal
5.0 litres
3.5 litres
3.0 litres
5.5 litres
3.0 litres
6.0 litres
Typical Hot Water Usage Assumptions
Apartments
Peak period 60 minutes
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Bed-sitter
1 Bedroom
2 Bedroom
2 Bedroom w/en suite
3 Bedroom
3 Bedroom w/en suite
4 Bedroom
Penthouse
25 litres
40 litres
70 litres
75 litres
80 litres
90 litres
100 litres
150 litres
Typical Hot Water Usage Assumptions
Motel
Motel peak period 60 minutes
(Assume 2 people per room)
– Shower 1 & 2 Star
– Shower 3 Star
– Shower 4 Star
– Shower 5 Star
– Shower Family/Spa
20 litres /person
25 litres /person
30 litres /person
45 litres /person
100 litres /person
Sizing example...
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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 Home
Peak 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
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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 Study
Football Club - Tasmania
Sizing example...
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Local football club
15 shower outlets @ 6 litres per minute (hot)
35 players inc umpires
Commercial heat pump system
Refer booklet...
Sizing example...
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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?
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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
Isolation Valve
Primary Pump
NOT EQUA-FLOW
PUMP SPINDLE VERTICAL
Clearances
CASE STUDY #2
Rheem 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 array
To 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...