Rheem 86H-25 Installation guide

WARNING
•Please read this Installation and Warranty Manual carefully before installation and use of the appliance. In particular, please pay
special attention to the Safety Instruction and Warnings. These instructions must be read in conjunction with other instructions
affixed to the appliance.
•This appliance must only to be installed by persons authorised for the installation of electric water heaters in accordance with all
Local and Government Regulations.
•For Safe Performance, this Storage Water Hear is supplied with a Thermostat, Thermal Energy Cutout, and Temperature &
Pressure Relief Valve. These devices must be installed and not tampered with or removed. The water heater must not be
operated unless each of these devices is fitted and is in working order.
•Please leave this manual with the homeowner upon completion of installation.
TECHNICAL DATA AND PRODUCT DIMENSIONS
RIGHT HAND CONNECTION SHOWN
Model Number
86H-25
86H-40
86H-55
86H-75
86H-100
Actual Capacity
Litres
25
40
55
75
100
Rated Power
kW
2.7-3.3 kW, 220-240 Va.c. 50Hz
Time for Hot Water at 40ºC Rise
min.
23
37
51
70
93
Length
A
mm
460
664
868
1140
973
Diameter
B
mm
377
461
Inlet & Outlet Spacing
C
mm
150
240
Mount Hole Spacing
D
mm
320
340
477
812
643
Voltage Input
V
220 - 240V a.c. / 50 Hz
Temperature Setting
ºC
65
Rated Pressure
kPa
1000
T&P Relief Valve Pressure
kPa
1000
Pipe Sizes for Water Inlet & Outlet
Rp 20 (3/4" x 14)
Pipe Size for Safety Valve
Rp 20 (3/4" x 14)
Shipping Weight
kg
17
22
25
30
36
Diagram 1
FEATURES
•Mains pressure storage water heater ensures stable hot
water supply.
•Various tank capacities available –allowing simultaneous
multi point hot water usage.
•The adjustable thermostat automatically controls the
electricity supply to the heating unit so constant
temperature is maintained.
•Safety devices such as over temperature cut out and
Temperature and Pressure Relief (TPR) valve are
standard features.
•The temperature is preset at 65°C for safety and is
economical to operate. The temperature thermostat
comes complete with built in reset switch.
•The life span of the tank is greatly extended by Rheem’s
exclusive “Rheemglas” vitreous enamel lining and
sacrificial anode rod, ensuring years of trouble free
performance.
•Thick Polyurethane foam is environmentally friendly, free
of CFC enabling the water heater to be more energy
efficient by retaining heat and reduce operating costs.
•Heater jacket is protected by industrial strength
prepainted steel –a thick gauge precoated zinc steel
having exceptional strength and corrosion resistance.
ELECTRIC STORAGE WATER HEATERS
Rheem Manufacturing Company (Singapore) Pte Ltd
INSTALLATION, OPERATING INSTRUCTIONS AND WARRANTY CONDITIONS
1

SAFETY
•This appliance is not intended for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction
concerning the safe use of the appliance by a person
responsible for their safety. Children should be
supervised to ensure that they do not play with the
appliance.
•CAUTION: In order to avoid a hazard due to inadvertent
resetting of the thermal cutout, this appliance must not be
supplied through an external switching device, such as a
timer, or connected to a circuit that is regularly switched
on and off by an appliance or utility.
•The water heater must have provision for drainage in the
event that the water heater leaks or connection pipes
break.
•The water heater is rated 220-240V/50Hz AC, single
phase.
•The installation of the Electrical power supply cable must
be correctly sized to safely carry the maximum current
draw of the appliance. Ensure all earth wires and
connections are separated from the neutral circuit.
•Ensure that the electrical connections are undertaken by
a qualified electrician complying with Local Code of
Practice.
•Power must not be turned on until the water heater is
filled with water. Open all hot water taps/faucets to
release trapped air until only water is discharged.
•Temperature over 50°C may cause scalding. Please mix
cold water with hot water to obtain the right bathing
temperature.
•Please operate the Temperature and Pressure Relief
Valve (TPR) manually at least once every 6 months to
remove lime deposits and verify that the drain pipe from
the valve is not blocked.
•Power must be turned off before any service and
maintenance work can commence. All work must be
performed by a qualified technician.
•For replacement of parts, please use original parts from
manufacturer. Use of non-approved parts will result in a
void the manufacturer’s warranty.
•Water may drip from the discharge pipe of the TPR valve
during normal expansion. The discharge pipe should be
left open to the atmosphere preferably 150 mm above the
nearest floor trap. On no accounts must the drain pipe
be plugged. Blockage of the TPR discharge pipe may
cause serious damage and will void the manufacturer’s
warranty.
Warning –Scalds Minimisation. To minimise scalding,
especially for those people in high risk categories ie.
Young children, people with incapacitating medical
conditions, elderly people, etc, this unit must be installed
in accordance with all local and government regulations,
and the use of secondary devices such as a suitable
tempering valve or anti-scald water shut-off valve. (If a
tempering valve is used, refer to its servicing instructions
for periodic maintenance.)
•Hot water must be stored at a minimum of 60°C to inhibit
the growth of Legionella bacteria.
•All sanitary outlets used primarily for personal hygiene
shall deliver hot water not exceeding: a). 45°C for early
childhood centres, primary and secondary schools and
nursing homes or similar facilities for young, aged, sick or
disabled persons; and b). 50°C in all other buildings.
INSTALLATION AND CONNECTION
CHOOSING WHERE TO INSTALL
•The water heater must be installed indoors.
•The wall must be strong enough to support the water
heater filled with water using the universal mounting
brackets and masonary anchors provided.
•The heater should be installed as near to the point of use
as possible.
•Ensure that sufficient and safe space is available for
servicing of the water heater to both adjacent wall and/or
ceiling for access to the element, sacrificial anode and
Temperature and Pressure Relief Valve.
•Leave adequate clearance beside the appliance
(preferably the length of the water heater), for inspection
or service of the anode through the case lid. If
inadequate room is available then the appliance may
have to be disconnected and removed for service.
•There must be a floor trap near installation point for safe
discharge of the Temperature and Pressure Relief Valve.
•The water heater, electrical connections, and electric
leakage protector should be protected against any
contact or splashing water.
INSTALLATION OF THE WATER HEATER
•Mark the drilling position for locating expansion bolts on
the wall or ceiling as shown in Diagram 2. The two upper
holes of the universal mounting brackets must be in the
same horizontal line.
•Drill holes on the wall using a Ø12mm masonary drill (do
not damage the electric cable and pipe work inside the
wall). Insert the four (4x) masonary anchor bolts provided
complete with nut and washer and tighten until the anchor
is permanently affixed to the wall. Loosen off the anchor
nuts and washers.
•Hang up the water heater on the wall and tighten the
anchor bolts (with washers) to the universal mounting
bracket as shown in Diagram 3. The mounted heater
must be installed horizontal.
•Use the quantity six (6) self-tap screws to secure the
water heater to the holes in the universal mounting
brackets.
MODEL
HOLE
SPACE
'A'
86H-25
86H-40
86H-55
86H-75
86H-100
320
340
477
812
643
Diagram 2. Mounting Hole Dimension by Model
Diagram 3. Installation Options
CONNECTION –PLUMBING
▪Pipe Material :
The pipes connecting to the inlet and outlet of the water
heater must be strong enough to withstand water
pressure up to 1.40 MPa.
2

▪Pipe Size :
¾” (20mm) OD copper pipes are to be used for cold
water inlet and hot water outlet –refer to Diagram 5.
It is the responsibility of the installer to ensure all
pipework & fittings are correctly lagged and do not leak.
▪Connection :
Water connections are located at the side of the heater.
Heat must not be applied at these connections as it can
damage the internal water tubes of the appliance –refer
to Diagram 4.
Diagram 4. Internal Water Pipework
Both the inlet and outlet water connections are located at the
end of the water heater, with the upper connection being outlet
and lower connection being inlet. The cold water tap is fitted to
the inlet as shown in Diagram 5. As the temperature is high at
the outlet, a mixing valve which mixes hot water with cold
water is suggested to be fitted. If the outlet tap is not close to
the water heater, thermal insulation material is recommended
to insulate the hot water pipe in order to reduce heat loss.
Diagram 5. Plumbing Connection
INSTALLATION OF THE TPR VALVE
•The TPR valve is supplied with the water heater. This is
to protect the heater from excessive pressure and
temperature.
•Seal the thread with the Teflon tape –never use hemp.
•Make certain the edge of the Teflon tape does not
protrude past the end of the thread. Screw the valve into
the fitting marked TPR and leave the valve outlet pointing
down. Tighten the valve using the spanner flats –not the
valve body.
•To minimise potential for scalding (particularly concerning
young children), a copper drain pipe must be fitted to the
TPR to carry the discharge away from the heater so that
the hot water discharged will not cause injury, damage or
nuisance. A drainpipe must be fitted for water discharge
to a floor waste trap (drain). The pipework from the TPR
valve to the floor waste trap should be as short as
possible with no restrictions.
•½” (15mm) OD copper pipe is recommended. The
pipework should have no more than three (3) right angle
bends, in a continuous downward direction, and installed
in a frost-free environment.
•DO NOT RESTRICT OR BLOCK THE OUTLET OF
THE DISCHARGE PIPE.
•It is normal for water to drip from the TPR discharge pipe
during a heat up cycle.
•Do not drill holes in the sides of this appliance. Any
damage caused by drilling will void the warranty.
•This pipe must be left open to the atmosphere. The
valve or drain valve outlet pipe must not be sealed or
blocked.
FILLING THE WATER HEATER
(by authorised person only)
•Open all hot water taps in the house, including the
shower to release air in the pipelines.
•Open the cold water inlet to the water heater.
•When water flows from each hot water tap without any
presence of air, it means that the heater is completely
filled with water. Close all hot water taps.
•Check all plumbing connections for leaks.
CONNECTION - ELECTRICAL
Warning ! DO NOT turn on the electrical power supply to
the water heater until the water heater is completely filled
with water. There will be NO WARRANTY for dry firing of
the appliance.
•Electrical connection must be undertaken by a qualified
electrician and comply with all electrical supply
regulations.
•The water heater shall be connected to single phase AC
supply and its rated power is 220-240V 50Hz. Refer to
rating label for input in wattage.
•Do not install this appliance near any possible contact
with water.
•DO NOT CONNECT THE WATER HEATER WITH A
PLUG AND SOCKET.
•The appliance must be earthed.
•All wiring must conform to local requirements. Ensure the
household connecting wire rating is capable of
withstanding the appliance load. If in doubt, please
consult a qualified electrician.
•For entry to the element cover remove ie two fixing
screws. Connect all ACTIVE and NEUTRAL wires as per
the wiring diagram provided on the inside of the element
access cover. Ensure the incoming EARTH wire is
securely fixed to the earth post provided in the heater
case. Inspect and ensure that all wiring links are secure
prior to fixing the access cover and turning the POWER
on.
•The water heater must be completely filled with water
prior to connection with power.
•To ensure the Over-temperature and Energy Cutout is
set, press the Reset Button on the thermostat.
OPERATION
USING THE APPLIANCE
•It is recommended that the cold water tap always be
turned on first when there is water demand. Likewise,
the hot water tap always be closed first to avoid scalding.
•Mix the hot water with cold water by adjusting the taps to
your satisfactory requirement.
•When the electrical thermostat cuts off, the stored hot
water can still be drawn for use in the household. The
water heater will automatically cut in when the stored
water reaches a minimum set temperature.
•When the inlet water supply is interrupted, the main
power supply to the heater should be switched off to
avoid dry firing. Do not draw off hot water from the
appliance to avoid dry firing of an empty water heater.
3

Diagram 6.
Electrical Connection of the Robertshaw “ST”
Thermostat/Thermal Cut-out
MAINTENANCE
Rheem recommends annual inspections and if required
servicing by a qualified person to ensure safety, peak
performance, longevity and avoid potential loss of warranty of
this appliance.
ISOLATION OF THE WATER HEATER
The water heater should be switched off for servicing or if it is
not used for long periods of time (eg. vacation).
Isolate the water heater according to following steps:
•Isolate/switch off the electrical power supply to the
appliance.
•Close the cold water supply stopcock valve at the inlet of
heater –refer Diagram 6.
TEMPERATURE AND PRESSURE RELIEF (TPR) VALVE
•It is recommended that routine preventative maintenance
is carried out at least once every 6 months to remove
lime deposits and verify that the valve is operating
correctly and the discharge line is not blocked. Failure of
routine inspection may result in the water heater
exploding.
•Continuous leakage of water from the valve may indicate
a problem with the water heater.
•To manually operate, carefully lift and release the lever
handle on the TPR valve to ensure the valve operates
freely and allow several litres of water to flush through
the discharge line. Ensure the discharge water is
directed to the floor drain. Avoid any contact with the
discharge water to avoid scalding.
•If there is no water flowing out, please contact a
serviceman.
•Damage to the water heater due to blockage/restriction
at the overflow outlet will void the manufacturer’s
warranty.
DRAINING THE HEATER AND T&PR REPLACEMENT
Warning! Beware of high temperature water.
•First, disconnect all power to the water heater.
•Turn off the cold water supply to the heater.
•Release the pressure in the heater by carefully operating
the TPR valve release lever/knob.
•Undo the cold water inlet union. Attach a hose to the
heater side of the union. Drain the hose to waste.
•Operate the TPR valve release lever/knob allowing air
into the heater and water to drain via the hose.
•Remove and replace the TPR valve –beware of hot
water.
•To fill heater refer to instruction “Filling the Water Heater”
WARRANTY CONDITIONS
RHEEM MANUFACTURING COMPANY (SINGAPORE) PTE LTD, representing Rheem Water Heating Appliances will guarantee the
heater for a period of twelve months from the date of original installation and operation against defect through faulty materials and
workmanship.
RHEEM MANUFACTURING COMPANY (SINGAPORE) PTE LTD will warrant replacement of any part or parts which prove to have
been defective and which have not been misused or carelessly handled. Rheem reserve the right to decline responsibility where
installation has been incorrectly carried out and not in accordance with the manufacturer’s instructions which accompany each
appliance. Where a failed component is replaced under warranty, the balance of the original heater warranty will remain effective. The
warranty only applies to the water heater and does not cover any plumbing connected to the heater, eg. pressure limiting valve, stop
cock, non return valve, etc. Dated proof of purchase is required prior to commencement of warranty work.
COMMON FAULTS AND REMEDIES
Fault
Possible Causes
Remedies
No hot water flowing out
1) Cold water inlet supply to heater is closed.
2) Pipes are blocked
3) Water supply is cut off by Utility
1) Turn on the inlet tap
2) Dredge the pipe by plumbers
Water temperature
is not hot
1) Terminal block is damaged
2) Earth Leakage Circuit Breaker (ELCB) has operated.
3) Element has failed
4) ECO has activated (Hi Limit)
5) Set temperature is too low
6) Thermostat is damaged
7) Water Heater is working
1) Call electrician
2) Call electrician
3) Call electrician
4) Call electrician
5) Raise the set temperature
6) Call electrician
7) Please wait for a while
Abnormal noise is
coming from the water
heater and pipelines
1) Heating up noise
2) Abnormal sound in pipeline when mains pressure is
not stable
3) Scaling on heater element
4) Water Hammer
1) Normal
2) Normal. Close the cold water inlet tap for a while.
3) Contact a serviceman
4) Contact a serviceman
TPR Temperature and
Pressure Relief Valve is
discharging water
1) Expansion of water during heating up
2) Valve is blocked by foreign materials
3) Excessive cold water pressure
1) Normal
2) Operate valve lever to remove dirt deposit
3) Reduce incoming water pressure
Rheem Water Heating Appliances
Rheem Manufacturing Company (Singapore) Pte Ltd
VN 093 00 01 - 04
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