Paloma PRS-150N Technical Document

Owner’s Guide
and
Installation Instructions
Paloma Room Sealed
Gas Space Heaters
Models
PRS-150N
PRS-250N
PRS-250CN
PRS-150L
PRS-250L
PRS-250CL
Note: This heater must be installed with a genuine Paloma room sealed flue kit. Failure to install a genuine Paloma
room sealed flue kit will result in a potentially unsafe installation and the heater warranty will become null and void.
For installation of the flue kit refer to the installation instructions supplied with the flue kit.
This heater must be installed and serviced by a qualified person.
Please leave this guide with the householder or responsible officer.

Notice to Victorian Customers from the
Victorian Building Authority
This gas space heater must be installed by a licensed person as required by
The Victorian Building Act 1993
Only a licensed person will give you a Compliance Certificate, showing that the work complies
with all the relevant standards. Only a licensed person will have insurance protecting their
workmanship for 6 years. Make sure you use a licensed person to install this space heater and
ask for your Compliance Certificate.
Warning: Upon completion of the installation and commissioning of the space heater, leave
this guide with the householder or a responsible officer. DO NOT leave this guide inside the
heater cover or behind the heater, as it may interfere with the safe operation of the space heater or
ignite when the heater is turned on.
Heater & Installation Information
Heater Packing Contents List
Part
Quantity
Heater
1
Back Cover Kit
Top Cover
1
RH Side Cover
1
LH Side Cover
1
Wall brackets
2
Wall Bracket Screws
2
Hexagon Bolts
4
Exhaust Connection Clamp
1
Air Intake Cable Tie
1
Control Panel Keys *
2
* PRS-250CN and PRS-250CL commercial models only.
PATENTS
This gas space heater may be protected by one or more patents or registered designs in the name of Rheem
Australia Pty Ltd or Paloma Co., Ltd.
® Registered trademark of Rheem Australia Pty Ltd.
™ Trademark of Rheem Australia Pty Ltd.
Date of installation:
Model Nº:
Serial Nº:
Installed by:
Purchased from:

CONTENTS
HOUSEHOLDER OR RESPONSIBLE OFFICER
The ‘About Your Heater’ section is intended for the householder or responsible officer.
The ‘Installation Section’ is intended for the installer but may be of interest
ABOUT YOUR HEATER..............................................................................................................................................4
SAFETY....................................................................................................................................................................5
SAVE A SERVICE CALL..........................................................................................................................................6
REGULAR CARE .....................................................................................................................................................7
OPERATION ............................................................................................................................................................8
Heater Overview ..................................................................................................................................................8
To Turn The Heater ON.......................................................................................................................................8
To Turn The Heater OFF .....................................................................................................................................9
Raising or Lowering the Set Temperature...........................................................................................................9
Setting the Time...................................................................................................................................................9
Timer 1 & Timer 2 Operation ...............................................................................................................................9
Auto Off Timer Operation.................................................................................................................................. 11
Economy Mode................................................................................................................................................. 11
Child Lock Mode ............................................................................................................................................... 12
Filter Light ......................................................................................................................................................... 12
Humidifier Tray.................................................................................................................................................. 12
Vertical Louvre Adjustment............................................................................................................................... 12
Safety Devices.................................................................................................................................................. 12
Central Control – Commercial Models Only ..................................................................................................... 12
INSTALLATION..........................................................................................................................................................13
Heater Location & Clearances.......................................................................................................................... 13
Minimum & Maximum Room Sizes................................................................................................................... 14
Heater Installation Procedure ........................................................................................................................... 14
FLUEING............................................................................................................................................................... 15
Flue Location..................................................................................................................................................... 16
Installation Standards & Requirements............................................................................................................. 16
GAS CONNECTION.............................................................................................................................................. 18
ELECTRICAL CONNECTION............................................................................................................................... 19
Wiring Diagram ................................................................................................................................................. 19
Central Control Connection & Operation – Commercial Models Only.............................................................. 20
CONNECTING HEATER EXHAUST & AIR INTAKE............................................................................................ 21
Connecting Heater Exhaust.............................................................................................................................. 21
Connecting Heater Air Intake............................................................................................................................ 22
HEATER BACK COVER KIT INSTALLATION...................................................................................................... 23
COMMISSIONING................................................................................................................................................. 25
Commissioning Procedure................................................................................................................................ 25
Commissioning Tests & Adjustment Procedures.............................................................................................. 26
FAULT INDICATION ............................................................................................................................................. 29
SERVICE PROCEDURES .................................................................................................................................... 30
Annual Service Procedure ................................................................................................................................ 30
DIMENSIONS AND TECHNICAL DATA............................................................................................................... 31
WARRANTY.......................................................................................................................................................... 35
3

ABOUT YOUR HEATER
HEATER APPLICATION
This room sealed gas space heater is designed for use in a single family domestic dwelling (or commercial premises
for PRS-250CN and PRS-250CL commercial models) for the purpose of room heating. Its use in an application other
than this may shorten its life and void the product warranty.
MODEL TYPE
Congratulations for choosing a Paloma®room sealed gas space heater. Paloma room sealed gas space heaters are
suitable for indoor installation only and require the installation of a genuine Paloma room sealed flue kit.
HOW DO I KNOW IF THE HEATER IS INSTALLED CORRECTLY?
Installation requirements are detailed in the “Installation” section. The heater must be installed:
•by a qualified person, and
•in accordance with the installation instructions, and
•in compliance with Standards AS/NZS 3000 and AS 5601 or AS/NZS 5601.1, as applicable under local
regulations, and all local codes and regulatory authority requirements.
•In New Zealand, the installation must also conform with NZS 5261, as applicable under local regulations, and
the New Zealand Building Code.
HOW YOUR HEATER WORKS
The heater consists of a gas burner, combustion chamber, heat exchanger, combustion fan and an air circulation fan.
Burner combustion air is drawn from outdoors by the combustion fan via the outer flue tube. Hot combustion gases
from the burner pass through the heat exchanger and are discharged outdoors via the inner flue tube. The circulating
fan draws air from the room in which the heater is located and passes it over the heat exchanger where the air gains
heat by convection. The heated air is then circulated back into the room via the heater's front louvres. The gas supply
to the burner is controlled by an electronic controller (thermostat) which senses the room air temperature.
The following automatic safety controls are fitted to the heater:
•Filter Clean Warning Device - When the air filter is clogged or hot air outlet is blocked, the filter safety device will
switch off the heater and the filter light will flash.
•Flame Failure Device prevents flow of gas to burner if ignition fails or flame goes out.
•Power Failure Device prevents flow of gas to burner if there is a power failure.
•Overheat Safety Device – if the fan stops rotating for any reason the overheat switch shuts off the gas supply.
•Over Current Safety System.
•Air Volume and Combustion Control.
The heater has a humidifier tray located behind the lower front cover. The humidifier tray can be filled with water to
raise the humidity level in the room for extra comfort if required (refer to "Humidifier Tray Removal" on page 7).
HOW LONG WILL THE HEATER LAST?
The heater is supported by a manufacturer’s warranty(refer to “Warranty” on page 35). There are a number of factors
that will affect the length of service the heater will provide. These include but are not limited to the usage pattern and
the service and maintenance program.
REGULAR CARE AND SERVICING
The heater must be maintained and serviced in accordance with the Owner’s Guide and Installation Instructions.
Refer to “Regular Care” on page 7.
PRECAUTIONS
Heat from this appliance may over time affect the appearance of some flooring materials such as carpet, timber, vinyl
or cork. It is recommended that a protective mat is positioned in front of the heater that extends a minimum of 750 mm
from the front of the heaters louvres to protect floor coverings.
This heater can circulate large volumes of air. If the air in the room contains any cigarette smoke or cooking vapours
the circulated air may affect the appearance of carpets, furniture and drapes, etc.
4

SAFETY
For your safety do not operate the heater before reading this instruction booklet.
Warning: This heater is designed to be installed in a fixed position with a Paloma room sealed flue kit (supplied
separately). The heater must not be operated unless a genuine Paloma room sealed flue kit is installed.
Warning: The heater air intake hose and exhaust connection must both be connected to an approved Paloma
flue system as detailed in these installation instructions and the installation instructions supplied with the flue kit.
Warning: Ensure that the gas specified on the heater rating label matches the gas supply. Using a different gas
type may cause an explosion or cause damage to heater components. Automotive LPG fuel must not be used.
Warning: The heater uses 240 Volt AC electrical power for operation of the control systems. The removal of
cover(s) will expose 240 V wiring. Covers must only be removed by an authorised or qualified person.
Warning: This heater is only intended to be operated by persons who have the experience or the knowledge and
the capabilities to do so. This heater is not intended to be operated by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge.
Warning: Children should be supervised to ensure they do not interfere with the heater.
Warning: If the supplycord is damaged, it must be replaced by the manufacturer or its service agent or a similarly
qualified person in order to avoid a hazard.
The warranty can become void if internal components are tampered with or if the installation is not in
accordance with these instructions.
•DO ensure heater clearances are maintained at all times (refer to “Heater Clearances” table on page 13).
•DO turn the heater OFF at the control panel when unattended or not in use. Do not turn the heater off by
switching off at the power point. The power point may be turned off when the fans have stopped cycling.
•DO NOT allow curtains or other combustible materials to come into contact with the heater or encroach on
heater clearances. Tie curtains back if required.
•DO NOT use or store flammable or combustible materials near the heater. Flammable liquids (such as
petrol), newspapers and similar articles must be kept well away from the heater and the flue terminal.
•DO NOT store chemicals, household cleaners, etc., near the heater.
•DO NOT use or spray aerosols, stain removers and household chemicals in the vicinity of this heater or the
flue terminal whilst it is in operation. Gases from some aerosol sprays, stain removers and household chemicals
can become flammable or corrosive when drawn into a flame.
•DO NOT place articles on or against this appliance or the flue terminal. Ensure the flue terminal is not obstructed
in any way.
•DO NOT permit persons to sleep in the warm air discharge from the heater.
•DO NOT dry articles of clothing on the heater.
•DO NOT place containers of liquid on top of the heater. Spillage can damage the heater and may result in
electric shock.
•DO NOT sit on the heater.
•DO NOT allow children to insert items in the heater louvres.
•DO NOT operate heater with panels, covers or guards removed from the heater.
•DO NOT operate the heater without the air filter.
•DO NOT connect to an LPG gas cylinder located indoors.
•DO NOT use the heater if any part is faulty or damaged. Immediately call Rheem Service or Accredited service
Agent to arrange for an inspection.
•DO NOT use the heater if any part has been under water. Immediately call Rheem Service or an Accredited
service Agent to arrange for an inspection.
•DO NOT modify this appliance.
5

SAVE A SERVICE CALL
Check the items below before making a service call. You will be charged for attending to any condition or
fault that is not related to manufacture or failure of a part.
Note: The heater fans will continue operating for a few minutes after the heater is turned off. This is normal operation.
HEATER NOT OPERATING
•Is the electricity switched on?
Ensure the power point is turned on.
•Is there gas to the heater?
Try lighting another gas appliance. If there is no gas call your gas provider.
•Is the heater operating in a timer OFF period?
Check Timer 1 and Timer 2 settings to ensure they are suitable to enable heating when required (refer to “Timer
1 & Timer 2 Operation” on page 9). For commercial models connected to a central control system; ensure the
central command system is operating and that scheduled operating times are correct.
•Is the child lock on?
Ensure the child lock is not on (refer to “Child Lock Mode” on page 12).
•Is the filter light flashing?
If the filter light is flashing the filter requires cleaning (refer to “Regular Care” on page 7).
•Is a code displayed on the controller?
Check the controllers display to see if an error code is displayed. If an error code occurs the heater will 'lock out'
and will not operate until the fault has been rectified and the heater is reset. Refer to “Fault Indication” on page
29 for a detailed list of all available codes, their meanings, suggested remedies and heater reset procedure.
HEATER NOT SUFFICIENTLY HEATING ROOM
•Is the set temperature too low?
Increase the heaters’ set temperature (refer to “Raising or Lowering the Set Temperature” on page 9).
•Is the room in which the heater is installed too large?
Do you have the correct size heater for your room size? (Refer to “Heater Maximum Room Size” on page 14).
•Is the area subjected to drafts?
Ensure windows and doors are closed and that there are no large gaps on external doors or windows where cold
air can enter.
ROOM GETS TOO HOT
•Is the set temperature too high?
Decrease the heaters’ set temperature (refer to “Raising or Lowering the Set Temperature” on page 9).
HEATER PRODUCES SMOKE AND/OR ODOUR
Warning: If you smell gas do not operate the heater. Refer to “What to do if you smell gas” on page 8.
•When operated for the first time, the heater mayproduce smoke and/or odour. This is caused by oils used during
manufacture. When operating for the first time ensure the room is well ventilated by opening windows and doors
until the smoke and/or odour ceases. After first time use the heater should not produce smoke or odour and if
you continue to smell strange odours, shut down the heater immediately and phone your nearest Rheem
Service department or Accredited Service Agent to arrange for an inspection.
•The heater will produce a strong odour if the room has been recently painted or if the floors have been waxed or
polished. Ventilate room properly before use.
HEATER MAKES NOISES
•The heater will make noises during start up and shut down and the fan may be heard during operation and after
the heater stops. A slight hissing sound (gas flow) may also be evident during operation. Heating appliances
may also occasionally produce creaking or cracking noises which are caused by expansion and contraction of
metallic parts as they are heated or cooled. These noises are all normal noises.
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE, PHONE
YOUR NEAREST RHEEM SERVICE DEPARTMENT OR ACCREDITED SERVICE AGENT.
6

REGULAR CARE
Regular care should be performed by the householder as frequently as required, however the heater and power
supply cord should be visually checked for damage before every operation and the air filter should be checked on a
weekly basis.
Warning: If the heater has been operating, ensure it has sufficiently cooled before attempting any maintenance
procedure.
•Visually check heater and power supply cord for damage.
•Remove accumulated dust from heater with a vacuum cleaner.
•Wipe external parts with a soft dry cloth. Note: Do not use a cleaning cloth, thinners, benzene, acid or alkaline
detergents as these products will discolour the paint and plastic components.
•Remove and clean air filter (refer to “Air Filter Removal” on page 7). A vacuum cleaner can be used to remove
accumulated dust or if the air filter is very dirty it can be washed in luke warm water with a mild soap solution and
then allowed to dry. Note: Ensure the filter is dry before reinsertion otherwise the heater may not operate
correctly.
•Remove and clean humidifier tray (refer to "Humidifier Tray Removal" on page 7).
AIR FILTER REMOVAL
Warning: The heater must not be operated without the air filter. Turn
heater OFF before removing air filter.
To remove the air filter: The air filter is located on the top rear of the heater
and is removed by grasping the handle on top of the filter and lifting upwards.
To replace the air filter:Insert filter into slot on rear of heater and push fully
down into position.
HUMIDIFIER TRAY REMOVAL
Warning: Turn heater OFF before removing or replacing humidifier tray.
Warning: Do not overfill humidifier tray.
The humidifier tray is located on the bottom of the
heater and is accessed by removing the heaters front
lower cover.
To remove the humidifier tray: Simultaneously
depress tabs located on bottom of heater sides and pull
lower front cover away from heater. The humidifier tray
can then be removed by carefully sliding out from the
heater.
To replace the humidifier tray:Reinsert humidifier
tray into heater tray receptacle and slide fully into
position. The lower front cover can then be replaced by
depressing cover tabs whilst sliding the cover into
position. Note: The lower front cover is universal i.e. it
does not matter which way is up.
SERVICING
Warning: Servicing must only be performed by authorised personnel.
For peak performance it is suggested that the heater be serviced by your nearest Rheem Service Department or
Accredited Service Agent annually prior to every winter.
Only genuine replacement parts should be used on this heater.
Refer to “Service Procedures” on page 30.
7

OPERATION
HEATER OVERVIEW
CONTROL PANEL OVERVIEW
Note: 'Central Control' LED is present on PRS-250CN and PRS-250CL commercial models only. Commercial
models also have a remote Power LED and Filter LED located on the top of the heater (refer to "Central Control
Connection & Operation – Commercial Models Only" on page 20).
TO TURN THE HEATER ON
Warning: DO NOT OPERATE THE HEATER IF THE FLUE SYSTEM IS NOT CONNECTED OR IF ANY PART
OF THE FLUE SYSTEM IS FAULTYOR DAMAGED. Operation of the heater without the flue system or with faulty or
damaged flue components may cause combustion products to be discharged into the room in which the heater is
located resulting in serious injury or death. If you smell strange odours, shut down the heater immediately and phone
your nearest Rheem Service department or Accredited Service Agent to arrange for an inspection.
Warning: If you smell gas do not attempt to turn on the heater.
•Switch on the electrical supply at the power point. The heater will perform a self check routine.
•After the self check routine expires, the heater can be turned ON by pressing and releasing the heater ‘Power’
button. The LED on the power button will illuminate green and the digital display will indicate the set temperature
and room temperature.
The heater will operate automatically when a call for heat occurs (provided the heater is not operating in a timed OFF
period) and the LED on the power button will change from green to red once ignition has been successful. Note:
when first turned on the heater will operate in a pre warm cycle (burner on) for approximately 2 minutes regardless of
the set and room temperatures.
What to do if you smell gas?
•DO NOT try to light any gas appliance.
•DO NOT touch any electrical switch.
•TURN OFF the gas supply at the gas meter immediately, call your gas supplier or licensed gasfitter.
NOTE: Some gases are heavier than air and it may be necessary to check for gas leaks at floor level.
8

OPERATION
TO TURN THE HEATER OFF
•Turn the heater OFF by pressing and releasing the heater ‘Power’ button. The burner, digital display and all
LED’s will extinguish however the fan will continue to operate for a few minutes to cool down the heater and
prevent a build up of residual heat (fan run on). Note: The power supply should not be turned off during this cool
down period as this will prevent the fan from running on.
•The heater may be turned off at the power point when the heater fans stop operating.
RAISING OR LOWERING THE SET TEMPERATURE
The set temperature is the temperature setting the heater will heat the room to. When the heater is turned ON, the
heater will automatically operate the burner to heat the room to the desired set temperature. When the room reaches
the set temperature the heater will automatically turn the burner OFF.
To Raise the Set Temperature: Press and release the ▲ button once to raise the set temperature by 1ºC. Each
consecutive press and release of the ▲ button will raise the set temperature in increments of 1ºC up to a maximum of
26ºC. Note: After 26ºC a 'H' setting is available. The 'H' setting is for Service procedures only and should not be
selected. When setting the temperature to 'H' setting, the heater will monitor any abnormal high room air temperature
which is outside the normal temperature selection range. Should high room temperature be detected, the heater will
shut down and display error code 16 which will require the heater to be reset and the temperature setting changed to
a value from 16 ~ 26 (refer to “Fault Indication” on page 29).
To Lower the Set Temperature: Press and release the ▼ button once to lower the set temperature by 1ºC. Each
consecutive press and release of the ▼ button will lower the set temperature in increments of 1ºCdown to a minimum
of 16ºC. Note: before 16ºC an 'L' setting is available. The 'L' setting is for Servicing procedures and should not be
selected. If set on 'L' the heaters burner will not turn on at room temperatures above 10°C.
SETTING THE TIME
The heater will operate without the time being set however timer function(s) will not operate. Set or change the time
as follows:
1. Press and release the ‘Set Times’ button once. --:-- (or a previously entered time) will appear on the digital
display and the 'Clock' LED and ‘AM or PM’ will illuminate green.
2. Press and hold down the ▲ or ▼ button. The display will change in 1 minute increments until the next hour is
reached at which time the display will then change in 1 hour increments until the button is released. When the
button is released the ▲ or ▼ button can then be pressed and released to fine tune the time in 1 minute
increments.
3. When the correct time has been entered, press and release the ‘Set Times’ button 5 times to accept the setting.
The time will be saved and the display will revert to show the current set and room temperatures.
TIMER 1 & TIMER 2 OPERATION
Two on/off timers are available (Timer 1 & Timer 2) and each timer can be programmed to automatically turn the
heater ON and OFF. For a timer to operate, the actual time must be set, the timers ON and OFF times must be
programmed, the heaters ‘Power’ button must be turned on and the timer must be turned on (selected).
Note: PRS series room heaters have a pre-heat function that operates the burner up to one hour prior to the
programmed starting time of a timer to warm the room SO THAT THE ROOM REACHES THE REQUIRED
TEMPERATURE WHEN THE PROGRAMMED ON TIME IS REACHED. This pre-heat function is automatic and
will always occur when the heater is turned on and a timer has been programmed and selected.
Programming Timer 1 and/or Timer 2 operating Times
1. Press and release the ‘Set Times’ button twice to enter timer programmingmode. The ‘Timer 1’ LED and ‘Timer
1 On’ LED will illuminate and the timer 1 ‘on time’ will be shown on the digital display.
2. To program Timer 1 ‘on time’, press and hold down the ▲ or ▼ button. The display will change in 1 minute
increments until the next hour is reached at which time the display willthen change in 1 hour increments until the
button is released. When the button is released the ▲ or ▼ button can then be pressed and released to fine tune
the time in 1 minute increments.
3. Press and release the ‘Set Times’ button once. The ‘Timer 1 Off’ LED will illuminate and the Timer 1 ‘off time’ will
be shown on the digital display. The Timer 1 ‘off time’ can now be programmed by operating the ▲ and ▼ arrow
buttons as previously explained in step 2.
4. Press and release the ‘Set Times’ button once. The ‘Timer 2’ LED and ‘Timer 2 On’ LED will illuminate and the
Timer 2 ‘on time’ will be shownon the digital display. The Timer 2 ‘on time’ can now be programmed by operating
the ▲ and ▼ arrow buttons as previously explained in step 2.
9

OPERATION
5. Press and release the ‘Set Times’ button once. The ‘Timer 2 Off’ LED will illuminate and the Timer 2 ‘off time’ will
be shown on the digital display. The Timer 2 ‘off time’ can now be programmed by operating the ▲ and ▼ arrow
buttons as previously explained in step 2.
6. Press and release the ‘Set Times’ button once. This exits the Timer programming mode and the digital display
will revert to show the current set point and room temperatures.
It should be noted that timer times are not required to be programmed and the timer programming mode can be
exited at any stage by pressing and releasing the ‘Set Times’ button repeatedly until all timer On and Off LED’s are
extinguished. Also refer to 'Timer Programming Example' on page 10.
Turning Timer(s) ON (selecting a timer)
Before operating a timer ensure the relevant timer operating (ON & OFF) times have been programmed and that the
heater is turned on by pressing and releasing the ‘Power’ button. The set point temperature should be adjusted to the
required temperature and a check should be made to ensure there are no objects in front of the louver to block the air
outlet.
To turn a timer on, press and release the relevant timer button(s) (Timer 1 and/or Timer 2 can be selected). The
selected timer button LED will illuminate. Note: If the burner is operating the burner will turn off when a timer is turned
on unless the current time is within the programmed on time period (including pre-heat period) in which case the
burner will continue to operate.
Up to one hour prior to the timers programmed ON time the burner will automatically turn on (pre-heat function); the
timer button LED will flash and the Power button LED will change from green to red upon successful ignition.
When the timers programmed OFF time is reached, the burner will turn off and the timer button LED will stop flashing
but remain on solid (as the timer is still selected). The Power button will revert from red to green when the burner is
extinguished.
Notes:
•A timer cannot be selected unless it’s ON and OFF times have been correctly programmed.
•Although both timers can be selected, a second timer cannot be selected if it’s programmed ON time is within the
same programmed time period as the first timer.
Timer Programming Example
The following example details how to set the timer's to automatically operate the heater for a period during the
morning and another period during the evening:
Timer 1 ON at 6:00am (heater start at 5:00am to heat the room for 6:00am) and OFF at 9:00am.
Timer 2 ON at 5:00pm (heater start at 4:00pm to heat the room for 5:00pm) and OFF at 10:00pm.
1. Press and release the ‘Set Times’ button twice to enter timer programming mode.
2. Use the ▲ or ▼ buttons to adjust Timer 1 (morning) ON time to AM 6:00.
3. Press and release the ‘Set Times’ button once.
4. Use the ▲ or ▼ buttons to adjust Timer 1 (morning) OFF time to AM 9:00.
5. Press and release the ‘Set Times’ button once.
6. Use the ▲ or ▼ buttons to adjust Timer 2 (evening) ON time to PM 5:00.
7. Press and release the ‘Set Times’ button once.
8. Use the ▲ or ▼ buttons to adjust Timer 2 (evening) OFF time to PM 10:00.
9. Press and release the ‘Set Times’ button once to exit timer programming mode.
10. Use the ▲ or ▼ buttons to adjust the set temperature to the desired setting.
11. Press and release the ‘Power’ button to turn the heater on.
12. Press and release 'Timer 1' button to turn ON Timer 1.
13. Press and release 'Timer 2' button to turn ON Timer 2.
14. Ensure there are no objects in front of the louver to block the air outlet.
10

OPERATION
Turning Timer(s) OFF (deselecting a timer)
To deselect a timer, press and release the selected timer button (‘Timer 1’ or ‘Timer 2’ button). The relevant timer
button LED will extinguish and the burner will turn on (because the Power button is turned ON). Note: If a second
timer was also selected and the current time was outside the timers programmed on period and pre-heat time, the
burner would not operate when the first timer is deselected.
Timer Over-Ride Function
The ‘Over ride’ button can be operated to turn the burner off when the heater is operating in a timer on period or to
turn the burner on when the heater is operating in a timer off period.
•If a timer is selected and the heater is operating within a timer programmed time period or pre-heat period
(burner on), the timer may be over-ridden and the burner turned off by pressing and releasing the ‘Over ride’
button. The Over ride button LED will illuminate and flash and the Power button LED will change from red to
green after the burner is extinguished.
If the ‘Over ride’ button is pressed and released once again, the Over ride button LED will extinguish and the
burner will operate provided the current time is within the selected timers programmed on period including
pre-heat period and provided the set temperature is higher than the room temperature.
•If a timer is selected and the heater is operating outside a timer programmed time period (burner off), the timer
may be over-ridden and the burner turned on by pressing and releasing the ‘Over ride’ button. The Over ride
button LED will illuminate and flash, the timer button LED will remain on and the burner will operate provided the
set temperature is higher than the room temperature.
If the ‘Over ride’ button is pressed and released once again, the Over ride button LED will extinguish and the
burner will turn off provided the current time is not within the selected timers programmed on period including
pre-heat period.
AUTO OFF TIMER OPERATION
The Auto Off Timer can be activated so that the heater will automatically turn OFF after a preset time period.
1. Press and release the ‘Power’ button to turn the heater on.
2. Press and release the ‘Auto Off Timer’ button. 1h (1 hour) will be shown of the display and the Auto Off Timer
button LED will illuminate.
3. Each consecutive press and release of the ‘Auto Off Timer’ button will change the OFF time setting up to a
maximum of 12h (12 hours).
After a 5 second delay the display will start counting down in hours and minutes and the Auto Off Timer button LED
will flash. When the counter reaches zero the heater will automatically turn OFF and all LED's will extinguish.
Notes:
•Possible time settings are 1h, 2h, 3h, 4h, 5h, 6h, 7h, 8h, 10h & 12h.
•The set temperature must be higher than the room temperature for the burner to operate. Note: When first
turned ON the burner will operate for a period of approximately three minutes regardless of the room and set
temperatures.
ECONOMY MODE
Economy mode is designed to increase the efficiency of the heater.
To activate economy mode: Press and release the ‘Economy’ button. The LED on the economy button will
illuminate green and the heater will operate as follows:
a) If the room temperature reaches the set temperature the economy program is activated and the set temperature
is automatically reduced by 1°C after a delay of 30 minutes.
b) The set temperature is automatically reduced by another 1ºC after another 30 minute delay.
This subtle reduction in temperature is not noticed by the user and the set temp is not altered on the display however
the efficiency of the heater is increased.
To deactivate economy mode: Press and release the ‘Economy’ button. The LED on the economy button will
extinguish, the heater will exit economy mode and the set temperature will return to the displayed set temperature
value.
11

OPERATION
CHILD LOCK MODE
A child lock mode is available to prevent children interfering with and/or inadvertent operation of the heater controls.
To activate child lock mode: Press and hold down the ▲ and ▼ buttons simultaneously for three seconds then
release both buttons. The child lock LED will illuminate green to indicate that the heater is in child lock mode.
To deactivate child lock mode: Press and hold down the ▲ and ▼ buttons simultaneously for three seconds then
release both buttons. The child lock LED will extinguish to indicate that the heater is no longer in child lock mode.
Note: If the burner is operating and child lock mode is activated, the ‘Power’ button can still be pressed and released
to turn the heater OFF only.
FILTER LIGHT
The filter light will illuminate and flash if the filter is blocked and requires cleaning (refer to “Regular Care” on page 7).
HUMIDIFIER TRAY
The heater has a humidifier tray located behind the lower front cover. The humidifier tray can be filled with water to
raise the humidity level in the room for extra comfort if required (refer to "Humidifier Tray Removal" on page 7).
VERTICAL LOUVRE ADJUSTMENT
The vertical louvers on the heaters front louvre can be adjusted to direct air flow in the required direction by pushing
the vertical section to the left or the right. Note: The horizontal louvres are fixed and cannot be adjusted.
SAFETY DEVICES
Various automatic safetydevices are fitted to the heater to provide safe operation. For more information refer to 'How
Your Heater Works' on page 4.
CENTRAL CONTROL – COMMERCIAL MODELS ONLY
PRS-250CN and PRS-250CL commercial models can be controlled by an external central control system, such as a
time clock or BMS, which can be programmed to turn the heater (or group of heaters) ON or OFF at scheduled times.
For information on using a central control system refer to "Central Control Connection & Operation – Commercial
Models Only" on page 20.
12

INSTALLATION
INSTALLATION STANDARDS
The heater must be installed:
•by a qualified person, and
•in accordance with the installation instructions supplied with the heater and the installation instructions supplied
with the flue kit, and
•in compliance with Standards AS/NZS 3000, AS/NZS 5601.1, as applicable under local regulations, and all local
codes and regulatory authority requirements.
•In New Zealand the installation must also conform with NZS 5261, as applicable under local regulations, and the
New Zealand Building Code.
PACKAGING
Tape is utilised to hold some components (such as the air filter) in place during transport. All packaging materials
including any tape must be removed from the heater prior to its installation.
HEATER APPLICATION
This room sealed gas space heater is designed for use in a single family domestic dwelling (or commercial premises
for PRS-250CN and PRS-250CL commercial models) for the purpose of room heating. Its use in an application other
than this may shorten its life and void the product warranty.
READ THESE INSTRUCTIONS IN FULL
INSPECTION OF EQUIPMENT
Check the heater and associated equipment for any damage. DO NOT INSTALL OR OPERATE ANY HEATER
THAT HAS BEEN DAMAGED. ANY ADDITIONAL DAMAGE OR FAULTS CAUSED BY UNAUTHORISED START
UP MAY NOT BE COVERED BY WARRANTY.
Warning: This heater is designed to be installed in a fixed position with a room sealed flue kit (supplied
separately). THE HEATER MUST NOT BE OPERATED UNLESS A GENUINE PALOMA ROOM SEALED FLUE
KIT IS INSTALLED. For installation of the flue kit refer to the installation instructions supplied with the flue kit.
Warning: Ensure that the gas specified on the heater rating label matches the gas supply. Using a different gas
type may cause an explosion or cause damage to heater components. Propane / Butane mixtures such as
automotive LPG fuel must not be used.
RATING LABEL
The rating label details the model number, serial number, gas type, burner pressure and electrical specifications of
the heater. The rating label is located on the right hand side of the space heater.
HEATER LOCATION & CLEARANCES
This heater is suitable for indoor installation only. The position of the heater should be chosen with safety and service
in mind. Make sure people (particularly children) will not touch the flue outlet. Rheem recommends that a flue terminal
guard (kit PFK5300) is installed if the flue outlet is in an accessible position or if children are present. The flue terminal
must be clear of obstructions and shrubbery.
Heater clearances must be observed at all times.
Heater Clearances
Front
Left Side
Right Side
Top
1000 mm
500 mm
500 mm
250 mm
The heater must be installed so that it is level and stable. The four feet on the bottom of the heater are height
adjustable (by rotating in a clockwise or anticlockwise direction) to facilitate levelling and stabilisation of the heater
when installed on an uneven or sloping surface.
The heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or where aerosol
propellants are released. Remember the air may be safe to breathe, but when it goes through a flame, chemical
changes take place which may attack the heater.
The heater must be accessible without the use of a ladder or scaffold.
13

INSTALLATION
The following points must also be observed:
•DO NOT install this heater in areas where spray painting occurs or in areas where there may be lots of fluff, dust
or airborne particles such as in hairdressers, workshops etc.
•DO NOT install on an uneven surface unless the heater can be levelled by adjusting the heaters height
adjustable feet.
•DO NOT install under shelves or in a confined space. Note: This heater is not suitable as a fireplace insert and
must not be built into walls, cupboards bookcases etc.
•DO NOT install where the heater may receive splashing water or near another heat source.
•DO NOT connect to an LPG gas cylinder located indoors.
•DO NOT connect the heater to double adapters or power boards. The heater must be directly connected to a
240 Volt 10 Amp GPO.
•DO NOT install under a power point.
Also refer to the installation instructions supplied with the flue kit for important information on flue location.
MINIMUM & MAXIMUM ROOM SIZES
PRS Series Room Sealed Gas Space Heaters do not have a minimum room size requirement because they are room
sealed heaters that discharge combustion products to an external position via the flue system.
PRS Series Room Sealed Gas Space Heaters should not to be installed in a room larger than the specified maximum
room size. Although the heater can be installed in a room larger than the specified maximum room size the maximum
heating capacity of the heater will be exceeded and the heater maynot be able to reach or be able to maintain the set
temperature.
Specified Maximum Room Size by Heater Model (room length X width)
(1)
Very Cold Cold Cool Mild
PRS-150N/L 30 m
2
35 m
2
48 m
2
54 m
2
PRS-250N/L 52 m
2
61 m
2
82 m
2
94 m
2
PRS250CN/L 52 m
2
61 m
2
82 m
2
94 m
2
(1) Based on a maximum ceiling height of 2.7 metres (guide only).
HEATER INSTALLATION PROCEDURE
1. Determine heater and flue location (refer to “Heater Location” on page 13 and “Flue Location” on page 16).
2. Install flue kit (refer to the installation instructions supplied with the flue kit). Note: During this step the flue
penetration holes will be cut and the back cover kit mounting brackets fixed to the wall.
3. Connect heater exhaust (refer to “Connecting Heater Exhaust” on page 21).
4. Connect heater air intake (refer to “Connecting Heater Air intake” on page 22).
5. Connect heater gas connection (refer to “Gas Connection” on page 18).
6. Connect heater electrical connection (refer to “Electrical Connection” on page 19).
7. Install heater back cover kit (refer to “Heater Back Cover Kit Installation” on page 23).
8. Commission heater (refer to “Commissioning” on page 25).
14

FLUEING
THE HEATER MUST NOT BE OPERATED UNLESS A GENUINE PALOMA ROOM SEALED FLUE KIT IS
INSTALLED. The following information is provided here as a guide only; for installation of the flue kit refer to the
installation instructions supplied with the flue kit.
The diagram below illustrates the type of flue kit configurations that are available.
15

FLUEING
FLUE LOCATION
The location of the flue terminal must comply with the requirements of AS/NZS 5601.1 Clause 6.9 and figure 6.2
which are summarised in the “Installation Standards & Requirements” section on page 16.
The following warnings also apply to the location of the flue system:
Warning: DO NOT flue into another room and do not flue into an external garage or shed.
Warning: DO NOT flue into a natural draught flue, chimney or fireplace.
Warning: DO NOT position the flue terminal near flammable materials.
Warning: Any horizontal flue terminal installed in areas subject to snow must terminate a minimum of 1.5 metres
above ground level or any structure that may accumulate snow to prevent the flue terminal from becoming blocked.
This heater does not require additional ventilation when correctly installed with a Paloma room sealed flue kit.
INSTALLATION STANDARDS & REQUIREMENTS
The flue kit must be installed:
•by a qualified person, and
•in accordance with these installation instructions and the in installation instructions supplied with the room
sealed gas space heater, and
•in compliance with Standards AS/NZS 3000, AS/NZS 5601.1, as applicable under local regulations, and all local
codes and regulatory authority requirements.
•In New Zealand the installation must also conform with NZS 5261, as applicable under local regulations, and the
New Zealand Building Code.
This heater is a fan assisted heater; therefore the fan assisted flue dimension clearances detailed in AS/NZS 5601.1
must be used.
The location of the flue terminal must comply with the requirements of AS/NZS 5601.1 Clause 6.9 and figure 6.2
which are summarised here as a guide only. It is the installers’ responsibility to ensure that the current version of the
relevant standard is used.
AS/NZS 5601.1 CLAUSE 6.9 AND FIGURE 6.2 SUMMARY
AS/NZS 5601.1 clause 6.9.1 states that the termination point of an open flue shall be located in relation to any
associated building and to neighbouring structures so that wind from any direction is not likely to create a
downdraught in the flue or chimney and that except where clause 6.9.3 applies, a flue terminal shall;
(a) be at least 1 m horizontally from a neighbouring structure; or
(b) if less than 1 m horizontally from a neighbouring structure, be at least 500 mm above that structure;
(c) be at least 1.5 m from any opening into a building; and
(d) be at least 200 mm from another flue terminal.
AS/NZS 5601.1 clause 6.9.2 states that where a flue is to terminate above a roof;
(a) The end of the flue shall be at least 500 mm from the nearest part of the roof.
(b) If the roof is designed for personal or public use, the end of the flue shall be at least 2 m above the roof level and
500 mm above any surrounding parapet and be supported.
(c) The end of the flue shall be at least 200 mm from the nearest part of any chimney.
NOTES: Distances stated are measured before the cowl is fitted to the end of the flue.
AS/NZS 5601.1 clause 6.9.3 states that the location of the flue terminal of a fan assisted flue appliance must comply
with the requirements clause 6.9 and figure 6.2 which is reproduced on the following page as a guide only.
16

FLUEING
AS/NZS 5601.1 Figure 6.2 flue terminal location guide.
All dimensions are measured to the nearest part of the flue terminal.
Ref Item
Minimum Clearances (mm)
Natural Draught
Fan Assisted
a
Below eaves, balconies and other projections:
•Appliances up to 50 MJ/h input
300
200
•Appliances over 50 MJ/h input
500
300
b
From the ground, above a balcony or other surface *
300
300
c
From a return wall or external corner * (refer to note 2)
500
300
d
From a gas meter (M)
1000
1000
e
From an electricity meter or fuse box (P) (refer to note 1)
500
500
f
From a drain pipe or soil pipe
150
75
g
Horizontally from any building structure * or obstruction facing a terminal
500
500
h
From any other flue terminal, cowl, or combustion air intake *
500
300
j
Horizontally from an openable window, door, non-mechanical air inlet or
any other opening into a building with the exception of sub-floor ventilation
(refer to note 2):
•Appliances up to 150MJ/h input *
500
300
•Appliances over 150MJ/h input up to 200 MJ/h input *
1500
300
•Appliances over 200MJ/h input up to 250 MJ/h input *
1500
500
•Appliances over 250 MJ/h input *
1500
1500
All fan assisted flue appliances, in the direction of discharge
-
1500
k
From a mechanical air inlet, including a spa blower (refer to note 2)
1500
1000
n
Vertically below an openable window, non-mechanical air inlet or any other
opening into a building with the exception of sub floor ventilation:
•Space heaters up to 50MJ/h input
150
150
•Other appliances up to 50 MJ/h input
500
500
•Appliances over 50MJ/h input and up to 150 MJ/h input
1000
1000
•Appliances over 150MJ/h input
1500
1500
* Unless appliance is certified for closer installation.
Notes:
1. Prohibited area below electricity meter or fuse box extends to ground level.
2. Where dimensions c, j or k cannot be achieved, an equivalent horizontal distance measured diagonally from the
nearest discharge point of the terminal to the opening may be deemed by the Technical Regulator to comply.
3. Refer to AS/NZS 5601.1 clause 6.9.4 for restrictions on a flue terminal installed under a covered area.
4. Refer to AS/NZS 5601.1 figure J3 for clearances required from a flue terminal to an LP gas cylinder. A flue
terminal is considered a source of ignition.
5. For appliances not addressed above, acceptance should be obtained from the Technical Regulator.
17

GAS CONNECTION
All gas work must be carried out by a qualified person and in accordance with the Australian Gas Installations
Standard AS 5601 or AS/NZS 5601.1, and local authority requirements.
CONNECTION SIZES
Model
PRS-150
PRS-250 & PRS250C
Gas Connection Size
R½/15
R½/15
GAS INLET
The pipe work must be cleared of foreign matter before connection and
purged at the heater gas isolator before attempting to light the heater. If this
procedure is not performed, an ignition failure (code 11) may result on initial
start up.
An isolation valve and disconnection union must beinstalled to allow servicing
and removal of the heater. Refer to AS/NZS 5601 or AS/NZS 5601.1 for the
correct pipe sizing.
Warning:Before pressure testing the gas supply system always isolate
and disconnect the heater after the isolating valve to prevent the risk of
serious damage to the heater. Warranty does not cover damage of any nature
resulting from failure to observe this precaution. Refer to the heaters rating
label for gas types and pressures.
The heater gas connection must be leak tested before operating the heater.
Test the heater gas connection for leaks using soapy water. DO NOT USE A
NAKED FLAME.
18

ELECTRICAL CONNECTION
The electrical installation must comply with AS/NZS 3000, AS/NZS 5601 or AS/NZS 5601.1 and any local
requirements.
This heater is equipped with a 10A 3 pin plug socket which requires a 10 amp general purpose outlet (GPO) that is
connected to a 240V AC 50 Hz M.E.N. (multiple earthed neutral) mains power supply.
The GPO should be located in an accessible position beside the heater.
•The GPO must be located within 1200 mm from the left hand side of the heater or 1600 mm from the right hand
side of the heater to facilitate cord connection without the use of an extension cable.
•DO NOT connect the heater to double adapters or power boards.
•DO NOT install the heater under a power point.
WIRING DIAGRAM
19

ELECTRICAL CONNECTION
CENTRAL CONTROL CONNECTION & OPERATION – COMMERCIAL MODELS ONLY
PRS-250CN and PRS-250CL commercial
models can be controlled by an external
central control system, such as a time clock or
BMS, which can be programmed to turn the
heater (or group of heater's) ON or OFF at
scheduled times.
The heater will operate in central control mode
when a 24 VAC command signal is received
from the time clock or BMS
A terminal block is located on the rear of the
heater to facilitate this connection as depicted
opposite.
When the 24 VAC central control signal is present, the heater will operate in central control mode and the following
will occur:
•The 'Central Control LED' on the control panel will illuminate (refer to "Control Panel Overview" diagram on page
8 for LED location).
•If the control panel cover is locked to prevent control panel operation: The heater will automatically turn ON and
operate according to the heaters current set temperature provided the heater is turned on at the power point and
the heater's Power button is on.
•If the control panel cover is unlocked: The heater will automatically turn ON and operate according to the heaters
current set temperature provided the heater is turned on at the power point and the heater's Power button is on.
All functions except set temperature adjustment (▼ and ▲ buttons), Economy button and on/off operation
(Power button) will be disabled. Note: If a disabled button is pressed whilst the heater is in central control mode,
the 'Central Control LED' will flash.
When not operating in central control mode, the heater can be operated as normal provided access can be gained to
the control panel i.e. the control panel is unlocked.
Notes:
•The 24 VAC power supply must be supplied from an isolated power supply or isolation type transformer.
•Minimum command signal wire size for system cable lengths up to 100 metres is 1.5 mm2. Command signal
wiring for groups of heaters or for system cable lengths greater than 100 metres must be sized to allow for a
maximum 12% voltage drop and in any case must be not smaller than 1.5 mm2.
•External time clock, BMS and external central control wiring is not supplied with the heater and is to be supplied
and installed by the installing contractor.
•Commercial models have a
remote Power LED and Filter
LED located on the top of the
heater to facilitate viewing of
these indicators whist the
control panel key lockable
cover is closed/locked.
Controlling a Group of Heaters
The central control system can control a group of two or more heaters by connecting the 24 VAC command signal
wiring in parallel with each heater as depicted below. There is no limit to the number of heaters that can be
connected/controlled in this manner provided the central control system can meet load requirements (5 mA per
heater @ 24 VAC ±25%).
20