Rinnai Pure Control Instruction Manual

1
Installaon & User
Manual
Pure Control
Auto Pasteurisaon Unit
Important.
Read these instrucons carefully before aempng installaon or use of this
appliance. All work must be carried out by competent persons.

2
CONTENTS
Crical Informaon And Warnings Page 3
Funconality of The Pure Page 4
Components Page 5
System Schemac Page 6
Installaon Instrucons Page 7 - 10
Programing Instrucons Page 11 - 16
Contents

3
IT IS IMPORTANT THAT THIS SYSTEM IS NOT USED IF THERE IS THE
POSSIBILITY THAT THE BUILDING IS OCCUPIED DURING THE
PASTEURISATION PERIOD.
RINNAI RECOMMEND THAT WARNING NOTICES STATING THE
WATER FROM THE TAPS COULD BE HOT.
THESE INSTRUCTIONS MUST BE FULLY READ, UNDERSTOOD AND FULLY
COMPLIED WITH. FAILURE TO DO SO COULD LEAD TO PROPERTY
DAMAGE AND OR SERIOUS PERSONAL INJURY.
THE FITTING OF THIS APPLIANCE DOES NOT EXEMPT THE PROPERTY
OWNER OR LANDLORD FROM NOT FOLLOWING THE DUTY OF CARE AS
SPECIFIED WITHIN HEALTH AND SAFETY EXECUTIVE ACOP L8 CONTROL
OF LEGIONELLA BACTERIA IN WATER SYSTEMS
THIS UNIT SHOULD ONLY BE INSTALLED BY A QUALIFIED PERSON.
THE USE OF THIS UNIT FOR ANY PURPOSE OTHER THAN FOR WHAT IT IS
DESIGNED FOR, WILL NEGATE ANY WARRANTY.
RINNAI ACCEPT NO LIABILITY FOR ANY THIRD PARTY CLAIM THROUGH
FAILURE TO FOLLOW THESE INSTRUCTIONS IMPLICITLY.
Crical Informaon And Warnings

4
FUNCTIONALITY OF THE PURE
This System and Instrucons must be used and applied in conjuncon
with Health and Safety Execuve ACOP L8 The Control of Legionella
Bacteria as well as any Local by-Laws
The Rinnai PURE system is designed to allow a domesc hot water system ed
with a secondary return system to operate during the buildings occupancy at a safe
temperature whilst also allowing the temperature to be raised during periods of
un-occupancy to reduce the growth of legionella bacteria.
The Pure Controller works in conjuncon with the MC91 controller and the
temperature seng of the dipswches on the water heater. The secondary return
pump is wired through the Pure to allow it to turn the pump on and o.
The Pure has 4 dierent schedule sengs that can be programmed in to it which
can be set over 7 days and it also has a cool down period which can be set from 15
minutes to 300 minutes. The 4 dierent sengs are as follows
Occupancy On—Building Occupied
Occupancy O– Building Unoccupied
Pasteurisaon On– Pasteurisaon Starts
Pasteurisaon O—Pasteurisaon Finished.
The cool down period does not let you programme an occupied seng unl aer
the desired duraon that is set.
The Pure also ulises and Temperature sensor which is to be ed directly on to
the return pipework or the inlet leg to the water heater. This temperature can be
altered when the building is occupied and when it reaches its set pump will turn the
secondary pump o.
NOTE IT IS THE INSTALLERS RESPONSIBILITY TO ENSURE THAT THE
SYSTEM HAS BEEN REDUCED TO A SAFE TEMPERATURE PRIOR to THE
RE-OCCUPANCY, FAILURE TO DO SO COULD LEAD TO PERSONEL INJURY.
Funconality of The Pure

5
OPERATIONAL COMPONENTS
Components
Pure Controller
Temperature Sensor
MC91 Controller — Sold Separately

6
OPERATIONAL COMPONENTS
System Schemac

7
OPERATIONAL COMPONENTS
Installaon Instrucons
Specicaon:
Power Supply: 240V AC
Temperature Sensor: Rinnai Custom
Communicaons: BACnet MS/TP
Relay Rang: 5amp Max @ 240V
Housing Dimensions 180mm (h) x 182mm (w) x 63mm (d)

8
OPERATIONAL COMPONENTS
Installaon Instrucons
The following items are required for the installaon but are not supplied by Rinnai UK. These
items are common and can be obtained through any merchants or hardware store.
 3 Core Flex 1.5mm 5amp rated (length to be determined by installer)
 Fixing screws and wall plugs to mount Pure Controller
FIG 2
FIG 1
 Remove front panel of Pure Controller
 With a at head screwdriver pull down the catch
circled in FIG 1 and remove the controller body
 Locate the knock out holes on the controller
housing (FIG 2) and proceed to make holes for
xing screws
 Place the controller in desired locaon near to
the heater(s) and mark out the holes to drill.
Drill the holes and x the housing to the wall
using appropriate xings (Fixings not supplied)

9
OPERATIONAL COMPONENTS
Installaon Instrucons

10
OPERATIONAL COMPONENTS
Installaon Instrucons
 Wire the temperature sensor using Belden 9841 (0.2mm2) Twisted Pair with Drain wire and foil wrap or equiva-
lent. Must Be suitable for RS485 Standard. Connect to the Temperature senor connections.
 Fit the Sensor to either the return pipework before it connects on to the mains in or if this is too far then it can be
fitted on to the cold supply in to the heater. Please note that this sensor must be in direct contact with the pipe
and not fitted on top of lagging.
 Wire the Rinnai MC91 through Relay 1. The controller should be connected to C and NC on the controller. You
can now connect the controller on to the Rinnai water heater. (These two connections are not polarity conscious)
 Wire the live for the Secondary Return/Recirculation Pump through points C and NO on Relay 2.
 Wire in the 240v Mains supply
Operation Sequence
Controller Pump
Occ - C-NC - ON C-NO - ON
UnOcc - C-NC - ON C-NC - OFF
PasOn - C-NO - OFF C-NO - ON
PasOff - C-NC - ON C-NC - OFF
Please note that during the pasteurisation cycle the system must be run for a minimum of one hour ONLY when the
system reaches temperature. The time programmes MUST be calculated or tested before the system can be used.
You can programme another Occ to allow the system temperature to drop by using the system heat loss. The water will
simply pass through the Rinnai without firing it up as the water will be above the set temperature on the controller. The
Rinnai controller must be set at the desired temperature for a 24 hour period to allow this to be saved in to the PCB.