Certikin MB35S, Operating, Installation And Servicing Instructions

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WARNING : BEFORE COMMENCING OR COMPLETING ANY ELECTRICAL WORK ON THE APPLIANCE, IT
IS RECOMMENDED THAT THE BASIC SAFETY CHECKS FOR EARTH CONTINUITY, SHORT CIRCUIT, PO-
LARITY AND RESISTANCE TO EARTH ARE MADE. ALL WORK CARRIED OUT SHOULD FOLLOW GUIDE-
LINES LAID DOWN BY THE I.E.E.
Operation
The Heater requires Mains on both the Live (L) and Switched Live (SL) connection to be able to run. It is
delivered with a link between them which can be removed if a separate Heater switched live is going to be used.
To run, the Heater must have a Mains supply, Gas, Pool Pump pressure sufficient to activate the Pressure
Switch, all safety switches closed and a pool temperature below the set point.
If all the above are correct then the Gas Ignition Control starts the Ignition sequence:
1. The Fan and internal Pump runs as a pre-purge of the Heat Exchanger
2. After a few seconds a spark is created at the electrode and the burner is lit.
3. The burner flame is sensed and the spark is removed.
4. The Fan speed is then changed to the required speed according to the modulation curve.
5. If it fails to light the burner the spark will stop and the Fan and internal Pump will run on as a post-purge of
the Heat Exchanger.
6. The ignition sequence will be repeated up to five times, then the control will lockout and will require
a reset to start again.
Safety Controls & Lockouts
The Pool Thermostat Control indicates the actual and set temperature of the pool and also displays all the
lockouts. The next pages detail the fault conditions, the indicators, the display and the actions required.
User Setup Mode
Turn off on the Panel Switch. Turn on with the Panel Switch whilst pressing the Lock/Reset Button.
The Control is now in User Setup Mode. See Page 16 for details.
Service Mode
This is a special mode used to set the operation of the Control and to investigate fault conditions, it is entered
from User Setup Mode.
Rotate Pool Thermostat knob fully clockwise to show the software version number.
Press the Lock/Reset Button for 3 seconds. The control is now in Service Mode.
It is now possible to change some of the Control’s parameters. To show them, rotate the Pool Thermostat
Potentiometer. To zero or change them, press the Reset/Lock button
To exit, turn the Panel Switch off then back on again.
Condensing Pool Heater
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27/02/09
Test Temperature Display Mode 1 (td1).
Temperatures are displayed to 0.1 degree resolution, not the normal 1 degree.
The display will now show each sensor temperature and cycle around them for each press of the Lock/Reset button.
1. Pool Temperature as normally displayed. The Green LED will be alight.
2. Pool Temperature is dispayed to 0.1 degrees. The Green LED will be alight.
3. Heat Exchanger Flow Temperature. The Yellow LED will flash rapidly.
4. Heat Exchanger Combustion Temperature. The Red LED will flash rapidly.
Rotating the potentiometer will change the set temperature. Pressing and holding the button whilst one of the
temperatures is displayed will ‘lock/unlock’ it on the display for continuous observation.
FAULT FINDING
Service Mode Setting Factory Setting Reset press Display Indicator
1 Pressure Log Number of Operations Resets to zero Yellow LED ON
2 Unused Red LED ON
3 Combustion Gas Log Number of Operations Resets to zero OH2, Red LED flashing
4 Gas Lockout Log Number of Operations Resets to zero GAS, Red & Yellow LED ON
5 Condensate Blocked Log Number of Operations Resets to zero HI, Front Red PCB LED ON
6 Unused Rear Red PCB LED ON
7 Hours run 0 Press resets to zero
156 =1560 hrs both PCB LEDs on
8 Display td0 td1 td0 / td1