Final Checks; User Handover; Frost Protection; Anti-Legionella - Potterton iHE 100/300 Installation And Servicing Instructions

6. Remove the fl ue sample point plug in the
fl ue outlet elbow and push the probe of a
combustion analyser fully in.
7. Request a DHW demand by pressing the
DHW button on the appliance controls (top left
button).
8. Using software, Select device 1 and open
"Service / Special operation" (Select devices
2 & 3 as you begin to commission further heat
engines).
9. Using software, select line 7145 "Controller
stop set point" and set it to 100%
10. Using software, select line 7143 "Controller
stop function" and set to "on". The heat engine
will now run at 100% loading.
11. Once the heat engine has ignited a "fl ame"
symbol should be visible on the user display
and / or a fl ame should be visible through the
heat engine sight window.
12. Allow fi ve minutes for the Heat engine to warm
up before checking the combustion.
13. The CO fi gure should be within the range
2
9.1% to 9.3%. If adjustment is required, pull off
the black rubber cover from the Throttle Screw
and adjust. Screw clockwise to reduce CO
anti-clockwise to increase the CO
14. When the correct combustion readings are
achieved, replace the cover over the Throttle
Screw.
15. Press the DHW demand button to turn off
the appliance and when the burner has
stopped fi ring remove the Gas Valve electrical
connector of the heat engine and then replace
the connector on the next to be tested.
16. Remove the gas analyser probe from the fl ue
elbow and replace the sample point plug.
17. Press the RESET button on the front of the
control panel.
18. Repeat procedures 6 – 17 until all heat
engines have been tested.
19. Finally: Switch off appliance power. Refi t all
gas valve electrical connectors and ensure all
sample point plugs have been replaced into
each fl ue elbow.
NB. This appliance is optimised to provide Space
Heating and DHW in equal quantities. However,
if this appliance is used primarily for the supply
of DHW and has very little or no Space heating
demand, there is a small effi ciency benefi t if the
circulation pump on each heat engine (see fi g 7.3)
is moved from speed 3 to speed 2
iHE

FINAL CHECKS

Check the individual heat engines maximum rate
and combustion are to specifi cation.
See Table 1.0 and Datatable Inside Cover.
U
When commissioning is satisfactorily completed
the user must be instructed on the use and opera-
tion of the appliance and in particular detail:
- Hand over to the user the "User's Instruction
Guide" as well as all other lterature relating to the
appliance.
,
- Explain the importance of air vents and the fl ue
2
. Fig. 5.4
outlet system, and that they should not be altered
2
or interferred with in any way.
- Explain to the user the importance of internal
water pressure and how to restore it to the correct
value.
- Explain and demonstate to the user the correct
function and adjustment of the temperature,
thermostats and radiators for the economic use of
the system.
- Remind the user that in order to comply to the
regulations in force the appliance has to be
inspected and serviced regularly as indicated by
the manufacturer.
Finally these instructions should be handed over to
the user.
F
The Heater is fi tted with automatic Frost Protec-
tion. Provided there is Mains and Gas, if the LLH
sensor reads less than 8°C a Heat Engine will
fi re to bring the temperature up to 16°C. NB Other
Frost protection levels can be set according to
customer requirements.
A
The Heater is provided with an Anti-Legionella
programme. It set by default to be off but can be
set to be started manually or periodically. Lines
1640 to 1647 control how, and when this function
will operate.
25
Rating Table (1040 Btu/ft³) (38.8 MJ/m³)
kW gross Btu/h ft³ per min
102 348,271
152 518,992
H
SER ANDOVER
P
ROST ROTECTION
-L
NTI EGIONELLA
m³/2 mins
5.6 0.32
8.4 0.48
Table 1.0