2 Channel Clock - gledhill BoilerMate A-Class OV SOL Series Design, Installation & Servicing Instructions

DESIGN
The duty/location of the various sensors is as follows.
Sensor Duty
S1 T Overheat 1
S2 T Overheat 2
S3 T DHW in
S4 T DHW out
S5 T Store bottom
S6 T Store middle
T Solar collector
SC
- flow
SR T Solar return
T Solar zone
SZ
- store
Symbol
Show the actual current temperature at the domestic cold water
S3 and S4 inlet/hot water outlet sensors respectively. The respective control
set points are 35°C and 55°C respectively
Shows the current actual energy input in kilowatts from the solar
Q
system
Shows the actual current flow rate in litres/minute in the solar
F
circuit
Shows the actual current speed of the modulating solar circulating
Sp
pump as a percentage of the maximum
The temperature at which the thermal store is satisfied, when being supplied with
heat from the boiler is 77°C (i.e. the off control set point of sensor S6).
The solar system will start from a minimum 10°C differential between the temperature
in the store SZ and the temperature at the solar panel (collector) SC i.e. the solar
circulating pump only runs if the temperature as SC is at least 10°C above the
temperature at SZ. The solar will continue to run, once started, until the differential
narrows to 2°C and will then stop until a differential of 10°C is achieved between SZ
and SC. The pump speed will continually modulate to ensure that any available solar
energy is always being transferred to the store.

2 Channel Clock

A 2 channel digital Grasslin clock is provided to allow separate control of the hot water
and heating requirements in accordance with the latest Building Regulations.
Details of how to set the clock are provided on the User label and in the User
Instructions.
Channel 1 controls the operating times for the boiler/primary circuit. This should
normally be set to constant to allow the hot water to be available 24 hours a day.
The appliance controls will always give priority to heat input from the solar system
and will only energise the boiler if this is required to meet the hot water and heating
demands placed on the appliance.
Channel 2 controls the operating times for the central heating circuit and should be
set to suit the householders lifestyle.
Location
Top of store in dry pocket (S1 & S2 are in single
housing)
In cold water inlet pipe (Wet i.e. direct)
In hot water outlet pipe (Wet i.e. direct)
Bottom of store in dry pocket for store charging
Middle of store in dry pocket for store charging
Supplied wired - to be fitted by the installer in the
sensor pocket provided in the solar panel (collector)
or in the flow pipe immediately adjacent to the
collector.
In solar return pipe - integrated with flow sensor
Bottom of store in dry pocket for solar charging of
store
Description
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