Appendix 'B' - Control Thermostat Setting Procedure - Hamworthy Wessex 100 M100 Installation, Commissioning And Servicing Instructions

LANDIS AND GYR THERMOSTAT
Adjusting the limitation of angle of rotation only for
thermostats with drum type setting knobs.
1) Pull the setting knob off of the thermostat
spindle
2) Remove the spring clip and limit stop discs (1)
and (2) from the inside of the setting knob.
3) Insert limit stop disc (1) into the setting knob so
that its stop arm locks onto that rib having the
guide number (5) which corresponds to the start
value of the desired setting range.
4) Insert the limit stop disc (2) in the same manner,
but this time choosing the rib and guide number
SETTING LIMIT
RANGE STOP
ºC DISC
No
50-110 1
2
IMIT THERMOSTAT
1) Pull the setting knob off of the thermostat
spindle.
2) Reposition the spring stop inside the control
knob to the new setting.
3) Push the control knob back on the spindle and
rotate to ensure the settings provide the correct
desired setting range.
HAMWORTHY HEATING LTD
Appendix B Wessex 100 M Series
CONTROL THERMOSTAT SETTING PROCEDURE
1 3 5
A 50 55 60
B 50 55
which corresponds to the end value of the
desired setting range.
5) Replace spring clips, thus securing the limit stop
discs.
6) Push the setting knob back onto the thermostat
spindle so that the stop screw is located within
the selected setting range.
7) Rotate the setting knob to the limit stops of both
ends of the scale to check the adjusted range
against the setting scale.
A Desired start value of the setting range in °C.
Corresponding guide number for limit stop disc (1).
B Desired end value of the new setting range in °C.
Corresponding guide number for limit stop disc (2).
7 9 11 13
65 70 75 80
60 65 70 75
IMPORTANT When setting the adjustment of both
thermostat control knobs it must be ensured that
the boiler will not produce water with an outflow
temperature of less than 50°C.
31
WESSEX 100 M
15 17 19 21
85 90 95 100 105 110
80 85 90 95
23 25 27
100 105 110
500001080/F