General information
17
VALVE MAINTENANCE
The valve is a very delicate mechanism, so the system operator must check its efficiency. If necessary, contact a technician
authorised by the manufacturer.
It is good practice for the safety valves installed to protect the plant:
–
to be operated (once a week) with system pressurised, by activating the manual lifting lever of the shutter
–
to have their calibration checked once a year, directly on the system or with bench test
–
to be subjected to overhaul every two years
–
to be replaced after ten years of operation
m
IMPORTANT
The safety valves are designed and built to operate without lubricant; simply keep them clean and efficient. Always
refer to the specific manual.
TEMPERATURE
THERMOREGULATION AND MESSAGE DISPLAY
Thermoregulator front
1
Instructions:1 =2nd stage of burner on (enabled to work)2 =Burner on (enabled to work)
2
Display of flow temperature measured or indication of the variable during the thermoregulator parametrization phase (HSET
- SP - AL2 - HAL2)
3
Display of the burner AL2 (ON-OFF variable) or of the sets of variables during the thermoregulator parametrization phase
(HSET - SP - AL2 - HAL2)
4
Enter key, its pressure allows accessing variable parametrization and if you push it again it scrolls the sequence of variables(HSET
- SP - AL2 - HAL2)
5
Up and down keys for the variables during the thermoregulator parametrization
Variable functions
HSET = Set Point hysteresis(working temperature hysteresis, burner 2nd stage control)
SP= Set Point(working temperature, burner 2nd stage control)
AL2= Limit temperature set(burner ON-OFF control)
HAL2= Limit Set hysteresis(limit temperature hysteresis, burner ON-OFF control)
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz
