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I n s t a l l a t i o n - P i p i n g / H o s e s l
3-45
Adjusting the Level Sensor
(optional)
The level sensor should be adjusted both with ambient temperature and with opera-
tion temperature. Refer to the instruction manual that came with your level sensor
for further detail. To calibrate the unit:
1
Turn both the COARSE and FINE potentiometers fully counter-clockwise.
The COVERED internal indicator light should be off.
2
Turn the COARSE poten-
tiometer slowly clockwise to
the point where the COV-
ERED indicator light just
turns on and says on.
3
Turn the FINE potentiometer
slowly clockwise until the
COVERED indicator light just
turns OFF.
(If the course
potentiometer has been carefully
adjusted, this should occur when
the fine potentiometer is between
the 8 and 10 o’clock positions.)
Now continue to turn the FINE
potentiometer clockwise to the
desired sensitivity setting.
High sensitivity: 1/16 turn
Medium sensitivity: 1/8 turn
Low sensitivity: 1/4 to 1/2 turn
IMPORTANT:
The calibra-
tion potentiometers are
delicate electronic devices.
Do not use excessive force
when adjusting.
NOTE:
It may be convenient
to think of the FINE poten-
tiometer as a clock face and
envision the distance between
consecutive hour numbers.
Turning the FINE potentiome-
ter clockwise one hour posi-
tion past the point at which
the covered indicator just
turns off would provide a high
sensitivity setting. Two hour
positions past that point
would provide a medium sen-
sitivity setting.
✐
Summary of Contents for HTC 120
Page 10: ...viii l Table of Contents ...
Page 30: ...2 14 l Description ...
Page 35: ...Installation General Installation General l 3 5 3 I n s t a l l a t i o n ...
Page 65: ...Installation Hard Piping Kits Installation Piping Hoses l 3 35 3 I n s t a l l a t i o n ...
Page 80: ...3 50 l Installation Piping Hoses ...
Page 88: ...3 58 l Installation Piping Hoses ...
Page 92: ...3 62 l Installation Conveying Lines ...
Page 93: ...Installation Water Lines 3 I n s t a l l a t i o n Installation Water Lines l 3 63 ...
Page 124: ...3 94 l Installation Gas Piping and Exhaust Flue ...
Page 125: ...Installation Testing 3 I n s t a l l a t i o n Installation Testing l 3 95 ...
Page 250: ...4 108 l Operation ...
Page 286: ...5 36 l Maintenance ...