Product Overview

OPERATidN
When the water temperature rises to the L4080 or
LB080 set point, the liquid fill in the sensing unit expands,
actuating a diaphram which interrupts the power supply
to the burner primary control (L4080) or the Pilotstat
power unit (L8080).
When the L4080 interrupts powerto the burner primary
control, the system automatically recycles when the
water cools and the L4080 switch closes.
On the L408OF and G, when the second limit is
reached, the Pilotstat power unit circuit opens, shutting
off all gas to the heater. Manual reset of the system is
required to restart
When the La080 interrupts powerto the Pilotstat power
unit, the water must cool to approximately 120 F [49 C]
and the gas control’s power unit must be reset before the
system will operate.
CHECKOUT
1
trol or main gas valve. Turn the L4080 to the low end of its
range, and be sure the control shuts off the burner when
Do not operate burner by lumpenng gas valve
the set point is reached. Set the L4080 High Limit Aquastat
terminals; this bypasses the temperature and limit
Controller to the manufacturer’s recommended setting
before leaving job.
The L8080A is factory-set and nonadjustable. Check
Turn on the power supply. Start the heating system
that the power unit drops out and that gas flow is
according to instructions supplied with the burner con-
interrupted when the L808O’s set point is reached (200 F
[93 C]. Reset power unit before leaving job.
lwwywoll Inc.
1666 Douglas Dnve N.
I
rnremationer tires OmCes in all principal Cities of the world. Manufachrrlng in Australia,
Canada, Finland,
Golden Valley, MN 55422-4366
France, Germany. Japan, Mexico. Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
PRINTED IN USA