Tankless Water Heater (Eg And Peg Only); Rollout Thermal Fuse Element (Cga, Cgi, Eg, & Peg Only); Spill Switch (Cga, Eg, & Peg Only); Boiler Illustrations - Weil-McLain CGa Series User Manual

maintenance
Boiler Components
1

Tankless Water Heater (EG and PEG only)

If boiler is used to supply domestic hot water, limit
control should be set to supply adequate hot water
Weil-McLain tankless heaters are rated at 200°F
boiler water temperature To get rated output, set low
2
limit at 200°F
Limit can be adjusted to meet system hot water
requirements. Differential can be set to 15° and
adjusted to control level. Lowering the differential will
cause a slight variation in water temperature but will
decrease burner on-off cycling. High limit should be
3
set at least 20° above low limit
Rollout Thermal Fuse Element (CGa, CGi, EG,
& PEG only)
Cuts off gas flow should flame roll-out occur. See
4
Figure 2
WARNING
!
Do not attempt to place boiler in operation if
rollout thermal fuse element cuts off gas flow.
Immediately call a service technician. Failure to
do so can cause severe personal injury, death or
5
substantial property damage.
Spill Switch (CGa, EG, & PEG only)
Cuts off gas flow should vent system become
blocked See Figure 3
6
WARNING
!
Do not attempt to place boiler in operation if
spill switch cuts off gas flow. Immediately call a
service technician. Failure to do so can cause
severe personal injury, death or substantial
property damage.
7
Pressure Switch (LGB only)
Cuts off gas flow should vent system become
blocked See Figure 4
After resolving the fault, reset the control: press
8
Enter (square symbol), and use the arrow keys to
select YES The fault will be reset, and the error
screen should revert to default display If fault re-
occurs, contact a service technician
14
cg , cg , eg, peg, & lgb user manual
a i
Figure 2
Rollout thermal fuse element
Figure 3
Spill switch
Figure 4 Pressure switch
220269
550-142-301/0123