HARDY MANUFACTURING CO., INC (MODEL LC300, LC500 & LC2500)
PAGE 30
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Water Circulation System
LOW TEMPERATURE SENSOR, P/N H2000.36
This sensor can be wired in the wood heat thermostat circuit to prevent the pump from
running when the water in the Hardy Hydronic Heater is not hot. The sensor has a set
of contacts that close when the water rises to 110ºF and open when the water drops to
90ºF.
WATER PUMP RELAY, P/N H2000.52
This is a Honeywell DPDT relay with a 24 volt coil. Terminal 4 and 6 (normally open
contacts) are used to turn on the water pump. Control voltage (24 volts) connected at
terminals 7 and 8 routed through a thermostat energizes the relay.
WATER PUMP FOR HEATING SYSTEM, Taco 009 pump P/N H502.50
with stainless steel body. If the pump will not run, first unplug the power cord then
check the water pump relay. The relay can be bypassed by moving the wire on
terminal 6 to terminal 5 (terminals 4 to 5 is normally closed) and disconnecting the
thermostat wire from terminal 8. Now plug the power cord back in. This should supply
115 vac directly to the pump. If the pump will still not run, unplug the power cord.
Remove the four bolts holding the pump to the pump housing. Remove the cartridge
from the pump. Spin the impeller if it will not spin, replace the cartridge. If the impeller
will spin, it may have been temporarily stuck (reassemble and try again) or the problem
is the electrical winding or capacitor. Use an ohm meter to check the winding and
capacitor. If the capacitor is defective, replace it. If the electrical winding is defective,
replace the complete pump.
Содержание LC300
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