Maritime Geothermal EM (DX) 45-55-65, Руководство по установке

Страница: 23 / 32

Page .... 23
Maritime Geothermal Ltd. 17-Feb-00
In-line Flowmeter
Digital Thermometer
Refrigeration Gauges
Amprobe
Trouble Shooting Tools
The Dole® flow control is a simple, self-
cleaning device designed to deliver a con-
stant volume of water from any outlet
whether the pressure is 15 psig or as high as
125 psig. The controlling mechanism con-
sists of a flexible orifice that varies it’s area
inversely with pressure so that a constant
flow is maintained.
Dole flow control Valve
Fault Possible Cause Verification Recommended Action
DOMESTIC
HOT WATER
Insufficient hot
water.
Circulator pump not operating.
Heat pump not operating.
Switch set to “OFF”
Valves shut off
Use an amprobe to measure current
draw.
Observe any shut-off valves for loca-
tion. Replace if faulty.
Blockage or restriction in the
water line or hot water heat
exchanger. Check water flow and power to
pump. Check water lines for obstruc-
tion Remove obstruction in water
lines. Acid treat the domestic hot
water coil.
Thermostat (if equipped) is
open. Check contact operation. Should
close at 40°C and open at 45°C. Replace thermostat if faulty.
Electric
Elements in
Storage Tank
not operating.
Disconnect switch open, or
breaker open in electrical sup-
ply to heat pump. Check both line and load sides of
fuses or breakers. If switch or
breaker is open determine why. Replace blown fuse or breaker or
close switch.
Electric element breaker inside
electric panel of heat pump
shut off. Check voltage at elements with mul-
timeter. Check for grounded or open
element. Reset breaker.
Second stage of aquastat on
hot water tank set too low.
Should be set at 38° to 40°C. Visually inspect the setting.
Temporarily adjust the setting up to
see if the elements engage. Readjust the setting to 40°C.