ENERGY KINETICS EK1C, Инструкция по установке и обслуживанию

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Accel CS Boiler - Gas Heat - Eighth Edition – January, 2015 32
DOMESTIC HOT WATER
The Accel CS boiler uses a Plate Heat Exchanger (PHE) to make domestic hot water that is stored in an insulated tank.
The PHE separates the boiler water from the domestic water. The boiler circulator pumps hot boiler water through the
boiler side of the PHE, while the domestic circulator (the Smart Pump) circulates cold domestic water from the tank through
the domestic side of the PHE.
The Smart Pump is a low head, low flow circulator that circulates cold water from the bottom of the storage tank, through
the PHE where it is heated and then pumped back into the top of the tank through a special Dip Tube. When domestic hot
water flows from the tank and out to the house, the water does not flow through the PHE circuit unless the Smart Pump is
operating.
The plate exchanger is made of 316 stainless steel formed into corrugated plates and sealed by brazing. The ports are
arranged so that hot boiler water and cold domestic water flow through alternating channels. The exchanger is piped so the
boiler water flow and domestic water flow are in opposite directions. This is known as counter flow operation. The plate
exchanger can be back flushed in place which effectively cleans sediment from the plate passages. The brazed plate
exchanger can be easily removed and replaced or deep cleaned of scale by flushing with acid or other chemical cleaning.
Principle of Operation
The boiler will remain cold in standby until there is a call for domestic hot water from the storage tank thermostat. The
HOT WATER input light on the Condensing Energy Manager will turn on telling the Condensing Energy Manager there is a
call for domestic hot water. The Condensing Energy Manager will open the hot water zone valve and two seconds later,
send a heat demand signal to the Sola boiler control. The boiler circulator will begin circulating boiler water through the
Plate Heat Exchanger. The Sola boiler control will also change the boiler supply temperature setpoint from the heating
setpoint to the domestic hot water setpoint. The Sola boiler control will fire the burner and the boiler outlet will start to rise.
Zone Valve for PHE
(Locate on boiler supply)
C H
Cold Water Supply
006 Bronze Circulator
w/Integral Flow Check
See "Smart Pump Wiring".
Backflush Drain
PHE (Plate Heat Exchanger)
Pipe boiler side and tank side for counter flow.
Dip Tube in Cold port
Heat Trap
Hot Water
to House
Combo Tee/Drain
Smart Pump Assembly
Adaptor 3/4" FTG X M
Tee 3/4" X 1/2" X 3/4"
Boiler Side Backflush
Ball Valve & Drain (Optional)
1
2
" Ball Valve
Partially closing this valve will slow
the flow through the PHE and
increase the water temperature
entering the tank.
Use
3
4
" Copper to pipe
boiler side of PHE
AC
CE
L
C
S
Optional ball valves located on Boiler Return and Domestic Supply
Domestic Hot Water Zone Piping Schematic