SunEarth CASCADE 2 Installation, Operation And Maintenance Manual Download

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the drainback on the uppermost floor, preferably near
the ceiling.

Drainback tanks are factory insulated to provide both
heat retention and a noise buffer against the sound of
falling water.

If your Torrent Drainback system includes the optional
flow meter it should be plumbed so that the top of the
flow  meter  is  level  with  the  top  of  the  drainback  tank
so  that  the  flow  meter  also  provides  a  visual  check  of
the  fluid  level  in  the  system.    The  top  and  bottom  of
the flow meter should be supported to relieve stresses
on the connecting unions.

DO  NOT  install  the  pressure  relief  valve  (COMPONENT
#9)  on  the  drainback  tank  at  this  time.    The  COMPO-
NENT #9 is threaded in place after the solar loop piping
has  been  filled  with  water.    See  Section  4.13  for  in-
structions on charging the system.

4.12 Electrical and Wiring Requirements

When the electric element is used as the auxiliary heat
source a properly licensed contractor shall make the
230 VAC electrical connection to the water heater or
storage tank. If your solar contractor is not allowed by
law to make these connections consult a licensed elec-
trician.

Never  activate  the  circuit  breaker  controlling  the  elec-
trical  heating  element  until  the  solar  storage  tank  is
completely  filled  with  water.  This  will  prevent  “dry  fir-
ing” and destruction of the heating element.

SunEarth  recommends  the  use  of  a  115  VAC  differen-
tial  control  with  a  factory  installed  six  foot  line  cord.
The  installation  requires  one  115  VAC  outlet  to  be  lo-
cated neat the solar storage tank. The circulation pump
line  cord  is  then  plugged  into  the  receptacle  on  the
controller. A 230 VAC control and circulation pump may
be substituted where appropriate.

4.13 Heat Transfer Fluid (HTF)

The HTF must be a non-toxic fluid that meets FDA Gen-
erally Recognized as safe (GRAS) Classification. The
Torrent Drainback System uses water to meet this re-
quirement.

Water used to fill the collector loop must meet certain
minimum standards for purity. Impurities in the dilu-

tion water can increase metal corrosion, and cause the
formation  of  scale  and  other  deposits  on  the  heat  ex-
changer’s  internal  heat  transfer  surfaces.    Distilled  or
deionized water is recommended.

4.14 Flushing and Filling the System

Once the components have been plumbed it is time to
fill the solar storage and collector loop with water as
follows:

4.14.1 STEP 1 – Flush and Fill the potable loop with
water.

potable

flushing

combination

valves

(COMPONENTS #24 & 36). Fill the solar tank with wa-
ter and check that there are no leaks on the potable
side of the system.

Do this by opening the cold water isolation ball valve to
the  solar  tank  (COMPONENT  #8)  and  opening  a  hot
water  outlet,  such  as  a  faucet,  until  the  water  runs
freely.  When the tank is filled, inspect all threaded fit-
tings and solder joints for leaks.

Connect a washing machine hose to the drain ports of
the potable flushing combination valves (COMPONENT
#24 & 36). Open domestic flushing combination valves
drain ports (COMPONENT #24 & 36).

Open  potable  flushing  valve  (COMPONENT  #36)  and
close  valves  drain  port  when  water  flows  out  of  the
hose. Close domestic flushing valve (COMPONENT #24)
drain valve when water flows clear from the hose.

Open potable flushing valve (COMPONENT #24). Check
for leaks. The entire potable piping is now pressurized
with potable water.

4.14.2 STEP 2 - Flush and Fill the solar loop piping with
water.

Close solar flushing combination valves (COMPONENTS
#11 & 35).

Connect a washing machine hose to the solar flushing
combination valve drain port (COMPONENT #11), open
the solar flushing valve drain port (COMPONENT #11).
Connect the other end of the hose to a water pressur-
ized water source or a utility pressure pump.

Connect a washing machine hose to the solar flushing
combination valve drain port (COMPONENT #35), open
the  solar  flushing  combination  valve  drain  port
(COMPONENT #35). Open the water pressurized water
source.  Run  until  clear  water  runs  from  the  washing
machine hose connected to the solar flushing combina-
tion valve drain port (COMPONENT #35).

Open  the  solar  flushing  combination  valves
(COMPONENTS  #11  &  35).  Close  the  solar  flushing
combination  valves  drain  ports  (COMPONENTS  #11  &
35),  turn  off  the  water  source.  Verify  water  level  in
drainback tank is within 1 inch from the top of the sight
glass or flow mater; fill or drain as necessary.

4.14.3 STEP 3 – Run the pump to check operation and

TABLE 3—Specifications for SunEarth CopperStor

Drainback Reservoirs

SUNEARTH

MODEL

NUMBER

WIDTH

(IN)

LENGTH

(IN)

DEPTH

(IN)