HTP Drain Back, Установка, Запуск, Обслуживание, Запчасти, Гарантия

Страница: 8 / 27

lp-585 Rev. 000 Rel. 001 Date 9.10.18
8
N. Hail Resistance
Solar collectors are surprisingly strong and able to handle significant
impact stresses once installed. Testing and impact stress modeling
proves that when installed at an angle of 40
o
or greater, collectors
are able to withstand impact from hail larger than 1” in diameter. The
ability of collectors to withstand hail impact is greatly influenced by
the angle of impact, so installing the collectors at low angles does
reduce their impact resistance.
O. Storage Tanks
It is recommended that the lever on the pressure and temperature
relief valves (PTRV) on main pressure hot water storage tanks be
operated once every 6 months to ensure reliable operation. It is
important to raise and lower the lever gently, and be careful as the
water released will be HOT. Failure to operate the PTRV on a regular
basis could lead to failure of the component and the possibility of the
storage tank exploding.
It is recommended, and may also be a local regulation, that, in order to
expel water safely, the PTRV have a copper pipe connected and run to
an appropriate drainage location. The PTRV and drain outlet pipe must
not be sealed or blocked.
NOTE:
If the water heater is left in an operating condition and not used
for two weeks or more, a quantity of highly flammable hydrogen may
accumulate in the top of the water cylinder.
To dissipate hydrogen safely, it is recommended that a hot water tap
be turned on for several minutes at a sink, basin, or bath, but not
a dishwasher, clothes washer, or other electrical or heat producing
appliance. During this process, there must be no smoking,
open flame, or electrical appliance operating nearby. Hydrogen
discharged through the tap will sound like air escaping. Failure
to dissipate hydrogen properly could result in explosion and fire,
serious property damage, severe personal injury, or death.
P. Sizing the Drain Back Tank
Part 4 - Installation
A. Checklist
Location
• Sufficient room to service drain back tank, piping, and related
controls
• Provisions made to protect area from water damage
• Centrally located to fixtures
• Protected from freezing temperatures
• Area free of flammable and/or corrosive vapors
Potable Water Supply
• All related piping free from leaks
• Thermal expansion tank installed
• Water heater and fixtures have been properly purged of air
• ASSE 1017 rated thermostatic mixing valve IS REQUIRED PER
SRCC OG-300
B. Tools and Materials
The following is a minimum list of basic required tools. Other
plumbing components will be field supplied according to
installation needs.
COLD WEATHER HANDLING - If the water heater has been stored
in a very cold location (BELOW 0
o
F) before installation, handle
with care. Failure to do so could result in damage to the water
heater.
Electric Drill
Drill Index (w/ 1/2”,
3/4”, 1”, and 1 1/4”
Wood Bits)
Torch and Striker
Putty Knife Hack Saw
High Temperature
Joint Compound
Tubing Cutter Tin Snips Solder Flux
Tape Measure Emory Paper 24” Level
Extension Cord Slip Joint Pliers Needle Nose Pliers
Silicon Caulk and
Roof Tar
Pipe Wrenches, 10”
and 14”
Angle Iron
Open End Wrenches
9/16 & 7/16
Screw Driver 6” Flat
Blade
Screw Driver 6”
Phillips
Wire Stripper or
Knife
Wire Cutters
Black Latex Outdoor
Paint
Adjustable
Wrenches 8” & 10”
Aluminum
Flashing Sheet
Flashlight
Extension Cord
Wire Nuts or
Connectors
Threaded Rod, Nuts,
and Washers
Miscellaneous
Copper Pipe and
Fittings (3/4”)
1” x 3/4” Copper
Sweat Couplings
1” Copper Sweat
Caps
Minimum 3/4” ID
Type M Copper
Tubing
Stainless Screw
Clamps
Thermal Adhesive
7/8” x 3/4” and 1
1/8” x 3/4” Pipe
Insulation
Table 4 - Basic Required Tools
C. Locating the Drain Back Tank
This drain back tank is certified for indoor use only. DO NOT INSTALL
OUTDOORS. Outdoor installations ARE NOT covered by warranty.
To minimize expense, choose a location for the drain back tank as
To ensure proper operation of the drain back solar system, the drain
back tank volume should be sized with double the volume capacity of
the total volume of the solar collectors and all solar piping above the
drain back tank.
For example:
An HP-30SC Evacuated tube solar collector has a .3 gallon capacity.
100 feet of 1” copper pipe has a 4.6 gallon capacity.
The capacity of the collector and piping equals 4.9 gallons.
The system requires a 10 gallon drain back tank.
• Have water supply tested and ensure it meets the
requirements outlined in this manual
Relief Valve
• Temperature and Pressure relief valve properly installed and
discharge line runs to open drain
• Discharge line not exposed to freezing temperatures
• Discharge line constructed of copper
Anti-Freeze Fluid (If Used in System)
• Make sure freeze protection fluids are certified non-toxic,
FDA rated GRAS
• Glycol percentage must be calculated per local area freeze
level
• Provide glycol MSDS sheet to end user
NOTE: Make sure you have all necessary tools, materials and
accessories before beginning work on the solar system.