Carrier 28QX - Manual (Page 8)

INSULATE STORAGE TANK - Prior to making
the tank installation, consider that the tank will
have to be insulated. The insulation will have to be
placed all around the tank, including underneath it.
This can be accomplished by either placing an
insulating pad beneath the tank (one which can
carry the weight without degrading) or by mount­
ing the tank on channels. The channels should be
high enough to accommodate the necessary thick­
ness of insulating material. Tank should not be
completely insulated until it is leak tested. See
Initial Start-Up on pg 23. The recommended
insulation level for indoor tank locations is R-20.
Acceptable insulation materials depend upon the
tank type and location. Use only non-toxic
insulating material. Typical insulation and thick­
nesses for R-20 are:
Extruded Styrofoam (not bead board)
with skin........................................................ 4-1/2 in.
Urethane................................................................ 4 in.
Fiberglass, Batt......................................................6 in.
Fiberglass, High density board............................. 5 in.
Indoor Locations
a. Insulation must meet HUD flame spread limits
as follows (ASTM E84-70):
Plastic Foam 25
Other
150
b. For moisture permeable tanks such as concrete
or wood, the insulation should be designed to
avoid trapping moisture. Low permeability
closed cell foam insulation should be used. If
fiberglass is used, a moisture barrier should be
provided at the tank surface; and if a cover is
used over the fiberglass, it must be permeable
(such as canvas).
c. Tank lids or manholes must have a positive seal
to prevent moisture loss into the insulation or
the occupied space. Lid or indoor cover must
have positive lock in open position so that
servicing can be done safely. Do not enter tanks
without person(s) capable of pulling you out of
tank in attendance.
Outside Locations (not recommended)
a. Recommend foam in place of urethane insula­
tion, or closed cell foam insulation boards such
as urethane and styrofoam.
b. Recommend a plastic film (10 mil poly­
ethylene) liner for the excavation, into which
the preinsulated tank is placed, or into which
the insulation is foamed around the tank. Do
not cover controls or piping with foam. Sealing
of joints in slab type insulation should be made
with mastics or adhesives recommended for the
type of insulation used. Consider tank freeze-up
protection.
Step 4 — Install Solar Collector Panels
CAUTION: Be careful rigging, handling and
installing solar coiiectoxs. Tops of coHectors are
^ass and ЪгеакаЫе.
Rig and lift collecior(s) to roof before un­
packaging from shipping crate or carton. Lift
with boom tnick or crane. If Iiand-Iifted to
roof, slide single collector up 2 ladders vrith a
guide rope on top and 2 men on roof pulling on
rope and taking weight off 2 men below. Use
extreme caution not to lose balance or control
of rope.
RIGSiNG A CRATS OF COLUSCTORS
ROiSTiNG A SlNGtX COLLECTOR UP TWO LADDERS
Do not use solar collector as a primary' roof
surface. Mount them on a roof constructed to
good roofing standards.
Properly seal all entries thru roof including
where
collector sleeper frame or mounting
frante is attached to roof.
Flash sieeper frame or mounting franre to
prevent entry' of moisture and ice or snow
build-up beneath collectors installed in areas
where subfreezihg temperatures occur.
Number of panels required, mounting angle
(slope) of panels and liquid supply pipe size (OD)
is specified by Carrier solar CLIC program and
included in job plans. Refer to Fig. 2 for panel