Carrier 28QX - Manual (Page 12)

I N S T A L L FLASHING, INSULATION AND
FRAME ENCLOSURE after system has been leak
checked. Completely insulate piping with 3/4-in.
closed cell flexible rubber insulation such as
Armaflex or Rubatex. Eiberglass insulation may
also be used, however, any non-rubber insulator
must be waterproofed. Do not leave any portion of
tubing uninsulated or significant heat losses will
result.
Install a flashing over both header assemblies to
make installation weathertight, Fig. 11.
Complete the collector panel installation by
enclosing the exposed sections (ends and back) of
wooden mounting frame. Wind can lift an exposed
frame and dislodge panels. Use 1/4-in. exterior
grade plywood or similar lightweight material. This
provides some protection from wind damage, and
snow buildup.
Step 5a — Install Plain Water Pump Package
specified by Carrier. Review System Requirements,
Pg6.
MOUNT ON FLOOR — Plain water pump and
control package (Fig. 12) can be mounted directly
on a floor. A fixed mounting is not necessary as
the unit’s weight is sufficient to keep the unit in
place. Provide service access at rear, front and
sides of unit. Fig. 2. If the floor on which the unit
is placed is subject to flooding, raise the unit so
that the flood water cannot enter the unit.
MAKE WATER PIPING CONNECTIONS - Use
water grade copper tubing or better. Sweat all
connections and joints with solder (95-5). Tubing
sizes for solar collector piping loop are specified
(by Carrier) for system. (A 2-1/8 in. OD collector
loop return line is used on all systems.) Tubing
sizes for Tri-X coil water loop and domestic water
preheating piping are shown below. Four pipe
connections are required on plain water pump
package, Fig. 2. Typical piping diagrams for com­
pleted systems are shown in Fig. 16 and 17.
Collector Loop (Fig. 13) — Begin this loop with a
1-1/8 in. pipe leaving the bottom of the storage
tank. The pipe enters the pump package at the
“storage supply” (second from right) stub. After
passing thru the collector pump, (No. 2), the loop
exits the unit at the “collector supply” stub and
#
CONTROL
BOX ■
WATER CONN
TO TRI-X WATER CONN. FROM
STORAGE TANK
(TO BE .HEATED)
LOW VOLTAGE
TERMINAL COMPARTMENT
NON-ADJUSTABLE
AQUASTAT
ADJUSTABLE AQUASTAT
SOLAR COLLECTOR
PANEHS) PUMP (P2)
WATER CONN
TO SOLAR
COLLECTORS
WATER CONN. FROM
STORAGE TANK
(PROVIDES HEAT)
TRI-X COIL PUMP
(P|)
BALL VALVES
Fig. 12 — Plain Water Pump Package (Panels Removed)
12