Carrier 28QX - Manual (Page 4)

SAFETY CONSIDERATIONS
Installation, start-up and servicing of this equip­
ment can be hazardous due to system pressures,
electrical components and location of equipment
(roofs, elevated structures, etc.).
Only trained, qualified installers and service
mechanics should install, start-up and service this
equipment.
Untrained personnel can perform basic main­
tenance functions of cleaning coils, filters and
replacing filters. All other operations should be
performed by trained service personnel.
When working on the equipment, observe pre­
cautions in the literature, tags, stickers and labels
attached to the equipment and to any other safety
precautions that apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
•
Use caution when handling or working on glass
covered equipment such as solar collectors.
• Use care in handling, rigging and setting bulky
equipment such as storage tanks and solar
collectors. Be sure power to equipment is shut
off before performing maintenance or service.
INSTALLATION
IMPORTAMT; Follow unit location,, height
proxiimty and piping requirements in this
booklet carefully to enhance system efficiency,
and to avoid system failure. Read entire book­
let before starting installation.
Step 1 — Check Equipment and Jobsite
UNPACKAGE UNITS — Move units to final
location. Slide units from cartons, taking special
care not to damage service valves, pipe connec­
tions, compatible fittings or grilles. Rig solar
collector panels prior to unpackaging to prevent
possible damage, see pg 8.
INSPECT EQUIPMENT — File claim with shipping
company if shipment is damaged or incomplete.
REVIEW SYSTEM COMPONENT DATA - Units
comprising a Solaround''"''^ System are shown in
Fig. 1 and Table 1. Dimensional data in Fig. 2. As
shown, the Solaround includes a standard
38HQ/40FS heat pump system with addition of
equipment to provide solar assistance during heat­
ing season. The pump package, solar collector
panels, water storage tank and a section of 28QX
(Tri-X) indoor coil are a water heat transfer circuit.
Heated water, provided by solar panels, is pumped
from storage tank to indoor coil for water-to-
indoor-air heat transfer.
Accessory Hot Water Preheater reduces energy
required for heating domestic hot water during
cooling and heating seasons.
All Solaround system units are preselected with
the exception of field-supplied water storage tank.
Purchase or fabricate tank according to factory
specifications. See Step 3, pg 7, and 28QX
Application Data booklet.
Tri-X (28QX) Indoor Coil has separate water and
refrigerant circuits essential to the Solaround
system. The Tri-X serves 3 functions: transfers heat
pump (refrigerant) heating or cooling to indoor air;
transfers heat from storage water to indoor air;
transfers heat pump heat and heat from storage
water to indoor air.
The Tri-X is assembled to 40FS fan section and
40FQ electric heater in same manner as other 28
Series coils.
Plain Water or Glycol/Water Pump Package and
Solar Panels -- Water or glycol/water mixture is
pumped thru solar collector panels by pump
package. The liquid absorbs solar heat as it flows
thru the panels and is returned to storage tank
(plain water system) or expansion tank (glycol
system).
Both plain water or glycol systems, when
properly installed, feature fail-safe draining down
of liquid from solar panels to storage tank (when
circulating pump goes off). This prevents freeze-up
damage to panels.
CAUTION: A glycol system }.>5 preferable in
areas where prolonged periods of sab freezing
temperatures occur. Correct solar panel piping,
including a 2-1 /8 in. liquid draindown Kne, is
essential for proper system operation.
Table 1 — Solaround Systems*
PUMP PACKAGES
Water
34W a T67
34WA257
34WA367
Glycol
"31GÌLÌ67 '
34GL257
34 GL 367
SOLAR COLLECTOR PANELS
Min No. Max No.
30
WEATHERMASTER III HEAT PUMPS
Indoor
Compr
Section
38HQ
-
J34
.
-
^
Outdoor
Coil
Section
38HQ
~940
^^960
Indoor Unit Assembly
Fan
4£FS
^ 200
-200
2ÓÒ
Coil
28QX
036^
036
042
Electric Heater
40FQ920-
10 to 30 kw
*Any size water or glycol pump package and pre-determined number
of solar panels can be used with one of the Weathermaster III heat
pump assemblies above, i e 34WA257, 10 solar panels, 38HQ140,
38HQ960,40FS200/28QX042/40FQ920 - (15 kw) See Solaround
system Application Data booklet for Selection Procedure
NOTE:
On 40FQ-25 and 30 kw electric heaters, remove 60-va control trans­
former and replace with 75-va transformer (part no HT01 BD235)
available from Carrier Service Parts Center