Carrier 28QX - Manual (Page 6)

The plain water Solaround'''''^ System has 2
water piping loops — a solar collector panel loop
and a Tri-X coil loop. The glycol system has 3
piping loops — a collector panel water/glycol loop,
a water/glycol to water heat exchanger loop (thru
the pump package), and a Tri-X coil water loop.
See Typical Piping Schematic diagram. Fig. 3. Solar
panel placement on roof must be at correct angle
to absorb maximum amount of solar heat.
Solaround System Selection for each installation is
provided by Carrier Solar CLIC (Computer Load
Information Center). It computes number of solar
collector panels required, angle placement of
panels, volume of water storage tank, supply piping
sizes, and most beneficial accessory hot water
preheating arrangement. Capacity ratings and
system selection data are contained in Solaround
System Application Data.
COMPLETE SYSTEM REQUIREMENTS AND
CONSIDER SYSTEM RECOMMENDATIONS ^
Plan to locate system components as close together
as possible for easier installation, service and higher
system operating efficiency. Use piping schematics.
Fig. 16, 17, 23 and 24, as a guide. Before starting
installation, study remaining system requirements
and installation data, page 4 thru 22. Adjust
component location as required.
WARNING; An improper installation can cause
system to .maifunction and damage could result.
Summary of System Installation Requirements
necessary for proper operation of plain water or
glycol systems:
a. Pitch solar panel piping downward in vertical
plane a minimum of 1/4-in./ft for proper
drainage to storage tank.
b. Vent storage tank with 1/4-in. tubing.
c. Be sure all water pumps have a positive suction
head (minimum liquid pressure at pump inlet)
by locating pumps a minimum of 2 ft below the
lowest water level in storage tank.
d. Install a storage tank drain.
e. Provide a closed loop piping system for Tri-X
coil by terminating inlet and outlet line a
minimum of 6-in. from bottom of storage tank.
f. Horizontal runs of water supply lines leaving
the storage tank must not be above the lowest
water level in storage tank unless a closed loop
system (item e) is used. This prevents lines from
draining and loss of pump prime.
g. Install pump packages indoors and where tem­
perature does not fall below freezing.
System Recommendations
a.
Locate all indoor equipment, particularly the
storage tank, pump and control package and
fan coil at the same height level and in close
proximity, to each other for easier piping.
It is recommended that the Tri-X coil be at the
highest point in the coil water piping loop but
not more than 6 ft above water level in storage
tank. This ensures easier air venting and elim­
inates special water filling procedure, pg 23.
b. Avoid additional installation, service and main­
tenance problems by not burying the storage
tank. See pg 7.
c. Do not use any additional valves in piping other
than those that are specified by the installation
instructions.
d. Locate solar collectors directly above pump
package at a height not exceeding 30 ft from
top of water in storage tank to top of collector.
e. Actual length of piping from storage tank to
the pump package must not exceed 15 ft or
remote aquastat installation is required.
Step 2 — Install Weathermaster III Heat Pump
System
CAUTION: Observe all precautions included in
3SHQ and 40FS installation Instruciions.
Follow normal installation procedure for 38HQ
compression section, outdoor coil unit and 40FS
indoor fan coil assembly. (See wiring changes on
pg 20.) Refer to 38HQ and 40FS Installation
Instructions supplied with units. Available acces­
sories for the heat pump system can be used
without deviation from an application where the
heat pump alone is installed.
Assemble the Tri-X coil (casing) with 40FS fan
section and 40FQ electric heater in same manner as
other 28 Series coil for upflow airflow. Horizontal
airflow assemblies are permissible, but require a
field fabricated horizontal condensate collector.
Unit cannot be installed in downflow position. Coil
inlet duct connection flanges are provided on 40FS
filter section rack. It is recommended that as­
sembled fan coil be located in same area as other
interior system components, with the Tri-X at
highest point in water piping loop but not more
than 6 ft above water level in storage tank, pg 13.
The fan coil can be located elsewhere with restric­
tions placed only by the allowable length of
interconnecting refrigerant tubing.
MAKE PIPING CONNECTIONS - Tri-X coil has
Compatible Fitting refrigerant line connections and
copper pipe stubs for water line sweat connection.
Replace the AccuRater'^^ refrigerant control
piston in the Tri-X coil as required before connec­
ting refrigerant lines. See Table 2 for piston sizes.
Make refrigerant line connections. Use a back-up
wrench on AccuRater when making refrigerant
liquid line connections. Follow recommended
piping length in 38HQ booklet.
Water line connections are described under Step
5a and 5b.
MAKE ELECTRICAL CONNECTIONS
Step 6 on pg 20 for wiring connections.
See