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ZONE CONTROL ACCESSORIES
Solenoid
The sturdy three-way switches used in the Airzone solenoid panel connect to
the vacuum and pressure side of the pump while the common port connects to
the field damper tubing. Normally open or normally closed operation is
field-selectable by reversing the tubing connections. Each SOL can inflate
one or more Flexdampers. ALL Flexdampers tied to a solenoid will open and
close simultaneously.
Specs: 24V operated at about .33 amps. 4.5"x2.5'" x 3" Used as replacement
or expansion.
Solenoid -- $54.00
Expansion Pump
The pump used with the SPP panel is a long lasting, continuous duty pump that provide both a source of pressure and a
source of vacuum. The pump contains two internal 24VAC relays designed to
operate the pump in conjunction with the HVAC blower and furnace. Two
diaphragms give a redundant action for extra long life. One pump should
provide adequate airflow for most applications, except where a large number
and/or very large Flexdampers are used. If more damper speed is needed,
order an additional pump. The pump is designed for wall mounting next to the
solenoid panel.
Specs: 3.5"x6"x2.5", about 2 lbs. 11O VAC with 24VAC interface
Expansion Pump -- $65.00
Transformers
40VA Plug in transformer use on all zone control systems. Fuse
protected, screw terminals. ALSO COMES IN HARDWIRE AND 75VA. Specs:
3.5"x2.75"x2.25,
about 1 lb.
24VAC, 40VA,
1.7 AMP
40 Va Plug In Transformer -- $18.00
75 Va HARDWIRE Transformer -- $29.00
PLENUM TUBING
Plenum Tubing
120' roll, 3/8 o.d., 1/4 i.d. Plenum Tubing -- $32.00
PRODUCT: 250' roll, 3/8 o.d., 1/4 i.d. Plenum Tubing -- $49.00
Fire Rated Connect Tape
Ten yards of special heat activated tape for joining ends of round
Flexdampers, not needed for rectangular Flexdampers
.
PRODUCT: Fire Rated Connect Tape -- $8.95
ECL Evaporator Control Limit Switch
RetroZone's popular ECL switch is a great, low cost, low refrigerant
temperature switch that prevents AC coil freeze up. Frozen coils can be
caused by improper refrigerant charge, dirty filters, malfunctioning
dampers, burned out fans, and many other reasons. The ECL switch
snaps on the suction line at the evaporator coil, and has a simple two wire
connection that can wire in series to the "Y" compressor circuit. At 38° F
refrigerant suction line temperature, the contacts open to offline the
compressor, and does not reset until 50° F. Flutter-proof snap acting switch
will not short cycle compressor, and can also be used to open all dampers on
a zoning system. Great protection, great price, and well proven.
Specifications: About l"xl"x2" with bracket., 15 AMP contacts
 .
Evaporator Control Limit Switch -- $12.00
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