Quantech QCC3, Manual

Page: 10 / 60

QUANTECH
FORM QCC3-EG1 (517)
10
Accessories and Options
All options are factory installed unless otherwise noted.
COMPRESSOR AND PIPING OPTIONS:
Chicago Code Relief Valves
– Unit will be provided with relief valves to meet Chicago
code requirements.
Hot Gas By-Pass – Permits continuous, stable operation at capacities below the mini-
mum step of compressor by unloading to as low as 5% capacity (depending on both the
unit and operating conditions). This is accomplished by introducing an artificial load. Hot
gas by-pass is available installed on refrigerant system #1 or on both systems of two cir-
cuited units..
Service Isolation Valve
– Service suction and discharge (ball-type) isolation valves are
added to unit per system. This option also includes a system high pressure relief valve in
com pliance with ASHRAE 15.
CONDENSER AND CABINET OPTIONS:
Condenser coil protection against corrosive environments is available by choosing any of
the following options. For additional application recommendations, refer to FORM 150.12-
ES1.
Pre-Coated Fin Condenser Coils – The condenser coils are constructed of black epoxy-
coated aluminum fins. This can provide corrosion resistance comparable to copper-fin
coils in typical seashore loca tions. Either these or the post-coated coils (below), are rec-
ommended for units being installed at the seashore or where salt spray may hit the unit.
Post-Coated Dipped Condenser Coils – The unit is built with dipped and cured con-
denser coils. This is another choice for seashore and other corrosive appli cations (with
the exception of strong alkalies, oxidizers and wet bromine, chlorine and fluorine in con-
centrations greater than 100 ppm).
Copper-Fin Condenser Coils – The unit constructed with condenser coils which have
copper fins. (This is not recommended for units in areas where they may be exposed to
acid rain).
Enclosure Panels (Unit) – Tamperproof Enclosure Panels prevent unauthorized access
to units. Enclosure Panels can provide an aesthetically pleasing alternative to expensive
fencing. Additionally, for proper head pressure control, Quantech recommends the use of
Condenser Louvered Panels for winter applications where wind gusts may exceed five
mph (eight km/h).
The following types of enclosure panels are available:
Wire Panels (Full Unit) – Consists of welded-wire mesh guards mounted on the exterior
of the unit. Prevents unauthorized access, yet provides free air flow.
Wire/Louvered Panels – Consists of welded-wire-mesh panels on the bottom part of unit
and louvered panels on the condenser section of the unit.