Quantech QTC2015T Manual page 11

Accessories and Options (Cont'd)
QUANTECH
Service Isolation Valve – Service isolation valves are standard to unit. This includes a
system high pressure relief valve or internal compressor relief mechanism in compliance
with AShrAE 15.
Hot Gas By-Pass – Permits continuous, stable operation at capacities below the mini-
mum step of compressor unloading to as low as 5% capacity (depending on both the unit
and operating conditions) by introducing an artificial load on the cooler. hot gas by-pass
is installed on only refrigerant system #1 on two-circuit units.
Flanges (ANSI/AWWA C-606 coupling) – Consists of two (2) flange adapters for grooved
end pipe (standard 150 psi [10.5 barg] cooler).
Flow Switch – The flow switch or its equivalent must be furnished with each unit.
• 150 PSIG (10.5 barg) DWP – for standard units. a vaporproof SPdT, NEmA 4X
switch (150 PSiG [10.5 barg] dWP), -20°f to 250°f (-29°C to 121°C), with 1" NPT
connection for upright mounting in horizontal pipe will be installed. (field-mounted.)
Differential Pressure Switch – Alternative to the above mentioned flow switches. A 300
psig (21 barg) maximum working pressure, SPdT 5 amp 125/250VAC switch will be in-
stalled. The range will be 3-45 PSiG (0.2-3 barg), deadband 0.5 - 0.8 psi (0.003 - 0.005
barg), with 1/4" NPTE Pressure Connections.
CONDENSER AND CABINET OPTIONS
Condenser coil protection against corrosive environments is available by choosing any
of the following options. for additional application recommendations, contact your local
Quantech office.
Pre-Coated Fin Condenser Coils – The unit's coils are constructed with epoxy coated
aluminum fins. This can provide corrosion resistance comparable to copper-fin coils in
typical seashore locations. Either these or the post-coated coils (below), are recommend-
ed for units being installed at the seashore or where salt spray may hit the unit.
Post-Coated Dipped Condenser Coils – The unit's coils are constructed with dipped-
cured condenser coils. This is the choice for corrosive applications (with the exception of
strong alkalies, oxidizers and wet bromine, chlorine and fluorine in concentrations greater
than 100 ppm).
Enclosure Panels (Unit) – Tamperproof enclosure panels prevent unauthorized access
to units. Enclosure panels can provide an aesthetically pleasing alternative to expensive
fencing.
Louvered Panels (Full Unit) – louvered panels surround the front, back, and sides of the
unit. They prevent unauthorized access and visually screen unit components. Unrestricted
air flow is permitted through generously sized louvered openings. This option is applicable
for any outdoor design ambient temperature up to 115°f (46°C). recommended for use
with the low Ambient kit where wind gusts may exceed five mph (eight kph).
Ultra Quiet Fans – The chiller is equipped with specially designed fans and motors to pro-
vide lower sound levels yet retain appropriate airflow. The result is reduced fan generated
sound with minimal effect on the chiller capacity or efficiency at standard Ahri conditions.
The fans are three-bladed for 60hz and five-bladed for 50hz.
Vibration Isolators – level adjusting, spring type 1" (25.4mm) or 2" deflection or neo-
prene pad isolators for mounting under unit base rails. (field-mounted.)
FORM QTC2-eg1 (515)
11