Quantech QCC3 Manual page 55

Guide Specifications (Cont'd)
QUANTECH
system start timer condition, compressor run status, no cooling load condition, day,
date and time, daily start/stop times, holiday status, automatic or manual system
lead/lag control (when controlling based on Discharge Air Temperature only), auto-
matic lead/lag of compressors within a system, compressor starts/operating hours
(each), status of hot gas valves, and fan operation, run permissive status, number
of compressors running, liquid solenoid valve status, load & unload timer status.
7. System Safeties: Shall cause individual compressor systems to perform auto shut
down; manual reset required after the third trip in 90 minutes. Includes: high dis-
charge pressure, low suction pressure, high pressure switch, and motor protector.
Compressor motor protector shall protect against damage due to high input current
or thermal overload of windings.
8. Unit Safeties: Shall be automatic reset and cause compressors to shut down if low
ambient, or under voltage.
9. Alarm Contacts: Low ambient, low voltage, low battery, and (per compressor cir-
cuit): high discharge pressure, and low suction pressure.
10. High Ambient Control: Permits unit operation above 115°F (46°C) ambient.
D. Manufacturer shall provide any controls not listed above, necessary for automatic con-
densing unit operation. Mechanical Contractor shall provide field control wiring neces-
sary to interface sensors to the condensing unit control system.
2.06 POWER CONNECTION AND DISTRIBUTION
A. Power Panels:
1. NEMA 3R/12 (IP55) rain/dust tight, powder painted steel cabinets with hinged,
latched, and gasket sealed outer doors. Provide main power connection(s), control
power connections, compressor and fan motor start contactors, current overloads,
and factory wiring.
2. Power supply shall enter unit at a single location, be 3 phase of scheduled voltage,
and connect to individual terminal blocks per compressor. Separate disconnecting
means and/or external branch circuit protection (by Contractor) required per appli-
cable local or national codes.
B. Exposed compressor, control and fan motor power wiring shall be routed through liquid
tight conduit.
2.07 ACCESSORIES AND OPTIONS
Some accessories and options supercede standard product features. Your Quantech
Sales Representative will be pleased to provide assistance.
A. Microprocessor controlled, Factory installed Across-the-Line type compressor motor
starters as standard.
B. Outdoor Ambient Temperature Control
1. Low Ambient Control: Permits unit operation to 0°F (-18°C) ambient. Standard unit
controls to 32°F (0°C) ambient.
FORM QCC3-EG1 (517)
55