TemperZone Econex Pro - 2. INSTALLATION; Clearances and Service Access; Mounting Guidelines

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2.3 Condensate Drains
The condensate drains should be ‘U’ trapped outside the
unit. The traps should have a vertical height of at least 100
mm. The drain lines should have a slope of at least 1 in 50
and must not be piped to a level above the unit drain pipe.3.
Refrigeration System
3. REFRIGERATION SYSTEM
3.1 General
Each OPA 970 have two independent refrigeration systems
and two inverter compressors to provide the exibility
and economy of two stage operation, i.e. utilising one to
two systems as conditions vary, plus the advantage of
staggered starting, all stages being variable for improved
control and system efciency.
Each refrigeration system has been charged with R32
refrigerant; refer Specications document for amount.
3.2 Compressors
The compressors are inverter scroll type. The compressor
lubricant is POE-46 (NXG5020 or equivalent). Note, this oil
absorbs moisture quickly if exposed to open air.
Some models are a mix of single inverter and three xed
speed compressors. Please check the Specication Sheet
relevant to your unit.
4. WIRING
4.1 Electrical Requirements
Electrical work must be done by a qualied electrician and
meet standard AS/NZS 3000.
DANGER! LIVE ELECTRICAL CONNECTIONS. ISOLATE MAINS POWER
BEFORE WORKING ON UNIT. ONLY QUALIFIED PERSONS WHO
ARE COMPETENTLY TRAINED SHOULD PERFORM SERVICE AND
MAINTENANCE TASKS.
The unit must be wired directly from a distribution board
using an appropriately sized circuit breaker. The termination
point for the mains cable is in the electrical compartment. An
isolating switch is required, near but not on the unit.
A hole for power cable entry is provided bottom right-hand
corner, next to the compressor access door. From there
route the cable into the electrical box via the hole on the
bottom of the electrical box or through the hole on the RH
side of the electrical box.
4.2 Controls Wiring
A hole for communication cable entry is provided bottom
left-hand corner, next to the compressor access door. Before
wiring, the method of control should be established from
the following list. Follow specic instructions in the following
sections. Section 4.3 is important to all sections.
Control method Section
Sensors and Inputs 4.3
BMS – BACnet Interface 4.4
BMS – Modbus Interface 4.5
Standalone 4.5
4.3 Sensors & Inputs
See table below for sensors and inputs required for each
control method.
Carel c.pCO
connections
Factory
Fitted
BMS
Bacnet/
Modbus
BMS -Low
Level
Controller
Stand
alone
Sensor Pin Signal
Room Temp. U1 0-10VDC Note 1 Note 3 × √
Room RH% U2 0-10VDC Note 1 Note 3 × √
ID Fan Speed
Req
U3 0-10VDC × Note 2
RA Temp. U4 0-10VDC √ √ √ √
RA RH% U5 0-5VDC √ Note 4
SA Temp. U6 NTC √ √ √ √
SA RH% U7 0-5VDC √ √ √ √
CO2 UC8 0-10VDC Note 1 Note 1 0 √
The following inputs relate only when using external low level control:
Enable ID4 24VAC × × √ ×
Occupancy ID6 24VAC × × √ ×
Fault NO7 Relay × × √ ×
Notes:
1. Factorysuppliedloose,tasrequiredincontrolledspace.
2.Optionallyprovide0-10VDCcontrolofindoorfanspeed,
willbeoverriddenifwrittentoBACnetorModbusindoorfan
speedregister.CanalsobesetusingaCarelpGD.
3.RoomtemperatureandRH%canbewrittenviaBACnetor
Modbusandwilltakepriorityoversensorreading,inthis
casesensorsarenotrequiredtobetted.
4.RAsensorsonlyrequiredforEconomiseroption.IfRAto
beusedtocontrolthespacethenwireRAsensorsintothe
RoomtemperatureandRoomRH%inputs.
4.4 BMS – BACnet Interface
1. Install ethernet cat 5 STP shielded cable between the
port shown in the below diagram of the Carel c.pCO
controller and the network switch of the BMS. The
default IP address of the controller is 192.168.1.10; refer
Controls Setup (p.9) for details on how to change.
2. Temperature and humidity sensors can be connected
directly to the Carel c.pCO controller (see specication
sheet for wiring diagram). Alternately the space
temperature and humidity can be written by the BMS to
BACnet objects which will take priority over any sensors
that are connected.
SingleunittoBMS:
OPEN
DRAIN
MINIMUM
SLOPE
20 mm PER m
(1 IN 50)
100 mm
MINIMUM
200 mm
APPROX.
'U' TRAP
100 mm
APPROX.
VENT PIPE
FOR LONG
CONDENSATE
DRAIN RUNS