Cable Requirements; Corayvac - Roberts Gorden CORAYVAC Installation Manual

®
ROBERTS GORDON

CORAYVAC

panel over pre-drilled holes and secure control panel
using minimum 5/16" - 18 x 2" bolts and washers (not
supplied).

3.3 Cable Requirements:

As per individual building specification for class of
cable to be used. Use copper conductors only. Below
is the recommended cable for the various connec-
tions for CORAYVAC ® and COMPLETE™ Modulat-
ing Heating Control.
CAUTION:
• Separate line and low voltage circuits.
• Do not run line voltage wiring through bottom
section of enclosure that houses control
board.
• Do not run low voltage through top section of
enclosure that houses the relay board.
• Do not run line and low voltage wiring in same
conduit.
• Do not run wiring for vacuum pumps 1 and 2
from VFDs in the same conduit.
Note:
Avoid running communication wires or sensor input
wires next to AC power wires or the controller's relay
output wires. The resulting noise can affect signal
quality. Common sources of noise are:
• Spark igniters
• Radio transmitters
• Variable speed drives
• Electric motors (> 1hp)
• Generators
• Relays
• Transformers
• Induction heaters
• Large contactors (i.e., motor starters)
• Video display devices
• Lamp dimmers
• Fluorescent lights
®
3.4 CORAYVAC and COMPLETE™ Modulating
Heating Control Installation Materials
Note: Systems must be electrically grounded in
accordance with the following codes: United States:
Refer to National Electrical Code®, NFPA 70 - latest
revision. Wiring must conform to the most current
National Electrical Code®, local ordinances and any
special diagrams furnished.
Canada: Refer to Canadian Electrical Code, CSA
16
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M H C C
ODULATING EATING ONTROL
I M
ONTROLLER NSTALLATION ANUAL
C22.1 Part 1 - latest revision. Plan accordingly.
3.4.1 Switchable Loads
The controller relays are rated for switching loads no
greater than 6 A. The total added current load for all
4 relays must not exceed 20 A.
3.4.2 Control Programming Details
Controllers are pre-programmed. Can be configured
in the field to any combination of one/two pumps,
four heating zones, single stage or modulating uni-
tary heaters, CORAYVAC
systems.
• Control Power Supply Connection
The power connection should be made with cable,
size 12 AWG.
• Four Digital Output (Relays)
The control connection for load of each individual
relay should be made with cable, size 14 AWG.
• Modulation Signal from Control Board (UO 5-8)
0-10V control signal from outputs UO 5-8 on the
modulation controller to modulating heaters, should
be made with cable, size 18 AWG.
• Digital Input
The wiring connection for the pressure switch should
be unshielded cable, size 18 AWG.
• Indoor Sensor Cable
Rnet communication wires should be connected in a
daisy-chain or hybrid configuration. For star configu-
ration, contact factory. See examples on Page 17 ,
Figure 9 through Page 18, Figure 10.
Note: Use the specified type of wire and cable for
maximum signal integrity.
Description
Conductor
Max Length
Insulation
Color Code
Shielding
UL Temperature
Rating
Voltage
Listing
® ®
or VANTAGE
4 conductor, shielded, CMP, plenum
rated cable
22 AWG (7x0096) bare copper
500' (152 m)
Low-smoke PVC (or equivalent)
Black, white, green, red
If shielded, Aluminum/Mylar shield
(100% coverage) with TC drain
wire
32-167°F (0-75°C)
300 Vac, power limited
UL: NEC CL2P, or better
Multiburner