Roberts Gorden 10081601NA Rev H 12/11 - Manual (Page 28)

ROBERTS GORDON
®
ULTRAVAC™ C ONTROLLER I NSTALLATION M ANUAL
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3.3 Cable Requirements:
As per individual building specification for class of
cable to be used. Use copper conductors only.
3.3.1 ULTRAVAC™ Controller
Below is the recommended cable for the various
connections for ULTRAVAC™ Controller:
• Line Power Supply
The power connection should be made with cable,
size 14 AWG.
• Eight Digital Output (Relays)
The control connection for load of each individual
relay should be made with cable, size 16 AWG.
• Digital Input
The wiring connection for the pressure switch
should be unshielded cable, size 18 AWG.
• Indoor Sensor Cable
a) Shielded cable - Four twisted pairs of stranded,
24 AWG minimum or equivalent Madison Cable
#08CFJ00004; Belden #9681.
b) Unshielded cable - Four twisted pairs of stranded,
24 AWG minimum or equivalent AMP#219538,
#219513; Belden#1585, #1583A.
• Outdoor Sensor Cable
Shielded cable - One twisted pair of 22 AWG mini-
mum or equivalent Belden #8451, #1503A; General
Cable #C2514.
• Communications between Multiple Controllers
(RS-485)
One twisted pairs of 18 AWG minimum or equiva-
lent shield cable; Belden #1902, General Cable
#C1670A.
3.3.2 ULTRAVAC™ BMS Link Controller
Below is the recommended cable for the various
connections for ULTRAVAC™ BMS Link Controller:
• Line Power Supply
The power connection should be made with cable,
size 18 AWG.
• Communications between ULTRAVAC™ BMS
Link and Multiple Controllers
One twisted pair of 22 AWG minimum or equivalent
shield cable; Belden #1902, General Cable
#C1670A.
3.3.3 Variable Frequency Drive (VFD)
Below is the recommended cable for the various
connections for VFD:
• Line Power Supply
Input Wire Size Requirements
VFD P/N
Wire Size
VFD75115 or VFD75115N4 12 AWG
VFD75230 or VFD75230N4 14 AWG
VFD20230 or VFD20230N4 12 AWG
VFD75460 or VFD75460N4 14 AWG
VFD20460 or VFD20460N4 14 AWG
• VFD(0-10 Vdc) Speed Reference Control Wiring
Shielded cable - one twisted pair of 22 AWG mini-
mum or equivalent Belden #8451, #1503A; General
Cable #C2514.
3.3.4 Repeater
Below is the recommended cable for the various
connections for the repeater:
• Line Power Supply
The power connection should be made with cable,
size 18 AWG.
• RS485 Communications
Multiple repeaters may be installed on the main loop
and all communications cable should be made with
shielded cable one twisted pair of 18-22 AWG.
3.4 Electrical Installation Requirements of
ULTRAVAC™ Controller
• ULTRAVAC™ Controller must be feeding from a
local fused isolator for a total amperage not
exceeding 25 A.
• Eight digital outputs for each individual relay must
not exceed 3 A.
NOTES:
• The total added current load for each individual
relay must not exceed 3 A.
• The total added current load for all 8 relays must
not exceed 25 A.
DANGER
Electrical Shock Hazard
Disconnect electric before service.
Controller must be properly grounded to an
electrical source.
Failure to follow these instructions can
result in death or electrical shock.