York Meridian, Техническое руководство

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Meridian

Systems 25
Zoning Design Guide
036-21478-001 Rev. A (0802)
Zone Controller
•
24 VAC Supply Voltage (10 VA)
(2) Conductors - Determine minimum
wire size from Figure 1-16 on page 26.
•
Communications Loop
(2) Conductors 18 gauge minimum
twisted pair with shield
(York communication wire,
Belden #82760 or equal)
•
Room Sensor
(2) Conductors 24 gauge minimum
(3) Conductors if using optional slide
Sensor Wiring
Meridian

temperature sensors utilize a type III ther-
mistor element that is one of the most commonly used
sensors in the building controls industry. Sensor wire
should be a minimum of 24 gauge however larger wire
such as 18 gauge is commonly used.
Conventional thermostat cable is acceptable in most
commercial and institutional installations. In some in-
stallations which have the potential for high electrical
noise, such as broadcast facilities (radio, TV, etc.), heavy
industrial (machinery, welding equipment, etc.), and
medical (x-ray, scanning, etc.), it is advisable to use
shielded cable on sensors which are located in or close
to these environments. The same cable used for the com-
munication bus can be used in these situations.
Sensor requirements are:
•
Supply Air Sensor
(2) Conductors 24 gauge minimum
•
Return Sensor
(2) Conductors 24 gauge minimum
•
Outside Air Sensor
(2) Conductors 24 gauge minimum
•
Room Sensor
(2) Conductors 24 gauge minimum
(3) Conductors if using optional slide
adjust
Controller Wiring
All controller wiring should be in accordance with all
local, state, and national codes. It is recommended that
all wire be a minimum of 18 AWG unless otherwise
specified in the charts below. Controller connections
and wire sizing is as follows:
Zone Manager
•
24 VAC Supply Voltage (25 VA)
(2) Conductors - Determine minimum
wire size from Figure 1-16 on page 26.
•
Communications Loop
(2) Conductors 18 gauge minimum
twisted pair with shield
(York communication wire,
Belden #82760 or equal)
•
Supply Air Temperature Sensor
(2) Conductors 24 gauge minimum
•
Return Air Temperature Sensor
(2) Conductors 24 gauge minimum
•
Outside Air Sensor
(2) Conductors 24 gauge minimum
•
Supply Static Pressure Sensor
(2) Conductors 24 gauge minimum
•
Bypass Damper
(4) Conductors 24 gauge minimum
•
HVAC Unit Control Wiring
(6) Conductors 24 gauge minimum
R (Common), G (Fan), Y1 (Cool 1),
Y2 (Cool 2), W1 (Heat 1), W2 (Heat 2)
For Meridian

Plus System With
Optional Staging Expansion Board up to
an additional (8) conductors Y3 through
Y6, W3 Through W6
System Manager
•
24 VAC Supply Voltage (25 VA)
(2) Conductors - Determine minimum
wire size from Figure 1-16 on page 26.
•
Communications Loop
(2) Conductors 18 gauge minimum
twisted pair with shield
(York communication wire,
Belden #82760 or equal)