Field Control Wiring
ZONE THERMOSTATS Ð Install a Carrier approved ac- cessory zone thermostat assembly in each zone according to installation instructions included in the accessory. Locate each thermostat assembly in the space where it will sense average zone temperature.
Route thermostat cable or equivalent single leads of no. 18 AWG (American Wire Gage) colored wire from thermo- stat subbase terminals through opening on base unit (Fig. 1, 2, 4, and 5) to
ZONE MODULE CONNECTIONS Ð Any module may be controlled independently or jointly with another module or modules. Modules are combined into nests that form indi- vidual Class II circuits (40 va) as follows:
Modules no. 1 and 2, 3 and 4, 5 and 6, 7 and 8, 9 and 10
The control signal can be transferred from one nest to another nest by using
Under no circumstances shall the transformer power from one Class II circuit be interconnected with any other circuit.
Thermostat heat anticipator settings are indicated for each permitted zone module connection arrangement illustrated in Fig.
To Join Modules of the Same Nest Into the Same Zone (i.e., modules no. 1 and 2) Ð Install
To Join Modules Not of the Same Nest Into the Same Zone (i.e., modules no. 2 and 3) Ð Install the
| LEGEND |
AFS | Ð Air¯ow Switch |
CR | Ð Control Relay |
ECR | Ð Economizer Relay |
ECT | Ð Economizer |
GV | Ð Gas Valve (not used on 50ME units) |
HC | Ð Heater Contactor |
HR | Ð Heater Relay |
IFC | Ð Indoor (Evaporator) Fan Contactor |
LLS | Ð Liquid Line Solenoid |
MC | Ð Master Cooling |
MCR | Ð Master Cooling Relay |
MH | Ð Master Heating |
MHR | Ð Master Heating Relay |
MU | Ð Master Unit |
MUR | Ð Master Unit Relay |
NC | Ð Normally Closed |
NO | Ð Normally Open |
NS | Ð Night Setback |
SW | Ð Switch |
TRAN Ð Transformer
NOTE:
Fig. 10 Ð Zone Control Board Component Location
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