McQuay seasoncon ALP-067A, Установка и техническое обслуживание

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Figure 9 shows typical field wiring that is required for unit instal-
lation. Items that require field wiring are: liquid line solenoids
(SVl & SV2) optional hot gas bypass solenoid (SV5) and the cooling
thermostat as well as the unit power supplies.
FIGURE 9
TYPICAL FIELD WIRING
DISCONNECT UNIT MAIN
B Y O T H E R S - - \ , , < T E R M I N A L B L O C K
_ _ _
COMPRESSORS
A N D F A N M O T O R S
_ _
WH
\
SEPARATE
LEGEND
POWER FOR CONTROLS
I
DISCONNECT BY OTHERS O P T I O N A L
8
ANOTE
I
TRANSFORMER
FUSE-IO A
0 II
- F L O W S W I T C H
SYSTEMS)
SOL. VALVE
REFRIGERANT CIRCUIT I
SAFETY AND OPERATING
GAS BY PASS
CONTROLS
SOL VALVE
3 8 4 S T A R T
CLOCK;;-
RELAYS
RELAYS
PSI.2
SWITCHES
TIME DELAYS
Rx-EVAP. FAN INTERLOCK
PREVENTS OPENING
SV’S WITHOUT LOAD
RELAYS PROVIDE
RECYCLING PUMP
DOWN DURING OFF
SEASON
REFRIGERANT CIRCUIT 2
SAFETY AND OPERATING
CONTROLS
UNIT CONDENSER FANS
OPERATING CONTROLS
POWER SUPPLY
FOR CONTROLS
P U M P S T A R T E R
PUMP STARTER
CIRCUIT
RIO NOTE; CIRCUIT SHOWN ASSUMES CONTINUOUS
6 6 P U M P I N T E R M I T T E N T
S Y S T E M S 1
I I
PUMP OPERATION CONSULT
I I
Thermostat Wiring
Since it is impossible for to anticipate the type of installa-
tion that an ALP condensing unit may be used on, we do not factory
install a thermostat. We do,
however, provide numbered terminals in-
side the unit control center to which a thermostat may be connected.
These terminals are shown and labeled "Terminals For Thermostat" on
the electrical schematics.
On a two circuit unit it is important to connect the thermostat so
that as successive stages of cooling are called for, the compressors
in the unit will be started to alternately increase the condenser
load from refrigerant circuit 1 to circuit 2. This is illustrated
in Table 9. Figure 10 shows how to install 2 independent four stage
thermostats for controlling an 8 stage unit and Figure 11 shows typi-
cal field wiring for an 8 stage thermostat.
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